SLAG DETERMINATION METHOD, SLAG DETERMINATION DEVICE, AND WELDED JOINT MANUFACTURING METHOD

• Main Authors: MATSUBA MASAHIRO, KINOSHITA MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 20.08.2020
• Subjects: APPARATUS THEREFOR; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MACHINE TOOLS; MEASURING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; PHYSICS; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS; SOLDERING OR UNSOLDERING; TESTING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

To evaluate the electrodeposition coating property of weld metal further easily with high accuracy without relying on the skill of an evaluator.SOLUTION: A slag determination method according to the present invention includes: an imaging step of irradiating an imaging region including a part where a first steel material and a second steel material are connected to each other via a weld metal with white light from an illumination light source and taking an image of the imaging region irradiated with the white light with an imaging device capable of color imaging to generate a processing object image; and an image processing step of extracting predetermined color components of color components forming the processing object image, applying binarization processing to each of the extracted color components to determine whether there is slag containing Si complex oxide on the weld metal.SELECTED DRAWING: Figure 12 【課題】溶接金属における電着塗装性を、評価者の熟練度に依らず、より簡便かつ高精度に評価すること。【解決手段】本発明に係るスラグの判定方法は、第１の鋼材と第２の鋼材とが溶接金属を介して互いに接続された部位を含む撮像領域に対して照明光源から白色光を照射し、当該白色光の照射されている前記撮像領域をカラー撮像が可能な撮像装置で撮像することで処理対象画像を生成する撮像ステップと、前記処理対象画像を構成するカラー成分のうち所定の色成分を抽出し、抽出した前記色成分のそれぞれに対して二値化処理を実施することで、前記溶接金属上にＳｉ複合酸化物を含有するスラグが存在するか否かを判定する画像処理ステップと、を含む。【選択図】図１２