Investigation of the Milling Characteristics of Hardened SKD61 Tool Steel

• Main Authors: Ming-Yuan Zheng, 鄭茗元
• Other Authors: J-J Junz Wang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/cf2j26

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 90 === Abstract This thesis investigates the influence of shearing and ploughing mechanism on milling characteristics of the hardened SKD61 tool steel by the analytical force models on face milling and ball end milling processes. The effect of flank wear on shearing and ploughing cutting constants is then studied through milling experiments. According to the experiments results, it is shown that increase of the flank wear only affects the shearing cutting constant slightly , but the ploughing cutting constant increases significantly with the flank wear. The cutting constants of hardened and unhardened SKD61 tool steels are compared for ball-end milling process。The magnitude of shearing and ploughing cutting constants on unhardened SKD61 tool steel is larger than on hardened tool steel. And, the surface roughness on unhardened tool steel is rougher than hardened tool steel.