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In order to ensure the excellent processing quality of the workpiece, the material of the machine is gapped between the cut part and the parent material in the process of machining. If the material is not fixed, the material may be deformed to affect the processing quality. Therefore, the material is cut between the cut part and the parent material like the slow threading process. Paste the connecting copper piece so that the remaining part of the workpiece is fixed with the parent material when cutting.
First, according to the size of the workpiece to be processed, the thin copper sheet (thickness is determined according to the condition of the electrode wire and the shape of the processing site) is cut into strips, then folded, and the length of the folded part is guaranteed to be long and short. The purpose of using a short copper sheet is to reduce the thickness of the copper sheet, so that the upper nozzle is closer to the workpiece processing site, in order to improve the processing accuracy and then the copper sheet folded with the hammer is flattened with a small hammer.
Then the copper pieces processed above are stuffed into the gap formed by the wire electrode processing, and 502 glue (that is, epoxy resin instantaneous quick-drying glue) is dropped on the surface of the parts of the workpiece. Due to the high pressure flushing of the wire-cut electric discharge machine, the pressure applied to the workpiece is large during cutting. If pure copper is used to ensure the conductivity and fixation, the following problems will easily arise:
(a) The copper piece is too loose, and it is feared that the fixing is not reliable and the conduction is unstable.
(b) The copper piece is too tight, and it is feared to damage the surface of the workpiece and damage the tolerance of shape and position. Therefore, the 502 glue is used to ensure that the cut part and the parent material are fixed and then straightened and the copper piece can be removed from the gap. take out. In particular, attention should be paid to the following: When connecting the copper piece with 502 glue, keep it away from the remaining part of the workpiece to prevent the 502 glue from penetrating into the threading hole of the godet just below it, causing plugging of the threading hole.
In addition, the position of the adhesive copper sheet should be symmetrically distributed, and it should be ensured that the plug is tight at the same time to prevent the workpiece from shifting, which will affect the quality of the workpiece.
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