Bottle boring tool

Claim 2

A boring head particularly adapted for use in a boring assembly to enlarge the diameter of an existing bore within a turbine shaft or the like along a desired linear portion of the shaft, including shell means having a central axis and formed to allow its insertion within the existing bore of the shaft, said shell means being rotatable about said central axis within said bore, at least one cutting tool means mounted within said shell means and rotatable therewith about said central axis, said tool means being mounted within said shell means for pivoting movement relative thereto, said tool means having a cutting portion extensible linearly beyond a forward end of said shell means and being movable radially with respect to the central axis of said shell means, cam assembly means mounted within said shell means, said cam assembly means including a cam means disposed transversely to the central axis of said shell means and along a diametrical axis thereof, said cam means being mounted between opposite, axially extending slots formed in said shell means for axial travel therealong, said cam means engaging a cam follower portion of said tool means to radially move said cutting portion of said tool means by pivoting said tool means in response to the axial movement of said cam means along said central axis of said shell means, said cam assembly means also including a yoke member to transmit such axial movement to said cam means, said yoke member having a forked portion mounted on said cam means and a body portion integrally formed with said forked portion and disposed at an end of said yoke means opposite said cam means, said body portion adapted to threadedly engage transmission means mounted in stationary axial position with respect to said boring head, said transmission means being rotatable about a central axis thereof to move said yoke means and thereby said cam Means to a precise, selected position relative to said shell means thereby providing selected radial positioning of said cutting portion of said cutting tool means to allow, upon rotation of said shell means and said cutting tool means and cam assembly means therewith, said boring head to cut an enlarged bore of preselected diameter in the turbine shaft to selectively eliminate undesirable inclusions and stress points within such shaft.

Claim 3

The boring head of claim 1 wherein said shell means is a generally cylindrical hollow sleeve having one end thereof mounted on a rotatable drive shaft for rotation therewith inside the turbine shaft to be bored.

Claim 4

The boring head of claim 1 wherein said cutting tool means includes at least two tool holding members, each of said tool holding members having said cutting portion disposed at an inward end of a lever arm portion, said cutting portion being formed by an outwardly extending cutting blade mounted on said inward end of said lever arm portion, each of said tool holding members having a cam follower portion formed on the opposite end of said lever arm portion, said cam follower portion having a generally outwardly extending slot formed therein, each of said tool holding members being pivotally mounted in opposed matable relationship on a pivot pin disposed transversely to said central axis of said shell means along a diametrical axis of said shell means, said outwardly extending cam follower slot on each of said tool holding members engaging said cam means of said axially adjustable cam assembly such that as said cam assembly is moved axially along the central axis of said shell means, movement of said cam means of said cam assembly in each of said cam follower slots will cause each of said tool holding members to pivot in opposite directions about said pivot pin such that said cutting blades will be radially advanced or retracted.

Claim 5

A boring assembly particularly adapted for use in bottle boring turbine shafts and the like to enlarge the diameter of an existing axial bore within such shafts along a desired linear portion of the shaft to reduce stress points formed in the vicinity of the center line of the shaft during its manufacture, including boring head means having a central axis and formed to allow its insertion into the existing bore of the shaft, said boring head means being rotatable about said central axis, within the bore, cutting tool means mounted within said boring head means and rotatable therewith about said axis, said tool means being mounted within said boring head means for pivoting movement relative thereto, said tool means having a cutting portion extensible linearly beyond a forward end of said boring head means and being movable radially with respect to the central axis of said boring head means, cam assembly means mounted within said boring head means, a portion of said cam assembly means movable axially along said boring head means, boring drive assembly means having an outer, generally cylindrical boring drive means rotatable about a central axis thereof, said outer drive means having said boring head means mounted at a forward end thereof for rotation therewith about said central axis thereof concentric with said central axis of said boring head means, said drive means having an interior axial passageway formed along the length thereof, said boring drive assembly having tool adjustment means having a diameter less than the diameter of said passageway, said adjustment means being disposed in said passageway along the length thereof, a forward portion of said adjustment means operatively engaging said cam assembly means, said portion of said cam assembly means engaging said tool means, said cam assembly being movable along the central axis of said boring head means by movement of said adjustment means independently of said drive means to cause said tool means to be pivoted about said lateral axis to move said cutting portion of said tool means radially with respect to said central axis of sAid boring head means, to permit precise, selected positioning of said cutting portion of said tool means to allow, upon rotation of said boring drive means and said boring head means mounted thereon, and linear movement of said drive means and boring head means with respect to said turbine shaft, said boring assembly to cut an enlarged bore of selected diameter within the turbine shaft, said cutting tool means including at least two tool holding members, each of said tool holding members having said cutting portion disposed at a forward end of a lever arm portion, said cutting portion being formed by an outwardly extending cutting blade mounted on said end of said lever arm portion, and having a cam follower portion formed on the opposite end of said lever arm portion, said cam follower portion having a generally outwardly extending slot formed therein, each of said tool holding members being pivotally mounted in opposed, matable relationship on a pivot pin disposed transversely to said central axis of said boring head means along a diametrical axis of said boring head means for pivotal movement within said boring head means, said cam follower slot on each of said tool holding members engaging a portion of said axially adjustable cam assembly such that as said cam assembly is moved axially along the central axis of said boring head means, said portion of said cam follower assembly will be moved in said cam follower slot thereby causing each of said tool holding members to pivot in opposite directions about said pivot pin such that said cutting blades will be radially advanced outwardly or retracted inwardly.

Claim 6

A boring assembly particularly adapted for use in bottle boring turbine shafts and the like to enlarge the diameter of an existing axial bore within such shafts along a desired linear portion of the shaft to reduce stress points formed in the vicinity of the center line of the shaft during its manufacture, including boring head means having a central axis and formed to allow its insertion into the existing bore of the shaft, said boring head means being rotatable about said central axis, within the bore, cutting tool means mounted within said boring head means and rotatable therewith about said axis, said tool means being mounted within said boring head means for pivoting movement relative thereto, said tool means having a cutting portion extensible linearly beyond a forward end of said boring head means and being movable radially with respect to the central axis of said boring head means, cam assembly means mounted within said boring head means, a portion of said cam assembly means movable axially along said boring head means, boring drive assembly means having an outer, generally cylindrical boring drive means rotatable about a central axis thereof, said outer drive means having said boring head means mounted at a forward end thereof for rotation therewith about said central axis thereof concentric with said central axis of said boring head means, said drive means having an interior axial passageway formed along the length thereof, said boring drive assembly having tool adjustment means having a diameter less than the diameter of said passageway, said adjustment means being disposed in said passageway along the length thereof, a forward portion of said adjustment means operatively engaging said cam assembly means, said portion of said cam assembly means engaging said tool means, said cam assembly being movable along the central axis of said boring head means by movement of said adjustment means independently of said drive means to cause said tool means to be pivoted about said lateral axis to move said cutting portion of said tool means radially with respect to said central axis of sAid boring head means, to permit precise, selected positioning of said cutting portion of said tool means to allow, upon rotation of said boring drive means and said boring head means mounted thereon, and linear movement of said drive means and boring head means with respect to said turbine shaft, said boring assembly to cut an enlarged bore of selected diameter within the turbine shaft, said cutting tool means including at least two tool holding members, each of said tool holding members having said cutting portion disposed at a forward end of a lever arm portion, said cutting portion being formed by an outwardly extending cutting blade mounted on said end of said lever arm portion, and having a cam follower portion formed on the opposite end of said lever arm portion, said cam follower portion having a generally outwardly extending slot formed therein, each of said tool holding members being pivotally mounted in opposed, matable relationship on a pivot pin disposed transversely to said central axis of said boring head means along a diametrical axis of said boring head means for pivotal movement within said boring head means, said cam follower slot on each of said tool holding members engaging a portion of said axially adjustable cam assembly such that as said cam assembly is moved axially along the central axis of said boring head means, said portion of said cam follower assembly will be moved in said cam follower slot thereby causing each of said tool holding members to pivot in opposite directions about said pivot pin such that said cutting blades will be radially advanced outwardly or retracted inwardly.

Claim 7

The bottle boring assembly set forth in claim 4 including drive shaft drive motor means for rotating said boring drive means and boring head means mounted thereon about their concentric central axes at a sufficient speed to accomplish cutting of the interior surface of the bore of said turbine shaft when said cutting blades of said boring head means are brought into contact therewith, said drive motor means operatively engaging the drive means at a point therealong to effect rotation thereof upon actuation of said motor means, and linear drive motor means disposed in operative engagement with said boring drive means to move said drive means and said boring head means into the existing bore in the turbine shaft at a constant speed such that said boring head means will make a continuous cut within said turbine shaft as the boring drive means is rotated by said drive shaft drive motor means.

Claim 8

The boring assembly of claim 4 wherein said boring head means is a generally cylindrical hollow sleeve which may be mounted on said rotatable boring drive means for rotation threwith inside the existing bore of the turbine shaft to be bored.

Claim 9

The boring assembly set forth in claim 4 wherein said cam assembly means include a cam means disposed transversely to the central axis of said boring head means and along a diametrical axis thereof, said cam means being mounted between opposite and axially extending slots formed in said boring head means for travel therealong, said cam means engaging said cam follower portion of said tool means to move said tool means in response to the linear movement of said cam means along said central axis of said boring head means, said cam assembly means also including a yoke member mounted on said cam means to transmit linear movement to said cam means, said yoke member having a forked portion mounted on said cam means and a body portion integrally formed with said forked portion and disposed at an end of said yoke means opposite said cam means, said body portion adapted to threadedly engage transmission means mounted in a stationary axial position with respect to said boring head means, said transmission means being rotatable about a central axis thereof to move said yoke means and said cam means relative thereto and linearly with respect to said boring head means.

Claim 10

A portable bottle boring apparatus to selectively enlarge an intermedIate portion of an axial bore in a stationary object while maintaining end portions of the bore at the original size comprising: a cutting tool to be inserted into the intermediate portion of the bore through one of the end portions of the bore and adapted to selectively enlarge the intermediate portion of the bore up to more than twice the original size of the bore; a boring head upon which said cutting tool is movably mounted for movement along the radial direction of the bore; selecting means external of the bore to determine desired radial positions of said cutting tool; control means responsive to said selecting means to transform a selection of a desired radial position of said cutting tool made externally of the bore into an activation of said cutting tool to accurately and precisely set said cutting tool at the desired position; first drive means to adjustably locate said boring head along the axis of the bore; second drive means to rotate said boring head, and hence said cutting tool, in the bore; bearing means to accurately position said boring head with respect to the axis of the bore, regardless of the length of the intermediate portion of the bore, while permitting rotation of said boring head; and mounting means to accurately position the bottle boring apparatus with respect to the axis of the bore, regardless of where the stationary object is located.

Claim 11

A portable bottle boring apparatus to selectively enlarge an intermedIate portion of an axial bore in a stationary object while maintaining end portions of the bore at the original size comprising: a cutting tool to be inserted into the intermediate portion of the bore through one of the end portions of the bore and adapted to selectively enlarge the intermediate portion of the bore up to more than twice the original size of the bore; a boring head upon which said cutting tool is movably mounted for movement along the radial direction of the bore; selecting means external of the bore to determine desired radial positions of said cutting tool; control means responsive to said selecting means to transform a selection of a desired radial position of said cutting tool made externally of the bore into an activation of said cutting tool to accurately and precisely set said cutting tool at the desired position; first drive means to adjustably locate said boring head along the axis of the bore; second drive means to rotate said boring head, and hence said cutting tool, in the bore; bearing means to accurately position said boring head with respect to the axis of the bore, regardless of the length of the intermediate portion of the bore, while permitting rotation of said boring head; and mounting means to accurately position the bottle boring apparatus with respect to the axis of the bore, regardless of where the stationary object is located.

Claim 12

A portable bottle boring apparatus as claimed in claim 8 and further comprising a second cutting tool, said cutting tools being pivotably mounted at a common pivot point on the axis of the bore and being simultaneously movable in opposite radial directions upon activation by said control means.

Claim 13

A portable bottle boring apparatus as claimed in claim 8 wherein said cutting tool comprises: a pivotably mounted tool arm; a cam follower portion at one end of said tool arm having a cam follower slot formed therein; and a cutting blade portion at the other end of said tool arm.

Claim 14

A portable bottle boring apparatus as claimed in claim 10 wherein said cutting blade portion comprises a standard tool bit which may be easily removed and replaced.

Claim 15

A portable bottle boring apparatus as claimed in claim 10 wherein said boring head comprises a generally cylindrical shell concentric with the bore and having a pivot pin diametrically located therein to mount said tool arm.

Claim 16

A portable bottle boring apparatus as claimed in claim 10 wherein said control means comprises: a cam assembly mounted for axial movement to engage said cam follower portion of said cutting tool and set said cutting tool at the desired position along the radius of the bore; and adjustment means actuated by said selecting means to drive said cam assembly in the axial direction.

Claim 17

A portable bottle boring apparatus as claimed in claim 13 wherein said cam assembly comprises: a yoke having a threaded portion formed at the base end thereof and mounted for axial movement along the bore; and a cam pin mounted between the axis of said yoke and adapted to engage said cam follower slot to set the radial position of said cutting tool upon axial movement of said yoke.

Claim 18

A portable bottle boring apparatus as claimed in claim 14 wherein said adjustment means comprises: a threaded bar mounted for free rotation and adapted to engage said threaded portion of said yoke; and a torque tube to drive said threaded bar to actuate said yoke.

Claim 19

A portable bottle boring apparatus as claimed in claim 15 wherein said torque tube is hollow to permit a fluid to be introduced to the vicinity of said cutting tool for cooling and cleaning.

Claim 20

A portable bottle boring apparatus as claimed in claim 15 wherein said selecting means comprises a calibration disk attached to said torque tube.

Claim 21

A portable bottle boring apparatus as claimed in claim 8 wherein said mounting means comprises a feed table.

Claim 22

A portable bottle boring apparatus as claimed in claim 8 wherein said bearing means comprises at least one friction reducing bearing member lOcated adjacent said boring head and adapted to engage the bore at its original size.

Claim 23

A portable bottle boring apparatus to selectively enlarge an intermediate portion of an axial bore in a stationary turbine shaft while maintaining end portions of the bore at the original size comprising: a generally cylindrical shell concentric with the bore; a pivot pin diametrically located in said shell; a pair of cutting tools pivotably mounted on said pivot pin, each of said cutting tools having a cutting blade portion at one end of a tool arm and a cam follower portion with a curvilinear cam follower slot at the other end thereof; a yoke having a base portion and a pair of extending arms mounted for axial movement in said shell; a cam pin mounted between said arms of said yoke and adapted to engage said cam follower slots to simultaneously set said cutting tools in opposing radial directions upon axial movement of said yoke; threads formed on said base portion of said yoke; a threaded transmission bar axially mounted in said shell for free rotation with respect thereto and adapted to engage said threads on said yoke; a torque tube to drive said transmission bar to actuate said yoke for axial movement to produce radial movement for said cutting tools; a boring drive shaft threadedly connected to said shell; bearing means to accurately position said drive shaft and said shell with respect to the axis of the bore, regardless of the length of the intermediate portion of the bore, while reducing rotational friction; a calibration disk affixed to said torque tube and releasably affixed to said boring drive shaft, positioning of said calibration disk accurately determining the radial setting of said cutting tools by activation of said torque tube, said transmission bar and said yoke with respect to said boring drive shaft and said shell; first drive means to adjustably locate said boring drive shaft and said shell along the axis of the bore; second drive means to rotate said boring drive shaft, said shell and said cutting tools; and mounting means to accurately position the bottle boring apparatus with respect to the axis of the bore, regardless of where the turbine shaft is located.

Claim 24

A portable bottle boring apparatus to selectively enlarge an intermediate portion of an axial bore in a stationary turbine shaft while maintaining end portions of the bore at the original size comprising: a generally cylindrical shell concentric with the bore; a pivot pin diametrically located in said shell; a pair of cutting tools pivotably mounted on said pivot pin, each of said cutting tools having a cutting blade portion at one end of a tool arm and a cam follower portion with a curvilinear cam follower slot at the other end thereof; a yoke having a base portion and a pair of extending arms mounted for axial movement in said shell; a cam pin mounted between said arms of said yoke and adapted to engage said cam follower slots to simultaneously set said cutting tools in opposing radial directions upon axial movement of said yoke; threads formed on said base portion of said yoke; a threaded transmission bar axially mounted in said shell for free rotation with respect thereto and adapted to engage said threads on said yoke; a torque tube to drive said transmission bar to actuate said yoke for axial movement to produce radial movement for said cutting tools; a boring drive shaft threadedly connected to said shell; bearing means to accurately position said drive shaft and said shell with respect to the axis of the bore, regardless of the length of the intermediate portion of the bore, while reducing rotational friction; a calibration disk affixed to said torque tube and releasably affixed to said boring drive shaft, positioning of said calibration disk accurately determining the radial setting of said cutting tools by activation of said torque tube, said transmission bar and said yoke with respect to said boring drive shaft and said shell; first drive means to adjustably locate said boring drive shaft and said shell along the axis of the bore; second drive means to rotate said boring drive shaft, said shell and said cutting tools; and mounting means to accurately position the bottle boring apparatus with respect to the axis of the bore, regardless of where the turbine shaft is located.