ADDITIVE MANUFACTURING TECHNIQUE INCLUDING DIRECT RESISTIVE HEATING OF A WORKPIECE

    公开(公告)号:WO2018194481A1

    公开(公告)日:2018-10-25

    申请号:PCT/RU2017/000249

    申请日:2017-04-19

    Abstract: An additive manufacturing technique is presented. A workpiece is positioned on a building platform of a part building module of an additive manufacturing apparatus. Electrical contacts are attached to the workpiece. The electrical contacts are connected to a current source. A layer of powdered metal material is spread on the building platform and a surface of the workpiece positioned on the building platform. Thus the workpiece is embedded in a bed of the powdered metal material. Subsequently, direct resistive heating of the workpiece is performed by providing the workpiece with the electrical current from the current source via the electrical contacts attached to the workpiece. Finally, one or more portions of a surface of the layer of powdered metal material are selectively scanned by an energy beam arrangement, thereby melting or sintering the selectively scanned portions onto the underlying workpiece.

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