End mill for orbital drilling

B - Operations – Transporting – 23 – C

Patent

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B23C 5/10 (2006.01) B23C 5/02 (2006.01)

Patent

CA 2744899

A center or non-center cutting end mill (10, 10', 10") for orbital drilling includes a shank (12) having a shank diameter (20); a neck (14) having a neck diameter (22); a cutting head (16) having a cutting diameter (24); a corner radius (30); a dish angle (28); and a longitudinal axis (18), the cutting head including a forward cutting end (26) having a convexly curved section (29) located between the longitudinal axis and the corner radius, wherein the convexly curved section causes material removed from a workpiece to flow radially outward from an initial contact area (31) toward the corner radius, thereby minimizing the accumulation of material in a central portion (26a) of the forward cutting end.

Une fraise en bout coupante centrale ou non centrale (10, 10', 10'') pour le perçage orbital comprend une queue (12) présentant un diamètre de queue (20) ; un collet (14) présentant un diamètre de collet (22) ; une tête de coupe (16) présentant un diamètre de coupe (24) ; un rayon de bec (30) ; un angle de cuvette (28) ; et un axe longitudinal (18). La tête de coupe comprend une extrémité de coupe avant (26) présentant une section incurvée convexe (29) située entre l'axe longitudinal et le rayon de bec. La section incurvée convexe amène le matériau retiré d'une pièce à usiner à s'écouler radialement vers l'extérieur depuis une zone de contact initiale (31) vers le rayon de bec, ce qui permet de réduire l'accumulation du matériau dans une partie centrale (26a) de l'extrémité de coupe avant.

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