Hydraulic Cylinder Inner Hole Overlaying Welding Machine 1. Welding Requirement To complete the automatic inner hole overlay welding of hydraulic cylinder. Make sure that the form is uniform and has a good appearance, depth of fusion and width of fusion meet the welding requirement, easy to clamp. Machine adopts MAG to finish the overlay welding of inner wall seam 2. Equipment Feature Welding torch moves forward-backward along with axis and welds workpiece. Workpiece is rotating, the welding position is horizontal. Machine has high voltage and slow wire feeding function, which guarantees reliable arc igniting. It also has low welding voltage and low current for filling crater. It adopts push type wire feeding mode to guarantee the stability of wire feeding. Welding torch can be adjusted longitudinal to suit for various welding type. Using PLC to control the whole operation. The rotation speed of workpiece is adjusted by A/C inverter, stepless adjustment, to improve the reliability of equipment. The welding mode and welding specification can be preset, saved and recalled. Via touch man-machine interface, the parameter modification and status switch can be conveniently reached. Welding torch can be adjusted up and down, side to side and angled turn to meet welding requirement.