Select the Sardick spark machine model that suits your needs, you can refer to the following methods: First, clear processing needs Machining accuracy: If the machining accuracy requirements are extremely high, such as the manufacture of precision molds, aerospace components, etc., you can choose models such as AQ35L, AP3L, etc., these models are equipped with high-precision positioning system and advanced discharge control technology, capable of realizing micron-level or even higher precision machining. Processing size: According to the size of the commonly processed workpiece to determine the table stroke of the spark machine and the maximum overhanging mass of the electrode and other parameters. For example, when machining large molds, you can choose AG60LS, AL60G and other table size and stroke larger models; if the main processing of small precision parts, the AD32Ls, AD35L and other models may be more appropriate. Processing speed: for mass production and processing speed requirements, such as automotive parts processing, etc., you can choose models with high-speed electrical discharge machining capabilities, such as AD35L, AL60G, etc., which are equipped with high-performance power supply and advanced discharge circuit, can effectively improve processing efficiency. Second, consider the budget Purchase of new equipment: The prices of different models of SADIC spark machines vary greatly, with new high-end models such as the AL60G being relatively expensive, while basic models such as the AD32Ls are relatively affordable. In the case of a limited budget, it is necessary to consider the balance of performance and price, and choose a cost-effective model. Used equipment purchase: Shadick spark machine prices on the second-hand market is usually much lower than the new equipment, but pay attention to the equipment's service life, wear and tear and maintenance records, such as second-hand AD32Ls, LN1 and other models are more common, the purchase of the need to be careful to assess its performance and quality. Third, pay attention to machine performance Electrode loss rate: Electrode loss directly affects the cost and efficiency of machining, some models such as the AL60G equipped with the latest discharge control technology “Arc-less 4” circuit, which can reduce the electrode consumption to the limit, effectively reduce electrode loss, improve machining accuracy and surface quality. Surface roughness: The surface roughness after machining varies from model to model. For example, the AP3L's “SUPERSVC” circuit suppresses unevenness in surface roughness, resulting in high-quality dull or mirror surfaces in a short period of time, which makes it suitable for machining tasks that require high surface quality. Degree of automation: If you need to realize automated production, you can choose a model that supports automation functions, such as the AD35L can be installed with an in-line shuttle ATC, and also supports automation configurations such as ATC for large electrodes, and the operator interface has been added to the gadget function, which improves production efficiency and ease of operation. Fourth, understand the after-sales service Technical support: As a famous brand, Shadecar's official after-sales service is usually more complete, but the technical support capacity of different regions and dealers may vary. When choosing a model, you can learn about the technical strength and response speed of local dealers or after-sales service centers to ensure that problems encountered in the process of use can be solved in a timely manner. Parts supply: consider the availability and price of parts, some common models of parts easier to obtain, and the price is relatively stable, while some special models of parts may be longer supply cycle or higher prices, which will affect the cost of repair and maintenance of equipment and downtime. Fifth, reference to user reviews and cases User reputation: through the network search, industry forums, peer-to-peer exchanges, etc., to understand the different models of Shadick spark machine user evaluation and use of feedback, including the stability of the equipment, reliability, machining accuracy of the maintenance of the information, so as to have a more comprehensive understanding of the actual performance of each model. Successful cases: View the successful cases provided by Shadick or distributors to understand the application of each model in different industries and processing areas, as well as the processing results and economic benefits achieved, in order to provide reference for choosing the model that suits their needs.

The following are some ways to improve the machining accuracy of Sardick spark machine: First, the selection and preparation of electrodes Selection of electrode materials: according to the processing requirements of the selection of suitable electrode materials, such as copper electrode conductivity is good but relatively large loss, graphite electrode loss is small but the processing of the surface quality may be slightly poor, tungsten-copper and silver-tungsten alloy and other composite materials, the overall performance is better, according to the specific object of the processing and precision requirements of the trade-offs between the choice. Ensure the precision of electrode: the manufacturing precision of electrode should be higher than the precision of workpiece, the manufacturing tolerance is usually taken as about 1/2 of the tolerance of workpiece, including dimensional accuracy, shape accuracy and surface roughness, etc., should be strictly controlled. Optimization of electrode design: the design of electrodes should take into account the discharge gap, chip removal, heat dissipation and other factors, reasonable electrode shape and structure to help improve machining accuracy and stability, such as the use of multi-electrode machining, electrode flattening and other ways to improve the machining effect. Second, optimization of processing parameters Accurate control of pulse parameters: reasonable selection of pulse width, peak current and other pulse parameters, in general, reduce the pulse width and peak current can reduce the surface roughness, improve machining accuracy, but will correspondingly reduce the machining speed, according to the specific requirements of the machining in the balance between precision and efficiency. Stable discharge gap: maintain the stability of the discharge gap is critical to the machining accuracy, can be achieved by adjusting the electrical parameters of the pulse power supply, optimize the servo control system, etc., at the same time to pay attention to the secondary discharge caused by the corrosion products on the discharge gap, clean up the corrosion products in a timely manner. Reasonable setting of servo reference: According to the electrode material, workpiece material, machining depth and other factors, reasonable setting of servo reference to ensure that the electrode and the workpiece between the discharge state is stable, to avoid the decline in machining accuracy due to improper setting of servo reference. Third, the management of working fluid Select the appropriate working fluid: different working fluids have different insulation properties, cooling performance and chip removal performance, should be based on the processing requirements and electrode materials to select the appropriate working fluid, for example, in the finishing process, you can choose a lower viscosity, good insulation performance of the working fluid, in order to obtain a better machining surface quality. Keep the working fluid clean: Replace the working fluid and filter paper core regularly to prevent the impurities in the working fluid and the products of galvanic corrosion from affecting the machining accuracy, and it is generally recommended that the filter paper core be replaced when the pressure is less than 0.18Mpa. Optimize the working fluid flushing method: according to the processing shape and requirements, choose the appropriate flushing method, such as side flushing, bottom flushing or circular flushing, etc., to ensure that the products of galvanic corrosion can be discharged in a timely manner, and the temperature of the processing area is uniformly distributed, to avoid uneven flushing resulting in machining accuracy problems. Fourth, workpiece clamping and positioning Ensure clamping accuracy: the use of high-precision fixtures and clamping methods to ensure that the workpiece will not be displaced and vibration in the process of machining, the clamping force should be moderate, not only to ensure that the workpiece is firmly fixed, but also can not cause deformation of the workpiece, affecting the machining accuracy. Accurate positioning methods: the use of appropriate positioning reference and positioning tools, such as edge finder, tool setting instrument, etc., to improve the positioning accuracy of the workpiece, the positioning error should be controlled within the allowable range to ensure the consistency and accuracy of the machining dimensions. Fifth, the maintenance of machine tools and maintenance Regularly check the accuracy of the machine: Regularly check and adjust the accuracy of the key components of the Shadick spark machine, such as the axes guideway and ballscrew, to ensure that the precision of the machine's axis movement, table flatness, spindle perpendicularity and other indicators to meet the requirements, it is generally recommended to inject lubricating oil into the machine tool axes guideway and ballscrew every three months. Keep the machine clean and stable environment: keep the machine body and table clean, to prevent oil, chips and other debris into the machining area, affecting the machining accuracy, and at the same time pay attention to the temperature and humidity control of the machining environment, to avoid too large a difference in temperature leading to deformation of the machine tool, affecting the machining accuracy. Timely maintenance and replacement of components: found that the machine parts are worn or damaged, should be timely maintenance or replacement, such as electrode chuck, wire and other parts of the damage will affect the transmission of discharge energy and machining accuracy, must be dealt with in a timely manner.

The following are some of the factors that will affect the machining accuracy of Sardick spark machine: First, the electrode factors Electrode materials: different electrode materials have different physical properties, such as copper electrode conductivity is good but relatively large loss, graphite electrode loss is small but the processing surface quality may be slightly worse, the choice of electrode materials will affect the processing accuracy. For example, in the processing of some high-precision molds, according to the requirements of the mold and the material characteristics of the choice of the appropriate electrode material. Electrode precision: the manufacturing precision of the electrode is directly related to the machining accuracy, if the electrode itself is not up to the standard size tolerance, shape accuracy, then the precision of the processed workpiece will also be affected. Generally speaking, the manufacturing tolerance of the electrode should be controlled at about 1/2 of the tolerance of the workpiece. Electrode loss: In the process of spark machine machining, the electrode will produce loss due to discharge, uneven electrode loss will lead to a decline in machining accuracy. For example, in the processing of corners, edges and other raised position, the electric field strength is higher, the electrode loss is faster than the flat position, thus affecting the shape of the workpiece precision. Processing parameters Pulse width and peak current: increasing the pulse width and peak current will increase the individual pulse energy, which will lead to an increase in the roughness value of the machined surface, affecting the machining accuracy. However, if you want to improve the processing speed, often need to correspondingly increase the current, which requires a balance between the processing speed and accuracy. Discharge gap: the size of the discharge gap and its consistency has an important impact on the machining accuracy. Discharge gap is too small, easy to produce arc, short circuit and other abnormal discharge phenomena, damage to the electrode and the workpiece, affecting the machining accuracy; discharge gap is too large, it will make the processing of dimensional deviation increases. In addition, the secondary discharge caused by galvanic corrosion products will also affect the stability of the discharge gap, which in turn affects the machining accuracy. Servo base: servo base set unreasonable will lead to electrode and workpiece discharge between the state is not stable, affecting the machining accuracy. Third, the working fluid factors The type and performance of the working fluid: different working fluids have different insulation properties, cooling performance and chip removal performance, choose the right working fluid can improve machining accuracy. For example, in finishing, the need to use a lower viscosity, good insulation properties of the working fluid, in order to obtain a better machining surface quality. The degree of contamination of the working fluid: the dirtier the working fluid, the more opportunities for secondary discharge, which will lead to an increase in the number of electrode liftback, so that the machining slope increases, affecting the machining accuracy. Fourth, the workpiece factors Workpiece materials: different workpiece materials have different electrical conductivity, coefficient of thermal expansion and other physical properties, these properties will affect the machining accuracy of the spark machine. For example, some of the high hardness, high strength materials are more difficult to process, easy to produce cracks and deformation, affecting the machining accuracy. Workpiece clamping and positioning: workpiece clamping and positioning accuracy directly affects the machining accuracy, if the workpiece is not firmly clamped or positioning inaccurate, displacement and vibration will occur during the machining process, resulting in reduced machining accuracy. Fifth, equipment factors The precision and rigidity of the machine tool: the precision and rigidity of the Shadick spark machine itself is the basic factor affecting the machining accuracy. If the machine's coordinate axis movement accuracy is not high, the table flatness is not good, the spindle verticality deviation, etc., will lead to reduced machining accuracy. Control system: Advanced control system can realize more precise machining control, such as precise electrode feed control, discharge energy control, etc., so as to improve machining accuracy. If the performance of the control system is not good, there will be control errors, affecting the machining accuracy. Temperature and humidity: Changes in ambient temperature and humidity will affect the precision and stability of the machine tool, which in turn affects machining accuracy. For example, the deformation of cast iron at a temperature difference of 1°C is about 1.1μm/m. Excessive humidity will affect the life of the circuit boards in the machine. Vibration: Vibration during machining will make the discharge state between the electrode and the workpiece unstable, resulting in obvious line marks, affecting the machining accuracy.

The performance and accuracy of Shadick spark machines are at a higher level in the industry, the following is a detailed introduction: First, performance High processing precision: the processing precision of Shadick spark machine is extremely high, the dimensional accuracy can be controlled at ± 0.005mm or even higher, which can meet the strict precision requirements for molds and precision parts, for example, in the field of optical parts, precision connectors and other areas of extremely high dimensional accuracy requirements have excellent performance. High processing efficiency: Equipped with high-performance discharge power supply and advanced processing circuit, the discharge energy utilization rate is high, the processing speed is fast, which can effectively shorten the processing time and improve the production efficiency. For example, when processing large-area, porous and high hardness materials, its efficiency advantage is more obvious than other ordinary spark machines. Good surface quality: through the optimization of discharge parameters and processing technology, can obtain good processing surface quality, low surface roughness, some models can even reach the mirror effect, without the need for subsequent polishing treatment, saving processing time and cost, especially suitable for molds and parts with high requirements for surface quality processing. High degree of automation: with automatic electrode exchange device, automatic liquid level adjustment function, automatic monitoring of the processing process and compensation function, etc., can realize unmanned high-precision machining, improve the production efficiency and quality of machining, reduce labor costs and labor intensity. Wide range of adaptability: it can process a variety of conductive materials, including cemented carbide, hardened steel and other difficult-to-machine materials, and can also process deep and fine holes, shaped holes, deep grooves, narrow slits, and other complex shapes of the parts, the adaptability of the processing of different shapes and materials, and has been widely used in the mold manufacturing, aerospace, medical equipment and many other industries. Strong stability: the use of high-quality mechanical structure and advanced control system, the stability and reliability of the machine tool is high, and it can run stably for a long time, reducing the production delays and quality problems caused by equipment failure. Second, precision High repetitive positioning accuracy: Generally, the repetitive positioning accuracy of Shadick spark machine can reach 2μm, which ensures that the positioning accuracy of the workpiece is always maintained at a high level during multiple machining processes, thus guaranteeing the consistency and stability of the machining dimensions. High accuracy of straightness and perpendicularity: the coordinate axes of the machine tool have good straightness and perpendicularity in the process of movement, which makes the machined parts more accurate in shape and size, and it is especially important for the machining of molds and parts that need to ensure the accuracy of shape. High precision of discharge gap control: the discharge gap between the electrode and the workpiece can be precisely controlled, generally between 0.1-0.01mm, thus realizing high-precision machining dimensional control and ensuring the machining precision and surface quality.

Shadick spark machine is a kind of high-performance EDM machine tool produced by Shadick Company in Japan, which is widely used in mold making and other fields: I. Features High-precision machining: Shadick spark machine adopts advanced technology and precise mechanical structure, which can realize high-precision machining. For example, the machining accuracy of some of its models can be controlled within ± 0.001mm, which can meet the processing needs of industries with extremely high requirements for mold accuracy, such as electronics, optics and other fields. High machining efficiency: Equipped with a high-performance discharge power supply and advanced machining circuits, it is possible to improve the utilization of discharge energy and accelerate machining speed. For example, the AL60G model adopts the newly developed “SP power supply” and related new control technology and new circuits, resulting in significant improvements in processing speed and quality. Good surface quality: By optimizing the discharge parameters and processing technology, good surface quality can be obtained, reducing surface roughness, and some models can even achieve mirror effect without subsequent polishing treatment, saving processing time and cost. High degree of automation: Equipped with automatic electrode exchange device, automatic liquid level adjustment function, automatic monitoring and compensation function of the machining process. Take the high-speed automatic threading device as an example, it can realize high-precision processing under unmanned operation, which improves the production efficiency and processing quality. Linear motor drive technology: Some high-end models adopt linear motor drive, such as AL series, ALN800G, etc. Compared with the traditional ball screw drive, it has higher response speed, better followability and higher positioning accuracy, and it can realize more stable and precise machining motion control. Common models and parameters 1、AL60G : Stroke of each axis: X×Y×Z is 600x420x370mm; Maximum overhang: 50kg; Maximum workpiece weight: 1500kg; Machine body size: W×L×H is 1740x2785x2570mm; Equipped with: linear motor drive, “SP power supply”, “Arc-less 4” circuit and machining auxiliary function “LN Pro AI”. 2、ALN800G Stroke of each axis: X-axis 800mm, Y-axis 600mm, Z-axis 500mm; Features: Suitable for large-size, high-plate-thickness machining, the machine is equipped as standard with an automatic three-sided upper and lower machining chute that supports 500 mm plate thickness impregnation machining, and a ceramic-based “mouth-shaped” workpiece holder, etc., which enables continuous, unmanned operation for high-speed, high-precision machining. VN400Q : Stroke of each axis: X-axis 400mm, Y-axis 300mm, Z-axis 230mm; Features: Entry-level linear motor-driven WEDM machine, standardly equipped with tension servo function, automatic threading device, precision thermal displacement correction function, etc., and the processing assistant system “Heart-NC” with easy programming function, suitable for beginners, and low energy consumption. Application Fields Mold Manufacturing: It is used to process various molds, such as injection molds, die-casting molds, stamping molds, etc. It can make complex shapes of cavities and cores, improve the precision and quality of the molds, and prolong the service life of the molds. Precision parts processing: capable of processing various precision parts, such as aerospace parts, medical equipment parts, electronic components, etc., to meet the requirements of these fields on the parts of high-precision, high-performance. Special processing: For materials and shapes that are difficult to process by traditional processing methods, such as carbide, hardened steel, deep and fine holes, shaped holes, deep grooves, narrow slits, etc., Shadick spark machines have unique processing advantages, which can realize efficient and precise processing.

The following are some of the factors that will affect the price of a used spark machine: First, the brand and model Well-known brands: such as Switzerland Charmilles, Japan Shadick, Makino, Mitsubishi and other brands, because of its outstanding performance in technology research and development, manufacturing process, product performance and stability, market acceptance is high, so the second-hand price is also relatively high. For example, a second-hand Charmilles FORM20 with powder mixing function of the mirror spark machine price of about 11 million yuan, while the general brand of similar models of second-hand spark machine prices will be much lower. High-end models: Usually have more advanced features, higher machining accuracy and efficiency, and are priced much higher than low-end and mid-range models. For example, Shadick's high-end mirror spark machine series, its price is several times more expensive than ordinary spark machine. Second, the use of life and the degree of old and new Short service life: the degree of wear and tear of the equipment is relatively small, the performance and accuracy of the components to maintain better, the price will be relatively high. General use of 1-3 years of second-hand spark machine, the price may be about 60% -80% of the price of the original equipment. Appearance and internal color is good: the appearance of the equipment without obvious scratches, paint, internal electrical components, mechanical transmission components, etc., no serious signs of aging, damage, close to the new state of the second-hand spark machine, the price will be 10-30% higher than the same type of equipment, but the color of the poorer equipment. Third, the configuration and function High configuration components: equipped with high-precision electrode fixture, advanced numerical control system, high-performance discharge power supply and other key components of the spark machine, processing accuracy and efficiency is higher, the price will be raised accordingly. For example, the second-hand price of a spark machine with a high-precision ball screw drive is more expensive than that of a spark machine with an ordinary screw drive. Special functions: With some special processing functions, such as powder mixing function, microfabrication function, five-axis linkage processing function of the spark machine, because it can meet the specific processing needs, the second-hand price will be higher than the ordinary function of the spark machine. Like Charmilles F053HSFS model spark machine, with powder mixing function, the second-hand price will be affected by this function. Fourth, processing accuracy and performance High precision: high precision spark machine, such as can reach ± 0.001mm or even higher precision equipment, more favored in the second-hand market, the price will be higher than the general accuracy of the equipment. Because the high precision spark machine for processing precision molds, high-end parts and other important significance, can create higher value for the user. High processing efficiency: fast processing speed, low electrode loss, good surface quality of the spark machine, its second-hand price will be relatively high. For example, some of the use of advanced discharge technology and optimized processing parameters of the spark machine, to ensure that the processing accuracy at the same time, significantly improve the processing efficiency, the second-hand price of this type of equipment will be higher than the ordinary efficiency of the spark machine about 20% -50%. V. Market supply and demand Market demand: when the market demand for used spark machines is greater than the supply, prices tend to rise. For example, in the peak season of the mold manufacturing industry, the demand for spark machines increases, and the price of used spark machines will also rise. Rare models: some discontinued or limited production of rare models of spark machine, due to the scarcity of the number of market, and a specific user group has a demand for it, so the price will be raised. Sixth, the maintenance records of the equipment Complete records: there are detailed, standardized maintenance records of the second-hand spark machine, that the equipment in the use of the process of getting a better maintenance and management, its performance and life is more secure, the price will be relatively high. Regular maintenance: If the equipment can be regularly maintained in accordance with the manufacturer's requirements, replacement of wearing parts, etc., its second-hand price will be higher than the lack of maintenance of the equipment by about 10% -20%.

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.