Forming method for medium-thick wall integrated automobile driving axle housing-axle arch

Abstract

The invention discloses a forming method for a medium-thick wall integrated automobile driving axle housing-axle arch. The forming method comprises the following steps: 1, taking materials, namely, taking a seamless steel tube as a base material before an axle arch is formed, wherein the two ends of the seamless steel tube are formed into stepped shafts, the four surfaces of the seamless steel tube are planed into squares, and a prefabricated hole in a specific shape is cut into the central part; 2, determining the radial deformation amounts of the axle arch in different processes; 3, performing two-track wedging pre-expanding; 4, heating the central expanding area of a driving axle housing; 5, performing radial composite mechanical expansion forming; 6, performing axial shaping; and 7, cutting off the gaps in the two sides of a driving axle lute hole and sealing and welding a triangular plate. According to the forming method for the medium-thick wall integrated automobile driving axlehousing-axle arch, the production process is simple; the operation is reliable and reasonable; the welding seam which penetrates through the axle housing is eliminated; the axle arch with a smooth arc transition structure is formed, which is beneficial to structure optimization of the driving axle housing; a steel tube expansion type axle arch is no longer confined to a diamond structure; the appearance of the axle housing is beautified; and the rigidity and the strength of a product are also improved.

Description

technical field [0001] The invention relates to a method for forming a medium-thick-walled integral automobile drive axle housing bridge arch. More specifically, it involves taking the medium-thick wall seamless steel pipe as the base material after completing the shaft head and push square forming at both ends and cutting the prefabricated holes, after two passes of wedge pre-expansion, radial composite mechanical expansion and shaft expansion. The processing method and forming equipment used to complete the medium-thick-walled integral automobile drive axle housing bridge arch in the process of shaping and other processes belong to the technical field of basically no-cutting processing and forming of metal pipes. Background technique [0002] The drive axle system is one of the most important parts of the vehicle, together with the engine and the cab, it is called the three major assemblies of the car. The drive axle system is located at the end of the drive train of the ...

AI Technical Summary

Problems solved by technology

Taking the well-known 1141 series automobile drive axle housing as an example, the shape of the product bridge arch is designed to be nearly circular, and the two sides of the bridge arch have large arc transition bends, but the existing or proposed steel pipe expansion methods are not suitable for forming large arcs. The curved surface contour is more difficult, forcing this series of axle housings to still be manufactured by steel plate stamping and welding. In order to ensure sufficient rigidity and strength, the wall thickness has to be increased, resulting in a significant increase in weight, which is inconsistent with the trend of lightweight vehicles

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