焊接工装夹具英文资料.pdf

Int J Adv Manuf Technol (2001) 18:266–275  2001 Springer-Verlag London Limited Principle and Simulation of Fixture Configuration Design for Sheet Metal Assembly with Laser Welding. Part 1: Finite-Element Modelling and a Prediction and Correction Method B. Li, B. W. Shiu and K. J. Lau Department of Mechanical Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong The quality of the stamping process has a direct effect on Because of the high weld quality and relatively low manufactur- laser welded sheet metal assembly. The fixture plays an ing cost, laser welding has great potential for replacing other important role in the satisfactory metal fit-up that laser welding welding techniques. However, a few problems related to laser requires. The traditional “3-2-1” locating scheme will no welding limit its application in industry. When laser welding longer suffice for the deformable laser sheet metal assembly is applied in the assembly process, metal fit-up becomes crucial process. Because of the often poor stamping quality, a complex in ensuring correct implementation of laser welding and in die fixture has to be employed to meet the metal fit-up require- improving weld quality [1]. However, the capability of the ments. The die fixture corresponds to an “infinite-2-1” locating current stamping process cannot satisfy the metal fit-up accu- scheme where the tooling cost is very high and yet lacks racy required by laser welding. In 1974, the United Technology flexibility. This limits the application of laser welding. In this Corporation delivered a 6 kW CO2 laser to the Ford Motor paper, a new locating scheme with both total locating and