锻压技术

基于响应面法的喷射成形7055铝合金飞机轮毂锻造工艺优化

英文标题：Optimization on forging process for spray formed 7055 aluminum alloy aircraft wheel hub based on response surface method

作者：杨兴旺陶志伟袁凯黄瑶王雷刚

单位：江苏大学江苏豪然喷射成形合金有限公司

关键词：飞机轮毂喷射成形 7055铝合金热模锻预成形响应面法

分类号：TG319

出版年,卷(期):页码：2022,47(10):23-28

摘要：

针对由于飞机轮毂形状复杂而导致的轮毂锻件充填不完整和模具磨损等问题，在某型号飞机起落系统的轮毂锻造中，采用喷射成形7055铝合金挤压棒，并采用热模锻方式和增加锻件预成形设计，建立以锻件的终锻充填率和终锻力为优化目标、以坯料预锻压下量、坯料加热温度、模具预热温度和模具下压速度为设计变量的响应面模型。利用二阶响应面法与Design Expert软件相结合,对轮毂锻件的工艺参数进行优化，确定最佳参数为：坯料预锻压下量为45.30 mm、坯料预热温度为430 ℃、模具预热温度为447 ℃、模具下压速度为5.00 mm·s-1。生产验证表明，改进后的预成形方案与工艺参数可以在较低的终锻力下，解决充填不完整的问题，生产出合格的产品。

For the problems such as incomplete filling of wheel hub forgings and mold wear caused by the complex shape of aircraft wheel hub, in the wheel hub forging for a certain type of aircraft take-off and landing system, spray formed 7055 aluminum alloy extruded rod was used,and the hot die forging method was taken by adding a design of forgings preforming. Taking final forging filling rate and final forging force of forgings as the optimization goal and billet pre-forging reduction amount, billet heating temperature, mold preheating temperature and mold pressing speed as the design variables, the response surface model was established. Then, the process parameters of wheel hub forgings were optimized by the combination of the second-order response surface method and Design Expert software, and the optimal parameters were determined as the billet pre-forging reduction amount of 45.30 mm, the billet preheating temperature of 430 ℃, the mold preheating temperature of 447 ℃ and the mold pressing speed of 5.00 mm·s-1. The production verification shows that the improved preforming scheme and process parameters can solve the problem of incomplete filling and produce qualified products under the lower final forging force.

基金项目：

国家自然科学基金资助项目（51775249）

杨兴旺(1995－)，男，硕士研究生，E-mail：1286953517@qq.com；通信作者：王雷刚(1963－)，男，博士，教授，博士生导师，E-mail：lgwang@mail.ujs.edu.cn

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