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Manufacturing method of ceramic PCD grinding wheel

A manufacturing method and grinding wheel technology, applied in the manufacture of tools, abrasives, grinding devices, etc., can solve the problems of weak grinding wheel strength, easy cracking of grinding wheels, difficulty in manufacturing PCD grinding wheels, etc., and achieve the effect of improving mechanical strength.

Inactive Publication Date: 2015-04-22
廖云建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since cristobalite is a crystallization of SiO2, its volume will expand rapidly at 100-200°C, so PCD grinding wheels fired with boron glass as a bond are prone to cracks, and the strength of the grinding wheel is greatly weakened, making ceramics with boron glass bond Manufacture of bonded PCD grinding wheels becomes difficult
[0004] In the prior art, it is known that mullite (aluminum-silicon mineral) can be used to suppress the formation of cristobalite, but the addition of mullite does not significantly improve the mechanical strength of the grinding wheel, and the tensile strength of the grinding wheel cannot be effectively improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (A) Wafer size: 10.5×T12(mm)

[0036] (B) input weight: 1.5g

[0037] (C) Firing conditions:

[0038] Maximum temperature 800°C (air atmosphere)

[0039] Room temperature → 550°C for 6.5 hours

[0040] 550℃→600℃ for 3.0 hours

[0041] 600°C→800°C for 2.0 hours

[0042] The highest temperature is 800°C for 7.0 hours

[0043] 800°C → 400°C natural cooling for about 7.0 hours

[0044] 400°C → forced cooling at room temperature for about 2.5 hours

[0045] Maximum temperature 800°C (nitrogen atmosphere)

[0046] Room temperature→550℃ for 7.5 hours (air atmosphere)

[0047] 550℃→600℃ for 3.0 hours (air atmosphere)

[0048] 600°C for 1.5 hours (replaced with nitrogen atmosphere)

[0049] 600°C→800°C for 2.0 hours (nitrogen atmosphere)

[0050] The maximum temperature is 800°C for 7.0 hours (nitrogen atmosphere)

[0051] 800°C → 400°C natural cooling for about 7.0 hours (nitrogen atmosphere)

[0052] 400°C → Forced cooling at room temperature for about 2.5 hours (...

Embodiment 2

[0054] (A) Wafer size: 25.4×T20(mm)

[0055] (B) input weight: 15g

[0056] (C) Firing conditions:

[0057] Maximum temperature 800°C (air atmosphere)

[0058] Room temperature→550℃ for 7.5 hours

[0059] 550℃→600℃ for 3.0 hours

[0060] 600°C→800°C for 2.0 hours

[0061] The highest temperature is 800°C for 7.0 hours

[0062] 800°C → 400°C natural cooling for about 7.0 hours

[0063] 400°C → forced cooling at room temperature for about 2.5 hours

[0064]According to the conditions listed in Example 2, cut out 5 × 5 × 20 (mm) sample blocks from the samples fired by the test binders 1 and 3 of Example 1, raise the temperature at a temperature rate of 5.5°C / min, and use a Rigaku motor The change in thermal expansion was measured with a thermal dilatometer (TAS100) manufactured by Co., Ltd. As a result, the test adhesive 1 exhibited a rapid thermal expansion phenomenon between 100°C and 20°C, while the experimental adhesive agent 3 did not exhibit a rapid thermal expansio...

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PUM

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Abstract

The invention discloses a manufacturing method of a ceramic PCD grinding wheel. The manufacturing method comprises the following steps that borosilicate glass is added to diamond grinding particles, aluminum borate whiskers are added to the mixture, and the mixture is sintered under the sintering temperature ranging from 650 DEG C to 950 DEG C. By means of the method, the purposes of effectively improving the mechanical strength and tensile strength of the grinding wheel can be achieved.

Description

technical field [0001] The invention relates to a method for manufacturing a grinding wheel, in particular to a method for manufacturing a ceramic PCD grinding wheel. Background technique [0002] Abrasive grains made of diamond (hereinafter referred to as PCD) have high hardness and are collectively referred to as superabrasives like cubic boron nitride abrasive grains. PCD abrasive grains are widely used in the manufacture of grinding wheels for grinding cemented carbide materials and PCD or CBN cutter grains. In the manufacture of grinding wheels, PCD abrasive grains are easy to deteriorate when fired at a high temperature above 950°C. Therefore, a low melting point binder must be used, and it will not deteriorate when fired at a temperature below 950°C. In addition, we also know that the grinding wheel with the highest strength can be obtained by firing at 650-950°C, and the wettability with abrasive grains is good. The above-mentioned bonding agent is boron glass bondi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D18/00B24D3/18C03C14/00
CPCB24D18/009C04B35/52C04B35/6303C04B2235/3217C04B2235/365C04B2235/3826C04B2235/5276C04B2235/6567
Inventor 廖云建
Owner 廖云建
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