Actuated material removal tool
AssigneeSandvik AB
InventorKevin Nedzlek
Life of this patent
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Abstract
Material removal tool (310) with a translating bar (360) having an actuation surface (362) shaped as a cone or frustum, wherein an axial position of the cone or frustum along a length of the translating bar (360) corresponds to a position of a push rod (364) in operable contact with flexibly mounted cartridges (312) on which cutting inserts (316) are mounted is disclosed. The translating bar (360) is actuated between a first and second position to place different combinations of cutting inserts (316) from different cutting positions (a-d) in a radially outermost position. Various combinations of cutting positions (a-d) and cutting inserts (316) are disclosed along with various methods for removing material using the disclosed material removal tool (310).
Claims21
A material removal tool, comprising:
- a housing body including a connector at a mating end;
- a piston head in an actuating chamber internal to the housing body;
- a translating bar including two or more actuation surfaces;
- a plurality of support pads at a distal end from the connector, the plurality of support pads oriented axially at various radial positions around the circumference of the distal end;
- a first delimiting structure and a second delimiting structure, wherein the second delimiting structure is an adjustable positive stop that limits axial movement of the translating bar in a first direction, wherein the material removal tool is configured to vary a limit of the axial movement of the translating bar in the first direction by adjustment of the adjustable positive stop;
- and
- two or more cutting positions arranged axially along a length of the material removal tool between the connector and the plurality of support pads,
- wherein the two or more cutting positions define an active portion of the material removal tool,
- wherein each cutting position includes a first flexibly mounted cartridge, the first flexibly mounted cartridge including at least one seating pocket for a cutting insert,
- wherein the translating bar includes a first end operably connected to the piston head to axially translate between a first position and a second position when the piston head translates,
- wherein in the first position, the active portion has an active volume determined by a greatest radial extent of the housing body in the active portion and a radially outermost surface of a cutting insert seated in the seating pocket on the first flexibly mounted cartridge is radially inward from a surface of the active volume,
- wherein in the second position, the radially outermost surface of the cutting insert seated in the pocket on the first flexibly mounted cartridge is radially outward from the surface of the active volume, and
- wherein the two or more actuation surfaces include a cone or frustum, wherein an axial position of a first actuation surface along a length of the translating bar corresponds to a position of a push rod in operable contact with the first flexibly mounted cartridge from a first cutting position and an axial position of a second actuation surface along a length of the translating bar corresponds to a position of a push rod in operable contact with the first flexibly mounted cartridge from a second cutting position.
A method for removing material from a workpiece with a rotating material removal tool, the material removal tool including a translating bar and two or more cutting positions arranged axially along a length of the material removal tool between a connector and a plurality of support pads, wherein each cutting position includes a first flexibly mounted cartridge, the first flexibly mounted cartridge including at least one seating pocket for a cutting insert, the material removal tool further including a first delimiting structure and a second delimiting structure, wherein the second delimiting structure is an adjustable positive stop, the method comprising:
- inserting at least the cutting positions through an opening into an interior of the workpiece to insert at least a portion of the plurality of support pads into a pre-existing bore hole;
- actuating the translating bar of the material removal tool to move a portion of the cutting insert mounted in the seating pocket of the first flexibly mounted cartridge of the two or more cutting positions radially outward;
- limiting an axial movement of the translating bar in a first direction by adjusting the adjustable positive stop, wherein the material removal tool is configured to vary a limit of the axial movement of the translating bar in the first direction by adjusting the adjustable positive stop;
- and
- rotating the material removal tool to remove material from the interior of the workpiece,
- wherein the translating bar includes two or more actuation surfaces,
- wherein the two or more actuation surfaces include a cone or frustum, wherein an axial position of a first actuation surface along a length of the translating bar corresponds to a position of a push rod in operable contact with the first flexibly mounted cartridge from a first cutting position and an axial position of a second actuation surface along a length of the translating bar corresponds to a position of a push rod in operable contact with the first flexibly mounted cartridge from a second cutting position, and
- wherein the plurality of support pads are oriented axially at various radial positions around the circumference of a distal end of the material removal tool.
Dependencies are inferred from the claim text.