US3590534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel wear compensation
Assignee: Northrop Grumman Systems Corp
•
Filing: 1968-11-27
•
Granted: 1971-07-06
•
Expires: 1988-11-27
Abstract
Abstract A single compensating feed increment device advances the wheel to compensate first for wear and then for truing. A counter is set for a predetermined number of wheel feed increments, some of which are used to compensate for wheel wear, others to compensate for dressing. During grinding, a post process gauge actuates the increment feed to advance the wheel support each time work size reaches a predetermined oversize amount short of the oversize limit. Each increment of advance is equal to the amount of oversize correction for which the gauge is set. Each such advance is counted by the counter. A truing operation is performed after a predetermined number of pieces has been ground. In response to the truing signal, the increment feed is actuated to advance the wheel support by the remaining increments of the predetermined number for which the counter was set. The truing tool advances a predetermined number of increments equal to the total increment advance of the wheel, and reduces wheel radius by the amount equal to the wheel advance by said remaining increments.
Inventors
- 👤 Glenn M Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:45
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/18; B24B49/02; B24B49/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
220 words
A grinding machine comprising a. a grinding wheel and grinding wheel support, b. a work support, c. means for moving said grinding wheel support toward and from said work support including d. a feed mechanism, e. a dressing device including f. a truing tool, g. means for effecting relative transverse and longitudinal movements between said truing tool and said grinding wheel to perform a dressing operation, h. a guage for measuring workpieces, i. wheel adjusting means for actuating said feed mechanism for adjusting said grinding wheel relative to said workpiece, j. said wheel adjusting means being operable in response to said gauge each time said gauge shows a predetermined approach to an off-size limit of a workpiece, k. means for incrementally actuating said wheel adjusting means to effect a predetermined compensation for wear of the grinding wheel as indicated by said gauge, l. an adjustment counter set for a predetermined number of increments of adjustment of said wheel support, m. and a work counter operable after a predetermined number of workpieces have been ground to advance said grinding wheel by the used number of said predetermined number of increments and for effecting transverse movement of said truing tool to adjust said truing tool by an amount equal to the adjustment of said grinding wheel by said predetermined number of increments.
Claim 2
Dependent Claim
220 words
A grinding machine comprising a. a grinding wheel and grinding wheel support, b. a work support, c. means for moving said grinding wheel support toward and from said work support including d. a feed mechanism, e. a dressing device including f. a truing tool, g. means for effecting relative transverse and longitudinal movements between said truing tool and said grinding wheel to perform a dressing operation, h. a guage for measuring workpieces, i. wheel adjusting means for actuating said feed mechanism for adjusting said grinding wheel relative to said workpiece, j. said wheel adjusting means being operable in response to said gauge each time said gauge shows a predetermined approach to an off-size limit of a workpiece, k. means for incrementally actuating said wheel adjusting means to effect a predetermined compensation for wear of the grinding wheel as indicated by said gauge, l. an adjustment counter set for a predetermined number of increments of adjustment of said wheel support, m. and a work counter operable after a predetermined number of workpieces have been ground to advance said grinding wheel by the used number of said predetermined number of increments and for effecting transverse movement of said truing tool to adjust said truing tool by an amount equal to the adjustment of said grinding wheel by said predetermined number of increments.
Claim 3
Dependent Claim
65 words
The grinding machine of claim 1 having means operable after the advance of said truing tool to initiate said longitudinal movement to dress said grinding wheel by an amount corresponding to the adjustment of said grinding wheel by said remaining increments, whereby when said grinding wheel is advanced for the next grinding operation, it will be in position to grind a workpiece to nominal size.
Claim 4
Dependent Claim
36 words
The grinding machine of claim 1 wherein said means for effecting incremental feeding of said grinding wheel and said means for effecting transverse adjustment of said truing tool are both accomplished by ratchet type drive mechanisms.
Claim 5
Dependent Claim
65 words
The grinding machine of claim 1 wherein a. said means for effecting incremental feeding of said grinding wheel and said means for effecting transverse adjustment of said truing tool are both fluid actuated means controlled by electrically positioned valves, b. said adjustment counter and said work counters have electrical control components, c. and there is an electrical control circuit coupling said counters and said valves.
Claim 6
Dependent Claim
33 words
The grinding machine of claim 1 wherein said feed mechanism is operable to retract said grinding wheel after each grinding operation and to progressively feed said grinding wheel towards a next positioned workpiece.
Claim 7
Dependent Claim
46 words
The grinding machine of claim 1 wherein said feed mechanism is operable to retract said grinding wheel after each grinding operation and to progressively feed said grinding wheel towards a next positioned workpiece to a predetermined position to automatically grind a workpiece to a predetermined size.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |