The spatial and temporal distribution of tool temperature in drilling of commercially pure titanium is studied using the inverse heat transfer method. The chisel and cutting edges of a spiral point drill are treated as a series of elementary cutting tools. Using the oblique cutting analysis of the measured thrust force and torque, the forces and frictional heat generation on elementary cutting tools are calculated. Temperatures measured by thermocouples embedded on the drill flank face are used as the input for the inverse heat transfer analysis to calculate the heat partition factor between the drill and chip. The temperature distribution of the drill is solved by the finite element method and validated by experimental measurements with good agreement. For titanium drilling, the drill temperature is high. At 24.4 m/min and 73.2 m/min drill peripheral cutting speed, the peak temperature of the drill reaches 480°C and 1060°C, respectively, after 12.7 mm depth of drilling with 0.025 mm feed per cutting tooth. The steady increase of drill temperature versus drilling time is investigated.
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August 2007
Technical Papers
Tool Temperature in Titanium Drilling
Rui Li,
Rui Li
Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125
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Albert J. Shih
Albert J. Shih
Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125
Search for other works by this author on:
Rui Li
Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125
Albert J. Shih
Mechanical Engineering,
University of Michigan
, Ann Arbor, MI 48109-2125J. Manuf. Sci. Eng. Aug 2007, 129(4): 740-749 (10 pages)
Published Online: April 1, 2007
Article history
Received:
June 1, 2006
Revised:
April 1, 2007
Citation
Li, R., and Shih, A. J. (April 1, 2007). "Tool Temperature in Titanium Drilling." ASME. J. Manuf. Sci. Eng. August 2007; 129(4): 740–749. https://doi.org/10.1115/1.2738120
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