摘要
针对灰斗车拉深成形过程中产生的缺陷问题,基于图像方法对试样进行单向拉伸试验,获得材料真实力学性能参数。借助Dynaform软件对成形过程进行数值模拟,以冲压速度v、压边力F和摩擦因数C作为影响板料成形质量的因素,以最大减薄率y_(1)和最大增厚率y_(2)作为优化目标,采用Box-Behnken(BBD)设计响应面试验,建立工艺参数与y_(1)、y_(2)之间的二次多项式响应目标函数,得到影响灰斗车拉深成形质量的最优工艺参数组合。最后,通过数值模拟及实际生产进行验证,试验结果表明,该方案有效提高了灰斗车零件的成形质量,消除了灰斗车成形缺陷,为此类拉深件的缺陷优化提供了有效参考。
For the defect problem in deep drawing process of gray hopper,the unidirectional tensile experiment of specimens was carried out based on image method,and the real mechanical property parameters of material were obtained.Then,the forming process was numerically simulated by software Dynaform.Furthermore,taking stamping speed V,blank holding force F and friction factor C as the factors affecting the forming quality of sheet metal,and taking the maximum thinning rate y_(1) and the maximum thickening rate y_(2) as the optimization objectives,the response surface method(RSM)experiment was designed by Box-Behnken(BBD),and the quadratic polynomial response objective function between process parameters and y_(1) and y_(2) was established to obtain the optimal process parameter combination that affected the forming quality of the gray hopper.Finally,the experimental results show that the scheme can effectively improve the forming quality of the gray hopper,eliminate the forming defects of the gray hopper,and provide an effective reference on the defect optimization for this kind of deep drawing parts which was verified by the numerical simulation and actual production.
作者
刘尚保
龚红英
尤晋
施为钟
廖泽亮
廖泽寰
Liu Shangbao;Gong Hongying;You Jin;Shi Weizhong;Liao Zeliang;Liao Zehuan(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Shanghai Dongfu Cold-forging Manufacturing Co.,Ltd.,Shanghai 201100,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2022年第7期86-94,共9页
Forging & Stamping Technology
基金
汽车蓄能器壳体零件冷温段复合成形技术开发((12)CL-003)。
关键词
灰斗车
拉深成形
响应面
冲压速度
压边力
摩擦因数
gray hopper
deep drawing
response surface
stamping speed
blank holder force
friction factor
