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Title: Temperature generation in cutting of Aluminium at low and negative rake angles

By: K.M.Vernaza Pena, J.J.Mason, T.C.Ovaert and Ming Li.

Date: June 2-4, 2003.

Abstract:
A modified split Hopkinson bar apparatus is employed to simulate orthogonal machining of aluminium, and an array of HgCdTe high-speed infrared detectors is used to experimentally measure the temperature field distribution at the surface of the workpiece during this process. The effect of small positive and negative rake angle on the temperature fieldin the process of cutting 6061-T6 aluminium alloy is examined. It is seen that the rake angle can significantly vary both the maximum temperature as well as the distribution of the temperature field in the chip. As the rake angle decreases, the primary shear zone in the workpiece contributes more to the temperature distribution and friction at the tool/chip interface is less intense. These results are consistent with increased plastic strain in the chip and increased cutting forces during the cutting process.