Nonmetal ceramic matrix drum brake pad for bus and preparation method thereof

A non-metallic and brake pad technology, applied in the field of non-metal ceramic based drum brake pads and its preparation, can solve the problems of affecting the stability of braking force, reducing the friction coefficient, frequent braking, etc., and achieves simple and feasible preparation method, emergency braking Sensitive movement and good economical effect

Inactive Publication Date: 2010-09-22
HUNAN BOYUN AUTOMOBILE BRAKE MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The frequent braking of urban buses will cause the brake pads to heat up (the temperature is as high as 350°C or more), which will lead to a decrease in the friction coefficient and thermal fading, which will affect the stability of the braking force
[0005] 2. The emergency braking sensitivity is not high
[0007] 3. Loud braking noise

Method used

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  • Nonmetal ceramic matrix drum brake pad for bus and preparation method thereof
  • Nonmetal ceramic matrix drum brake pad for bus and preparation method thereof
  • Nonmetal ceramic matrix drum brake pad for bus and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Tin Sulfide 30, Aramid Fiber 2,

[0030] mineral fiber 28, carbon fiber 3,

[0031] Fiberglass 3, Brass Fiber 5,

[0032] Chromite 4, Artificial Graphite 4,

[0033] flake graphite 8, friction powder 4,

[0034] rubber 2, compound filler 5,

[0035] Calcium carbonate powder 2.

[0036] In this formula system, the ceramic binder is mainly an inorganic high-temperature binder such as metal sulfide, which can significantly improve the temperature resistance of the material, reduce the wear of the material at high temperature, and make the material form a network porous structure. Increased braking smoothness and reduced braking noise. In order to continue to use the molding process and production equipment of resin-based automobile brake pads, a small amount of resin and rubber is added to reduce equipment investment and production costs.

[0037] Composite fiber has excellent dispersibility and adsorption, especially, it has excellent affinity with resin, friction m...

Embodiment 2

[0057] Tin sulfide 20, Aramid fiber 3,

[0058] mineral fiber 27, carbon fiber 2,

[0059] Fiberglass 2, Brass Fiber 5,

[0060] Chromite 4, Artificial Graphite 7,

[0061] flake graphite 14, friction powder 8,

[0062] rubber 4, compound filler 10,

[0063] Calcium carbonate powder 4.

[0064] The preparation method of embodiment 2 is the same as that of embodiment 1, and table 3 is the constant speed test result of the brake pad prepared by embodiment 2:

[0065] The constant speed experiment result of table 3 embodiment 2 brake pads

[0066]

Embodiment 3

[0068] Tin Sulfide 20, Aramid Fiber 1,

[0069] mineral fiber 29, carbon fiber 3,

[0070] Fiberglass 3, Brass Fiber 5,

[0071] Chromite 2, Artificial Graphite 5,

[0072] flake graphite 10, friction powder 10,

[0073] rubber 5, compound filler 5,

[0074] Calcium carbonate powder 2.

[0075] The preparation method of embodiment 3 is the same as that of embodiment 1, and table 4 is the constant speed test result of the brake pad prepared by embodiment 3:

[0076] The constant speed test result of table 4 embodiment 3 brake pads

[0077]

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PUM

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Abstract

The invention discloses a nonmetal ceramic matrix drum brake pad for a bus and a preparation method thereof. The production flow is as follows: sequentially weighting 20 to 40 nonmetal composite fiber, 10 to 20 friction performance regulator, 20 to 30 vitrified bond, 0 to 5 heat conductivity fiber, 5 to 10 elastic flexibilizer and 10 to 20 filling and placing in a high speed blend mixer to be mixed evenly; then pressing, thermocuring processing, final machining and vitrified processing; and completing checking and package according to the dry-press process technology of traditional resin matrix friction material. The nonmetal ceramic matrix drum brake pad manufactured according to the technology has the advantages of agile emergency brake, comfortable and steady performance, no noise, little dust accumulation, good economical performance, simple production technology and environmental protection and is particularly applicable to civil buses.

Description

technical field [0001] The invention relates to the technical field of friction materials for automobiles, in particular to a drum brake pad, in particular to a non-metallic ceramic based drum brake pad used for urban bus braking and a preparation method thereof. Background technique [0002] The frequent braking of urban buses will cause the temperature of the brake pads to be too high, which will eventually cause the brake pads to decrease due to braking force and expand due to heat, and even cause the brake system to lock up. In addition, compared with other types of vehicles (such as cars, trucks, etc.), urban buses have more special requirements, because they mainly operate within the city, and generally do not allow noise and more dust. At present, the brake pads used on buses in our country mainly have the following main problems: [0003] 1. Large thermal recession [0004] The frequent braking of urban buses will cause the brake pads to heat up (the temperature is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02F16D65/02C04B28/36
Inventor 刘伯威贺云果蒋辉珍
Owner HUNAN BOYUN AUTOMOBILE BRAKE MATERIALS
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