Provided is a laser machining system that is able to carry out machining accurately even when a workpiece joint meanders. A laser machining system according to one embodiment of the present disclosure is provided with: a laser machining head having a laser optical system that has a Galvano scanner, and a tracking sensor for detecting a joint in a workpiece; a machining robot for positioning the laser machining head; a holding robot for holding the workpiece; a machining robot control unit for controlling the machining robot so as to move the laser machining head along a joint according to a design; a holding robot control unit for controlling the holding robot so as to move the workpiece such that the distance between the position of the joint as detected by the tracking sensor and the middle of the detection range of the tracking sensor remains within a prescribed range; and a Galvano scanner control unit for controlling the Galvano scanner so as to set the irradiation position of the laser light at a position that is offset by the movement amount of the workpiece from the position of the joint as detected by the tracking sensor.

Provided is a laser machining system that is able to carry out machining accurately even when a workpiece joint meanders. A laser machining system according to one embodiment of the present disclosure is provided with: a laser machining head having a laser optical system that has a Galvano scanner, and a tracking sensor for detecting a joint in a workpiece; a machining robot for positioning the laser machining head; a holding robot for holding the workpiece; a machining robot control unit for controlling the machining robot so as to move the laser machining head along a joint according to a design; a holding robot control unit for controlling the holding robot so as to move the workpiece such that the distance between the position of the joint as detected by the tracking sensor and the middle of the detection range of the tracking sensor remains within a prescribed range; and a Galvano scanner control unit for controlling the Galvano scanner so as to set the irradiation position of the laser light at a position that is offset by the movement amount of the workpiece from the position of the joint as detected by the tracking sensor.

The invention relates to a device (100) for an additive manufacture. The device (100) comprises a laser device (110) for machining material using a laser beam (112), said laser device (110) being designed to deflect the laser beam (112) onto a machining region of a workpiece (10); at least one supply device (130) for a supply material, said supply device being designed to supply the supply material to the machining region; and an interferometer (140) which is designed to measure a distance to the workpiece (10) by means of an optical measuring beam (142).

A method for identifying joining positions of workpieces includes capturing images of a joint by a camera, determining measurement data for the joining positions associated with a course of the joint from the images of the joint, determining a mathematical model of the joint course from a part of the measurement data, providing a curve based on the mathematical model for positioning a welding laser during a laser welding process along the curve.

A method for identifying joining positions of workpieces includes capturing images of a joint by a camera, determining measurement data for the joining positions associated with a course of the joint from the images of the joint, determining a mathematical model of the joint course from a part of the measurement data, providing a curve based on the mathematical model for positioning a welding laser during a laser welding process along the curve.

A plurality of values measured are relatively compared to determine an optical axis deviation direction in which an optical axis of a measurement beam S deviates from a laser beam L. In performing laser welding in the optical axis deviation direction, an irradiation position of the measurement beam S is changed so that the irradiation position of the measurement beam S is moved to a rear side of the center of the optical axis of the laser beam L in the welding direction.

A plurality of values measured are relatively compared to determine an optical axis deviation direction in which an optical axis of a measurement beam S deviates from a laser beam L. In performing laser welding in the optical axis deviation direction, an irradiation position of the measurement beam S is changed so that the irradiation position of the measurement beam S is moved to a rear side of the center of the optical axis of the laser beam L in the welding direction.

A method for monitoring a curved solidified weld seam during the welding of a workpiece includes carrying out distance measurements using a measurement beam of an optical coherence tomograph both at one or more pre-measurement points situated upstream of a present welding position, and at one or more post-measurement points situated downstream of the present welding position, and monitoring the curved, solidified weld seam on the basis of the distance measurements. In the case of a plurality of post-measurement points, a post-measurement line is formed from the plurality of post-measurement points and positioned to be offset relative to a pre-measurement line in the direction of the pre-measurement line toward the curved, solidified weld seam and/or is rotated relative to the pre-measurement line. In the case of a single post-measurement point, spacing the single post-measurement point from a line passing through the present welding position in the welding direction.

A method for monitoring a curved solidified weld seam during the welding of a workpiece includes carrying out distance measurements using a measurement beam of an optical coherence tomograph both at one or more pre-measurement points situated upstream of a present welding position, and at one or more post-measurement points situated downstream of the present welding position, and monitoring the curved, solidified weld seam on the basis of the distance measurements. In the case of a plurality of post-measurement points, a post-measurement line is formed from the plurality of post-measurement points and positioned to be offset relative to a pre-measurement line in the direction of the pre-measurement line toward the curved, solidified weld seam and/or is rotated relative to the pre-measurement line. In the case of a single post-measurement point, spacing the single post-measurement point from a line passing through the present welding position in the welding direction.

A teaching system includes a sensor that detects the intensity of reflected light and at least one processor configured to: receive inputs and perform a generation of teaching data that enables laser machining at all machining points by using a laser beam having an angle larger than or equal to the minimum value and smaller than the maximum value; determine whether or not intensities of reflected light at all the machining points include an intensity exceeding a predetermined threshold value; increase the minimum value at a corresponding machining point by a predetermined increment if the determination result indicates that the threshold value is exceeded; and repeat the generation of the teaching data using a most-recently adjusted minimum value, the determination, and adjustment of the minimum value until it is determined that the threshold value is not exceeded.