Process for a local point-by-point heat introduction used in spot welding comprises maintaining the laser beam spot on a prescribed point over a prescribed period

摘要

Process for a local point-by-point heat introduction uses a laser beam on a surface of translatory and/or rotatory moved workpieces, in which the shifting movement of the workpiece is compensated by deviation of the laser beam (2) following the shifting movement. The beam spot is maintained on a prescribed point so that relative movement between the prescribed point on the workpiece (1) and the beam spot is prevented over a prescribed period. An Independent claim is also included for an apparatus for carrying out the process comprising a workpiece arranged on a translatory moving workpiece holder or rotating plate and a laser beam (2) of a laser source (9) directed onto the surface of the workpiece via a mirror (4). The mirror can be tilted about an axis corresponding to the shifting speed of the workpiece either uniformly or in angular steps.