Nissan Motor Company Limited

Nobuhiro Yoshikawa

Yuji Hamaguchi

Gakushi Komatsu

A focal point controlling section is configured and arranged to control a focal point of the laser beam outputted from a laser oscillator to selectively focus the laser beam on a surface of a workpiece. A laser irradiation position moving section is configured to move a laser irradiation position at which the laser beam strikes on the surface of the workpiece. A control unit is configured to change a heat amount imparted on the surface of the workpiece to switch between a welding state and a non-welding state by controlling at least one of the focal point controlling section and the laser irradiation position moving section while controlling the laser oscillator to continuously output the laser beam before and after switching between the welding state and the non-welding state.

Laser welding method and laser welding system

A laser welding apparatus and method reproduces a welding state substantially identical to an actual operation of a robot at a manufacturing site even when an operating speed of the robot is changed. When a moving speed of the robot is, for example, 50% of an override ratio, a welding point speed, which is a resultant speed of a focus moving speed of the laser beam by movement of the robot having a scanner head and the focus moving speed of the laser beam by rotation of the laser scanning mirror, becomes identical to that when an override ratio is 100%. This is achieved by increasing a rotating speed of a laser scanning mirror within the scanner head.

Apparatus and method for performing laser welding operations

A laser working apparatus includes: a laser head provided with a reflector which changes the direction of any one of a laser beam and a visible light; a robot which moves the laser head; and a robot control apparatus. When laser working is performed, the robot control apparatus controls the laser head so that the laser beam can draw a predetermined working pattern on the basis of a predetermined working position on a work piece. When an operation checking work is performed, the robot control apparatus controls the laser head so that the visible light beam can be emitted only to a reference position of the working pattern.

Laser working apparatus and method of controlling laser working apparatus

A laser welding apparatus and method for easily adjusting a laser focusing position according to a distance from a laser irradiating device to a laser irradiating point on a work piece, or a welding point. A post-collimation laser diameter is measured when the laser emitting end has an optimal laser diameter on the work piece with respect to the distance from the laser processing head to the work piece. Corresponding data is stored with the above distance and the post-collimation laser diameter corresponding to each other. During welding, a diameter of the laser beam passing through a collimate lens is measured by a laser diameter measuring device. The post-collimation laser diameter is adjusted to be an optimal value according to the corresponding data.

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Kawasaki, Japan

Nobuhiro Yoshikawa