铝合金外螺旋面挤压成形数值模拟及试验研究  

Numerical Simulation and Experimental Study on Extrusion Forming of Aluminum Alloy External Spiral Surface

作　　者：刘厚根[1] 夏峰 赵贝贝 LIU Hougen;XIA Feng;ZHAO Beibei(School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China)

机构地区：[1]中南大学机电工程学院

出　　处：《热加工工艺》2018年第7期136-140,共5页Hot Working Technology

基　　金：国家高性能复杂制造国家重点实验室项目(zzyjkt2014-09);湖南省科技厅重点研发计划项目(2015GK3006)

摘　　要：针对大螺距、大螺旋角铝合金外螺旋面（像罗茨机械增压器转子）的成形,本文提出了一种正向热挤压成形工艺。以铝合金6063为例,利用Deform-3D有限元数值模拟软件建立了铝合金外螺旋面挤压模型,并模拟了外螺旋面的挤压成形过程。分析了挤压温度、挤压速度、挤压比和毛坯长度等工艺参数对外螺旋面挤压成形的影响,并根据数值模拟结果进行了相应的挤压试验。结果表明：铝合金外螺旋面表面光洁,齿形填充饱满,长度方向上螺旋角分布均匀;大螺距、大螺旋角的铝合金外螺旋面的挤压成形工艺是可行的。Aiming at forming of aluminum alloy external spiral surface（like Roots mechanical supercharger rotor） with large flight lead and big helix angle, a forward hot extrusion forming process was put forward. Taking aluminum alloy 6063 as an example, the external helical extrusion model of aluminum alloy was established by using Deform-3 D finite element numerical simulation software. And the extrusion forming process of external helical surface was simulated. The influences of extrusion temperature, extrusion speed, extrusion ratio and blank length on external helical extrusion forming were analyzed.The corresponding extrusion tests were carried out according to the numerical simulation results. The results show that the external spiral surface of the aluminum alloy is smooth, the toothed fill is full, and the helix angle in the length direction is uniformly distributed; the extrusion process of aluminum alloy external spiral surface with large flight lead and big helix angle is feasible.

关 键 词：铝合金 外螺旋面 热挤压 数值模拟 挤压试验 

分 类 号：TG379[金属学及工艺—金属压力加工]