Sodick Co., Ltd.

Hiroshi Amioka

Ichiro Araie

Atsushi Hirota

Shuji Okazaki

Toshio Kaji

Kazufumi Nambu

Tatsuro Hayakawa

A stress controlled layer is constituted to include a compressive stress applied part that is a region to which a compressive stress is applied and a compressive stress non-applied part that is a region different from the compressive stress applied part. In a solidifying step, scanning of a laser beam or an electron beam is performed while a scanning direction for the compressive stress applied part is different from a scanning direction for the compressive stress non-applied part such that the compressive stress applied part expands further than the compressive stress non-applied part or the compressive stress non-applied part shrinks compared with the compressive stress applied part based on a relationship between the scanning direction and an expansion quantity or a shrinkage quantity at a time of temperature change or at a time of heat treatment.

Method of additive manufacturing

A lamination molding apparatus, includes a material layer former to form a material layer; a first emitter to form a solidified layer by irradiating the material layer with a first beam; and a thermal adjuster to adjust a temperature of at least a portion of the solidified layer to at least one of a predetermined first temperature and a predetermined second temperature. The temperature of at least the portion of the solidified layer is adjusted to the first temperature, and then to the second temperature. When the first temperature is referred to as T, the second temperature is referred to as T, a martensite start temperature of the solidified layer is referred to as Ms, and a martensite finish temperature of the solidified layer is referred to as Mf, all of the following relations of T&#x2265;Mf, T&#x3e;T, and T&#x2264;Ms are satisfied.

Lamination molding apparatus and method for producing three-dimensional molded object

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Kyoto, Japan

Hiroshi Amioka