基于固体颗粒介质成形工艺筒形件拉深力学分析  

Mechanical Analysis of Deep Drawing of Cylinder Based on Solid Granules Medium Forming Technology

作　　者：曹秒艳[1] 赵长财[2] 董国疆[2,3] 郝海滨[2] 

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,秦皇岛066004 [2]先进锻压成形技术与科学教育部重点实验室(燕山大学),秦皇岛066004 [3]燕山大学车辆与能源学院,秦皇岛066004

出　　处：《机械工程学报》2013年第2期42-48,共7页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50775197);秦皇岛市科技支撑计划(2012021A094)资助项目

摘　　要：将固体颗粒介质成形工艺应用于金属板材圆筒件的拉深成形,建立相应的板材拉深力学模型。在固体颗粒传力衰减模型的基础上,通过对工件直壁区的力学分析,得到拉深过程中所需压头单位压力的函数关系式。该关系式表明,当筒形件的直壁段成形后,随着拉深系数的增加,压头最大单位压力呈线性逐渐减小;板材与凹模表面间摩擦因数增大将导致压头单位压力加大,并且该增加趋势非常明显;颗粒介质与板材之间的摩擦因数增大却可以减小压头单位压力;随着颗粒介质初始装料高度的增加,压头单位压力相应增加,这是颗粒介质所传递的应力随传递距离增加而逐渐衰减的结果。并以镁合金板材为研究对象,进行基于颗粒介质成形工艺的拉深试验和有限元模拟验证。研究结果表明,试验、模拟结果与理论值基本吻合。Solid granule medium forming（SGMF） technology is applied to the deep drawing for cylinders of sheet metal, and the corresponding mechanical model under this condition is established. On the basis of the pressure-transfer attenuation model, the formula of desired unit punch pressure during the forming process has been obtained through mechanical analysis on the straight wall zone, which demonstrates that after the straight wall zone of the cylinder comes into being, the maximum unit punch pressure will linearly decrease gradually with the drawing coefficient increases; it also turns out that increment of friction coefficient between the sheet and the female die surface will result in a quite obvious tendency of increase in unit punch pressure; nevertheless, increment of that between the sheet and the solid granule medium will otherwise minish the unit punch pressure. Furthermore, with the increasing of the initial medium loading height, the unit punch pressure increases, which is resulted from the gradual attenuation of stress transfered by granule medium with the transferring distance grows. Additionally, magnesium alloy sheet as subject investigated, the deep drawing experiment and finite element simulation based on SGMF technology have been conducted, which has verified that the experimental and simulation results are in good agreement with the theoretical one.

关 键 词：固体颗粒介质成形 拉深 圆筒形件 

分 类 号：TG156[金属学及工艺—热处理]