| 摘要 |
<p>The present invention discloses a cutting insert being capable of radiating effectively heat generated during the cutting machining process and having a structure by which a sufficient surface area is in contact with a tool holder and cutting fluid can be smoothly flowed. The cutting insert according to the present invention comprises an upper face and a lower face being opposite to each other, a plurality of side faces connecting the upper face and the lower face and a through hole passing through the upper face and the lower face, the upper face being divided into a periphery region disposed adjacently to cutting edges formed by the upper face and the side faces, and a central protruded region disposed between the through hole and the periphery region and surrounding the through hole, the central protruded region being placed higher than the edges. Here, the periphery region is formed along all the cutting edges and comprising an descent face inclined downward from the cutting edge to the central protruded region, a bottom face and an ascent face inclined upward from the bottom face to the central protruded region, and a plurality of grooves are formed on the central protruded region of the upper face, the groove being formed such that both ends of respective groove are directed to the adjacent cutting edges.</p> |
