Laser processing method, laser processing apparatus and spring arm manufacturing method

摘要

A laser processing method includes the steps of: preparing a long metal object to be irradiated; and irradiating the object with a laser beam at a certain portion in a longitudinal direction of the object. The irradiation is performed along a width direction of the object for both a first half path from one end to the other end of the object in the width direction and a return path from the other end to the one end so that the object can be bent.