Patent ID: 8168918

Claim:
A control method for laser welding comprising: moving a laser processing head mounted on a robot in a direction from a first welding point to a second welding point differing from the first welding point at a constant speed, wherein said laser processing head has a reflection mirror which changes a laser beam irradiation direction toward said first welding point and a speed of laser beam irradiation position, irradiating the laser beam toward the first welding point by turning said reflection mirror so that a laser focusing position moves in a direction opposite to a direction of motion of said laser processing head, wherein a traveling speed of the laser focusing position is slower than a traveling speed of the laser processing head in proportion to a bead forming distance of said first welding point, and changing the laser beam irradiation direction from the first welding point to the second welding point by turning said reflection mirror after finishing welding of said first welding point, wherein the traveling speed of the laser focusing position is faster than the traveling speed of the laser processing head when forming a weld bead, wherein said reflection mirror is configured to be turned about an X-axis and a Y-axis that intersects perpendicularly with a Z-axis, which is an axis perpendicular to a surface of the reflection mirror.