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以高强钢拼焊板为研究对象,基于有限元软件Dynaform对某轿车前地板纵梁成形过程进行工艺设计并利用模拟结果进行工艺优化。将考虑每道工序变形累积的回弹模拟结果和不考虑每道工序变形累积的回弹模拟结果进行对比分析,结果表明,考虑变形累积可以提高回弹模拟精度,并对每工序卸载回弹结果进行补偿。基于补偿结果进行实际生产,运用白光扫描仪对零件进行逆向获取新模型,并与原始模型对比得到回弹结果,发现零件两侧直壁和圆角部分主要存在正偏差,且两侧回弹不一致。以新模型为基础再次进行回弹补偿,对整形模具进行修整,最终得到满足工程需要的零件。
Based on the finite element software Dynaform, a high-strength steel tailor welded plate was chosen as the research object. The process design of a front car roof longitudinal beam was carried out based on finite element software and the simulation results were used to optimize the process. Comparing the springback simulation results considering the accumulated deformations of each process with the springback simulation results without considering the cumulative deformations of each process, the results show that considering the cumulative deformation can improve the precision of springback simulation and unload the springback results for each process Compensation. Based on the compensation results, the new model was obtained by reverse scanning with the white light scanner and compared with the original model. The results showed that the straight wall and the fillet on both sides of the part were mainly positive deviations, and the springback on both sides was inconsistent . Based on the new model, rebound compensation is performed again, and the shaping mold is trimmed to finally obtain the parts that meet the engineering needs.