【作者】 杨帆；

【导师】 宋锦春；

【作者基本信息】 东北大学 ， 机械电子工程， 2020， 硕士

【摘要】 在近年来,我国越来越重视制造业,中国制造2025的提出更是推进了制造前进的脚步。旋压是薄壁回转体零件加工最有优势的选项,其产品广泛应用在多个领域内。无芯模旋压取代了传统普通旋压的必要芯模,不依赖芯模形状以灵活加工复杂母线的工件,是最近兴起的一种新型旋压模式。本文围绕着一种无芯模液压旋压机展开,设计能实现无芯模旋压的旋轮结构,并实现电液驱动以及相关控制研究。论文主要研究内容包括:(1)通过查阅相关文献,明确普通旋压和无芯模旋压的原理和差异。了解近几年在普通旋压和无芯模旋压的相关研究,特别是无芯模旋压的结构实现形式。同时了解对电液伺服比例系统的控制策略,为后续设计与控制提供思路。(2)针对无芯模旋压设计能实现功能的旋轮机构,利用有限元对主要受力件旋轮座进行了有限元分析优化,进行了静力学分析确定达到了使用要求。同时做了其轻量化优化和动力学模态分析,设计时避免共振。(3)完成旋轮机构的结构设计后设计驱动其动作的液压系统,对旋轮机构整体的转动转角采用电液伺服比例控制方案。(4)通过结构特点,将转角的控制转化为液压缸位移的控制,建立电液伺服比例系统的数学模型,主要有非线性微分方程构成,通过Simulink搭建系统的非线性模型,并确定系统稳定。(5)对建立的电液伺服比例闭环位置控制系统进行相关控制策略的研究,使用模糊PID和带调整因子的模糊PID改善系统响应性能。通过对比带自整定因子的模糊PID效果最好。(6)利用液压实验台和计算机采集控制系统进行实验,得到所设计控制器的控制效果,验证了相关结论的正确。设计的旋轮机构能够实现无芯模旋压的功能,不改变变形下减轻了旋轮座的质量,其频率与液压系统频率不同,不会共振。通过优化设计的控制器改善电液控制系统的响应,确保了旋压的高精度加工。更多还原

【Abstract】 In recent years,China has paid more and more attention to manufacturing industry,and the proposal of Made-in-China 2025 promotes the development of manufacturing.Spinning is the most convenient form of processing for thin-walled rotating parts.Coreless die spinning,which replaces the necessary core die of conventional spinning,is a new type of spinning mode,it does not depend on the shape of core die to process complex busbar flexibly.This paper focuses on a kind of coreless hydraulic spinning machine,designs the structure of the spinning wheel which can realize coreless spinning,and realizes the electro-hydraulic drive and related control research.The main contents of this paper include:(1)By consulting relevant literature,the principle and difference of ordinary spinning and coreless die spinning are clarified.Understand the recent research on common spinning and coreless die spinning,especially the structure of coreless die spinning.At the same time,the control strategy of electro-hydraulic servo proportional system is understood to provide ideas for subsequent design and control.(2)For coreless die spinning,a mechanism of spinning wheel is designed to realize the function.Finite element analysis and optimization of the main stress components,namely the spinning wheel seat,are carried out by using the finite element method.The purpose is to ensure that the strength meet the qualification.At the same time,its lightweight optimization is done.Dynamic modal analysis aims at avoiding resonance in design.(3)After the structural design of the rotating wheel mechanism is completed,the hydraulic system driving its action is designed,and the electro-hydraulic servo proportional control scheme is adopted to control the rotating angle of the whole rotating wheel mechanism.(4)According to the structural characteristics,the control of rotation angle is transformed into the control of displacement of hydraulic cylinder,and the mathematical model of electro-hydraulic servo proportional system is established,which mainly consists of non-linear differential equation.The non-linear model of the system is built by Simulink,and make sure the system is stable..(5)The relevant control strategy of the electro-hydraulic servo proportional closed-loop position control system is studied,and the response performance of the system is improved by using fuzzy PID and fuzzy PID with adjusting factor.The effect of fuzzy PID with self-tuning factor is the best..(6)The control effect of the designed controller is obtained by using the hydraulic test-bed and the computer acquisition and control system,and the correctness of the relevant conclusions is verified.The designed rotating wheel mechanism can realize the function of coreless die spinning without changing the mass of the spinning wheel seat under deformation.Its frequency is different from that of the hydraulic system,and it will not resonate.The designed controller improves the response of the electro-hydraulic control system and the spinning accuracy.This paper is based on the project of Engineering practice,which not only serves the engineering practice,but also has the corresponding theoretical guidance,and has certain research significance.更多还原