Patent DE-102010005896-A1 (DE)
Title: Laser welding robot for connecting components by a welding seam, comprises a laser welding device arranged on an arm of the robot, a coupling device for laser radiation, a laser head and an electronic control
Inventor: BECKER WOLFGANG
IPC: B23K26/10
Filed: 2010-01-27
Abstract: The laser welding robot for connecting components (62) by a welding seam, comprises a laser welding device arranged on an arm of the robot, a coupling device for laser beam (16), a laser head (10) that is arranged through a 3D-scanning mirror (15) with an adjustable mirror for focusing and positioning the laser beam on the component and has focusing optics (15', 15") with positioning device, and an electronic control for the components forming the laser head. The laser head is arranged in a working interval of 250 mm to a joining position of the welding seam to be formed. The laser welding robot for connecting components (62) by a welding seam, comprises a laser welding device arranged on an arm of the robot, a coupling device for laser beam (16), a laser head (10) that is arranged through a 3D-scanning mirror (15) with an adjustable mirror for focusing and positioning the laser beam on the component and has focusing optics (15', 15") with positioning device, and an electronic control for the components forming the laser head. The laser head is arranged in a working interval of 250 mm to a joining position of the welding seam to be formed. A detection device is arranged in or on the laser head for determining a position of the joining place on the component relative to a position of laser beam focus. The detection device is operatively coupled with the electronic control of the laser head. The electronic control is coupled with a control computer, and/or the laser head consists of a collimator driven by a motor. The detection device is a complementary metal-oxide-semiconductor camera, charge coupled device camera or a video camera that comprises an interface to a picture analysis device or includes image evaluation system, which is operatively coupled with the electronic control of the laser head. The optical path of the camera is arranged by a mirror of the scanning mirror partially permeable in an optical path of the laser beam so that the optical path of the camera partially corresponds to the optical path of the laser beam and is directed corresponding to the position of the laser beam focus on the component. A sensor is operatively coupled with the electronic control of the robot over a signal transducer and is optoelectronic sensor, a non-optical sensor based on radio waves, microwaves, terahertz radiation or ultrasonic, or a tactile scanning tip. The operative coupling of the tactile scanning tip is arranged with the electronic control over the signal transducer for the transformation of a received position or power or through reception of the scanning tip with the camera and evaluation of the picture of the scanning tip through the picture evaluation system. An additional wire feed device that provides preload of feed wire against the component is arranged on the laser head. The feed wire provides the tactile scanning tip and a swivel-mounted arrangement of the wire feed device is arranged on the laser head in movable and tactile or tight and rigid manner. An independent claim is included for a laser welding or soldering process for connecting components.