The invention provides a pipeline all-position
laser and arc combined
welding system. The pipeline all-position
laser and arc combined
welding system comprises a
laser sensor, an
image processing computer, a controller, an
actuator and a guard plate. The
laser sensor is used for collecting first position image information and second position image information of a
welding seam; the
image processing computer is used for calculating the transverse deviation and the longitudinal deviation of the welding seam according to the first position image information and the second position image information; the transverse deviation is transformed into a transverse deviation
voltage, the longitudinal deviation is transformed into a longitudinal deviation
voltage, and after
delay calculation is conducted according to the preact
delay quantity, the transverse deviation
voltage and the longitudinal deviation voltage are sent to the controller; the controller is used for correcting the transverse deviation according to the transverse deviation voltage and correcting the longitudinal deviation according to the longitudinal deviation voltage; the
actuator is used for controlling a combined
welding torch and the welding seam to be maintained in an accurate centering state according to the corrected transverse deviation and the corrected longitudinal deviation, and then welding is conducted; the guard plate is used for preventing welding spatter from polluting a focusing lens of the laser
welding torch to protect a lens, the pressure intensity of a laser
welding torch protection gas curtain is lowered, and the welding quality is ensured.