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Metal base firing brake block with double-layer structure and manufacturing method thereof

A double-layer structure, metal-based technology, applied in the direction of brake parts, friction linings, mechanical equipment, etc., can solve the problem of increasing the complexity of the brake pad bottom plate mechanism, increasing the weight of the brake pad, and having little adjustment effect, etc. problem, to achieve the effects of small space occupation, short running-in time, and short local high-pressure time

Active Publication Date: 2011-11-16
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem brought by this method is that the complexity of the brake pad bottom plate mechanism is greatly increased, the manufacturing cost is significantly increased, and the weight of the brake pad is increased, which is unfavorable for reducing the weight of the vehicle
At the same time, this method of adding an adjustment mechanism on the bottom plate can only realize the adjustment of a single brake block, and when the difference in contact area appears between different brake blocks, the adjustment effect is not great. In fact, the contact area The largest difference is often manifested between non-adjacent brake pads

Method used

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  • Metal base firing brake block with double-layer structure and manufacturing method thereof
  • Metal base firing brake block with double-layer structure and manufacturing method thereof
  • Metal base firing brake block with double-layer structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 , The railway vehicle brake pad is composed of a base plate 1 and one or several brake blocks 2 fixed on the base plate 1 . The brake block 2 is composed of a surface layer 3 and a base layer 4 to form a double-layer structure, the thickness of the surface layer 3 is 1-5mm, and the thickness of the base layer 4 is 10-30mm. The surface layer 3 is made of low wear resistance material, and the base layer 4 is made of high wear resistance material. The bonding surface between the two layers is metallurgical bonding. The upper surface of the surface layer 3 is a friction surface, and the lower surface of the base layer 4 is connected with the bottom plate or the bottom plate attachment (not marked in the figure).

[0031] The composition of the double-layer materials is different, but the friction coefficients are all in the same fluctuation range.

[0032] The material of the brake block composed of the surface layer 3 and the base layer 4 is metal-based...

Embodiment 2

[0041] Prepare the composition of the surface layer 3, divide the surface layer 3 into two groups, the composition of the first group is: copper powder 55%, iron powder 21%, SiO 2 7%, graphite 17%. The composition of the second group is: copper powder 58%, aluminum powder 2%, iron powder 17%, Al 2 o 3 1%, SiO 2 7%, graphite 15%. Composition of base layer 4, copper powder 58%, aluminum powder 3%, iron powder 16%, tin powder 3%, Al 2 o 3 2%, SiO 2 10%, graphite 8%.

[0042] The prepared three groups of components are mixed separately to obtain mixed powders of each group.

[0043] First put the mixed powder of the base layer 4 into the mold, press it under a pressure of 100MPa for 5-10 seconds, withdraw the pressing punch from the mold, then put the second group of mixed powder of the surface layer 3 into the mold, and carry out the second The first pressing is followed by putting the first group of mixed powders of the surface layer 3 into the mold for the third pressin...

Embodiment 3

[0047] Prepare the composition of the surface layer 3, divide the surface layer 3 into three groups, the composition of the first group is: copper powder 55%, iron powder 20%, SiO 2 4%, mullite 3%, molybdenum disulfide 3%, graphite 15%. The composition of the second group is: copper powder 57%, tin powder 5%, iron powder 15%, Al 2 o 3 1%, SiO 2 4%, mullite 3%, molybdenum disulfide 1%, graphite 14%. The composition of the third group is: copper powder 60%, aluminum powder 5%, iron powder 15%, iron-chromium alloy 2%, mullite 2%, graphite 16%. The composition of base layer 4 is copper powder 65%, aluminum powder 3%, iron powder 10%, tin powder 3%, iron-chrome alloy 4%, mullite 2%, graphite 13%.

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Abstract

The invention relates to a metal base firing brake block with a double-layer structure and a manufacturing method thereof. The brake block is a double-layer structure, one layer is a surface layer which is made of low abrasion resistant material, and the other layer is a basement layer which is made of high abrasion resistant material; the top surface of the surface layer is a friction surface, the other surface is connected with a surface of the basement layer, and the other surface of the basement layer is connected with a bottom plate or a bottom plate accessory; and the components of the surface layer and the basement layer are different, but both are metal base firing friction materials which employs copper base or iron base metal as matrix and contains a friction constituent elementand a lubricating constituent element. When being applied to the manufacturing of brake pads, the metal base firing brake block can avoid the long-term existence of local high stress area in the friction braking process, thereby greatly decreasing hot-spot phenomenon, and achieving the purposes of improving the braking force and prolonging the life span of friction pairs. The brake block with thedual-layer structure is particularly applicable to the manufacturing of the brake pads and brake shoes for railway vehicles.

Description

Technical field: [0001] The invention belongs to the technical field of friction material manufacture, in particular to a metal-based sintered brake block manufacturing process, and is especially suitable for manufacturing railway vehicle brake pads and brake shoes. Background technique: [0002] Friction brake products are the key components of brakes and clutches, and are widely used in transportation tools such as automobiles, motorcycles, trains, and airplanes, as well as sports machinery such as oil drilling and wind power generation. In braking, the friction pair formed by the friction brake parts consumes the energy of the moving vehicle or equipment through mutual friction, so as to achieve the purpose of stopping the moving vehicle and equipment. With the improvement of the kinetic energy of moving vehicles and equipment, the use conditions of friction brake components are becoming more and more stringent. Especially in the field of high-speed train manufacturing, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/04F16D69/02B22F3/16B22F7/02
Inventor 高飞宋宝韫符蓉王延辉
Owner DALIAN JIAOTONG UNIVERSITY