伺服控制跟踪在螺旋焊管生产线上的应用

Development of Plasma Cutting Tracking Device for Spiral Welded Pipe

薄壁螺旋焊管定长切割多数采用机械刀轮跟踪,往往存在切口不齐的问题。设计了一套用于螺旋焊管机的等离子切割跟踪装置,该系统由两路测速传感器、直流伺服电机、齿轮减速器、双丝杠螺母驱动的带有等离子切割喷枪的小车组成,通过调节伺服控制脉冲频率与所需送板速度之间的比例关系、送板速度与小车前进速度之间的比例关系,使切割小车与钢管伸长同步。测试结果表明,伺服跟踪误差小于1cm,远小于机械刀轮跟踪1cm^3cm的误差。

A knife flywheel is generally used in steel pipe cutting, an uprightness incision is not available. A set of plasma cutting tracking device for spiral pipe is developed. This system is composed of two speed sensors, DC servo motor, gear retarder, a vehicle with plasma gun drove by double screw and nut. Using this system regulates the velocity ratio of vehicle to plate, to make the vehicle moving at the same speed of pipe extension. Experiment results show the error of servo tracking is less than themechanical tracking, the former is below 1 em and the latter is 1 cm--3 cm.