Method and tool for roughening a cylinder bore wall to be coated, and component for guiding a cylinder piston

A method for roughening a cylinder bore wall to be coated, the method comprising the following steps:

• providing a component having a cylinder bore and a cylinder bore wall extending around a central longitudinal axis;
• producing at least one groove, extending around the central longitudinal axis in the cylinder bore wall, and at least one associated groove web, such that the at least one associated groove web, in a radial direction, directed toward the central longitudinal axis, forms first undercuts for a coating which is to be applied;
• producing axial grooves, extending transversely to the at least one groove in the cylinder bore wall, such that the at least one associated groove web forms respective second undercuts for the coating which is to be applied in a peripheral direction about the central longitudinal axis, and the at least one associated groove web beside at least one of the axial grooves forms at least one material projection, the at least one material projection extending into the at least one groove and, the at least one material projection forming a respective further undercut in the peripheral direction for the coating which is to be applied;
• moving a tool for producing the axial grooves, having at least one deformation roller, along the central longitudinal axis;
• and
• rotating the at least one deformation roller about a rotational axis, extending transversely to the central longitudinal axis, such that on the cylinder bore wall the at least one deformation roller plastically deforms the cylinder bore wall for producing the axial grooves.