独立导向四柱式精冲实验压力机的结构分析及系统设计

发布时间：2019-02-16 15:45

【摘要】：近年来,精冲工艺技术越来越广泛地应用于汽车零部件的制造中,精冲技术的研究也是塑性成形研究领域中的热点,但目前没有专门用于科学技术研究的专业精冲实验压力机。为了更好地服务于教学和科研,以目前学校现有的一台精冲液压模架为基础,研发一台强刚度、高精度的独立导向四柱式精冲实验压力机,为精冲技术的教学、科研提供实验平台。本文首先通过对现有的精冲液压模架结构和电液系统进行详细的介绍和分析,根据现有的液压精冲模架的结构特点以及动作工艺,提出了一种四柱独立导向、上下横梁四柱式结构,三个动力和运动独立调制、能自动检测力和位移的专用精冲实验机总体方案。其次,运用UG软件建立该独立导向四柱式精冲实验压力机结构三维模型,分别从315T额定加载和350T最大载荷两个方面,运用有限元分析软件ANSYS模拟分析,得到不同载荷情况下的整机结构变形数据,对该整机主要结构的刚度以及可靠性做了分析总结。根据科研实验的需求,不仅开发了整套控制系统,可以实现自动和手动两种控制,且分别设计选购了直线位移传感器和液压压力传感器,利用电液比例控制,通过数字信号和电流信号的转换,并用可控编程器西门子S7系列PLC编制程序,达到对主缸压力和精冲位移进行实时监测的目的。最后,设计了实验压力机上横梁、立柱、下横梁部分结构的生产加工工艺,并参与指导企业制造出了独立导向四柱式精冲实验压力机。通过对独立导向四柱式压力机结构的模拟分析,整机刚度以及强度符合研发要求,并且结构简单,造价相对低廉,满足了精冲领域实验研究的需要。为精冲技术的进步做出了一定的贡献,对四柱式精冲机的市场研发也能够提供很大的工程参考价值。
[Abstract]:In recent years, fine blanking technology is more and more widely used in the manufacture of automobile parts. The research of precision blanking technology is also a hot spot in the field of plastic forming research, but there is no specialized precision punching experimental press for scientific and technological research at present. In order to better serve the teaching and scientific research, based on the existing hydraulic die frame of the school at present, we have developed an independent four-column precision punching experimental press with strong stiffness and high accuracy, which is the teaching of precision punching technology. Scientific research provides experimental platform. This paper firstly introduces and analyzes the structure and electro-hydraulic system of the existing precision punching hydraulic die holder in detail. According to the structural characteristics and action technology of the existing hydraulic precision stamping die frame, a four-column independent guide is proposed. The overall scheme of a special precision punching machine with four columns of upper and lower beams and three independent dynamic and motion modulations, which can automatically detect the force and displacement. Secondly, the three-dimension model of the independent four-column precision punching press is established by using UG software. The finite element analysis software ANSYS is used to simulate the structure of the press from the aspects of 315T rated load and 350T maximum load, respectively. The deformation data of the whole machine structure under different loads are obtained, and the stiffness and reliability of the main structure are analyzed and summarized. According to the demand of scientific research experiment, not only the whole control system is developed, but also the automatic and manual control can be realized. The linear displacement sensor and hydraulic pressure sensor are designed and purchased, and the electro-hydraulic proportional control is used. Through the conversion of digital signal and current signal and the programming of Siemens S7 series PLC, the main cylinder pressure and precision blanking displacement can be monitored in real time. Finally, the production and processing technology of the upper beam, column and lower beam structure of the experimental press is designed, and the independent guiding four-column precision punching experimental press is manufactured. Through the simulation and analysis of the structure of the independent steering four-column press, it is found that the stiffness and strength of the whole machine meet the requirements of research and development, and the structure is simple and the cost is relatively low, which meets the needs of the experimental research in the field of precision blanking. It has made a certain contribution to the progress of precision punching technology, and can also provide great engineering reference value for the market research and development of four-column precision punching machine.
【学位授予单位】：重庆理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG385.1

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