US3908315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine systems
Assignee: Sundstrand Syracuse Inc
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Filing: 1973-10-19
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Granted: 1975-09-30
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Expires: 1993-10-19
Abstract
Abstract A grinding machine system which provides infinitely variable speed control of the rotatable wheels in a centerless grinding machine, with the control of such wheels at plural grinding stations to maintain the same surface speed at both stations to prevent application of torque to a workpiece being ground at both stations. The wear of a wheel is detected by a sensor system using pressure coolant fluid and having both a wheel sensing orifice and a control orifice whereby an imbalance in pressures in a pair of cavities associated one with each of such orifices provides an indication of wheel wear. Means responsive to the pressure imbalance returns the sensor orifice to a null position and also advances the wheel to a new position. Incorporated into the wheel-sensing structure for a grinding wheel is a dressing tool which is automatically positioned in dressing position upon movement of the sensing structure to its null position whereby the location of the dressing tool is known at all times. The wheel-sensing mechanism includes a sensor ram housing which is carried on a dresser base and is cam controlled in movement axially of the grinding wheel to have the sensor follow a predetermined contour of the grinding wheel. Additionally, transducers associated with parts of the grinding machine system provide instantaneous readouts of the position of the sensor ram both radially and axially of the grinding wheel.
Inventors
- 👤 Robert L Schaller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
B; B24; B24B; B24B47/00; B24B47/10; B24B47/18; B24B49/00; B24B49/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
125 words
A plural station grinding machine with each station having a grinding wheel, said grinding wheels being positioned for simultaneous operation on a workpiece, first and second means associated one with each grinding wheel for driving the associated grinding wheel at a variable rate of speed, means for determining the actual surface speed of each of said grinding wheels, means for setting the same predetermined surface speed for both of said grinding wheels, and means responsive to both said setting means and said determining means for controlling the first and second driving means independently of each other to have both of said grinding wheels operate with the same surface speed to avoid generating torquE in a workpiece which is engaged by both of said grinding wheels.
Claim 2
Dependent Claim
125 words
A plural station grinding machine with each station having a grinding wheel, said grinding wheels being positioned for simultaneous operation on a workpiece, first and second means associated one with each grinding wheel for driving the associated grinding wheel at a variable rate of speed, means for determining the actual surface speed of each of said grinding wheels, means for setting the same predetermined surface speed for both of said grinding wheels, and means responsive to both said setting means and said determining means for controlling the first and second driving means independently of each other to have both of said grinding wheels operate with the same surface speed to avoid generating torquE in a workpiece which is engaged by both of said grinding wheels.
Claim 3
Dependent Claim
48 words
A plural station grinding machine as defined in claim 1 wherein said means for determining surface speed of a grinding wheel includes: means for detecting the speed of rotation of a grinding wheel; means for detecting wheel radius; and means for multiplying the radius and speed of rotation.
Claim 4
Dependent Claim
55 words
A plural station grinding machine as defined in claim 1 wherein said grinding wheel driving means includes a hydrostatic transmission having a motor connected to the grinding wheel and a pump communicating with the motor, and means for varying the operation of the pump to vary the speed of the motor and associated grinding wheel.
Claim 5
Dependent Claim
123 words
A plural station grinding machine with each station having a centerless grinder including a grinding wheel and a regulating wheel, means associated with at least one of said wheels at each of the stations for driving said one wheel at a variable set rate of speed, means for establishing a common surface speed for said one wheel at each station, means for determining actual surface speed of said one wheel at each of the stations, and means for comparing the actual surface speeds with the established surface speed and for controlling the driving means to have said one wheel at both of said stations operate at the same surface speed to avoid generating torque in a workpiece positioned in both of said stations.
Claim 6
Dependent Claim
123 words
A plural station grinding machine with each station having a centerless grinder including a grinding wheel and a regulating wheel, means associated with at least one of said wheels at each of the stations for driving said one wheel at a variable set rate of speed, means for establishing a common surface speed for said one wheel at each station, means for determining actual surface speed of said one wheel at each of the stations, and means for comparing the actual surface speeds with the established surface speed and for controlling the driving means to have said one wheel at both of said stations operate at the same surface speed to avoid generating torque in a workpiece positioned in both of said stations.
Claim 7
Dependent Claim
150 words
A plural station grinding machine with each station having a centerless grinder including a grinding wheel and a regulating wheel, said grinding wheels being positioned for simultaneous operation on a workpiece, a pair of hydrostatic transmissions each having a motor connected to a grinding wheel and a pump communicating with the motor, means for varying the operation of the pumps to vary the speed of the motors and associated grinding wheels, control means for setting the same rate of surface speed for said grinding wheels, and means for determining actual surface speed of each of said grinding wheels including means for detecting speed of rotation and radius of each grinding wheel, said control means including means responsive to said surface speed determining means for varying the operation of a pump as required to maintain the surface speeds of said grinding wheels at the desired rate as the grinding wheels wear.
Claim 8
Dependent Claim
150 words
A plural station grinding machine with each station having a centerless grinder including a grinding wheel and a regulating wheel, said grinding wheels being positioned for simultaneous operation on a workpiece, a pair of hydrostatic transmissions each having a motor connected to a grinding wheel and a pump communicating with the motor, means for varying the operation of the pumps to vary the speed of the motors and associated grinding wheels, control means for setting the same rate of surface speed for said grinding wheels, and means for determining actual surface speed of each of said grinding wheels including means for detecting speed of rotation and radius of each grinding wheel, said control means including means responsive to said surface speed determining means for varying the operation of a pump as required to maintain the surface speeds of said grinding wheels at the desired rate as the grinding wheels wear.
Claim 9
Dependent Claim
128 words
A grinding machine having a centerless grinder including a grindinng wheel and a regulating wheel, a hydrostatic transmission having a motor connected to the grinding wheel and a pump communicating with the motor, means for varying the operation of the pump to vary the speed of the motor and associated grinding wheel, control means for setting the rate of surface speed for said grinding wheel, and means for determining actual surface speed of said grinding wheel including means for detecting speed of rotation and radius of the grinding wheel, said control means including means responsive to said surface speed determining means for varying the operation of the pump as required to maintain the surface speed of said grinding wheel at the desired rate as the grinding wheel wears.
Claim 10
Dependent Claim
128 words
A grinding machine having a centerless grinder including a grindinng wheel and a regulating wheel, a hydrostatic transmission having a motor connected to the grinding wheel and a pump communicating with the motor, means for varying the operation of the pump to vary the speed of the motor and associated grinding wheel, control means for setting the rate of surface speed for said grinding wheel, and means for determining actual surface speed of said grinding wheel including means for detecting speed of rotation and radius of the grinding wheel, said control means including means responsive to said surface speed determining means for varying the operation of the pump as required to maintain the surface speed of said grinding wheel at the desired rate as the grinding wheel wears.
Claim 11
Dependent Claim
115 words
A grinding machine having a centerless grinder including a grinding wheel and a regulating wheel, a hydrostatic transmission having a motor connected to the grinding wheel and a pump communicating with the motor, means for varying the operation of the pump to vary the speed of the motor and associated grinding wheel, control means for setting the rate of surface speed for said grinding wheel, and means for determining actual sruface speed of said grinding wheel, said control means including means responsive to said surface speed determining means for varying the operation of the pump as required to maintain the surface speed of said grinding wheel at the desired rate as the grinding wheel wears.
Claim 12
Dependent Claim
115 words
A grinding machine having a centerless grinder including a grinding wheel and a regulating wheel, a hydrostatic transmission having a motor connected to the grinding wheel and a pump communicating with the motor, means for varying the operation of the pump to vary the speed of the motor and associated grinding wheel, control means for setting the rate of surface speed for said grinding wheel, and means for determining actual sruface speed of said grinding wheel, said control means including means responsive to said surface speed determining means for varying the operation of the pump as required to maintain the surface speed of said grinding wheel at the desired rate as the grinding wheel wears.
Claim 13
Dependent Claim
142 words
A plural station grinding machine with each station having a grinding wheel, said grinding wheels being positioned for simultaneous operation on a wOrkpiece, a pair of hydrostatic transmissions each having a motor connected to a grinding wheel and a pump communicating with the motor, means for varying the operation of the pumps to vary the speed of the motors and associated grinding wheels, control means for setting the same rate of surface speed for said grinding wheels, and means for determining actual surface speed of each of said grinding wheels including means for detecting speed of rotation and radius of each grinding wheel, said control means including means responsive to said surface speed determining means for varying the operation of a pump as required to maintain the surface speeds of said grinding wheels at the desired rate as the grinding wheels wear.
Claim 14
Dependent Claim
142 words
A plural station grinding machine with each station having a grinding wheel, said grinding wheels being positioned for simultaneous operation on a wOrkpiece, a pair of hydrostatic transmissions each having a motor connected to a grinding wheel and a pump communicating with the motor, means for varying the operation of the pumps to vary the speed of the motors and associated grinding wheels, control means for setting the same rate of surface speed for said grinding wheels, and means for determining actual surface speed of each of said grinding wheels including means for detecting speed of rotation and radius of each grinding wheel, said control means including means responsive to said surface speed determining means for varying the operation of a pump as required to maintain the surface speeds of said grinding wheels at the desired rate as the grinding wheels wear.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |