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校形是保障板金属成形零件形状精度的重要手段。为改善校形效果、提高校形效率,提出了矫正其形状的新方法。该方法利用激光热源局部作用铝合金薄壁件待校形的区域,促使其弹性内能做塑性功并重新分布残余应力,达到提高校形效果和校形效率的目的。以航空用铝合金薄板进行三点弯曲试验得到待成形样件,激光热源沿其弯曲线进行扫描后,得到了一定的校形量,定量分析了校形效果,得出校形率的大小随试件的材质和厚度的不同而不同。试验结果表明了激光校形的可行性,为深入研究成形件的激光校形奠定了基础。
School form is to protect the shape of sheet metal forming parts of the important means of precision. In order to improve the shape effect and improve the shape efficiency, a new method to correct its shape is proposed. The method uses the laser heat source to locally act on the area to be shaped of the aluminum alloy thin-walled part to promote the plastic work within the elasticity and redistribute the residual stress so as to achieve the purpose of improving the shape-forming effect and the shape-forming efficiency. The aerospace aluminum alloy sheet was subjected to three-point bending test to obtain the sample to be formed. After the laser heat source scanned along its bending line, a certain amount of the shape was obtained, and the shape effect was quantitatively analyzed. Specimen of the material and thickness of the different and different. The experimental results show the feasibility of laser alignment, which lays the foundation for further study of the laser contouring of the forming part.