HIGH PRECISION MACHINING OF MICRO-CUTTING EDGE USING ON-MACHINE LASER HARDENING SYSTEM

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560141
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Production engineering/Processing studies
• Research Institution: Ryukoku University (2014); The University of Shiga Prefecture (2012-2013)
• Principal Investigator: OGAWA Keiji 龍谷大学, 理工学部, 講師 (80405232)
• Co-Investigator(Kenkyū-buntansha): NAKAGAWA Heisaburo 滋賀県立大学, 工学部, 教授 (50033345) ; TANABE Hirotaka 滋賀県立大学, 工学部, 准教授 (00275174)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 生産工学・加工学 / 特殊加工 / レーザ加工 / 表面改質 / 焼入れ / 高精度

Outline of Final Research Achievements

Micro-cutting edges are often used for die cutting of such as functional films. A hardening process is needed because the ridgelines of micro-cutting edges require not only wear resistance, but also sharpness and shape accuracy. A method of laser hardening after machining for the micro-cutting edge fabrication was developed. This process uses laser hardening after shape fabrication of the micro-cutting edge in a pre-hardened steel workpiece. However, edge melting due to overheating during laser irradiation is likely to occur because the heat capacity is very small. Hence, a novel method to overcome these issues is needed. Therefore, a novel method such as micro-cutting edge shape formation after laser hardening was proposed and demonstrated its effects for micro-cutting edges. Effects of this method was investigated comparing with the method of laser hardening after machining. Some experiments results revealed applicability of the method to curve-shaped micro-cutting edges.

Free Research Field

工学