A STUDY ON THE COOLING PERFORMANCE OF FRACTAL MICROCHANNELS WITH METAL ADDITIVE MANUFACTURING IN HOT STAMPING

Sewon Lee, Changho Han, Jinyoung Kim, Junho Kwon, Changhyun Baek, Yongchan Kim

Research output: Contribution to journalConference articlepeer-review

Abstract

Hot stamping has emerged as a propitious technology in the automotive sector due to its energy-conserving and safety-centric characteristics. However, the conventional approach of using indirect cooling channels has been constrained by thermal resistance, which restricts the scope for improving the cooling efficiency. To overcome this limitation, novel fractal micro channels for direct cooling have been proposed for die in hot stamping. Empirical investigations were conducted by varying the thickness of the blank and the holding time of the press to obtain the average blank temperature. The average blank temperature exhibits an initial rapid decline followed by a gradual decrease, which is attributed to the diminished temperature differential between the cooling channel and water.

Original languageEnglish
JournalInternational Heat Transfer Conference
Publication statusPublished - 2023
Event17th International Heat Transfer Conference, IHTC 2023 - Cape Town, South Africa
Duration: 2023 Aug 142023 Aug 18

Bibliographical note

Publisher Copyright:
© 2023 Begell House Inc.. All rights reserved.

Keywords

  • Additive manufacturing
  • Boiling heat transfer coefficient
  • Fractal microchannel
  • Liquid replenishment
  • rewetting effect
  • Visualization

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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