How about EDM processing in China
EDM processing is the abbreviation of Electrical Discharge Machining. EDM its basic working principle is the use of the continuous movement of fine wire for the electrode. The workpiece pulse sparks discharge erosion of metal, cutting molding. Mainly used in mold manufacturing
It is mainly used for processing all kinds of complex shapes and precision of small parts. Such as punching Die punch, Die, convex and concave mold, fixed plate, discharge plate, forming tool, model, EDM metal electrode. A variety of fine holes, slits, any curve, with the processing margin is small, high precision machining, short production cycle, low manufacturing cost advantages, has been widely used in production. The current domestic and international spark WEDM has accounted for more than 60% of the total number of machine tools.
EDM is the use of electrodes and the spark between the workpiece when the power generated by the instantaneous high temperature. The layer to remove the material on the surface of the principle of the workpiece. EDM is suitable for high hardness conductive workpiece processing. CNC EDM machine is the best example of EDM. EDM processing characteristics
1: EDM processing speed and surface quality
Mold in the EDM processing will generally use coarse, medium, fine sorting processing. Roughing is achieved with high power and low loss, while the middle and finishing electrodes have a large relative loss, but in general, the finishing allowance is small and therefore the electrode losses are minimal and can be compensated by machining dimensional control or Do not affect the accuracy requirements to be ignored.
2: EDM carbon slag and slag
EDM processing in the production of carbon residue and the exclusion of carbon residue balance conditions can be carried out smoothly. In practice, often at the expense of processing speed to remove carbon slag, for example. In the middle of the use of high voltage, large-stop pulse and so on. Another reason for the exclusion of carbon residue is the complexity of the machined surface so that the chip path is not smooth. Only actively create a good exclusion of the conditions, symptomatic to take some way to actively deal with.
3: EDM workpiece and electrode mutual loss
EDM discharge pulse a long time is conducive to reducing electrode wear. EDM rough processing is generally used long discharge pulse and high current discharge, processing speed fast electrode loss is small. In the finishing, the small current discharge must reduce the discharge pulse time, so it not only increased the electrode loss but also significantly reduce the processing speed.