Estimation of Heat Transfer Coefficients in Dry and Cold-Air Cutting

Abstract:

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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 et al., "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:

$35.00

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