铝合金排材挤压工艺仿真模拟研究

Sim-Study on Extrusion Process of Aluminum Alloy Strips

为了优化高强度铝合金排材的生产工艺,通过模具、工艺等要素分析,利用有限元仿真软件进行正交模拟试验研究。结果表明:当工作带长度为8 mm、导流深度为38 mm、挤压杆速为1.0 mm/s、铸锭温度为340℃时,挤压出口金属流速、温度最均匀,挤压内筒比压最小。利用该最优参数组合进行实际生产,挤出了合格的7075铝合金排材,证明了模拟结果的可靠性。

In order to optimize the extrusion process of high-strength aluminum alloy strips, the orthogonal simulation tests were carried out by using finite element software by analyzing the die and process factors. The results show that when the thickness of die bearing was 8 mm, the depth of the flow-guiding hole was 38 mm, the speed of extrusion rod was 1.0 mm/s and the temperature of billet was 340˚C, the metal flow rate and temperature of the extrusion strips were the most uniform, and the specific pressure of the extrusion inner cylinder was the lowest. The optimal parameter was used for the actual pro-duction, and the qualified 7075 aluminum alloy strips were extruded to prove the reliability of the simulation results.