Method and tool for producing a surface of predetermined roughness

A device, comprising:

• a tool;
• and
• a cutting insert comprising a first portion and a second portion, the first portion comprising a base plate mounted to the tool, the second portion comprising cutting teeth that each comprise a proximal end and a distal end, each proximal end of each cutting tooth being attached to the base plate,
• the cutting insert mounted on the tool,
• the tool configured to rotate the cutting insert relative to a tool axis,
• the cutting insert comprising:
• at least a first projection and a second projection, the first projection spaced from the second projection along a line that is parallel to the tool axis,
• the first projection is a dovetail cutting tooth,
• the second projection is a displacement structure,
• the first projection extending away from the tool axis in a first direction, the first direction perpendicular to the tool axis,
• the second projection extending away from the tool axis in said first direction,
• the first projection having a first tooth first flank and a first tooth second flank,
• an axis of the first projection extending between the first tooth first flank and the first tooth second flank,
• the axis of the first projection perpendicular to the tool axis,
• a spacing between the first tooth first flank and the first tooth second flank at a first distance from the tool axis greater than a spacing between the first tooth first flank and the first tooth second flank at a second distance from the tool axis, the first distance from the tool axis greater than the second distance from the tool axis.

Tool for producing a cylindrical surface that has a surface structure of predetermined geometry suitable for application of material by thermal spraying, with which at least one geometrically determined groove structure, which is helical and has a determined groove pitch, can be introduced into a cylindrical substrate surface, said tool being embodied as a follow-on tool, with which a groove cross-section can be processed successively to a finished size,

• the tool comprising a cutting insert comprising a first portion and a second portion, the first portion comprising a base plate mounted to the tool, the second portion comprising cutting teeth that each comprise a proximal end and a distal end, each proximal end of each cutting tooth being attached to the base plate, wherein the cutting teeth are comb-like, sequentially arranged and of different cross-sections, said teeth comprising at least one pre-machining tooth and at least two subsequent shaping teeth, wherein the groove structure can be introduced into the cylindrical substrate surface by only rotating at least one of the tool and the cylindrical substrate surface about a tool axis that is coaxial with an axis of the cylindrical substrate surface such that a relative rotational movement between the tool and the cylindrical substrate surface is generated, and moving at least one of the tool and the cylindrical substrate surface along the tool axis such that an axial relative displacement between the tool and the cylindrical substrate is generated, in that first, by means of at least one leading groove pre-machining tooth, a base groove with a groove bottom width that is less than the groove bottom width of the finished groove can be introduced, and in that via subsequent shaping teeth, which are displaced to each other by the groove pitch or by a multiple of the groove pitch, this base groove can be further processed by a cutting action in that an undercut of the grooves introduced into the surface is created on at least one side or flank of the groove introduced into the substrate.