This can be done according to the following steps:
(1) First, according to the size of the workpiece to be machined, cut the thin copper sheet (the thickness depends on the electrode wire and the shape of the machined part) into a long strip, and then fold it to ensure that the folded part is long and short.
(2) Then hammer the bent part of the copper sheet flat with a small hammer, and trim it into a wedge shape with a matching file;
(3) Plug the copper sheet treated above into the gap formed by electrode wire processing, and at the same time, drop 502 glue (that is, the instant drying glue of epoxy resin) on this part of the surface of the workpiece.
(4) when inserting the copper sheet into the machining part, it should be noted that when connecting the copper sheet with 502 glue, it should be far away from the rest of the workpiece to avoid leakage of 502 glue and insulation. In addition, symmetrical distribution should be considered in the position where the copper sheets are attached, and the copper sheets should be plugged at the same time to avoid the deviation of the workpiece and affect the processing quality of the workpiece. Ensure the correctness of the shape and the reliability of the precision of the remaining part of the cutting workpiece.
(2) A conductive copper sheet is filled between the cutting part and the base material. A thin copper sheet folded, trimmed, hammered and filed is filled in the gap formed by wire electrode machining, and the copper sheet is closely attached to the gap wall. The purpose of filling this copper sheet is to conduct electricity, because 502 glue is used when connecting the copper sheet in front, and 502 glue is not conductive. In order to meet the requirements of electrical conductivity, the method of filling conductive copper sheet is adopted. When filling conductive copper sheets, we should also pay attention to the symmetrical arrangement of copper sheets, and at the same time, the copper sheets should be tightened, not too tightly, so as not to scratch the surface of the workpiece. Whether it's sticking connecting copper sheets or filling conductive copper gaps. The small copper sheet should be made into an arc, and the surface of the hammered copper sheet should be polished with metallographic abrasive cloth to ensure the smooth surface of the copper sheet and avoid scratching the machined surface of the workpiece.
Zhongshite Technology pointed out here that the so-called "intermediate wire feeding" does not mean that the wire feeding speed is between high speed and low speed, but a composite wire feeding cutting machine, that is, the wire feeding principle is that high speed (8- 12m/s) is used for rough machining and low speed (1-3m/s) is used for finishing, so that the work is relatively stable and the jitter is small.
Therefore, it can be said that the user's "middle wire feeding" actually refers to the processing technology of some low-speed wire feeding machines, and realizes the reciprocating wire feeding EDM machine with no stripe cutting and multiple cutting.