| 摘要 |
PROBLEM TO BE SOLVED: To provide a radius end mill capable of high-feed cutting by improving cutting performance and chipping resistance of a rounded corner cutting edge of the radius end mill. SOLUTION: In this radius end mill, a rounded corner cutting edge is curved in a projected shape in a view of a rounded corner of the end mill at 45 degrees. C is a position where the position of the maximum value of the projecting amount of projection from a line segment AB passing through an R0-degree part A and an R90-degree part B of the rounded corner cutting edge is projected on the line segment AB. Similarly, D is a position on the side of A on the line segment AB which is 3/4 of the maximum value, E is a position on the side of A on the line segment AB which is 1/2 of the maximum value, and F is a position on the side of A on the line segment AB which is 1/4 of the maximum value. Each length of line segments CD, DE, EF and FA is gradually changed smaller in this order, the changing amount is gradually smaller, and the length of the line segment CD is 50% or more of the line segment AC. Thereby, chipping resistance at the time of high-feed cutting is improved. COPYRIGHT: (C)2004,JPO
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