| 摘要 |
PURPOSE: To improve the connection stability of assembling parts of a tool against stress at the time of machining by bringing body support faces and holder support faces into contact with each other when guide lugs are inserted into a groove. CONSTITUTION: Doglegged protruded top faces deleted with an apex by a groove are formed on a pair of inclined faces 13, 13' at the apex of a tool body 1, and doglegged recesses protruded with guide lugs 14' downward from the integrated apex are formed on the inclined faces 17' of both holders 5, 5' corresponding to the doglegged top faces. The relative rotating force to the tool body 1 generated on both holders 5, 5' starting from an insert receives the resistance by the cooperation of the doglegged holder recesses and the doglegged body protruded top faces coupled with the recesses. The stability of the fixed state of both holders 5, 5' to the tool body 1 is sufficiently secured, and the screwing stability of a bolt is secured. |
