Slow wire walking, also called low-speed wire walking, is a kind of CNC machining machine tool that uses continuously moving fine metal wire as an electrode to pulse spark discharge on the workpiece to generate a high temperature of over 6000 degrees, ablate metal and cut into a workpiece. The principle of wire processing is the phenomenon that there is a gap between the wire electrode and the workpiece, and the metal is removed by continuous discharge. Since the slow-moving wire cutting machine adopts the method of wire electrode continuous feeding, that is, the wire electrode is processed during the movement, so even if the wire electrode is worn out, it can be continuously supplemented, so it can improve the machining accuracy of the parts and slow the wire. The surface roughness of the workpiece processed by the cutting machine can usually reach Ra=0.8μm and above, and the roundness error, linear error and dimensional error of the slow-moving wire cutting machine are much better t
The static pressure slide rail (TTW guide) of the CNC machining lathe transfers the oil with a certain pressure through the throttle to the oil cavity between the sliding surfaces of the slide rail (TTW guide) to form a pressure oil film to float the moving parts , Make the sliding rail (TTW guide) surface in a pure liquid friction state. CNC machining General CNC machining usually refers to computer digital control precision machining, CNC machining lathe, CNC machining milling machine, CNC machining c17200 beryllium copper and milling machine, etc. The feed route of finishing is basically carried out along the part contour sequence. Therefore, the focus of determining the feed route is to determine the feed route of rough machining and idle stroke. In the numerical control processing, the control system issues instructions to make the tool perform various motions that meet the requirements, and the shape and size of the workpiece are expressed in the form of numbers and lette
KOVAR parts are commonly used as metal casing materials in the electronic packaging industry. Because they have a linear expansion coefficient close to that of molybdenum group glass, and can produce less sealing stress during the sealing (melting) process with molybdenum group glass, so To obtain good air-tightness, in order to make the metal tube and shell to achieve air-tight sealing, in the entire sealing process, the annealing process undoubtedly plays an important role as a link between the previous and the next. The internal stress generated during KOVAR machining also prepares the material structure for the implementation of the subsequent process-the sealing process of the metal parts. The main purpose of annealing Kovar shell before sealing is to: (1) Eliminate machining stress. When Kovar undergoes plastic machining deformation during cold working, about 10% to 15% of the applied energy is converted into internal energy, which is commonly referred to as internal stress,
Because Cnc Machine tools have the characteristics of strong adaptability, high machining accuracy, good quality, and high machining efficiency, they have been widely used. CNC technology has also become the most important technical foundation of modern advanced manufacturing technology and an important component of today’s advanced manufacturing technology. part. However, most of the hardware and software of CNC systems (represented by FANUC, SIEMENS, etc.) on the market are dedicated and incompatible with each other, and the system architectures are not the same, which results in different manufacturers' control systems. Relatively independent and closed to each other. With the advancement of technology and the intensification of market competition, the CNC system of this special architecture has increasingly exposed its inherent defects.
The large current should be greater than 200A. The response time of the WDTS device corresponding to this output characteristic is about 10is, which can already meet the dynamic requirements of the trimming system. For this reason, the main performance of the developed drive power supply is as follows: (1) The voltage is continuously adjustable from 0 to 300V; (2) The resolution is 100V; (3) The output stability of the power supply is high, the output voltage ripple is small, and the temperature drift is small; (4) ) Can realize automatic control.
3 Practical application In order to test the performance of this dressing system, an online dressing experiment of MEEC grinding wheels was carried out on the self-developed MEEC machining system. The system mainly includes: self-developed multifunctional compound grinder (which can realize compound processing of outer circle, plane, inner circle and tools).
Multi-purpose composite electric machining pulse power supply (can realize the power supply to the machining circuit and the grinding wheel dressing circuit; the pulse frequency and pulse width of the power supply are adjustable; the power is high and the efficiency is high; the application results show that the system can well become the online MEEC grinding wheel Automatic trimming, high precision, good reliability, sensitive response, small size, beautiful appearance, can be used as an important accessory of MEEC processing system.
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