激光直接金属沉积工艺能效的田口试验研究

为了研究金属激光直接沉积工艺过程中工艺参量对工艺能效的影响，采用自主研发的HCX60五轴激光复合制造机床开展工艺能效田口试验，并对其结果进行了信噪比分析、极差分析以及方差分析，得到激光功率、送粉量、扫描速率、提升量以及搭接率对工艺能效的影响主次关系，提出了工艺因素优化组合。结果表明，送粉量对工艺能效的影响最为显著，最佳参量组合为激光功率P=500W，送粉量f=28g/min，扫描速率v=600mm/min，提升量h=0.6mm和搭接率λ=30%。这为研究增材制造工艺参量对工艺能效的作用及影响规律提供了理论借鉴和实验基础。

Taguchi experimental investigation on process energy efficiency of laser direct metal deposition

In order to study influence of direct metal laser deposition process parameters on the process efficiency, a self-developed HCX60 five-axis laser composite manufacturing center was adopted to carry out Taguchi experiment for process efficiency. Signal-to-noise ratio analysis, range analysis and variance analysis were used to analyze the results. The influence of laser power, powder feed rate, scanning rate, lifting capacity and overlap ratio on process energy efficiency was discussed and the optimum combination of technological factors was put forward. The results show that, powder feeding rate is the most significant parameter for the process of energy efficiency. The best combination of parameters is laser power P of 500W, powder feeding rate f of 28g/min, scanning speed v of 600mm/min, lifting capacity h of 0.6mm and overlap rate λ of 30%. The research provides theoretical and experimental grounds for further studying the effect of process parameters on process energy efficiency and its influence rule.