Mitsubishi Heavy Industries Limited

Claus Thomy

Shuji Tanigawa

Ryuichi Narita

Toshiya Watanabe

Masashi Kitamura

Akio Kondou

Hidetaka Haraguchi

Henry Koehler

Yasuyuki Fujiya

Thomas Seefeld

Michael Kalms

Dieter Tyralla

An internal defect detection system for a three-dimensional additive manufacturing device which performs additive molding by emitting a laser beam to a powder bed is provided. This system specifies a candidate position of an internal defect on the basis of a change amount of a local temperature measured in an irradiated part of a powder bed irradiated by a laser beam. The system calculates a cooling speed at the candidate position on the basis of a temperature distribution and determines whether an internal defect exists on the basis of the cooling speed.

Internal defect detection system, three-dimensional additive manufacturing device, internal defect detection method, method of manufacturing three-dimensional additive manufactured product, and three-dimensional

An additive manufacturing method includes: forming a powder bed by supplying a raw material powder; and irradiating the raw material powder that forms the powder bed with a light beam having an intensity distribution of a second or higher order mode or of a top hat shape.

Additive manufacturing method and additive manufacturing apparatus

A process abnormality detection system for a three-dimensional additive manufacturing device which performs additive modeling by emitting a beam to a powder bed determines that a laying abnormality of the powder bed is occurring if at least one of a first condition that an average height of the powder bed from a reference position is out of a first predetermined range or a second condition that a height variation of the powder bed is out of a second predetermined range is satisfied, on the basis of a detection result of a shape measurement sensor.

Process abnormality detection system for three-dimensional additive manufacturing device, three-dimensional additive manufacturing device, process abnormality detection method for three-dimensional additive manufacturing device, method for manufacturing three-dimensional additive manufactured product, and three-dimensional additive manufactured product

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Bremen, Germany

Claus Thomy