Sn63Pb37单层单道熔融涂覆样件工艺参数-截面尺寸建模与分析

Modeling of process parameters and sectional shape in sample of single-layer single-pass Sn63Pb37 fused coating additive manufacturing

采用Design Expert 8.0.6软件进行单层单道中心组合试验设计,将试验数据处理和回归模型建立有机统一,建立二次回归模型并进行回归方程显著性校验、回归方程拟合度校验及回归系数显著性校验,剔除回归模型方程中不显著变量,确定了工艺参数(涂覆压力、涂覆喷头至基板距离、扫描速度)与形貌特征尺寸回归模型。离线分析工艺参数-形貌特征尺寸二次回归模型,定量研究得到工艺参数对形貌特征尺寸影响规律,为后期深入研究金属熔融涂覆工艺参数及形貌控制提供依据。

In this paper, the Design Expert 8.0.6 software is used to design the single-layer single-pass center composite experiment, and the software can realize the experimental data processing and the regression model establishing organically unity meanwhile. In the reasonable parameters, the quadratic regression e- quations between the single deposition layer cross-sectional size and process parameters were established by performing the second regression experiments. The misalignment and significance of the quadratic re- gression equations were checked and the non-significant variables in the regression model equation were excluded. The quantitative influence of main fimning parameters （ coating pressure, scan speed and dis- tance between nozzle and substrate） on the single-layer single-pass cxoss-sectional size was analyzed.