Roll type cold pressing processing method and device for vehicle driving axle housing

Abstract

A roll typed impact extrusion processing method and a device of automobile drive axle housing adopts roll typed impact extrusion technique to manufacture a lute-shaped housing expanded from the middle of the driving axle housing, namely, axial compressive force is loaded to the both ends of the axle housing roughcast or the semi-finished product; in the forming die, dedicated roll pressured rolling of the driving gear is adopted to implement repeated rolling and progressive roll typed impact extrusion operation to the inner wall of the workpiece, and processes the workpiece into the needed axle housing shape. As a lute-shaped hole of the middle of the axle housing is molded by reaming and roll typed impact extrusion technology, the volume of the metal material is progressively transferred a plurality of times, and the thickness of the deformation part of the material basically remains the same, so that the metallurgical structure of the steels of the area is compact, furthermore, surface hardening greatly strengthens all the mechanical performance of the corresponding parts of the axle housing body, and improves the integral mechanical strength and rigidity of the axle housing. The method has the advantages of simple technique, convenient operation, little investment of the dedicated device and die, reliable work, and simple and easy product model conversion, which is suitable for batch produce with a plurality of varieties.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for efficient and precise creation of tubular passages (through holes), called tunnels). These passageways help cool down the engine's heat during its use. By doing these techniques with integrally driven hubs instead of traditional methods like casting, they allow for more space between them while also reducing weight compared to other ways such as cast iron. Additionally, there is less expensive materials needed due to their unique shapes and dimensions. Overall, this new technique simplifies the way we produce vehicles and increases durability over time.

Problems solved by technology

The technical problems addressed in this patent text are related to the production methods and characteristics of drive axle housings. The text discusses four different production methods: casting, stamping and welding, extrusion, and intubation. Each method has its own advantages and disadvantages in terms of rigidity, strength, weight, production efficiency, material utilization, and cost. The patent aims to find a production method that can ensure the reliability and service life of the car's drive axle housing while meeting various design requirements.

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