PROBLEM TO BE SOLVED: To provide a processing method capable of reducing control load caused by scanning of a laser beam, and performing accurate laser processing to a workpiece which is transported on a three-dimensional transport plane.SOLUTION: The invention is configured to process a workpiece 10 by radiating a laser beam 30 emitted from a light source 35 to the workpiece 10 transported along a transport plane 21a, while scanning the laser beam. The transport plane 21a has a curve surface. Prior to processing of the workpiece 10, on the basis of a relationship between each theoretical position C of a radiation point group of the laser beam 30 on the transport plane 21a and a measurement position Pc corresponding to each theoretical position C of the radiation point group on a development plane obtained by developing the transport plane 21a to a flat plane, the measurement position Pc corresponding to each theoretical position C of the radiation point group in the development plane obtained by developing the transport plane 21a to a flat plane, is corrected to each theoretical position C of the radiation point group, for determining in advance, a coordinate system of the laser beam 30 on the transport plane 21a. On the basis of positional information of the workpiece 10 being transported and the coordinate system, the laser beam 30 is radiated to the workpiece 10.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2020,JPO&INPIT【課題】レーザー光の走査に起因する制御負荷を軽減しつつ、三次元搬送面上に搬送される被加工物に対して高精度なレーザー加工を行うこと。【解決手段】搬送面２１ａに沿って搬送される被加工物１０に、光源３５から発せられたレーザー光３０を走査しながら照射して、被加工物１０を加工する。搬送面２１ａは曲面部を有する。被加工物１０の加工に先立ち、搬送面２１ａにおけるレーザー光３０の照射点群の各理論位置Ｃと、搬送面２１ａを平面に展開した展開平面における照射点群の各理論位置Ｃに対応する測定位置Ｐｃとの関係に基づき、搬送面２１ａを平面に展開した展開平面における照射点群の各理論位置Ｃに対応する測定位置Ｐｃを照射点群の各理論位置Ｃに補正することで、搬送面２１ａにおけるレーザー光３０の座標系を予め決定しておく。当該座標系と、搬送中の被加工物１０の位置情報とに基づいて、被加工物１０にレーザー光３０を照射する。【選択図】図５
