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Precise forming process for brake disc of high-speed train

A high-speed train, precision forming technology, applied in the direction of wheels, vehicle parts, railway car body parts, etc., can solve the problems of high demand for steel forged brake disc equipment, incomplete filling of heat dissipation ribs, product quality, instability, etc., to achieve Improved material utilization, simple manufacturing process, and simple shape

Inactive Publication Date: 2017-05-31
NANJING INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the existing high-speed train brake disc forming problems, and propose a high-speed train brake disc precision forming process, which solves the high demand for steel forged brake disc equipment, incomplete filling of heat dissipation ribs and product Unstable quality and other problems have realized the precision forming of high-speed train brake discs

Method used

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  • Precise forming process for brake disc of high-speed train
  • Precise forming process for brake disc of high-speed train
  • Precise forming process for brake disc of high-speed train

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) According to figure 1 Design the forging drawing according to the part drawing shown, and add the machining allowance and machining allowance appropriately. The forging drawing obtained from the design is as follows figure 2 shown.

[0037] (2) According to the forging drawing, a round steel billet with a diameter of 200mm and a height of 420mm is obtained by sawing.

[0038] (3) Use an induction heating furnace to heat the round bar material obtained by blanking to 1180°C.

[0039] (4) Upsetting the heated billet into a 100mm-high round cake with a die forging hammer, and punching the round cake-shaped billet out of a central hole with a diameter of 120mm with a punch.

[0040] (5) On the reaming machine, expand the circular pie-shaped blank with holes into a ring-shaped blank of the required size, the inner diameter of which is slightly larger than the inner diameter of the forging, and the outer diameter of which is slightly smaller than the outer diameter of ...

Embodiment 2

[0047] Using the same forming process as in Example 1, the induction heating temperature of the cylindrical blank is controlled to be 1220°C, the heating temperature of the uppermost layer of the annular blank gradient heating is 840°C, the heating temperature of the middle layer is 1000°C, and the heating temperature of the bottom layer is 1160°C. Open die forging and closed die forging combined forming.

Embodiment 3

[0049] Using the same forming process as in Example 1, the induction heating temperature of the cylindrical blank is controlled to be 1200°C, the heating temperature of the uppermost layer of the annular blank gradient heating is 880°C, the heating temperature of the middle layer is 1030°C, and the heating temperature of the bottom layer is 1180°C. Open die forging and closed die forging combined forming.

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Abstract

The invention discloses a precise forming process for a brake disc of a high-speed train, belongs to the field of technical methods for forging forming, and solves the problems of difficult filling, low precision, high equipment needs and the like of a forged steel brake disc of a high-speed train. The process disclosed by the invention comprises blanking, heating, upsetting, punching, reaming, gradient heating, open-closed composite die-forging, trimming and deburring, heat treatment and machining. The brake disc is heated to different temperatures according to the changes of a height, die parts corresponding to radiating rib parts of the brake disc are made into independent lower punch pin blocks, and the lower punch pin blocks move upwards to apply a pressure on metal, and complete closed die-forging forming for the radiating rib parts after an upper die presses downwards to complete open die-forging forming for a brake disc main body. The brake disc in the invention is low in material deformation and easy to form; and moreover, the utilization rate of materials is high, the life of the die is high, and the manufacturing cost is saved. The process is suitable for large-batch production for forge pieces such as brake discs of the high-speed rails, urban rails and the like.

Description

technical field [0001] The invention relates to a precision forming process of a brake disc of a high-speed train, which belongs to the field of forging and forming technical methods. Background technique [0002] Compared with the cast brake disc, the forged brake disc has better mechanical properties at room temperature and high temperature, good toughness, high thermal crack resistance, good wear resistance and thermal fatigue resistance. Due to its high quality requirements, it is difficult to manufacture. At present, the forged steel brake discs used in China's high-speed trains are still mainly imported from abroad. With the rapid development of high-speed trains in my country, the demand for independent intellectual property rights is becoming more and more urgent. Therefore, the manufacturing and forming technology of high-speed train brake discs is the focus of localization and independent innovation. [0003] Due to the high height and narrow width of the heat d...

Claims

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Application Information

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IPC IPC(8): B21K7/14B21K1/28B21J1/06B21J5/02
CPCB21K7/14B21J1/06B21J5/025B21J5/027B21K1/28
Inventor 李振红胡谦黄英娜巴志新张保森王章忠叶圣
Owner NANJING INST OF TECH
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