Evaluation for laser command generation in directed energy deposition applying a three dimensional heat conduction simulation

Toshiki Kodama, Ryo Koike, Yasuhiro Kakinuma, Yohei Oda

研究成果: Paper査読

抄録

Metal additive manufacturing is a promising process for various industries in next generation, which provides high freedom of design, waste reduction, and applicability to difficult-to-cut materials. Directed energy deposition, which is one method of metal additive manufacturing, still has a challenge in the shape accuracy which deteriorates due to overheating in the edge. In order to suppress the overheating, this study proposes a laser command generation available to each deposition path by applying a heat conduction simulation. The laser command is determined by a three-dimensional heat conduction simulation with a finite difference method. The proposed laser command generation was evaluated through the deposition test, comparing with a conventional process with constant laser power. The experimental result clearly shows that the deformation due to overheating can be suppressed by adjusting the laser power according to the deposition height. Moreover, through the temperature measurement with a thermography, and calibrating the simulation, the deterioration in shape accuracy can be efficiently suppressed.

本文言語English
出版ステータスPublished - 2018
イベント21st International Symposium on Advances in Abrasive Technology, ISAAT 2018 - Toronto, Canada
継続期間: 2018 10 142018 10 16

Conference

Conference21st International Symposium on Advances in Abrasive Technology, ISAAT 2018
国/地域Canada
CityToronto
Period18/10/1418/10/16

ASJC Scopus subject areas

  • 材料力学
  • 産業および生産工学
  • 機械工学
  • 材料科学(全般)

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