Automobile crankshaft thickened hub multi-wedge wheel forming technique and tool

Abstract

The invention discloses an automobile crankshaft thickened hub multi-wedge wheel forming technique and tool. The whole machining process is completed through blanking and punching, shovel spinning formation, stamping formation of arcs and rotary tooth thickening sequentially. A rotary tooth thickening tool for rotary tooth thickening comprises an upper die, a lower die, a positioning core, a cover plate, an unloading plate, an arc rotary wheel, a first pre-spinning wheel, a second pre-spinning wheel and a final formation rotary wheel, wherein the arc rotary wheel, the first pre-spinning wheel, the second pre-spinning wheel and the final formation rotary wheel are used in cooperation sequentially. The automobile crankshaft thickened hub multi-wedge wheel forming technique and tool have the advantages that the machining process is stable, the spinning effect is good, material folding, layering and cracking are not prone to occurring in the forming process, the purpose of integrated formation is achieved, finished products are more stable and firm in structure, and meanwhile the service life is prolonged; and the adopted rotary tooth thickening tool is simple in structure, an obtained pulley groove is smooth in surface and high in precision, the service life of matching belts is prolonged, and meanwhile the production efficiency of products is improved.

Description

technical field [0001] The invention relates to the technical field of engine transmission parts processing, in particular to a forming process and tooling for thickened hub poly-ribbed wheels of automobile crankshafts. Background technique [0002] The shock absorbing pulley is an important part of the engine. Compared with the general pulley, the shock absorbing pulley needs more technology combination. It not only has the performance of the general pulley, but also needs to achieve the function of shock absorption and noise avoidance. , this technology can increase the stability and noise reduction of various vehicles during operation. [0003] The shock-absorbing pulley includes an inner wheel, an outer wheel and a rubber ring interlayer. The inner wheel is connected to the crank wheel by a keyway, and the outer wheel has wedge-shaped teeth for connecting the belt. There is a shock-absorbing rubber ring interlayer between the inner and outer wheels, and the outer wheel i...

AI Technical Summary

Problems solved by technology

[0003] The shock-absorbing pulley includes an inner wheel, an outer wheel and a rubber ring interlayer. The inner wheel is connected to the crank wheel by a keyway, and the outer wheel has wedge-shaped teeth for connecting the belt. There is a shock-absorbing rubber ring interlayer between the inner and outer wheels, and the outer wheel is thick-walled. The steel pipe turning process is completed, its disadvantages are long processing time, high material consumption, and the multi-wedge groove is not smooth, which leads to short belt life, and the traditional processing technology is processed by turning forgings or casting blanks, and the material and processing costs are high.

[0004] The patent with the application number 201410624830.1 is a patent applied by the applicant in 2014, but in the actual production process, due to the lack of positioning cores, there will be some offset deformation during the processing process, which will affect the quality of the product

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