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通过改变激光功率、扫描速度、光斑直径、扫描次数及板料宽度对2 mm厚度的AISI304不锈钢板料进行激光热应力弯曲试验,分析了各工艺参数对弯曲角度的影响规律,对工件表面烧蚀情况进行评价,并对板料金相组织进行观察分析。试验结果表明:在试验参数范围内激光扫描次数、光斑直径、扫描速度和板料宽度对弯曲角度呈近似线性规律,而激光功率对弯曲角度的影响不呈线性规律;较大的面能量密度产生较大的弯曲角度。可通过工艺参数的合理组合在保证板料表面质量的前提下采用较大的面能量密度进行扫描以提高弯曲变形的效率。以上研究为精确控制板料激光弯曲成形奠定基础。
The laser thermal stress bending test of 2 mm thick AISI 304 stainless steel sheets was carried out by changing the laser power, scanning speed, spot diameter, scanning times and sheet width. The influence of various process parameters on the bending angle was analyzed. The situation is evaluated, and the sheet metal microstructure observation and analysis. The experimental results show that the number of laser scanning, the spot diameter, the scanning speed and the width of the sheet have an approximate linearity with respect to the bending angle within the experimental parameters, while the laser power has no linear effect on the bending angle. The larger surface energy density Big bending angle. Through the reasonable combination of process parameters, the surface energy of the sheet can be scanned with larger surface energy density to improve the bending deformation efficiency. The above research lays the foundation for the precise control of sheet metal laser bending.