Wire-cut machining method for rotary parts based on contour approximation method

Abstract

The invention discloses a rotational part wire-electrode cutting machining method based on the outline approaching method. The method includes the steps that in the rough machining process, circumscribing polygon rough machining parts with the cross-sectional shapes approaching final parts are cut at first, a large number of workblank surplus materials are removed quickly, and rough machining time is greatly shortened. According to the rotational part wire-electrode cutting machining method based on the outline approaching method, the characteristic that electrode dissipation can be automatically compensated by means of wire-electrode cutting is fully utilized, and machining precision is greatly improved. No machining cutting force exists, long and thin low-rigidity rod-shaped parts with the machining diameter being smaller than 50 microns can be machined, and the machining diameter range can reach up to dozens of centimeters and reach dozens of microns minimally. Wire-electrode cutting wires are thin, and rotational parts with the deep groove characteristic can be directly machined.

Description

technical field [0001] The invention belongs to a processing method in the technical field of electric discharge machining, and in particular relates to a wire-cutting processing method of a rotary body part based on a contour approximation method using a wire-cutting technology and a rotating fixture. Background technique [0002] EDM has the advantages of not being limited by mechanical properties such as the strength and hardness of the workpiece material, and has the advantages of no macro cutting force. It has special advantages in the precision and ultra-precision machining of superhard, low stiffness, micro and other special parts. It is especially suitable for the processing of difficult-to-machine materials, low stiffness and fine parts, and is widely used in aviation, aerospace, automobile, electronics, mold, light industry and other industries. [0003] At present, the traditional processing methods of rotary parts mainly rely on turning and grinding. In the fiel...

AI Technical Summary

Problems solved by technology

However, the efficiency of EDM is low, and at the same time, in the method proposed by Jun Qu et al., the cutting line moves directly to the contour line of the rotating part, and the depth of cut is constantly changing, resulting in a constant change in the volume of material removal required per unit Yes, due to the limited capacity of EDM to remove material volume per unit time, it is easy to cause the rotating workpiece to come into contact with the cutting line, resulting in frequent short circuits, resulting in frequent wire breakage or the removal of the material on the surface of the workpiece is not completely removed, resulting in unwanted part shapes. This situation is especially obvious when processing parts with a diameter of more than 3mm.

The above shortcomings are all important reasons that restrict the development and promotion of EDM

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