20Cr cam machining process

A processing technology and cam technology, which is applied in the field of 20Cr cam processing technology, can solve problems such as easy cracks in the cam, and achieve the effects of solving cracks, improving hardness and high toughness

Inactive Publication Date: 2017-05-31
CHONGQING BORUN MOLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that cracks are prone to appear in the existing cam processing process, the present invention provides a 20Cr steel cam processing process

Method used

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  • 20Cr cam machining process
  • 20Cr cam machining process

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Embodiment Construction

[0021] Describe in detail below in conjunction with specific embodiment according to accompanying drawing:

[0022] A kind of 20Cr steel cam processing technology, comprises the following steps:

[0023] S1: blank forming, forming a blank with a cam profile by forging or casting;

[0024] S2: Rough turning, the two end faces and the inner hole of the cam are roughly machined on the lathe;

[0025] S3: Milling the cam profile, machining the cam profile on a milling machine or machining center;

[0026] S4: Carburizing, carburizing the surface of the cam profile;

[0027] S5: semi-finishing, semi-finishing the two end faces and inner holes of the cam on the lathe;

[0028] S6: quenching, performing quenching treatment on the cam processed in step S5;

[0029] S7: Finish turning, finishing the two end faces and the inner hole of the cam on the lathe;

[0030] S8: Coarsely grinding the cam, rough grinding the profile of the cam on the grinding machine;

[0031] S9: tempering...

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PUM

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Abstract

The invention discloses a 20Cr cam machining process. The cam transmission is an important part in mechanical transmission; and in particular, in manufacturing of some fixtures, workpieces are generally loaded, unloaded and clamped by a cam clamping mode. In the transfer process of a cam structure, the power is generally transferred by dint of a molded surface of the cam, so that the requirement on the molded surface of the cam is higher in the manufacturing process, and the size and the surface roughness are both higher in requirement; in traditional machining, the grinding is generally adopted as the last procedure; but because of special molded surface of the cam, in particular in the lift period of grinding the cam, cracks are liable to generate; and in traditional machining, the crack generation probability is 8%. The 20Cr cam machining process comprises the steps of: blank formation; rough turning; cam profile milling; carburization; semi-finish turning; quenching; finish turning; rough grinding of the cam; tempering; finish grinding of the cam; and clamping.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a 20Cr cam processing technology. Background technique [0002] Cam transmission is an important part in mechanical transmission, especially in the manufacture of some fixtures, the way of cam clamping is usually used to load, unload and clamp workpieces. During the transmission process, the cam structure generally relies on the profile of the cam to transmit power, so in the manufacturing process, the requirements for the profile of the cam are relatively high, not only the size requirements, but also the surface roughness. In the existing processing, grinding is generally used as the last process, but due to the special profile of the cam, especially when grinding the lift section of the cam, cracks are prone to occur. In the existing processing, the probability of cracks is 8 %. Contents of the invention [0003] In order to solve the problem that cracks are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 高仲华
Owner CHONGQING BORUN MOLD CO LTD
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