基于正交试验与信噪比分析的铝合金钳体支架压铸工艺参数优化  

Optimization of Die-casting Process Parameters of Aluminum Alloy Bracket Based on Orthogonal Experiment and SNR Analysis

作　　者：吴跃翔 康正阳 苏小平[1] WU Yuexiang;KANG Zhengyang;SU Xiaoping(School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816

出　　处：《热加工工艺》2023年第1期67-70,共4页Hot Working Technology

摘　　要：为了确定最优的A356铝合金钳体支架压铸工艺参数,本文综合运用成形过程数值仿真、Taguchi正交试验设计以及信噪比分析三种方法。以最小孔隙率和二次枝晶臂间距数值(SDAS)为优化目标,对关键压铸工艺参数实施优化,包括模具初始温度、铝液浇铸温度、冲头压射速度和模具保压压力。研究结果表明:优化的工艺参数组合为模具初始温度275℃,铝液浇铸温度630℃,冲头压射速度0.5m/s,模具保压压力50MPa。使用优化工艺参数组合能够减少钳体支架的内部缩孔缩松铸造缺陷。In order to determine the optimal die casting technological parameters of A356 alloy bracket, three methods,including numerical simulation of forming process, Taguchi orthogonal DOE(design of experiment) and signal to noise ratio analysis, were applied. Taking the minimum porosity and the secondary dendrite arm spacing(SDAS) as the optimization index, theoretical matching and optimization were carried out for the key die casting process parameters, including die initial temperature, aluminum liquid casting temperature, punch injection velocity and die holding pressure. The results show that the optimized process parameters are as follows: the initial die temperature is 275℃, the casting temperature is 630℃, the injection velocity is 0.5m/s, and the holding pressure is 50 MPa. Using optimization process parameter combination can reduce the shrinkage and porosity of the brackets.

关 键 词：压铸工艺参数 钳体支架 Taguchi方法 信噪比分析 

分 类 号：TG249.28[金属学及工艺—铸造]