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Wear-resistant material for brake block of heavy duty automobile

A technology of wear-resistant materials and brake pads, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of non-wear resistance, poor friction stability of brake pads, adhesion, etc., to reduce high-temperature thermal decay and interface bonding Good effect of preventing high-speed recession

Inactive Publication Date: 2015-07-22
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, asbestos brake pads are mostly used as brake pad friction materials for vehicles. Every time a brake is applied, the brake pads will emit millions of asbestos fibers into the air, and the needle-shaped limit is easy Enter the lungs and stay there, causing irritation, which can eventually lead to the occurrence of lung cancer
But in addition to the health hazards, there is another important problem with asbestos brake pads
Because asbestos is heat-insulating, its thermal conductivity is particularly poor. After repeated use of the brakes, the heat will accumulate in the brake pads. After the brake pads become hot, their braking performance will change, and the same friction and braking force will be produced. More brakes will be required, and if the brake pads reach a certain level of heat, the brakes will fail
In addition, asbestos in asbestos brake pads is difficult to fully bond with other components in the brake pads, and it is easy to peel off, and it is not wear-resistant and has a short service life.
Therefore, resin-based materials have begun to replace asbestos as another commonly used wear-resistant material for brake pads. However, resin-based friction materials are prone to severe thermal decomposition when the operating temperature is high, causing a serious decline in friction and wear performance, thereby reducing the service life.
The existing brake pads still have a mismatch with the dual, resulting in resonance or poor friction stability between the disc and the brake pad, and the brake pad and the brake dual vary with the braking specific pressure, temperature, and speed, and the materials of the two sides adhere to each other noise problems

Method used

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  • Wear-resistant material for brake block of heavy duty automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The wear-resistant material raw material includes the following components by weight: 18 phenol A type novolac epoxy resin, 7 parts of diaminodiphenyl sulfone, 6 parts of ore powder, 4 parts of lubricant, 5 parts of crosslinking agent, 6 parts of chlorine Butadiene rubber powder, 3 parts of aluminum oxide, 5 parts of cotton fiber, 3 parts of carbon fiber, 5 parts of aramid fiber, 2 parts of sisal fiber, 3 parts of antimony trioxide, 6 parts of graphite, and 3 parts of calcium lignosulfonate.

[0024] In this embodiment, the ore powder is potassium feldspar. In this embodiment, the medium potassium feldspar is replaced by one of phosphate rock, medical stone, zeolite and attapulgite in equal parts by weight, or by The same weight part is replaced by a mixture of potassium feldspar, phosphate rock, medical stone, zeolite and attapulgite, and the properties of the obtained product have no difference in rank or order.

[0025] In this embodiment, the lubricant is tetraboron...

Embodiment 2

[0028] The heavy-duty vehicle brake pad wear-resistant material of this embodiment, the wear-resistant material raw material comprises the following components by weight: 15 parts of bisphenol A novolac epoxy resin, 5 parts of diaminodiphenyl sulfone, 3 parts of ore powder , 2 parts of lubricant, 3 parts of crosslinking agent, 4 parts of neoprene powder, 1 part of aluminum oxide, 3 parts of cotton fiber, 2 parts of carbon fiber, 3 parts of aramid fiber, 1 part of sisal fiber, 1 part of three Antimony oxide, 3 parts graphite, 1 part calcium lignosulfonate.

[0029] In this embodiment, the ore powder is phosphate rock, and in this embodiment, the medium phosphate rock is replaced by one of potassium feldspar, medical stone, zeolite and attapulgite, or by The same weight part is replaced by a mixture of phosphate rock, potassium feldspar, medical stone, zeolite and attapulgite, and the properties of the obtained product have no ranking or difference.

[0030] In this embodiment,...

Embodiment 3

[0033]The heavy-duty vehicle brake pad wear-resistant material of this embodiment, the wear-resistant material raw material comprises the following components by weight: 20 parts of bisphenol A novolac epoxy resin, 10 parts of diaminodiphenyl sulfone, 8 parts of ore powder , 6 parts of lubricant, 8 parts of crosslinking agent, 8 parts of neoprene powder, 6 parts of aluminum oxide, 7 parts of cotton fiber, 4 parts of carbon fiber, 7 parts of aramid fiber, 3 parts of sisal fiber, 6 parts of three Antimony oxide, 9 parts of graphite, 5 parts of calcium lignosulfonate.

[0034] In this embodiment, the ore powder is medical stone. In this embodiment, the medical stone is replaced by one of phosphate rock, potassium feldspar, zeolite and attapulgite in equal parts by weight, or by The same parts by weight are replaced by a mixture of medical stone, phosphate rock, potassium feldspar, zeolite and attapulgite, and the properties of the obtained product have no ranking or difference. ...

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Abstract

The invention discloses a wear-resistant material for a brake block of a heavy duty automobile. The wear-resistant material comprises raw materials as follows: bisphenol A novolac epoxy resin, diaminodiphenyl sulfone, mineral powder, a lubricant, a cross-linking agent, chloroprene rubber powder, aluminum oxide, cotton fiber, carbon fiber, aramid fiber, sisal fiber, antimonous oxide, graphite and calcium lignosulfonate. The components are compatible, so that the overall performance of the wear-resistant material is effectively guaranteed, the components can make up for defects in performance mutually and can have high performance due to mutual restriction functions, problems of existing brake blocks are solved, high-speed decline and high-temperature decline can be well prevented, and the wear-resistant material has advantages of better stability and long service life.

Description

technical field [0001] The invention relates to the field of automobile materials, in particular to a wear-resistant material for heavy-duty vehicle brake pads. Background technique [0002] Brake pads are also called brake pads or brake pads. In the braking system of a car, brake pads are the most critical safety parts and play a decisive role in the braking effect. Brake pads are generally composed of steel plates, bonded heat insulation layers and friction blocks. The friction block is composed of friction material and adhesive. When braking, the friction block is squeezed on the brake disc or brake drum to generate friction with it, so as to achieve the purpose of decelerating and braking the vehicle. It can be seen that the friction block determines the performance of the brake pad under high-speed and high-temperature braking conditions, and the friction material is an important part of the brake pad in the manufacturing process and use process. In the prior art, asb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L11/00C08L1/02C08L77/10C08K13/04C08K7/06C08K3/22C08K3/04C08K3/34C08K3/38C09K3/14
Inventor 邓涛韩海硕
Owner CHONGQING JIAOTONG UNIVERSITY
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