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Electroplating liquid for preparing nickel plating thorn abrasive grains and electroplating method

A technology of electroplating solution and abrasive grains, which is applied in the field of electroplating solution, can solve the problems affecting the quality of the workpiece, scratches, low adhesion, etc., and achieve the effect of dense coating structure, increased service life and firm combination

Active Publication Date: 2015-09-09
北京国瑞升精机科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, ordinary nickel-plated diamond abrasive grains have the following problems: when used in resin-bonded abrasives, the bonding force between ordinary nickel-plated diamond abrasive grains and the resin bond is low, and the abrasive grains are easily removed from the resin bond. Falling off, resulting in low service life of the abrasive tool, and easy to produce scratches on the surface of the workpiece, affecting the quality of the workpiece
[0010] Other electroplating solution formulations and nickel-plating process methods for nickel thorn plating on the abrasive grain surface have not been reported.

Method used

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  • Electroplating liquid for preparing nickel plating thorn abrasive grains and electroplating method
  • Electroplating liquid for preparing nickel plating thorn abrasive grains and electroplating method
  • Electroplating liquid for preparing nickel plating thorn abrasive grains and electroplating method

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Embodiment 1: the preparation method of 20 μ m nickel-plated thorny diamond abrasive grains

[0056] Step 1. Get 1000ct of diamond (single crystal diamond) abrasive grains with a particle size of 20 μm, add 1 L of 1 g / L tin protochloride solution, perform sensitization treatment for 20 min, and clean to obtain sensitized diamond;

[0057] Step 2. Add 1 L of 1 g / L palladium chloride solution to the sensitized diamond obtained in step 1, activate it for 20 minutes, and wash to obtain activated diamond;

[0058] Step 3. Add 1 L of 20 g / L sodium hypophosphite solution to the activated diamond obtained in step 2, perform reduction treatment for 20 minutes, and wash to obtain reduced diamond;

[0059] Step 4, preparing 4L of pre-plating solution, the concentration of each component is: nickel sulfate 25g / L, sodium citrate 10g / L, sodium acetate 10g / L, sodium hypophosphite 20g / L;

[0060] Pour the reduced diamond obtained in step 3 into the pre-plating solution and stir evenly...

Embodiment 2

[0065] Example 2: Preparation method of 30 μm nickel-plated thorny cubic boron nitride abrasive grains

[0066] Step 1. Take 1000 ct of cubic boron nitride abrasive grains with a particle size of 30 μm, add 2 L of 0.5 g / L stannous chloride solution, perform sensitization treatment for 30 minutes, and wash to obtain sensitized cubic boron nitride;

[0067] Step 2. Add 2L of 0.5g / L palladium chloride solution to the sensitized cubic boron nitride obtained in step 1, activate it for 30 minutes, and wash to obtain activated cubic boron nitride;

[0068] Step 3. Add 2 L of 30 g / L sodium hypophosphite solution to the activated cubic boron nitride obtained in step 2, perform reduction treatment for 30 minutes, and wash to obtain reduced cubic boron nitride;

[0069] Step 4, preparing 4L of pre-plating solution, the concentration of each component is: nickel sulfate 250g / L, sodium citrate 100g / L, sodium acetate 100g / L, sodium hypophosphite 200g / L;

[0070] Pour the reduced cubic boro...

Embodiment 3

[0075] Embodiment 3: the preparation method of 50 μ m nickel-plated thorny diamond abrasive grains

[0076] Step 1, get 1000ct of diamond (polycrystalline diamond) abrasive grains with a particle size of 50 μm, add 1L of stannous chloride solution of 1.5g / L, perform sensitization treatment for 40min, and clean to obtain sensitized diamond;

[0077] Step 2. Add 1L of 1.5g / L palladium chloride solution to the sensitized diamond obtained in step 1, activate it for 40 minutes, and wash to obtain activated diamond;

[0078] Step 3. Add 1 L of 30 g / L sodium hypophosphite solution to the activated diamond obtained in step 2, perform reduction treatment for 40 min, and wash to obtain reduced diamond;

[0079] Step 4, prepare pre-plating solution 4L, the concentration of each composition in every liter is: nickel sulfate 375g / L, sodium citrate 150g / L, sodium acetate 150g / L, sodium hypophosphite 300g / L;

[0080] Pour the reduced diamond obtained in step 3 into the pre-plating solution ...

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Abstract

The invention relates to electroplating liquid for preparing nickel plating thorn abrasive grains and an electroplating method; and the electroplating liquid contains water solution of the following components: nickel sulfate, boric acid, sodium chloride, aminobenzenesulfonic acid and benzene sulfinic acid sodium salt. The nickel plating thorn abrasive grains, prepared by the electroplating liquid, have a lot of needle-shaped or rod-shaped nickel thorns on the surfaces; the binding force of the nickel plating thorn abrasive grains and a resin binding agent is improved by 50-200% compared with general nickel plating abrasive grains; and the service life of resin binding agent abrasive tools, prepared by the product, is prominently prolonged.

Description

technical field [0001] The invention relates to an electroplating solution, in particular to an electroplating solution and an electroplating method for producing nickel-plated abrasive grains. Background technique [0002] Diamond has a series of excellent physical and chemical properties such as high hardness, high strength, high wear resistance and small linear expansion coefficient, and has been increasingly widely used in the field of grinding. However, under normal temperature and pressure, diamond is in a metastable state, its heat resistance is not high, and there are some surface defects. During the processing, reactions such as oxidation weight loss or graphitization often occur, thereby reducing processing efficiency. In addition, because the diamond abrasive grains and the bonding agent in the abrasive tool are generally inlaid mechanically, the diamond abrasive grains are easy to fall off under the action of the grinding force, which greatly reduces the service ...

Claims

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Application Information

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IPC IPC(8): C25D3/12C25D5/54
Inventor 张恒
Owner 北京国瑞升精机科技有限公司
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