基于PCA和TOPSIS的激光熔覆最佳工艺参数评价方法

Evaluation method of optimal process parameters of laser cladding based on PCA and TOPSIS

为了提升激光熔覆质量,获取最佳的激光熔覆工艺参数,提出基于PCA和TOPSIS的激光熔覆最佳工艺参数评价方法。在边界条件和假设条件下构建激光熔覆温度场分布模型,利用主成分分析法获取分布模型中主要的工艺参数,并结合TOPSIS方法对激光熔覆最佳工艺参数进行评价,获取最佳的激光功率、扫描速度。仿真实验结果表明,分析熔覆过程中温度场的变化情况,判断激光功率和扫描速度两种工艺参数对激光熔覆的影响;并利用文献方法和所提方法进行对比可知,所提方法进行激光熔覆最佳工艺参数评价的精度最高可达99.12%,评价精度较高,提升了激光熔覆质量。

In order to improve the quality of laser cladding and obtain the best laser cladding process parameters,an evaluation method of the best laser cladding process parameters based on PCA and TOPSIS is proposed.The temperature field distribution model of laser cladding is constructed under boundary conditions and assumptions.The main process parameters in the distribution model are obtained by principal component analysis,and the best process parameters of laser cladding are evaluated by TOPSIS method to obtain the best laser power and scanning speed.The simulation results show that the changes of temperature field in the cladding process are analyzed,and the effects of laser power and scanning speed on laser cladding are judged;The comparison between the literature method and the proposed method shows that the accuracy of the evaluation of the best process parameters of laser cladding by the proposed method is up to 99.12%,which has high evaluation accuracy and improves the quality of laser cladding.