Hydro-bugling drive axle housing axle head forming process and mould

Abstract

The invention discloses a hydro-bugling drive axle housing axle head forming process and a mould. The process comprises the steps of carrying out reducing on an axle end for four times and carrying out heat pushing and pressing on the axle end for three times. The mould comprises an upper mould plate, a lower mould plate, a left reducing female die module, a right reducing female die module, a middle part clamping module piece, an end part clamping module piece and the like. The upper mould plate drives a middle-upper clamping die and upper end clamping dies I and II to move downwards; the middle-upper clamping die, the upper end clamping dies I and II, a middle-lower clamping die and lower end clamping dies I and II are used for respectively clamping a middle part and end parts of a pipefitting; by combining with sizing segments of reducing (pushing and pressing) female dies I and II, the pipe fitting is jointly guaranteed to be formed without being creased or losing stability; and the left and right reducing (pushing and pressing) female die modules move face to face, so that reducing or pushing and pressing of the pipe fitting is realized, and an axle head with a conical surface and a perpendicular circular bead is formed. According to the hydro-bugling drive axle housing axle head forming process and the mould provided by the invention, the axle head is formed on the basisof a hydro-bugling drive axle housing body, and no half-axle sleeve tube needs to be welded, so that an axle housing is free of a welded joint, the fatigue strength of the axle housing is improved, and the mass is reduced; and the axle head forming mould is matched with earlier-stage axle housing body forming equipment, so that the forming cost of the axle head is greatly saved.

Description

[0001] Technical field [0002] The invention relates to a forming process and a mold for an axle head of an axle housing, in particular to a forming process and a mold for a hydraulic bulging drive axle housing axle head. Background technique [0003] The axle housing is an important load-bearing and force-transmitting part on a rear-drive vehicle, and generally consists of a middle axle pack, axle tubes at both ends, and axle heads (see figure 1 ). The shaft head (or half shaft sleeve) mainly supports the rotation of the wheel hub and bears the dynamic vertical load and bending moment. Compared with the axle housing body (that is, the middle axle package plus the axle tubes at both ends), it requires higher fatigue resistance. Considering material cost and process factors, traditionally, the shaft head and the body are formed in multiple parts. After the half shaft sleeve is formed by die forging, extrusion, hot extrusion or roll forging, it is then combined with casting, s...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem that the existing hydraulic bulging axle housing still needs to weld the half shaft sleeve, the present invention provides a hydraulic bulging drive axle housing axle head forming process and mold. Reduced diameter pre-formed large cone surface, and then through three times of warm pushing to achieve axial feeding, the large cone surface is gradually formed into a vertical shoulder

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