Electrical discharge machining (EDM) shaping method for external spiral structure
A forming processing and external spiral technology, which is applied in the field of mechanical processing, can solve the problems of high manufacturing cost, difficulty in purchasing spiral broaches, inability to process high-hardness materials with high-precision dimensions, etc., and achieve low processing cost, high processing efficiency, and improved The effect of processing efficiency
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[0042] The EDM machine used in the test is the HYPERSPARK2HS model produced by AgieCharmilles, Switzerland.
[0043] In this embodiment, the outer helical structure to be prepared is an example of high-strength elastic steel material, φ10±0.03 small diameter, φ12±0.03 middle diameter, φ15±0.03 major diameter, 87° thread lead angle, and nine-wire outer helical structure. The structural feature of the product is that there are nine rectangular outer spirals on the outer cylindrical surface, the spirals are evenly distributed along the circumference, and the shape is similar to nine-head threads. See figure 1 .
[0044] Such as Figure 4 Shown, the processing method of this external spiral structure, comprises the following steps:
[0045] Step 1: According to the outer contour parameters of the above-mentioned nine-wire outer spiral, use pure copper material to process the tool electrode. The processing material of the tool electrode can be conventional easy-to-process electr...
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