Grinding wheel for roughing and thinning mobile phone backboard glass and preparation method of grinding wheel

A backplane glass, mobile phone technology, applied in manufacturing tools, metal processing equipment, grinding/polishing equipment, etc., can solve the problems of low strength and low life, and achieve improved life, increased control, good sharpness and resistance. deformable effect

Pending Publication Date: 2022-04-22
赛尔科技(如东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing copper bonded grinding wheel has low bond strength and low service life

Method used

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  • Grinding wheel for roughing and thinning mobile phone backboard glass and preparation method of grinding wheel
  • Grinding wheel for roughing and thinning mobile phone backboard glass and preparation method of grinding wheel
  • Grinding wheel for roughing and thinning mobile phone backboard glass and preparation method of grinding wheel

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0018] Three-dimensionally mix diamond (400#) with epoxy resin and 1-3μm copper-tin-titanium (70-15-15) alloy powder in an acetone environment for 60 minutes, then dry and sieve through 60 meshes to obtain packages with uniform particle size The diamond particles of the alloy powder are used in the following examples; the mass ratio of diamond and copper-tin-titanium alloy powder is 2.5:1, and the epoxy resin is 1% of the total mass of diamond and copper-tin-titanium alloy powder.

[0019] The following grinding wheel preparation process:

[0020] (1) Material mixing: According to the formula requirements of a certain proportion, put the precisely weighed copper powder, tin powder, and cobalt powder into the tank in turn, perform ball milling, add 25% alcohol in total mass, and then put steel balls, The ratio of ball to material is 2:1 (wt.%), the rotation speed is 500rpm, and the ball mill is 60min. Take out the ball material, scrape off all the material on the inner wall of...

Embodiment 1

[0025] Accurately weigh 62% copper powder, 17.5% tin powder, and 20.5% cobalt powder, ball mill several raw materials to form a binder, and mix with diamond wrapped in alloy powder at a volume ratio of 70%: 30% to prepare molding materials. Weigh the molding material according to the unit weight requirements, and carry out pressing, sintering and shape processing. Thinning processing of glass with a size of 150*75, within the processing life, the split rate is 1.02%, and the processing life of the grinding wheel can reach 1500pcs (pieces). See the product photo after processing figure 1 .

Embodiment 2

[0027] Accurately weigh 65.5% copper powder, 16.1% tin powder, and 18.4% cobalt powder, and ball-mill several raw materials to form a binder, which is mixed with diamond wrapped in alloy powder at a volume ratio of 70%: 30% to prepare molding materials. Weigh the molding material according to the unit weight requirements, and carry out pressing, sintering and shape processing. Thinning processing of glass with a size of 150*75, within the processing life, the split rate is 1.22%, and the processing life of the grinding wheel can reach 1300pcs. After processing, see the photo of the product figure 2 .

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Abstract

The invention belongs to a thinning tool, and particularly relates to a grinding wheel for roughing and thinning mobile phone backboard glass and a preparation method of the grinding wheel. Diamond, epoxy resin and copper-tin-titanium alloy powder are mixed, and diamond particles wrapped with the alloy powder are obtained; then mixing the diamond particles wrapped with the alloy powder with the ball-milled metal matrix to obtain a material; and the material is subjected to cold pressing and sintering, and the grinding wheel for roughing and thinning the mobile phone backboard glass is obtained. According to the grinding wheel for roughing and thinning the mobile phone backboard glass, the diamond is subjected to surface brazing pretreatment, the holding performance of a binding agent on the diamond is improved, meanwhile, cobalt is added to be combined with copper and tin for modification, good sharpness and deformation resistance are achieved, and the service life of the grinding wheel for roughing and thinning the mobile phone backboard glass can be greatly prolonged in the aspect of practical application.

Description

technical field [0001] The invention belongs to a thinning tool, in particular to a grinding wheel for roughening and thinning the glass of a mobile phone back panel and a preparation method thereof. Background technique [0002] With the rapid development of the mobile phone communication industry, mobile phones are also being updated rapidly, and the performance is constantly improving. Because the original metal shell has a strong shielding effect on the signal, glass and ceramic materials have become the main backup solutions. Ceramics are due to their high hardness and brittleness. As a result, the production and processing are difficult, so the back cover of the mobile phone made of glass is widely used. As a brittle material, glass has certain requirements for processing tools. The prior art discloses a resin cermet ternary composite binder superhard grinding wheel, which is mainly made of the following raw materials in weight percentage: 15-35% polyimide resin powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/10B24D3/34B24D18/00B22F5/00B22F3/02B22F3/10C22C9/02C22C9/06C22C26/00B22F1/18B22F9/04
CPCB24D3/10B24D3/342B24D18/0009B22F5/00B22F3/02B22F3/1017C22C9/02C22C9/06C22C26/00B22F9/04B22F2005/001B22F2009/043
Inventor 冉隆光张莹莹马百福吴强
Owner 赛尔科技(如东)有限公司
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