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Research Papers: Heat Transfer in Manufacturing

Methodology for the Measurement of the Heat Partitioning by Thermal Imaging in the Orthogonal Cutting Process

[+] Author and Article Information
T. Augspurger

Laboratory for Machine Tools and
Production Engineering (WZL),
RWTH Aachen University,
Aachen 52062, Germany
e-mail: t.augspurger@wzl.rwth-aachen.de

T. Bergs, B. Döbbeler, A. Lima

Laboratory for Machine Tools and
Production Engineering (WZL),
RWTH Aachen University,
Aachen 52062, Germany

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received August 2, 2018; final manuscript received January 30, 2019; published online May 14, 2019. Assoc. Editor: Ali Khounsary.

J. Heat Transfer 141(7), 072101 (May 14, 2019) (5 pages) Paper No: HT-18-1499; doi: 10.1115/1.4043170 History: Received August 02, 2018; Revised January 30, 2019

The thermal conditions like temperature distribution and heat fluxes during metal cutting have a major influence on the machinability, the tool life time, and the metallurgical structure of the work piece material. Though numerous analytical and experimental efforts have been developed in order to understand the thermal conditions in metal cutting, many questions still prevail. So, the exact form, distribution, and intensity of heat sources in the primary and secondary shear zone, which may describe the observed temperature distributions, are not explored to a satisfactory extend. On the other hand, the influence of the material properties like friction coefficient, heat conductivity, and shear strength is not yet fully understood. Another essential question is the heat flux partition among chip, work piece, and tool depending on process parameters and material. The particular novelty of the current investigation is a new methodological approach using modern thermal measurement system and postprocessing methods in order not only to measure the entire temperature field in the orthogonal cutting zone but also to calculate the affiliated heat flow distribution in the cutting process. Thus, the cutting process is treated as energy conversation process of the governing mechanical power into sensible heat. This point of view offers compatibility across process parameters and materials, thus new possibilities for process design.

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Copyright © 2019 by ASME
Topics: Heat , Temperature , Cutting
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References

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Figures

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Fig. 1

Experimental setup

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Fig. 2

Control volume for the energy balance [10]

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Fig. 3

Temperature fields for hsp = 300 μm and vc = 100 m/min and work piece position x = 124 mm after regression

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Fig. 4

Temperature field and isothermal lines for hsp = 300 μm and vc = 100 m/min and work piece position x = 124 mm and x = 200 mm, respectively

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Fig. 5

Heat partitions over time for hsp = 300 μm and vc = 100 m/min

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Fig. 6

Temporal plot of heat partition into tool

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