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Shear and Friction Characteristics in Down-End Milling with Different Helix Angles  

이영문 (경북대학교 기계공학부)
장승일 (경북대 기계공학)
서민교 (경북대 대학원 기계공학)
손정우 (경북대 대학원 기계공학과)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.13, no.2, 2004 , pp. 17-24 More about this Journal
Abstract
In end milling process, undeformed chip thickness and cutting forces vary periodically with phase change of the tool. Recently, a model has been proposed to simulate the shear and friction characteristics of an up-end milling process in terms of the equivalent oblique cutting to this. In the current study, a down-end milling process has been replaced with the equivalent oblique cutting process. And shear and tool-chip friction characteristics variation of SM45C steel has been studied using the end-mills of different helix angles. The specific shear and friction energy consumed with helix angle of $50^{\circ}$ is somewhat larger than those of$30^{\circ}$ and $40^{\circ}$. The specific shear energy consumed is about 76-77% of the specific cutting energy regardless the helix angles.
Keywords
Down-End Milling; Equivalent Oblique Cutting; Shear; Chip-Tool Friction; Undeformed Chip Section Area; Specific Cutting Energy;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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