光丝同轴激光增材制造研究进展

增材制造作为实现三维结构快速成形的技术,广泛用于航空航天、汽车交通等领域.当前,激光熔丝增材制造多依托于传统的激光焊接设备,采用旁轴送丝方式,在增材过程中,需调整激光头方向保证送丝和焊接头行进的相对方位,增大了复杂构件增材制造系统控制难度,损失了加工自由度.随着激光加工设备和技术的发展,近年来出现了一种可以解决上述问题...

Research progress of coaxial laser wire additive manufacturing

Additive manufacturing is widely applied in aerospace and automobile industries due to its ability to realize rapid prototyping of three-dimensional structures. The current wire-based laser additive manufacturing mostly relies on the traditional laser welding equipment with a lateral wire feeding method. However, in additive manufacturing with lateral wire feeding, it is necessary to adjust the direction of laser processing head to ensurea fixed relative position between wire and processing head, resulting in a significant increase in complexity of system control and obvious loss of processing freedom. With the development of laser processing equipment and technology, a novel process of coaxial laser wire additive manufacturing has emerged with the potential to solve the aforementioned problem. Since the process is just getting started, in order to better understand the characteristics of coaxial laser wire additive manufacturing, the research progress of coaxial laser wire additive manufacturing was summarized from the perspectives of implementation principle, processing characteristics, precision control, and microstructure and properties of additive manufactured components. The differences between laser wire additive manufacturing with coaxial wire and lateral wire feeding were analyzed. Two precision control methods for coaxial laser wire additive manufacturing and their characteristics were demonstrated. The microstructure and properties of components made by coaxial laser wire additive manufacturing were analyzed. In the end, the further research trend for coaxial laser wire additive manufacturing was put forward.