Mitsubishi Heavy Industries Technical Review
    Vol. 57 No. 3 (2020)   Machine Tools
    Technical Papers

    Manufacturing Technology of LAMDA Three-Dimensional Metal-based Additive Manufacturing System Using Powder DED Method

    Koh Ishii,
    Hirohisa Kuramoto,
    Hiroyuki Tauchi,
    Yusuke Yamamoto,
    Tomohiro Wakana,
    Hitoshi Yoshimura

    Powder DED (Directed Energy Deposition) metal-based additive manufacturing is characterized by its fast manufacturing speed and ease of increasing the equipment size. On the other hand, it also has issues such as metal deterioration caused by oxidation occurring in the process of melting and solidification during manufacturing, as well as securing the shape and dimensions. Mitsubishi Heavy Industries Machine Tool Co., Ltd. uses its own LAMDA powder DED three-dimensional metal-based additive manufacturing machine equipped with a local shield to manufacture sample aircraft parts while suppressing the oxidation of titanium alloy, which is an active metal. This machine is also able to suppress shape collapse during manufacturing by optimally controlling the heat input using the monitoring function system.