平砧连续拔长矩形截面毛坯的数值模拟  

Numerical simulation of continuous forging with flat anvils for rectangular crosssection billets

作　　者：倪利勇[1] 余江[1] 鄢奉林[1] 张永军[2] 刘助柏[3] 

机构地区：[1]广东海洋大学工程学院,湛江524088 [2]北京科技大学材料科学与工程学院,北京100083 [3]燕山大学机械工程学院,秦皇岛066004

出　　处：《机械设计与制造》2010年第10期222-223,共2页Machinery Design & Manufacture

基　　金：国家自然科学基金重点项目(59235101);广东省自然科学基金(8452408801001711);广东海洋大学博士科研基金(0612165)

摘　　要：对平砧锻造法进行了连续拔长过程的数值模拟。以前的研究仅仅给出了单次压下拔长模拟结果,忽略了上一次压下所产生的变形对后续压下的影响,这里采用ANSYS有限元分析软件对该锻造法实现了拔长一趟过程的数值模拟,并分析了锻件横截面上的中心轴线横向应力分布。分析结果表明:在使用普通平砧拔长时,在砧宽比为1.0和料宽比为0.5的条件下,坯料横截面上的其横向应力都是拉应力状态。并且随着拔长的进行,横向拉应力越来越大。这一点吻合了平砧拔长矩形截面毛坯的新理论,也表明了应用普通平砧锻造法时要注意控制横向拉应力。Numerical simulation is conducted for the flat anvil forging method.The forgoing research gave the simulation results of single blowing during stretching,and failed to pay attention to the influence of the deformation,resulting from the previous blowing,upon the next blowing.ANSYS software is adopted to simulate the through continuous blowing of the flat anvil forging method.The transversal stress distribution along the central axis on the crosssection of the stretched forging is analyzed.The simulation results show that during the stretching with flat anvils,when the ratio of the flat anvil width to the billet height is 1.0 and the ratio of the billet width to the billet height is 0.5,the transversal stress is tensile all the time,and increases as the stretching goes.The results verify the new theory of flat anvil stretching for rectangular crosssection billets and indicate that the transversal stress control should be paid attention to when the flat anvils are applied in stretching.

关 键 词：锻造 平砧 拔长 数值模拟 

分 类 号：TH116[机械工程—机械设计及理论] TG316[金属学及工艺—金属压力加工]