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Preparation method of diamond-nickel composite coating electrosparking electrode

A composite coating and composite electrode technology, which is applied in the field of preparation of diamond-nickel composite coating EDM electrodes, can solve the problems of electrode length and side loss, and achieve improved side loss, low electron work function, and good thermal conductivity. Effect

Pending Publication Date: 2022-05-24
SHAANXI RAILWAY INST
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  • Abstract
  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a diamond-nickel composite coating electric discharge machining electrode, which solves the serious problems of electrode length and side loss in the prior art

Method used

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  • Preparation method of diamond-nickel composite coating electrosparking electrode
  • Preparation method of diamond-nickel composite coating electrosparking electrode
  • Preparation method of diamond-nickel composite coating electrosparking electrode

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Embodiment Construction

[0027] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Diamond - nickel composite coating electrode preparation method, such as Figure 1 as shown, follow these steps:

[0029] Step 1: Pretreat the diamond powder;

[0030] Step 1 is specifically: pickling and alkali washing of diamond powder, then washing with deionized water, and finally drying for later use;

[0031] The particle size of the diamond powder is 10 μm.

[0032] Because the diamond powder in the production and processing will be mixed with trace amounts of iron catalyst, organic matter and oil, etc., these impurities will reduce the plating speed and will destroy the bonding strength of the coating and the workpiece, and sometimes even lead to the failure of electrode preparation, so the diamond powder must be pretreated before preparing the composite electrode.

[0033] Step 2: Pretreatment of metal-based electrodes;

[0034] Step 2 ...

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Abstract

The preparation method of the diamond-nickel composite coating electric spark machining electrode is specifically implemented according to the following steps that 1, diamond micro powder is pretreated; step 2, pretreating the metal-based electrode; 3, the diamond micro-powder nickel pre-sulfate solution pretreated in the step 1 is mixed to prepare a plating solution, the metal-based electrode pretreated in the step 2 is placed in the plating solution for chemical composite plating, and a composite electrode is obtained; and step 4, drying the composite electrode to obtain the composite electrode. Diamond and nickel metal with high electric corrosion resistance are plated on a metal base electrode in a chemical composite plating mode, the electric spark machining composite electrode with high electric corrosion resistance is prepared, and the electrode can effectively reduce length loss and side surface loss and improve machining precision.

Description

Technical field [0001] The present invention belongs to the technical field of preparation methods for EDM electrodes, specifically relates to diamond - nickel composite coating electrode preparation method. Background [0002] EDM is a special processing method that relies on the instantaneous high temperature generated during discharge to melt and vaporize local metals, which has the unique advantages of non-contact processing, not limited by material strength and hardness, and high processing accuracy, so that it is more and more widely used in aerospace, transportation and mold manufacturing and other industrial fields of difficult to process materials efficient precision machining and micro-fine processing. In addition, the EDM method is also indispensable for microporous machining, milling of fine three-dimensional structures, and precision mold processing. However, the significant electrode length loss and side loss in the process of EDM small hole machining seriously affe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/34C25D5/50C25D5/00
CPCC25D5/34C25D5/50C25D5/00
Inventor 王文建毛红梅郭军拜颖乾
Owner SHAANXI RAILWAY INST
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