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Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. has continuously participated in the China Import and Export Fair (Canton Fair) since 2001. As a company specializing in manufacturing CNC machine tools, the company has been committed to technological innovation and product quality improvement, and has continuously expanded domestic foreign market.   At this year's Canton Fair, Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. once again demonstrated its latest research and development of high-performance CNC machine tool products. These products adopt the most advanced technology and materials, feature high precision, high efficiency and high stability, and are widely praised by customers at home and abroad.   During the exhibition, the company's booth attracted the attention of many visitors and buyers. The company's sales team actively communicates and negotiates with customers, introducing the features and advantages of the products in detail. At the same time, the company also demonstrated some actual processing effects, allowing customers to see with their own eyes the high precision and stability of the product. Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. stated that it will continue to adhere to the business philosophy of "technological innovation, quality first, customer first", continuously improve product research and development capabilities and production process levels, and provide customers with better products and services. At the same time, the company will also actively participate in domestic and foreign exhibitions and exchange activities to expand a broader market space.   By participating in the Canton Fair, Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. once again demonstrated its leading position and technical strength in the CNC machine tool industry. I believe that with the company's continuous efforts, it will be able to achieve more brilliant achievements in the future and make greater contributions to the development of China's manufacturing industry.

In manufacturing, an efficient belt grinder is an essential tool. Recently, an innovative CNC belt abrasive belt grinder came out, which aroused widespread attention and sensation in the industry. Developed by a leading mechanical equipment manufacturer, this CNC belt grinding machine adopts the latest computer numerical control technology to provide manufacturers with more efficient and precise sanding solutions. The unique feature of this equipment is that it can automatically adjust the speed, pressure and position of the abrasive belt through the preset program to adapt to the needs of different workpieces. This CNC belt grinder has a number of significant advantages over traditional manual belt grinders. First, it enables a high degree of automation, reducing the need for manual operations and increasing production efficiency. Secondly, due to the adoption of numerical control technology, the equipment can precisely control the movement trajectory and pressure of the abrasive belt, thereby achieving a finer sanding effect. In addition, the device also has an intelligent self-inspection function, which can automatically detect the wear degree of the abrasive belt, and remind the user to replace the abrasive belt in time, prolonging the service life of the equipment. The introduction of this CNC belt abrasive machine was an important breakthrough for the manufacturing industry. It not only improves production efficiency and product quality, but also reduces labor costs and equipment maintenance costs. In addition, it also provides manufacturers with more flexibility and innovation space to meet the processing needs of different workpieces. The equipment has been tested in some well-known manufacturing companies and has received very high evaluation. According to relevant sources, the market response of the device has been very positive and it is expected to gain popularity rapidly in the short term. All in all, the CNC belt abrasive machine is a revolutionary tool that has brought about a huge change in the manufacturing industry. Its high degree of automation, precise control and intelligent functions make it an ideal choice for manufacturers to improve production efficiency and product quality. With its market popularity, we have reason to believe that this equipment will bring more opportunities and development space for the manufacturing industry.

Recently, a wire cutting machine called DK7755 has attracted widespread attention in the global manufacturing industry. This innovative product was developed by a well-known machinery and equipment manufacturing company and has been successfully launched on the market. DK7755 wire cutting machine has brought great changes to the manufacturing industry with its high efficiency, precision and reliability. DK7755 wire cutting machine adopts advanced numerical control technology and high-precision wire cutting technology, which can realize precise cutting of various metal materials. Whether it is steel, aluminum alloy or copper and other materials, the DK7755 wire cutting machine can easily handle it. Its high-speed cutting and high-precision positioning capabilities greatly improve production efficiency and product quality, and provide strong support for the manufacturing industry. Compared with traditional cutting equipment, DK7755 wire cutting machine has many unique advantages. First of all, it adopts an advanced automatic control system, which can realize fully automatic operation, greatly reducing the need for manual operation and reducing labor costs. Secondly, the DK7755 wire cutting machine has an intelligent cutting program, which can be automatically adjusted according to different materials and cutting requirements, ensuring the best balance between cutting quality and efficiency. In addition, the equipment is also highly flexible and can meet the cutting needs of different specifications and shapes, providing more choices and possibilities for the manufacturing industry. It is understood that DK7755 wire cutting machine has been widely used in many manufacturing fields. Whether it is automobile manufacturing, aerospace, electronic equipment or mold manufacturing, the DK7755 wire cutting machine can play an important role. It can not only cut high-precision parts and molds, but also realize the cutting of complex shapes, providing more innovation space and competitive advantages for the manufacturing industry. With the continuous progress of science and technology and the rapid development of manufacturing industry, DK7755 wire cutting machine will become the new favorite of manufacturing industry. Its appearance not only brings more efficient and precise cutting solutions to the manufacturing industry, but also provides strong support for the transformation and upgrading of the manufacturing industry. It is believed that in the near future, DK7755 wire cutting machine will become the standard equipment in the manufacturing industry, and promote the manufacturing industry to move towards the direction of intelligence and efficiency.

Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. participated in the Canton Fair to display the latest CNC machine tool technology The Canton Fair is one of the largest international trade fairs in China, attracting exhibitors and buyers from all over the world. This year, Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. participated in the Canton Fair with the latest CNC machine tool technology, attracting a large number of buyers and visitors. Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. is an enterprise specializing in the research, development, production and sales of CNC machine tools, with independent intellectual property rights and patented technologies. The company exhibited the latest CNC machine tool products at the Canton Fair, including CNC lathes, CNC milling machines, CNC grinding machines, etc. It is reported that the company's CNC machine tools have the characteristics of high precision, high efficiency and high stability, and are widely used in automobiles, aviation, aerospace, machinery manufacturing and other fields. At the exhibition site, the company's engineers introduced the technical characteristics and application fields of CNC machine tools to the audience in detail, which was highly praised and concerned by the audience. Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd., as a professional CNC machine tool manufacturer, has been committed to providing customers with the best quality products and services. The purpose of participating in the Canton Fair is to expand the international market, increase brand awareness, further promote and apply CNC machine tool technology, and provide better service and support for global customers. Through this participation in the Canton Fair, Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. not only demonstrated the latest CNC machine tool technology, but also further expanded the international market, injecting new impetus into the development of the enterprise.

Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd. recently announced that the company has successfully developed a new CNC machine tool product, which will provide more efficient, accurate and stable processing services for domestic and foreign customers. It is reported that this CNC machine tool product adopts the most advanced CNC technology and high-precision machine tool structure design, which can meet the processing needs of various complex parts. At the same time, the product also has an intelligent operation interface and a rich processing program library, providing users with a more convenient and efficient operation experience. Taizhou Jiangzhou CNC Machine Tool Manufacturing Co., Ltd., as a leading enterprise in the domestic CNC machine tool manufacturing industry, has been committed to technological innovation and product upgrading. The new products launched this time not only have leading technical level and high-quality processing performance, but also will further enhance the company's competitiveness and influence in the market. According to the relevant person in charge of the company, the product has passed strict testing and quality inspection, and has started mass production. The company will provide customers with better processing solutions with more high-quality products and services, and make greater contributions to the development of the domestic CNC machine tool manufacturing industry.

Recently, an advanced device named "Intelligent Wire Cutting Machine" was officially launched in China. This equipment adopts the latest digital control technology and advanced cutting technology, which can realize high-precision and high-efficiency wire cutting. It is understood that this equipment is mainly used for cutting various metal materials, such as steel, aluminum, copper and so on. According to the equipment manufacturer, the intelligent wire cutting machine adopts advanced numerical control technology, which can achieve high-precision cutting. At the same time, the equipment is also equipped with a high-speed motor and a precision transmission system, which can achieve high-efficiency cutting. In addition, the intelligent wire cutting machine also has an intelligent operation interface, which is easy to operate and can greatly improve work efficiency. It is reported that the intelligent wire cutting machine has been widely used in many domestic enterprises and has been well received by users. This equipment can not only improve production efficiency, but also greatly reduce production costs, bringing huge economic benefits to enterprises. In the future, the intelligent wire cutting machine will continue to carry forward its own advantages, continue to innovate, and provide more high-quality and efficient cutting solutions for domestic and foreign enterprises.

We all know that the development of wire cutting is a blessing and a driving force in the processing industry. The development of the wire feeder has greatly improved the efficiency of the processing industry and reduced the cost of use. At the same time, the development of the processing industry is also a boost to the development of wire cutting machine tools, and their relationship is mutual and indistinguishable. Wire EDM is divided into slow wire cutting, fast wire cutting and medium wire cutting. Among them, the development of the wire-feeding machine tool is inseparable from the development of the sheet metal processing industry, that is to say, the formation and development of sheet metal processing has increased the development of the manufacturing industry. In recent years, the advanced manufacturing industry has attracted everyone's attention. Therefore, my country's sheet metal industry can develop rapidly, with an annual growth rate of 11-15%. This data shows that the sheet metal industry has surpassed other manufacturing industries. In the sheet metal processing industry, the application of numerical control technology is becoming more and more extensive, such as wire EDM, EDM punching machine, EDM forming machine, etc., and the high precision and high efficiency of wire EDM are necessary for sheet metal processing. indispensable.

In modern industries such as motors, household appliances, building materials, metallurgy, machinery, light industry, and manufacturing, wire EDM is used. It can be seen that the scope of application of wire cutting is very extensive. The development of WEDM has also changed from the earliest slow-moving wire-cutting to fast-moving wire-cutting and medium-moving wire-cutting. These three types of wire-cutting machine tools are the most used in modern industry. It can also be said that wire-cutting machine tools can be divided into There are three categories, each with their own advantages and disadvantages. In the cutting process, the middle wire feeder has one more trimming function than the fast wire feeder, which can make the surface of the workpiece smoother, which is why the precision of the middle wire feeder is higher than that of the fast wire feeder. Compared with the slow wire cutting, the medium wire cutting saves more electrode wire. Therefore, for these reasons, the wire cutting machine has become an inevitable trend, and at the same time, customers have increasing requirements for molds, which is also the reason why the wire cutting machine has become a must for customers. Here I will briefly introduce the industries in which the wire-feeding machine tools are used. For example: 1. Electronic parts, electrical cabinets, punching and other electrical machinery industries; 2. Refrigerator, washing machine, TV and other household appliances industries; 3. Building materials industries such as aluminum extrusion molds; 4. Metallurgical industries such as carbide die-casting molds 5. Machinery industries such as medical equipment and construction machinery; 6. Light industries such as sewing machines and bicycle parts; 7. Manufacturing industries such as shape blanking, punching, and forming dies.

There are two control methods for the more common wire cutting machine tools on the market, one is servo control and the other is stepping control. What is the difference between these two control methods? Today we will introduce to you the differences between the two control methods of wire cutting. 1. Different low frequency characteristics The motor of step wire cutting is prone to low frequency vibration at low speed, while the servo wire feeder machine runs very smoothly without vibration. This is because the stepper motor uses damping technology to overcome low-frequency vibration, while the AC servo system has a resonance suppression function, and the system has a frequency analysis function (FFT), which can detect the mechanical resonance point and facilitate system adjustment. 2. Different moment-frequency characteristics The output torque of the wire-feeding motor in the stepper decreases with the increase of the speed, while the motor of the wire-feeding wire cutting in the servo is a constant torque output. At the same time, the stepping wire cutting machine will drop sharply at a higher speed, and its maximum working speed is 300-600RPM, while the speed of the wire in the servo is within 2000 or 3000RPM.

Some time ago, we talked about the difference between servo control and stepping control of wire cutting machine tools, which are the difference in low frequency characteristics and the difference in torque frequency characteristics. Today we will talk about the difference between servo control and stepping control of wire cutting machine tools. place. 3. Different operating performance Stepping wire cutting machine tools generally use open-loop control. When the frequency of wire cutting in the middle is too high, the load is too large, and the speed is too high when stopped, the middle wire is prone to lost steps or overshoot. Servo wire cutting machine tools rarely have these phenomena, because the servo wire cutting machine tool is closed-loop control, and the driver of the machine tool directly samples the feedback signal of the motor encoder, so that there is little lost step or overshoot. Fourth, the speed response performance is different Compared with the acceleration performance of the stepping wire cutting machine and the servo wire cutting machine, it takes 200 to 400 milliseconds for the stepping type to accelerate from standstill to the working speed, while the servo machine tool only needs a few milliseconds to accelerate from standstill to its rated speed. (Panasonic AC servo motor is taken as an example here). It can be seen from this that the servo type medium wire travel is more suitable for the control occasions that require quick start and stop.

"Broken wire" is a situation that is often encountered in the work of online cutting machine tools, and at this time, "broken wire protection" plays an important role. If the wire EDM breaks, the relay of the wire cutting in the middle will automatically disconnect and cut off the power supply. There is a conductive block in the middle of the wire-cut upper wire frame, which is linked to the same set of switch contacts with another conductive block of the wire frame. At the same time, it is also connected in parallel with the "broken wire protection" switch on the button plate. If there is no molybdenum wire between the two conductive blocks, the small relay of the wire cutting machine will be automatically disconnected, and the "broken wire protection" switch will replace the molybdenum wire. "It is equivalent to molybdenum wire. "Broken wire protection" has both positive and negative effects on wire EDM. It avoids the phenomenon of molybdenum wire fluttering and water splashing randomly when the middle wire is broken. Negative effect one, to increase the protection of broken wire, it is necessary to add a conductive block, which makes the frictional resistance of the wire up and down different, resulting in inconsistent tension of the molybdenum wire; When cutting aluminum, adding one more conductive block is the danger of one more wire. Here is a reminder, do not continue wire threading immediately after wire-cutting starts wire break protection. One is that the molybdenum wire is not easy to wear at this time; the other is that cutting the workpiece after wearing the wire will leave traces of broken wires. Because the modern mold industry generally has high requirements for molds, too many broken wire marks on the workpiece are allowed.

From the earliest slow-moving to fast wire-feeding and then to medium wire-feeding, the R&D and production of wire cutting has been formed. In order to adapt to future processing and production, wire cutting technology needs to be broken through. General wire cutting machine tools are used in major processing industries, such as mold factories, machinery factories, tool factories, hardware factories, electronic instrument factories, precision machinery factories, auto parts factories, military factories, etc. Among them, the large taper wire cutting has expanded the scope of the processing industry, such as plastic-steel door and window special-shaped material forming molds, aluminum alloy door and window special-shaped forming molds, auto parts, TV sets, washing machines and other household appliances shell forming molds, etc. From here we can see that the emergence of wire cutting is essential for the development of the processing industry. Today, let's talk about some of the performance of wire cutting machine tools. The wire-feeding machine tool has multiple cutting functions to ensure the machining accuracy of the workpiece and the intelligent non-stripe coverage function. At the same time, the cutting parameters of the machine tool can be automatically adjusted, which is its high performance. The CNC system of the wire cutting machine adopts an intelligent CNC system, and also has a high-quality PC and HF wire cutting system control. The high-performance pulse power supply used in the high-frequency power supply for wire cutting has the characteristics of stability, high output power, high cutting efficiency, high surface finish, and low electrode wire loss.

Last time we talked about the influencing factors of non-electrical parameters on the machining process indicators. Today we will talk about the influence of electrical parameters on the machining process indicators of wire cutting machine tools. 1. Pulse peak current The pulse peak current increases when other parameters remain unchanged, and the single pulse discharge energy and processing current of the wire cutting machine will also increase. At this time, it can be clearly seen that the cutting speed of the middle wire line increases, and the surface roughness of the workpiece is reduced at the same time. 2. Pulse width Under the condition that the machining current remains unchanged, the cutting speed of the wire cutting machine tool will increase with the increase of the pulse width (remind here that after the pulse width of the wire cutting machine increases to a certain level, the machining speed will not increase with the increase of the pulse. Therefore, the pulse width is generally not greater than 50μs), and the subsequent problem is that the surface roughness of the workpiece will rise. 3. Power supply voltage The power supply voltage of the wire-feeding machine tool increases when the peak current and processing current remain unchanged, and it can be clearly seen that the cutting speed of the wire-feeding machine is accelerated, and the roughness of the workpiece surface does not change significantly.

The working principle of the EDM punching machine is to use the metal copper tube to make continuous vertical movement up and down to carry out pulse EDM corrosion processing on the conductive material. The heat dissipation holes of the engine, the small holes on the sieve plate, the oil passage holes of the pneumatic components, the oil injection holes of the nozzle oil pump, the spinneret holes of the chemical spinning spinneret, the threading holes of the middle wire cutting, etc. are all suitable for EDM. perforator. The EDM uses a hollow copper tube and then liquid or gas passes through the fine hole to cool and remove chips. The discharge of electrodes and metals produces high temperatures that corrode the workpiece, and can be used to machine superhard steel, cemented carbide, copper, aluminum, and any conductive material. EDM punching machines can be roughly divided into two types, one is liquid perforation, and the other is gas perforation. Liquid processing may cause the pores to be blocked because the liquid needs to pass through the pores, so only 0.02mm holes can be processed. The depth can only be processed 0-300mm. Gas perforation is not easy to block due to the gas passing through the pores, so tighter holes can be processed. What is the difference between EDM and wire EDM 1. The workpiece required by the EDM puncher should have a cross section or shape, and the EDM wire cutting moves along the electrode wire 2. The EDM punching machine has only one relative servo feed movement, while the EDM wire cutting has two horizontal directions and relative servo feed movements.

CNC wire EDM processing includes fast wire processing and slow wire processing, which are widely used in the mold manufacturing industry. What is the current development status of the processing efficiency, cutting accuracy and surface quality of these two technologies? Development status of fast-moving wire processing technology As the name suggests, fast wire processing is named because the electrode wire runs at high speed during the cutting process. Fast wire processing machine tool is an original electric processing machine tool in my country. After decades of continuous improvement and development, it has become an important processing method in the manufacturing industry. It can meet the requirements of medium and low-end mold processing and other complex parts manufacturing, and occupies a considerable weight in the middle and low-end market. The biggest advantage of fast wire processing machine tools is that it has a good performance-price ratio. Because of its practicability and economy, it has a large domestic market. The traditional fast wire processing adopts one-time cutting process, the processing efficiency is about 40 mm2/min, the surface roughness is about Ra3.0μm, the surface has obvious lines, and the processing accuracy is about 0.02 mm. In order to improve the processing quality, the manufacturers of fast wire processing machine tools have improved the relevant parts of the machine tools by referring to the cutting process for many times, and the so-called "intermediate wire cutting machine tools" have appeared. The numerical control precision of the machine tool, pulse power supply, wire feeding system, process database and many other process technologies have been greatly improved. Improve the machining accuracy and improve the surface quality. At present, the technical indicators of the medium wire processing machine tool: the efficiency of one cutting is 180mm2/min, the surface roughness after multiple cuts is Ra≤1.0μm, the average efficiency at this time is 50mm2/min, and the surface gloss is processed. No obvious cutting stripes, the machining accuracy is 0.01mm, and the wire loss is ≤0.01mm/200,000mm2. These performance indicators seem to be relatively good, but it should be noted that obtaining these indicators requires ensuring that all aspects are well ensured. Once there are discrepancies, such as changes in the concentration of the working fluid and the loss of the electrode wire, it will affect the stability of the processing quality. Typical manufacturers of wire-feeding machine tools in production include Suzhou Sanguang, Suzhou Hanqi, Shanghai Tello, Beijing Ande, Suzhou Baoma, Suzhou Xinhuo, and Shanghai Dazhong. Development status of slow-moving wire processing technology With the continuous improvement of the manufacturing accuracy and surface quality requirements of precision, complex and long-life stamping dies, the fast wire processing technology can no longer meet the manufacturing requirements of precision molds. This situation has promoted the rapid development of slow wire processing technology. It has reached a very high level and is irreplaceable by other processing technologies. 1. Development status of slow-moving wire processing technology (1) Improve machining accuracy Multiple cutting technology is the fundamental means to improve the machining accuracy and surface quality of slow-moving wire. Generally, it is formed by one-time cutting, the second-time cutting improves the accuracy, and the third-time cutting improves the surface quality. Corners collapse due to wire lag when cutting corners. In order to improve the corner cutting accuracy, more dynamic corner processing strategies are adopted. Such as: automatic change of processing speed, automatic adjustment of water pressure, control of processing energy, etc. The high-precision finishing circuit adopted by the advanced slow wire-feeding machine tool is an effective technology to improve the flatness of the workpiece, so that the machining accuracy of thick parts can be significantly improved; in order to carry out small rounded corners, narrow slits, narrow grooves and fine parts For micro-finishing, the top CNC low-speed wire EDM machine can use 0.02 ~ 0.03 mm electrode wire for cutting. In order to ensure high-precision processing, the mechanical accuracy of the machine tool, the accuracy of pulse power supply, and the accuracy of servo control (including the control of mechanical motion, pulse parameters, wire feeding system and working fluid system) have reached a very high level. The water temperature cooling device is adopted to make the internal temperature of the machine tool the same as the water temperature, which reduces the thermal deformation of the machine tool; the closed-loop digital AC (DC) current servo control system is adopted to ensure excellent dynamic performance and high positioning accuracy, and the machining accuracy can be controlled within a few microns Precision positioning can achieve 0.1μm equivalent control; immersion processing is used to reduce thermal deformation of the workpiece; motor servo, closed-loop electrode wire tension control; voltage modulation tool setting power supply is used to achieve high-precision tool setting, and the tool setting accuracy can reach 0.002 ㎜ , does not damage the workpiece, whether dry or wet. (2) Surface quality is improving day by day The advanced slow wire processing machine adopts the non-electrolysis-proof pulse power supply with zero average voltage, and the damage of electrolysis has been reduced to a minimum. In addition, due to the improvement of pulse power supply, high peak value and narrow pulse width (microsecond level) are generally used, and most of the materials are thrown out of the gas phase, which takes away a lot of heat, and the surface temperature of the workpiece cannot rise, and the phenomenon of cracking is great Reduce; not only high processing efficiency, but also greatly improve the surface quality. The use of electroless power supply for WEDM can control the surface metamorphic layer to be less than 2μm. The wear resistance of the cutting edge of the carbide die is no different from that of grinding, and even better than mechanical grinding. More and more parts are processed "replaced by cutting". (3) Improve processing efficiency Due to the development of nanosecond high-peak current pulse power supply technology and detection, control, and anti-interference technology, the processing efficiency of slow-moving wire-feeding machine tools is also constantly improving. 2/min. The processing efficiency of larger thickness workpieces has practical technical improvement. For example, when cutting workpieces with a thickness of 300 mm, the processing efficiency can reach 170 mm2/min. For the processing of workpieces with varying thicknesses, by automatically detecting the thickness of the workpieces and automatically adjusting the processing parameters to prevent wire breakage, the highest processing efficiency in this state is achieved. In addition, the fast automatic wire threading technology introduced by the advanced slow wire processing machine tool, the automatic wire threading time is less than 15 s, which improves the efficiency of processing operations; Wire switching processing. Thick wire is used for the first cutting, generally with a wire diameter of 0.25 mm, to improve processing efficiency and can be cut without core; then use thin wire for trimming, generally using 0.10 mm thin wire, to cut small rounded corners, and can By improving the accuracy, the overall cutting time can be saved by 30% to 50%. (4) Development of automation, intelligence and informatization In the process of processing, in order to reduce human intervention and ensure that the expected process indicators are achieved, the automation, intelligence and informatization of slow-moving wire processing have achieved corresponding development. The complete process expert system of the slow-moving wire processing machine provides a complete set of parameters according to the processing requirements. Not only includes common electrode wire grades and corresponding workpiece materials, but also provides processing parameters for special materials such as PCD, PCBN, etc., which can be determined according to whether the upper and lower nozzles are in contact with the workpiece, the distance is large, whether it is refined in the cutting wind, or the open surface is refined. Repair, precision, surface roughness and efficiency which priority processing strategy to generate their own specifications; discharge expert system to deal with random factors in cutting, cutting in, cutting out, section change, center cutting, near-edge cutting, large In the case of high-speed cutting of cross-sections, self-adaptive control strategies and automatic control functions are used in the processing process to obtain continuous, stable and efficient processing. The automatic no-hole detection function is also very practical. During automatic skip processing, if the pre-hole is forgotten to be punched or the hole position is offset, the machine tool will automatically move to the next pre-hole, which can prevent the machine from shutting down when unmanned processing is performed. When a short circuit occurs after threading the wire, it can automatically search for the position to eliminate the short circuit, which improves the reliability of continuous unmanned operation. The CNC system of the machine tool is equipped with a standardized mechanical interface to form an intelligent manufacturing system. Through the manipulator of the 3R system or the EROWA system, the automatic exchange of workpieces (pallets) can be easily realized. With the expert system and automatic electrode wire exchange technology, it can be Complete the entire processing process automatically. 2. The technical level of each grade of slow wire-feeding machine tools The slow-moving wire processing machine tools can be divided into four grades: top, high-grade, mid-grade and entry-level. Typical manufacturers of slow wire-feeding machine tools include Swiss GF Machining Solutions (formerly Agie Charmilles), Japan Makino, Japan Mitsubishi, Japan Sodick, Japan West, Japan Frank and so on. (1) Top-level slow-moving wire processing machine tools This kind of slow-moving wire processing machine represents the highest level at present and is mainly manufactured by Switzerland and Japan. The machining accuracy of this type of machine tool can be guaranteed to be within ±0.002 mm, the maximum machining efficiency can reach 400-500 mm2/min, and the surface roughness can reach Ra0.05 μm. Use Φ0.02 ㎜ electrode wire for micro-finishing, most of the main machines have a thermal balance system, and some machine tools use oil for cutting. This type of machine tool has complete functions and a high degree of automation, and can directly complete the precision machining of molds. The life of the processed molds has reached the level of mechanical grinding. (2) High-grade slow wire processing machine tools This type of machine tool is basically produced by Swiss and Japanese companies, with automatic wire threading function, non-resistance anti-electrolysis power supply, overall thermal constant system, can use Φ0.07 mm electrode wire for cutting, the accuracy is about ±0.003 mm, the highest processing The efficiency can reach more than 300㎜2/min, and the surface roughness can reach Ra<0.2μm. It has the function of timely detection of workpiece cross-section changes and real-time optimization of discharge power. This type of machine tool is also widely used for precision stamping die processing. (3) Mid-range slow wire processing machine tool This type of machine tool is generally produced by Swiss and Japanese companies in China's manufacturing plants. The technical level of some Taiwanese machines can also reach this level, and its configuration and performance meet the requirements of most domestic precision wire cutting processing. Generally, non-resistance anti-electrolysis power supply is used, and it has the functions of submerged processing and taper cutting. The practical maximum processing efficiency is 150~200 ㎜2/min, the best surface roughness can reach Ra<0.4μm, and the cutting accuracy can reach ±0.005㎜. Generally, electrode wires of Φ0.1㎜ and above are used for cutting. The collision protection system can avoid collision damage caused by programming errors or misoperation, equipped with or optional automatic wire threading mechanism. (4) Entry-level wire-feeding machine tool This type of machine tool is generally a Taiwanese machine tool or a machine tool independently developed and produced in China. Its configuration and performance meet the processing requirements of domestic ordinary molds and parts. Generally, the process of cutting one and repairing one and one cutting and repairing two can be used, which can stably achieve a surface finish of about Ra0.8μm and a machining accuracy of ±0.008㎜. Most of them can only use electrode wires of 0.15mm and above for cutting, and the processed surface microstructure , There is a certain gap between corners and advanced machine tools. Generally speaking, compared with fast wire processing machine tools, slow-moving wire-feeding machine tools have obvious advantages in terms of processing efficiency, precision, and surface quality. Although the price of slow-moving wire processing machine tools is relatively expensive, with the rapid development of the manufacturing industry, it will be more and more used in various processing fields. Development status of fast-moving wire processing technology As the name suggests, fast wire processing is named because the electrode wire runs at high speed during the cutting process. Fast wire processing machine tool is an original electric processing machine tool in my country. After decades of continuous improvement and development, it has become an important processing method in the manufacturing industry. It can meet the requirements of medium and low-end mold processing and other complex parts manufacturing, and occupies a considerable weight in the middle and low-end market. The biggest advantage of fast wire processing machine tools is that it has a good performance-price ratio. Because of its practicability and economy, it has a large domestic market. The traditional fast wire processing adopts one-time cutting process, the processing efficiency is about 40 mm2/min, the surface roughness is about Ra3.0μm, the surface has obvious lines, and the processing accuracy is about 0.02 mm. In order to improve the processing quality, the manufacturers of fast wire processing machine tools have improved the relevant parts of the machine tools by referring to the cutting process for many times, and the so-called "intermediate wire cutting machine tools" have appeared. The numerical control precision of the machine tool, pulse power supply, wire feeding system, process database and many other process technologies have been greatly improved. Improve the machining accuracy and improve the surface quality. At present, the technical indicators of the medium wire processing machine tool: the efficiency of one cutting is 180mm2/min, the surface roughness after multiple cuts is Ra≤1.0μm, the average efficiency at this time is 50mm2/min, and the surface gloss is processed. No obvious cutting stripes, the machining accuracy is 0.01mm, and the wire loss is ≤0.01mm/200,000mm2. These performance indicators seem to be relatively good, but it should be noted that obtaining these indicators requires ensuring that all aspects are well ensured. Once there are discrepancies, such as changes in the concentration of the working fluid and the loss of the electrode wire, it will affect the stability of the processing quality. Development status of slow-moving wire processing technology With the continuous improvement of the manufacturing accuracy and surface quality requirements of precision, complex and long-life stamping dies, the fast wire processing technology can no longer meet the manufacturing requirements of precision molds. This situation has promoted the rapid development of slow wire processing technology. It has reached a very high level and is irreplaceable by other processing technologies. 1. Development status of slow-moving wire processing technology (1) Improve machining accuracy Multiple cutting technology is the fundamental means to improve the machining accuracy and surface quality of slow-moving wire. Generally, it is formed by one-time cutting, the second-time cutting improves the accuracy, and the third-time cutting improves the surface quality. Corners collapse due to wire lag when cutting corners. In order to improve the corner cutting accuracy, more dynamic corner processing strategies are adopted. Such as: automatic change of processing speed, automatic adjustment of water pressure, control of processing energy, etc. The high-precision finishing circuit adopted by the advanced slow wire-feeding machine tool is an effective technology to improve the flatness of the workpiece, so that the machining accuracy of thick parts can be significantly improved; in order to carry out small rounded corners, narrow slits, narrow grooves and fine parts For micro-finishing, the top CNC low-speed wire EDM machine can use 0.02 ~ 0.03 mm electrode wire for cutting. In order to ensure high-precision processing, the mechanical accuracy of the machine tool, the accuracy of pulse power supply, and the accuracy of servo control (including the control of mechanical motion, pulse parameters, wire feeding system and working fluid system) have reached a very high level. The water temperature cooling device is adopted to make the internal temperature of the machine tool the same as the water temperature, which reduces the thermal deformation of the machine tool; the closed-loop digital AC (DC) current servo control system is adopted to ensure excellent dynamic performance and high positioning accuracy, and the machining accuracy can be controlled within a few microns Precision positioning can achieve 0.1μm equivalent control; immersion processing is used to reduce thermal deformation of the workpiece; motor servo, closed-loop electrode wire tension control; voltage modulation tool setting power supply is used to achieve high-precision tool setting, and the tool setting accuracy can reach 0.002 ㎜ , does not damage the workpiece, whether dry or wet. (2) Surface quality is improving day by day The advanced slow wire processing machine adopts the non-electrolysis-proof pulse power supply with zero average voltage, and the damage of electrolysis has been reduced to a minimum. In addition, due to the improvement of pulse power supply, high peak value and narrow pulse width (microsecond level) are generally used, and most of the materials are thrown out of the gas phase, which takes away a lot of heat, and the surface temperature of the workpiece cannot rise, and the phenomenon of cracking is great Reduce; not only high processing efficiency, but also greatly improve the surface quality. The use of electroless power supply for WEDM can control the surface metamorphic layer to be less than 2μm. The wear resistance of the cutting edge of carbide die is no different from grinding, even better than mechanical grinding,

The advantages of milling processing function of CNC EDM small hole machine The use of CNC EDM small hole machine to develop milling processing is a new type of EDM method. Using the small hole machine electrode tube for 3D or 2D contour machining, like a CNC milling machine, no longer requires the manufacture of complex shaped electrodes. It can smoothly process stainless steel, hardened steel, cemented carbide, high temperature and heat-resistant materials, titanium alloys and other difficult-to-machine materials. Compared with EDM, this processing method has the advantages of saving a lot of forming electrodes, short production cycle, low processing cost, and high processing flexibility. Similar to ordinary mechanical milling, EDM milling can be divided into vertical axis, horizontal axis and oblique axis EDM according to the inclined position of the electrode rotation axis. When the electrode axis is placed horizontally or obliquely, the relative feed movement of the electrode and the workpiece can be realized by the three-axis linkage of X, Y, and S of the CNC EDM small hole machine tool, or by the two axes of X, S and the The rotation of the workpiece is linked to achieve. For example, lateral helical grooves, 2D contoured lands or pits can be machined with the groove milling function.