Optimal laser power command generation for direct energy deposition by applying gradient descent to a thermal conductivity simulation

Ryo Koike, Shintaro Arano, Yasuhiro Kakinuma, Yohei Oda

Research output: Contribution to journalArticle

Abstract

Direct energy deposition attracts attention from automobile and aerospace industries because of its applicability to complex shape production. Although the meltpool temperature has to be controlled to enhance shape accuracy, industries remain hesitant over introducing a complex process monitoring system because of high cost and necessity of frequent maintenance. In order to keep the meltpool temperature constant, this paper proposes optimal laser power command generation by creating a finite-element thermal conductivity model for a gradient descent calculation. The experimental results clearly indicate that the obtained laser power command enhances the shape accuracy of the deposited objects.

Original languageEnglish
JournalJournal of Advanced Mechanical Design, Systems and Manufacturing
Volume12
Issue number2
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Thermal conductivity
Lasers
Aerospace industry
Process monitoring
Automotive industry
Temperature
Costs
Industry

Keywords

  • Additive manufacturing
  • Direct energy deposition
  • Laser
  • Simulation
  • Thermal conductivity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

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AB - Direct energy deposition attracts attention from automobile and aerospace industries because of its applicability to complex shape production. Although the meltpool temperature has to be controlled to enhance shape accuracy, industries remain hesitant over introducing a complex process monitoring system because of high cost and necessity of frequent maintenance. In order to keep the meltpool temperature constant, this paper proposes optimal laser power command generation by creating a finite-element thermal conductivity model for a gradient descent calculation. The experimental results clearly indicate that the obtained laser power command enhances the shape accuracy of the deposited objects.

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