Machining, Measurement, and Control Laboratory

Heat Treatment of on-the-Machine Tools using YAG Laser Source
-- Heat Treatment on the Edge of a Die --
Heisaburo Nakagawa (The University of Shiga Prefecture)
Toshiki Hirogaki (The University of Shiga Prefecture)
Masato Hayami (The University of Shiga Prefecture)
Yoshiaki Kakino (Kyoto University)
Iwao Yamaji (Kyoto University)

This study deals with the heat treatment on the edge of a die using YAG laser on-the- machine tool. First, the temperatures based on a theoretical model during laser irradiation were investigated in order to prevent the melting phenomena of the workpiece surface. Second, heat treatment experiments on the edge of a workpiece were carried out using this system. Quenched part was observed by an optical microscope. As a result, it was confirmed that the calculated results were in good agreement with the experimental ones. Finally, the edge of a lawn mower blade was treated by the selected condition from above results.

Keywords: YAG laser, machining center, heat treatment, on-the-machine, edge of die, optical fiber