| 摘要 |
A cutting tool (10) includes a toolholder (12) and a cutting insert (14) removably securable in the toolholder. The cutting insert (14) includes a lower clamping surface (18) with a V-shaped clamping surface (32, 34) on each side of a central portion (28). The toolholder includes a lower clamping surface (56) with an inverted V-shaped clamping surface (62, 64) on each side of the bottom surface (60) formed by a primary clamping surface (62a, 64a) and a secondary clamping surface (62b, 64b). The secondary clamping surfaces (32b, 34b) of the cutting insert (14) contacts the secondary clamping surfaces (62b, 64b) of the toolholder (12) when the cutting tool (10) is brought into a clamped position due to interference between the toolholder (12) and the cutting insert (14), thereby providing a minimum of four clamping surfaces when in the clamped position. |
| 主权项 |
1. A cutting tool (10), comprising:
a toolholder (12) and a cutting insert (14) removably securable in the toolholder; the cutting insert comprising:
upper and lower clamping surfaces (16, 18), peripheral side surfaces (20) extending between the upper and lower surfaces (16, 18) and front and rear end surfaces (22, 24) extending between the peripheral side surfaces (20) with a longitudinal axis (26) passing therebetween, the lower clamping surface (18) of the cutting insert including a central portion (28) and a V-shaped clamping surface (32, 34) on each side of the central portion (28), each V-shaped clamping surface (32, 34) formed by a primary clamping surface (32a, 34a), a secondary clamping surface (32b, 34b) and a vertex (32c, 34c) therebetween; the toolholder comprising:a head portion (48) with an insert-receiving slot (50) opening out to a forward end (52) of the toolholder, the head portion (48) including an upper clamping surface (54) and a lower clamping surface (56), the lower clamping surface (56) including a central portion (58) with a substantially planar bottom surface (60) and an inverted V-shaped clamping surface (62, 64) on each side of the bottom surface (60), each inverted V-shaped clamping surface (62, 64) formed by a primary clamping surface (62a, 64a), a secondary clamping surface (62b, 64b) and a vertex (62c, 64c) therebetween, wherein the primary clamping surfaces (32a, 34a) of the cutting insert (14) contacts the primary clamping surfaces (62a, 64a) of the toolholder (12) and a gap (76) exists between the secondary clamping surfaces (32b, 34b) of the cutting insert (14) and the secondary clamping surfaces (62b, 64b) of the toolholder (12) due to a difference in width between the V-shaped clamping surfaces (32, 34) of the cutting insert (14) and the inverted V-shaped clamping surfaces (62, 64) of the toolholder (12) when the cutting tool (10) is in the unclamped position, and wherein the secondary clamping surfaces (32b, 34b) of the cutting insert (14) contacts the secondary clamping surfaces (62b, 64b) of the toolholder (12) when the cutting tool (10) is brought into a clamped position due to interference between the toolholder (12) and the cutting insert (14), thereby providing a minimum of four clamping surfaces when in the clamped position. |
