Automobile power steering pump powder metallurgy inner and outer rotor formula and preparation technology

A technology of power steering pump and powder metallurgy, which is applied in the field of powder metallurgy inner and outer rotor formula and manufacturing process of automobile power steering pump, which can solve the problems of large surface roughness, short service life, and many processes in machining, and achieve consistency in mass production Good, improve the service life, reduce the effect of manufacturing cost

Active Publication Date: 2014-06-04
ANHUI HENGJUN POWDER METALLURGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the composition of the steel is relatively fixed, the wear resistance is poor, and it is relatively easy to wear, and the head gap becomes larger, which will cause the direction to be hit hard, which seriously affects driving safety.
It also leads to a short service life
Secondly, the material utilization rate is low, and only about 60% of the r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below through specific examples, but the present invention is not limited by the following examples.

[0018] (1) stir powder

[0019] According to the specific properties required by the product, various metal and non-metal elements are purposely added to make the finished product achieve the expected mechanical properties. This product requires high dimensional accuracy, good toughness, good dimensional stability and strong wear resistance. The formula we use is: 95% atomized iron powder, 1% colloidal graphite, 1% electrolytic copper, 1% nickel powder, 0.5% molybdenum powder, 0.5% manganese sulfide, 0.4% sulfur, 0.6% micronized wax and 20ml / 100 kg of spindle oil.

[0020] Accurately weigh the raw materials and pour them into a special powder mixer to stir for 30-60 minutes. After pouring out and cooling for 1 hour, the next process can be carried out.

[0021] (2) Compression molding

[0022] Install the d...

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PUM

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Abstract

The invention discloses an automobile power steering pump powder metallurgy inner and outer rotor formula and preparation technology. The formula comprises the following components, by weight percentage, 92-95% of atomized iron powder, 0.6-1.2% of colloidal graphite, 1-5% of electrolytic copper, 0.5-3% of nickel powder, 0.5-3% of molybdenum powder, 0.1-0.6% of manganese sulfide, 0.1-0.6% of sulfur, 0.3-0.7% of micronized waxes, and 5-30ml/100kg of spindle oil. The preparation technology comprises the following steps of ingredient preparing, powder mixing, compression molding, sintering and alloying, shaping and correcting, machining, steam treating and the like. Utilization ratio of materials is improved effectively, the surface roughness reaches 0.8-1.6Mum, the service life, accuracy class, safety performance of the power steering pump are improved effectively, and production cost is reduced.

Description

technical field [0001] The invention relates to a new formula of inner and outer rotors of an automobile power steering pump and a manufacturing process. Background technique [0002] The inner and outer rotors of the current automobile power steering pump are made of steel (45# steel, 40Cr, etc.) through machining. First of all, the composition of the steel is relatively fixed, the wear resistance is poor, and it is relatively easy to wear, and the head gap becomes larger, which leads to the direction of being unable to hit, which seriously affects driving safety. And it will also lead to a short service life. Secondly, the material utilization rate is low, and only about 60% of the raw materials are left after processing; third, the processing efficiency is low, only about 100 pieces per shift; fourth, the machining surface roughness is large, generally only reaching 3.2 μm; fifth , The processing size accuracy is low, the error is 0.03-0.05mm; Sixth, there are many proc...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/16C22C38/60
Inventor 丁邦顺
Owner ANHUI HENGJUN POWDER METALLURGY TECH
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