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Engine camshaft and preparation method thereof

A camshaft and engine technology, which is applied to engine components, machines/engines, mechanical equipment, etc., can solve the problems of single material of engine camshafts, cumbersome manufacturing process and high economic cost, and achieve guaranteed service life, low quality cost, guaranteed the effect of strength

Inactive Publication Date: 2014-07-30
SUZHOU INDAL PARK INSTITUE OF VOCATIONAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For this reason, the technical problem to be solved by the present invention is that the material of the engine camshaft in the prior art is single, the manufacturing process is cumbersome, and the economic cost is relatively high, thereby proposing a kind of engine camshaft using composite material and its preparation method

Method used

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  • Engine camshaft and preparation method thereof
  • Engine camshaft and preparation method thereof
  • Engine camshaft and preparation method thereof

Examples

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Embodiment 1

[0032] This embodiment provides an engine camshaft, such as figure 1 and figure 2 As shown, it includes a main shaft 1, a plurality of cams and bearings 2, and a bearing 2 is fixedly installed between each of the cams and at both ends of the main shaft 1 through a bearing fixing plate. The cams include an oil pump cam 3, an air intake The cam 4 and the exhaust cam 5 are fitted and installed on the main shaft 1, wherein each of the cams includes a wear-resistant layer 6, and the wear-resistant layer 6 is made of composite materials.

[0033] Preferably, the composite material of the wear-resistant layer 6 is hard alloy material. The hard alloy material is made of high-hardness tungsten carbide, titanium carbide, etc. as a matrix, and bonded metal cobalt, nickel, etc. by powder metallurgy. There are a large number of carbides in cemented carbide, which has a high melting point, high hardness, and high wear resistance.

[0034] Preferably, the composite material of the wear-r...

Embodiment 2

[0039] The present embodiment provides a kind of preparation method of engine camshaft, as image 3 shown, including the following steps:

[0040] S1: Carry out rough machining on the camshaft, and reserve a certain space margin on the surface of each cam;

[0041] S2: Composite a layer of composite material in the reserved space on each cam surface to form a wear-resistant layer to meet the precision requirements of the finished camshaft;

[0042] S3: cleaning the surface of the camshaft and packaging it into a finished product.

[0043] The rough machining of the camshaft in the step S1 is the same as the prior art, mainly including casting / forging blank-milling end face drilling center hole-drilling oil hole, deburring-rough and finish turning journal-rough grinding journal and shoulder -Cleaning the root oil groove, chamfering -finishing the journal, shoulder and end face -milling the keyway and other processes. Through the rough and finish machining of the camshaft, a ...

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Abstract

The invention relates to an engine camshaft. The engine camshaft comprises a main shaft, a plurality of cams and bearings, wherein the main shaft of the camshaft is made of one material for maintaining tenacity and strength; part of the surface of each cam adopts another abrasive resistant material to form an abrasive resistant layer so as to have resistance to abrasion and effectively ensure the service life of the engine camshaft. According to the preparation method, a heat treatment quenching process, a flaw detection process and a hardness test process are eliminates, loss of waste products of which the surfaces have slight cracks due to quenching is avoided, and the comprehensive economic cost and the quality cost are low.

Description

technical field [0001] The invention relates to an engine camshaft, in particular to an engine camshaft and a preparation method thereof. Background technique [0002] The camshaft is one of the main components in the engine, and its function is to control the opening and closing of the valves. Because the valve movement law is related to the power and running characteristics of an engine, the camshaft design plays a very important role in the engine design process. [0003] On the camshaft of the engine, there are oil pump cams for pumping oil, intake cams and exhaust cams for gas distribution. Existing camshaft materials are all homogeneous, usually made of ductile iron. The process is generally to cast or forge a blank first, then do rough machining, semi-finish machining, and then finish machining on a grinding machine and other machine tools until it is finished. In order to improve the hardness and wear resistance of oil pump cams, intake cams and exhaust cams, inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/047C23C4/12C23C4/10B23P15/14C23C4/06
Inventor 杨运勤
Owner SUZHOU INDAL PARK INSTITUE OF VOCATIONAL TECH
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