Polycrystalline diamond ball grinding machining method

A technology of polycrystalline diamond and diamond abrasive paste, which is applied in metal processing equipment, grinding devices, grinding machine tools, etc., and can solve the problems of polycrystalline diamond balls that cannot meet the standard of roundness and roughness

Inactive Publication Date: 2019-08-16
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The problem to be solved by the present invention is to provide a grinding method for polycrystalline diamond pellets to solve the technical problem in the prior art that the roundness and roughness of small and medium-sized batches of high-hardness polycrystalline diamond pellets cannot reach the standard

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  • Polycrystalline diamond ball grinding machining method
  • Polycrystalline diamond ball grinding machining method
  • Polycrystalline diamond ball grinding machining method

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[0025] A kind of polycrystalline diamond ball grinding processing method, comprises the following steps:

[0026] Coarse grinding:

[0027] Step 1: Evenly apply a layer of diamond grinding paste with a thickness of 0.6mm on the V-shaped groove of the lower grinding disc 4 and the bottom surface of the upper grinding disc 2. The particle size of the grinding paste is W14, and the material of the upper and lower grinding discs is cemented carbide.

[0028] Step 2: Put the polycrystalline diamond ball 1 with a radius r of 0.5mm into the V-shaped groove of the lower grinding disc 4, wherein the included angle θ in the V-shaped groove is 90°, and the side length l is 0.7mm.

[0029] Step 3: The upper grinding disc 2 is connected to the equipment base 5 through the guide post 3, and a pressure is applied on its upper surface at the same time, so that the pressure on a single polycrystalline diamond ball is 28N.

[0030] Step 4: Keep the upper grinding disc 2 fixed, and the lower gr...

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Abstract

The invention belongs to the technical field of diamond ball manufacturing, and discloses a polycrystalline diamond ball grinding machining method. The polycrystalline diamond ball grinding machiningmethod comprises two working procedures of rough grinding and fine grinding. Firstly, a layer of diamond grinding paste is evenly applied on a V-shaped groove of a lower grinding disc and the bottom surface of an upper grinding disc; secondly, polycrystalline diamond balls are put into the V-shaped groove of the lower grinding disc; thirdly, the upper grinding disc is connected with a device basethrough guide pillars, a pressure force F is applied to the upper surface at the same time, meanwhile the upper grinding disc is fixed, the lower grinding disc rotates, and the polycrystalline diamondballs are driven to rotate and revolve to finish rough grinding and fine grinding machining; and finally, the fine-machined polycrystalline diamond balls are cleaned and dried, and roundness and surface roughness are detected. The machining method can ensure that the roundness and surface roughness of the small balls meet machining requirements, the structure of a machining device is simple, themachining period is short, precision is high, and the method is suitable for grinding and polishing a small batch of sphere parts with high hardness and small size.

Description

technical field [0001] The invention belongs to the technical field of diamond ball manufacturing, and in particular relates to a method for grinding and processing polycrystalline diamond balls. Background technique [0002] Polycrystalline diamond balls are the key parts of ultra-precision bearings, which are widely used in aerospace equipment and military cutting-edge equipment such as Shenzhou spacecraft and Chang'e lunar probe. Due to the particularity of the material, the polycrystalline diamond ball has anisotropy, high hardness, and its small size (diameter less than 3mm), making it very difficult to process. [0003] At present, the processing methods of ordinary spherical parts include turning, milling and grinding and polishing. Turning and milling are mainly for larger parts. The processing technology is simple, but the parts need to be processed one by one. The processing efficiency is low, and it is difficult to process steel balls with high hardness. Grinding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B1/00B24B37/025
CPCB24B1/00B24B37/025
Inventor 张振宇廖龙兴孟凡宁孟祥东
Owner DALIAN UNIV OF TECH
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