Patent ID: 9592571
Date: 2017-03-14
CPC Classifications: B23K

Claim:
1. A method of selectively brazing or welding, the method comprising: providing a laser apparatus comprising a laser optic head adapted and configured to modify a spot size of a laser beam oscillated by a laser oscillator and to project the laser beam into a joining portion of joining members, wherein the laser optic head is adapted and configured to modify the spot size to selectively perform brazing or welding, and the laser apparatus further comprises a mounting frame and a roller unit, the roller unit adapted to apply pressure to an upper portion of the joining members so as to control a gap between the joining members when laser welding the joining members; and actuating the laser optic head to modify the spot size of the laser beam and project the laser beam into the joining portion of the joining members to selectively perform brazing or welding, wherein the roller unit comprises: a mounting bracket mounted at the mounting frame ahead of the laser optic head; an operating cylinder provided with an operating rod and mounted at a side portion of the mounting bracket, the operating rod being mounted so as to be movable upwardly or downwardly; and a roller connected to a front end of the operating rod, movably mounted at the operating cylinder through guide means, and adapted to slidably contact on an upper surface of the joining member according to the movement of the operating rod and to apply pressure to the joining members, and wherein the guide means comprise: a rail mounted at a surface of the operating cylinder along a length direction thereof, and a rail block slidably mounted on the rail, connected to the operating rod, and having a front end at which the roller is mounted through a connecting block.