Tool for the production of arc-shaped grooves
AssigneeWalter AG
InventorsSiegfried Deiss, Rolf Huber, Rolf Vollmer
Life of this patent
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Abstract
To form undercut grooves in a work piece, especially to retain turbine rotor blades, in a first step, the grooves are cut such that the flanks of the grooves have a preliminarily desired shape; then, in a second step, a bell-type countersink is moved radially to cut the desired shape of the flanks of the groove. Countersink cutters for the second step include a plurality of groups of cutting bits or inserts secured to posts on a shell, or bell-type countersink, in accordance with the profile to be cut.
Claims19
Bell-type countersink (11) for machining arc-shaped grooves (3) in work pieces (1) which are cylindrical at least in sections, having a tool base body (12), which has a ring-shaped support section (14) arranged coaxially to a rotational axis (9),
- and comprising:
- plate seats (19) formed on the support section (14, 16);
- at least one group of indexable and reversible cutting plates (21, 21'), and
- fastening means (24) for receiving and retaining the cutting plates (21, 21', 21"),
- wherein on rotation of the tool base body (12) about the rotational axis (9) said reversible cutting plates (21, 21', 21") define with their active cutting edges a peripheral outline coaxial to the rotational axis,
- wherein said plates are secured on the support section (14, 16) to form, in operation, in the direction of the rotational axis (9), at least one undercut, and wherein the peripheral outline defined by the cutting edges of the reversible cutting plates (21, 21', 21") is a ring surface stepped or undulated in an axial direction.
Bell-type countersink (11) for machining arc-shaped grooves (3) in work pieces (1) which are cylindrical at least in sections, having a tool base body (12), which has a ring-shaped support section (14) arranged coaxially to a rotational axis (9), comprising:
- plate seats (19) formed on the support section (14, 16);
- at least one group of indexable and reversible cutting plates (21, 21');
- and
- fastening means (24) for receiving and retaining the cutting plates (21, 21', 21"),
- wherein on rotation of the tool base body (12) about the rotational axis (9) said reversible cutting plates (21, 21', 21") define with their active cutting edges a peripheral outline coaxial to the rotational axis,
- wherein said plates are secured on the support section (14, 16) to form, in operation, in the direction of the rotational axis (9), at least one undercut, and
- wherein the cutting plates (21, 21', 21") are arranged on the support section (14) in grouped rows respectively extending obliquely to the direction of rotation of the tool base body (12).
Bell-type countersink (11) for machining arc-shaped grooves (3) in work pieces (1) which are cylindrical at least in sections, having a tool base body (12), which has a ring-shaped support section (14) arranged coaxially to a rotational axis (9), comprising:
- plate seats (19) formed on the support section (14, 16);
- at least one group of indexable and reversible cutting plates (21, 21');
- and
- fastening means (24) for receiving and retaining the cutting plates (21, 21', 21"),
- wherein on rotation of the tool base body (12) about the rotational axis (9) said reversible cutting plates (21, 21', 21") define with their active cutting edges a peripheral outline coaxial to the rotational axis,
- wherein said plates are secured on the support section (14, 16) to form, in operation, in the direction of the rotational axis (9), at least one undercut, and
- wherein the cutting plates (21, 21', 21") are arranged solely on an outer peripheral side of the ring-shaped support section (14).
Bell-type countersink (11) for machining arc-shaped grooves (3) in work pieces (1) which are cylindrical at least in sections, having a tool base body (12), which has a ring-shaped support section (14) arranged coaxially to a rotational axis (9) comprising:
- plate seats (19) formed on the support section (14, 16);
- at least one group of indexable and reversible cutting plates (21, 21');
- and
- fastening means (24) for receiving and retaining the cutting plates (21, 21', 21");
- wherein on rotation of the tool base body (12) about the rotational axis (9) said reversible cutting plates (21, 21', 21") define with their active cutting edges a peripheral outline coaxial to the rotational axis;
- wherein said plates are secured on the support section (14, 16) to form, in operation, in the direction of the rotational axis (9), at least one undercut;
- and
- wherein the cutting plates (21, 21', 21") are arranged solely on an inner peripheral side of the ring-shaped support section (14).
Dependencies are inferred from the claim text.