Research on the Solution of Insufficient Stretching in Shallow-drawing Process of Car Roof Panel

摘要

Based on the shallow-drawing analysis of car roof panel, the problem of insufficient stretching during the drawing process was studied. Reasons and solutions were discussed. The finite element software was used for the numerical modeling of the drawing process. Three parameters, namely distribution of the lock force percentage, distance of the drawbeads and blank holder force, were testified with the orthogonal experimental design method. The influence of each parameter on insufficient stretching of the blank was analyzed with other two parameters unchanged. According to the results of orthogonal experiment, the process parameters were optimized to control the defects of panel during drawing process. The research can be a valuable reference for solving the deficient stretch in the process of drawing.