应力松弛成形模具型面修正的方法研究

Study on the Surface Correction for the Mold of Stress Relaxation-forming

在应用应力松弛成形工艺成形小曲率、大尺寸壁板类零件的过程中,回弹是影响成形件尺寸和形状精度主要因素之一。本文中利用基础实验数据总结的经验公式作为初值,建立了基于模具实验迭代的回弹补偿修正算法。设计了模具型面迭代修正实验,并利用回弹现象较为严重的小曲率壁板零件进行实验对该回弹补偿修正算法的有效性进行了验证。

In the application of stress relaxation-forming process to form skin-panel part of small curvature and large size, springbaek is one of the main factors which influence the accuracy of the part＇s size and shape. In this paper the algorithm to compensate for springback is established by using the experience formula summarized from experimental data and the formula is used as the initial value of iteration. The iteration experiment of mold type surface is designed and used for validating the validity of the method which compensates the springback in the process of forming small curvature skin-panel in which the springback phenomenon is relatively serious.