HIGH ENERGY BEAM WELDING QUALITY DETERMINING METHOD, QUALITY DETERMINING DEVICE USING DETERMINING METHOD, AND WELDING MANAGEMENT SYSTEM USING DETERMINING METHOD

摘要

The present invention can improve accuracy of determining a welding quality or accuracy of maintaining, through feedback, a fixed welding quality in high energy beam welding, and thereby, improves the manufacturing efficiency, that is, the yield of welded articles. The present invention is characterized in that: an image of a molten pool is acquired by a camera; the width, length, and area of the molten pool are acquired by image processing; reflected light, plasma, and thermal radiation light are further acquired by an optical sensor; a weld penetration depth is predicted with high accuracy by multiple regression analysis using signals and using certain signals having interaction therebetween among the signals, and thus, a welding quality is determined with high accuracy; and beam output and a focal position are also predicted, the beam output and the focal point are maintained at appropriate values by feedback control of the beam output and the focal position, and thus, the welding quality is maintained at a fixed level.