Machining technology capable of increasing compressive stress depth of surface of rolling wheel

A technology of surface compressive stress and processing technology, used in metal material coating technology, manufacturing tools, coatings, etc., can solve problems affecting the normal operation of common rail oil pumps, unable to meet the performance requirements of rollers, and prone to pitting on the surface of rollers, etc. problems, to avoid surface pitting, improve surface quality, and enhance wear resistance.
CN111411202AActive Publication Date: 2020-07-14NANJING WEIFU JINNING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING WEIFU JINNING
Publication Date
2020-07-14

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Abstract

The invention relates to a processing technology capable of increasing compressive stress depth of the surface of a rolling wheel. The machining technology comprises the following steps of rough turning, heat treatment, excircle rough grinding, shot blasting, and two-end-face grinding, wherein fine grinding on an excircle and a middle hole is conducted by using a double-disc grinder to machine theexcircle and the middle hole into the size of a finished product in the two-end-face grinding step. Compared with a conventional machining technology of the rolling wheel, a shot-throwing process isadded after rough grinding on the excircle is conducted, steel shots with a diameter of 0.5mm are used to continuously impacts the surface of the rolling wheel in a shot blasting machine to greatly enhance the surface compressive stress of the rolling wheel, a compressive stress hardened layer with sufficient depth is obtained, meanwhile, too many hardened layers cannot be consumed in subsequent machining, and the abrasion resistance of the rolling wheel is greatly enhanced.
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Description

technical field

[0001] The invention belongs to the technical field of roller machining, and in particular relates to a process method for increasing the depth of compressive stress on the surface of a roller. Background technique

[0002] The tappet part is one of the key components in the high-pressure common rail fuel injection pump, and the roller, as the part with the highest working frequency, often has the problem of insufficient surface compressive stress depth after conventional processing, and the surface quality of the roller It directly affects whether the component is qualified or not. Therefore, in the actual work of the common rail pump, once the strength of the roller surface is insufficient, pitting is easy to occur, which affects the normal operation of the common rail oil pump, and may seriously cause damage to the pump.

[0003] At present, the finishing of roller parts is mostly limited to conventional processes such as conventional heat treatment, grind...

Claims

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