摘要
在六面顶压机中,卸压过程控制是合成高性能超硬材料的关键环节,但电磁阀通断控制、步进电机控制等传统控制方式存在卸压过程不连续、线性度不佳等问题,难以满足装备高质量性能和合成稳定性等要求。分析超高压卸压阀的结构组成和原理,明确了技术关键为锥型阀芯和阀座之间间隙的动态精准控制措施;结合伺服电机扭矩—转速特性,论证了将伺服控制技术应用于六面顶压机超高压卸压环节的可行性。设计了硬件控制系统,开发了软件,形成由可编程逻辑控制器(PLC)、伺服控制系统、高精度压力传感器组成的闭环伺服控制系统,构建PID控制算法及流程,实现了六面顶压机的超高压卸压的精准控制。试验测试结果表明:伺服控制技术能在0.01~0.5 MPa/s的宽范围内实现线性控制,实际卸压速度曲线与工艺卸压速度曲线重合率达到95%以上,安全可靠、性价比高,更有利于高性能超硬材料的合成。
In the cubic press,the pressure relief process control is the key link to synthesize the high-performance super-hard materials,but the traditional control methods such as solenoid valve on-off control and stepping motor control have problems such as discontinuous pressure relief process and poor linearity,which are difficult to meet the requirements of equipment high performance and synthesis stability.By analyzing the structure and principle of the ultra-high pressure relief valve,it is clear that the dynamic and precise control measures of the gap between the conical valve core and the valve seat is the key to the technology.Combined with the torque-speed characteristics of servo motor,the feasibility of applying servo control technology to the ultra-high pressure relief link of cubic press is demonstrated.Combining hardware control system and software development,a closed-loop servo control system composed of Programmable Logic Controller(PLC),servo control system and high-precision pressure sensor is formed,and the PID control algorithm and the flow chart are constructed,thus realizing the ultra-high pressure relief precise control on the cubic press.The test results show that the servo control technology can realize linear control in a wide range of 0.01~0.5 MPa/s,and the coincidence rate between the actual pressure relief speed curve and the process pressure relief speed curve is over 95%,which is safe,reliable and cost-effective,and is more conducive to the synthesis of high-performance super-hard materials.
作者
张跃亭
王跃桦
曹阳
王永峰
孙冠男
赵盟月
ZHANG Yueting;WANG Yuehua;CAO Yang;WANG Yongfeng;SUN Guannan;ZHAO Mengyue(Zhengzhou Research Institute for Abrasives&Grinding Co.,Ltd.,Zhengzhou 450001,China)
出处
《工业技术创新》
2021年第5期120-124,共5页
Industrial Technology Innovation
基金
郑洛新自创区产业集群专项(201200210900)
郑州市重大科技创新专项(2019CXZX0058)
关键词
伺服控制技术
卸压阀
六面顶压机
高性能超硬材料
可编程逻辑控制器(PLC)
Servo Control Technology
Pressure Relief Valve
Cubic Press
High-Performance Super-Hard Material
Programmable Logic Controller(PLC)
