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Cold-forging precise forming technique of gear sleeve

A technology of precision forming and gear sleeves, which is applied in the cold forging precision forming process of gear sleeves and the field of cold forging precision forming technology of gear sleeves. It can solve the problems of long gear sleeve forming process, low product qualification rate, and poor forming efficiency. Shorten the processing process, improve the overall quality, and reduce the effect of metal flow resistance

Inactive Publication Date: 2010-06-16
SHANGHAI DONGFU COLD FORGING MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a cold forging precision forming process of gear sleeves, which solves the technical problems of the existing gear sleeves such as long forming process, high material consumption, low product qualification rate, and poor forming efficiency.

Method used

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  • Cold-forging precise forming technique of gear sleeve
  • Cold-forging precise forming technique of gear sleeve
  • Cold-forging precise forming technique of gear sleeve

Examples

Experimental program
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Effect test

Embodiment

[0022] Such as image 3 As shown, it is the cold forging process flow chart, and the cold forging precision forming process of a tooth sleeve is:

[0023] The first step is to blank the alloy steel pipe billet with a circular saw machine, and the weight error between the blank blank and the gear sleeve is ±0.5 grams;

[0024] The second step is to anneal the blanking of the steel pipe billet in a well-type furnace at 850 ° C for 6 hours, and cool it to 300 ° C with the furnace;

[0025] The third step is to use the phosphorus saponification line to carry out phosphating and saponification treatment on the blanking of the annealed steel pipe billet according to the conventional process to form a surface lubricating layer. The phosphating temperature is 80°C and the time is 20 minutes; the saponification temperature is 60°C. The time is 10 minutes;

[0026] The fourth step is to use high-strength die steel to manufacture pre-forming dies and closed forging dies;

[0027] The ...

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Abstract

The invention relates to a cold forging technology for a gear sleeve, and the cold forging technology is characterized in that a technology of cold forging and precision near net forming and a new technology of block split flow forging are adopted, an internal gear hole and the exterior are formed in one step by compound cold forging, subsequent processing is not necessary, the precision of the gear form is above Grade Seven, a volume split flow space is arranged between the external diameter of the gear sleeve and a concave die, the metal flow resistance is reduced, and the unit extruding force carried by the die is lowered; alloy steel tube blank is adopted for block forging, and no waste is formed by cold forging; the utilization ratio of materials achieves more than 90%, the position deviation of the gear form is not more than 0.03mm, and the production efficiency is improved greatly; after the inspection of the product, various technical parameters of the formed product achieve the technical standard of the like products of Toyota Motor Corporation of Japan, and the forming technology is superior to that of Japan, and reaches the international advanced level.

Description

technical field [0001] The invention relates to a cold forging precision forming process of a gear sleeve, in particular to a cold forging precision forming process of a gear sleeve used in a steering assembly of a car, and belongs to the technical field of cold forging precision forming technology. Background technique [0002] At present, gear sleeves are to be processed, such as figure 1 , 2 As shown, the gear sleeve is composed of a stepped hole, a three-way flattened cylindrical large end C and cylindrical small end D, as well as an inner taper hole B and an inner gear hole A. The traditional processing method is to cut the shape and inner hole , use a toothed broach to broach and form the inner tooth. If the general forging method is used, only a hollow cylinder with a large and small end can be formed. The flattened shape and inner hole still need to be cut and broached to form the tooth hole. The disadvantages of cutting It is a long gear sleeve forming process, hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/30B21J13/02
Inventor 廖世绍廖泽寰廖泽亮
Owner SHANGHAI DONGFU COLD FORGING MFG
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