Manufacturing method for large driving wheel forged pieces

Abstract

A manufacturing method for large driving wheel forged pieces includes the first step of blank forming including blanking, heating and blank forming, the second step of hammer forging including heating and hammer forging, the third step of trimming, punching and shaping, the fourth step of thermal treatment including suspended hardening and tempering, hardness detection and metallography detection, the fifth step of finishing including cleaning and grinding, and the sixth step of inspection including fluorescent magnetic particle flaw detection, dimension inspection and appearance inspection. The large driving wheels are forced integrally in a hammer forging mode, so that the driving wheels are good in strength; an annular intermediate billet is used, and the utilization rate of materials is high; all teeth of the driving wheels are cut at a time in the step of trimming, punching and shaping, and are of good consistency; the driving wheels are subjected to suspended hardening and tempering and thermal treatment, so that deformation caused in the thermal treatment process is effectively reduced; by adoption of integral forging, the production process is simple, the production cycle is short, the production cost is low relatively, reliability is good, and quality is stable.

Description

technical field [0001] The invention belongs to the field of forging technology, and relates to a manufacturing method of a large driving wheel forging. Background technique [0002] Drive wheels, also called sprockets, are widely used in construction machinery industry. The large drive wheel weighs 30-100 kg and has a diameter of 500-900 mm. figure 1 , Two driving wheels form a group, and the crawler construction machinery relies on the tooth A of the driving wheel and the pin shaft meshing of the chain rail link to transmit motion and travel. The production and operation conditions of driving wheels are complex and harsh, and they often bear large and uneven impact loads during work. And because other parts except the inner hole are no longer machined, the user has higher requirements for the strength, dimensional accuracy and shape of the driving wheel: the contour tolerance of all teeth A is ± 3 mm, and it is not allowed to affect the use after trimming The residual f...

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic manufacturing process of large-scale driving wheels is mostly casting or segmental forging process: the disadvantages of casting process to produce driving wheels are relatively poor strength, low service life, relatively long manufacturing cycle, and relatively poor quality; segmental forging The disadvantage of process production driving wheel is that the manufacturing cost is high, because the connection methods of bolts and welding are used for each section, the process is complicated and the reliability is poor, the service life is low, the quality is unstable, and the material utilization rate is low, so it is not suitable for mass production.

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