Brake shoe and preparation method thereof

A brake shoe and mass fraction technology, applied in the field of wear-resistant materials, can solve the problems of difficulty in meeting the use requirements of brake shoes, weakened friction, poor wear resistance, etc., and achieves difficult deformation, small friction coefficient changes, and good wear resistance. Effect

Pending Publication Date: 2022-07-01
杭州嘉拓新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two kinds of existing brake shoes: semi-metal material and NAO material. Among them, the friction force of the semi-metal brake shoe will be weakened under high temperature for a long time, and the service life in the car is relatively low, while the brake shoe made of NAO material has better wear resistance. Poor, the friction coefficient is low, it is difficult to meet the use requirements of brake shoes

Method used

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  • Brake shoe and preparation method thereof
  • Brake shoe and preparation method thereof
  • Brake shoe and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 2

[0060] Embodiment 24, the difference with embodiment 2 is that the preparation method is as follows:

[0061] 1. Mix the above materials and dehydrate under vacuum at 60°C for 10min;

[0062] S2. The dehydrated material is hot-pressed at 100°C, and the pressure-holding time is 250s;

[0063] S3. The product after hot pressing is heat treated, and the heat treatment temperature is increased from 100°C to 185°C within 12h;

[0064] S4. The heat-treated product is subjected to groove grinding, electrostatic spraying, assembling accessories, coding, plastic sealing, and packaging to obtain brake shoes.

[0065] In the above embodiments, the phenolic resins are all octylphenolic vulcanized resins.

Embodiment 25

[0066] Example 25 is different from Example 22 in that the octylphenolic vulcanized resin is replaced by a brominated p-tert-octylphenolic vulcanized resin.

[0067] For the above examples and comparative examples, with reference to "GB 5763-2008 automotive brake linings", the normal temperature friction coefficient, high temperature friction coefficient, secondary decay (93~288 ℃) friction coefficient minimum value, secondary friction coefficient of the above-mentioned brake shoe were measured The minimum value of the coefficient of friction (149-93°C) and the wear amount at 300°C were recovered (149-93°C).

[0068] The experimental results of Examples 1 to 25 and Comparative Examples 1 to 3 are shown in Table 2.

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Abstract

The invention relates to the technical field of wear-resistant materials, in particular to a brake shoe and a preparation method thereof.The brake shoe is prepared from a binder, a reinforcing material, filler and a friction modifier, the binder at least comprises phenolic resin, and the total mass part of the binder is 40-60; the reinforcing material comprises the following components in parts by mass: 50-70 parts of mineral fiber; 5 to 10 parts of glass fiber; 10-20 parts of calcium sulfate whisker; 5-10 parts of aluminum silicate fiber; 10 to 15 parts of steel wool; the filler at least comprises barium sulfate and vermiculite, and the mass part of the filler is 70-90; the friction modifier comprises the following components in parts by mass: 35-45 parts of coke; and 10-20 parts of crystalline flake graphite. The brake shoe can have the heat-resistant and wear-resistant effects at the same time.

Description

technical field [0001] The present application relates to the technical field of wear-resistant materials, in particular to a brake shoe and a preparation method thereof. Background technique [0002] The brake shoe is an important component in the brake device, generally in the shape of a crescent. In the process of stepping on the brakes, the brake shoes are pushed outward and rub against the inner wall of the brake drum, thereby braking the vehicle. The existing brake shoes are made of semi-metal and NAO. Among them, the brake shoes of semi-metal will reduce the friction force under long-term high temperature and have a lower service life in automobiles, while the brake shoes of NAO have better wear resistance. Poor, the friction coefficient is low, and it is difficult to meet the use requirements of brake shoes. SUMMARY OF THE INVENTION [0003] In view of the above problems, the present application provides a brake shoe and a preparation method thereof, which have g...

Claims

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Application Information

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IPC IPC(8): C09K3/14F16D65/08
CPCC09K3/149F16D65/08
Inventor 杨倩
Owner 杭州嘉拓新材料科技有限公司
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