基于二次回归正交旋转试验熔融沉积超声振动成型研究

为了研究超声振动对熔融沉积成型(FDM)制品力学性能的影响以及各变量之间的相关关系,在原有熔融沉积成型设备的基础上增加了超声振动系统,采用单因素试验与二次回归正交旋转组合试验相结合,分别以打印外壳厚度、填充密度和超声波功率3个因素为研究对象对FDM成型工艺进行研究.结果表明,超声振动功率对材料的拉伸性能具有很大的影响,...

Study on ultrasonic vibration molding of melt deposition based on quadratic regression orthogonal rotation test

To understand the influence of ultrasonic vibration on the mechanical properties of fused deposition molded （FDM） products and the correlation between various variables， an ultrasonic vibration system was added to the original fused deposition molding equipment， and the fused deposition molding process was studied through combining a single factor experiment method with a quadratic regression orthogonal rotation combination experiment. In this study， the printing shell thickness， filling density and ultrasonic power were taken as research objects. The results indicated that ultrasonic vibration power generated a great influence on the tensile properties of materials. Under the same conditions， the materials achieved an increase in tensile properties by 13.8 % after ultrasonic treatment. Through response surface analysis and variance analysis， it is concluded that the above three factors and the interaction between shell thickness and packing density exhibited the most significant influence on tensile properties. The optimum technological parameters were determined to be a shell thickness of 1.2 mm， a packing density of 90 %， and an ultrasonic power of 40 W. The quadratic regression model of shell thickness， packing density and ultrasonic power was established using the test data， and the reliability of the regression model was tested. The obtained results indicated that the regression model was reliable and could be used to predict the optimized processing conditions of the tensile test.