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通过理论计算和实验研究了激光焊接中聚焦透镜的热效应，以及聚焦透镜的热效应对激光焊接工艺的影响，找出了其中一些规律，对激光焊接工艺和提高焊接质量有一定指导意义。
The thermal effects of the focusing lens in laser welding and the thermal effects of the focusing lens on the laser welding process are studied theoretically and experimentally. Some of the laws are found out, which is of guiding significance to the laser welding process and the welding quality improvement.