Patent US763324A successfully refreshed from Google Patents.
US3834084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo copying machining apparatus
Assignee: Toyoda Koki KK
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Filing: 1973-06-19
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Granted: 1974-09-10
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Expires: 1993-06-19
Abstract
Abstract A servo copying machining apparatus comprises a main spindle rotatably journalled on a headstock capable of a copying motion. The spindle carries work mounting means and a template having a not truly circular curved surface. A stylus on the bed is urged against the curved surface and is associated with a displacement detector which detects the displacement of the stylus. A first servo motor responds to the detector output to initiate a copying motion of the headstock. A tool carriage carrying a tool is movable in a direction parallel to the direction of the movement of the headstock and is driven by a second servo motor. A second displacement detector senses the displacement of the tool carriage that results from a correcting copying motion of the tool carriage under the control of the second servo motor, which is controlled in accordance with the deviation between the outputs from the first and second displacement detectors.
Inventors
- 👤 K Sakane
- 👤 W Iida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:32
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/16; Y; Y10; Y10T; Y10T408/00; Y10T408/39; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/301176; Y10T409/301624; Y10T409/30168; Y10T82/00; Y10T82/12; Y10T82/122
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
A servo copying machining apparatus comprising a headstock guided on a base so as to be capable of a copying motion, a main spindle rotatably journalled on the headstock and including work mounting means and a template having a curved surface corresponding to a not truly circular curved surface which is to be machined in the work, a stylus on the base and adapted to contact the curved surface of the template in a tracking manner, a first displacement detector for produceing an output in accordance with the amount of displacement of the stylus, a first servo motor responsive to the output of the detector for subjecting the headstock to a copying motion, a tool carriage carrying a tool which machines the work and guided in a direction parallel to the direction of movement of the headstock, a second servo motor for subjecting the tool carriage to a correcting copying motion, a second displacement detector for detecting the amount of displacement of the tool carriage which results from the correcting copying motion, and means for generating a deviation output in response to the outputs from the first and second displacement detectors, said deviation output being applied to drive the second servo motor.
Claim 2
Dependent Claim
202 words
A servo copying machining apparatus comprising a headstock guided on a base so as to be capable of a copying motion, a main spindle rotatably journalled on the headstock and including work mounting means and a template having a curved surface corresponding to a not truly circular curved surface which is to be machined in the work, a stylus on the base and adapted to contact the curved surface of the template in a tracking manner, a first displacement detector for produceing an output in accordance with the amount of displacement of the stylus, a first servo motor responsive to the output of the detector for subjecting the headstock to a copying motion, a tool carriage carrying a tool which machines the work and guided in a direction parallel to the direction of movement of the headstock, a second servo motor for subjecting the tool carriage to a correcting copying motion, a second displacement detector for detecting the amount of displacement of the tool carriage which results from the correcting copying motion, and means for generating a deviation output in response to the outputs from the first and second displacement detectors, said deviation output being applied to drive the second servo motor.
Claim 3
Dependent Claim
75 words
A servo copying machining apparatus according to claim 1, which further comprises an intermediate base slidably mounted on said base and carrying said tool carriage, and an in-feed drive unit for imparting an in-feed motion to said intermediate base, said second displacement detector being located on said intermediate base so as to be capable of detecting the correcting copying motion of said tool carriage independently of said in-feed motion provided by said in-feed drive unit.
Claim 4
Dependent Claim
57 words
A servo copying machining apparatus according to claim 1 further including an in-feed drive unit for imparting an in-feed motion to the tool carriage, said second displacement detector being located so as to be capable of detecting only the correcting copying motion of the tool carriage independently from the in-feed motion provided by the in-feed drive unit.
Claim 5
Dependent Claim
50 words
A servo copying machining apparatus according to claim 3, wherein said in-feed drive unit includes a threaded shaft threadably engaging with the tool carriage, said threaded shaft being only rotationally connected with the in-feed drive unit, the axial translation of the threaded shaft being governed by the second servo motor.
Claim 6
Dependent Claim
86 words
A servo copying machining apparatus according to claim 3, wherein said in-feed drive unit includes a first shaft threadably engaged with said tool carriage, and a nut case mounted on said tool carriage and only rotatably connected with said first shaft, said nut case being slidable in axial direction thereof, but being prevented from rotation thereof, and wherein said second servo motor includes a second shaft only rotatably mounted on said base and threadably engages with a nut which is fixedly mounted on said nut case.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |