Wedge cross-rolling two cycle roll forming method for automobile half-shaft blank

Abstract

A technology for forming the self-axle blank of car by using wedge dies to roll it by two-turns includes such steps as heating a circular blank to 950-1200 deg.C, feeding it between two die sets with at least one pair of internal wedges and one pair of external wedges, rotating the die sets by one turn while rolling it by internal wedges, and rotating the die sets by another turn while rolling it by external wedges.

Description

technical field [0001] The invention belongs to the technical field of metal plastic forming, and in particular provides a method for forming an automobile semi-shaft blank by cross-wedge rolling with two turns, which is suitable for the cross-wedge rolling production of the automobile half-shaft blank. technical background [0002] The car half shaft is an important power transmission part of the car. It not only transmits the torque from the car engine, but also bears the vertical force, lateral force, and longitudinal force formed by the traction and braking forces acting on the wheels. Therefore, the automobile half shaft is an important bearing part in the automobile transmission system, and it is also one of the vulnerable parts on the automobile. [0003] Cross wedge rolling can be directly rolled to produce shaft parts, and can also be used for die forging or other forming processes to make blanks, especially for forgings with large changes in axial volume distributi...

AI Technical Summary

Problems solved by technology

[0008] However, since the automobile half shaft is a large long shaft part, the cross wedge rolling process is used to produce the automobile half shaft blank as shown in Figure 1. The diameter of the mold needs to be more than 1400mm, and large cross wedge rolling equipment is required, which requires large equipment investment and high mold cost.

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