Three-dimensional laminating and shaping apparatus, control method of three-dimensional laminating and shaping apparatus, and control program of three-dimensional laminating and shaping apparatus

A three-dimensional laminated and shaped object shaping method comprising:

• ejecting a material of a three-dimensional laminated and shaped object;
• irradiating the ejected material with a light beam;
• capturing a molten pool formed by irradiating the ejected material with the light beam;
• deriving a temperature of the molten pool based on a luminance of an image of the molten pool captured in the capturing;
• deriving a changing scanning direction of the light beam in progress of laminating and shaping the object;
• deriving a shape of the molten pool based on the luminance and the changing scanning direction;
• deriving a cooling rate of the molten pool based on the luminance, a scanning distance of the light beam, and the changing scanning direction;
• and
• deriving a width of the molten pool in a direction perpendicular to the changing scanning direction based on the luminance and the changing scanning direction, using a preset boundary of a threshold of the luminance.

A non-transitory computer readable medium storing a three-dimensional laminated and shaped object shaping program for causing a computer to execute a method comprising:

• ejecting a material of a three-dimensional laminated and shaped object;
• irradiating the ejected material with a light beam;
• capturing a molten pool formed by irradiating the ejected material with the light beam;
• deriving a temperature of the molten pool based on a luminance of an image of the molten pool captured in the capturing;
• deriving a changing scanning direction of the light beam in progress of laminating and shaping the object;
• deriving a shape of the molten pool based on the luminance and the changing scanning direction;
• deriving a cooling rate of the molten pool based on the luminance, a scanning distance of the light beam, and the changing scanning direction;
• and
• deriving a width of the molten pool in a direction perpendicular to the changing scanning direction based on the luminance and the changing scanning direction, using a preset boundary of a threshold of the luminance.