管端扩径整圆自动控制技术与应用

针对螺旋埋弧焊管生产线钢管管端扩径整圆工序采用手动操作方式的现状，设计了一套管端整圆自动控制系统。该系统通过接近传感器检测辊道上钢管信号，结合PLC控制系统，通过程序逻辑运算，实现整圆过程中钢管在辊道.上自动运行；结合磁栅尺对整圆杆位移的精确定位，进而控制整圆杆自动扩径和缩回，进而实现自动整圆的功能。在触摸屏上设定两端整圆杆限位数值，可实现不同规格钢管整圆杆位移的精准定位。生产运行表明，该系统实现了钢管管端整圆过程的自动控制，降低了岗位人员劳动强度，并提高了钢管流程的输送效率。

Application of Diameter Expanding Automatic Control System of Pipe End

Aiming at the present situation that the pipe end expanding process of SAWH pipe production line adopts manual operation，an automatic control system for pipe end expanding is designed. The system detects the steel pipe signal on the roller by the proximity sensor，combines with the PLC control system，and realizes the automatic operation of the steel pipe on the roller during the expanding process through the program logic operation. Combined with the accurate positioning of the displacement of the expanding rod by the displacement magnetic sensor，the automatic diameter expansion and retraction of the expanding rod can be controlled，so as to realize the function of automatic expanding. Setting the limit value of the expanding rod at both ends on the touch screen can realize the accurate positioning of the displacement of the expanding rod of different specifications of steel pipes. The production operation shows that the system realizes the automatic control of the expanding process，reduces the labor intensity of the post personnel，and improves the conveying efficiency of the steel pipe process.