| 摘要 |
The insert for use of an endmilling is constructed by a land area extended to an inner side from a corner cutting edge and a principal cutting edge formed by a connection part between an exterior wall face and an upper surface, a drop wall extended from the land area to an inner side thereof, an electroforming type projection wall disposed in the drop wall, an elevation wall disposed in the inside of the drop wall, and a bulge structure disposed near to the corner cutting edge, thereby obtaining a smooth ejection of chips and reinforcing a strength of a cutting edge without an increase of a cutting resistance in a principal cutting edge.
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