MACHINING HEAD, HOLDER AND EXCHANGEABLE TIP CUTTING TOOL

摘要

Provided are: an exchangeable tip cutting tool in which breakage of the threaded section and breakage of the thread ridges during installation of the machining head and under increased cutting load during cutting are limited and which is capable of performing machining with high efficiency; and a machining head and a holder to be used in the exchangeable tip cutting tool. The flank angle (α) of the pressure flank (11) is set to be larger than the flank angle (β) of the clearance flank (12); and a holder (2, 2a) having a female threaded fastening section (8) wherein the angle of the screwing surface of the pressure flank is set to be larger than the angle of the screwing surface of the clearance flank.

主权项

1. A machining head comprising:
a cutting edge section provided at the tip thereof; a male threaded fastening section to be screwed to a holder having a female threaded fastening section, the male threaded fastening section being provided at the rear of the cutting edge section in an axial direction; and a notch to be attached to the holder, the notch being provided between the cutting edge section and the male threaded fastening section, wherein a thread ridge of the male threaded fastening section comprises:
a flank surface of a pressure flank;a flank surface of a clearance flank; anda crest surface and a root surface connecting two types of flank surfaces wherein,a flank angle of the pressure flank is provided to be larger than the flank angle of a clearance flank.