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Torsion bar shaft machining method

A processing method and torsion bar technology, applied in the field of shaft processing, can solve the problems of poor mechanical properties of torsion bar shafts, achieve consistent mechanical properties, and improve the effect of comprehensive mechanical properties

Inactive Publication Date: 2018-12-07
齐齐哈尔北盛机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a processing method of a torsion bar shaft to overcome the problem of poor mechanical properties of the torsion bar shaft in the prior art

Method used

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  • Torsion bar shaft machining method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] figure 1 It is a flow chart of Embodiment 1 of the method for machining a torsion bar shaft according to the present invention.

[0037] Please combine figure 1 , the present embodiment provides a method for machining a torsion bar shaft, comprising the following steps:

[0038] Step 101: Forging the raw material to form a torsion bar shaft forging.

[0039] The torsion bar shaft is a slender shaft component, which is generally used in the anti-rolling system of the EMU. In order to make the mechanical properties of the torsion bar shaft consistent at each position, the raw material can be processed by forging process.

[0040] The raw material can be purchased square steel or round steel and other materials, which are not specifically limited here. Preferably, the material of the torsion bar shaft is 52CrMo4.

[0041] Forging is a processing method that uses forging machinery to apply pressure to metal blanks to cause plastic deformation to obtain forgings with cer...

Embodiment 2

[0085] figure 2 It is a flow chart of Embodiment 2 of the torsion bar shaft processing method of the present invention.

[0086] Please combine figure 2 , in this embodiment, before performing surface strengthening treatment on the finished torsion bar shaft, step 109 is also included: performing a preliminary inspection on the torsion bar shaft.

[0087] Preliminary inspection can find out whether there are defects in the torsion bar shaft in time, thereby improving the pass rate of the torsion bar shaft. There are many methods for preliminary inspection, such as visual inspection, electromagnetic flaw detection, ultrasonic flaw detection, etc.

[0088] Preferably, the preliminary detection can be electromagnetic flaw detection. The principle of electromagnetic flaw detection is to use electromagnetic principles to find metal defects. This method magnetizes metal parts, the magnetic resistance at the defect will increase, and the magnetic force lines here will change accor...

Embodiment 3

[0093] image 3 It is a flow chart of Embodiment 3 of the torsion bar shaft processing method of the present invention.

[0094] Please combine image 3 , in this embodiment, after performing surface strengthening treatment on the finished torsion bar shaft, step 110 is further included: performing final inspection on the torsion bar shaft.

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Abstract

The invention provides a torsion bar shaft machining method. The torsion bar shaft machining method comprises the following steps that a raw material is forged to form a torsion bar shaft forge piece;preliminary heat treatment of the torsion bar shaft forge piece is conducted; first-time straightening and first-time stress relief annealing of the torsion bar shaft forge piece are conducted; roughmachining of the torsion bar shaft forge piece is conducted; quenched-tempered heat treatment of the after-rough-machining torsion bar shaft forge piece is conducted; second-time straightening and second-time stress relief annealing of the torsion bar shaft forge piece are conducted; finish machining of the torsion bar shaft forge piece is conducted to form a torsion bar shaft; and surface strengthening treatment of the after-finish-machining torsion bar shaft is conducted. According to the torsion bar shaft machining method, crystal grains of the torsion bar can be refined, forging fiber coherence is guaranteed, so that the mechanical property of each position of the torsion bar shaft is consistent, and the comprehensive mechanical property of the torsion bar shaft is improved.

Description

technical field [0001] The invention relates to the technical field of shaft processing, in particular to a method for processing a torsion bar shaft. Background technique [0002] When high-speed EMUs pass through curves and turnouts, they are easily affected by strong lateral winds, causing the car body to tilt or become unstable. Therefore, it is necessary to increase the anti-roll stiffness of the EMU car body to limit its roll angle. [0003] In the prior art, the car body of the EMU is provided with a torsion bar shaft. Under the action of strong transverse wind, the torsion bar shaft undergoes elastic torsion deformation to limit the roll angle of the car body and ensure the safe operation of the EMU. The processing material of the torsion bar shaft is generally purchased round steel, and then the round steel is partially upset and formed. [0004] However, local upsetting will destroy the continuity of the fibers of the torsion bar shaft, making the mechanical prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 薛国义邢奎民孙秀华许磊丁振李秀敏赵兴起李吉军
Owner 齐齐哈尔北盛机械制造有限公司
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