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Powder metallurgy connecting rod for automobile engine and production method of powder metallurgy connecting rod

An automotive engine, powder metallurgy technology, applied in connecting rods, mechanical equipment, shafts and bearings, etc., can solve the problems of low strength of connecting rods and residual stress of connecting rods, so as to improve product quality, increase structural strength, and increase density Effect

Inactive Publication Date: 2016-09-21
ANHUI AOTAI POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The connecting rod is the most stressed part in the automobile engine. The microstructure of the powder forged connecting rod is uniform, and its mechanical properties are better than that of the traditional die forged connecting rod. However, the traditional powder forged connecting rod has the strength of the connecting rod due to the problem of the preparation process. Not high, and there is residual stress in the prepared connecting rod

Method used

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  • Powder metallurgy connecting rod for automobile engine and production method of powder metallurgy connecting rod

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A powder metallurgy automobile engine connecting rod, comprising a connecting rod 1, a shaft hole 2 is left on the side wall of one end of the connecting rod 1, and a connecting rod groove 6 is left on the other end of the connecting rod 1, and the connecting rod groove 6 The outer side of 6 is provided with connecting rod cover 4, and the groove wall of described connecting rod groove 6 and the outer side of connecting rod cover 4 all leave screw holes 5, and the side wall of described connecting rod 1 leaves weight-reducing groove 3.

[0020] A method for preparing a powder metallurgy automobile engine connecting rod, the preparation steps of the automobile engine connecting rod are as follows:

[0021] The first step: mixing and pressing, the raw metal powder is mixed according to the ratio of 1.5 parts of copper, 1 part of molybdenum, 1 part of chromium, 2 parts of nickel, 0.5 parts of graphite, 3 parts of cobalt and 80 parts of iron, and the mixed metal powder Use ...

Embodiment 2

[0028] A method for preparing a powder metallurgy automobile engine connecting rod, the preparation steps of the automobile engine connecting rod are as follows:

[0029] The first step: mixing and pressing, the raw metal powder is mixed according to the ratio of 2 parts of copper, 0.8 parts of molybdenum, 1.5 parts of chromium, 1.5 parts of nickel, 0.6 parts of graphite, 4 parts of cobalt and 85 parts of iron, and the mixed metal powder Use a filter to filter, the filter is a 220-mesh sieve, then add the filtered metal powder to the stirring device, and add 2 parts of lubricant in proportion to stir evenly, and pour the evenly stirred metal powder directly into the connecting rod press In the blank mold, the shape of the connecting rod blank is made by pressing the press, and the pressure of the press is 230Mpa;

[0030] The second step: high-temperature sintering, the connecting rod blank is sent to the heating furnace through the mesh belt conveyor for sintering to form a d...

Embodiment 3

[0036] A method for preparing a powder metallurgy automobile engine connecting rod, the preparation steps of the automobile engine connecting rod are as follows:

[0037] The first step: mixing and pressing, the raw metal powder is mixed according to the ratio of 2.5 parts of copper, 1 part of molybdenum, 1.5 parts of chromium, 2 parts of nickel, 0.4 parts of graphite, 2 parts of cobalt and 75 parts of iron, and the mixed metal powder Use a filter to filter, the filter is a 280-mesh sieve, then add the filtered metal powder to the stirring device, and add 3 parts of lubricant in proportion to stir evenly, and pour the evenly stirred metal powder directly into the connecting rod press In the blank mold, the shape of the connecting rod blank is made by pressing the press, and the pressure of the press is 250Mpa;

[0038] The second step: high-temperature sintering, the connecting rod blank is sent to the heating furnace through the mesh belt conveyor for sintering to form a dens...

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Abstract

The invention discloses a powder metallurgy connecting rod for an automobile engine. An axle hole is reserved in the side wall at one end part of the connecting rod; a connecting rod slot is reserved in the other end of the connecting rod; a connecting rod cover is arranged at the outer side of the connecting rod slot; screw holes are separately reserved in the slot wall of the connecting rod slot and the outer side of the connecting rod cover; and a weight reducing slot is reserved in the side wall of the connecting rod. The powder metallurgy connecting rod disclosed by the invention adopts a forging and aging treatment process, the density of the connecting rod is improved and the structural strength is enhanced; and in addition, by aging treatment, residual stress to the connecting rod caused by sintering and forging is eliminated. The powder metallurgy connecting rod has the characteristics of high strength and no residual stress and the advantages of long service life and improvement on the quality of a product.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy technology, in particular to a powder metallurgy automobile engine connecting rod and a preparation method thereof. Background technique [0002] Powder metallurgy is an industrial 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 produce metal materials, composite materials and various types of products. At present, powder metallurgy Technology has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industries, and has become one of the most dynamic branches of new material science. Powder metallurgy technology has significant energy saving, With a series of advantages such as material saving, excellent performance, high product precision and good stability, it is very suitable for mass production. In addition, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C7/02B22F3/17B22F3/24
CPCF16C7/02B22F3/17B22F3/24B22F2003/248
Inventor 陈田非
Owner ANHUI AOTAI POWDER METALLURGY
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