METHOD FOR CALIBRATING LAMINATION MOLDING DEVICE

To provide a method for calibrating a lamination molding device capable of more correctly performing the calibration of a laser coordinate system.SOLUTION: A method for calibrating a lamination molding device comprises: a calibration plate installation step in which a calibration plate is installed in a molding region; an inert gas feed step in which an inert gas is filled into a chamber; a temporal measurement point formation step in which the calibration plate is irradiated with a laser beam to form a temporal measurement point; a temporal measurement point specification step in which the position of the temporal measurement point is specified; an adaptive decision step in which it is decided that the calibration plate is adaptive to the environment in the chamber when the displacement of the temporal measurement point reaches a prescribed threshold or less; a normal measurement point formation step in which a normal measurement point is formed against the target position of the calibration plate by a laser beam; a normal measurement specification step in which the position of the normal measurement point is specified; and a correction step in which, based on the irradiation position of the normal measurement point specified in the normal measurement point specification step, corrected data in which the deviation quantity in each point of the laser coordinate system is specified are created.SELECTED DRAWING: Figure 4 【課題】より正確にレーザ座標系の較正を行える積層造形装置の較正方法を提供する。【解決手段】造形領域に較正板を設置する較正板設置工程と、チャンバに不活性ガスを充満させる不活性ガス供給工程と、較正板にレーザ光を照射して仮測定点を形成する仮測定点形成工程と、仮測定点の位置を特定する仮測定点特定工程と、仮測定点の変位量が所定の閾値以下となったとき較正板がチャンバ内の環境に順応したと判定する順応判定工程と、較正板の目標位置に対してレーザ光により本番測定点を形成する本番測定点形成工程と、本番測定点の位置を特定する本番測定点特定工程と、本番測定点特定工程で特定された本番測定点の照射位置に基づいてレーザ座標系の各地点におけるずれ量を特定した補正データを生成する補正工程と、を備える積層造形装置の較正方法が提供される。【選択図】図４