Method for manufacturing additively-manufactured object

A method for manufacturing an additively-manufactured object, wherein weld beads obtained by melting and solidifying a filler material is deposited with a torch while moving the torch to build a built object, the method comprising:

• a building processing including:
• moving the torch from a starting to an ending to deposit the weld beads based on a deposition plan that defines a shape of the weld beads obtained from a target shape of the built object and a trajectory of the torch for forming the weld beads,
• a base measurement processing of acquiring a measured height by measuring, using a shape sensor, a height of a base at a position where the torch is to be moved when depositing the weld beads,
• a welding condition setting processing of obtaining a planned height of the base at the position where the torch is to be moved from the deposition plan, comparing the measured height acquired in the base measurement processing and the planned height to obtain a differential height, and setting a welding condition in a feedback correction for reducing the differential height, and
• a correction ratio update processing of performing a selection from a plurality of correction ratios set in advance according to a shape characteristic of a position where the weld beads are deposited and updating a correction ratio in the welding condition based on a selected correction ratio,
• wherein when the position where the torch is to be moved is in a starting area for depositing the weld beads, a correction ratio corresponding to a shape characteristic of the starting area is selected from the plurality of correction ratios set for each of shape characteristics to update the welding condition so as to change a travel speed,
• wherein when the position where the torch is to be moved is in an ending area for depositing the weld beads, a correction ratio corresponding to a shape characteristic of the ending area is selected from the plurality of correction ratios to update the welding condition, and
• wherein when the position where the torch is to be moved is in a middle area between the starting area and the ending area, the correction ratio is not selected and the welding condition set is maintained.