| 摘要 |
A cutting tool includes a cutting insert releasably retained therein. The cutting insert has top and bottom surfaces and a peripheral surface extending therebetween. The cutting insert does not include any clamping bore for receiving a clamping component therein. The cutting insert may having unitary, one-piece construction and be formed of a superabrasive material. The cutting insert may have a two-headed arrow shape, or similar shapes, such that the body of the cutting insert is small relative to the cutting regions thereof. The cutting tool includes a top clamp for clamping the cutting insert in an insert pocket. The top clamp has an asymmetrical shape and engages the cutting insert in one engagement region on the top surface, and in one engagement region on the peripheral surface. The cutting insert engages the insert pocket at the bottom surface, and in three spaced apart engagement regions on the peripheral surface. |
| 主权项 |
1. A cutting tool holder, comprising:
a cutting tool body having an insert pocket formed at a front end thereof for releasably receiving a cutting insert therein, an upper surface, and a sloping surface; and a top clamp releasably connected to the cutting tool body for securing a cutting insert in the insert pocket, wherein the top clamp comprises:
a through-bore for receiving therein a securing member to secure the top clamp to the cutting tool body, the through-bore having a central axis;a bottom surface having a front portion, a first rear corner and a second rear corner;an inclined sliding surface formed at the first rear corner, for slidingly engaging the sloping surface of the tool body;a top engagement surface formed at the front portion, for engaging a top surface of a cutting insert;an insert-side engagement surface extending downwardly at the front portion, for engaging a peripheral surface of a cutting insert; anda supporting boss projecting downwardly from the second rear corner, for engaging the upper surface of the tool body and directing clamping forces to the front portion; wherein:an imaginary plane (P) which extends through the top clamp, passes through the top engagement surface and includes the central axis of the through-bore, divides the top clamp such that the sliding surface is entirely located on one side of the imaginary plane (P), and the supporting boss and the insert side engagement surface are entirely located on an opposite side of the imaginary plane (P). |
