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Powder-metallurgy oil-pump adjusting gear ring and manufacturing method thereof

A technology of powder metallurgy and gear adjustment, applied in the field of powder metallurgy, can solve the problems of high manufacturing cost, insufficient ring gear strength, waste of materials, etc., and achieve the effect of reducing production cost, simplifying equipment and improving production efficiency

Inactive Publication Date: 2014-01-29
WUHU HONGKUN AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The currently used oil pump nozzle adjustment ring gears are all made of cast steel, forged steel or round steel by machining. This kind of adjustment ring gear has high manufacturing cost and causes waste of materials.
Another method is to make it from metal powder materials, but the strength of this ring gear has not been enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] specific implementation plan

[0017] The present invention will be described in detail below through specific examples.

[0018] A powder metallurgy oil pump regulating ring gear, made of the following raw materials in parts by weight (kg): iron powder 70, copper powder 2, zinc stearate 0.5, engine oil 3, graphite 1, 2, cobalt 4, nickel 9, tin 1. Graphitized tungsten 2. Additive 2;

[0019] The auxiliary agent is made of the following raw materials in parts by weight (kg): iron powder 30, bamboo charcoal 3, citric acid 2, nano-titanium dioxide 1, silane coupling agent KH550 1, ferric oxide 3, potassium dihydrogen phosphate 1 , zinc stearate 2, N220 carbon black 1, methyltrimethoxysilane 1; the preparation method is to mix iron powder, bamboo charcoal, ferric oxide, potassium dihydrogen phosphate, and N220 carbon black, and grind them into 200-300 mesh powder, then add methyltrimethoxysilane and mix evenly, press it into a billet at 10-15Mpa, then send it to 920-950°C...

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Abstract

The invention discloses a powder-metallurgy oil-pump adjusting gear ring. The powder-metallurgy oil-pump adjusting gear ring is characterized by being composed of, by weight, 70-72 parts of iron powder, 2-3 parts of copper powder, 0.5-1 part of zinc stearate, 3-4 parts of machine oil, 1-2 or 2-3 parts of graphite, 4-5 parts of cobalt, 9-10 parts of nickel, 1-2 parts of tin, 2-3 parts of graphitized tungsten and 2-3 parts of auxiliary agents. The graphite is added to raw materials of the powder-metallurgy oil-pump adjusting gear ring, so that abrasion resistance and lubricity of the adjusting gear ring are enhanced, the structure is compact, the microstructure is good, very few holes are formed, and structural rigidity, hardness, fatigue resistance and tensile strength are excellent; besides, because mould pressing is adopted, equipment is simplified, production cost is reduced, and production efficiency is improved.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy oil pump regulating ring gear and a preparation method thereof. Background technique [0002] Currently used oil pump nozzle adjustment ring gears are all made of cast steel, forged steel or round steel by machining. This adjustment ring gear has a higher manufacturing cost and causes waste of materials. Another method is to manufacture from metal powder material, but the strength of this ring gear has not been enough. [0003] 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 indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/16B22F5/08C22C38/16
Inventor 黄浩
Owner WUHU HONGKUN AUTO PARTS
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