SURFACE ROUGHENING TOOL, SURFACE ROUGHENING METHOD USING THE SURFACE ROUGHENING TOOL AND SURFACE ROUGHENED PRODUCT

摘要

To provide a surface roughening tool and a surface roughening method using the surface roughening tool which performs surface fastening processing of a high anchor effect while preventing a cutting blade from being damaged.SOLUTION: A surface roughening tool includes a preceding blade group 8 comprising at least one preceding blade 8a, 8b protruded to an outer circumference of a tool main body 1 rotated in a tool rotation direction T around an axial line O and a succeeding blade group 9 comprising at least one succeeding blade 9a which succeeds to the preceding blade group 8 and is protruded to the outer circumference of the tool main body 1. Therein, the preceding blade group 8 forms a spiral first groove part at an interval in an axial line O direction on a cross section along an axial line O, on an inner circumferential surface of a processing hole, at the same time, the succeeding blade group 9 forms a second groove part between two first groove parts adjacent in the axial line O direction and a radial directional rake angle of the succeeding blade 9a is 0° or a negative angle.SELECTED DRAWING: Figure 2