Patent US3840792A successfully refreshed from Google Patents.
US3840792A
Expired / Lapsed
US
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Numerical control device for machine tools
Assignee: Toyoda Koki KK
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Filing: 1973-01-09
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Granted: 1974-10-08
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Expires: 1993-01-09
Abstract
Abstract A numerical control device for machine tools, especially for grinding machines, comprises pulse generators which generate pulse signals of a predetermined number corresponding to the amount of time of one dressing on a grinding wheel, counters which respectively integrate the pulse signals from the pulse generators for storing the total dressing amount for the grinding wheel, and operation means which serve to add or subtract the contents in the counter corresponding to the total dressing amount from numerical information which is provided for controlling the relative movement between a workpiece and the grinding wheel, whereby the numerical information is compensated in accordance with the reduction of the grinding wheel dimension.
Inventors
- 👤 I Yokoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:04
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/416; G05B19/4166; B; B24; B24B; B24B49/00; B24B49/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
186 words
In a numerical control device for machine tools, particularly grinding machines, having information reading means for reading numerical control information from a numerical control information source, decoding means for decoding said numerical control information supplied from said information reading means, and a control circuit for controlling at least one grinding machine in accordance with said numerical control information supplied from said decoding means thereto the improvement comprising: at least one pulse generating means for generating a predetermined number of pulse signals corresponding to a dressing amount of a grinding wheel when the same is being dressed; at least one counter connected to said pulse generating means for automatically integrating said pulse signals out of said pulse generating means; operating means connected to said counter and said information reading means for automatically modifying numerical data on a movement of said machine tool grinding machine in said numerical control information supplied from said information reading means by a total dressing amount integrated in said counter; and, drive control means for controlling the movement of said grinding machine by said compensated or modified numerical data from said operating means.
Claim 2
Dependent Claim
186 words
In a numerical control device for machine tools, particularly grinding machines, having information reading means for reading numerical control information from a numerical control information source, decoding means for decoding said numerical control information supplied from said information reading means, and a control circuit for controlling at least one grinding machine in accordance with said numerical control information supplied from said decoding means thereto the improvement comprising: at least one pulse generating means for generating a predetermined number of pulse signals corresponding to a dressing amount of a grinding wheel when the same is being dressed; at least one counter connected to said pulse generating means for automatically integrating said pulse signals out of said pulse generating means; operating means connected to said counter and said information reading means for automatically modifying numerical data on a movement of said machine tool grinding machine in said numerical control information supplied from said information reading means by a total dressing amount integrated in said counter; and, drive control means for controlling the movement of said grinding machine by said compensated or modified numerical data from said operating means.
Claim 3
Dependent Claim
42 words
A numerical control device as in claim 1, further comprising gate circuit means provided between said counter and said operating means for controlling data transmission from said counter to said operating means by means of selection signals in said numerical control information.
Claim 4
Dependent Claim
32 words
A numerical control device as in claim 2, wherein said operating means is able to add said total decrement amount in said counter to said numerical data in said numerical control information.
Claim 5
Dependent Claim
37 words
A numerical control device as in claim 2, wherein said operating means is able to subtract said total decrement amount in said counter from said numerical data in accordance with control signals in said numerical control information.
Claim 6
Dependent Claim
26 words
A numerical control device as in claim 3, further comprising a timing control circuit for controlling timing of said pulse generating means and said operating means.
Claim 7
Dependent Claim
26 words
A numerical control device as in claim 4, further comprising a timing control circuit for controlling timing of said pulse generating means and said operating means.
Claim 8
Dependent Claim
70 words
A numerical control device as in claim 3, further comprising at least one presetable down counter in which a preset value corresponding to an initial dimension of said grinding wheel is reduced by said pulse signals out of said pulse generating means for storing an actual dimension of said cutting tool grinding wheel, and gate circuit means for controlling data transmission from said presetable down counter to said operating means.
Claim 9
Dependent Claim
28 words
A numerical control device as in claim 2, wherein the number of said pulse signals from said pulse generating means is adjustable in accordance with said dressing amount.
Claim 10
Dependent Claim
188 words
In a numerical control device for a machine tool, particularly a grinding machine having a tape reader, a decoder for decoding numerical control information from said tape reader, a register circuit for storing said numerical control information from said decoder, and a control circuit for controlling said grinding machine in accordance with said numerical control information, the improvement comprising: a plurality of pulse generators for respectively generating a predetermined number of pulse signals when respective grinding surfaces of a grinding wheel are dressed or trued by a predetermined amount; a plurality of counters for respectively integrating said pulse signals from said pulse generators; operating means for modifying numerical data on a movement of said grinding machine by a total dressing amount stored in one of said counters, said operating means being able to add said total dressing amount to said numerical data in accordance with numerical control information; gate circuit means for selectively serving to allow a transmission of data integrated in one of said counters therefrom to said operating means; and drive control means for controlling the movement of said grinding machine by said modified numerical data.
Claim 11
Dependent Claim
188 words
In a numerical control device for a machine tool, particularly a grinding machine having a tape reader, a decoder for decoding numerical control information from said tape reader, a register circuit for storing said numerical control information from said decoder, and a control circuit for controlling said grinding machine in accordance with said numerical control information, the improvement comprising: a plurality of pulse generators for respectively generating a predetermined number of pulse signals when respective grinding surfaces of a grinding wheel are dressed or trued by a predetermined amount; a plurality of counters for respectively integrating said pulse signals from said pulse generators; operating means for modifying numerical data on a movement of said grinding machine by a total dressing amount stored in one of said counters, said operating means being able to add said total dressing amount to said numerical data in accordance with numerical control information; gate circuit means for selectively serving to allow a transmission of data integrated in one of said counters therefrom to said operating means; and drive control means for controlling the movement of said grinding machine by said modified numerical data.
Claim 12
Dependent Claim
188 words
In a numerical control device for a machine tool, particularly a grinding machine having a tape reader, a decoder for decoding numerical control informations from said tape reader, a register circuit for storing said numerical control information from said decoder, and a control circuit for controlling said grinding machine in accordance with said numerical control information, the improvement comprising: a plurality of pulse generators for respectively generating a predetermined number of pulse signals when respective grinding surfaces of a grinding wheel are dressed or trued by a predetermined amount; a plurality of counters for respectively integrating said pulse signals out of said pulse generators. operating means for modifying numerical data on a movement of said grinding machine by a total dressing amount stored in one of said counters, said operating means being able to subtract said total dressing amount from said numerical data in accordance with numerical information; gate circuit means for selectively serving to allow a transmission of data integrated in one of said counters therefrom to said Operating means; and drive control means for controlling the movement of said grinding machine by said modified numerical data.
Claim 13
Dependent Claim
188 words
In a numerical control device for a machine tool, particularly a grinding machine having a tape reader, a decoder for decoding numerical control informations from said tape reader, a register circuit for storing said numerical control information from said decoder, and a control circuit for controlling said grinding machine in accordance with said numerical control information, the improvement comprising: a plurality of pulse generators for respectively generating a predetermined number of pulse signals when respective grinding surfaces of a grinding wheel are dressed or trued by a predetermined amount; a plurality of counters for respectively integrating said pulse signals out of said pulse generators. operating means for modifying numerical data on a movement of said grinding machine by a total dressing amount stored in one of said counters, said operating means being able to subtract said total dressing amount from said numerical data in accordance with numerical information; gate circuit means for selectively serving to allow a transmission of data integrated in one of said counters therefrom to said Operating means; and drive control means for controlling the movement of said grinding machine by said modified numerical data.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |