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A special metal-ceramic CBN grinding wheel for end face ultra-fine grinding and preparation method thereof

A cermet and ultra-fine grinding technology, used in metal processing equipment, grinding/polishing equipment, abrasives, etc., can solve the problems of grinding wheel failure, short service life, easy sticking of grinding wheels, etc., and achieve accurate control of porosity, The effect of reducing sticky chips and workpiece burns, good chip holding and chip evacuation

Inactive Publication Date: 2016-03-09
SUZHOU SAILI PRECISION TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the needs of industrial development and the continuous breakthrough and innovation of material science, various new materials with high strength, high hardness, corrosion resistance and high temperature resistance have emerged as the times require. These materials are relatively difficult to process, especially in the process of precision grinding. The grinding wheel is easy to stick chips, and even cause burns to the workpiece. Currently, bonded abrasive wheels and electroplated grinding wheels are used more. The bonded abrasive wheels manufactured by traditional technology, especially the grinding wheels for precision and ultra-precision grinding, are very easy to block the working surface. It is easy to cause premature failure of the grinding wheel or burn the workpiece, which seriously affects the processing quality and processing efficiency of the workpiece; although the electroplated grinding wheel occupies an important position in modern grinding technology, there are also problems that the electroplating layer is too thick, which can easily cause the grinding wheel to block and shorten the service life. Short, grinding wheel rotation accuracy and geometric shape accuracy are seriously restricted by the manufacturing accuracy of the grinding wheel base itself

Method used

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  • A special metal-ceramic CBN grinding wheel for end face ultra-fine grinding and preparation method thereof
  • A special metal-ceramic CBN grinding wheel for end face ultra-fine grinding and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] see figure 1 and figure 2 , as shown in the legend therein, a special cermet CBN grinding wheel for end surface superfinishing, including a substrate 1 and an abrasive layer 2, the abrasive layer 2 includes the following components in volume percentage:

[0031] Hollow glass microspheres 24%;

[0032] CuSn 15 Alloy powder 12%;

[0033] Vitrified bond 30%;

[0034] CBN abrasive 20%;

[0035] al 2 o 3 Abrasive 10%;

[0036] Polyvinyl alcohol 4%.

[0037] Substrate 1 is a steel base, the particle size of the above-mentioned hollow glass microspheres is 40-50 μm, the particle size of the above-mentioned CBN abrasive is w20, and the above-mentioned Al 2 o 3 The abrasive particle size is W40, the above-mentioned polyvinyl alcohol is 17-88 type, and the above-mentioned ceramic bond includes SiC, Al 2 o 3 , B 2 o 3 and additives, the above additives are Na 2 O, K 2 O. Li 2 O, ZnO.

[0038] The preparation steps of above-mentioned emery wheel are as follows: ...

Embodiment 2

[0047] All the other are identical with described embodiment one, and difference is that above-mentioned abrasive layer comprises the component of following volume percentage:

[0048] Hollow glass microspheres 20%;

[0049] CuSn 15 Alloy powder 11%;

[0050] Vitrified bond 30%;

[0051] CBN abrasive 25%;

[0052] al 2 o 3 Abrasive 10%;

[0053] Polyvinyl alcohol 4%.

[0054] The particle size of the above-mentioned hollow glass microspheres is 50-60 μm.

[0055] The surface finish of the workpiece processed by the grinding wheel prepared by the formula in this example is Ra0.09.

Embodiment 3

[0057] All the other are identical with described embodiment one, and difference is that above-mentioned abrasive layer comprises the component of following volume percentage:

[0058] Hollow glass microspheres 20%;

[0059] CuSn 15 Alloy powder 15%;

[0060]Vitrified bond 28%;

[0061] CBN abrasive 20%;

[0062] Al 2 o 3 Abrasive 12%;

[0063] Polyvinyl alcohol 5%.

[0064] The particle size of the above-mentioned hollow glass microspheres is 30-40 μm.

[0065] The surface finish of the workpiece processed by the grinding wheel prepared by the formula in this example is Ra0.06.

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Abstract

The invention discloses an end face super grinding special metal ceramic CBN (Cubic Boron Nitride) grinding wheel and a preparation method thereof. The grinding wheel comprises a body and a grinding material layer, wherein the grinding material layer contains 10-30% percent by volume of hollow glass beads. Through the grinding wheel, a pore is formed through a method of adding thin-wall hollow glass beads, so that a pore structure supported by the material is generated in the grinding wheel; a porosity in the grinding wheel can be controlled accurately; meanwhile, ball walls of the hollow glass beads are thin, so that the ball walls are easily broken in a grinding process to generate a plurality of micro air holes; and the micro air holes are play roles of receiving scraps and discharging scraps well, so that problems that the scraps are adhesive and workpieces are burned in the process of grinding precisely are greatly reduced.

Description

technical field [0001] The invention relates to a special cermet CBN grinding wheel for end surface superfine grinding, in particular to a preparation method of a special cermet CBN grinding wheel for end surface superfine grinding. Background technique [0002] With the needs of industrial development and the continuous breakthrough and innovation of material science, various new materials with high strength, high hardness, corrosion resistance and high temperature resistance have emerged as the times require. These materials are relatively difficult to process, especially in the process of precision grinding. The grinding wheel is easy to stick chips, and even cause burns to the workpiece. Currently, bonded abrasive wheels and electroplated grinding wheels are used more. The bonded abrasive wheels manufactured by traditional technology, especially the grinding wheels for precision and ultra-precision grinding, are very easy to block the working surface. It is easy to cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/14B24D18/00
Inventor 陈卫东韩云涂俊群王凯平
Owner SUZHOU SAILI PRECISION TOOLS