Compensator for multi-tool boring bar

A method for radially adjusting a position of a plurality of tool cartridges of a machine tool having rotatable, concentric, elongate, inner and outer drive spindles with a plurality of pockets formed in the outer drive spindle exposing a portion of the inner drive spindle, the method comprising the steps of:

• moving a wedge disposed in each pocket relative to the longitudinal axis of the elongate inner drive spindle in response to relative rotation of the inner drive spindle with respect to the outer drive spindle when the inner drive spindle is in a predetermined selectable position with respect to each pocket;
• operably engaging a threaded external surface of a rotatable member disposed in each pocket to move the rotatable member longitudinally in response to rotation of the rotatable member with respect to the outer drive spindle;
• selectively operably engaging the rotatable member with a portion of the inner drive spindle when the inner drive spindle is in an operable longitudinal position corresponding to each pocket;
• and
• radially moving a tool cartridge operably engaged within each pocket of the outer drive spindle relative to the longitudinal axis of the spindle in response to relative movement of the corresponding wedge.

An apparatus for radially adjusting a position of a tool cartridge comprising:

• a machine tool having rotatable, concentric, elongate, inner and outer derive spindles with a plurality of pockets formed in the outer drive spindle exposing a portion of the inner drive spindle;
• a wedge disposed in each pocket for movement relative to the longitudinal axis of the elongate inner drive spindle in response to relative rotation of the inner drive spindle with respect to the outer drive spindle when the inner drive spindle is in a predetermined selectable position with respect to each pocket;
• a rotatable member disposed in each pocket operably connected to the wedge and being selectively operably engageable with a portion of the inner drive spindle to cause rotation of the rotable member in response to rotation of the inner drive spindle with respect to the outer drive spindle when the inner drive spindle is in the predetermined selectable position with respect to each pocket, the rotatable member having a threaded external surface operably engagable to move the rotatable member longitudinally in response to rotation of the rotatable member;
• a tool cartridge operably engaged within each pocket of the outer drive spindle for radial movement relative to the longitudinal axis of the spindle in response to relative movement of the corresponding wedge;
• and
• a ring spring for urging each tool cartridge to operably engage the corresponding wedge.

An apparatus for radially adjusting a position of a plurality of tool cartridges of a machine tool having rotatable, concentric, elongate, inner and outer drive spindles with a plurality of pockets formed in the outer drive spindle exposing a portion of the inner drive spindle, the apparatus comprising:

• a wedge disposed in each pocket for movement relative to the longitudinal axis of the elongate inner drive spindle in response to relative rotation of the inner drive spindle with respect to the outer drive spindle when the inner drive spindle is in a predetermined selectable position with respect to each pocket;
• a rotatable member disposed in each pocket operably connected to the wedge and being selectively operably engageable with a portion of the inner drive spindle to cause rotation of the rotable member in response to rotation of the inner drive spindle with respect to the outer drive spindle when the inner drive spindle is in the predetermined selectable position with respect to each pocket, the rotatable member having a threaded external surface operably engaged with a threaded surface of the wedge to move the wedge longitudinally in response to rotation of the rotatable member;
• and
• a tool cartridge operably engaged within each pocket of the outer drive spindle for radial movement relative to the longitudinal axis of the outer drive spindle in response to relative movement of the corresponding wedge.

A method for radially adjusting a position of a plurality of tool cartridges of a machine tool having rotatable, concentric, elongate, inner and outer drive spindles with a plurality of pockets formed in the outer drive spindle exposing a portion of the inner drive spindle, the method comprising the steps of:

• moving a wedge disposed in each pocket relative to the longitudinal axis of the elongate inner drive spindle in response to relative rotation of the inner drive spindle with respect to the outer drive spindle when the inner drive spindle is in a predetermined selectable position with respect to each pocket;
• operably engaging a threaded external surface of a rotatable member disposed in each pocket with a threaded surface of the wedge to move the wedge longitudinally in response to rotation of the rotatable member with respect to the outer drive spindle;
• selectively operably engaging the rotatable member with a portion of the inner drive spindle when the inner drive spindle is in an operable longitudinal position corresponding to each pocket;
• and
• radially moving a tool cartridge operably engaged within each pocket of the outer drive spindle relative to the longitudinal axis of the spindle in response to relative movement of the corresponding wedge.

An apparatus for radially adjusting a position of a tool cartridge comprising:

• a machine tool having rotatable, concentric, elongate, inner and outer derive spindles with a plurality of pockets formed in the outer drive spindle exposing a portion of the inner drive spindle;
• a wedge disposed in each pocket for movement relative to the longitudinal axis of the elongate inner drive spindle in response to relative rotation of the inner drive spindle with respect to the outer drive spindle when the inner drive spindle is in a predetermined selectable position with respect to each pocket;
• a rotatable member disposed in each pocket operably connected to the wedge and being selectively operably engageable with a portion of the inner drive spindle to cause rotation of the rotable member in response to rotation of the inner drive spindle with respect to the outer drive spindle when the inner drive spindle is in the predetermined selectable position with respect to each pocket, the rotatable member having a threaded external surface operably engaged with a threaded surface of the wedge to move the wedge longitudinally in response to rotation of the rotatable member;
• a tool cartridge operably engaged within each pocket of the outer drive spindle for radial movement relative to the longitudinal axis of the spindle in response to relative movement of the corresponding wedge;
• and
• a ring spring for urging each tool cartridge to operably engage the corresponding wedge.