DRILLING CHIP AND EXCAVATION TOOL

To suppress decrease in drilling efficiency and to reduce cost of re-polishing by suppressing the development of the wear width of the tip of the tip body of a drilling chip.SOLUTION: A drilling chip mounted on the tip surface of a tool body of an excavation tool that is rotated around an axis and to which a striking force is applied in the axial direction comprises a cylindrical base 2 and a chip body 1 integrally formed with a tip 3 that protrudes from the base 2 to the tip side, the tip 3 includes a convex curved surface portion 4 projecting to the tip side of the tip body 1 and a protruding portion 5 extending in the diameter direction relative to a center line C of the base 2 seen from the tip side of the tip body 1 and projecting further from the surface of the convex curved surface portion 4 to the tip side.SELECTED DRAWING: Figure 1 【課題】掘削チップのチップ本体の先端部の摩耗幅の進展を抑えることによって削孔効率の低下を抑制するとともに再研磨加工のコストを削減する。【解決手段】軸線回りに回転させられるとともに軸線方向先端側に打撃力が与えられる掘削工具の工具本体の先端面に取り付けられる掘削チップであって、円柱状の基端部２と、この基端部２から先端側に突出する先端部３とが一体に形成されたチップ本体１を備え、先端部３は、チップ本体１の先端側に突出する凸曲面状部４と、チップ本体１の先端側から見て基端部２の中心線Ｃに対する直径方向に延びて凸曲面状部４の表面からさらに先端側に突出する突条部５とを備えている。【選択図】図１