铝合金与静音钢异种材料匹配无铆钉铆接成形特性
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摘要
无铆钉铆接以其无热入、自动化程度高等优势成为异种材料连接的重要手段之一,已在汽车工业得到广泛应用。通过实验方法,研究了铝合金与静音钢这一特殊异种材料匹配的无铆钉铆接接头成形机理。结合成形过程力-位移曲线和接头各阶段断面宏观形貌,将无铆钉铆接接头成形过程分为三个阶段,并具体分析了接头形貌特征的演化规律,得到了特定模具匹配下的最优压入深度参数。通过不同模具匹配实验,研究了凸模铆头直径和凹模沉孔深度对接头几何形貌的影响规律,为工艺优化提供借鉴。
As a crucial method of dissimilar material connections,the clinching with its advantages as no heat input and high-level automation,has been widely applied in the automotive industry. In this paper,the forming mechanism of clinch joining for a special match of aluminum alloy and quiet steel was studied by lots of experiments. Combined with the force-displacement curve and the observation of macroscopic joint shape,the deformation behavior could be divided into three stages. The evolution of joint features was specifically analyzed and the optimum press depth under such molds was also obtained. Moreover,the influence of rivets diameter and die depth on the main geometrical parameters of joints was studied by different die matching experiments,which provided some reference for the process optimization.
As a crucial method of dissimilar material connections,the clinching with its advantages as no heat input and high-level automation,has been widely applied in the automotive industry. In this paper,the forming mechanism of clinch joining for a special match of aluminum alloy and quiet steel was studied by lots of experiments. Combined with the force-displacement curve and the observation of macroscopic joint shape,the deformation behavior could be divided into three stages. The evolution of joint features was specifically analyzed and the optimum press depth under such molds was also obtained. Moreover,the influence of rivets diameter and die depth on the main geometrical parameters of joints was studied by different die matching experiments,which provided some reference for the process optimization.
引文
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[12]何玉林.金属板料无铆钉自冲铆接成形规律的研究[D].桂林:桂林电子科技大学,2009.
[2]曹伟,李国林,李宏华,等.静音钢板前围板的轻量化应用及噪音性能研究[J].农业装备与车辆工程,2011(2):20-22.
[3]QIU R F,IWAMOTO C,SATONAKA S.Interfacial reaction layer in resistance spot welded joint between aluminium alloy and austenitic stainless steel[J].Materials Science&Technology,2013,26(2):243-246.
[4]徐正昭.无铆钉连接成形规律及其工艺研究[D].桂林:桂林电子科技大学,2014.
[5]冯玉涛,赵卯,单红,等.无铆钉铆接技术在轿车白车身制造中的应用研究[J].汽车工艺与材料,2014(8):1-8.
[6]VARIS J P,LEPISTJ.A simple testing-based procedure and simulation of the clinching process using finite element analysis for establishing clinching parameters[J].Thin-Walled Structures,2003,41(8):691-709.
[7]宁农,欧阳可居,于立强.汽车金属板件压接工艺研究[J].锻压技术,2004,29(4):26-29.
[8]周云郊,兰凤崇,黄信宏,等.钢铝板材压力连接模具几何参数多目标优化[J].材料科学与工艺,2011,19(6):86-93.
[9]陈兴茂.无铆钉铆接的工艺研究[D].南京:华东交通大学,2008.
[10]ABE Y,MORI K,KATO T.Joining of high strength steel and aluminium alloy sheets by mechanical clinching with dies for control of metal flow[J].Journal of Materials Processing Tech,2012,212(4):884-889.
[11]LEE C J,KIM J Y,LEE S K,et al.Design of mechanical clinching tools for joining of aluminium alloy sheets[J].Materials&Design,2010,31(4):1854-1861.
[12]何玉林.金属板料无铆钉自冲铆接成形规律的研究[D].桂林:桂林电子科技大学,2009.