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Material of automobile brake pad and preparation method of material

A technology for brake pads and automobiles, applied in chemical instruments and methods, friction linings, mechanical equipment, etc., can solve the problems of increased thermal conductivity, low wear rate, high friction coefficient of brake pads, and enhanced strength and anti-friction performance. , The effect of stable material bonding performance and stable friction coefficient

Active Publication Date: 2018-08-17
ANHUI SANLIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase in thermal conductivity will inevitably weaken the shear strength of the brake pads under high temperature conditions, causing braking hazards
In addition, too high thermal conductivity will quickly transfer a large amount of heat energy generated by the vehicle during frequent braking to the brake valve, causing air bubbles and air resistance in the hydraulic brake pipe, which seriously affects the safety of the vehicle during braking.
[0006] (3) Metal-less brake pads: The friction material of metal-less brake pads is composed of a small amount of steel fiber plus mineral fiber as a matrix, adding various functional fillers, and adding phenolic resin as a binder. The disadvantages are: heavy wear, short service life of the product, prone to braking noise, and the wheels of the car are prone to shake when braking at high speed, which seriously affects the comfort of vehicle braking
[0007] Many existing brake pads are made of ceramic fiber materials. The prepared brake pads have a high friction coefficient and low wear rate at high temperatures. However, for high-speed vehicles at high temperatures, pure ceramic brake pads cannot meet the braking performance of the brake pads. and wear rate requirements, especially for high-end cars, it is cumbersome and costly to replace the brake pads

Method used

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  • Material of automobile brake pad and preparation method of material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of preparation method of the material of automobile brake pad is as follows:

[0042] (1) 1.4kg of filled porous nano-ceramics, 0.4kg of glass fiber, 0.2kg of hollow glass microspheres, 1.2kg of carbonized straw and 1kg of steel fiber were pulverized and mixed uniformly by a ball mill before use;

[0043] (2) 0.6kg copper powder, 0.2kg reduced iron powder, 0.3kg precipitated barium sulfate, 1kg flake graphite, 0.2kg molybdenum disulfide and 0.3kg mica are added in the ball mill of step 1 and fully ground and mixed to obtain a mixture;

[0044] (3) Send the mixture and the brake pad back plate evenly coated with 0.8Kg composite resin binder into the molding process for processing, and the blank obtained after processing is subjected to heat treatment and grinding processes to obtain the automobile brake pad.

[0045] The preparation process of the composite resin binder is as follows:

[0046](1) Add 9.411kg of phenol into the reaction vessel, heat up to 50-60°C,...

Embodiment 2

[0057] A kind of preparation method of the material of automobile brake pad is as follows:

[0058] (1) 1.9kg of filled porous nano-ceramics, 0.7kg of glass fiber, 0.5kg of hollow glass microspheres, 1.6kg of carbonized straw and 1.4kg of steel fiber were pulverized and mixed uniformly by a ball mill before use;

[0059] (2) 1.1kg copper powder, 0.5kg reduced iron powder, 0.8kg precipitated barium sulfate, 1.8kg flake graphite, 0.4kg molybdenum disulfide and 0.5kg mica are added in the ball mill of step 1 and fully ground and mix, obtain compound (3 ) send the brake pad back plate of mixed material and evenly coated 1.3Kg composite resin binder into the molding process for processing, and the blank obtained after processing obtains the automobile brake pad through heat treatment and grinding process.

[0060] The preparation process of the composite resin binder is as follows:

[0061] (1) Add 9.411kg of phenol into the reaction vessel, heat up to 50-60°C, add 0.3kg of sodium...

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Abstract

The invention discloses a material of an automobile brake pad. The material is prepared from, by weight, 8-13 parts of compound resin adhesive, 14-19 parts of filling type porous nano ceramic, 4-7 parts of glass fiber, 2-5 parts of hollow glass beads, 12-16 parts of carbonized straws, 10-14 parts of steel fiber, 6-11 parts of copper powder, 2-5 parts of reduced iron powder, 3-8 parts of precipitated barium sulfate, 10-18 parts of crystalline flake graphite, 2-4 parts of molybdenum disulfide and 3-5 parts of mica. The brake pad disclosed by the invention contains the filling type porous nano ceramic which replaces existing ceramic fibers. As the filling type porous nano ceramic is prepared by filling ducts of a porous nano ceramic material with a compound silicon dioxide material and nano titanium dioxide is added into a porous nano ceramic material production process at the same time, the prepared material is relatively high in mechanical strength, wear resistance and heat conducting performance compared with those of the ceramic fibers, so that the friction coefficient of the brake pad at the high temperature is stable and the wear rate is relatively low.

Description

technical field [0001] The invention belongs to the field of automobile production, and relates to a material for an automobile brake pad and a preparation method for the material. Background technique [0002] With the rapid development of the car industry, a large number of cars have entered the homes of ordinary people. The performance of cars, especially the braking performance, has become a common concern in the society, because car brake pads are key components in car brakes. Whether it is good or bad is directly related to the reliability, stability and safety of automobile operation. [0003] At present, there are mainly three types of brake pads used for car braking, and their disadvantages in application are: [0004] (1) Asbestos-based brake pads: The friction material of asbestos-based brake pads is mainly asbestos fibers. Asbestos fibers inhaled by the human body will cause health problems, so their use is restricted. In addition, asbestos-based brake pads hav...

Claims

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Application Information

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IPC IPC(8): F16D69/02C09K3/14
Inventor 王建国张芹吴芳芳吴小四
Owner ANHUI SANLIAN UNIV