Powder metallurgy start chainwheel and gear

A powder metallurgy and starting chain technology, applied in the field of gears and powder metallurgy starting sprockets, can solve the problems of waste, poor precision and high scrap rate, and achieve the effects of reducing manpower and material resources, small precision errors and saving materials

Inactive Publication Date: 2012-03-21
ZAOZHUANG RUNYUAN POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The efficiency is low, and it cannot meet the mass production of customers at all, and be

Method used

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  • Powder metallurgy start chainwheel and gear

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[0039] Example

[0040] The raw material weight ratio of the present invention:

[0041]

[0042] Manufacturing method: the powder metallurgy process is used for one-time pressing and forming.

[0043] Process flow: forming, sintering, oil immersion, machining, vibration grinding, cleaning, steam treatment, oil immersion, packaging.

[0044] Forming parameters: Machine: 315T hydraulic press

[0045] Pressure: about 250T

[0046] Forming method: female mold floating

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Abstract

The invention discloses a powder metallurgy start chainwheel and gear. The chainwheel and gear are pressed and formed at a time by the powder metallurgy process, and comprise the following raw materials in percentage by weight: 95.5-98% of iron, 0.3-1.2% of carbon, 0.7-2% of copper, 0.1-0.5% of manganese sulfide and 0.3-1.2% of zinc stearate. In the invention, the traditional manufacturing process is replaced by the powder metallurgy technology so as to save cost for the traditional enterprises. The powder metallurgy has high degree of mechanization, saves materials, lowers cost, reduces manpower and material resources and improves efficiency and tooth profile accuracy.

Description

technical field [0001] The invention relates to a powder metallurgy structural part, in particular to a powder metallurgy starting sprocket and a gear. Background technique [0002] The existing starting sprocket and gear are originally made of S45C steel, and then the tooth profile of the sprocket is milled, and the splines in the inner hole are processed by wire drawing. This method wastes material, manpower and material resources, has low efficiency, poor precision and high cost. [0003] For example: the blanking weight of the steel part is 1.47kg, and the finished product is only 0.23kg, which means 1.24kg is wasted. The unit price of materials is ￥6 / kg, and this alone is a waste of ￥7.44 / kg. [0004] Manual milling can only mill about 50 pieces per day, and about 300 pieces of wire-drawn splines. The efficiency is low, and it cannot meet the mass production of customers at all, and because it is manual operation, it leads to poor precision, high scrap rate, and wast...

Claims

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Application Information

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IPC IPC(8): B22F5/08B22F5/10B22F3/16
Inventor 秦洪林
Owner ZAOZHUANG RUNYUAN POWDER METALLURGY
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