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A powder metallurgy brake disc and its production process

A technology of powder metallurgy and brake discs, which is applied in the field of brake discs, can solve the problems affecting the normal deceleration process of vehicles, reduce the heat dissipation function of brake discs, and reduce the service life of brake discs, etc., achieve standardization of size, improve cooling effect, and reduce self-weight

Active Publication Date: 2022-04-22
LAIZHOU BAOYI MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ordinary brake discs adopt gray cast iron casting process. During the casting process, the temperature of molten iron, material distribution and other factors have a serious impact on the finished product rate of brake disc blanks. The proportion of blanks processed by CNC machining is as large as 1:1.4-1:1.5, resulting in energy In addition, the brake disc will generate a lot of heat during the braking process. When the disc-shaped part of the existing brake disc rotates, the heat dissipation mainly depends on the heat transfer between the two friction surfaces, which leads to the ventilation of the common brake disc. The heat dissipation function of the brake disc is poor, and the instantaneous heat affects the normal deceleration process of the vehicle, and some brake discs do not have the function of dust removal, which will also affect the braking of the vehicle and reduce the service life of the brake disc. , the hazards to the safe driving of the vehicle

Method used

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  • A powder metallurgy brake disc and its production process
  • A powder metallurgy brake disc and its production process
  • A powder metallurgy brake disc and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A powder metallurgy brake disc, comprising a brake disc body and a heat dissipation device 14, the brake disc body includes a first brake disc 1 and a second brake disc 2, the center of the first brake disc 1 is provided with a mounting surface 3, the mounting surface 3 is provided with a central hole 4, and the mounting surface 3 is uniformly provided with bolt holes 5 on the periphery of the central hole 4, and there are four bolt holes 5. The mounting surface 3 is connected to the first brake disc 1, and the mounting surface 3 and the There is a small space 6 between the first brake discs 1, a hollow 36 is provided at the center of the first brake disc 1, the outer side of the first brake disc 1 is the first braking surface 9, and the first braking surface 9 corresponds to the hollow 36 The position of the heat dissipation hole 33 is provided, and the heat dissipation hole 33 is uniformly arranged to dissipate the heat between the brake discs. The edge circumference o...

Embodiment 2

[0059] The raw material composition of brake disc body powder preparation is calculated by weight percentage: C: 2.8%; Si: 1%; Mn: 0.5%; S: 1.5%; P: 0.2%; Cu: 0.2%; Cr: 0.2%; V : 0.1%; N: 0.2%, Co: 4%; the rest is Fe.

[0060] The preparation of the brake disc comprises the following steps:

[0061] (1) Use a pulverizer to pulverize the raw materials of the brake disc to 80-100 mesh, configure the powder according to the above ratio, and use a ball mill to mix for 11 hours;

[0062] (2) Weighing the uniform raw material obtained in step (1) and adding it to a mould, using a 300t press to press-form the mixed powder to obtain a semi-finished brake disc;

[0063] (3) Heat the semi-finished brake disc in step (2) to 1100°C in an intermediate frequency induction furnace for sintering. The sintering time is 60 minutes, and the furnace temperature remains at 1100°C;

[0064] (4) Naturally cool the melted brake disc semi-finished product out of the furnace to normal temperature to ...

Embodiment 3

[0071] The raw material composition of brake disc body powder preparation is calculated by weight percentage: C: 3.6%; Si: 2%; Mn: 1.5%; S: 2.5%; P: 0.6%; Cu: 0.8%; Cr: 0.3%; V : 1%; N: 1.5%, Co: 8%; the rest is Fe, the preparation process is the same as in Example 3, and the mechanical performance of the brake disc is tested according to the method in Example 3, and the test result is: HRC70, and the tensile strength is: 450MPa.

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Abstract

The invention discloses a powder metallurgy brake disc, which includes a brake disc body and a heat dissipation device. The brake disc body includes a first brake disc and a second brake disc. There is a central hole, the installation surface is connected to the first brake disc, there is a small space between the installation surface and the first brake disc, the center of the first brake disc is hollow, and the outer surface of the first brake disc is the first brake surface , the position corresponding to the hollow on the first braking surface is provided with heat dissipation holes, and a plurality of sets of copper tubes are run through the edge circumference of the first braking surface, and a plurality of connecting blocks are welded in a ring shape on the inner side of the first braking surface, The other side of the connecting block is welded with a second brake disc, the center of the second brake disc is a small hole, and the outer surface of the second brake disc is the second braking surface. The invention also discloses the brake disc The preparation process and heat dissipation device have the characteristics of high hardness, strong wear resistance and good heat dissipation.

Description

technical field [0001] The invention relates to the technical field of brake discs, in particular to a powder metallurgy brake disc and a production process thereof. Background technique [0002] The brake disc, in simple terms, is a round plate, which is an important part of the vehicle braking system. Its performance directly affects the driving safety of the car. It also rotates when the car is moving, and the brake calipers clamp the brake disc to produce For the braking force, when the brake is stepped on, it clamps the brake disc to slow down or stop. The brake disc has a good braking effect and is easier to maintain than drum brakes. [0003] Ordinary brake discs adopt gray cast iron casting process. During the casting process, the temperature of molten iron, material distribution and other factors have a serious impact on the finished product rate of brake disc blanks. The proportion of blanks processed by CNC machining is as large as 1:1.4-1:1.5, resulting in energy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/12F16D55/226F16D65/18F16D65/84F16D66/00B23P15/18C22C38/02C22C38/04C22C38/60C22C38/20C22C38/24C22C38/30F16D121/04
CPCF16D55/226F16D65/12F16D65/128F16D65/125F16D65/0031F16D65/18F16D65/84B23P15/18C22C38/02C22C38/04C22C38/60C22C38/20C22C38/24C22C38/30C22C38/001F16D2065/1328F16D2065/1344F16D2121/04F16D2055/0016F16D2200/0008F16D2250/0023F16D2250/00F16D2066/001
Inventor 娄效彬于召光张丽丽
Owner LAIZHOU BAOYI MACHINERY CO LTD
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