Automobile semiaxle wedge cross-rolling precision shaping method

Abstract

The invention provides a wedge cross-rolling multi-wedge precisely-molding method of auto half shaft, installing multi-wedge mould with 2-6 wedge pairs in the wedge cross roller to roll the half shaft, heating circular stick to 1000-2000 deg.C, inputting two parallel-rotating multi-wedge moulds with 2-6 wedge pairs through axial feeding device to roll. The mould parameters: molding angle, alpha=18-34 degrees, stretching angle, beta=4-12 degrees. It can roll the half shaft at the same time.

Description

technical field

[0001] The invention belongs to the technical field of plastic forming of shaft parts, and particularly provides a multi-wedge precision forming method for automobile semi-axle cross wedge rolling, which is suitable for rolling and forming of large-scale long shaft parts. Background technique

[0002] The car half shaft is one of the key parts of the car, which belongs to the large-scale long shaft parts (greater than 900mm). At present, there are two main methods for producing half shafts at home and abroad:

[0003] 1) Forging into shape, its production efficiency is 0.3 to 0.5 pieces per minute, and the material utilization rate is about 65%;

[0004] 2) Cross-wedge rolling and single-wedge rolling to form, its production efficiency is 2 to 6 pieces per minute, and the material utilization rate is 78 to 82%.

[0005] Cross wedge rolling and single wedge rolling forming and forging, although the production efficiency and material utilization rate have bee...

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