Machining, Measurement, and Control Laboratory

2 0 0 1    J o u r n a l    P a p e r

A Study on Endmilling of Hardened Steels
-- Comparison of SKD11 and SKD61 --
Heisaburo Nakagawa (The University of Shiga Prefecture)
Toshiki Hirogaki (The University of Shiga Prefecture)
Komatsugu Nishimura (The University of Shiga Prefecture)
Yoshiaki Kakino (Kyoto University)
Yoshihiro Kita (Osaka Institute of Technology)
Hirotoshi Otsuka (Oita Industrial Research Institute)

This paper deals with the characteristics of end-milling the hardened steels (SKD11 and SKD53: HRC53). The experiment under various cutting speeds was done in order to estimate the relationship between the cutting distance and the cutting speed. The cutting forces and chip temperature were measured in the experiment. The hardness of the chip was also researched after cutting. The tooth form of the used tool and the cutting fluid were varied to estimate the deposition of the materials. Furthermore, the carbide included in the chip was observed was observed by AFM and the microscope. As a result, it is clear that the carbide included in SKD11 makes it difficult to end-mill comparing SKD11 and SKD61.

Key words: hardened steel, die, machinability, CAM, hardness, AlTiN

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