A high-efficiency electrode wire for precision mold cutting and its preparation method

Abstract

The invention relates to an efficient electrode wire for precision mould cutting. The efficient electrode wire comprises a core material and a shell layer wrapping the surface of the core material, the core material is made of yellow copper from the processes of smelting, casting, stretching and annealing, the shell layer is a discontinuous shell layer formed by heating, continuously drawing and continuously annealing a zinc metal plating layer plated on the yellow copper core material, and the discontinuous shell layer comprises shell particles which radially cover 40-90% of the surface of the core material and are distributed at intervals along an axial direction of the surface of the core material. The invention further relates to a preparation method of the electrode wire. The preparation method is simple in production technology, strong in operability, less in preparation steps, simple in production equipment and easy to prepare satisfactory products and realize large-scale and automated production. The efficient electrode wire is strong in universality and is particularly suitable for precision mould cutting.

Description

technical field [0001] The invention relates to an electrode wire for electrical discharge machining of electric wires and a preparation method thereof, in particular to a high-efficiency electrode wire for precision mold cutting and a preparation method thereof. Background technique [0002] Machining technology is changing with each passing day. As a special precision machining technology, wire-cut EDM has developed rapidly, especially the slow-moving wire-cut wire-cut machining in wire-cut EDM. The development of wire cutting technology is inseparable from the simultaneous development of wire electrode technology. Now the design concept of slow wire machine tool popular in the world is designed according to the performance of electrode wire. [0003] Since the invention of galvanized electrode wires in the 1970s and 1980s, a variety of electrode wires have appeared in the market, such as: brass electrode wires, ordinary coated electrode wires, and composite electrode wire...

AI Technical Summary

Problems solved by technology

[0006] Composite electrode wire: the core material is steel wire. During preparation, the surface is plated with pure copper and then brass, or it can be directly plated with brass. While improving the cutting efficiency, it also increases the production cost

[0007] The performance problem of the wire electrode will affect its cutting efficiency, and the key to improving the cutting efficiency of the wire electrode is the physical characteristics of the wire electrode. The physical characteristics of the wire electrode are determined by the basic composition ratio of the electrode wire material and the composition metal characteristics of the core material, such as The applicant's application publication number is CN102528190A Chinese invention patent "a high-efficiency multi-layer composite electrode wire and its preparation method" discloses a high-efficiency multi-layer composite electrode wire, the electrode wire includes a core and a coating on the The foreskin on the core is characterized in that the core is a brass core formed by a brass core wire after diffusion annealing, water cooling, and continuous pulling and annealing treatments. The metallographic structure of the brass core is mainly α phase structure; the foreskin is a diffusion alloy layer formed after the copper metal coating and zinc metal coating sequentially plated on the brass core wire through diffusion annealing, water cooling and continuous pulling and annealing treatment. The metallographic structure of the alloy layer is mainly β-phase structure, which is prepared by electroplating copper and zinc metal coatings on the core wire, and then undergoing diffusion annealing, water cooling, continuous drawing and continuous annealing treatment, and finally stretching. multi-layer composite electrode wire, the cutting efficiency is significantly improved compared with ordinary galvanized electrode wire, the comprehensive cost of cutting is lower than that of ordinary galvanized electrode wire, and the versatility is good. The distribution of zinc metal is more uniform, but there is still a phenomenon that the heat generated during the cutting process is not consumed uniformly and vaporized during the cutting process, and the continuous diffusion alloy layer is not conducive to the dissipation of heat, thus affecting the cutting efficiency and cut quality

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