Laser machining apparatus and method for forming a surface on an unfinished product

摘要

The laser processing device for the production of a contour on a blank (27), comprises a laser, which produces the laser beam impulse (24), a deflection device (23) that straightens the laser beam impulse of the laser on point of impingement within a predetermined pulse area (55) on the blank, and a positioning device that guides a relative movement between the blank and the pulse surface, where the relative movement passes in relative movement direction along the edge to be produced and/or the surface. The laser processing device for the production of a contour on a blank (27), comprises a laser, which produces the laser beam impulse (24), a deflection device (23) that straightens the laser beam impulse of the laser on point of impingement within a predetermined pulse area (55) on the blank, and a positioning device that guides a relative movement between the blank and the pulse surface, where the relative movement passes in relative movement direction along the edge to be produced and/or the surface. The positioning device adjusts an inclination angle between the radiation direction of the laser beam impulse and a surface to be produced on the blank. The material part of the blank covering the edge and/or the surface to be produced is areawisely removed in coating layers running parallel to pulse area. The coating layers extend itself transverse to the surface to be produced in the blank. The positioning device changes the inclination angle during processing the blank. The inclination angle is pre-determined in dependent upon the material of the blank to be worn out in the positioning device. The blank comprises a cutting material layer that is arranged on a carrier layer and the material part extends itself over both layers. The positioning device adjusts a first inclination angle for applying the materials of the cutting material layer, and a second inclination angle for applying the materials of the carrier layer. The intensity of the laser impulse during applying the material of the cutting material layer is different than during the application of the material of the carrier layer. The cutting material layer is implemented as cutting element and the carrier layer is implemented as carrier element, where the cutting material layer and the carrier layer are detachably connected to each other. The sum of the inclination angle is 5-25[deg] . The deflection means arranges the laser beam impulse on the point of impingement provided along a pre-determined pulse web. The pulse web has a starting point and ending point, which is arranged to marked point of impingement at the edge of the pulse area that is associated to the edge and/or surface. The interval between two points of impingement is provided along the pulse web through the impulse frequency of the laser and the adjustment speed of the deflection unit. The deflection device arranges two directly successive laser beam impulse on different impingement points of the pulse area, and two impulse sequences with two laser beam impulses on different impingement points of the pulse area. An independent claim is included for a method for producing a contour on a blank.