A kind of diamond grinding wheel and preparation method thereof

A diamond grinding wheel and diamond technology, used in metal processing equipment, manufacturing tools, grinding/polishing equipment, etc., can solve problems such as high operating temperature, chip adhesion and blockage, grinding wheel failure, etc., to improve grinding speed and reduce power. Loss, good machining accuracy

Active Publication Date: 2020-11-03
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional superhard abrasives (grinding wheels) are mostly manufactured by resin, ceramics, metal bond sintering and electroplating. The problem is that single crystal particles are only mechanically embedded in the bond and electroplating layer, and bond and Weak force between plating layers
Specifically, although the resin bond is relatively easy to process and repair, it has poor heat resistance, low bonding strength, serious abrasive shedding, and seriously affects efficiency; the vitrified bond is relatively easy to repair and has a high service temperature, but it is brittle and impact toughness. Poor fatigue, prone to brittle cracking, difficult to use in high-speed machining
Although metal bond sintering has strong heat resistance, chemical metallurgical bonding cannot occur between the bond and the abrasive grains, so the abrasive grains are only mechanically embedded in the bond with limited holding power; abrasive grains in metal electroplating are only mechanically embedded
Therefore, it is easy to cause the overall failure of the grinding wheel due to the particle shedding of the abrasive and the peeling off of the coating in flakes. This situation is especially obvious when the more difficult-to-process materials are efficiently ground; in addition, the coating is thick, the exposure height of the abrasive is low, and the chip space is small. , it is easy to fail due to the adhesion and clogging of chips during grinding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A diamond grinding wheel, which includes a steel core, an abrasive ring, the steel core and the abrasive ring are combined by a resin adhesive, wherein the abrasive ring is prepared from the following components by mass percentage: diamond abrasive: 45%, metal bond : 45%, auxiliary binder: 10%, the sum of the mass percentage of diamond abrasive, metal bond and auxiliary binder is 100%; the mass percentage of the metal bond contains: Cu powder: 50%, Ti powder: 50%, the sum of the mass percentages of Cu powder and Ti powder is 100%; the composition of the abrasive ring is by volume percentage: 42% diamond abrasive, 38% metal bond, 20% pores, diamond abrasive, metal bond and pores The sum of volume percentages is 100%; the particle diameters of the diamond abrasive, Cu powder and Ti powder are all 50 μm; the auxiliary binder is acrylic emulsion.

[0038] The preparation method of above-mentioned diamond grinding wheel, comprises the steps:

[0039] Step 1, mixing ingredie...

Embodiment 2

[0055] A diamond grinding wheel, which includes a steel core, an abrasive ring, the steel core and the abrasive ring are combined by a resin adhesive, wherein the abrasive ring is prepared from the following components by mass percentage: diamond abrasive: 45%, metal bond : 40%, auxiliary binder: 15%, the sum of the mass percentage of diamond abrasive, metal bond and auxiliary binder is 100%; the mass percentage of the metal bond contains: Cu powder: 50%, Ti powder: 50%, the sum of the mass percentages of Cu powder and Ti powder is 100%; the composition of the abrasive ring is by volume percentage: 42% diamond abrasive, 33% metal bond, 25% pores, diamond abrasive, metal bond and pores The sum of volume percentages is 100%; the particle diameters of the diamond abrasive, Cu powder and Ti powder are all 100 μm; the auxiliary binder is acrylic acid emulsion.

[0056]The preparation method of above-mentioned diamond grinding wheel, comprises the steps:

[0057] Step 1, mixing ing...

Embodiment 3

[0073] A diamond grinding wheel, which includes a steel core, an abrasive ring, and the steel core and the abrasive ring are combined by a resin adhesive, wherein the abrasive ring is prepared from the following components by mass percentage: diamond abrasive: 40%, metal bond : 40%, auxiliary binder: 20%, the sum of the mass percentage of diamond abrasive, metal bond and auxiliary binder is 100%; the mass percentage of the metal bond contains: Cu powder: 55%, Ti powder: 45%, the sum of the mass percentages of Cu powder and Ti powder is 100%; the composition of the abrasive circle is: 38% diamond abrasive, 32% metal bond, 30% pores, diamond abrasive, metal bond and pores The sum of volume percentages is 100%; the particle diameters of the diamond abrasive, Cu powder and Ti powder are all 150 μm; the auxiliary binder is acrylic emulsion.

[0074] The preparation method of above-mentioned diamond grinding wheel, comprises the steps:

[0075] Step 1, mixing ingredients:

[0076]...

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Abstract

The invention relates to a diamond grinding wheel and a preparation method thereof and belongs to the field of superhard abrasives. The diamond grinding wheel comprises a steel core and an abrasive ring which are bonded through a resin binder and a resin adhesive binder. The abrasive ring is prepared from a diamond abrasive, a metal binder and an auxiliary binder. The metal binder contains Cu powder and Ti powder. The abrasive ring is constituted by the diamond abrasive, the metal binder and pores. The preparation method comprises the steps that (1) the diamond abrasive, the Cu powder and theTi powder are evenly mixed, and a mixture A is prepared; (2) the auxiliary binder and the mixture A are evenly mixed, and a mixture B is prepared; (3) the mixture B is dried; (4) the dried mixture B is screened; (5) the screened mixture B is subjected to cold press molding; (6) a green blank of the abrasive ring is sintered under an inert gas atmosphere, and then a blank of the abrasive ring is prepared; and (7) the blank of the abrasive ring and the steel core are bonded through the resin binder, and the diamond grinding wheel is prepared.

Description

technical field [0001] The invention relates to the field of superhard abrasives, in particular to a diamond grinding wheel and a preparation method thereof. Background technique [0002] With the development of modern machining in the direction of high precision, high speed, hard machining, dry machining (no coolant) and cost reduction, quite high requirements are put forward for the performance of abrasive tools. Traditional silicon carbide and corundum ordinary abrasive molds can no longer fully meet the current high-speed, high-efficiency, and high-precision grinding requirements. Therefore, it is an inevitable development to develop various superhard grinding materials with excellent wear resistance and stable processing for a long time trend. Currently commonly used superhard grinding materials include diamond and cubic boron nitride abrasives. Diamond is the hardest material and is extremely wear-resistant, suitable for high-speed grinding and ultra-precision grindi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/06B24D3/34B24D18/00
CPCB24D3/06B24D3/342B24D3/346B24D18/0009
Inventor 王聪范永刚
Owner NORTHEASTERN UNIV LIAONING
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