Radial forging and gradual-increment forming method for large-tooth-height thread element

Abstract

The invention discloses a radial forging and gradual-increment forming method for a large-tooth-height thread element. According to the method, a hammerhead is gradually increased by a radial compression amount, the hammerhead is provided with a thread-shaped section, the thread shape comprises a gradual-increment-variable thread-shaped section and a gradual-increment-invariable thread-shaped section, a plurality of the hammerheads with the gradual-increment-variable thread-shaped sections are used for synchronously forging, and a workpiece is rotated and axially fed simultaneously, thus reducing a forming force, reducing forging defects, and improving surface accuracy and strength; isovolumetric forging is carried out to realize near-net forming, thus increasing material utilization rate, and shortening production period; forming manufacturing for thread components such as lead screws and screw rods with high performances, large diameters and high tooth heights can be realized.

Description

technical field [0001] The invention belongs to the technical field of advanced material forming, and in particular relates to a method for radially forging and incrementally forming large-tooth-height screw parts. Background technique [0002] Large-diameter, large-tooth-height threaded parts such as lead screws and screws are important functional components in the machinery industry. With the rapid development of my country's national economy, the demand for such large-diameter, large-tooth-height threaded parts is increasing, and the performance requirements are increasingly demanding. Traditional cutting-based processing methods are difficult to meet the high-efficiency, material-saving and high-performance processing and manufacturing of such parts. [0003] Radial forging is a multi-directional local loading plastic forming technology, which is more efficient and material-saving than cutting processing, and plastic deformation can effectively increase the surface stre...

AI Technical Summary

Problems solved by technology

The patent application number is 201410012125.6 discloses a method of radial forging forming screw, however, the method of forming threaded parts with large tooth height will cause large radial deformation, resulting in high forming load, poor surface quality and wear of the hammer head exacerbated

Based on the radial forging forming screw method disclosed in the patent application number 201410012125.6, multi-pass radial forging can be used to reduce the amount of deformation in each pass, but the movement accuracy of rotary feed is required to be improved, and the multiple reciprocating rotation Feed movement, manipulators at both ends clamp and loosen multiple times, the accumulation of errors will easily lead to the phenomenon of wrong teeth and disordered teeth of forged threads

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