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Optimum Shape Design of Cemented Carbide Micro-drill in Consideration of Productivity  

김건회 (전주대학교 공학부)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.13, no.3, 2004 , pp. 133-140 More about this Journal
Abstract
Recently reduction of industrial products in size and weight has been increased by application of micro-drills in gadgets of high precision and a great interest of a micro-drilling has been raised. Due to the lack of tool stiffness and the chip packing, the micro-drilling requires not only the robust tool structure which has not affected by vibration but also effective drilling methods designed to prevent tool fracture from cutting troubles. This paper presents an optimum design shape of a 0.15 mm micro-drill associated with a new manufacturing process to improve the production rate and to lengthen the tool life and suggestions on the micro-drilling characteristic properties associated with the tool life and workpiece quality.
Keywords
Micro-drill; Optimum design; Productivity; Cemented carbides material; Tool life; Workpiece quality; Finite element method;
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