US4513380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of tool recovery in threadcutting apparatus
Assignee: General Electric Co
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Filing: 1982-09-07
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Granted: 1985-04-23
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Expires: 2002-09-07
Abstract
Abstract A method for operating a computer controlled industrial machine, such as a lathe, in which a machining operation can be interrupted, a tool displaced from a workpiece and the operation subsequently resumed at the point of interruption. The method includes provision for interrupting canned cycles, such as threadcutting cycles on a lathe, in a manner to prevent damage to any previously cut threads. In one embodiment, the method provides for retrace of prior machining operations before resuming the interrupted operation.
Inventors
- 👤 Jerrold C. Spooner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:20
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/414; G05B19/182; G05B19/186; G05B2219/00; G05B2219/30; G05B2219/33; G05B2219/33129; G05B2219/34; G05B2219/34015; G05B2219/34365; G05B2219/45; G05B2219/45141; G05B2219/45214; G05B2219/50; G05B2219/50103; G05B2219/50109; G05B2219/50208; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/300056; Y10T409/300168; Y10T409/30028; Y10T82/00; Y10T82/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
153 words
A method for interrupting a machine operation in a computer numerical control (CNC) system in which the CNC is programmed to position a cutting tool with respect to a workpiece such that relative motion between the tool and workpiece wil allow the workpiece to be machined to a desired configuration, the program defining a start point for the machining operation, the CNC system including input means for receiving an interrupt command, said method comprising in response to an interrupt command, the steps of: (a) determining whether the system is operating in a threadcutting mode; (b) providing, if in a threadcutting mode, a first command to cause the cutting tool to pull out from the workpiece while continuing motion in the direction of threadcutting; (c) providing, if not in a threadcutting mode, an abort command to terminate all machining operations; and (d) generating a pull-out command to cause the tool to exit the workpiece.
Claim 2
Independent Claim
153 words
A method for interrupting a machine operation in a computer numerical control (CNC) system in which the CNC is programmed to position a cutting tool with respect to a workpiece such that relative motion between the tool and workpiece wil allow the workpiece to be machined to a desired configuration, the program defining a start point for the machining operation, the CNC system including input means for receiving an interrupt command, said method comprising in response to an interrupt command, the steps of: (a) determining whether the system is operating in a threadcutting mode; (b) providing, if in a threadcutting mode, a first command to cause the cutting tool to pull out from the workpiece while continuing motion in the direction of threadcutting; (c) providing, if not in a threadcutting mode, an abort command to terminate all machining operations; and (d) generating a pull-out command to cause the tool to exit the workpiece.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein in step (b) a pull-out rate is established in response to the interrupt command for causing the cutting tool to pull out at a rate greater than the normal pull-out rate.
References Cited (Backward Citations)
US3878742A
Cited
US3854353A
Cited
US4045660A
Cited
US4096770A
Cited
US4225928A
Cited
US4173786A
Cited
US4365300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |