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Wire electrode for WEDM-LS electrical discharge machining and preparation method of wire electrode

An electrical discharge machining and electrode wire technology, which is applied in the field of electrode wire for slow wire EDM and its preparation, can solve the problems of high electric corrosion speed and cutting speed limitation, and achieves the improvement of processing speed, saving manufacturing cost and reducing human effect

Active Publication Date: 2014-01-29
NINGBO BODE HIGHTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, because the content of zinc in the γ phase is relatively high, the electrocorrosion rate of zinc will be relatively fast, and zinc will be consumed rapidly during the cutting process, so the cutting speed of this electrode wire is also limited. This electrode wire is similar to The patent document is US Patent US5945010

Method used

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  • Wire electrode for WEDM-LS electrical discharge machining and preparation method of wire electrode
  • Wire electrode for WEDM-LS electrical discharge machining and preparation method of wire electrode
  • Wire electrode for WEDM-LS electrical discharge machining and preparation method of wire electrode

Examples

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Embodiment 1

[0074] 1. Manufacture the electrode wire A whose diameter D0 of the electrode wire of the present invention is 0.25 mm. The transition layer 3 composed of β-phase copper-zinc alloy, the transition layer 3 includes a continuous continuous portion 3.1 and a discontinuous portion 3b formed by a β-phase copper-zinc alloy protruding from the continuous portion, and has a continuous portion embedded in the transition layer 3 3.1 Composition of gamma-phase copper-zinc alloy with a zinc content of 60wt% and pits and exposed β-phase with a zinc content of 47wt%;

[0075] 2. To this end, use the spraying method to electroplate a zinc coating with a thickness of 11 μm on a brass wire (mother core 6) with a diameter of 1.2 mm and a copper content of 80 wt %;

[0076] 3. Carry out stepped diffusion annealing in the annealing furnace on the silk sprayed in step 2. The annealing temperature in the low temperature section is 160°C, and the holding time is 3 hours to form the initial covering ...

Embodiment 2

[0087] 1. Manufacture the electrode wire B whose electrode wire diameter D0 of the present invention is 0.25 mm, the electrode wire includes a core 2 made of a brass alloy with a copper content of 63 wt%, and the core is covered with β Phase composition of the transition layer 3, and embedded in the transition layer 3 on the zinc content of 60wt% gamma phase and pits and exposed zinc content of 47wt% of the β phase composition;

[0088] 2. For this reason, use the hot-dip plating method to electroplate a zinc coating with a thickness of 10 μm for a brass wire (female core 6) with a diameter of 1.1 mm and a copper content of 63 wt %;

[0089] 3. Stretch the plated mother blank to 1.0mm;

[0090] 4. Carry out two stages of online continuous diffusion annealing on the 1.0mm mother blank. The annealing temperature of the first stage is 420°C, and the annealing distance is 3 meters, so that the mother core 6 and the surface layer of pure zinc diffuse each other to form the initial ...

Embodiment 3

[0100] 1. Manufacture the electrode wire C whose electrode wire diameter D0 is 0.25 mm. The electrode wire includes a core 2 made of a brass alloy with a copper content of 63 wt%. Phase composition of the transition layer 3, and embedded in the transition layer 3 on the zinc content of 60wt% gamma phase and pits and exposed zinc content of 47wt% of the β phase composition;

[0101] 2. For this reason, adopt the electroplating method to be that the copper content of diameter 1.0mm is the zinc plating layer of 63wt% brass wire electroplating thickness to be 7 μm;

[0102] 3. Stretch the plated mother blank to 0.95mm;

[0103] 4. Carry out step diffusion annealing for the 0.95mm wire billet in the furnace, the annealing temperature of the low temperature section is 175°C, the holding time is 2 hours, the annealing temperature of the high temperature section is 420°C, and the holding time is 2.5 hours;

[0104] 5. After cooling the wire billet to 70°C in the furnace, put it into ...

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Abstract

The invention discloses a wire electrode for WEDM-LS electrical discharge machining and a preparation method of the wire electrode. The wire electrode comprises a core portion, a transition layer, a covering layer and an oxide layer. The core portion is made of brass alloy or red copper. The transition layer covers the outer layer of the core portion and comprises a continuous portion and an interruption portion formed by beta-phase pinchbeck alloy protruding from the continuous portion. The covering layer is formed by the interruption portion formed by the beta-phase pinchbeck alloy, cracked gamma-phase pinchbeck alloy inlaid on the interruption and gaps. The inevitable oxide layer is formed on the surface of the covering layer. The zinc content at the joint between the core portion and the transition layer and the zinc content at the joint between the transition layer and the covering layer are distributed in a linear increase mode. According to the wire electrode with the special tissue structure, the gasification capacity of zinc can be adjusted in the cutting process, cutting efficiency and cutting accuracy are promoted, cost is saved to the largest degree and machining quality is improved.

Description

technical field [0001] The invention relates to an electrode wire for slow wire electric discharge machining (electro discharge machining) and a preparation method thereof. Background technique [0002] Slow wire electric discharge machining is a precision machining method developed rapidly in recent years. It was first invented by former Soviet scholars Lazarenko and his wife in 1943, and then developed rapidly with the improvement of pulse power supply and control system. EDM is a special processing method that uses the electric erosion effect generated by the pulse discharge between the two electrodes immersed in the working fluid to etch away the conductive material. [0003] According to the form of the tool electrode and the characteristics of the relative movement between the workpiece and the workpiece, the EDM methods can be divided into five categories: EDM wire cutting; EDM forming; EDM grinding; EDM conjugate rotary machining; Small hole processing, engraving, ...

Claims

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Application Information

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IPC IPC(8): B23H1/04
Inventor 孟宪旗万林辉林火根
Owner NINGBO BODE HIGHTECH CO LTD
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