RESEARCH ON THE FORMULA FOR PREDICTING THE FORMING LIMIT OF AUTOMOTIVE SHEET METAL
As a key performance indicator of automotive panels and an evaluation criterion for part deformation failure,forming limit plays an important role in the automotive component processing industry chain.Based on the prediction formula of forming limit,the forming limit can be quickly obtained based on the conventional mechanical performance indicators of materials,avoiding tedious and time-consuming testing experiments.This provides important theoretical and tool support for steel material enterprises to use the large-scale production testing to obtain forming limit indicators.An analysis was conducted on the prediction formula for the key indicator FLC0 of product forming limit proposed by foreign scholars.To address the issue of inconsistent evaluation criteria due to differences in calculation results among three formulas,22 types of automotive sheet metal products were tested for forming limit,and an analysis method for comparing the accuracy of forming limit prediction based on FLC0 was proposed.Based on the completion of uniaxial tensile mechanical performance testing,the FLC0 calculation results were obtained using three prediction formulas:Keeler,Cayssials,and Abspoel.The overall accuracy and specific product categories applicable to the three formulas were compared and analyzed.The research results show that there is a high correlation between the measured FLC0 of 22 commonly used automotive panel products and the calculated results using prediction formulas.However,there are significant differences in the prediction results of the forming limit among the three prediction formulas,and due to the differences in performance indicators used in the formulas,the overall universality of each formula and the applicability of specific automotive panel products are different.
万方数据
维普
