فصلنامه
نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار مهندسی مکانیک - دانشگاه صنعتی اراک
2 دانشگاه صنعتی اراک
3 گروه ساخت و تولید، دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
Laser bending of metal sheets is one of the most common forming processes and is widely used across various industries. Perforated sheets, due to their geometric discontinuities, encounter serious challenges during mechanical bending operations, which lead to ovalization of the holes and reduced dimensional accuracy. In this study, laser bending of 2-mm-thick perforated 304 stainless steel sheets is performed using a CO₂ laser, based on an experimental design developed through the response surface methodology and the Box–Behnken algorithm. For this purpose, the effects of process parameters—including laser power, scan speed, and laser beam diameter—on the percentage of hole ovalization are investigated. The results show that increasing the laser power and beam diameter increases ovalization, while increasing the scan speed reduces it. Analysis of variance of the statistical model indicates the significance of the main effects, interactions, and second-order terms of the parameters. Parameter optimization reveals that, in order to achieve minimum ovalization (0.22%), the laser power, scan speed, and beam diameter should be set to 87 W, 75 mm/min, and 2 mm, respectively.
کلیدواژهها English
