Face grooving tool

• US 4,332,513 A
• Filed: 07/24/1980
• Issued: 06/01/1982
• Est. Priority Date: 07/24/1980
• Status: Expired due to Term

• Current Assignee: Carboloy Incorporated
• Original Assignee: General Electric Company
• Inventors: Gowanlock, Thomas W.
• Primary Examiner(s): Vlachos, Leonidas
• Application Number:
  US06/171,944
• Time in Patent Office: 677 Days
• Field of Search: 407/101, 407/107, 407/109, 407/111, 407/112, 407/117, 407/120, 407/65, 407/64, 407/66, 82/1, 82/36, 82/37, 82/11, 82/18, 408/204, 408/205, 408/206, 408/207, 408/67, 408/68, 408/703, 408/239 R, 408/241
• US Class Current: 407/101
• CPC Class Codes: B23B 2210/08 Tools comprising intermediary toolholders
• CPC Class Codes: B23B 2220/126 Producing ring grooves
• CPC Class Codes: B23B 27/04 Cutting-off tools B23B27/08 takes precedence ; toolholders for cutting-off inserts B23B29/043
• CPC Class Codes: Y10S 408/703 Trepanning
• CPC Class Codes: Y10T 407/227 with separate means to fasten tool seat to holder
• CPC Class Codes: Y10T 407/2282 including tool holding clamp and clamp actuator
• CPC Class Codes: Y10T 407/28 Miscellaneous
• CPC Class Codes: Y10T 82/2585 Tool rest

Abstract

A face grooving tool is disclosed for machining circular grooves in a metal workpiece. More particularly, a face grooving tool includes an elongated shank having an arcuate support blade projecting axially outwardly from one end thereof. The leading surface of the support blade includes an offset V-groove configuration, with the vertex thereof being located nearer to the radially inner surface of the support blade than the radially outer surface. By this arrangement, the radially outermost portion of a cutting insert, which is receivable in the offset groove, is provided with added support during a cutting operation. The arcuate configuration of the support blade enables the blade to be received in the circular groove being machined in the workpiece thereby providing continuous support for the insert.

Claims

1. A tool for machining circular grooves in a workpiece comprising:

an elongated shank member;

an arcuate support blade projecting axially outwardly from one end of said shank member, said support blade being defined by opposed radially inner and outer arcuate surfaces and opposed leading and trailing surfaces, with the longitudinal axes of said arcuate surfaces being parallel to the longitudinal axis of said shank member, said arcuate support blade having a radius of curvature substantially corresponding to the radius of curvature of the circular groove to be machined, and with the leading surface of said support blade including a V-shaped support groove defined by radially inner and outer planar sides coinciding in a vertex, with the radially outer planar side of said support groove being longer than the radially inner side, and with said vertex being disposed closer to said radially inner surface than to said radially outer surface of said support blade;

an elongated cutting insert having opposed leading and trailing surfaces, with the leading surface thereof being planar and with the trailing surface having a configuration substantially corresponding to the configuration of said V-shaped support groove of said support blade and being adapted to be received therein with one end of said insert projecting axially outwardly beyond said support blade; and

clamping means, removably connected to said shank member and having a bearing arm abutting the planar leading surface of said insert for maintaining said insert in said V-shaped support groove whereby in the operation of said tool the workpiece is rotated relative to said tool such that said projecting end of said insert machines a circular groove therein, with said arcuate support blade being adapted to fit within said machined groove thereby giving continuous support to said insert, and with said V-shaped groove functioning to give added support to the radially outermost portion of said insert.

2. A tool as recited in claim 1 wherein the width of said arcuate support blade, between said opposed arcuate surfaces, from said leading surface to said trailing surface, is constant.

3. A tool as recited in claim 1 wherein the width of said bearing arm of said clamping means is less than the width of said insert.

4. A tool as recited in claim 1 wherein the radially outermost portion of said bearing arm is tapered such that at least a portion thereof is receivable in said circular groove during a machining operation enabling the reach out over said insert to be increased.

5. A tool as recited in claim 1 wherein said support blade is formed integrally with an insert holder member, said insert holder member being removably connected to said shank member.

6. A tool as recited in claim 5 wherein said insert holder member is mounted to said shank member via screw means.

7. A tool as recited in claim 5 wherein said shank member includes an L-shaped cut out defining a pair of orthogonally related walls, one of said walls including a pair of spaced apart locating rails.

8. A tool as recited in claim 7 wherein one side of said insert holder member is provided with a longitudinally extending detent adapted to be received in a channel defined between said spaced apart locating rails such that said insert holder member is stabilized when connected to said tool.

9. A tool as recited in claim 5 wherein said clamping means includes a downwardly extending detent and wherein said insert holder member includes a slot disposed on the upper surface thereof with said detent of said clamping means being receivable in said slot to localize said clamping means and stabilize said insert.

10. A tool for machining circular grooves in a workpiece comprising:

an elongated shank member;

an arcuate support blade projecting axially outwardly from one end of said shank member, said support blade being defined by opposed radially inner and outer arcuate surfaces and opposed leading and trailing surfaces, with the longitudinal axes of said arcuate surfaces being parallel to the longitudinal axis of said shank member, said arcuate support blade having a radius of curvature substantially corresponding to the radius of curvature of the circular groove to be machined, with the width of said support blade, between said opposed arcuate surfaces, from said leading edge to said trailing edge, being constant, and with the leading surface of said support blade including a V-shaped support groove defined by radially inner and outer planar sides coinciding in a vertex, with the radially outer planar side of said support groove being longer than the radially inner side, and with said vertex being disposed closer to said radially inner surface than to said radially outer surface of said support blade;

an elongated cutting insert having opposed leading and trailing surfaces, with the leading surface thereof being planar and with the trailing surface having a configuration substantially corresponding to the configuration of said V-shaped support groove of said support blade and being adapted to be received therein with one end of said insert projecting axially outwardly beyond said support blade; and

clamping means, removably connected to said shank member and having a bearing arm abutting the planar leading surface of said insert for maintaining said insert in said V-shaped support groove, with the width of said bearing arm being less than the width of said insert, and with the radially outermost portion of said bearing arm being tapered, whereby in the operation of said tool the workpiece is rotated relative to said tool such that said projecting end of said insert machines circular groove therein, with said arcuate support blade and at least a portion of said bearing arm being adapted to fit within said machined groove thereby giving continuous support to said insert and with said V-shaped groove functioning to give added support to the radially outermost portion of said insert.