CN218325922U - Powder metallurgy friction block - Google Patents
Powder metallurgy friction block Download PDFInfo
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- CN218325922U CN218325922U CN202222859278.7U CN202222859278U CN218325922U CN 218325922 U CN218325922 U CN 218325922U CN 202222859278 U CN202222859278 U CN 202222859278U CN 218325922 U CN218325922 U CN 218325922U
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- copper
- powder metallurgy
- plated steel
- steel backing
- metallurgy friction
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Abstract
The utility model relates to a powder metallurgy clutch blocks, including copper-plated steel backing and copper base powder metallurgy clutch blocks, copper-plated steel backing and copper base powder metallurgy clutch blocks fixed connection, be provided with the brazing filler metal between copper-plated steel backing and the copper base powder metallurgy clutch blocks, copper base powder metallurgy clutch blocks is equipped with circular through-hole, it is protruding that one side fixedly connected with that copper-plated steel backing is close to copper base powder metallurgy clutch blocks, it inlays inside the clutch blocks through-hole to be protruding. This powder metallurgy clutch block through having increased recess and protruding design on the steel backing, adopts the copper brazing technique further to strengthen the bonding strength between the two simultaneously, improves the resistance to shear, the braking reliability of brake lining, makes it satisfy high-speed train's braking demand better, has very big advantage to improving braking system reliability and driving safety.
Description
Technical Field
The utility model relates to a high-speed railway brake friction block technical field specifically is a powder metallurgy friction block.
Background
The high-speed rail braking powder metallurgy friction material is a composite material prepared by using a powder metallurgy technology and taking metal and alloy thereof as a base body, adding a friction component, a strengthening component and a lubricating component, and is a key component of a friction clutch and a brake, and the high-speed rail braking powder metallurgy friction material is the material with the widest application range and the largest quantity in a modern friction material family.
The existing high-speed rail brake friction block mainly comprises a copper-based powder metallurgy composite material, after copper plating treatment is carried out on a steel back, the friction block and the steel back are directly sintered together and can be tightly connected, a friction body is directly attached to a brake disc during train braking, and the train is embraced by friction force, so that great shear stress exists between the friction body and the steel back, the load borne by a brake pad is larger and larger along with continuous increase of the speed of a high-speed train, the joint of the friction block and the steel back is easy to form shear force during high-speed rail braking, damage is caused, even separation is caused, and great potential safety hazards are caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a powder metallurgy clutch blocks possesses the shear resistance, the braking reliability that improve the brake lining, makes its advantages such as braking demand that satisfies high-speed train better, has solved the problem that traditional clutch blocks and steel backing break away from easily.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a powder metallurgy clutch blocks, is including copper-plated steel backing and copper base powder metallurgy friction body, copper-plated steel backing and copper base powder metallurgy friction body fixed connection, be provided with the brazing filler metal between copper-plated steel backing and the copper base powder metallurgy friction body, copper base powder metallurgy friction body is equipped with the through-hole, one side fixedly connected with that copper-plated steel backing is close to copper base powder metallurgy friction body is protruding, protruding the inlaying is inside the clutch blocks through-hole.
Furthermore, one side of the copper-plated steel back, which is close to the copper-based powder metallurgy friction body, is provided with a groove, and the brazing material is paved on the inner surface of the steel back.
Furthermore, a middle core column is fixedly connected to one side, away from the copper-based powder metallurgy friction body, of the copper-plated steel back, and the middle core column is located on one side, away from the protrusion.
Furthermore, circular through-holes are formed in the copper-plated steel backing, the number of the circular through-holes is four, and the circular through-holes have two sizes.
Further, the copper-plated steel back is provided with a key groove-shaped through hole, and the key groove-shaped through hole is arranged above the protrusion.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
according to the powder metallurgy friction block, the groove and the protrusion are additionally arranged on the steel backing, and meanwhile, the copper brazing technology is adopted to further enhance the bonding strength between the steel backing and the steel backing, so that the shearing resistance and the braking reliability of the brake pad are improved, and the braking requirement of a high-speed train is better met.
Drawings
FIG. 1 is a schematic view of the combination of the friction block and the steel backing of the present invention;
fig. 2 is a cross-sectional view of the present invention in fig. 1;
FIG. 3 is a left side view of the steel backing structure of the present invention;
fig. 4 is a front view of the steel backing structure of the present invention.
In the figure: 1 copper-plated steel back, 11 circular through holes, 12 protrusions, 13 grooves, 14 key groove-shaped through holes, 15 middle core columns, 2 brazing materials and 3 copper-based powder metallurgy friction bodies.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, in the embodiment, the powder metallurgy friction block includes a copper-plated steel backing 1 and a copper-based powder metallurgy friction body 3, the copper-plated steel backing 1 is fixedly connected with the copper-based powder metallurgy friction body 3, a brazing material 2 is disposed between the copper-plated steel backing 1 and the copper-based powder metallurgy friction body 3, a through hole is formed in one side of the copper-based powder metallurgy friction body 3 close to the copper-plated steel backing 1, a protrusion 12 is fixedly connected to one side of the copper-plated steel backing 1 close to the copper-based powder metallurgy friction body 3, the protrusion 12 is embedded in the through hole of the friction block, a middle core column 15 is fixedly connected to one side of the copper-plated steel backing 1 away from the copper-based powder metallurgy friction body 3, and the middle core column 15 is located at one side away from the protrusion 12.
The copper-based powder metallurgy friction body 3 is in contact with the copper-plated steel back 1, the copper-based powder metallurgy friction body 3 and the copper-plated steel back 1 are connected together through the brazing material 2 filled between the copper-based powder metallurgy friction body 3 and the copper-plated steel back 1, the left side of the copper-based powder metallurgy friction body 3 is a friction surface, the right side of the copper-based powder metallurgy friction body 3 is a contact surface connected with the copper-plated steel back 1, the right left side of the central core column 15 is provided with a protrusion 12 matched with the size of a friction block through hole, the protrusion 12 can be embedded into the friction block through hole during pressure sintering, the contact area of the copper-based powder metallurgy friction body 3 and the copper-plated steel back 1 is increased, and therefore the effect of enhancing the bonding strength of the copper-based powder metallurgy friction body and the copper-plated steel back 1 is achieved.
It should be noted that a layer of brazing material 2 is arranged on the contact surface of the copper-plated steel back 1 and the copper-based powder metallurgy friction body 3, the main component of the brazing material 2 is metal mixed powder, the content of brass in the metal mixed powder is 60% -90%, the brazing material 2 is flatly laid on the copper-plated steel back 1, a layer of brazing material 2 is laid on the joint surface of the copper-plated steel back 1 and the copper-based powder metallurgy friction body 3, and the brazing material 2 is melted and infiltrates the surfaces of the copper-based powder metallurgy friction body 3 and the copper-plated steel back 1 at the temperature of 850-1100 ℃ during pressure sintering. The liquid solder is spread by flowing under the action of capillary, and forms an alloy layer with the copper-based powder metallurgy friction body 3 and the copper-plated steel backing 1 in the processes of mutual dissolution, mutual permeation, recrystallization and the like, so that the bonding strength between the friction block and the steel backing can be improved, the pores of the friction block can be reduced, and the density of the friction block is further improved.
In this embodiment, one side of the copper-plated steel backing 1 close to the copper-based powder metallurgy friction body 3 is provided with a groove 13, the groove 13 is annular, the groove 13 is communicated with the groove 13, so that the brazing material 2 can flow better when molten, and the copper-plated steel backing 1 and the copper-based powder metallurgy friction body 3 can be welded more firmly.
In this embodiment, the copper-plated steel backing 1 is provided with four circular through holes 11, the copper-plated steel backing 1 is provided with a keyway-shaped through hole 14, and the keyway-shaped through hole 14 is located above the protrusion 12.
The working principle of the embodiment is as follows:
the surface of a copper-plated steel backing 1 is wiped clean, stains are removed, the copper-plated steel backing 1 is placed into a pressure sintering die after natural drying, a layer of brazing material 2 is uniformly paved on the surface of the copper-plated steel backing 1, the brazing material 2 is copper alloy brazing material, then a copper-based powder metallurgy friction body 3 is placed on the brazing material 2, the copper-plated steel backing 1 and the copper-based powder metallurgy friction body 3 are combined through pressure sintering, the pressure sintering temperature is 850-1100 ℃, and the pressure is 2-8MPa, so that the copper-plated steel backing 1 and the copper-based powder metallurgy friction body 3 are welded more firmly, and the copper-plated steel backing 1 and the copper-based powder metallurgy friction body 3 are not easy to separate when being subjected to larger shearing force.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a powder metallurgy clutch block, includes copper facing steel backing (1) and copper base powder metallurgy clutch block (3), its characterized in that: the copper-plated steel back (1) and the copper-based powder metallurgy friction body (3) are fixedly connected, a brazing material (2) is arranged between the copper-plated steel back (1) and the copper-based powder metallurgy friction body (3), the copper-based powder metallurgy friction body (3) is provided with a circular through hole, one side, close to the copper-based powder metallurgy friction body (3), of the copper-plated steel back (1) is fixedly connected with a protrusion (12), and the protrusion (12) is embedded inside the through hole of the friction block.
2. A powder metallurgy friction block according to claim 1, wherein: one side of the copper-plated steel back (1), which is close to the copper-based powder metallurgy friction body (3), is provided with a groove (13), and the brazing material (2) is paved on the inner surface of the steel back (1).
3. A powder metallurgy friction block according to claim 1, wherein: the side, far away from the copper-based powder metallurgy friction body (3), of the copper-plated steel back (1) is fixedly connected with a middle core column (15), and the middle core column (15) is arranged on the side, far away from the protrusion (12).
4. A powder metallurgy friction block according to claim 1, wherein: copper facing steel backing (1) is equipped with circular through-hole (11), circular through-hole (11) have four, four circular through-hole (11) total two kinds of sizes.
5. A powder metallurgy friction block according to claim 1, wherein: the copper-plated steel back (1) is provided with a key groove-shaped through hole (14), and the key groove-shaped through hole (14) is arranged above the protrusion (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222859278.7U CN218325922U (en) | 2022-10-28 | 2022-10-28 | Powder metallurgy friction block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222859278.7U CN218325922U (en) | 2022-10-28 | 2022-10-28 | Powder metallurgy friction block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218325922U true CN218325922U (en) | 2023-01-17 |
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ID=84826473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222859278.7U Active CN218325922U (en) | 2022-10-28 | 2022-10-28 | Powder metallurgy friction block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218325922U (en) |
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2022
- 2022-10-28 CN CN202222859278.7U patent/CN218325922U/en active Active
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