Near-net forming method for split type axle box body for standard motor train unit

A near-net-shaping, shaft-box technology, applied in forging/pressing/hammering machinery, manufacturing tools, metal processing equipment, etc., can solve problems such as inability to forge

Active Publication Date: 2019-06-28
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problem that the upper box body of the split-type axle box body

Method used

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  • Near-net forming method for split type axle box body for standard motor train unit
  • Near-net forming method for split type axle box body for standard motor train unit
  • Near-net forming method for split type axle box body for standard motor train unit

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Embodiment Construction

[0129] The present invention is described in detail below in conjunction with accompanying drawing:

[0130] Below in conjunction with DOC-0000074521_02_Technology SFEZ20 turn open (2014) No. 657 technical word speed 350 kilometers per hour Chinese standard EMU bogie shaft casing and accompanying drawings the present invention is described in detail:

[0131] The invention provides a near-net forming method for forging a standard EMU aluminum alloy split axle box body using a multi-directional die forging process. The tensile strength, yield strength and elongation of the axle box body obtained by the method reach the level of black metal The level of the cast axle box, the weight is only one-third of the ferrous metal cast axle box.

[0132] The multidirectional die forging preforming of described multidirectional die forging process:

[0133] refer to Figure 8 and Figure 9 , the multi-directional die forging pre-forming is to form the rib part of the middle rod, so that...

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Abstract

The invention discloses a near-net forming method for a split type axle box body for a standard motor train unit, and solves the problem that an upper box body of the split type axle box body for a standard motor train unit bogie cannot be forged by adopting an opening type forging process. The near-net forming method for the split type axle box body for the standard motor train unit comprises thesteps of (1) blanking: blanking according to the calculated length; (2) heating: heating a cylindrical workblank to 480+/-10 DEG C, and preserving heat for 4 to 6 hours; (3) rolling forging for forming a blank: enabling the cross sectional area of each feature section of the blank to be approximately close to the corresponding cross sectional area of the axle box body; (4) multi-directionally dieforging and pre-shaping: shaping a rib plate part of a center rod part; (5) multi-directionally die forging and finally shaping: shaping an inner contour, an outer contour and a projecting part on the outer contour; (6) punching the wad: punching the wad of a large hole and a small hole; (7) dividing: dividing an integrated forge piece of the upper box body, a lower box body and a gland into three independent forge pieces; and (8) shaping the lower box body, wherein the height of the lower box is reduced, and the dimension of the outer contour is increased to meet the requirement of the dimension of the forge piece of the lower box body.

Description

technical field [0001] The invention relates to a forming method in the technical field of aluminum alloy processing, and more precisely, the invention relates to a near-net forming method for a component-type axle box of a standard train. Background technique [0002] With the continuous development of science and technology, high-speed rail has been widely used in our country. The continuous speed increase of rail vehicles has put forward higher and higher requirements for the lightweight of vehicles. Among them, reducing the mass of the standard EMU axle box plays an important role in the weight reduction and energy saving of vehicles. [0003] In the prior art, the metal material used for the axle box of the standard EMU is ferrous metal, which is formed by a casting process, which cannot meet the lightweight requirements of the standard EMU during high-speed operation. [0004] Therefore, under the condition of meeting the requirements of the standard EMU axle box for ...

Claims

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Application Information

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IPC IPC(8): B21J5/02B21J13/02B21J1/06B21J13/10B23P15/00
Inventor 何东野陈庆敏
Owner JILIN UNIV
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