LASER PROCESSING METHOD, LASER WORKED PRODUCTION METHOD, LASER PROCESSING APPARATUS, AND COMPUTER-READABLE RECORDING MEDIUM CONTAINING A PROGRAM FOR CAUSING COMPUTER TO EXECUTE LASER PROCESSING OR LASER WORKED PRODUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To reduce the amount of removal of a covering material at a difficult-to- expand or- separate portion of sufficiently leave the covering material at the machined edge, and prevent the protection of the material surface from decreasing by changing the machining conditions of the first machining process and changing the removal range on the final machining locus. SOLUTION: At a hole-making start portion 23, a circular resin sheet removal portion 25 is obtained by radiating a laser beam 1 to a work under the conditions extracted from a machining program recorded in a memory. In the second machining process, the laser beam machining is started from the hole making start portion 23 by radiating the laser beam 1 to the hole-making start portion 23 of the work under the cutting condition of a steel 21. During the laser beam machining, the steel 21 is cut as the laser beam 1 moves. In addition, a resin sheet 26 around the cut portion of the steel 21 is removed by the laser beam 1. The width of this removed resin sheet 22 is smaller than the diameter of the resin sheet removal portion 25. Much of the assist gas blown out to the machined portion flows into a cut groove 24.