Preparation method of diamond wire saw with composite coating

A technology of diamond wire saw and composite coating, applied in the direction of coating, electrolytic coating, etc., can solve the problems of insufficient diamond holding force, poor sharpness of diamond wire saw, easy agglomeration of diamond particles, etc., to achieve good cutting effect, Improved chip space, machining efficiency, and good sharpening performance

Inactive Publication Date: 2018-06-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the existing diamond wire saws are prone to agglomeration of diamond particles during the sanding process, and the sharpness of the diamond wire saw is not good, and the diamond holding force is not enough, the present invention provides a method for preparing a composite coated diamond wire saw, Diamond abrasive grains with composite coating are used as wire saw abrasive grains for electroplating, and the hydrophilic properties of the surface aluminum oxide layer are used to solve the agglomeration phenomenon of diamond wire saws during the sanding process. The electrical insulation properties of the coating can avoid metal nickel on the top of the abrasive grains. deposits, improving the sharpness of the wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A composite coating diamond wire saw, which is prepared by the following method:

[0028] Step 1. Preparation of composite diamond coating abrasive grains

[0029] First use 25g / L nickel sulfate hexahydrate, 21g / L sodium hypophosphite, 0.5mol / L lactic acid, 0.01mol / L palladium chloride to prepare a plating solution, and adjust the PH value with ammonia water to add a certain amount of W7 diamond (After pretreatment), add it to the pre-prepared plating solution. A constant temperature magnetic stirrer is used to perform a 60°C constant temperature water bath, and ammonia water is used to control the pH value to obtain nickel-plated diamond. And deposit aluminum hydroxide on the surface in a 0.10M aluminum nitrate solution with a pH of 5, and keep it at 300°C for 1 hour to convert the surface layer of aluminum hydroxide into aluminum oxide, which is used for thickening plating of metal saw wires .

[0030] Step two, pretreatment of metal saw wire

[0031] Use dilute hydrochlor...

Embodiment 2

[0038] A composite coating diamond wire saw, which is prepared by the following method:

[0039] Step 1. Preparation of composite diamond coating abrasive grains

[0040] A certain amount of W10 diamond that has been activated in advance is put into a plating solution of 25 g / L nickel sulfate hexahydrate, 21 g / L sodium hypophosphite, and 0.5 mol / L lactic acid. The pH of the plating solution is adjusted with ammonia water. A constant temperature magnetic stirrer was used to perform a 60°C constant temperature water bath to obtain nickel-plated diamonds. And deposit aluminum hydroxide on the surface in a 0.15M molar concentration of aluminum nitrate solution with a pH of 5.5, and keep it at 300°C for 1 hour to convert the surface layer of aluminum hydroxide into aluminum oxide for thickening plating of metal saw wires .

[0041] Step two, pretreatment of metal saw wire

[0042] Use dilute hydrochloric acid to derust the surface of the piano wire of 100 microns, and then use alkaline d...

Embodiment 3

[0049] A composite coating diamond wire saw, which is prepared by the following method:

[0050] Step 1. Preparation of composite diamond coating abrasive grains

[0051] First use 25g / L nickel sulfate hexahydrate, 21g / L sodium hypophosphite, 0.5mol / L lactic acid, 0.01mol / L palladium chloride to prepare the electroplating solution, and adjust the pH value with ammonia water to add a certain amount of W7 diamond (After pretreatment), add it to the pre-prepared plating solution. A constant temperature magnetic stirrer is used to perform a 60°C constant temperature water bath, and ammonia water is used to control the pH value to obtain nickel-plated diamond. And deposit nickel hydroxide on the surface in a 0.10M molar concentration of nickel nitrate solution with a pH of 4.5, and keep it at 550°C for 1 hour to convert the surface layer of nickel hydroxide into nickel oxide, which is used for thickening plating of metal saw wires .

[0052] Step two, pretreatment of metal saw wire

[0...

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Abstract

The invention discloses a preparation method of a diamond wire saw with a composite coating. The diamond wire saw is subject to rust removal, oil removal and activation treatment by a steel wire ropeto serve as a plated base body; a diamond adopting nickel plating/aluminum oxide or nickel plating/nickel oxide is used as grinding materials, a low-phosphorus nickel coating is prepared on the surface of the pretreated diamond through a chemical plating method, an aluminum oxide or nickel oxide layer is prepared on the surface of the nickel through a chemical precipitation method, and in a nickelelectroplating tank, the diamond wire saw with the composite coating is prepared through the sand feeding and thickening process. The preparation method is effective, high in yield, high in wire-making speed and high in production efficiency; the diamond wire saw with the composite coating has the advantages of being good in cutting edge performance, good in cutting performance, long in service life, high in utilization rate of diamond wire saw, wide in cutting range, capable of machining planes and curved surfaces and the like, and can be widely applied to the fields of military, civilian and other precise machining.

Description

Technical field [0001] The invention relates to a diamond wire saw, in particular to a preparation method of a composite coating diamond wire saw. Background technique [0002] Hard and brittle materials, especially ceramic materials and semiconductor materials (such as silicon crystal, optical glass, sapphire, engineering ceramics and quartz crystal, etc.), due to their high hardness, good wear resistance, high temperature resistance, corrosion resistance and other excellent properties or special The optoelectronic properties of the light are increasingly widely used in many fields such as electronics, optics, and aerospace. Slicing is at the forefront of the entire manufacturing process and has a significant impact on product processing quality and manufacturing costs. [0003] Diamond wire saw is a kind of processing tool that uses electroplating process or resin bonding method to plate (coating) a layer of binder on the metal wire to consolidate the diamond abrasive on the met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D15/00C25D7/06
CPCC25D15/00C25D7/0607
Inventor 朱永伟金振弘牛凤丽汪忠喜陈佳鹏李军左敦稳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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