Paper Title:
Estimation of Heat Transfer Coefficients in Dry and Cold-Air Cutting
  Abstract

For the analysis of cooling effect, the cutting inserts were heated to 900°C and then exposed in the room-air and cold-air with different pressure respectively. The temperature variation were recorded by infra-red (IR) pyrometer. The temperature-dependent global heat transfer coefficients were estimated by the theoretical analysis and experimental data. The finite element analysis (FEA) was employed to simulate the cooling process and modify the estimated heat transfer coefficients. The heat transfer coefficients decreased from 55.1 W/m2•°C (800°C) to 9.32 W/m2•°C (350°C) in the natural cooling and approximately 300 W/m2•°C (600°C) to 60 W/m2•°C (300°C) in the cold-air cooling. Cold-air cooling greatly increased the heat transfer coefficients, but it seemed the air pressure had little pressure on the heat transfer coefficients.

  Info
Periodical
Advanced Materials Research (Volumes 126-128)
Edited by
Yunn-Shiuan Liao, Chao-Chang A. Chen, Choung-Lii Chao and Pei-Lum Tso
Pages
341-346
DOI
10.4028/www.scientific.net/AMR.126-128.341
Citation
F. Jiang, J. F. Li, J. Sun, S. Zhang, L. Yan, "Estimation of Heat Transfer Coefficients in Dry and Cold-Air Cutting", Advanced Materials Research, Vols. 126-128, pp. 341-346, 2010
Online since
August 2010
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Price
$32.00
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