(1) Basic principles

Using a continuously moving thin metal wire (called an electrode wire) as an electrode, the workpiece is subjected to pulse spark discharge to remove metal and cut into shape.

(2) Basic equipment: wire EDM machine tools

（3) Main features

In addition to the basic characteristics of electric discharge machining, wire-cut electric discharge machining also has some other characteristics:

① There is no need to manufacture tool electrodes with complex shapes, and any two-dimensional curved surface with a straight line as the generating line can be processed;

②Can cut narrow slits of about 0.05 mm;

③ During processing, all excess materials are not processed into waste chips, which improves the utilization rate of energy and materials;

④ In low-speed wire EDM processing where the electrode wire is not recycled, since the electrode wire is constantly updated, it is beneficial to improve processing accuracy and reduce surface roughness;

⑤The cutting efficiency that wire EDM can achieve is generally 20-60 mm2/min, up to 300 mm2/min; the processing accuracy is generally ±0.01 to ±0.02 mm, up to ±0.004 mm; surface roughness Generally, it is Ra2.5 to 1.25 microns, and the maximum can be Ra0.63 microns; the cutting thickness is generally 40-60 mm, and the maximum thickness can be 600 mm.

(4) Scope of use

Mainly used for processing: various complex-shaped and precise workpieces, such as punching dies, concave dies, convex and concave dies, fixed plates, unloading plates, etc.; forming tools, templates, and metal electrodes for EDM forming. ; Various micro holes, narrow slits, arbitrary curves, etc. It has outstanding advantages such as small machining allowance, high machining accuracy, short production cycle, and low manufacturing cost. It has been widely used in production. At present, wire EDM machine tools at home and abroad account for more than 60% of the total number of electrical machining machine tools.

Wire-cut EDM is a technology that enables dimensional processing of workpieces. Under certain equipment conditions, reasonable formulation of processing process routes is an important link in ensuring the quality of workpiece processing.