| 摘要 |
A cutting tool assembly (1, 101) for rotary cutting, operations comprising a replaceable cutting head (2, 102) and a tool shank (4, 104) having a common longitudinal axis (6, 106) and mating peripheral surfaces (1 6, 43, 120). The cutting head has a cutting head mounting portion (14, 114) at a trailing end (15, 130) thereof and the tool shank has a cutting head receiving portion (44, 144) at a front face thereof. The cutting head mounting portion (14, 114) and the cutting head receiving portion (44, 144) of the tool shank each have at least two coupling portions (20, 120) bound by associated peripheral surface of the cutting head (2, 102) and the tool shank (4, 104) and mating in shape and dimensions. Each coupling portion has a base surface (22, 48, 122, 148), a torque transmission wall (26, 52, 126, 152) and a fixation wall (28, 54, 128, 154), the fixation wall of each cutting he ad coupling portion having an angular extension smaller than a corresponding angular distance between adjacent extremities of the fixation walls of two different tool shank coupling portions. |
