Laser welding device and method for steel cylinder concrete pipe machining

The invention discloses a laser welding device and method for steel cylinder concrete pipe machining, and the laser welding device comprises a plate placing device which is used for releasing a steel plate coil; a shearing device; the laser welding device is connected with the laser welding main machine, and the laser welding device is used for welding a bell mouth ring of the steel cylinder and a cylinder body of the steel cylinder, welding the cylinder body of the steel cylinder and welding a lap weld of a steel plate and a steel spigot ring; the water cooling device is connected with the laser welding main machine and used for cooling in the laser welding process; the main control module is respectively connected with the plate placing device, the core mold device, the laser welding host, the laser welding seam tracking system and the water cooling device. The invention aims to overcome the defects of at least one existing steel cylinder concrete pipeline adopting a semi-automatic submerged-arc welding pro