Temperature-distribution measurements in cutting tools during the machining process are extremely difficult and remain an unresolved problem. In this paper, cutting temperature distributions are measured by thin film thermocouples (TFTCs) embedded into Polycrystalline Cubic Boron Nitride (PCBN) cutting inserts in the immediate vicinity of the tool-chip interface. Using these measurements, steady and dynamic phenomena during hard turning as well as the chip morphology and formation process were analyzed based on the cutting temperature distributions in the insert. The relationship between the cutting temperature-field distributions in the PCBN insert and the segmented chip formation is analyzed using temperature-distribution mapping. It is shown that the temperature-distribution in the cutting zone depends on the shearing band distribution in the chip and the thermal transfer rate from the heat generation zone to the cutting tool. Furthermore, it became evident that the material flow stress and the shearing bands greatly affect not only the chip formation morphology but also the cutting temperature field distributions in the cutting zone of the cutting insert.
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ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing
June 4–8, 2012
Notre Dame, Indiana, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-5499-0
PROCEEDINGS PAPER
Experimental Investigation of Hard Turning Mechanisms by PCBN Tooling Embedded Micro Thin Film Thermocouples Available to Purchase
Linwen Li,
Linwen Li
Northwestern University, Evanston, IL
Huazhong University of Science and Technology, Wuhan, Hubei, China
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Bin Li,
Bin Li
Huazhong University of Science and Technology, Wuhan, Hubei, China
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Xiaochun Li,
Xiaochun Li
University of Wisconsin-Madison, Madison, WI
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Kornel F. Ehmann
Kornel F. Ehmann
Northwestern University, Evanston, IL
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Linwen Li
Northwestern University, Evanston, IL
Huazhong University of Science and Technology, Wuhan, Hubei, China
Bin Li
Huazhong University of Science and Technology, Wuhan, Hubei, China
Xiaochun Li
University of Wisconsin-Madison, Madison, WI
Kornel F. Ehmann
Northwestern University, Evanston, IL
Paper No:
MSEC2012-7262, pp. 307-316; 10 pages
Published Online:
July 19, 2013
Citation
Li, L, Li, B, Li, X, & Ehmann, KF. "Experimental Investigation of Hard Turning Mechanisms by PCBN Tooling Embedded Micro Thin Film Thermocouples." Proceedings of the ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. ASME 2012 International Manufacturing Science and Engineering Conference. Notre Dame, Indiana, USA. June 4–8, 2012. pp. 307-316. ASME. https://doi.org/10.1115/MSEC2012-7262
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