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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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参考文献：
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[1]于成龙, 李东升, 李小强, 等. VTL1000型数控蒙皮拉形机运动仿真系统[J]. 计算机集成制造系统, 2012, 18(1): 87-88.
Yu C L, Li D S, Li X Q, et al. Motion simulation system for VTL1000 skin stretch forming machine[J]. Computer Intergrated Manufacturing System, 2012, 18(1): 87-88.
[2]张彦敏, 周贤宾. 飞机蒙皮拉伸成形工艺参数优化[J]. 航空学报, 2006, 27(6): 1203-1208.
Zhang Y M, Zhou X B. Parameter optimization in aircraft skin stretch forming process[J]. Acta Aeronautica et Astronautica Sinica, 2006, 27(6): 1203-1208.
[3]王晓欣, 曾一畔, 陈林, 等. 复杂曲率蒙皮零件拉形工艺分析及优化[J]. 锻压技术, 2018, 43(9): 88-92.
Wang X X, Zeng Y P, Chen L, et al. Process analysis and optimization on stretch forming of complex curvature skin part[J]. Forging ＆ Stamping Technology, 2018, 43(9): 88-92.
[4]陈浩, 曲中兴, 张立武. 高强度铝合金坯料残余应力抑制消除技术及发展趋势[J]. 航天制造技术, 2016, (5): 5-9, 20.
Chen H, Qu Z X, Zhang L W. Residual stress control and relief technology in high strength aluminum alloy and it′s development trends[J]. Aerospace Manufacturing Technology, 2016, (5): 5-9, 20.
[5]王旭, 朱新庆. 机械压力机移动工作台的液压夹紧顶起回路分析[J]. 液压气动与密封, 2005, (4): 24-25.
Wang X, Zhu X Q. Analyze the hydraulic clamp and lift circuits in the moving platform of mechanical press[J]. Hydraulics Pneumatics & Seals, 2005, (4): 24-25.
[6]鲁鼎. 多液压缸同步控制技术的研究[D]. 镇江: 江苏科技大学, 2013.
Lu D. Study on Synchronous Control Technology of Multiple Hydraulic Cylinders[D]. Zhenjiang: Jiangsu University of Science and Technology, 2013.
[7]龚剑, 李增辉, 施雯钰, 等. 整体钢平台模架装备液压同步顶升性能分析[J]. 建筑施工, 2014, 36(4): 378-389.
Gong J, Li Z H, Shi W Y, et al. Analysis of synchronized jacking performance of scaffolding system with integral steel platform[J]. Building Construction, 2014, 36(4): 378-389.
[8]何谦. 基于高速开关阀的液压同步控制系统设计与研究[D]. 长沙: 湖南师范大学, 2008.
He Q. Design and Research of Hydraulic Synchronous Control System Based on High Speed on-off Valve[D]. Changsha: Hunan Normal University, 2008.
[9]周重威, 杨自建, 汤关荣. PWM液压控制多点同步顶升系统设计[J]. 机电工程, 2013, 30(1): 32-34
Zhou Z W, Yang Z J, Tang G R. Hydraulic multi-point synchronized lifting system based on PWM[J]. Journal of Mechanical & Electrical Engineering, 2013, 30(1): 32-34
[10]付永领, 祁小野. LMS Imagine.Lab AMESim系统建模和仿真参考手册[M]. 北京: 北京航空航天大学出版社, 2011.
Fu Y L, Qi X Y. LMS Imagine.Lab AMESim Modeling and Simulation of System Reference Manual[M]. Beijing: Beihang University Press, 2011.
[11]白云华, 张晓明, 程爱学. 磨机多点同步顶升系统的设计与仿真[J]. 矿山机械, 2016, (4): 43-46.
Bai Y H, Zhang X M, Cheng A X. Design and simulation of multi-point synchronous jacking system of mill[J]. Mining & Processing Equipment, 2016, (4): 43-46.
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