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Polymer composite grinding wheel substrate and preparation method thereof

A technology of composite materials and polymers, which is applied in the composite material matrix of superabrasive grinding wheels and its preparation field, can solve the problems of large thermal deformation, uneven density, poor heat resistance of bakelite matrix, etc., and achieve high impact toughness and rigidity The effect of low requirements and not easy to break

Active Publication Date: 2016-05-04
ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used aluminum substrates are cast aluminum and aluminum rods. The cost of aluminum rods is relatively high. Due to the influence of the casting process, the cast aluminum substrates often have blisters, uneven density, poor balance of the grinding wheel, and aluminum substrates generally cannot meet the high-speed requirements. The application of the grinding wheel, the abrasive layer of the grinding wheel is easy to detach
The steel matrix has high strength and can meet high-speed grinding without deformation, but the steel matrix is ​​heavy and requires high rigidity of the machine tool spindle
Although the phenolic aluminum matrix is ​​light in weight, due to the limitation of the stability of the polymer resin material, the manufacturing cost of the phenolic aluminum matrix is ​​relatively high
The bakelite substrate has poor heat resistance and large thermal deformation, which deforms during grinding and heat, which affects the processing accuracy of the workpiece
[0004] In recent years, a fiber-reinforced matrix has also appeared in the matrix used in the field of grinding wheels. The Chinese patent with the publication number CN201210274354 discloses a fiber-reinforced matrix and a preparation method. Although the matrix can be well reinforced, it cannot be guaranteed that it can be applied. For high-speed grinding wheels and elastic polishing wheels

Method used

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  • Polymer composite grinding wheel substrate and preparation method thereof
  • Polymer composite grinding wheel substrate and preparation method thereof
  • Polymer composite grinding wheel substrate and preparation method thereof

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preparation example Construction

[0041] A preparation method of a polymer composite material grinding wheel matrix, comprising the following steps:

[0042] (1) Preparation of resin liquid reinforced fiber mesh cloth

[0043] Modified polyester fibers and polyimide fibers were made into 60-mesh mesh cloth, soaked in 70% acetic acid solution for 2 hours to set the shape, and then air-dried; the air-dried mesh cloth was soaked in Immerse in the mixture of alcohol-based phenolic resin solution and polyurethane resin solution for 5 minutes, then take out the impregnated grid cloth and place it in a glass tray, and dry and cure it in an oven at 100°C for 2 hours;

[0044] (2) Preparation of molding materials

[0045]According to the parts by volume of each component, bakelite powder 15-25, aluminum powder 20-30, phenolic resin 25-40, polyvinyl butyral 10-20, copper powder 8-15, zinc oxide powder 3-8, calcium oxide Powder 3-8, spherical graphite 8-15 Weigh the filling material, mix the filling material in a ball ...

Embodiment 1

[0049] A polymer composite material grinding wheel matrix, which is formed by pressing and solidifying resin liquid reinforced fiber mesh cloth and filling material, and the composition of each raw material in the filling material is shown in Table 1.

[0050]

[0051] A preparation method of a polymer composite material grinding wheel matrix, comprising the following steps:

[0052] (1) Preparation of resin liquid reinforced fiber mesh cloth

[0053] Modified polyester fibers and polyimide fibers were made into 60-mesh mesh cloth, soaked in 70% acetic acid solution for 2 hours to set the shape, and then air-dried; the air-dried mesh cloth was soaked in Immerse in the mixture of alcohol-based phenolic resin solution and polyurethane resin solution for 5 minutes, then take out the impregnated grid cloth and place it in a glass tray, and dry and cure it in an oven at 100°C for 2 hours;

[0054] (2) Preparation of molding materials

[0055] Weigh the filling materials of eac...

Embodiment 2

[0059] A polymer composite material grinding wheel matrix, which is formed by pressing and solidifying resin liquid reinforced fiber mesh cloth and filler, and the filler is composed of the following raw materials in parts by volume: bakelite powder 15, aluminum powder 30, phenolic resin 39, polyvinyl butyral 20, copper powder 15, zinc oxide powder 3, calcium oxide powder 3, spherical graphite 15.

[0060] A preparation method of a polymer composite material grinding wheel matrix, comprising the following steps:

[0061] (1) Preparation of resin liquid reinforced fiber mesh cloth

[0062] Modified polyester fibers and polyimide fibers were made into 60-mesh mesh cloth, soaked in 70% acetic acid solution for 2 hours to set the shape, and then air-dried; the air-dried mesh cloth was soaked in Immerse in the mixture of alcohol-based phenolic resin solution and polyurethane resin solution for 5 minutes, then take out the impregnated grid cloth and place it in a glass tray, and dr...

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Abstract

The invention discloses a polymer composite grinding wheel substrate. The polymer composite grinding wheel substrate is prepared by pressing liquid resin reinforced fiber gridding cloth and a filler to obtain a semi-finished substrate and conducting curing molding on the semi-finished substrate to obtain the finished substrate. The filler comprises the following ingredients in parts by volume: 35-55 parts of bakelite powder and aluminium powder, 35-60 parts of an adhesive, and 22-46 parts of a functional filler, wherein the adhesive is a mixture of modified thermosetting phenol resin powder and thermoplastic polyvinyl butyral with elasticity, and the volume ratio of the modified thermosetting phenol resin powder to thermoplastic polyvinyl butyral is (2-4) to 1; and the functional filler is a mixture of copper powder, calcium oxide powder, zinc oxide powder and spheroidal graphite, and the volume ratio of the copper powder to the calcium oxide powder to the zinc oxide powder to spheroidal graphite is (1-5) to 1 to 1 to (1-5). Through the addition of modified reinforced fibers, resin with toughness, and the filler, the polymer composite grinding wheel substrate has certain elasticity and high strength, is higher in impact toughness, can be matched with a fine-grained polishing grinding wheel, can be used for high-speed grinding, and is not prone to breakage, and besides, the safe grinding speed of the polymer composite grinding wheel substrate can be up to 70 m / s; and compared with an aluminum substrate and a steel substrate, the polymer composite grinding wheel substrate is low in density and light in mass, and can be applicable to a common resin grinding wheel, a common super-abrasive grinding wheel and a common elastic polishing grinding wheel.

Description

technical field [0001] The invention belongs to the field of superhard materials and products in mechanical processing, and in particular relates to a composite material matrix applied to superhard abrasive grinding wheels and a preparation method thereof. Background technique [0002] The role of the grinding wheel base is mainly used to support the abrasive layer of the grinding wheel, and according to the shape of the processing object, it is processed into a matching shape, installed on the main shaft of the grinding machine, and grinds various workpieces. Grinding wheel substrates have different materials and shapes. At present, the substrate materials used in superabrasive grinding wheels mainly include aluminum substrates, steel substrates, bakelite substrates, and phenolic aluminum substrates. [0003] The grinding wheel substrate supports the rotation of the abrasive layer of the grinding wheel to grind the workpiece. Mechanical factors such as the strength, elastic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/00B24D18/00C08L61/06C08L97/02C08L29/14C08K13/04
CPCB24D3/001B24D18/0009C08L61/06C08L2205/035C08L2205/16C08L97/02C08L29/14C08K13/04
Inventor 叶腾飞
Owner ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
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