Hot forming process and mould for crossed reinforcing bars of inside and outside surfaces of thin-walled barrel-type part

Abstract

The invention discloses a hot forming process and mould for crossed reinforcing bars of inside and outside surfaces of a thin-walled barrel-type part. According to the hot forming process, the high temperature radial rotary extrusion forming process is achieved in two modes; and compared with radial rotary extrusion forming at normal temperature, the hot forming process is capable of achieving thepurpose of feature integral forming of any crossed reinforcing bars of two surfaces of the thin-walled barrel-type part. The mould disclosed by the invention comprises an outer mould used for carrying a structural member, and an inner film is inlaid in the outer mould; the inner film is internally provided with a plurality of heating resistors, and piece moulds are arranged on the inner sides ofthe heating resistors; and the thin-walled barrel-type part is installed in the piece moulds, and the inner and outer walls of the piece moulds are provided with crossed reinforcing bar concave mouldsused for forming the crossed reinforcing bars on the inner and outer walls of the thin-walled barrel-type part.

Description

technical field [0001] The invention relates to the field of metal thermoforming, in particular to a thermoforming process and mold for inner and outer surface cross-rib thermoforming of thin-walled cylindrical parts. Background technique [0002] At present, the ring rib feature can be formed on the outer wall of the structural part through the ring rolling technology. The method is mainly to drive the driving roll to rotate and press down through the ring rolling machine to realize the continuous incremental plastic forming of the billet. The principle is to combine the ordinary driving roll and the passive roll Change to a roll with a ring rib feature, and control the circumferential flow of the material at the initial stage to increase the diameter of the entire ring. When the outer wall of the ring is in contact with the passive roll, the metal radial flow in the blank deformation zone will dominate, and the material will flow to The position of the ring rib, thereby fo...

AI Technical Summary

Problems solved by technology

[0005] 2) The formed ring rib is characterized by a single rib, and it is difficult to form a cross rib

Because compared with single ribs, the three-way flow law of the metal in the deformation zone of the blank will be more difficult to predict, and the mechanism of the forming process will be more complicated, and the corresponding ring rolling parameters will also change accordingly.

[0006] In addition, in the ring rolling process, the longitudinal ribs will face overlapping problems during the forming process. Since the diameter of the billet is different from that of the roll, it is difficult to ensure the repeatability of the longitudinal ribs of the cylindrical structural parts

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