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摘要：
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针对飞机蒙皮拉形生产中模具更换耗时久、自动化程度低以及拉形设备频繁停机等待等缺点，设计了一种基于“双工位”思想的模具快速更换系统。该模具快速更换系统将模具更换工作移至准备区内进行，在模具更换期间可以同步进行其他批次蒙皮零件的拉形工作。该系统具有结构简单、模具更换快捷、自动化程度高等优点，显著提高了蒙皮拉形生产的工作效率。针对移动工作台顶升过程中存在的偏载问题，设计了一种基于PWM控制的液压同步顶升系统。利用AMESim软件建立了液压同步顶升系统的仿真模型，仿真结果表明，该液压同步顶升系统的同步控制精度高于预期设计目标，满足了移动工作台顶升过程中的位移同步控制要求。
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A rapid die replacement system based on the double station concept was designed to overcome the defects in the aircraft skin stretch forming production, such as a long die replacement time, low degree of automation and frequent shutdown of stretch forming machine. This rapid die replacement system moved the die replacement work into the preparation area, and the stretch forming work of other batches of skin parts was conducted synchronously during the die replacement period. Therefore, this system presented a series of advantages, like simple structure, high efficiency of die replacement and high degree of automation, and the work efficiency of skin stretch forming production was improved significantly. Furthermore, for the problem of unbalance loading in the jack-up process of moving worktable, a hydraulic synchronous jack-up system based on PWM control was designed, and the simulation model of hydraulic synchronous jack-up system was established by software AMESim. The simulation result shows that the synchronous control accuracy of the hydraulic synchronous jack-up system is higher than the expected design goal, and the requirements of displacement synchronous control in the jack-up process of moving worktable are met.
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基金项目：
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四川省重点研发项目(2018GZ0063)
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作者简介：
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吕常伟（1994-），男，硕士研究生，E-mail：1621413847@qq.com；通讯作者：罗大兵（1973-），男，博士，副教授，E-mail：dbluo@swjtu.edu.cn
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