中国激光, 2020, 47 (3): 0302004, 网络出版: 2020-03-12
层状金属复合板的激光弯曲成形及边缘效应控制 下载: 802次
Laser Bending and Edge Effect Control of Laminated Metal Composite Plate
激光技术 激光弯曲 层状金属复合材料 边缘效应 成形精度 ABAQUS软件 laser technique laser bending layered metal composites edge effect forming precision ABAQUS software
摘要
为了进一步阐释激光弯曲成形以及边缘效应机理及其控制策略,基于ABAQUS有限元分析软件,建立了不锈钢-低碳钢-不锈钢层状复合板的激光热成形模型,对激光扫描过程中复合板的层间温度场与应力应变场进行了量化分析。研究发现:不锈钢与低碳钢导热性能的差异有利于弯曲角度的形成;造成边缘效应的主要原因是加热路径上温度及板内约束的非均匀化分布;重复加热的方式可以改善表面温度分布,提高成形精度。提出了4种新的扫描策略,最大可使表面温度的相对变化率降低36%,加热线上弯曲角的相对变化率降低51.8%,提高了成形精度,为工业化生产中复合板弯曲成形扫描策略的选择提供了参考。
Abstract
To elucidate the mechanisms of laser bending and edge effect and its control strategy, we constructed a laser thermoforming model of stainless steel-low carbon steel-stainless steel laminated metal composite plate using finite element analysis software ABAQUS. The temperature field and stress and strain fields between composite plates in laser scanning were quantitatively analyzed . The results from our study show that the difference in thermal conductivity between stainless steel and low carbon steel results in the formation of a bending angle. The main cause of the edge effect is the nonuniform distribution of temperature and plate constraints along the heating path; repeated heating improves surface temperature distribution and increases forming accuracy. Four new scanning strategies are proposed; these strategies reduce the relative change rate of surface temperature by 36% and the relative rate of change of the bending angle along the heating line by 51.8%, which improves the forming precision. Our results provide a guideline for the selection of scanning strategy for composite metal plate bending formation in industrial production.
王晓岗, 石永军, 郭延阔, 孙瑞. 层状金属复合板的激光弯曲成形及边缘效应控制[J]. 中国激光, 2020, 47(3): 0302004. Wang Xiaogang, Shi Yongjun, Guo Yankuo, Sun Rui. Laser Bending and Edge Effect Control of Laminated Metal Composite Plate[J]. Chinese Journal of Lasers, 2020, 47(3): 0302004.