基于响应面法的无芯模成形精度研究

目的 提高无芯模旋压零件的尺寸精度.方法 利用双旋轮旋压机床,采用响应面实验优化设计方法,对铝合金零件分别从旋轮进给速度、芯模转速、锥形件的成形角度、坯料与成形件最大开口直径比等方面进行研究,建立其与尺寸精度的预测模型,采用Design-Expert软件对尺寸精度进行回归系数及方差分析,并对此工艺参数进行优化,得到最优...

Forming Accuracy of Mandreless Die Based on Response Surface Method

The work aims to improve the dimensional accuracy of mandreless die spinning parts. The twin-wheel spinning machine was used to study the aluminum alloy parts by the response surface experiment optimization design method from the feed speed of the wheel, the core die speed, the forming angle of the cone, the billet and the forming part of the maximum opening diameter ratio. The prediction model of aluminum alloy parts and dimensional accuracy was established. The regression coefficient and variance analysis of dimensional accuracy were carried out with Design-Expert software, and the process parameters were optimized to get the optimal values. Within the selected process parameters, diameter ratio had the greatest effect and forming angle, feed speed and core die speed had no obvious effect. When the feed speed was 50 mm/min, the rotation speed was 575 r/min, the forming angle was 30°, and the diameter ratio was 1.2, the dimensional accuracy deviation reached the minimum value of 0.5125 mm. The feed speed of the wheel, the forming angle of the cone and the ratio of the maximum opening diameter between the blank and the forming part have significant effects on the dimensional accuracy of the part, all of which are positively correlated with the dimensional accuracy deviation. However, the rotation speed of the core die has no obvious effect on dimensional accuracy. The maximum dimensional accuracy deviation occurs at the transition fillet of the core die and the flange edge.