US3694970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offset size adjustment circuit for grinding machines
Assignee: Northrop Grumman Systems Corp
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Filing: 1970-09-18
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Granted: 1972-10-03
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Expires: 1990-09-18
Abstract
Abstract An automatic machine, which includes a gage mechanism, for grinding workpieces having axially spaced portions of different diameters is disclosed. The gage mechanism, which is used to determine the diameter of each workpiece portion to assure that the workpiece is within certain tolerances, includes a workpiece engaging element or caliper of the chordal type which supplies a signal, indicative of the sensed diameter of a workpiece portion, to a summing network. The summing network also receives a signal from a digital to analog converter arranged to convert a digital signal from a card reader into an analog signal indicative of a desired diameter of a workpiece portion. An analog size offset circuit is arranged to supply an offset signal to the digital to analog converter. The offset circuit provides, in addition to a settable common offset signal, an additional programmed offset signal which is derived from a second analog to digital converter supplied with digital signals from thumbwheel switches which receive enabling signals from a program sequence controller. The controller also supplies enabling signals to the card reader associated with the first-mentioned digital to analog converter.
Inventors
- 👤 Stanley C Schoonover
- 👤 Lester R Luckenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:51
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/02; B24B49/04; B24B51/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
146 words
In a grinding machine, a. a bed, b. a workpiece support on said bed having means for supporting a workpiece, c. a workpiece wheel support, d. means for effecting relative transverse movement of said supports, e. gage means positionable to engage portions of a workpiece to be ground and including means for generating a size signal indicative of the size of that portion of a workpiece with which engagement is made, f. means for providing signals indicative of desired sizes for said portions of a workpiece, g. means for providing individual offset signals for each of said portions of a workpiece, and h. means responsive to said size signal, said signals indicative of desired sizes for said portions of a workpiece and said individual offset signals for each of said portions of a workpiece for controlling said means for effecting relative transverse movement of said supports.
Claim 2
Dependent Claim
146 words
In a grinding machine, a. a bed, b. a workpiece support on said bed having means for supporting a workpiece, c. a workpiece wheel support, d. means for effecting relative transverse movement of said supports, e. gage means positionable to engage portions of a workpiece to be ground and including means for generating a size signal indicative of the size of that portion of a workpiece with which engagement is made, f. means for providing signals indicative of desired sizes for said portions of a workpiece, g. means for providing individual offset signals for each of said portions of a workpiece, and h. means responsive to said size signal, said signals indicative of desired sizes for said portions of a workpiece and said individual offset signals for each of said portions of a workpiece for controlling said means for effecting relative transverse movement of said supports.
Claim 3
Dependent Claim
40 words
A grinding machine according to claim 1, wherein said means for providing individual offset signals for each of said portions of a workpiece is adjustable to provide an individually adjustable offset signal for each of said portions of a workpiece.
Claim 4
Dependent Claim
41 words
A grinding machine according to claim 1, wherein said means for providing individual offset signals for each of said portions of a workpiece is operative to provide for grinding each of said portions of a workpiece a preselected amount of oversize.
Claim 5
Dependent Claim
69 words
A grinding machine according to claim 1, wherein said means for providing individual offset signals includes a first means for providing a first predetermined common offset signal, a second means for providing an individual second offset signal during grinding of each of said portions of a workpiece, and means for combining said first predetermined common offset signal and each individual second offset signal to establish said individual offset signals.
Claim 6
Dependent Claim
33 words
A grinding machine according to claim 4, wherein said first means is selectively operable to remove said first predetermined common offset signal whereby only each of the individual second offset signals provide offset.
Claim 7
Dependent Claim
31 words
A grinding machine according to claim 4, wherein said second means for providing an individual offset signal is adjustable for providing differing amounts of offset for said portions of a workpiece.
Claim 8
Dependent Claim
34 words
A grinding machine according to claim 6, wherein said second means for providing an individual offset signal includes means for selectively reversing the direction of offset for each of said portions of a workpiece.
Claim 9
Dependent Claim
37 words
A grinding machine according to claim 1, wherein said means for providing individual offset signals for each of said portions of a workpiece is adjustable for providing differing amounts of offset for said portions of a workpiece.
Claim 10
Dependent Claim
40 words
A grinding machine according to claim 8, wherein said means for providing individual offset signals for each of said portions of a workpiece includes means for selectively reversing the direction of offset for each of said portions of a workpiece.
Claim 11
Dependent Claim
65 words
A grinding machine according to claim 1, wherein said means for providing individual offset signals comprise a digital to analog converter, means coupled to said digital to analog converter for providing predetermined digital signals thereto corresponding respectively to desired offset for each of said portions of a workpiece, and an analog size offset circuit coupled to receive an output from said digital to analog converter.
Claim 12
Dependent Claim
143 words
A grinding machine according to claim 10, including a second digital to analog converter, said second digital to analog converter having a first input coupled to said means for providing signals indicative of desired sizes for said portions of a workpiece, the last said means being operative to provide digital signals indicative of the desired sizes for said portions of a workpiece; said second digital to analog converter having a second input coupled to receive an output from said analog size offset circuit for modifying an analog output signal from said second digital to analog converter; and a summing network coupled to said second digital to analog converter for receiving said analog output therefrom and to said gage means for receiving the size signals therefrom, said summing network having an output coupled to said means for effecting relative transverse movement of said supports.
Claim 13
Dependent Claim
26 words
A grinding machine according to claim 11, wherein the output from said summing network is coupled to means for producing qualifying signals and on size signals.
Claim 14
Dependent Claim
21 words
A grinding machine according to claim 12, wherein said means for producing qualifying signals and on size signals include meter means.
Claim 15
Dependent Claim
25 words
A grinding machine according to claim 13, wherein said meter means comprise a meter for indicating coarse dimensions and a meter for indicating fine dimensions.
Claim 16
Dependent Claim
32 words
A grinding machine according to claim 10, wherein said analog size offset circuit includes means for providing a common offset signal and for processing said output from said digital to analog converter.
Claim 17
Dependent Claim
28 words
A grinding machine according to claim 15, wherein said means for providing a common offset signal is adjustable whereby the common offset signal may be reduced to zero.
Claim 18
Dependent Claim
119 words
In a machine tool, a. means for effecting relative movement between a tool support and a work support of a machine tool in order to control stock removal from a workpiece carried by the work support, b. means for controlling said means for effecting relative movement including program means for providing a plurality of distinct relative movements of said tool support and said work support during a machine operation, and c. offset means coupled to said means for controlling including means for automatically providing thereto individual offset signals for each of said distinct relative movements whereby an individual amount of offset may be provided during each of said distinct relative movements between said tool support and said work support.
Claim 19
Dependent Claim
119 words
In a machine tool, a. means for effecting relative movement between a tool support and a work support of a machine tool in order to control stock removal from a workpiece carried by the work support, b. means for controlling said means for effecting relative movement including program means for providing a plurality of distinct relative movements of said tool support and said work support during a machine operation, and c. offset means coupled to said means for controlling including means for automatically providing thereto individual offset signals for each of said distinct relative movements whereby an individual amount of offset may be provided during each of said distinct relative movements between said tool support and said work support.
Claim 20
Dependent Claim
19 words
A machine tool according to claim 17, wherein said offset means is adjustable for providing individually adjustable offset signals.
Claim 21
Dependent Claim
62 words
A machine tool according to claim 17, wherein said offset means includes a first means for providing a first predetermined common offset signal, a second means for providing an individual second offset signal during each of said distinct relative movements and means for combining said first predetermined common offset signal and each individual second offset signal to establish said individual offset signals.
Claim 22
Dependent Claim
32 words
A machine tool according to claim 19, wherein said first means is selectively operable to remove said first predetermined common offset signal whereby only each of the individual offset signals provide offset.
Claim 23
Dependent Claim
21 words
A machine tool according to claim 17, including means for selectively reversing the direction of offset for each distinct relative movement.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |