Laser-assisted roll bending forming method for section bar difficult to deform

Abstract

The invention discloses a laser-assisted roll bending forming method for section bar difficult to deform. The method comprises the following steps that, a stress concentration area during roll bending of the section bar difficult to deform is determined; a stress concentration area is subjected to irradiation heating through a laser beam in advance when the section bar is rolled and bent; and the heated section bar is subjected to roll bending forming. According to the method, the plastic flowing capacity and the forming limit of the section bar difficult to deform are improved mainly through the laser heating effect, so that the problems of cracking, wrinkling, torsional deformation and the like during direct roll bending of the section bar difficult to deform are solved, the bending resilience of the section bar is remarkably reduced, and the forming precision is improved.

Description

technical field [0001] The invention relates to the technical field of material plastic forming, in particular to a laser-assisted roll-bending forming method for difficult-to-deform profiles. Background technique [0002] Roll forming is a common plastic forming process, which has been widely used in aerospace, energy and chemical industry, military medical treatment, ship engineering, automobile manufacturing and other fields to form various sheets and profiles with curvature. In the past, the roll-formed profiles were mostly made of conventional materials such as steel and aluminum, and the materials had good plasticity, the difficulty of roll-bending was not large, and the yield was high. However, in recent years, my country's demand for lightweight high-strength profiles and high-temperature resistant profiles has become more and more urgent, such as high-strength aluminum alloy profiles, aluminum-based composite profiles, titanium alloy profiles, titanium-based composi...

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Problems solved by technology

[0003] The object of the present invention is to provide a laser-assisted roll bending forming method for difficult-to-deform profiles, which can solve the problems of cracking, wrinkle deformation, torsional deformation, etc. during direct roll bending of profiles, and significantly reduce the bending springback of profiles after roll bending, realizing difficult High-quality forming manufacture of deformed profiles

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