Patent US3634977A successfully refreshed from Google Patents.
US3634977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for dressing abrasive wheels
Assignee: Nachi Machining Technology Co
•
Filing: 1969-02-14
•
Granted: 1972-01-18
•
Expires: 1989-02-14
Abstract
Abstract An automatically operated trimming device fed radially of a rotating abrasive wheel in response to a predetermined dimension change of the wheel to reduce its outside diameter. The wheel is movably mounted in a head and the head is moved forwardly by the amount of reduction in the wheel diameter. The trimming operation is initiated by movement of the wheel relative to the head toward a workpiece.
Inventors
- 👤 Thomas A Bunting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:22
CPC Classifications
B; B23; B23F; B23F23/00; B23F23/12; B23F23/1225; B24; B24B; B24B49/00; B24B49/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
164 words
An abrasive finishing machine tool comprising a base, a workpiece support mounted on said base, a wheel head movably mounted on said base, and an abrasive finishing wheel carried for rotation by said wheel head, means for detecting when said wheel has worN in use by a predetermined amount, means for dressing the outside diameter of said wheel by a chosen reduction in radius in response to said detecting means, and means for advancing said wheel head toward a workpiece carried on said workpiece support to reposition said wheel to compensate for such dressing, said wheel being carried in a quill head which is movably mounted in said wheel head so as to be movable between a forward position in engagement with a workpiece and a retracted position clear of a workpiece, said detecting means comprising a limit switch arranged to detect forward movement of said quill head relative to said wheel head towards a workpiece to predetermined position relative to said wheel head.
Claim 2
Dependent Claim
164 words
An abrasive finishing machine tool comprising a base, a workpiece support mounted on said base, a wheel head movably mounted on said base, and an abrasive finishing wheel carried for rotation by said wheel head, means for detecting when said wheel has worN in use by a predetermined amount, means for dressing the outside diameter of said wheel by a chosen reduction in radius in response to said detecting means, and means for advancing said wheel head toward a workpiece carried on said workpiece support to reposition said wheel to compensate for such dressing, said wheel being carried in a quill head which is movably mounted in said wheel head so as to be movable between a forward position in engagement with a workpiece and a retracted position clear of a workpiece, said detecting means comprising a limit switch arranged to detect forward movement of said quill head relative to said wheel head towards a workpiece to predetermined position relative to said wheel head.
Claim 3
Dependent Claim
33 words
A machine tool as claimed in claim 1 wherein said compensating means is arranged to move said wheel towards a workpiece by the chosen reduction dressed off the outer diameter of said wheel.
Claim 4
Dependent Claim
64 words
A machine tool as claimed in claim 1, wherein said dressing means comprises a dressing tool mounted adjacent said wheel and arranged to be advanced into dressing engagement by a first distance and subsequently retracted from said wheel by a second distance on each such dressing, said first less said second distance being equal to the chosen reduction to be dressed off said wheel.
Claim 5
Dependent Claim
143 words
A machine tool as claimed in claim 3, wherein said dressing tool is carried in a holder, said holder is rotatably carried by means of a first screw threading of a first axial pitch in a bush, said bush is rotatably carried by means of a second screw threading of a second axial pitch in a housing which is mounted on said quill head, means is provided to rotate said bush by a fixed amount in either direction to advance and then retract said tool to dress and then clear said wheel and means is provided to allow said holder to rotate with said bush in the advance direction and to prevent said holder from rotating in said retract direction, said first axial pitch being greater than said second axial pitch by an amount directly proportional to said chosen reduction of said wheel.
Claim 6
Dependent Claim
47 words
A machine tool as claimed in claim 4, wherein said means for rotating said bush comprises a gear provided on said bush in engagement with a rack slidably mounted in said housing and operable over a predetermined stroke by a double-acting fluid pressure piston and cylinder device.
Claim 7
Dependent Claim
47 words
A machine tool as claimed in claim 4, wherein said means for allowing said holder to rotate with said bush in the advance direction and to prevent said holder from rotating in said retract direction comprises a one-way clutch operatively arranged between said holder and said housing.
Claim 8
Dependent Claim
102 words
A machine tool as claimed in claim 2, wherein said wheel head is movable on said base by means of a lead screw and said lead screw is arranged to be rotated by said compensating means which comprises a compensator housing, a gear rotatably mounted in said compensator housing arranged to drive said lead screw by way of a clutch, a rack slidably mounted in said compensator housing and movable by a double-acting fluid pressure piston and cylinder device, said clutch being engaged when said rack is moved to advance said wheel head and disengaged during the return stroke of said rack.
Claim 9
Dependent Claim
30 words
A machine tool as claimed in claim 2 wherein said limit switch is a proximity switch arranged to sense the approach of a probe arranged to move with said wheel.
Claim 10
Dependent Claim
53 words
A machine tool as claimed in claim 2 wherein said limit switch is arranged to energize a timer relay, said timer relay being adapted to close electrical contacts thereon to initiate the electrical control of such wheel dressing after a time interval corresponding to at least one revolution of said wheel in use.
Claim 11
Dependent Claim
76 words
A machine tool as defined in claim 1 in which said wheel is carried by said hone head for relative movement with respect thereto, resilient means acting between said hone head and wheel effective to urge said wheel toward a workpiece with a substantially constant force in whicH the means for detecting when the wheel has worn in use by a predetermined amount comprises means for sensing movement of said wheel relative to said hone head.
Claim 12
Dependent Claim
129 words
A gear honing machine comprising a base, a rotary work support on said base, a hone slide movable on said base toward and away from said work support, a rotary hone support mounted on said hone slide for movement relative thereto toward and away from said work support, resilient means acting between said hone support and hone slide urging said hone support forwardly to a position determined by engagement between a work gear on said work support and a hone on said hone support, sensing means responsive to predetermined forward movement of said hone support on said hone slide to trim the hone to reduce its outside diameter by a predetermined amount, and means for thereafter advancing said hone slide by an equivalent amount to reset the sensing means.
Claim 13
Dependent Claim
129 words
A gear honing machine comprising a base, a rotary work support on said base, a hone slide movable on said base toward and away from said work support, a rotary hone support mounted on said hone slide for movement relative thereto toward and away from said work support, resilient means acting between said hone support and hone slide urging said hone support forwardly to a position determined by engagement between a work gear on said work support and a hone on said hone support, sensing means responsive to predetermined forward movement of said hone support on said hone slide to trim the hone to reduce its outside diameter by a predetermined amount, and means for thereafter advancing said hone slide by an equivalent amount to reset the sensing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |