Roughening tool and method for roughening a cylindrical surface

A method for roughening a cylindrical surface of a bore in a particularly metallic workpiece, by producing a defined microstructure that is composed of a plurality of microgrooves extending circumferentially at an axial distance from one another by means of a roughening tool that comprises a plurality of cutting elements, which are arranged at an axial distance from one another and respectively comprise a plurality of cutting teeth arranged at an axial distance from one another, over an axial length that is greater than or equal to the length of the cylindrical surface to be machined, the method comprising the following sequence of steps:

• introducing a roughening tool into the bore along the bore axis,
• moving the rotating roughening tool radially outward until the cutting teeth of the cutting elements of the roughening tool cut into the cylindrical surface of the bore up to a defined depth,
• circulating the rotating roughening tool along a 360° orbit about the bore axis,
• moving the roughening tool radially inward, and
• retracting the roughening tool from the bore along the bore axis.