Patent ID: 6633018
Filing Date: 2003-10-14
Classification: B23K

Abstract:
A laser-welding head comprising:a pressing device capable of moving along parts of workpieces near a weld line to press together the same parts of the workpieces, a pressing unit for applying a predetermined pressure to the pressing device to press the pressing device toward the parts of the workpieces near the weld line, and a laser beam projecting unit mounted on the pressing unit for movement together with the pressing device, wherein the pressing unit includes a pneumatic cylinder actuator for applying the predetermined pressure to the pressing device, the pressing unit includes a support member and a movable member capable of moving relative to the support member, the pneumatic cylinder actuator has an air cylinder supported on the support member, and a piston rod having one end fastened to the movable member, the pressing device is supported on the movable member, the laser beam projecting unit is mounted on the movable member, and a stroke of the piston rod of the pneumatic cylinder actuator is smaller than a diameter of a pressure-bearing surface of the piston rod.