1 WEDM processing
EDM EDM has been widely used. The advent of WEDG technology has satisfactorily solved the problem of the fabrication and installation of the microelectrode, making the micro-EDM into the use stage. In this regard, Zeng Zelong, University of Tokyo, Japan, et al. Have processed the fine shafts of Φ2.5mm and micropores of Φ5mm, representing the world frontier in this field. According to statistics, the proportion of EDM EDM is increasing year by year, now close to 10%.
Slow walking silk cutting new technologies continue to emerge
Walking thread cutting is the main development in recent years. With the development of electroless pulse power, pulsed power of optimized energy, ion control of deionized water and the development and application of a series of precision machining technologies, the development of EDM has reached a new stage. Switzerland AgieCharmilles walking thread cutting machine can get the contour accuracy of 1.5um and Ra0.1um processing quality, can be suitable for precision die processing. With the realization of localization, the price of such machine tools is rapidly reduced and gradually widely used.
Agie has developed the Agiecut Vertex twin wire EDM machine. The machine comes with two reels that can be cut simultaneously using different diameter wire to improve cutting efficiency. All operations are done automatically with sensors to monitor their operation. The diameter of the cut wire is 0.02-0.02mm.
2 EDM technology to high-precision and high-automation development
In recent years, CNC EDM technology can use standard copper electrode, the application of CAD / CAM technology to complete the two-dimensional or three-dimensional surface processing, no need to create the forming electrode, greatly simplifying the electrode preparation, in the high-precision machining, with Good prospects.
Recently, Japan invented a new EDM processing method, that is, in the processing fluid by adding a suitable amount of fine silicon powder, or aluminum powder, graphite powder can be made, the surface can improve the accuracy of several times. At present, the corresponding EDM machine tools have also been commercialized. Future spark discharge technology can not do without three kinds of trends, namely high speed, high precision and high automation.
3 special machinery processing
Can be divided into abrasive flow processing, water jet processing, low stress grinding, ultrasonic processing and other processing methods.
Abrasive water jetting is capable of precision cutting, blanking of workpieces, and secondly, the advantage of water jetting that it touches other hard-to-reach tools.
Ultrasonic Special Machining Use the tool to produce vibratory amplitude by delivering liquid abrasive particles with the ability to strike the workpiece and achieve machining. This technology is not yet widely used, mainly used in the mold of ultrasonic polishing. Abroad is studying the ultrasonic abrasive processing. Especially for rotary ultrasonic research, the quality of deep hole drilling is obviously improved. For many years, the United States has been researching on ultrasonic assisted diamond cutting tools. Japan is also developing ultrasonic assisted grinding.
4 other special heat processing
Other heat special processing refers to the use of electron beam, laser beam, plasma beam heat to melt the metal to achieve the purpose of processing. Mainly electron beam, EDM grinding, laser processing, plasma processing and other processing methods.
E-beam processing technology has developed rapidly in recent 20 years, and electron beams have been able to enter the subtle, welding, coating, melting, heat treatment, exposure, radiation and other processing. Electron beam processing technology will be high-power, high precision, miniaturization, automation direction.
Ion beam processing can be milling, sputtering coating, ion plating and microfabrication, etc. In particular, IAC technology both the advantages of both vapor deposition and ion implantation, can be prepared with strong adhesion, compact structure of various properties Excellent functional coating. Plasma arc-assisted machining can change the physical and mechanical properties of the local material of the 40-70 HRC metallic and superalloy materials. 【Suzhou Mold Casting】