薄壁管内推弯曲成形的液压系统设计

发布时间：2018-06-17 11:27

本文选题：弯管 + 液压伺服　；参考：《东北大学》2012年硕士论文

【摘要】：随着工业生产和科学技术的不断发展,管材的弯曲加工在金属结构、工程机械、石油化工、动力机械以及锅炉、轻工、航空航天、管道工程等工业部门,占有着越来越重要的地位,也对管材的加工技术提出了更高、更新的要求。这就使得对管材成形质量缺陷的控制和发展更先进的管材弯曲成形技术成为迫切需要解决的难题。另外随着电液比例控制技术的发展,电液比例控制技术已在液压控制中占有重要地位。同时,随着比例元器件的发展和计算机技术的广泛应用,比例阀的性能不断得到提高,比例阀在很多方面性能已与伺服阀相当。电液比例控制系统是基于比例控制技术上的液压控制系统。日前,一方面该类系统在理论上的分析及研究已有一定的基础,另一方面,由于控制机理上的复杂性,该类系统的理论还不够深入和全面。在工程应用中：如何把理论分析与工程实践系统地、有机地结合起来,保证系统达到有关技术要求,是一个意义深远的课题。本论文针对薄壁管的弯曲介绍了常用的弯曲加工方法和弯管设备,分析了国内外数控弯管机的现状及发展趋势；并探讨了数控弯管机中电液伺服系统的控制理论。通过对弯管工艺的分析,本文在研究弯管机工作原理和控制系统的基础上,研究设计了弯管系统的液压系统。对系统进行了数学建模并分析关键部位的运动状态,进行了matlab仿真。对系统采用闭环控制,利用PID控制使系统更加稳定快速。本论文对管材数控弯曲成形机理进行了较深入的研究,为实现薄壁管数控弯曲成形提供了有价值的参考,对大直径薄壁管材数控弯曲成形质量和成形效率的提高,以及数控弯管技术的发展,具有重要的理论和实际意义。
[Abstract]:With the continuous development of industrial production and science and technology, pipe bending processing in metal structure, construction machinery, petrochemical, power machinery and boiler, light industry, aerospace, pipeline engineering and other industrial sectors, More and more important position, also put forward the higher and newer request to the pipe processing technology. This makes the control of tube forming quality defects and the development of more advanced pipe bending forming technology become an urgent problem to be solved. In addition, with the development of electro-hydraulic proportional control technology, electro-hydraulic proportional control technology has played an important role in hydraulic control. At the same time, with the development of proportional components and the wide application of computer technology, the performance of proportional valve has been continuously improved, and the performance of proportional valve has been comparable to that of servo valve in many aspects. The electro-hydraulic proportional control system is a hydraulic control system based on proportional control technology. A few days ago, on the one hand, the theoretical analysis and research of this kind of system has been based on a certain degree, on the other hand, because of the complexity of the control mechanism, the theory of this kind of system is not deep and comprehensive enough. In engineering application, how to combine theory analysis with engineering practice systematically and organically to ensure that the system can meet the relevant technical requirements is a far-reaching subject. This paper introduces the common bending machining methods and pipe bending equipment for thin wall tube bending, analyzes the present situation and development trend of numerical control pipe bending machine at home and abroad, and discusses the control theory of electro-hydraulic servo system in numerical control pipe bending machine. Based on the analysis of the pipe bending technology, the hydraulic system of the pipe bending system is designed on the basis of studying the working principle and control system of the pipe bending machine. The mathematical model of the system and the motion state of the key position are analyzed, and the matlab simulation is carried out. Closed-loop control is used for the system and pid control is used to make the system more stable and fast. In this paper, the numerical control bending forming mechanism of tube is deeply studied, which provides a valuable reference for the realization of numerical control bending forming of thin-walled tube, and improves the quality and efficiency of numerical control bending forming of large diameter thin-walled tube. And the development of NC pipe bending technology has important theoretical and practical significance.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137

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