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Indexed by:期刊论文

Date of Publication:2013-10-01

Journal:INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:69

Issue:1-4

Page Number:909-917

ISSN No.:0268-3768

Key Words:Laser bending; Steel tube; Scanning path planning; Geometric curvature; Decomposition; Restructuring

Abstract:In order to obtain a three-dimensional curved steel tube, a bending method is presented based on geometric curvatures with a scanning path planning decomposed into a two-dimensional model and restructured into a three-dimensional model, sequentially. In the decomposition and restructuring, tube plane bending is simplified into two-dimension curve project, while 3D tube bending is equivalent to two 2D space curves' projects. In 2D bending, the plane deals with modeling idea based on the extreme points and inflection points of two-dimension curve. The main idea performs narrowing of scanning path near extreme point area, but widening scanning path near inflection point. In 3D bending, the forming surface is decomposed into two planar curves by projecting on two vertical planes. Respective scanning path planning and process parameters are thus acquired. By combining the data in the two-dimension planes, the three-dimension scanning path plane was obtained. Finally, an experimental verification is carried out to bend straight tubes into a two-dimension sinusoidal and a three-dimension helical tube/coil-shaped. The results show that the scanning path planning proposed in this paper is effective and feasible.