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Powder metallurgy internal hilical gear, and its manufacturing method and die using same method

A technology of internal helical gear and powder metallurgy, which is applied in the field of powder metallurgy internal helical gear and its manufacturing and implementation of the mold, can solve the problems of increasing raw material loss, difficulty in withdrawing the mandrel, and high manufacturing cost, so as to save raw materials and manufacture The effect of low cost and compact mold structure

Inactive Publication Date: 2004-09-15
JIANGSU YINGQIU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of internal helical gear cannot be processed in China by stamping and rolling.
When the internal helical gear is pressed by the general powder metallurgy method, the mandrel is difficult to withdraw, especially if the helix angle is large, the compact will be damaged
Even if the processed internal helical gear has low precision, it is necessary to use the electrode corresponding to the internal helical gear to EDM the internal helical gear. This method has a slow processing speed, a long processing cycle, and a machining allowance is required. , increase the loss of raw materials, and the manufacturing cost is expensive

Method used

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  • Powder metallurgy internal hilical gear, and its manufacturing method and die using same method
  • Powder metallurgy internal hilical gear, and its manufacturing method and die using same method
  • Powder metallurgy internal hilical gear, and its manufacturing method and die using same method

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Embodiment Construction

[0017] Attached below Figure 1-2 Embodiments of the present invention will be further described in detail.

[0018] The sintering treatment is not to completely melt the material powder into an alloy. The sintering treatment is to heat-treat the formed body of the metal or alloy powder under pressure at a temperature below the melting point of the main element, and use the solid solution phenomenon produced by the combination of powders to sinter. into.

[0019] The technical scheme of the powder metallurgy internal helical gear of the present invention is that, by weight percentage, the composition of the above-mentioned internal helical gear contains alloy elements Cu 1-3%, Ni 1-3%, Mo 0.1-1%, and the rest is Fe and unavoidable ingredients.

[0020] figure 1 As shown, in the batching and mixing process A, the raw material powder composed according to the proportion of pre-alloyed steel powder containing Cu 1-3%, Ni 1-3%, Mo 0.1-1%, and the rest is Fe The mixture is a bi...

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Abstract

The invention discloses a powder metallurgical internal inclined gear, according to weight percent, containing elements Cu 1-3%, Ni 1-3%, Mo 0.1-1%, and the rest Fe and unavoidable component, where its spiral angle is not greater than 35 degrees, its pressure angle is 5-25 degrees, and its mode is 0.5-2.5 degrees. It mixes the alloy powder of Cu, Ni and Mo to make press molding, firing and shaping so as to make it. Its making mould is top, bottom and middle moulds and core stick. It gears stably and accurately, has small friction coefficient and low mechanical noise. It adopts special designed mould, presses by mould core's rotary ascending or descending along screw, which converts the rotary pressing into axial pressing, can press internal inclined gears of various spiral angles.

Description

technical field [0001] The present invention relates to a kind of special-shaped product manufactured by metal powder and its manufacturing method and equipment, in particular, it relates to a powder metallurgy manufacturing internal helical gear, its manufacturing method and special equipment. technical background [0002] At present, gear transmission is widely used in various machines, automobiles, clocks, instruments, electrical appliances and other industries. It has stable transmission ratio, accurate and reliable transmission motion, high transmission efficiency, especially internal helical gear transmission, its advantages are more obvious, except In addition to the characteristics of general gear transmission, it also has the characteristics of compact structure. This internal helical gear adopts stamping and rolling domestic still can't process. When the internal helical gear is pressed by the general powder metallurgy method, the mandrel is difficult to withdraw,...

Claims

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Application Information

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IPC IPC(8): B22F5/08C22C38/16
Inventor 陈秀发
Owner JIANGSU YINGQIU GRP CO LTD
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