Process for machining rail traffic driven gear

A passive gear and processing technology, which is applied to components with teeth, metal processing equipment, gear tooth manufacturing devices, etc. The effect of cutting deformation, ensuring accuracy and improving efficiency

Active Publication Date: 2012-10-03
重庆方禾机电设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, passive gears are generally not forged with dies during manufacturing. The weight of the forged blank is very high, which causes a very large workload for subsequent processing. The manufacturing difficulty and work intensity are relatively high. In the process of gear hobbing, generally rolling It takes about 16 hours, and the clamping cannot hold down the large end face, the strength is low, there will be some deformation during grinding, and the grinding accuracy is difficult to guarantee, and it takes 30 minutes to align and clamp each piece, which is inconvenient and also not fast

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The processing technology of the rail transit passive gear of the present embodiment comprises the following steps:

[0025] a. Blank forging: heat the alloy steel in a heating furnace and forge it into a tooth blank on a forging press, and set the machining allowance for the outer contour to 2-4mm;

[0026] b. Rough machining: Rough turning the tooth blank in step a, so that the surface roughness of the tooth blank reaches Ra6.3;

[0027] c. Isothermal normalizing: heat the tooth blank at 920-950°C for 2-4 hours, quickly cool it to the pearlite transformation zone of 850°C, keep it warm at this temperature, and then cool it in air or air;

[0028] d. Tooth processing:

[0029] The right end face of the tooth blank is machined by turning the top circle of the supporting inner hole, and the left end face is processed by clamping the tooth top circle, so that the overall surface roughness can reach Ra1.6-Ra6.3;

[0030] Drilling and tapping: tap the bottom hole and tape...

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Abstract

The invention provides a process for machining a rail traffic driven gear, which improves a forging process of a blank, so as to establish a good foundation for follow-up machining. According to a hobbing procedure, two gear blanks are hobbed simultaneously, and the large end surfaces are directly pressed by using a clamp. Therefore, the strength is good; the grinding transformation is effectively avoided; the hobbing efficiency is improved; the grinding rigidity is enhanced; and the grinding precision is ensured.

Description

technical field [0001] The invention relates to a gear processing technology, in particular to a processing technology of rail transit passive gears. Background technique [0002] The rail transit passive gear is an important part of the rail transit transmission system and then transmitted to the driving wheels to make the car body run. The quality requirements of gears are also high, so the requirements for their processing technology are also particularly high, which is directly related to the comfort and safety of rail transportation. However, passive gears are generally not forged with dies during manufacturing. The weight of the forged blank is very high, which causes a very large workload for subsequent processing. The manufacturing difficulty and work intensity are relatively high. In the process of gear hobbing, generally rolling It takes about 16 hours, and the clamping cannot hold down the large end face, the strength is low, there will be some deformation during...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14B21J5/00B23F23/06
Inventor 何沛均吴召荣
Owner 重庆方禾机电设备有限公司
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