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A laser additive manufacturing method for high-speed train brake discs

A laser additive, high-speed train technology, applied in additive manufacturing, additive processing, energy efficiency improvement, etc., can solve the problems of unstable casting quality, cumbersome brake disc process, poor casting process, etc., to avoid residual stress. Larger, avoids overall weight gain, reduces stress concentration effects

Active Publication Date: 2020-04-03
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, high-speed train brake discs are cast from high-purity alloy steel, and their heat dissipation performance and overall strength depend on the complex columnar structure of the brake disc, which is poor in casting process and difficult to cast; The process is cumbersome, the process cycle is long, the material requirements are high, the casting quality is unstable, and the yield is low; at this stage, domestic high-speed train brake discs mainly rely on imports, and the price is expensive

Method used

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  • A laser additive manufacturing method for high-speed train brake discs
  • A laser additive manufacturing method for high-speed train brake discs
  • A laser additive manufacturing method for high-speed train brake discs

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A laser additive manufacturing method for a brake disc of a high-speed train, the steps of which are as follows:

[0046] s1. Design and establish the three-dimensional model of the brake disc through drawing software, such as Figure 1 to Figure 4 As shown, the brake disc includes a brake disc main body with a hole in the disc body and a mounting hole seat 2.1 uniformly arranged radially inside the brake disc main body. The coaxial annular disk body (upper annular disk body 1.1 and lower annular disk body 1.2) of the hole in the body and sandwiched between the two annular disk bodies (upper annular disk body 1.1 and lower annular disk body 1.2) The heat dissipation ribs 1.3 are evenly arranged, and the installation hole seat 2.1 is provided with a mounting hole 2.2; the heat dissipation ribs 1.3 are one end close to the ring disc body (the upper ring disc body 1.1 and the lower ring disc body 1.2) ring, the other end is close to the circular arc strip structure of the...

Embodiment 2

[0056] A laser additive manufacturing method for a brake disc of a high-speed train, the steps of which are as follows:

[0057] s1. Design and establish a three-dimensional model of the brake disc through drawing software. The brake disc includes a brake disc body with a hole in the disc body and a mounting hole seat 2.1 uniformly arranged radially on the inner side of the brake disc body. The main body of the brake disc is composed of two upper and lower coaxial annular discs (upper annular disc 1.1 and lower annular disc 1.2) with disc holes in the upper and lower discs and clamped between the two annular discs (upper annular disc Body 1.1 and the lower circular disc body 1.2) composed of uniformly arranged heat dissipation ribs 1.3, the mounting hole seat 2.1 is provided with mounting holes 2.2; one end of the heat dissipation ribs 1.3 is close to the circular disc body (upper circular Disk body 1.1 and lower ring disk body 1.2) the inner ring, the other end is close to th...

Embodiment 3

[0066] A laser additive manufacturing method for a brake disc of a high-speed train, the steps of which are as follows:

[0067] s1. Design and establish a three-dimensional model of the brake disc through drawing software. The brake disc includes a brake disc body with a hole in the disc body and a mounting hole seat 2.1 uniformly arranged radially on the inner side of the brake disc body. The main body of the brake disc is composed of two upper and lower coaxial annular discs (upper annular disc 1.1 and lower annular disc 1.2) with disc holes in the upper and lower discs and clamped between the two annular discs (upper annular disc Body 1.1 and the lower circular disc body 1.2) composed of uniformly arranged heat dissipation ribs 1.3, the mounting hole seat 2.1 is provided with mounting holes 2.2; one end of the heat dissipation ribs 1.3 is close to the circular disc body (upper circular Disk body 1.1 and lower ring disk body 1.2) the inner ring, the other end is close to th...

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Abstract

A laser additive manufacturing method for a high-speed train brake disc, the steps of which are as follows: s1, design and establish a three-dimensional model of the brake disc through drawing software; s2, design the process support structure of the brake disc, and then perform two-dimensional processing Obtain the two-dimensional slice data and import it into the laser additive manufacturing system; s3, select the raw material for laser additive manufacturing: 24CrNiMo high-performance alloy steel powder; s4, use the laser selective melting method to prepare the brake disc and process support structure, The process parameters of laser selective melting are: laser power 400-500W, scanning speed 800-1000mm / s, scanning distance 0.06-0.10mm, powder layer thickness 30-40μm, laser spot size: 80-100μm, scanning The method is checkerboard scanning; s5, cleaning the floating powder, removing the substrate and the mesh process support; then performing sandblasting and abrasive flow treatment; s6, stress relief annealing, and the product is obtained. The method can reduce the research and development cycle of the brake disc, optimize the structure of the brake disc, and improve the comprehensive performance of the brake disc.

Description

technical field [0001] The invention relates to a laser additive manufacturing method for a high-speed train brake disc, belonging to the field of high-speed train brake disc manufacturing. Background technique [0002] With the continuous improvement of the running speed of high-speed trains, higher requirements are put forward for the braking system of high-speed trains. The brake system is one of the most important key core technologies of high-speed trains, and the brake disc is one of the core components with the highest technical content in the brake system, which plays a vital role in the safe operation of high-speed trains. [0003] When emergency braking is adopted during the operation of high-speed trains, the huge thermal load and thermal shock of the brakes will cause a large temperature gradient on the brake disc body, which will cause great thermal stress. Requirements for strength and thermal crack resistance, wear resistance, and thermal conductivity. At pr...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F5/00C22C38/44C22C38/02C22C38/04
CPCC22C38/02C22C38/04C22C38/44B22F5/00B33Y10/00B22F10/00B22F10/66B22F10/64B22F10/28B22F10/366B22F10/32Y02P10/25
Inventor 陈辉陈勇易伟吴影熊俊董世运
Owner SOUTHWEST JIAOTONG UNIV
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