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Friction material for preparing NAO brake pad

A friction material and brake pad technology, applied in the field of automobile brake pads, can solve the problems of dirty appearance of the wheel hub, color pollution of the wheel hub, braking noise of the brake pad, etc., and achieve the effect of good visual effect, low wear rate and stable braking effect.

Active Publication Date: 2011-09-14
HANGZHOU UNITED FRICTION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powdered calcium carbonate particles are very small, and it is used as an inorganic filler in the friction material to fill the gap between the components in the friction material, so that the porosity of the finished friction material is reduced, and it is easy to cause brake noise during the use of the brake pad.
[0007] In addition, the friction material particles commonly used in the market are black: because the color of the automobile wheel is silver, the application of black particles and raw materials will produce black powder after braking, which will cause color pollution to the wheel, resulting in a dirty appearance of the wheel. poor visual effect

Method used

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  • Friction material for preparing NAO brake pad
  • Friction material for preparing NAO brake pad
  • Friction material for preparing NAO brake pad

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Ceramic fiber 5%, mineral fiber 15%, resin 10%, chalcocite powder 6%, graphite 10%, barium sulfate 18%, biological calcification particles 5%, coke 5%, wear reducer 10%, performance adjustment Agent 5%, filler 11%, total 100%.

[0023] The above-mentioned materials were made into brake pads according to the conventional pressing method, and tested according to category 4 on a constant speed testing machine according to the GB5763-2008 standard. The results are shown in Table 1.

[0024] Table 1:

[0025]

[0026] It can be seen from the data in Table 1 that the friction coefficient of the friction material obtained in Example 1 of the present invention changes very little. In the heating stage, the friction coefficient is 0.35-0.40, and the friction coefficient is 0.33-0.44 in the cooling stage. The wear rate is small and stable at 0.11-0.25*10 -7 / N.m, the maximum value appears at 200°C, only 0.45*10 -7 / N.m, fully meet the national standard. After extensive use...

Embodiment 2

[0028] Ceramic fiber 12%, mineral fiber 6%, resin 8%, chalcocite powder 10%, graphite 15%, barium sulfate 10%, biological calcification particles 10%, coke 4%, wear reducer 10%, performance adjustment Agent 5%, filler 10%, total 100%.

[0029] The above materials were made into brake pads according to the conventional pressing method, and tested according to category 4 on a constant speed testing machine according to the GB5763-2008 standard. The results are shown in Table 2.

[0030] Table 2:

[0031]

[0032] It can be seen from the data in Table 2 that the friction material obtained in Example 2 of the present invention has a friction coefficient of 0.36-0.40 in the heating stage, and a friction coefficient of 0.32-0.42 in the cooling stage, and the wear rate is small, which fully meets the national standard. After extensive use in Santana, Sonata and Jetta taxis, the braking is smooth, the braking noise is small, and the life of the friction material has reached more t...

Embodiment 3

[0034] Ceramic Fiber 8%, Mineral Fiber 7%, Resin 6%, Chalcocite Powder 8%, Graphite 12%, Barium Sulfate 10%, Biological Calcium Granules 15%, Coke 3%, Wear Reducing Agent 13%, Performance Adjustment Agent 8%, filler 10%, total 100%.

[0035] The above materials were made into brake pads according to the conventional pressing method, and tested according to category 4 on a constant speed testing machine according to the GB5763-2008 standard. The results are shown in Table 3.

[0036] table 3:

[0037]

[0038] It can be seen from the data in Table 3 that the friction material obtained in Example 3 of the present invention has a friction coefficient of 0.35-0.41 in the heating stage and a friction coefficient of 0.33-0.45 in the cooling stage, and the wear rate is small, which fully meets the national standard. After extensive use in Santana, Sonata and Jetta taxis, the braking is smooth, the braking noise is small, and the life of the friction material has reached more than...

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Abstract

The invention discloses a friction material for preparing NAO brake pads, which is prepared with the following materials by weight through a conventional brake pad compacting method: 5-15% of ceramic fibers, 5-15% of mineral fibers, 5-10% of resin, 5-10% of chalcocite powder, 10-20% of graphite, 10-20% of barium sulfate, 3-15% of biologically calcified particles, 3-10% of coke, 10-20% of antifriction agents, 5-10% of performance modifying agents, and 10-20% of fillers. The friction material of the invention contains natural biologically calcified particles as fillers, and is used to prepare brake pads together with other raw materials through a conventional brake pad compacting method. According to GB5763-2008, the brake pad is tested as the fourth class on a fixed speed test machine; the friction coefficient is stable; during a temperature increasing period, the friction coefficient is 0.35-0.40, and during a temperature decreasing period, the friction coefficient is 0.33-0.44; the wear rate is low, is stabilized within 0.11-0.25*10-7 / N.m with a maximum of only 0.45*10-7 / N.m which occurs at 200 DEG C; and the national standard is completely reached. By widely used in Santana, Sonata and Jetta taxis, the brake pad has smooth braking and low braking noise, and the life of the friction material is up to above 35000 kilometers.

Description

technical field [0001] The invention relates to automobile brake pads, in particular to a friction material used for preparing NAO brake pads. Background technique [0002] The most important safety system on a car is the braking system, and all braking components are safety components. Brake pads are one of the most important links in the entire braking system, which will directly affect the reliability of the entire braking system. [0003] Brake pads and brake discs rub against each other to form a frictional couple, generate braking torque, and convert the kinetic energy of the car into heat energy. When braking, the temperature of the brake pads and brake discs will rise by 300-400°C. Brakes Brake pads and discs are the most stressed components in a vehicle, subject to extreme heat, mechanical and chemical stress. In addition, brake pads are exposed to environmental influences such as moisture, salt, dust and stains over time, which can affect their performance and lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/02
Inventor 陈忠
Owner HANGZHOU UNITED FRICTION MATERIAL
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