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US5911548: Tool for the production of arc-shaped grooves

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Filing Information

Inventor(s) Siegfried Deiss · Rolf Huber · Rolf Vollmer ·
Assignee(s) Walter AG ·
Attorney/Agent(s) Frishauf, Holtz, Goodman, Langer & Chick, P.C. ·
Primary Examiner Daniel W. Howell ·
Assistant Examiner Adesh Bhargava ·
Application Number US8803386
Filing date 02/20/1997
Issue date 06/15/1999
Predicted expiration date 02/20/2017
U.S. Classifications 409/234  · 407/12  ·
International Classifications B23D 700  ·
Kind CodeA
International Classifications 409234 ·
Related U.S. Application DataReference to related patent and application, the disclosure of which is hereby incorporated by reference: U.S. Pat. No. 3,859,700, Jilbert.
U.S. application Ser. No. 08/803,389, filed Feb. 20, 1997, DAUB.
Foreign Priority DE19607230 - 02/27/1996 ·
19 Claims, No Drawings


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.

Independent Claims | See all claims (19)

  1. 1. 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'), andfastening 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.
  2. 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'); andfastening 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, andwherein 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).
  3. 18. 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'); andfastening 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, andwherein the cutting plates (21, 21', 21") are arranged solely on an outer peripheral side of the ring-shaped support section (14).
  4. 19.19. 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'); andfastening 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; andwherein the cutting plates (21, 21', 21") are arranged solely on an inner peripheral side of the ring-shaped support section (14).

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US1472960 O K TOOL COMPANY Conklin Nov 1923
US3716900 INGERSOLL MILLING MACHINE CO Erkfritz Feb 1973
US3859700 ILLINOIS TOOL WORKS Jilbert Jan 1975
US4182587 Ingersoll Maschinen und Werkzeuge GmbH Striegl Jan 1980
US4645384 Mitsubishi Kinzoku Kabushiki Kaisha Shimomura et al. Feb 1987
US4790693 Ingersoll Cutting Tool Company Koblesky Dec 1988
US4808044 Mitsubishi Kinzoku Kabushiki Kaisha Tsujimura et al. Feb 1989
US4993891 General Motors Corporation Kaminiski et al. Feb 1991
US5033916 Feldmuehle Aktiengesellschaft Dunklau Jul 1991
US5176500 Westinghouse Electric Corp. Henig Jan 1993
US5542792 Waukesha Cutting Tools, Inc. Krueger et al. Aug 1996
US5542794 Kennametal Inc. Smith et al. Aug 1996

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
FR2270045ILLINOIS TOOL WORKSDec 1975
DE3727968MITSUBISHI METAL CORPFeb 1988

Other Publications

"Methoden und Maschinen zur Frasbearbeitung von Generator- und Turbinenrotoren" (Methods and Machines for Milling Generator and Turbine Rotors), Ing. (grad.) Siegfried Neumann, Special Publication No. 9 of Kollman Maschinenbau GmbH, 5602 Langenberg/Rhld, (1969).

Patent Family

Document NumberAssigneeInventorsIssue/Pub Date
DE19607230 WALTER AG DEISS SIEGFRIED et al. Feb 1997
CN1159966 WALTER AG DEISS SIEGFRIED et al. Sep 1997
US5911548 Walter AG Siegfried Deiss et al. Jun 1999
EP0792709 WALTER AG Siegfried Deiss et al. Apr 2002
RU2189297 WALTER AG DEISS SIEGFRIED et al. Sep 2002
IN188488 WALTER AG DEISS SIEGFRIED et al. Oct 2002
JP3673358 Jul 2005