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Piston ring manufacturing process beneficial to chromium plating quality

A manufacturing process, piston ring technology, applied in the field of piston ring manufacturing process, can solve the problems of increased air leakage of piston rings, poor processing technology, increased fuel consumption, etc., to reduce machining allowance and improve service life , the effect of slowing down the amount of wear

Inactive Publication Date: 2014-12-03
CHENGDU HENGTONG ZHAOYE PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Full chrome-plated outer circle piston ring has good processing technology, high yield, relatively low cost, and good wear resistance, but because of its special processing technology, the outer circle of the piston ring must be chamfered or rounded, which is It has buried hidden dangers for the increase of piston ring air leakage and the increase of internal combustion engine oil and fuel consumption; similarly, the existing outer circle fully inlaid chrome plating also has the disadvantages of poor wear resistance and poor processing technology
[0003] The semi-inlaid chrome plating on the outer circle takes into account the design advantages of the full chrome-plated and full-inlaid chrome-plated piston rings. However, the processing technology is poor and the scrap rate is high. With the development of internal combustion engines in the direction of high speed, high power, low fuel consumption and low emissions, how to further optimize the outer circle semi-inlaid chrome plating process is an important way to improve the performance of piston rings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Piston ring manufacturing process conducive to chrome plating quality, including clamping, inner and outer circle profiling, insert groove forming, chamfering of outer corners, chrome plating, outer circle forming grinding and honing steps;

[0018] The mosaic groove forming step adopts cutting treatment;

[0019] The turning process includes two processes of rough turning and finish turning, and the finish turning process includes two working steps of semi-finish turning and finish turning.

[0020] Compared with the existing technology, the process route determined above is that the clamping step is set before the mosaic groove forming and chrome plating steps, and the mosaic groove forming is processed by turning, so that in this process route, the inner and outer circles are profiling and inlaid at one time. Groove cutting and chrome plating can be completed on the same rotary shaft, and the piston needs to be clamped to the forming mill, and the cutting tools used ...

Embodiment 2

[0022] This embodiment is further limited on the basis of Embodiment 1: a further technical solution is: in order to further ensure the quality of the product, the honing step further includes an inspection step.

[0023] In order to eliminate the phenomenon of uneven chrome plating, improve the service life of the product and the accuracy of matching with the cylinder body, the cylindrical forming grinder includes the contour grinding process of the left and right grooves of the inlay groove after the chrome plating of the inlay groove.

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Abstract

The invention discloses a piston ring manufacturing process beneficial to chromium plating quality. The piston ring manufacturing process comprises the steps of clamping, inner and outer circle profiling, inlaying groove shaping, chamfering of an external angle, chromium plating, outer circle shaping grinding and honing; the inlaying groove shaping step adopts turning treatment; the turning treatment comprises two processes of rough turning and finish turning; the finish turning process comprises two process steps of half finish turning and finish turning. The process route is high in processing efficiency, uniform in thickness of a chromium coating, high in turning precision and long in service life of the cutting tool.

Description

technical field [0001] The invention relates to the field of engine parts production and manufacturing technology, in particular to a piston ring manufacturing technology that is beneficial to the quality of chrome plating. Background technique [0002] In order to improve the service life of the piston ring, the outer surface of the piston ring is chrome-plated during production. Inlaid chrome three forms. Full chrome-plated outer circle piston ring has good processing technology, high yield, relatively low cost, and good wear resistance, but because of its special processing technology, the outer circle of the piston ring must be chamfered or rounded, which is It has buried hidden dangers for the increase of piston ring air leakage and the increase of internal combustion engine oil and fuel consumption; similarly, the existing outer circle fully inlaid chrome plating also has the disadvantages of poor wear resistance and poor processing technology. [0003] The semi-inla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/06
Inventor 吴光武
Owner CHENGDU HENGTONG ZHAOYE PRECISION MACHINERY
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