Abstract
Analysis of the highest temperature in the machining processes, namely the flash temperature, helps to understand the physics of the process, to improve cutting tool geometry, and to achieve high performance machining. In the present work, the interaction between cutting grain and workpiece material in grinding process is analyzed. Single diamonds are considered for machining, which operates in comparison to other measurements in the range of grinding speed. The highest temperature in the grain-material interaction and cutting forces are measured. In order to measure the flash temperature, an innovative method to measure and analyze the temperature through the diamond grain in the cutting zone by a two-color pyrometer is proposed. Furthermore, cutting forces are measured simultaneously. In order to measure the temperature in the cutting zone, an accurate connection between diamond and pyrometer fiber is required. Thus, the diamond tool holders are manufactured by electrical discharge machining (EDM) milling in deionized water. A 0.5-mm-diameter hole is drilled in each holder to connect the diamond precisely to the pyrometer fiber. Machining processes are performed with 30 μm depth of cut, cutting length of 20 mm, and cutting speed of 65 m/s on Ti6Al4V. The cutting tool is fixed, and the shape of the rotating workpiece is optimized. The diamond holder with the specific shape is designed and manufactured. Quasi-static, dynamic, modal, and harmonic response analyses are performed in order to reduce vibrations and chattering. The measured flash temperature is 1380 °C and cutting normal, tangential, and axial forces are measured.
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Acknowledgements
The authors would like to thank MTTRF for their support for 5-axis machining center of Mori-Seiki NMV5000 DCG-MTTRF and support from Fredy Kuster, Marco Boccadoro, Sandro Wigger, Daniel Spescha, Lukas Seeholzer, and Michael Steck.
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Akbari, M., Kliuev, M., Boos, J. et al. Temperature and force measurements in single diamond scratch tests. Int J Adv Manuf Technol 96, 4393–4405 (2018). https://doi.org/10.1007/s00170-018-1930-0
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DOI: https://doi.org/10.1007/s00170-018-1930-0