摘要
为控制深筒形制件的多步冲压成形质量,采用成形仿真工艺方案优化和正交试验设计的均值差分析工艺参数优化方法,研究了制件成形过程中拉延摩擦系数f_(1)、反拉延摩擦系数f_(2)、拉延压边力Q_(1)和反拉延压边力Q_(2)对减薄率T_(min)和T_(max)的影响。结果表明:增大拉延圆角后,消除了材料因弯曲与反弯曲变形流入过慢导致的开裂现象;优化切边线后,减少了材料因各向异性导致的“凸耳”现象。采用正交试验设计的均值差分析工艺参数优化,获得影响T_(mi n)和T_(max)因素的主次关系为f_(1)>Q_(1)>f_(2)>Q_(2),最优工艺参数组为f_(1)=0.200、f_(2)=0.100、Q_(1)=60 kN和Q_(2)=40 kN,减薄率为T_(min)=-0.1303、T_(max)=0.1404,制件无开裂与起皱现象且成形质量得到进一步提升。得出结论:该方法对制件成形工艺的质化与量化调整具有一定的工程应用价值。
In order to control the multi-step stamping quality of deep cylindrical parts,the effects of drawing friction coefficient f_(1),reverse drawing friction coefficient f_(2),drawing blank holder force Q_(1) and reverse drawing blank holder force Q_(2) on thinning rates T_(min) and T_(max) were studied by using the optimization of forming simulation process scheme and the optimization of process parameters by means of mean difference analysis of orthogonal experimental design.The results show that the cracking phenomenon caused by the slow inflow of bending and reverse bending deformation is eliminated after increasing the drawing fillet;after optimizing the trimming line,the"lug"phenomenon caused by anisotropy is reduced.Through the mean difference analysis of orthogonal experimental design and process parameter optimization,it is obtained that the primary and secondary relationship of the factors affecting T_(min) and T_(max) is f_(1)>Q_(1)>f_(2)>Q_(2),the optimal process parameter groups are f_(1)=0.200,f_(2)=0.100,Q_(1)=60 kN,Q_(2)=40 kN,and the thinning rate is T_(min)=-0.1303 and T_(max)=0.1404.The parts have no cracking and wrinkling,and the forming quality has been further improved.It is concluded that this method has good engineering application value for the qualitative and quantitative adjustment of part forming process.
作者
胡李勇
王利
王雷
王锐
HU Liyong;WANG Li;WANG Lei;WANG Rui(School of Mechanical and Automotive Engineering,Xuancheng Vocational and Technical College,Xuancheng,Anhui 242000,China;Ma′anshan Engineering Technology Research Center for Advanced Design of Automobile Stamping Dies,Wanjiang University of Technology,Ma′anshan,Anhui 243031,China;School of Automotive Engineering,Weifang Vocational College,Weifang,Shandong 262737,China)
出处
《西昌学院学报（自然科学版）》
2022年第2期50-54,共5页
Journal of Xichang University(Natural Science Edition)
基金
安徽省高校自然科学研究项目(KJ2019A1140、KJ2020A0837)
马鞍山市工程技术研究中心开放基金项目(QMSG202102、QMSG202103)。
关键词
深筒形制件
多步冲压成形
正交试验
均值差
deep cylindrical parts
multi-step stamping
orthogonal experiment
mean difference
