Fine forging forming method of spiral bevel gears

A manufacturing method and gear precision technology, applied in the direction of manufacturing tools, forging/pressing/hammering machinery, wheels, etc., can solve the problems of short mold life, arc tooth damage, arc tooth profile damage, etc., to prolong the service life, Effect of reducing radial flow and improving life

Inactive Publication Date: 2011-11-16
CHONGQING CHUANGJING WARM FORGING FORMING
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Problems solved by technology

[0005] The present invention aims at the fact that when the forging method is used to form the tooth shape of the spiral bevel gear in the prior art, it is easy to destroy the spiral tooth shape on the mold, resu

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  • Fine forging forming method of spiral bevel gears
  • Fine forging forming method of spiral bevel gears
  • Fine forging forming method of spiral bevel gears

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Embodiment Construction

[0030] The precision forging and forming manufacturing method of spiral bevel gear of the present invention is characterized in that comprising the following steps:

[0031] (1) Prepare raw materials according to the process design requirements, grind the surface of the raw materials, inspect the cracks, and then saw them into material sections, and remove the material sections that do not meet the requirements; the grinding surface, flaw detection inspection, etc., all adopt the existing technology, here no further description;

[0032] (2) Heat the material section to 1150-1180°C, specifically, it can be heated in an intermediate frequency induction furnace;

[0033] (3) Pier the material section on the press, punch holes, and then expand the ring through the ring rolling machine to obtain a ring-shaped blank;

[0034] (4) Set the ring-shaped blank on a multi-station hot die forging press, and pre-forge it in the pre-forging die to obtain a pre-forging blank with a pr...

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Abstract

The invention discloses a fine forging forming method of spiral bevel gears, comprising the steps of: preparing for a material bar satisfying technical design requirements; heating the material bar to 1150-1180 DEG C; upsetting and punching as well as ring-enlarging the material bar on a press; pre-forging and forming in a pre-forging die on a multistage hot die forging press to obtain a pre-forging blank with pre-forging teeth, wherein the curved tooth spiral angle beta of the pre-forging die is 8-12 degrees smaller than that of a finish forging die; arranging the pre-forging blank on the multistage hot die forging press, and finish-forging and forming in the finish forging die; after a spheroidizing annealing treatment, cleaning the surface by sand-blasting, and phosphating and saponifying the surface; and finishing tooth profiles at normal temperature in a hydraulic machine. The method provided by the invention adopts a gradually forming manner consisting of pre-forging first and finish forging at last, therefore, the radial flow of the blank is greatly reduced, the side pressure of the blank to the tooth profile die cavity is reduced, the tooth profiles of the curved teeth of the forging die are prevented from being damaged, the service life of the forging die is prolonged, the production efficiency is improved, and the production cost can be efficiently reduced.

Description

technical field [0001] The invention relates to a manufacturing method of a spiral bevel gear used in the fields of automobiles and engineering machinery, in particular to a manufacturing method of a spiral bevel gear by precision forging. [0002] technical background [0003] Spiral bevel gears are widely used in automobiles, engineering machinery and other fields. The traditional processing method uses a special spiral gear milling machine to process the tooth shape, which has low efficiency and low material utilization, resulting in high processing costs for spiral bevel gears, and the processing accuracy of spiral bevel gears is difficult to meet the needs of power transmission. The quality stability between different batches of products is poor. Theoretically, the forging method can be used to form the tooth shape of the spiral bevel gear. There are some brief introductions in related academic research, but when doing forging experiments, it is found that a big probl...

Claims

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Application Information

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IPC IPC(8): B21K1/30B21J5/02B21J13/02
Inventor 胡斌高凤强敬勇冯杰
Owner CHONGQING CHUANGJING WARM FORGING FORMING
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