Tensile bending forming process of complex section bar

Abstract

The invention provides a tensile bending forming process of a complex section bar, relating to the technical field of section bar bending forming and solving the problems of quality defects generated in a section bar bending process in the prior art. The tensile bending forming process of the complex section bar comprises the following steps of: manufacturing a concave mould cavity and a movable mould which corresponds to the concave mould cavity according to the bending radius, the bending angle and the sectional shape of a machined part; rotating a regulating mechanism to loosen the movablemould, and placing the section bar into the concave mould cavity; clamping one end of the section bar into a collet, and placing the other end of the section bar into a stretching device; applying a pulling force on the stretching device so that the section bar generates elongation, and rotating the regulating mechanism to enable the movable mould to tightly press on the section bar; applying a bending moment to the movable mould to enable the movable mould, the section bar and the stretching device to rotate along a scale so as to enable the section bar to be bent at a needed angle; and rotating the regulating mechanism, removing the movable mould, the stretching device and the collet, and taking out the bending formed section bar. According to the tensile bending forming process disclosed by the invention, the section bar with a complex sectional shape can be formed; the forming quality of a bending part is good, and a resilience amount is small.

Description

technical field [0001] The invention relates to the field of profile bending, in particular to a complex profile tension winding forming process. Background technique [0002] Bending processing of profiles occupies a very important position in industrial sectors such as metal structures, engineering machinery, vehicles and aerospace. In particular, the use of complex profile bending parts can reduce product costs and meet the demand for lightweight products. It has broad application prospects in the automotive and aerospace industries. At present, the bending processes of profiles mainly include stretch bending, winding bending and rolling bending. [0003] Stretch bending is a commonly used method of profile bending, but the outer side of the profile bent by this method has been excessively thinned or even cracked. When the profile is formed by bending, the springback of the profile is large, and the section distortion is serious. The profile formed by the roll bending ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings, the object of the present invention is to provide a tension winding forming process capable of forming complex cross-section profile bending parts, so as to solve the problem of quality defects in the profile bending process in the prior art

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