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High-speed train brake disc hub forging die and design method thereof

A technology of high-speed trains and design methods, applied in the field of forging, can solve problems such as waste, large machining allowance, and long machining cycle

Active Publication Date: 2012-12-12
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional free forging method, all the metal between the teeth is processed and removed, resulting in great waste
Large machining allowance on the outer surface and inner hole leads to low blank utilization rate, long processing cycle and low production efficiency

Method used

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  • High-speed train brake disc hub forging die and design method thereof
  • High-speed train brake disc hub forging die and design method thereof
  • High-speed train brake disc hub forging die and design method thereof

Examples

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Embodiment

[0200] The forged part of this embodiment is a brake disc hub of a high-speed train from 200 km / h to 350 km / h. The material of the blank is 40CrA, the part weighs 18.218Kg, the heating temperature of the blank is 1200° C., and the material of the mold is 55CrNi. The machining allowance after forging is designed to be 5mm.

[0201] In this embodiment, the key parameters obtained by the Deform simulation software are: the optimized preform continuous skin thickness h 预 It is 32-40mm. Then, the main dimensions of the pre-forging upper die are obtained by combining the analytical method: the depth of the inner cavity of the V-shaped base of the pre-forging upper die is 93mm, the taper of the outer wall of the V-shaped base of the pre-forging upper die is 3°~5°, and the cone of the pre-forging upper die is The height of the boss is 64-80mm, and the taper of the conical boss of the pre-forging upper die is 5°-7°; the main dimensions of the pre-forging lower die are obtained through...

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Abstract

The invention belongs to the field of forging, particularly relates to a high-speed train brake disc hub forging die and a design method thereof, and is applicable to design processes of high-speed train brake disc hub dies and preformed blanks. A near-net-shape preformed blank, a preforging upper die, a preforging lower die, a finish-forging upper die and a punch are designed by combination of an analytic method and a finite element modeling method, and cooperating use methods of the different dies are also provided. By the aid of the dies and the preformed blank which are designed by the method, brake disc hub forged parts meeting standards of rolling stock research institution of China academy of railway sciences can be produced. Since the dies designed by the method are used for forging the preformed blanks, the produced brake disc hubs are high in forming quality and have symmetrical appearance, uniform streamline and uniform machining allowance. In addition, as the dies designed by the method are used for manufacturing the high-speed train brake disc hubs, raw materials can be saved, production cycle can be shortened, machining allowance is lowered, and dimensional precision is increased.

Description

technical field [0001] The invention belongs to the field of forging, in particular to a high-speed train brake disc hub forging die and a design method thereof. Background technique [0002] Brake disc hub is a key component of high-speed trains and plays an important role in the braking of high-speed trains. The wall of the forging is thin, and the teeth are difficult to form. Due to its special working environment, extremely high requirements are placed on the structure and performance of forgings, and the manufacturing is difficult. At present, almost all such forgings in my country rely on imports, which restricts the development of my country's high-speed rail industry. [0003] In the traditional free forging method, all the metal between the teeth is processed and removed, resulting in great waste. The machining allowance of the outer surface and the inner hole is large, resulting in low blank utilization rate, long processing cycle and low production efficiency. ...

Claims

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Application Information

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IPC IPC(8): B21J13/02B23P15/24
Inventor 张龙孙明月李殿中
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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