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Crowned tooth machining process for rail transit

A processing technology and rail transit technology, applied in metal processing equipment, metal processing machinery parts, gear teeth, etc., can solve problems such as uneven tempering of drum-shaped teeth, increase tempering range, improve tempering efficiency, and improve safety effect

Pending Publication Date: 2021-10-08
BEIJING KANGWEI HEAVY IND MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a drum-shaped tooth processing technology for rail transit, which solves the problem of uneven tempering of the drum-shaped teeth

Method used

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  • Crowned tooth machining process for rail transit
  • Crowned tooth machining process for rail transit
  • Crowned tooth machining process for rail transit

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0038] refer to Figure 1-5 , a drum-shaped tooth processing technology for rail transit, comprising the following steps:

[0039] S1: Rough machining

[0040] Select 31CrMoV9 forging blanks for rough machining, with a margin of 4-8mm;

[0041] S2: conditioning

[0042] The workpiece after rough machining is quenched and tempered, and the hardness is 32-38HRC. This hardness basis makes the workpiece not easy to deform during semi-finishing, and correspondingly avoids the possibility of deformation of the workpiece during finishing machining;

[0043] S3: semi-finishing

[0044] Semi-finishing the workpiece after quenching and tempering, the allowance is 0.4-0.8mm...

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Abstract

The invention discloses a crowned tooth machining process for rail transit, relates to the technical field of crowned tooth machining, and currently provides the following scheme for the problem that tempering of an existing crowned tooth is not uniform, the crowned tooth machining process comprises the following steps that S1, rough machining is conducted, specifically, a 31CrMoV9 forging blank material is selected, rough machining is conducted, and the allowance ranges from 4 mm to 8 mm; S2, quenching and tempering are conducted, specifically, quenching and tempering are conducted on a workpiece subjected to rough machining, and the hardness is 32-38 HRC; S3, semi-finish machining is conducted, specifically, the quenched and tempered workpiece is subjected to semi-finish machining, and the allowance ranges from 0.4 mm to 0.8 mm; S4, tempering is conducted, specifically, the workpiece subjected to semi-finish machining is put into a heat treatment device to be subjected to tempering treatment, the tempering temperature is controlled to be 500 DEG C, and heat preservation is conducted for 10 hours; S5, finish machining is conducted, and specifically, finish machining is conducted on the tempered workpiece; S6, hobbing is conducted, specifically, numerical control hobbing is conducted on the workpiece obtained after finish machining, and crowned teeth are machined; and S7, ion nitriding is conducted.

Description

technical field [0001] The invention relates to the technical field of drum-shaped gear processing, in particular to a drum-shaped gear processing technology for rail transit. Background technique [0002] Almost all rail transits in the world use drum-shaped gear couplings. The research in this area started relatively late in my country, and there are few manufacturers that can produce high-precision drum-shaped gear couplings. The drum-shaped gear couplings used in China mainly rely on imports. The main reason is that there are many technical difficulties that need to be overcome in the process of domestic drum-shaped gear processing. [0003] Generally, when the drum-shaped teeth are processed, one of the steps is tempering. The existing tempering device directly puts the drum-shaped teeth as a whole into the heating furnace, so that the drum-shaped teeth are tempered as a whole, but it is usually used in daily life. The transmission tooth part of the drum-shaped tooth, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23F5/00B23F23/06B23Q11/00
CPCB23F5/00B23F23/06B23Q11/005
Inventor 谢磊
Owner BEIJING KANGWEI HEAVY IND MACHINERY MFG CO LTD
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