Forming Technology and Die of Axle Head of Hydraulic Bulging Drive Axle Housing

A technology of hydraulic bulging and forming process, which is used in forming tools, manufacturing tools, metal processing equipment and other directions to achieve the effect of saving forming costs

Active Publication Date: 2021-10-29
YANSHAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Forming Technology and Die of Axle Head of Hydraulic Bulging Drive Axle Housing
  • Forming Technology and Die of Axle Head of Hydraulic Bulging Drive Axle Housing
  • Forming Technology and Die of Axle Head of Hydraulic Bulging Drive Axle Housing

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Experimental program
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Embodiment

[0039] figure 1 It is a schematic diagram and key dimensions of the hydraulic bulging drive axle housing of an electric vehicle: φ d0 =295mm,t 0 =10mm, φ d3 =125mm, φ d2 =115mm, φ d1 =88mm, t 1 =19mm and l 1 =668mm.

[0040] The invention provides a hydraulic bulging drive axle head forming process, that is, the preformed pipe fittings are obtained through the hydraulic bulging of the axle housing body (see figure 2 , l 2 ≥380mm) on the basis of shaft head forming, including three times of shaft end diameter reduction and four times of shaft end warm pushing, the specific process is as follows:

[0041] ① On the hydraulic machine, clamp the shaft tubes at both ends of the pipe for the first shaft end reduction, and the distance from the outer end surface of the clamping mold to the symmetrical centerline of the pipe is l j =580mm (see image 3 ), the outer diameter of the shaft end is reduced to φ after the diameter is reduced d2 =115mm, the distance between the in...

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Abstract

The invention discloses a hydraulic bulging driving axle head forming process and mold. The process includes four shaft end reductions and three shaft end warm pushes. The mold includes an upper template, a lower template, left and right reducing die assemblies, middle and end clamping mold assemblies, etc. The upper template drives the middle and upper clamping molds and the upper clamping molds I and II to move downward, and The middle and lower clamping dies and the lower clamping dies Ⅰ and Ⅱ respectively clamp the middle and end of the pipe fittings, together with the sizing sections of the reducing (push) dies Ⅰ and Ⅱ, jointly ensure that the pipe fittings are formed without wrinkling and instability. Said that the left and right reducing (pushing) die components move towards each other to realize the reducing or pushing of the pipe fittings, forming the shaft head with a tapered surface and a vertical shoulder. The invention forms the shaft head on the basis of the hydraulic bulging axle housing body without welding the half shaft casing, truly realizes no weld seam of the axle housing, improves the fatigue strength of the axle housing and reduces the quality, and the shaft head forming mold is formed with the axle housing body in the previous stage Equipment matching greatly saves the forming cost of the shaft head.

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, st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D53/88B21D37/10
CPCB21D37/10B21D53/88
Inventor 宋希亮王连东崔亚平麻付舜
Owner YANSHAN UNIV
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