基于PLC的多模式液压夹紧装置控制系统设计

Design of multi-mode hydraulic clamping device based on PLC

以提高液压夹紧装置的控制适应性为目标,设计了一种基于PLC的多模式液压夹紧装置及控制系统。首先,以液压缸、换向阀、储能器为硬件核心完成了夹紧装置的系统设计,并利用AMESim绘制了液压系统原理图。其次,通过压力传感器、比例反馈换节搭建了多模式控制系统,在对夹紧对象所受压力进行自动实时检测的同时,通过对比例反馈环节实现对储能器的有效控制保持加紧压力,提高夹紧装置的可靠性。最后,以FX2N系列PLC为控制核心进行了I/O分配并进行了程序设计,绘制了控制系统的基本功能流程图。本研究通过PLC对液压系统的有效控制,增强了夹紧装置的适用性。

In order to improve the control adaptability of hydraulic clamping device,a multi-mode hydraulic clamping device and control system based on PLC were designed.Firstly,the system design of the clamping device is completed with hydraulic cylinder,reversing valve and accumulator as the hardware core,and the schematic diagram of the hydraulic system is drawn by AMESim.Secondly,an adaptive control system is built by means of pressure sensor and proportional feedback node change.While the pressure on the clamping object is automatically and real-time detected,the energy accumulator is effectively controlled to maintain the tightening pressure through the proportional feedback link,so as to improve the reliability of the clamping device.Finally,I/O assignment and program design are carried out with FX2N series PLC as the control core,and the feasibility of the control program is verified by system simulation.In this study,the applicability of the clamping device is enhanced by the effective control of the hydraulic system by PLC.