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Metals 2018, 8(11), 947; https://doi.org/10.3390/met8110947

A Study on the Cooling Performance of Newly Developed Slice Die in the Hot Press Forming Process

1
School of Aerospace and Mechanical Engineering, Korea Aerospace University, 76 Hanggongdaehang-ro, Deokyang-gu, Goyang-si 10540, Korea
2
Center for Robot Technology and Manufacturing, Institute of Advanced Engineering, 51 Goan-ro, Baegam-myeon, Cheoin-gu, Yongin-si 17180, Korea
3
Laon ENG Industrial Inc., Gueodeulmit-gil, Oedong-eup, Gyeongju-si 38205, Korea
4
MS AUTOTECH Co., Ltd., 16-9 Poseok-ro, Naenam-myeon, Gyeongju-si 38198, Korea
5
Daewoo Shipbuilding & Marine Engineering Co., Ltd., 125 Namdaemoon-ro, Jung-gu, Seoul 04521, Korea
*
Author to whom correspondence should be addressed.
Received: 21 September 2018 / Revised: 30 October 2018 / Accepted: 11 November 2018 / Published: 14 November 2018
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Abstract

The cooling performance of a slice die is studied numerically and experimentally. The slice die is designed to improve the cooling performance compared to that of a conventional die that is generally used in the Hot Press Forming (HPF) process by modifying the cooling channel layout and arrangement. In order to understand the physical phenomenon of the slice die cooling performance, the cooling performance of the conventional die is also simulated and their results are compared with the slice die results. From the results of the maximum temperature of the blank and die and the temperature distribution of the blank, the slice die has considerably improved cooling performance. To validate the simulation results, the slice die is prototyped and a blank is produced by the HPF process. Blank temperatures are measured by a thermal imaging camera at several holding times. The simulation and experimental results of the blank temperatures are compared and agree with the error rate of 3%. In order to verify the quality of the produced blank, ultimate tensile stress, yield stress, and elongation tests are conducted for specimens that are extracted from the blank and are compared with existing literature results. View Full-Text
Keywords: Hot Press Forming (HPF); hot stamping; slice die; cooling performance Hot Press Forming (HPF); hot stamping; slice die; cooling performance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Lee, S.H.; Park, J.; Park, K.; Kweon, D.K.; Lee, H.; Yang, D.; Park, H.; Kim, J. A Study on the Cooling Performance of Newly Developed Slice Die in the Hot Press Forming Process. Metals 2018, 8, 947.

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