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Manufacturing method of high-strength sintered umbrella gear

A manufacturing method and technology of bevel gears, applied in the field of powder metallurgy manufacturing technology, can solve the problems of high price and inability to reduce gearboxes, achieve high strength and impact resistance, and meet the effects of mechanical performance requirements

Inactive Publication Date: 2005-12-07
SAIC MOTOR
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Problems solved by technology

Due to the factors of imported products, their prices are relatively high, and the cost of gearboxes and even lawn mowers cannot be reduced

Method used

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Embodiment Construction

[0015] The manufacturing method of the bevel gear of the present invention will be described in detail below by means of an embodiment.

[0016] The manufacture method of bevel gear of the present invention comprises the steps:

[0017] The first is the raw material preparation step. In the present invention, the main raw material for manufacturing bevel gears is iron-molybdenum pre-alloyed powder, and the rest are auxiliary materials: nickel powder and graphite powder, the content of nickel powder is 2-3%, and the content of graphite powder is 0.4-0.8%. In addition, zinc stearate is also included as a lubricant in an amount of 0.8%. Of course, the remaining part is the main material, that is, the base powder, and the base powder iron-molybdenum pre-alloy contains 0.5-1% of molybdenum metal powder.

[0018] Then, in the mixing step, the above-mentioned raw materials are mixed;

[0019] In the pressing step, the raw materials that have passed the above mixing step are placed...

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Abstract

The invention provides a method for making angular wheel. It comprises the following steps: preparing raw materials include ferromolybdenum powder, nickel powder, graphite powder and zinc stearate, wherein ferromolybdenum powder is basic powder and contains molybdenum 0.5-1úÑ; the content of nickel powder is 2-3úÑ, the content of graphite powder is 0.4-0.8úÑ, the content of zinc stearate is 0.8úÑ; mixing raw materials; putting the mixed raw materials into mold and pressing it to form pressed compact with the density above 7.15g / cm.3.; putting pressed compact on high temperature net and heating it with the temperature between 650 deg. and 750 deg., then agglomerating it with the temperature between 1110 deg. and 1120 deg.; annealing pressed compact with the temperature at 840í‚20 deg.; drawing temper it with the temperature at160í‚20 deg..

Description

technical field [0001] The invention relates to a powder metallurgy manufacturing process, in particular to a manufacturing method of a high-strength powder metallurgy bevel gear. Background technique [0002] Bevel gears are conventional gear parts that can be used in various gearboxes. At present, the bevel gear train used in the gearbox of the lawnmower is imported from abroad, and the foreign manufacturer only provides the product, but does not provide its manufacturing method. Due to the factors of imported products, their prices are relatively high, and the cost of gearboxes and even lawn mowers cannot be reduced. [0003] In order to reduce the cost, we developed its manufacturing method according to the performance requirements of the gearbox bevel gear, and finally made the bevel gear localized. Contents of the invention [0004] Therefore, the object of the present invention is to provide a kind of manufacturing method of bevel gear of lawn mower gearbox, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F5/08
Inventor 丁彬蒋叶琴
Owner SAIC MOTOR
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