基于RSM的铝合金大锻件局部加载成形质量控制
发布时间：2018-09-13 05:51
【摘要】：为解决局部加载条件下铝合金大型锻件成形过程中微观组织不均匀与过渡区筋部充填不满的问题,借助于响应面法(RSM)与数值模拟相结合的策略对锻件局部加载成形工艺进行研究。以锻件微观组织均匀性和填充性作为质量评价目标,建立坯料温度、压力机速度、上模斜角角度、道次与质量指标之间的关系模型,并得到合理的工艺参数:坯料温度为440℃,压力机速度为10 mm/s,上模斜角角度为158°,3道次成形,各道次压下量分别为20,20和5 mm,将得到的工艺参数进行再模拟并应用于生产试制。对生产试制得到的锻件的典型截面进行组织观察。研究结果表明:模拟和实际生产的锻件微观组织均匀,分布规律一致,且锻件均充填完整,所提出的策略能有效对大型锻件局部加载成形宏、微观质量进行控制。
[Abstract]:In order to solve the problem of uneven microstructure and defect of reinforcement filling in transition zone during the forming process of large aluminum alloy forgings under local loading conditions, The local loading forming process of forgings was studied by means of response surface method (RSM) and numerical simulation. Taking the microstructure uniformity and filling property of forgings as the quality evaluation target, the relationship model between blank temperature, press speed, upper die angle, pass number and quality index is established. The reasonable technological parameters are obtained: the blank temperature is 440 鈩，
本文编号：2240270
[Abstract]:In order to solve the problem of uneven microstructure and defect of reinforcement filling in transition zone during the forming process of large aluminum alloy forgings under local loading conditions, The local loading forming process of forgings was studied by means of response surface method (RSM) and numerical simulation. Taking the microstructure uniformity and filling property of forgings as the quality evaluation target, the relationship model between blank temperature, press speed, upper die angle, pass number and quality index is established. The reasonable technological parameters are obtained: the blank temperature is 440 鈩，
本文编号：2240270
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