Gear shaft forming method and die adopted by same

Abstract

The invention aims at the defects of low processing efficiency and low machining precision when a gear shaft is upset in the prior art, and provides a gear shaft forming method and die adopted by the same. The die comprises a stamping die and a main die, wherein a stamping die cavity matched with the outer surface shape of a gear of the gear shaft is formed in the stamping die; a main die cavity matched with the outer surfaces of a shaft lever part and a spline part of the gear shaft is formed in the main die; the upper end of the stamping die cavity is coaxially communicated with a front bar beating hole; and the lower end of the main die cavity is coaxially communicated with a rear bar beating hole. During the upsetting, a reverse strong beam is used for forming the gear in the stamping die cavity and forming the spline and the shaft lever in the main die cavity. With the adoption of the method and the die, not only can the gear teeth and the spline be formed once, but also the obtained gear shaft has high grades in straightness and precision, and the production efficiency is also improved.

Description

technical field

[0001] The invention relates to a forming method of a gear shaft and a used forming die, in particular to a cold heading forming method of a gear shaft and a used die. Background technique

[0002] The existing gear shaft processing method needs to go through the following procedures: Entrust the manufacturer to cold pier processing or turning into blanks without teeth; Then use hydraulic equipment or punch press cold extrusion molding. The above-mentioned processing method cannot be automated and there are many processes, and the coaxiality of each part of the gear shaft cannot be guaranteed, and bumps, scratches, etc. are easy to occur due to movement during multiple processing processes, making the accuracy of the gear shaft so bad that it is destroyed; Simultaneously because need manual transmission in processing, production efficiency is low, labor intensity is big, output is little and production cost is high. Furthermore, by adopting the above met...

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