ROUGHENING METHOD, CUTTING TOOL AND CYLINDRICAL MEMBER

摘要

PROBLEM TO BE SOLVED: To improve adhering force of an another member on a surface of a cylindrical member cut in a screw shape and roughened.

SOLUTION: A cylinder bore part 3 is roughened by rotating and moving a cutting tool 7 so as to move the cutting tool 7 along its circumferential direction while delivering the cutting tool 7 in its axial direction and cutting a cylinder bore inner surface 5 in the screw shape. A cutting blade 7a of the cutting tool 7 has a horizontal surface 7c to match a normal M of the cylinder bore inner surface 5 and an inclined surface 7b positioned on the rear side in the tool delivering direction, and a shape of a trough part 23 between crest parts 19, 19 of a screw shape part is machined so that a central line L of an angle θ made by flanks 23a on both sides comes to be in a state inclined against the normal M direction of the cylinder bore inner surface 5.

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