No.11（2016）11.Accuracy improvement by correcting 3D data in laser sintering AM technologies

Ryuichi Kobayashi，Seiji Koganei，Yuki Yamauchi

  Plastic parts built by Additive Manufacturing (AM) technologies contribute to an acceleration of the product development process. This is because AM allows 3D objects to be obtained from 3D CAD data directly and quickly compared to traditional methods. However, parts built by AM face problems such as accuracy etc. In this study, we focused on a method of feeding back the first prototype information to the next prototype so as to improve its accuracy. A box shape with an opening was first built using laser sintering and then shape data of the box was obtained using a 3D digitizer. The shape data was compared to the CAD data and the deformation causes were estimated based on the comparison results. These are then expressed as boundary conditions in a simulation using the finite element method. Moreover, a corrected shape was generated by inverting the boundary conditions. Using this method, we managed to suppress deformation by modeling the corrected shape.

Keywords
3D printer, Additive manufacturing, Laser sintering, Data correction, Feedback, Finite element method

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