Patent US3736704A successfully refreshed from Google Patents.
US3736704A
Expired / Lapsed
US
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Grinding machine
Assignee: Cincinnati Milacron Heald Corp
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Filing: 1971-05-17
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Granted: 1973-06-05
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Expires: 1991-05-17
Abstract
Abstract A grinding machine operative under controlled-force and controlled-rate conditions, wherein the rate of feed is controlled in accordance with the size of the abrasive wheel.
Inventors
- 👤 E Robillard
- 👤 C Valley
- 👤 R Lizotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:49
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/12; B23Q15/08; B23Q15/10; B24; B24B; B24B49/00; B24B49/16; B24B49/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A grinding machine for generating a surface of revolution on a workpiece, comprising a. a base, b. a workhead table mounted on the base and having a support for carrying the workpiece, c. a wheelhead table mounted on the base and having a rotatable spindle carrying an abrasive wheel, d. feed means for bringing about relative motion between the workhead table and the wheelhead table transversely of the axis of the surface of revolution, the feed means including an actuator for producing a rough grind with controlled-force conditions and a motor for producing a finish grind with controlled-rate conditions, and e. control means for adjusting the rate of feed during the said finish grind in accordance with the size of the abrasive wheel.
Claim 2
Dependent Claim
123 words
A grinding machine for generating a surface of revolution on a workpiece, comprising a. a base, b. a workhead table mounted on the base and having a support for carrying the workpiece, c. a wheelhead table mounted on the base and having a rotatable spindle carrying an abrasive wheel, d. feed means for bringing about relative motion between the workhead table and the wheelhead table transversely of the axis of the surface of revolution, the feed means including an actuator for producing a rough grind with controlled-force conditions and a motor for producing a finish grind with controlled-rate conditions, and e. control means for adjusting the rate of feed during the said finish grind in accordance with the size of the abrasive wheel.
Claim 3
Dependent Claim
17 words
A grinding machine as recited in claim 1, wherein the said motor is an electrical stepping motor.
Claim 4
Dependent Claim
78 words
A grinding machine as recited in claim 1, wherein the feed means is operative in the wheelhead table to bring about the said relative movement, wherein a compensation slide lies between the wheelhead table and the base, wherein the said motor is operative to move the compensation slide by an incremental amount every time a dressing operation takes place, and wherein a potentiometer is connected to the compensation slide to partake of the same incremental amount of movement.
Claim 5
Dependent Claim
38 words
A grinding machine as recited in claim 3, wherein the motor is connected to the compensating slide by a ball screw, and wherein the rotation of the screw produces a corresponding movement of a contactor in the potentiometer.
Claim 6
Dependent Claim
49 words
A grinding machine as recited in claim 4, wherein the potentiometer produces an electrical signal indicative of the compensation slide position and of wheel size, and wherein this electrical signal is fed into a pulser to control the rate of pulses fed to the motor during the finish grind.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |