Apparatus for Additive Manufacturing
    1.
    发明申请

    公开(公告)号:US20200222982A1

    公开(公告)日:2020-07-16

    申请号:US16614502

    申请日:2018-03-23

    Applicant: Hitachi, Ltd.

    Inventor: Kinya AOTA

    Abstract: There is provided an additive manufacturing apparatus that can effectively removing fume even in a vacuum state. An additive manufacturing apparatus 1 includes a fume capturing mechanism 8 that is provided to be movable in a space R defined between a beam source 9 and a stage 51, and that captures fume F generated due to melting of a powder P.

    Laser Welding Method and Welded Joint
    3.
    发明申请
    Laser Welding Method and Welded Joint 审中-公开
    激光焊接方法和焊接接头

    公开(公告)号:US20160325377A1

    公开(公告)日:2016-11-10

    申请号:US15110250

    申请日:2014-01-17

    Applicant: HITACHI, LTD.

    Abstract: An object of the present invention is to reduce spatter generation by stabilizing a keyhole in a laser welding method. A welded joint in which a plurality of workpieces are welded by irradiation with a laser beam, wherein the following formulae 1 to 3 are satisfied, b/a≧0.6—(formula 1), h/d≧1.0—(formula 2), and h/a

    Abstract translation: 本发明的目的是通过在激光焊接方法中稳定钥匙孔来减少飞溅物的产生。 一种焊接接头,其中通过照射激光束焊接多个工件,其中满足以下公式1至3,b /a≥0.6-(式1),h /d≥1.0-(式2), 和h / a <3.0-(公式3),其中a是跨越多个工件形成的焊道的表面宽度,h是焊道的最大穿透深度,b是焊道的穿透宽度 焊缝的穿透深度为h / 2的位置,d为焊缝中心位置处的贯通深度。

    MANUFACTURING SYSTEM OF ADDITIVE MANUFACTURING BODY AND MANUFACTURING METHOD OF ADDITIVE MANUFACTURING BODY

    公开(公告)号:US20210101332A1

    公开(公告)日:2021-04-08

    申请号:US16970185

    申请日:2019-02-04

    Applicant: HITACHI, LTD.

    Abstract: A manufacturing system of an additive manufacturing body is provided, by which the accuracy of evaluating a defect during additive manufacturing and the quality of the body can be improved. A manufacturing system of an additive manufacturing body of the present invention includes: an additive manufacturing device; an inspection device having a camera for photographing the powder layer or the solidified layer; and a control device that controls the additive manufacturing device and the inspection device, in which: the camera can photograph the powder layer for each powder layer forming step that is performed repeatedly, or can photograph the solidified layer for each solidified layer forming step that is performed repeatedly; and the control device selects a photographing condition of the camera according to the conditions of the additive manufacturing process.

    Additive Manufacturing Device
    7.
    发明申请

    公开(公告)号:US20190299289A1

    公开(公告)日:2019-10-03

    申请号:US16301478

    申请日:2017-03-08

    Applicant: Hitachi, Ltd.

    Inventor: Kinya AOTA

    Abstract: The purpose of the present invention is to obtain an additive manufacturing device capable of manufacturing while reducing the flow rate of Ar gas. This additive manufacturing device is characterized in that a reduced-pressure atmosphere is maintained in a manufacturing area, an inert gas is supplied to the manufacturing area, the proportion of gaseous impurities in the manufacturing area is detected, and in case where the proportion of gaseous impurities exceeds a threshold value, the supply of inert gas is reduced.

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