Continuous reducing die for swelling-pressure-formed axle housings of small and medium-sized automobiles

Abstract

The invention discloses a continuous reducing die for swelling-pressure-formed axle housings of small and medium-sized automobiles. The continuous reducing die is installed on a three-way hydraulic machine. On the three-way hydraulic machine, slide blocks drive an upper die I and an upper die II to move and clamp the middle portion of a pipe blank together with a lower die I and a lower die II. A left slide block and a right slide block of the three-way hydraulic machine drive a left reducing female die I, a right reducing female die I, a left reducing female die II and a right reducing female die II to move. A left central piston and a right central piston in the left slide block and the right slide block drive a left mandrel I, a right mandrel I, a left mandrel II and a right mandrel II to move. By means of central key guide plates which are arranged on a left bearing plate and a right bearing plate and central keys which are arranged on a lower die plate, a left mandrel fixing plate and a right mandrel fixing plate, it is ensured that the middle portion of the pipe blank is coaxial with the left side and the right side during reducing of a first station and a second station. By means of the reducing die, two passes of reducing including first-time reducing and second-time reducing can be completed on the same die at the same time. By means of the continuous reducing die, the production efficiency can be improved by nearly 50%, the manufacturing cost is remarkably reduced, and meanwhile the continuous reducing die has the beneficial effects that the reducing deformation amount of each single pass is large, the mandrels are convenient to replace and the wall thickness of the pipe blank subjected to reducing is easy to control.

Description

technical field [0001] The invention relates to the technical field of pipe plastic forming, in particular to a continuous diameter-reducing mold for small and medium-sized automobile expansion and compression forming axle housings. Background technique [0002] The automobile axle housing is a key part of the automobile chassis. At present, it is mainly manufactured by casting and stamping welding. The quality of the castings is large, the material and energy consumption is high, the environment is polluted, the performance of the stamping and welding parts is unstable, and the material utilization rate is low, and the welding quality requirements are high. . Some literature proposes to use the steel tube expansion and compression forming method to manufacture automobile axle housings, that is, the two ends of the seamless steel tube are reduced in diameter, and the middle part is hydraulically bulged to obtain an axisymmetric or nearly axisymmetric preformed tube blank, an...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the small and medium-sized automobile axle housing expansion and compression forming process, when the free diameter reduction is adopted, the diameter reduction deformation is small, the forming process is more, and the mandrel external pulling force is small when the reverse mandrel is used to push the diameter, and the mandrel is inconvenient to replace, etc. Problem, the present invention provides a continuous diameter reduction mold for small and medium-sized automobile expansion and compression forming axle housings, and the diameter reduction mold can simultaneously complete the first and second two-pass diameter reduction

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