A magnesium/aluminum alloy bimetal composite pipe forming die and method

Abstract

The invention provides a forming die and method for a magnesium / aluminum alloy bimetal composite pipe, and belongs to the technical field of metal plastic working. The forming die for the magnesium / aluminum alloy bimetal composite pipe comprises a main shaft, an extrusion gasket, an extrusion core pin, an extrusion cylinder lining, an extrusion cylinder, an extrusion die, a die-filling extrusion shaft, a cylindrical roller bearing, a thrust bearing, a gear A, a gear B, a sleeve, a gearbox, an end cap A, an end cap B and a shearing device. The extrusion cylinder, the extrusion cylinder lining,the main shaft and the extrusion core pin simultaneously move to the right to realize the extrusion forming process, furthermore, repeated rotation of the die-filling extrusion shaft in the extrusionprocess is realized through transmission of the gear A and the gear B, and after the extrusion is completed, extrusion remnant materials are cut off by the shearing device. Advantages of high pressuretorsion and extrusion forming are combined, blank is simultaneously subjected to extrusion and torsion actions, so that the metal flow resistance, the preheating temperature of the blank and the diecan be reduced, and the interface quality and dimensional accuracy of the composite pipe is improved.

Description

technical field [0001] The invention relates to the technical field of metal plastic processing, in particular to a magnesium / aluminum alloy bimetal composite pipe forming die and method. Background technique [0002] Magnesium alloy has low density, high specific strength and specific stiffness, good damping performance and electromagnetic shielding performance, and has broad application prospects in the aerospace field. However, compared with aluminum alloys, magnesium alloys have poorer corrosion resistance and toughness at room temperature, which largely restricts the application of magnesium alloys in the above fields. Based on the idea of ​​composite materials, the magnesium / aluminum composite tube with aluminum as a bushing is a new type of lightweight structure, which can replace the traditional aluminum alloy tubes in the transportation pipelines and support structures of aircrafts and rockets, and further realize the lightweight of aircraft. Quantify. However, th...

AI Technical Summary

Problems solved by technology

However, there are still limitations regarding the extrusion process in forming high-performance composite tubular components

Composite pipe components formed by traditional forming processes can be formed, but the obtained composite pipe interface quality is poor and the dimensional accuracy is insufficient, which is difficult to meet the high performance requirements of aerospace components

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