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A composite manufacturing method for shaft parts based on powder sintering

A technology of shaft parts and manufacturing method, applied in the field of powder metallurgy, can solve the problems of high cost, complex process, more effective suggestions in sintering process, etc., achieve high precision, reasonable component selection, and save cleaning and grinding steps. Effect

Active Publication Date: 2019-12-13
CIXI YONGLI ELECTRIC TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned technology of combining the outer ring and inner ring of the cam with powder metallurgy materials with different properties has actually been a technology that has already been studied in this field. This type of technology focuses on the differential design of the material strength of the inner and outer rings. The relationship between machinability and sinterability has not been deeply revealed, and no more effective suggestions have been put forward in terms of sintering process. It also has the defects of complex process and high cost.

Method used

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  • A composite manufacturing method for shaft parts based on powder sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A composite manufacturing method for a shaft part based on powder sintering, the shaft part is a camshaft, comprising the steps of:

[0030] Step 1, select a seamless tube with the same diameter as the required camshaft as the material of the mandrel 1, cut it into the required length, clean or polish the cut, and the cutting method is dicing saw cutting, plasma cutting or laser cutting, The material of the seamless pipe is carbon steel;

[0031] Step 2, marking the mandrel material obtained in step 1 to mark the position where the cam and / or other protrusions need to be installed, the other protrusions are ends, journals, retaining rings, or induction rings one or more of

[0032] Step 3, performing mechanical processing or chemical etching on the mandrel material obtained in step 2, processing the marked parts where cams and / or other protrusions need to be installed into slight depressions, and the slight depressions Part means a recessed part with a depth dimension...

Embodiment 2

[0042] The difference between this embodiment and embodiment 1 is:

[0043] For the cam powder metallurgy pre-sintered compact, it includes the following components by weight (the matrix is ​​Fe): Cr content is 3.9%, C content is 2.0%, Si content is 1.1%, Zr content is 0.7%, W content is 0.1% , Cu content is 0.01%, Mn content is 0.01%;

[0044] For the powder metallurgy pre-sintered compact of the journal, it includes the following components by weight percentage (the matrix is ​​Fe): Cr content is 3.0%, C content is 1.3%, Si content is 0.4%, Zr content is 0.7%, and W content is 0.1%, the Cu content is 0.02%, and the Mn content is 0.02%.

[0045] In the composite manufacturing method of shaft parts based on powder sintering, the composition of the copper alloy flake 2 includes 2.0% Mn, 2.0% Zn, 2.0% Sn, 1.0% Si, and the rest is Cu and unavoidable impurities.

Embodiment 3

[0047] The difference between this embodiment and embodiment 1 is:

[0048] For the cam powder metallurgy pre-sintered compact, it includes the following components by weight percentage (the matrix is ​​Fe): Cr content is 3.2%, C content is 2.8%, Si content is 0.9%, Zr content is 0.4%, W content is 0.3% , Cu content is 0.01%, Mn content is 0.01%;

[0049] For the powder metallurgy pre-sintered compact of the journal, it includes the following components by weight percentage (the matrix is ​​Fe): Cr content is 2.3%, C content is 1.8%, Si content is 0.6%, Zr content is 0.4%, W content is 0.4%, the Cu content is 0.02%, and the Mn content is 0.02%.

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Abstract

According to a shaft part composite manufacturing method based on powder sintering, a seamless pipe with the diameter being the same as that of a needed finished shaft product serves as a core shaft material, and after the core shaft material is marked, the marked portion which needs to be provided with a cam and / or other convex parts is machined into a slightly sunken part; the sunken part of thecore shaft material is wrapped with a copper alloy sheet, and prefabricated powder metallurgical presintering billets of the cam and / or the other convex parts are assembled with a core shaft, so thatthe powder metallurgical presintering billets of the cam and / or the other convex parts are mounted on the sunken part wrapped with the copper alloy sheet; and an assembled piece is put into a sintering furnace to be sintered and then subjected to finish machining, and the finished product is obtained. On the basis, powder metallurgical presintering billet components of the cam and / or the other convex parts are reasonably designed.

Description

technical field [0001] The present application relates to the technical field of powder metallurgy, in particular to a composite manufacturing method based on powder sintering, which is mainly used to manufacture shaft parts such as camshafts. Background technique [0002] Powder metallurgy is a process technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to manufacture metal materials, composite materials and various types of products. The outstanding advantage of the powder metallurgy process is that it can easily realize the compounding of various types of materials or multiple parts. When the former compounding is realized, the materials can fully exert the respective characteristics of each component. When the latter compounding is realized, It can realize various connections, repairs or manufactures that cannot be realized by ordinary processing techniques. [0003] The c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/06B22F3/10C22C37/06
CPCB22F3/10B22F7/062C22C37/06
Inventor 王锐
Owner CIXI YONGLI ELECTRIC TOOLS
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