Tool and method for mechanical roughening

A device for generating a roughening profile on an inner surface of a bore in a work piece, the device being designed as a combined chipping and forming tool, with a cutting tool, which is used for chipping with a geometrically defined blade for generating a pre-form of a roughening profile and with a tool, which is used for forming the pre-form of the roughening profile, wherein these tools can be fed in a radial direction, the device comprising:

• a first tool having at least one geometrically defined blade;
• a second tool disposed, in a feed direction, downstream of the first tool, wherein said second tool is a cutting tool;
• and
• a third tool disposed downstream of said second tool, said third tool structured for forming the pre-form of the roughening profile generated by said first and said second tools, wherein said third tool comprises a rotationally mounted roller having an axis of rotation that encloses an angle alpha with respect to a feed direction of the device, said angle alpha being selected to match a slope resulting from a feed of the device when machining the bore, thereby guaranteeing a mere rolling function of said roller without slippage or sliding between the work piece and the roller.