等离子熔积复杂金属零件的数字化制造方法

摘要

针对等离子熔积金属零件工艺特点,提出适应复杂形状金属零件的综合切片技术,包括适应单向生长、多向生长和渐变生长结构的等离子熔积制造需求的切片方法;引入具有全局优化特性的基于Voronoi图方法的轨迹规划技术,同时考虑自行研制的多轴数字化等离子熔积制造平台性能,提出了熔积电流和进给量等制造参数实时控制方法,通过帽形件和中空螺线管制造实验验证了该方法的有效性.本方法解决了等离子熔积复杂金属零件的支撑工艺问题,并通过再切片方法消除了熔积制造中的阶梯效应,提高了制造精度.为等离子熔积制造复杂形状金属零件提供了较为完整的数字化理论与技术支持.%Aimed at the characteristics of plasma depositing metal part process, we proposed the combination slicing technology for the complex metal part, including single direction growth, multidirectional growth and gradient growth structure slicing method, to meet the requirement of the hybrid plasma deposition process. Then we introduced the path generation technology with global optimization characteristics based on Voronoi diagram method, and proposed the real-time control method of the plasma deposition current and feeding rate parameters, considering the performance of self-developed multiple axes digital hybrid plasma deposition platform. The effectiveness of the proposed method was verified by the cap shape pieces and hollow solenoid manufacturing experiment. This method solves the supporting process problems of hybrid plasma deposition complex metal parts, and eliminates the staircase effect of plasma deposition process by re-slicing, which improves the manu?facturing precision. It provides a relatively complete digital theory and technical support for plasma depositing complex metal part.