接続切れ刃

US11285550(TUNGALOY CORP [JP])
[0005] When installing the cutting insert to the body with the top and bottom having been reversed so that this rake face is the face in contact with the body, the cutting insert may be attached to the body at a posture deviated from the initially intended posture if the rake face has been damaged due to abrasion by chips.
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  切りくずが擦過してすくい面が損傷すると、当該すくい面がボデーとの当接面になるように切削インサートの上下を反転させてボデーに設置したとき、本来想定していた姿勢からずれた姿勢で切削インサートがボデーに取り付けられるおそれがある。

If the posture of the cutting insert attached to the body changes, cutting performance, state of the machining surface, and so forth, also change in a corresponding manner.
ボデーに取り付けられた切削インサートの姿勢が変化すると、それに伴って切削性能や加工面の状態等も変化する。

With the foregoing in view, it is an object of the present invention to provide a cutting insert where there is little damage to the rake face.
そこで、本発明は上記の課題に鑑み、すくい面の損傷が小さい切削インサートを提供することを目的とする。

[0006] A cutting insert according to an aspect of the present invention includes a major cutting edge, a minor cutting edge, and a connecting cutting edge that connects the major cutting edge and the minor cutting edge,
本発明の一態様に係る切削インサートは、主切れ刃と、副切れ刃と、主切れ刃と副切れ刃とを接続する接続切れ刃と、を備え、

includes a first minor cutting edge flank of which a clearance angle of a flank corresponding to the minor cutting edge is 0°, and a second minor cutting edge flank that connects to the first minor cutting edge flank and that has a clearance angle of a negative value,
副切れ刃に対応する逃げ面の逃げ角が０°である第１の副切れ刃逃げ面と、第１の副切れ刃逃げ面に接続してその逃げ角が負の値である第２の副切れ刃逃げ面と、を有し、

and includes a first connecting cutting edge flank of which a clearance angle of a flank corresponding to the connecting cutting edge is 0° or greater,
接続切れ刃に対応する逃げ面の逃げ角が０°以上の第１の接続切れ刃逃げ面と、

and a second connecting cutting edge flank that connects to the first connecting cutting edge flank and has a clearance angle that is greater than the clearance angle of the first connecting cutting edge flank.
第１の接続切れ刃逃げ面に接続し第１の接続切れ刃逃げ面の逃げ角よりも大きい逃げ角を持つ第２の接続切れ刃逃げ面と、を有する。