CAJ | 학술논문

影响高强钢厚板弯曲成形的工艺参数较多，难以精确建立工艺参数与成形质量之间的关系。文章以凸模圆角半径、摩擦系数、冲压速度为自变量进行三因素三水平正交试验，模拟Q550钢15 mm厚板弯曲成形过程，获得回弹角和最大成形力的数据。利用灰色系统理论，分别计算成形工艺参数对单目标函数的关联系数和多目标函数的关联度，将多目标转换为以关联度为目标的单目标；进一步计算各成形工艺参数的平均关联度，将优化的凸模圆角半径、摩擦系数、冲压速度等参数进行有限元模拟验证，经理论指导设计、试模，其成形的厚板质量得到明显提高。
영향고강강후판만곡성형적공예삼수교다，난이정학건립공예삼수여성형질량지간적관계。문장이철모원각반경、마찰계수、충압속도위자변량진행삼인소삼수평정교시험，모의Q550강15 mm후판만곡성형과정，획득회탄각화최대성형력적수거。이용회색계통이론，분별계산성형공예삼수대단목표함수적관련계수화다목표함수적관련도，장다목표전환위이관련도위목표적단목표；진일보계산각성형공예삼수적평균관련도，장우화적철모원각반경、마찰계수、충압속도등삼수진행유한원모의험증，경이론지도설계、시모，기성형적후판질량득도명현제고。
The thick plate bending is a complicated process with numerous forming parameters ,so it is difficult to accurately es-tablish the relationship between the process parameters and the forming quality .The bending of 15mm Q550 steel sheet was simu-lated with a designed orthogonal test of three factors and three levels to estimate the springback angle and the maximum forming force .In such simulation ,the independent variables are punch radius ,friction coefficient ,punch velocity .Based on the grey sys-tem theory ,the correlation coefficient of single objective function and the correlation of multi-objective function affected by form-ing parameters were estimated ,and the multi-objective had changed into the single objective with relevancy targeted .After that , the average relevancy of each forming parameters was calculated to optimize the parameter such as punch radius ,friction coeffi-cient and punch velocity .The optimized simulation shows that the forming quality has a significant improvement .