Adjustable boring quill assembly

Claim 2

Means for radially adjusting a rotatably mounted cutting tool comprising: a fluid cylinder having a piston being linearly movable and means connecting said piston and said cutting tool to produce radially inward adjustment of the cutting tool upon movement of said piston in one direction and radially outward adjustment of said cutting tool upon movement of said piston in opposite direction; and an automatically adjustable stop member mounted within said fluid cylinder and operable to abut said piston to adjustably limit movement of said piston in one direction whereby to adjustably limit the radial adjustment of said cutting tool.

Claim 3

The invention as defined in claim 1 wherein said rotatably mounted cutting tool is operable to perform a cutting operation on a workpiece and including means sensing the effect of said cutting tool on said workpiece and moving said stop member to a position dependent upon the deviation of this effect from a predetermined standard.

Claim 4

The invention as defined in claim 1 and in which said cutting tool is operable to perform a cutting operation on a workpiece and including sensing means operable to sense the deviation in the cutting operation performed on said workpiece from a predetermined standard, a motor connected with said stop member and being linearly movable so as to move said stop member linearly when said motor is actuated and means connecting said sensing means and said motor to actuate said motor upon said sensing means sensing a deviation in said workpiece.

Claim 5

In combination with a boring machine having a spindle, a boring quill secured to said spindle for rotation therewith, a boring bar having a cutting tool adapted for working upon a work surface, said boring bar being adjustably secured within said boring quill along an axis eccentric in relation relative to the central axis of said boring quill and said spindle, means effecting automatic radial adjustment of said boring bar in relation to said work surface around said central axis, said means comprising: a gaging apparatus, a fluid cylinder operably connected to said boring quill, sAid fluid cylinder having a fluid chamber containing a piston reciprocable therein, a first conduit adapted to selectively connect said fluid chamber behind said piston with a source of fluid pressure, a second conduit adapted to selectively connect said fluid chamber forwardly of said piston with said source of fluid pressure, means interposed between said source of fluid pressure and said first and second conduit responsive to signals received from said gaging apparatus to selectively connect said source of fluid pressure with first or said second conduit; and an adjustable stop member disposed within said fluid cylinder chamber and operable to abut said piston to limit movement of said piston in one direction, and means responsive to signals from said gaging apparatus to move said stop member within said fluid cylinder.

Claim 6

In combination with a boring machine having a spindle, a boring quill secured to said spindle for rotation therewith, a boring bar having a cutting tool adapted for working upon a work surface, said boring bar being adjustably secured within said boring quill along an axis eccentric in relation relative to the central axis of said boring quill and said spindle, means effecting automatic radial adjustment of said boring bar in relation to said work surface around said central axis, said means comprising: a gaging apparatus, a fluid cylinder operably connected to said boring quill, sAid fluid cylinder having a fluid chamber containing a piston reciprocable therein, a first conduit adapted to selectively connect said fluid chamber behind said piston with a source of fluid pressure, a second conduit adapted to selectively connect said fluid chamber forwardly of said piston with said source of fluid pressure, means interposed between said source of fluid pressure and said first and second conduit responsive to signals received from said gaging apparatus to selectively connect said source of fluid pressure with first or said second conduit; and an adjustable stop member disposed within said fluid cylinder chamber and operable to abut said piston to limit movement of said piston in one direction, and means responsive to signals from said gaging apparatus to move said stop member within said fluid cylinder.

Claim 7

In the combination as defined in claim 4, said piston being operable upon actuation of said fluid cylinder to effect adjustment of said boring bar relative to said work surface to retract said cutting tool from said work surface when moved in a first direction by connection of said source of fluid pressure with said first conduit and to feed said cutting tool towards said work surface when moved in an opposite direction by connection of said source of fluid pressure with said second conduit, said stop member being effective to limit movement of said piston in said second direction.

Claim 8

In the combination as defined in claim 5, said signal responsive means comprising an electric motor connected with said stop member and actuated by said signals received from said gaging apparatus.

Claim 9

In the combination as defined in claim 6, said stop member being connected to a screw shaft adapted for rotation by said motor, said screw shaft being supported in a stationary nut member so that upon rotation of said screw shaft by said motor said screw shaft will be linearly advanced through said nut member to thereby reciprocate said stop member.

Claim 10

In the combination as defined in claim 4, said means interposed between said source of fluid pressure and said first and second conduit comprising a normally closed valve, a solenoid for operation of said valve, said solenoid being connected to said gaging apparatus and responsive to signals received therefrom

Claim 11

The invention as defined in claim 4 and in which said boring quill comprises a housing, a first bushing retained within said housing, a second bushing retained around said boring bar, a rotatable eccentric sleeve member disposed within said bushings and operable upon rotation to move said boring bar to a new radial position.

Claim 12

The invention as defined in claim 5 wherein said stop member is disposed within said fluid chamber behind said piston; and said stop member is effective to limit movement of said piston by abutment of said piston with said stop member.