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Method for manufacturing grinding wheel work layer with abrasive particle dressing function

A technology of working layer and abrasive grains, applied in grinding devices, manufacturing tools, metal processing equipment, etc., can solve problems such as adverse effects of workpiece materials, rising grinding temperature, and inability to maintain sharpness for a long time.

Active Publication Date: 2013-02-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for making the working layer of the grinding wheel with the self-sharpening function of the abrasive grains, which solves the problem that the grinding wheel cannot maintain the sharpness for a long time during the grinding process, which leads to the increase of the grinding temperature and has an adverse effect on the workpiece material

Method used

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  • Method for manufacturing grinding wheel work layer with abrasive particle dressing function
  • Method for manufacturing grinding wheel work layer with abrasive particle dressing function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: The raw materials used are Cu-Sn-Ti alloy powder 1 (the mass ratio of Cu, Sn, and Ti elements is 7:2:1), polycrystalline cubic boron nitride PCBN abrasive grain 2 (CBN microcrystal 5 and The mass ratio of AlN binder 4 is 9:1), and submicron TiC particles 3 (100nm~5μm). Among them, polycrystalline cubic boron nitride PCBN abrasive particles 2 account for 10% of the total mass of raw materials, TiC particles 3 account for 10% of the total mass of raw materials, and the rest is Cu-Sn-Ti alloy powder. The mixture of the above raw materials is mechanically stirred and put into a powder tablet press to be pressed into a blank, and then vacuum liquid phase sintering is carried out at a heating temperature of 880°C and a holding time of 30 minutes, so that the Ti in the Cu-Sn-Ti alloy The elements react chemically with the CBN microcrystalline particles 5 and the AlN binder 4 in the polycrystalline cubic boron nitride PCBN abrasive grains 2 respectively, firmly hold ...

Embodiment 2

[0027] Example 2: The raw materials used are Cu-Sn-Ti alloy powder 1 (the mass ratio of Cu, Sn, and Ti elements is 7:2:1), polycrystalline cubic boron nitride PCBN abrasive grain 2 (CBN microcrystal and AlN The mass ratio of binder 4 is 9:1), and submicron TiC particles 3 (100nm~5μm). Among them, polycrystalline cubic boron nitride PCBN abrasive particles 2 account for 20% of the total mass of raw materials, TiC particles 3 account for 5% of the total mass of raw materials, and the rest are Cu-Sn-Ti alloy powder. The mixture of the above raw materials is mechanically stirred and put into a powder tablet press to be pressed into a blank, and then vacuum liquid phase sintering is carried out at a heating temperature of 940°C and a holding time of 10 minutes, so that the Ti in the Cu-Sn-Ti alloy The elements react chemically with the CBN microcrystalline particles 5 and the AlN binder 4 in the polycrystalline cubic boron nitride PCBN abrasive grains 2 respectively, firmly hold th...

Embodiment 3

[0028] Example 3: The raw materials used are Cu-Sn-Ti alloy powder 1 (the mass ratio of Cu, Sn, and Ti elements is 7:2:1), polycrystalline cubic boron nitride PCBN abrasive grain 2 (CBN microcrystal and AlN The mass ratio of binder 4 is 9:1), and submicron TiC particles 3 (100nm~5μm). Among them, polycrystalline cubic boron nitride PCBN abrasive grain 2 accounts for 10% of the total mass of raw materials, TiC particles account for 10% of the total mass of raw materials, and the rest is Cu-Sn-Ti alloy powder. The mixture of the above raw materials is mechanically stirred and put into a powder tablet press to form a blank, and then vacuum liquid phase sintering is carried out at a heating temperature of 940°C and a holding time of 10 minutes, so that the Cu-Sn-Ti alloy 1 The Ti element chemically reacts with the CBN microcrystalline particles 5 and the AlN binder 4 in the polycrystalline cubic boron nitride PCBN abrasive grains 2 respectively, firmly holds the polycrystalline cu...

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Abstract

The invention relates to a method for manufacturing a polycrystalline cubic boron nitride (PCBN) grinding wheel work layer with an abrasive particle dressing function, belonging to the manufacture field of superhard grinding material tools. The method comprises the following steps: abrading particles for Cu-Sn-Ti alloy powder and PCBN, fusing TiC particles, preparing a blank and sintering at high temperature. The PCBN abrasive particle is formed by sintering CBN (cubic boron nitride) microcrystalline particles and AlN binder at high temperature and under high pressure. Once the CBN microcrystalline particles are blunt, the junction interface of CBN microcrystalline 5 and AlN binder is weakened along with the rise of the grinding force and the grinding temperature, so that the blunt CBN microcrystalline particles fall, and new CBN microcrystalline particles are quickly exposed to participate in the grinding process. The micro-breaking characteristics of the PCBN abrasive particles cause the superhard grinding material grinding wheel to still keep high sharp degree and avoid the phenomenon that grinding force and grinding temperature rapidly rise.

Description

technical field [0001] The invention relates to a method for manufacturing a working layer of a polycrystalline cubic boron nitride (PCBN) grinding wheel with the self-sharpening function of abrasive grains, and belongs to the field of superhard abrasive tool manufacturing. Background technique [0002] Cubic boron nitride (CBN) is a superhard abrasive obtained by American physical chemist R.H. Wentorf in 1957 by converting hexagonal boron nitride (HBN). The hardness of CBN is second only to diamond, but its thermal stability and chemical inertness are superior to diamond. Superabrasive grinding wheels made of CBN materials have been applied to the grinding of high-strength toughness difficult-to-machine materials represented by nickel-based superalloys. [0003] Although CBN abrasive grains have excellent wear resistance, during the grinding process, due to the strong force-thermal coupling between the workpiece material and the CBN abrasive grains, the CBN abrasive grains...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D18/00B22F3/16B22F7/08
Inventor 丁文锋徐九华张斌傅玉灿苏宏华潘清
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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