激光成形工艺方法及其发展前景英文文献翻译激光成形工艺方法及其发展前景英文文献翻译.docVIP

Process and Development of Laser Forming CHEN Dun-jun　XIANG Yi-bin　WU Shi-chun　LI Miao-quan （College of Materials Science and Engineering,Northwestern Polytec hnical University） Abstract:　Process characteristics and four different types of met hods which include sheet bending towards the laser beam,sheet bending away from the laser beam,rod bending and space deformation are introduced.The different f orming mechanisms and possible applying fields are stated.The development prospe ct of laser forming is forecast. Key words:　 laser forming; sheet; rod; forming mechanism Laser forming is a kind of material by laser beam irradiationto form the internal surface of non-uniform thermal stress fieldto achieve the material forming the new technology. By adjusting the laser machining process parameters and select the appropriate scan path can be formed on any of thebending parts, pipe fittings and other complex three-dimensional surface and other parts. Compared with the conventional shape, and its distinguishing feature is [1 ~ 5]: ① laser forming is freeform, so the production cycle is short, flexible large, especially for small batch production of largeparts; ② forming a non-contact laser forming, Deformationwithout external force, and thus does not produce rebounddeformation and the resulting problems; ③ laser forming is ahot forming, the deformation of the total accumulated by themultiple scans. And is carried out under the hot, thereforedifficult to shape at room temperature, the difficulty of sheet metal forming deformation or brittle material. 1.Laser forming process equipment Because the laser beam forming the pattern of no specificrequirements, therefore, currently on the market for cutting and welding, the conventional laser processing machine (such asCO2, excimer, Nd: YAG laser) can be used for laser forming.According to different requirements of the workpiece shape,choose the second axis, three-axis or five-axis laser processing machine, in order to obt