【摘要】 原移动式钢轨气压焊控制系统是以PLC为核心,通过4台直流减速电机进行控制的,由电机1的正反转来控制压力的大小,电机2的正反转来控制顶锻液压缸往返动作,电机3的正反转来控制推瘤液压缸往返动作,电机4则是控制加热器的摆动。但是原系统采用DDM表进行数据采集和显示,抗干扰能力差,经常出现死机的现象;采用调压电机带动锥形阀阀体旋转控制压力,旋转时响应速度慢、精度低,有时会出现失控状态。针对原移动式钢轨气压焊控制系统存在的一些问题,采用触摸屏代替DDM表、换向阀和比例溢流阀代替直流电机拖动,使得可靠性明显提高,响应速度加快,具有广泛应用前景。更多还原

【Abstract】 In the original control system,which based on PLC,there was 4 DC deceleration electric motors:the first electric motor is used to control the pressure of hydraulic system,the second controls the reciprocation of hydraulic cylinder for forging,the third controls the reciprocation of hydraulic cylinder for eliminating weld bead,the fourth controls the swing of heater. DDM(Digital display and memory instrument)is used for data acquisition and display,whose anti-interference capability is poor,and sometimes make the control system crash.The pressure of system is regulated through conical valve rotation,which is drived by a electromotor,but the respond speed of rotation was poor,and sometimes it is out of control.For these problems mentioned above,the new control system takes touch -screen instead of DDM,valve and proportional relief valve instead of electrical motors.This new system is in good reliability,in faster respond speed, being with better prospect.更多还原