Roller press forming method of low-plastic alloy ultra-large deformation thin-wall pipe

Abstract

The invention discloses a roller press forming method of a low-plastic alloy ultra-large deformation thin-wall pipe. The roller press forming method comprises a main shaft, a limiting support and a power device, and further comprises a roller-wave device and a shaping device, the roller-wave device comprises a plurality of roller-wave supports and a variable-diameter mandrel, and roller-wave diessare arranged on the roller-wave supports; the shaping device comprises a plurality of shaping supports, roller flat dies, a main shaft and the roller-wave supports are arranged on the shaping supports, and the shaping supports are connected with a power device. According to the roller press forming method, the step-by-step rolling mode is adopted in the pre-forming stage of a pipe blank, so thatthe problem that a traditional roller press is difficult to form is solved, and meanwhile, the problem that a traditional roller press tube blank is pressed by multiple waves in a synchronous roller is also solved, and the problem that the transition is thinned due to the fact that materials at the trough position cannot flow into the pipe blank is solved; and in the pipe blank shaping stage, a stepping rolling mode is adopted for machining, the flowing resistance of materials in the deformation process can be reduced, and the materials at each position of the shaped pipe wall can be uniformlydistributed.

Description

technical field [0001] The invention relates to the technical field of roll forming of thin-walled tubes, in particular to a roll forming method and device for thin-walled tubes of ultra-large deformation of low-plasticity alloys. Background technique [0002] The traditional forming of alloy thin-walled pipe fittings generally adopts roll forming, internal high pressure forming or warm forming, but there are the following problems: [0003] 1. Because the material of alloy thin-walled pipe fittings is a low-plastic material (such as magnesium-aluminum alloy), it is difficult to achieve large deformation at room temperature, and processing by rolling will cause rounded corners of thin-walled pipe fittings to wrinkle. If there is no support inside the thin-walled pipe fittings during processing, instability will also occur, and even cracks will occur due to local transitional thinning of the pipe fittings during rolling; [0004] 2. When using internal high-pressure machinin...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a roll forming method for ultra-large deformation thin-walled tubes of low-plasticity alloys. This method is intended to reduce production costs, solve problems such as difficult forming and uneven distribution of tube wall materials, and further provide Forming device required for this method

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