The following are some well-known brands of imported used spark machines: First, Switzerland Charmilles: Brand Introduction: Charmilles is a world-renowned manufacturer of electrical processing equipment, its spark machine is known for its high precision, high performance and high stability, widely used in mold making, precision machining and other fields. Product features: the use of advanced discharge technology, able to achieve high-precision processing, excellent processing surface quality, low electrode loss. For example, its ROBOFORM series mirror spark machine, with automatic programming, intelligent control and other functions, can greatly improve processing efficiency and precision. Second, Japan Shadick: Brand introduction: Shadick in the field of EDM has a deep accumulation of technology and rich experience, its products with high speed, high precision and high reliability by the market recognition, in the mold manufacturing, electronic parts processing and other industries are widely used. Product features: Unique discharge circuit design makes the machining speed increase dramatically and ensures the machining accuracy at the same time. For example, AM series mirror spark machine, with good operability and maintenance, can be adapted to a variety of materials and complex shapes of processing. Third, Japan Makino: Brand introduction: Makino is a long history of machine tool manufacturing enterprises, its spark machine products in Japan and the international market enjoys a high reputation for precision machining and high performance and known, commonly used in aerospace, automotive manufacturing and other high-end areas of parts processing. Product features: Makino spark machine's mechanical structure is designed with precision to ensure high-precision movement of the electrode, thus realizing high-quality machining results. Its EDNC series spark machine, with high-speed electrical discharge machining capabilities and excellent surface roughness control, can meet the high precision requirements of parts processing needs. Fourth, Germany Demagi: Brand Introduction: Demagi as one of the world's leading machine tool manufacturers, its production of spark machine integration of advanced German manufacturing technology and processes, with high precision, high rigidity and high degree of automation, suitable for a variety of complex precision parts processing. Features: Adopting advanced CNC system and high-precision transmission components, it can realize precise machining control and efficient production. For example, the spark machine module in its DMU series of five-axis linkage machining centers is capable of completing three-dimensional surface machining of complex shapes to meet the needs of the high-end manufacturing industry for precision parts machining. Fifth, Japan Hitachi: Brand Introduction: Hitachi's spark machine products occupy a certain share of the Japanese market, with its stable performance and reliable quality by the user's praise, widely used in machining, electronics manufacturing and other industries. Product features: Hitachi spark machine focuses on the stability and durability of the equipment, and its structure is well designed to run stably for a long time. For example, its MP30E CNC series mirror surface spark machine, processing high precision, can meet the general mold manufacturing and parts processing precision requirements.

The performance and quality of a used spark machine is mainly judged from the following aspects: 1. Assessment of machining accuracy Worktable flatness check: Use a level to place on the surface of the worktable to check the levelness of the worktable at different positions. The smaller the flatness error, the better the equipment can ensure the relative positional accuracy between the workpiece and the electrode during the machining process. For example, high-precision spark machine table flatness error can be controlled within ± 0.01mm. Electrode fixture perpendicularity detection: use a ruler against the electrode fixture, observe the degree of fit between the two, or use a percentage meter to measure the deviation of the electrode fixture in the vertical direction. If the perpendicularity is not good, the angle between the electrode and the workpiece will be deviated during the machining process, which will affect the machining accuracy, especially when machining the molds with perpendicularity requirements. Positioning accuracy test: Evaluated by performing multiple positioning machining on a standard workpiece. For example, install a positioning block with a precise scale on the table, set the positioning program of the spark machine, carry out multiple repetitions of positioning processing, and measure the deviation of each processing position from the set position. The deviation of a spark machine with high positioning accuracy is usually within a few micrometers, which can meet the needs of precision machining. 2. Discharge performance test Observation of discharge stability: Let the spark machine run under normal processing parameters for a period of time, and observe the spark status during the discharge process. Stable discharge process, the spark should be evenly distributed, no frequent arc interruptions or abnormal discharge phenomenon. Can be initially judged by observing the spark color and sound, the normal discharge spark is blue-white and sound uniform. If there is a yellow spark or discharge sound at times, it may indicate that the discharge is not stable, which will affect the processing surface quality and processing speed. Electrode loss measurement: After processing a certain number of workpieces, measure the degree of electrode loss. You can choose a simple geometry electrode, such as a cylindrical electrode, and use a micrometer to measure the size change of the electrode before and after machining to calculate the electrode loss rate. Generally speaking, the electrode loss rate of a good performance spark machine is low, for example, the electrode loss rate of some advanced CNC spark machines can be controlled in the range of 0.1% - 0.3%, lower electrode loss helps to reduce the machining cost and improve the machining accuracy. Machining speed test: According to the specification and application range of the spark machine, select the appropriate workpiece material and processing parameters for machining speed test. For example, for copper electrode machining mold steel workpiece, set certain parameters such as discharge current, pulse width and pulse interval, and record the time required to process a certain depth or volume of workpiece. Different brands and models of spark machine processing speed varies greatly, efficient spark machine can complete the processing task in a shorter period of time, improve productivity. 3. Equipment Stability Considerations Running noise and vibration check: in the no-load and loaded (processing) state of the equipment, respectively, listen to the sound emitted by the equipment and feel the vibration situation. Normal operation of the spark machine should be only a slight motor running sound and discharge sound, no abnormal friction, impact or whistling sound. At the same time, touch the equipment shell, feel the degree of vibration, if the vibration is too large, it may indicate that the internal mechanical parts of the equipment there are loose, wear and tear or imbalance, etc., which will affect the machining accuracy and equipment life. Long-time running test: If conditions permit, let the spark machine run continuously for several hours or even a day, to observe whether the equipment will appear overheating, alarms, precision degradation and other problems. During long time running, the electrical system, cooling system and mechanical parts of the equipment can be fully tested. Stable equipment can maintain good performance status and will not break down due to long time working. Check the maintenance records: Ask the seller for the maintenance records of the equipment, to understand the equipment's past failures, maintenance content and maintenance frequency. If the equipment often breaks down and has frequent repairs, it may indicate that the equipment has potential quality problems or is used in a poor environment. 4. Key Component Inspection Condition of electrode clamps: Check whether the clamping force of the electrode clamps is sufficient and uniform, and whether the mechanical structure of the clamps is intact, with no damaged or deformed parts. You can manually operate the fixture to clamp and loosen the electrode, feel whether its strength is appropriate, and observe whether the fixture opening and closing action is smooth. If the clamping force of the fixture is insufficient, the electrode may loosen during the machining process, affecting the machining accuracy. Working fluid system function: The working fluid system is crucial to the machining performance of the spark machine. Check whether there is any leakage in the working fluid tank and whether the working fluid pump is in normal working condition, including whether the flow rate and pressure meet the requirements. You also need to check whether the filter is clogged. A good filtration system can ensure the cleanliness of the working fluid and prevent impurities from entering the machining area and affecting the machining quality. For example, the flow rate of the working fluid should be able to meet the discharge cooling demand between the electrode and the workpiece; insufficient flow rate may lead to unstable discharge. CNC system evaluation: For CNC spark machines, check whether the display of the CNC system is clear, whether the buttons are sensitive, and whether the operation interface is friendly. Test the programming function of the CNC system, input some simple machining instructions and observe whether the system can recognize and execute them correctly. At the same time, check whether the storage function and communication function (such as data transmission with external devices) of the CNC system are normal. A stable and fully functional CNC system can realize more complex machining tasks and improve machining accuracy and efficiency. Screw and guide rail wear check: The precision of the screw and guide rail directly affects the movement precision of the spark machine electrode. Check for wear, scratches or corrosion by observing the surface of the screw and guide rail. Slight wear can be solved by adjusting the compensation, but if the wear is serious, it will cause the electrode movement precision to decrease and affect the machining quality. You can use a micrometer to measure the straightness and motion accuracy of the screw and guideway to assess the degree of wear.

When buying a used spark machine, here are some things to keep in mind: I. Equipment performance and quality Processing accuracy: check the table flatness, verticality of the electrode fixture, positioning accuracy, etc., you can use professional testing tools such as a percentage meter to measure to ensure compliance with the production and processing requirements, such as the processing of precision molds, precision needs to be controlled within a small range. Electrode loss: to understand the spark machine electrode loss, electrode loss is too large not only affects the processing accuracy, but also increase production costs, quality spark machine electrode loss rate should be low, such as some CNC mirror spark machine minimum electrode loss of up to 0.1%. Processing speed: ask the maximum processing speed of the equipment and the actual processing speed under different processing conditions, the processing speed directly affects the production efficiency, especially important for mass production of enterprises, such as Shadick mirror spark machine and other brands of high-end models of processing speed is relatively fast. Stability: Concerned about the stability of the equipment in the long run, can be viewed through the use of equipment records, maintenance records, as well as on-site test runs and other ways to assess the stable operation of the equipment to reduce downtime, improve production efficiency. Second, the condition of the equipment Appearance and color: check the appearance of the equipment whether there is obvious wear and tear, corrosion, collision marks, etc., a good appearance usually indicates that the equipment is used in a better environment, maintenance is more appropriate, if the appearance of the damage is serious, it may imply that there is a potential problem within the equipment. Key components: Check the wear and tear of key components such as electrode clamps, working fluid system, CNC system, screws, guide rails, etc., to ensure that these components can operate normally without abnormal noise, leakage, etc., which play a key role in the performance and accuracy of the equipment. Use of life and frequency of use: to understand the use of equipment and the frequency of use, the use of long life and frequent use of equipment, its performance and accuracy may be reduced, the degree of aging of the parts will be relatively high, you can ask the seller to provide the relevant information on the use of the equipment or check the equipment's operating time records. Third, equipment matching and integrity Electrodes: Confirm whether the corresponding electrodes are equipped, whether the types and specifications of the electrodes meet the production requirements, if you need to purchase electrodes separately, you need to consider the cost and adaptability. Working fluid: check whether the working fluid system is complete, including the working fluid tank, pumps, filters and other components are working properly, the quality of the working fluid and the good operation of the circulatory system has an important impact on the processing results and equipment life. Other accessories: check whether the equipment's random accessories are complete, such as operating manuals, programming software, data lines, etc., complete accessories help the normal use and maintenance of equipment. Fourth, price and cost-effective Market price research: before buying, the market price of the same brand, the same type of second-hand spark machine research, to understand the general price range, in order to determine whether the price quoted by the seller is reasonable, to avoid losses due to price opacity. Cost-effective assessment: Considering the performance, condition, service life and other factors of the equipment, assess its cost-effective, not just the price as the only selection criteria, sometimes the price is a little higher but better performance and quality of the equipment, may be more investment value. V. After-sales service and technical support After-sales service commitment: ask the seller whether the seller can provide after-sales service, such as equipment commissioning, training, warranty, etc., clear after-sales service of the specific content, response time and mode, etc., good after-sales service can help users to solve the problems encountered in the process of using the equipment to reduce the maintenance costs and risks. Technical support ability: understand the seller or its technical team behind the technical support ability to provide users with technical advice, troubleshooting, upgrading and transformation services, for some complex CNC spark machine equipment, technical support is particularly important. Parts supply: to ensure that the seller can provide the equipment required for the original or compatible parts, so that when the equipment failure can be replaced in a timely manner to reduce equipment downtime, you can ask the seller about the inventory of parts, supply channels and prices and other information. Sixth, legality and property rights The source of the equipment is legal: confirm the source of the equipment is legal, ask the seller to provide the purchase invoice of the equipment, property rights and other relevant documents, to avoid the purchase of stolen or property rights disputes in the equipment, so as not to bring unnecessary legal risks. Contract signing: When buying a used spark machine, be sure to sign a detailed contract of sale with the seller to clarify the rights and obligations of both parties, the contract should include the name of the equipment, specifications, price, quality assurance, after-sales service, delivery, payment and other important terms, in order to protect their legitimate rights and interests.

The following are some common used spark machine purchase channels: First, the second-hand equipment trading platform Processing network: there are more used spark machine transfer information, covering a variety of brands and models, such as 2016 Charmilles FORM20 mirror spark machine, Taiwan Yate M75NF spark machine, etc., the price ranges from a few thousand dollars to hundreds of thousands of dollars, according to their own needs to choose the right equipment, and contact the seller directly to negotiate . Alibaba: Some merchants will sell used spark machine, such as Suzhou Good Heng Environmental Protection Technology Co., Ltd. provides a variety of brands and models to choose from, such as the second-hand Archie mirror spark machine ROBOFORM 350YEDM, second-hand with C-axis mirror spark machine FO23UP, etc., and also indicates some of the parameters of the equipment and after-sales service and other information. Second, the professional machine tool equipment market Shenzhen Machinery City: Shenzhen has a lot of machinery city or mechanical and electrical market convergence of many used machine tool equipment business, such as Shenzhen Baoan Fuyong machinery market, there are a variety of brands of second-hand spark machine spot supply, you can check the appearance of the equipment on the spot, color, operating conditions, etc., intuitive understanding of the situation of the equipment, but also face-to-face exchanges with the seller, to discuss the price and after-sales service and other issues. Dongguan used machine tool market: Dongguan is a developed manufacturing region, there are some larger used machine tool market, such as the used machine tool market in Dalang, Dongguan, where there is a wealth of used spark machine resources, brands and models, the choice of space is larger, you can compare the purchase, to find cost-effective equipment. Third, the auction Professional auction companies: some professional auction companies will be held from time to time used machine tool equipment auctions, such as the China Auctioneers Association and other organizations of the auction, there may be used spark machines and other equipment for bidding, through the bidding way to buy, there is a chance to get a lower price for the desired equipment, but the need to understand in advance of the auction rules and precautions, to do a good job of preparation. Network auction platform: such as Ali Auction and other network auction platforms will also have a second-hand spark machine auction activities, the auction of a wide range of sources of equipment, personal idle, but also corporate bankruptcy and liquidation or renewal of equipment for sale, in the participation of the bidding, we must carefully check the description of the equipment and pictures, to understand the basic situation and defects and other issues. Fourth, the enterprise idle equipment for sale Directly contact the relevant enterprises: some enterprises due to transformation and upgrading, shutdown or closure of production and other reasons, will sell idle second-hand spark machine, through industry contacts, network search, etc., to find such enterprises, directly with them to contact the purchase of equipment, so that you can save the intermediate links, reduce the cost of purchasing, but the need to pay attention to the legitimacy of the equipment and the integrity of the equipment to ensure that the equipment does not have disputes over property rights and other issues. Concerned about corporate bankruptcy and liquidation information: Concerned about the court, bankruptcy and liquidation agencies issued by the corporate bankruptcy and liquidation information, which may have used spark machines and other equipment disposal announcement, in accordance with the relevant procedures to participate in the bidding or negotiation of the purchase of the equipment purchased in this way is often more favorable price, but the condition of the equipment may be uneven, the need for careful assessment and screening. Fifth, machine tool equipment dealers Local dealers: local machine tool equipment dealers in addition to the sale of new equipment, will also operate some second-hand spark machine business, they will usually be acquired on the second-hand equipment testing, repair and refurbishment, so that the equipment to achieve a better state of use and then sold, and can also provide a certain degree of after-sales service and technical support, you can choose to buy a reputable dealers, operating for a long time, in order to protect their rights and interests. Network dealers: some network machine tool equipment dealers also provide used spark machine sales services, through the network platform to display and sell a variety of brands and models of used spark machines, such as Smart 360 and other platforms, you can browse the equipment information online, online consulting or telephone contact with the dealer, to learn about the details of the equipment and the purchase of the matter, the purchase of this way is more convenient, but need to pay attention to the selection of a formal and reliable network of dealers.

There are several main types of grinding heads for coordinate grinding machines: I. Classified according to the power source: Electric grinding head: It is a more common type of grinding head with the advantages of stable rotational speed and large output power, which can meet the needs of different grinding processes. For example, some of the Swiss Hauser coordinate grinding machines equipped with electric motor grinding head, its speed can be adjusted according to different processing requirements, the highest number of revolutions up to 80,000 rpm, the lowest number of revolutions of 9,000 rpm, can be grinding parts with a wide range of hole diameters. Pneumatic Grinding Heads: Also known as air-operated grinding heads, they are characterized by high rotational speeds and low vibration, and are suitable for high-precision grinding processes. Since compressed air is used as the power source, a stable air supply system is required to ensure the normal operation of the grinding head. The speed of the pneumatic grinding head can usually reach a high level, and in the process of processing can be a fast response, suitable for processing precision and surface quality of parts requiring high processing. Second, according to the abrasive material classification: Ceramic grinding head: sintered by the ceramic bond, the grain size sand used is generally brown corundum, white steel jade, chrome corundum, silicon carbide, etc., with good abrasion resistance and cutting performance, can maintain the shape of the grinding head in a longer period of time precision, suitable for a variety of metal materials for grinding and processing, can be used for the grinding of the inside of the aperture, the correction of molds, etc., and in the process of machining can be obtained with a high degree of dimensional accuracy and low surface roughness. It can obtain high dimensional accuracy and low surface roughness in the process. Diamond Grinding Head: It includes a base body and countless grinding bodies, multiple grinding grains are fixed in the base body at intervals, and the grinding bodies are made of diamond alloy material. Diamond grinding head has very high hardness and wear resistance, can grind all kinds of cemented carbide, glass, ceramics, sapphire and many tough, super alloy and different hard brittle non-metallic materials in small holes or tapered holes, etc., the processing hardness can reach HRA ≥ 85, and grinding processing quality is high, the whole process is convenient to grasp, simple to use, no need to dress, safe and reliable. Cubic Boron Nitride (CBN) Grinding Heads: Electroplated CBN coordinate grinding heads are suitable for high-speed precision grinding, internal grinding, small diameter hole processing and dressing high carbon, high-speed steel, tool and die steel and other high hardness and tough materials, with high material removal rate, easy to cut and low heat generation, etc., compared with the ceramic bond grinding head, both economic and affordable, and does not require frequent dressing, can be used for nozzles, bearing rings, compressors and steering It can be used for the processing of nozzles, bearing rings, compressors and steering pumps. Third, according to the grinding mode classification: Radial feed grinding head: mainly using the circumferential surface of the grinding wheel for grinding, feed each time the grinding wheel along the direction of the eccentric radius relative to the workpiece for a small amount of movement, is one of the most common grinding method, suitable for grinding a variety of internal holes and external cylindrical surfaces, when the use of ceramic bonded wheels, you can obtain very high dimensional accuracy and very low roughness. Plunge-cut grinding head: The end face of the grinding wheel is utilized for grinding, also known as endface grinding, and the grinding wheel is fed along the axial direction when feeding. Since heat and chips are not easily discharged, the grinding conditions are relatively harsh, so the end face of the grinding wheel should generally be corrected to a medium concave shape, and special care is needed when grinding to avoid overfeeding and causing the grinding wheel to burst, which is usually used in special cases such as grinding table shoulder surfaces, spherical surfaces, and end surfaces. Insert Grinding Head: The grinding wheel moves up and down rapidly while grinding around the contour of the part to be ground, which is characterized by a larger depth of cut and generates less heat, and at the same time, the runout requirement of the grinding wheel is relatively low, so it is especially suitable for the use of plated wheels for the grinding of the contour of the occasion, and it is used more often in the grinding of small holes, and it can get a lower roughness than the radial-feed type of grinding.

The following is the daily maintenance of the coordinate grinder: I. Cleaning and maintenance Machine exterior cleaning: After each use, the external surface of the machine tool needs to be wiped with a clean soft cloth to remove dust, oil and swarf and other debris to keep the appearance of the machine tool neat and clean. For difficult to remove stains, you can use the appropriate amount of detergent, but to avoid the use of detergents containing acidic ingredients, so as not to damage the surface of the equipment. Internal cleaning: regularly open the protective door and cover of the machine tool, use a special vacuum cleaner or compressed air gun to remove the dust inside the machine tool, especially the table, guide rail, screw and other parts, to prevent dust from entering the mechanical transmission components and electrical systems, affecting the normal operation of the equipment. Clean the coolant tank: regularly empty and clean the coolant tank, remove impurities, chips and oil in the coolant, and replace it with new coolant to ensure the cleanliness and cooling effect of the coolant. At the same time, check the level and concentration of coolant, add or adjust as needed. Second, lubrication system maintenance Check the lubricant oil level: Regularly check the lubricant oil level of each part of the coordinate grinder, such as the spindle box, guide rail, screw nut, etc., to ensure that the oil level is within the normal range. If the oil level is too low, the lubricant should be added in time to meet the requirements of the machine tool. Replacement of lubricant: Replace the lubricant regularly according to the recommendations of the machine tool manufacturer. Generally, replace the lubricant every 1-2 months during initial use and every 3-6 months thereafter. When replacing the lubricant, clean the oil tank and filter at the same time to remove impurities and dirt from the oil and ensure that the lubricant is clean. Grease filling: For some sliding parts and bearings of the machine tool, such as the guide rail slider, screw support bearings, etc., need to be regularly filled with grease. Filling should pay attention to the right amount, to avoid too much or too little grease, affecting the lubrication effect. Third, mechanical parts inspection and adjustment Guide rail inspection: Regularly check the flatness, straightness and lubrication of the guide rail to ensure that the surface of the guide rail is smooth, no wear and tear, no scratches. If the guide rail is found to be damaged, it should be repaired or replaced in time. At the same time, clean the guide rail and reapply lubricant to reduce friction and wear. Screw nut inspection: check whether the fit gap of the screw nut is appropriate, if the gap is too large, it will affect the positioning accuracy and machining accuracy of the machine tool, and need to be adjusted or replaced in time screw nut sub. In addition, it is also necessary to clean up the oil and debris on the screw to prevent it from entering the inside of the screw nut and affecting the transmission accuracy. Spindle inspection: check the rotational accuracy of the spindle, axial runout and radial runout is within the permissible range, such as abnormalities, the need to find the cause and repair in a timely manner. At the same time, check the spindle lubrication and cooling to ensure that the spindle in good working condition. Belt inspection and adjustment: Check whether the elasticity of the transmission belt is appropriate, too loose or too tight will affect the service life of the belt and transmission efficiency. If the belt is found to be loose, the belt tensioning device should be adjusted in a timely manner so that the belt to achieve the appropriate degree of tension; such as belt wear is serious, it should be replaced in a timely manner. Fourth, the electrical system maintenance Check the line connection: regularly check whether the electrical line connection of the machine tool is firm, there is no loose, false connection, damage and so on, to ensure the normal power supply and signal transmission of the electrical system. If found line problems, should be repaired or replaced in a timely manner damaged wires and connectors. Cleaning electrical components: Use a clean soft cloth or brush to gently remove dust and debris on the surface of the electrical components to prevent accumulation of dust leading to poor heat dissipation or short-circuit failure of the components. For some critical electrical components, such as inverters, drives, PLCs, etc., special attention should be paid to cleaning and maintenance. Check the grounding situation: Make sure the machine tool is well grounded and the grounding resistance should meet the requirements of relevant standards. Good grounding can effectively prevent electrical equipment due to leakage and safety accidents. Fifth, the maintenance of tools and grinding wheels Tool inspection and replacement: Regularly check the tool wear on the coordinate grinding machine, according to the service life of the tool and machining accuracy requirements, timely replacement of badly worn tools. When replacing the tool, pay attention to the installation accuracy and clamping force of the tool to ensure that the tool is firmly installed. Grinding wheel inspection and balance: Check the appearance of the grinding wheel for cracks, breakage and other defects, if there is any problem, the grinding wheel should be replaced immediately so as to avoid wheel rupture accidents in the grinding process. In addition, the newly installed grinding wheel or the grinding wheel after using for some time need to carry out static balance debugging, in order to ensure the smoothness of the grinding wheel in high-speed rotation, to improve the quality of grinding. Sixth, regular calibration and accuracy testing Regular calibration: In accordance with the requirements of the machine tool manufacturer, the coordinate grinder is calibrated regularly, including the positioning accuracy of the coordinate axes, repeatable positioning accuracy, perpendicularity, parallelism and so on. The calibration work should be carried out by professional personnel using professional testing tools and equipment to ensure that the machining accuracy of the machine tool is always maintained within the specified range. Machining accuracy testing: In the daily machining process, the machining accuracy of the machine tool can be tested regularly by machining standard test pieces. If any deviation in machining accuracy is found, the cause should be analyzed in time and corresponding measures should be taken to adjust and repair, such as recalibrating the machine tool and replacing worn parts.

The normal service life of a coordinate grinder is affected by a variety of factors, generally speaking, its normal service life is about 10-20 years. The following are some of the factors affecting the service life of the coordinate grinder: First, the quality of equipment and brand Brand differences: well-known brands are usually in the design, manufacturing process, parts selection and other aspects of the more stringent and sophisticated, the overall quality and performance of the equipment is more guaranteed, the service life is relatively long. For example, Switzerland Hauser, the United States Moore and other internationally renowned brands of coordinate grinding machine, under normal use and maintenance conditions, often can be used for 15-20 years or even longer. Models and Configurations: The performance and durability of coordinate grinders vary with different models and configurations. High-end models are equipped with more advanced technology, better components and more optimized structural design, which can withstand greater workload and more frequent use, and the service life will be extended accordingly. Second, the use of the environment Temperature and humidity: the coordinate grinder should be installed in a relatively stable temperature and humidity environment, the ideal temperature is generally 20 ℃ ± 1 ℃, relative humidity is not higher than 70.5%. If the ambient temperature is too high or too low, and the humidity is too large, it will easily lead to the deformation of the equipment parts, corrosion and wear and tear, thus shortening the service life. Cleanliness: Dust, metal shavings and other impurities in the working environment, if they enter the interior of the coordinate grinder, will increase the wear and tear of the parts, affecting the normal operation of the equipment and the maintenance of precision, but also may lead to problems such as failure of the electrical system, reducing the service life of the equipment. Therefore, keeping the working environment clean is essential to prolonging the service life of a coordinate grinder. Foundation Stability: Coordinate grinding machines need to be installed on a solid, stable foundation with anti-vibration grooves and other measures to reduce the impact of external vibrations on the equipment. Otherwise, prolonged vibration may cause the precision of the equipment to drop and the connection between various components to loosen, thus affecting the service life. Third, maintenance Daily maintenance: Daily cleaning, lubrication, fastening and other maintenance work is to ensure the normal operation of the coordinate grinder and extend the service life of the basis. Regularly clean the debris and dust on the surface and inside of the equipment, replace the lubricating oil in time, check and tighten the connection screws of each part, etc., which can effectively reduce the wear and tear of the equipment and the incidence of failure. Regular calibration: The accuracy of the coordinate grinder is crucial to the processing quality, so it needs to be calibrated regularly. Through professional testing tools and methods, check and adjust the various precision indexes of the equipment to ensure that it always stays within the specified range, which not only improves the machining accuracy, but also avoids excessive wear and damage of the equipment due to the excessively poor precision, and prolongs the service life. Fault maintenance: timely detection and treatment of equipment failure in the operation process, to avoid the expansion of the fault, for the protection of equipment performance and extend the service life is also very critical. For some minor faults, if you can repair in time, generally will not have too much impact on the overall life of the equipment; but if the fault is ignored, it may lead to more serious damage, or even make the equipment scrap. Fourth, the frequency of use and load Frequency of use: the higher the frequency of use, the relatively faster the wear and tear of the equipment, the service life will be shortened accordingly. If a coordinate grinder works continuously for more than 8 hours a day, the wear and tear of its parts will be more serious than that of the equipment that works for 4 hours a day. Processing load: processing workpiece material hardness, size, processing accuracy requirements and other factors will also affect the service life of the coordinate grinder. If you often process high hardness, size or precision requirements of the workpiece, the equipment needs to withstand a greater cutting force and higher workload, which will accelerate the wear and tear of parts and reduce the service life of the equipment. Fifth, the quality of operators Professional skills: skilled grasp of the operating skills of the coordinate grinding machine and the process of the operator, can correctly use the equipment, to avoid damage to the equipment caused by improper operation. For example, when loading and unloading workpieces, they can do it gently, avoiding collision with the table and grinding wheel; when adjusting the processing parameters, they can set them reasonably according to the material of the workpieces and processing requirements, avoiding overloading of the equipment or processing quality problems caused by unreasonable parameters. Maintenance awareness: operators with a good sense of maintenance will pay attention to the operating status of the equipment in their daily work, timely detection and reporting of abnormalities in the equipment, and cooperate with the maintenance personnel to carry out maintenance and repair of equipment, thus helping to extend the service life of the equipment.

Here are some ways to assess whether the price of a used coordinate grinder is reasonable: First, the condition of the equipment itself Use of years: the use of years is an important factor affecting the price. Generally speaking, the shorter the use of time, the relatively less wear and tear of the equipment, the remaining service life is relatively long, the price will be relatively high. For example, a used coordinate grinder that has been in use for 2 years will usually cost more than a grinder of the same model that has been in use for 5 years. Wear and tear: Carefully check the wear and tear of the various parts of the machine, such as the table, guideway, wheel spindle, etc. If the wear is severe, it will affect the machining accuracy. If the wear is serious, it will affect the machining accuracy and performance of the equipment, the price is bound to decrease. For example, if the guide rail of the table has obvious scratches, uneven wear, etc., it means that the equipment is frequently used and poorly maintained, and its value will be greatly reduced. Accuracy Maintenance: The accuracy of a coordinate grinder is of paramount importance. Through professional testing tools and methods, check whether the positioning accuracy, repeat positioning accuracy and other indicators of the equipment are within a reasonable range. If the accuracy is super poor, the repair cost is high and the price should be reduced accordingly. For high-precision processing needs of users, the accuracy of the second-hand grinding machine does not meet the standard even if the price is low is not appropriate . Functional integrity: check whether the functions of the equipment are normal, such as the operation of the CNC system, the movement of the coordinate axes, the replacement and dressing of grinding wheels. If there is a lack of function or failure, the cost and time required to repair will affect its value, which in turn affects the judgment of the reasonable price. Second, the brand and model Brand influence: used coordinate grinding machines of well-known brands are usually more secure in terms of quality, performance and stability, high market acceptance, and relatively high prices. For example, the Swiss Hauser, the United States Moore and other brands, its technological content and advanced manufacturing process, product durability and reliability, the price in the second-hand market is often higher than the ordinary brand of similar products. Model differences: different models of coordinate grinding machine in the specifications, parameters, processing capacity and other aspects of the differences, thus affecting the price. Generally speaking, the price of large-sized, high-specification equipment is relatively high, but it is also necessary to combine with the actual needs to assess its reasonableness. For example, the Hauser S35-600 has a larger table and a larger grinding diameter than the S35-400, and the price is correspondingly higher. Third, the market situation Market supply and demand: when the supply of used coordinate grinders on the market is greater than the demand, the price tends to fall; conversely, if the supply exceeds the demand, the price will rise. Concerned about market dynamics, to understand the current market supply and demand for used coordinate grinding machines, help to determine whether the price is reasonable. For example, a certain period of time due to a large number of enterprises to upgrade their equipment and sell used coordinate grinding machines, resulting in an oversupply of the market, the price may be relatively low. Comparison of prices of similar equipment: By checking the second-hand equipment trading platform, professional dealers, auctions and other channels, to understand the recent transaction prices of the same brand, the same model, similar age and condition of the second-hand coordinate grinder, as a reference to assess whether the current price of the equipment is reasonable. However, it should be noted that different regions, under different trading conditions, the price may be different. Fourth, the technological upgrading CNC system version: the newer CNC system may be more advantageous in terms of functionality, ease of operation, machining accuracy control, etc. If the CNC system of the used coordinate grinder is not up-to-date, it may be more expensive. If the version of the CNC system of the second-hand coordinate grinder is too old, it may affect its processing efficiency and quality, which in turn affects the price. For example, the new CNC system has automatic compensation function, more friendly programming interface, etc., while the old system requires more manual intervention, the price of the equipment needs to be adjusted according to the actual situation of the CNC system. Technical innovation features: with the continuous development of technology, some new coordinate grinding machines may have unique technical innovation features, such as higher grinding speed, better cooling and lubrication system. In contrast, the lack of these features of the second-hand equipment should be reflected in the price. Five, other factors Transportation and installation and commissioning costs: when buying a used coordinate grinder, you need to consider the cost of transportation as well as installation and commissioning costs. If the location of the equipment is far away, the transportation costs are higher, or the equipment requires professionals to carry out complex installation and commissioning, these additional costs will affect the overall cost of the equipment and the judgment of a reasonable price. After-sales service and guarantee: ask the seller whether to provide after-sales service, such as warranty period, technical support and so on. Good after-sales service guarantee used coordinate grinding machine, the price may be slightly higher, but can reduce worries for the buyer. For example, some sellers provide one year warranty service, while some do not provide any after-sales service, the price should be different.

Selection of suitable used coordinate grinding machine, need to start from the following aspects: First, clear their own needs Processing accuracy requirements: according to the precision level of the parts to be processed, select the appropriate accuracy of the coordinate grinder. For example, if the processing of precision molds, you need to choose a high-precision second-hand coordinate grinder, the machining accuracy can be controlled at the micron level, such as ± 0.001mm - ± 0.005mm between, in order to ensure that the mold dimensional accuracy and surface quality. Processing size range: Measure the maximum size of the parts to be processed to ensure that the table size and stroke range of the used coordinate grinder can meet the processing requirements. Such as the processing of large automotive parts, you need to choose a larger table size, longer stroke of the coordinate grinding machine, table size is generally in the 600mm × 400mm or more, x / y / z-axis stroke in the 500mm × 300mm × 200mm or more. Production volume: If for mass production, should choose a high degree of automation, high productivity of the second-hand coordinate grinder, such as with automatic tool changer, automatic measurement system of CNC coordinate grinder, in order to improve production efficiency and product consistency; if for small batch production or single processing, the degree of automation requirements are relatively low, you can focus on the basic performance of the grinder and accuracy. Second, assess the condition of the equipment (a) Appearance inspection: check the overall appearance of the equipment, check whether there are obvious signs of damage such as collision, deformation, rust and corrosion. Whether the paint on the surface of the equipment is intact, if there is a large area of peeling, may suggest that the equipment has been in a poor working environment or a long service life. (ii) Key components inspection: Spindle: The spindle is the core component of the coordinate grinder, check its rotational accuracy, axial runout and radial runout. Measured with a percentage table and other professional tools, the general requirements of the spindle radial runout does not exceed 0.002mm - 0.005mm, axial runout does not exceed 0.001mm - 0.003mm. At the same time, check the spindle wear, such as spindle taper hole wear, journal wear, etc., if the wear is serious, it will affect the machining accuracy and stability. Guideway: Check the straightness, flatness and wear of the table guideway, grinding wheel holder guideway, etc.. The straightness of the guideway is generally required within 0.005mm/1000mm, flatness within 0.01mm/1000mm. If the guide rail wear is not uniform or obvious scratches, pits, will lead to uneven movement of the table, affecting the machining accuracy. Screw: Check the transmission accuracy, backlash and wear of the screw. Rotate the screw handwheel, feel whether the rotation of the screw is smooth, there is no stagnation phenomenon; with a percentage meter to measure the backlash of the screw, the general requirements of the backlash does not exceed 0.01mm - 0.02mm. If the screw is seriously worn, it will lead to a decline in the positioning accuracy of the worktable. (C) precision testing: if available, you can use professional testing tools to test the geometric accuracy and positioning accuracy of the coordinate grinding machine, such as laser interferometer, ballbar and so on. Testing items include the flatness, straightness and perpendicularity of the table, positioning accuracy of the coordinate axes, repeat positioning accuracy, etc., to ensure that the accuracy indexes meet the processing requirements, the general positioning accuracy should be within ± 0.005mm, repeat positioning accuracy within ± 0.002mm. (d) Wear degree assessment: by checking the use of equipment time, the number and types of workpieces processed, etc., to understand the degree of wear and tear of the equipment. Generally speaking, the use of a shorter period of time, the number of workpieces processed by a small number of second-hand coordinate grinding machine, the degree of wear is relatively light. Third, understand the history of the equipment Use records: Ask the seller about the use of the equipment, including the use of the industry, the type of workpiece processing, the average daily working time, etc., to understand the intensity of use of the equipment and the working environment. Maintenance records: check the maintenance records of the equipment, to understand whether the regular maintenance, replacement of wearing parts. If the equipment has a complete maintenance record, and maintenance work done well, its performance and accuracy is relatively more secure. Maintenance history: to understand whether the equipment has been a major failure, overhaul, etc.. If the equipment has been repaired or overhauled several times, you need to further understand the specific parts of the maintenance and the reasons, to assess the impact on the performance and accuracy of the equipment. Fourth, examine the performance of the equipment Control system: Check the control system of the coordinate grinding machine, to understand whether the operation interface is friendly, whether the function is complete, whether it has online measurement, error compensation and other functions. Currently on the market common numerical control system Siemens, Fanuc, etc., different numerical control system in the stability, precision control, programming convenience and other aspects of the difference. Grinding performance: focus on the grinding wheel speed range, grinding force, grinding efficiency and other indicators. The speed of the grinding wheel is generally between 10000rpm - 30000rpm, the higher the speed, the higher the grinding efficiency, but the higher the quality of the grinding wheel and balance requirements. At the same time, check the stability of the grinding process, whether there is vibration, noise and other abnormal phenomena. Degree of automation: According to the production demand, choose the used coordinate grinder with suitable degree of automation. High degree of automation grinding machine can reduce manual intervention, improve productivity and processing accuracy, but the price is relatively high. Such as automatic loading and unloading device, automatic measurement and compensation system and other functions, can be selected according to the actual situation. Fifth, consider the after-sales protection Technical support: ask the seller or the original manufacturer to provide technical support, including equipment installation and commissioning, operation training, troubleshooting and other services. If there are problems with the equipment, can get professional technical support in a timely manner, to ensure the normal operation of the equipment is critical. Spare parts supply: to understand the supply of spare parts for used coordinate grinding machines, to ensure that when the equipment needs to be repaired, you can purchase the required spare parts in a timely manner. Some imported brands of used equipment may have a longer supply cycle or higher prices for spare parts, so you need to consider this factor in advance.

The price trend of Shadick AQ360L slow walking silk will be affected by various factors such as the market price of new machines and the supply and demand relationship of second-hand equipment market, as follows:1. New machine priceThe Shadick AQ360L belongs to the mid-range model of Shadick slow walking silk, and its new machine price is usually around 700000 to 900000 yuan. However, the specific price may vary depending on the configuration, such as whether it is equipped with special features such as automatic threading and intelligent monitoring system, which may affect the price.2. Second hand priceThe price of second-hand Shadick AQ360L slow walking silk fluctuates greatly, usually between 100000 and 600000 yuan. The following are the impacts of different situations on second-hand prices:-* * Service life and duration * *: Equipment with short service life and short usage duration is relatively expensive. Equipment produced and used less frequently in 2019 may be sold at around 60% -80% of its original price. For devices that have been in use for more than 10 years and have a longer usage time, the price may drop to 20% -40% of the original price. For example, a device produced in 2010 with 45000 hours of usage time may be priced at around 200000 to 300000 yuan.-Equipment condition: If the appearance, internal components, accuracy, and other conditions of the equipment are good, the price may be higher. If there is no obvious damage to the appearance, minimal wear on internal components, and the accuracy can reach ± 0.003mm, the equipment will be about 100000 to 200000 yuan more expensive than equipment with obvious damage and decreased accuracy.-Market supply and demand relationship: When there is a high demand for Shadick AQ360L slow-moving silk in the market but a low supply, the price will rise; On the contrary, the price will decrease. For example, in areas where the mold manufacturing industry is concentrated, if there is a strong demand for the equipment in the short term, its second-hand price may be 100000 to 150000 yuan higher than usual.In the long run, with the continuous advancement of technology and the continuous introduction of new slow wire models, the price of the Shadick AQ360L slow wire, whether it is a new or used equipment, may generally show a downward trend. However, due to its advantages in accuracy, stability, and other aspects, there is still a certain demand in the market, and the magnitude of price decline is relatively stable.

When purchasing second-hand Shadick AQ360L slow walking silk, it is necessary to consider the equipment condition, performance testing, relevant information, etc. to ensure that the purchased equipment meets the requirements and has reliable quality. The specific precautions are as follows:1. Equipment condition inspection-Appearance inspection: Check the appearance of the machine tool for obvious bumps, scratches, paint peeling, and other damages, and whether the body is deformed. Check whether the workbench is flat and free of defects such as wear and tear, as the flatness of the workbench directly affects the machining accuracy.-Internal component inspection: Open the machine tool protective door and electrical cabinet to check whether the internal electrical components and circuits are neat, and whether there are aging, damage, short circuits, and other issues. Check the wear of transmission components such as screws and guide rails. If the screws and guide rails are severely worn, it will lead to a decrease in the positioning accuracy and repeat positioning accuracy of the machine tool. At the same time, check whether there is corrosion, leakage, and other phenomena in the working fluid system components such as the water tank and pump.-* * Accuracy testing * *: Use professional testing tools such as laser interferometers, ball bar instruments, etc. to test key accuracy indicators such as positioning accuracy, repeat positioning accuracy, perpendicularity, parallelism, etc. of the machine tool. Request the seller to provide a precision testing report for the machine tool to understand the accuracy deviation of the machine tool in various coordinate axis directions. You can also observe whether the machining accuracy meets your production needs by actually processing some simple specimens.-System check: Understand whether the version and functions of the control system meet the processing requirements, check whether the buttons, knobs, etc. on the operation panel are sensitive and effective, whether the display screen is clear, and whether there are any display abnormalities. At the same time, check whether the drive system of the machine tool is working properly, whether the motor is running smoothly, and whether there are any abnormal noises and vibrations.2. Performance testing-Cutting speed test: Run some standard cutting programs on the machine tool to observe whether its actual cutting speed matches the performance indicators specified in the equipment manual. If the cutting speed is significantly lower than the standard value, it may be due to problems with the pulse power supply, electrode wire drive system, etc. of the machine tool.-Surface quality testing: Process some specimens with high surface quality requirements, such as mirror molds, and then use tools such as surface roughness measuring instruments to detect the roughness of the processed surface. If the surface roughness does not meet the expected requirements, it may be due to unreasonable discharge parameter settings of the machine tool, poor performance of the working fluid system, or problems with the quality of the electrode wire.-* * Functional integrity testing * *: Test each function of the machine tool one by one, such as automatic threading function, multiple cutting function, taper machining function, etc., to ensure that all functions can operate normally. Check whether the accessories of the machine tool are complete, such as fixtures, electrode wire reels, filters, etc., and confirm the quality and applicability of these accessories.3. Equipment history and usage-* * Duration and frequency of use * *: Inquire about the age and average daily usage of the equipment to understand the approximate degree of wear and tear. Generally speaking, equipment with shorter service life and lower frequency of use has relatively less wear on its components, and the overall performance of the equipment will also be better.-* * Maintenance Record * *: The seller is required to provide detailed maintenance records to understand the types of equipment failures, repair locations, and repair times that have occurred in the past. Through maintenance records, it is possible to determine whether there are any hidden faults in the equipment that are difficult to solve, as well as whether the maintenance and upkeep of the equipment are timely and in place.-* * Processing object * *: Understand the material types, workpiece shapes, and precision requirements that the equipment mainly processed before. If the equipment has previously processed workpieces with high hardness and complex shapes, and requires high machining accuracy, the wear of the equipment may be relatively large, and the performance and accuracy of the equipment need to be checked more carefully.4. Transaction related matters-* * Price Evaluation * *: Before purchasing, consult professional equipment evaluation agencies or personnel by consulting the price information of similar second-hand equipment in the market, and make a reasonable evaluation of the price of the equipment to avoid buying at a high price.-Contract Signing: Sign a detailed purchase contract that specifies the model, configuration, price, delivery time, after-sales service, and other terms of the equipment. Specify the acceptance criteria and methods for the equipment in the contract, as well as the solutions for any problems that may arise during the acceptance process.-* * After sales service * *: Understand whether the seller can provide after-sales service for a certain period of time, such as equipment installation and commissioning, training, troubleshooting, etc. Inquire about the response time and service fees of after-sales service to ensure timely and effective support in case of equipment problems. In addition, it is best to choose a seller with a certain reputation and word-of-mouth when purchasing second-hand equipment. If necessary, the seller can be required to provide relevant documents such as the original purchase invoice and certificate of conformity of the equipment to ensure its legality and reliable source.

The following are the daily maintenance and upkeep methods for the Shadick AQ360L slow walking wire:1. Daily maintenance-Machine tool cleaning**-Clean up chips, dust, and oil stains around the workbench and machine tool to maintain a clean working environment.-Wipe the appearance of the machine tool, including the body and operation panel, with a clean soft cloth to prevent dust and oil stains from accumulating.-Inspection of electrode wire system**-Check if the tension of the electrode wire is normal, and adjust it promptly if there are any abnormalities.-Check the loss of the electrode wire. If the loss is too large, consider replacing the electrode wire to ensure machining accuracy and surface quality.-Clean the electrode wire guide, remove any attached impurities, and ensure smooth operation of the electrode wire.-* * Inspection of working fluid system**-Check the liquid level of the working fluid, add the working fluid in a timely manner, and ensure that the liquid level is within the normal range.-Observe the cleanliness of the working fluid. If turbidity or impurities are found in the working fluid, it should be replaced or filtered in a timely manner.2. Weekly maintenance-Filter inspection and replacement**-Check the filtration effect of the working fluid filter. If the filtration speed significantly decreases or the filter is clogged, the filter element should be replaced in a timely manner.-Clean the filter housing to prevent impurities from accumulating.-Inspection of guide wheels and bearings**-Check the wear condition of the guide wheel. If there is wear or uneven surface, the guide wheel should be replaced in a timely manner to avoid unstable electrode wire routing and affect machining accuracy.-Check the operation of the bearings. If there is any abnormal noise or jamming, replace the bearings in a timely manner.3. Monthly maintenance-Electrical system inspection**-Check whether the connections of each electrical component are firm, whether there are any looseness, oxidation, etc. If necessary, tighten and clean them.-Clean the dust inside the electrical cabinet to prevent excessive dust from affecting heat dissipation and electrical performance.-Lubrication of screw and guide rail**-Lubricate and maintain the screw and guide rails of the machine tool, apply an appropriate amount of lubricating oil to ensure smooth movement and reduce wear.-Check the wear of the screw and guide rail. If there is any abnormal wear, timely measures should be taken to repair or replace them.4. Regular maintenance (six months or one year)-Accuracy check and adjustment**-Regularly check the accuracy of the machine tool, such as the positioning accuracy, perpendicularity, parallelism, etc. of the X, Y, and Z axes. Professional testing equipment such as laser interferometers and ball bar instruments can be used for inspection.-According to the test results, adjust and calibrate the machine tool accordingly to ensure that the machining accuracy of the machine tool always remains within the specified range.-Replace vulnerable parts**-According to the usage of the machine tool, preventive replacement should be carried out on some vulnerable parts, such as electrode wire tension sensors, water nozzles, etc., to ensure the normal operation and processing quality of the machine tool.-Inspect the sealing components of the machine tool and replace them promptly if they are aged or damaged to prevent leakage of the working fluid.