Laser welding head with associated roller

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 in the range of 1 to 5 cm.

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, and
• a position of the laser beam projecting unit on the pressing unit is adjusted by a fine-adjustment device.

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 device has a roller supported with its flat side surface inclined at a predetermined angle to a direction in which a laser beam projected by the laser beam projecting unit travels, and
• the roller is supported such that the flat side surface thereof extends along a profile of the laser beam projected and focused by the laser beam projecting unit.

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,
• the pressing device has a roller support structure fixed to the movable member,
• the roller support structure including:
• an upper member having an L-shaped cross section,
• an intermediate member having a substantially L-shaped cross section, having an inclined surface inclined outward with respect to the movable member, and joined to the upper member, and
• a roller support member joined to the inclined surface of the intermediate member to support the roller with its flat side surface inclined to a vertical.