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Hot-pressing high-strength ceramic CBN grinding wheel for grinding aerospace titanium alloy and preparation method

A technology for aerospace and titanium alloys, which is applied in the field of grinding and processing, and can solve the problems of reducing the content of binders and poor fluidity of high-strength binders.

Active Publication Date: 2020-10-23
江苏赛扬精工科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grinding wheel uses a higher-strength bond, which can increase the service life of the grinding wheel, and at the same time reduce the content of the bond by 20-25%, greatly improving the edge rate of the abrasive wheel and increasing the sharpness of the grinding wheel; on the other hand, using hot pressing process , to solve the problem of poor fluidity of high-strength binder, to make the contact force between CBN and binder larger, so as to ensure the holding force of the binder on the CBN abrasive during sintering

Method used

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  • Hot-pressing high-strength ceramic CBN grinding wheel for grinding aerospace titanium alloy and preparation method
  • Hot-pressing high-strength ceramic CBN grinding wheel for grinding aerospace titanium alloy and preparation method
  • Hot-pressing high-strength ceramic CBN grinding wheel for grinding aerospace titanium alloy and preparation method

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Experimental program
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Effect test

Embodiment 1

[0034] The steel matrix of the grinding wheel is conventionally heat-treated before use, and the required shape is fine-turned for the bonding of ceramic CBN grinding wheel blocks, which is a conventional method.

[0035] The ceramic CBN grinding wheel block is prepared from CBN abrasive, vitrified bond, white corundum and phenolic resin powder. Concrete preparation process is as follows:

[0036] (1) Weigh silicon dioxide, borax, aluminum oxide, titanium dioxide, and barium oxide according to the weight percentage of 53:27:6:10:4, and mix them well; then put the mixture into a frit furnace at 1550 °C Carry out conventional smelting; then water-cool the smelted mixture and grind it into powder with a ball mill; finally dry it through a 60-mesh sieve to obtain the required vitrified bond;

[0037] (2) Weigh the CBN abrasive, the above vitrified bond, white corundum and phenolic resin powder according to the weight percentage of 73:12:10:5, and mix them thoroughly; the specific...

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Abstract

The invention discloses a hot-pressing high-strength ceramic CBN grinding wheel for grinding aerospace titanium alloy and a preparation method. The hot-pressing high-strength ceramic CBN grinding wheel is composed of a steel substrate and a CBN grinding material layer. A CBN grinding material layer adhesive is a high-strength ceramic bonding agent, compared with an existing ceramic bonding agent,the use amount can be reduced by 20%, the grinding material edge rate of the grinding wheel is effectively increased, and the sharpness of the grinding wheel is improved. Meanwhile, the grinding wheeladopts a hot-pressing process, the defect that the high-strength bonding agent is poor in fluidity is overcome, the contact force between CBN and the bonding agent is larger, and the holding force ofthe bonding agent to CBN grinding materials during sintering is guaranteed. Compared with a universal ceramic CBN grinding wheel, the grinding wheel is higher in efficiency and longer in service lifewhen used for grinding titanium alloy workpieces for aerospace.

Description

technical field [0001] The invention belongs to the technical field of grinding, and in particular relates to a hot-pressed high-strength ceramic CBN grinding wheel for grinding titanium alloy special for aerospace. Background technique [0002] Titanium alloy is a composite metal composed of titanium metal as the basis and adding other elements (such as tin, vanadium, aluminum, niobium and molybdenum, etc.). Titanium alloy has high strength, low density, good mechanical properties, good toughness and corrosion resistance, so it is widely used in various fields, especially in the aerospace industry. However, the processing performance of titanium alloy is poor, the efficiency is low, and the production and processing technology is complicated. Traditionally, the grinding wheel used for grinding titanium alloys uses corundum as the abrasive, which has problems such as low efficiency and poor surface quality of the workpiece. As a new type of superabrasive, cubic boron nitri...

Claims

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Application Information

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IPC IPC(8): B24D3/14B24D3/34B24D18/00
CPCB24D3/14B24D3/342B24D3/346B24D18/0009
Inventor 李伟超王媛媛
Owner 江苏赛扬精工科技有限责任公司
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