GB1171571A - Machine Tools - Google Patents
Machine ToolsInfo
- Publication number
- GB1171571A GB1171571A GB582968A GB582968A GB1171571A GB 1171571 A GB1171571 A GB 1171571A GB 582968 A GB582968 A GB 582968A GB 582968 A GB582968 A GB 582968A GB 1171571 A GB1171571 A GB 1171571A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluid
- grooves
- piston
- distributer
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
- B23B31/30—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
- B23B31/302—Hydraulic equipment, e.g. pistons, valves, rotary joints
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/02—Amplitude modulation, i.e. PAM
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
1,171,571. Machine tool details; hollow spindle lathe. S-P. MFG. CORP. 6 Feb., 1968, No. 5829/68. Headings B3B and B3T. [Also in Division F2] Apparatus for actuating the draw-bar of a lathe chuck comprises a piston 16 which is connected to the rotatable draw-bar and which is movable in a rotating cylinder 18 which has an extension 18a of relatively smaller diameter around which is placed a stationary distributer 12 through which hydraulic pressure fluid is supplied via passageways 25 and 28 to cylinder chamber 19. The piston 16 and cylinder 18 are held against relative rotation by pins 78. The distributer 12 has ports 48, 49 leading into grooves 45, 46 that are aligned with openings into the passageways 25, 28 to supply and exhaust the chamber 19. The distributer is separated from the surface of the extension 18a of the cylinder by a fluid bearing in which pressure fluid is supplied, via conduits in the distributer body, to circumferentially spaced cavities arranged in two groups 34a-34d and 35a-35d, the pressure fluid flowing axially from the cavities to collector grooves 52, 54, 60 and 61 which drain into a drain conduit 56. Any fluid passing axially past the grooves 60 or 61 is picked up by grooves 66 or 67 and flung centrifugally into further collector grooves 64, 65. Restrictive portions 39a-39d and 43a- 43d in the supply conduits control the pressure and flow to the bearing surfaces. Separate pressure fluid supplies are used for operating the piston 16 and supplying the fluid bearing. In an alternative embodiment (Figs. 4-6, not shown) a single pressure fluid supply is used for operating both the piston and the fluid bearing, some of the cavities of the fluid bearing being connected with the fluid supply passageway serving one end of the cylinder chamber and the rest of the cavities being connected with the passageways serving the other end of the cylinder chamber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB582968A GB1171571A (en) | 1968-02-06 | 1968-02-06 | Machine Tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB582968A GB1171571A (en) | 1968-02-06 | 1968-02-06 | Machine Tools |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1171571A true GB1171571A (en) | 1969-11-19 |
Family
ID=9803399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB582968A Expired GB1171571A (en) | 1968-02-06 | 1968-02-06 | Machine Tools |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1171571A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0339204A2 (en) * | 1988-04-27 | 1989-11-02 | SMW Schneider & Weisshaupt GmbH | Admission device for pressurized fluids |
GB2302144A (en) * | 1995-05-31 | 1997-01-08 | Ntn Toyo Bearing Co Ltd | Externally pressurised air bearing spindle |
-
1968
- 1968-02-06 GB GB582968A patent/GB1171571A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0339204A2 (en) * | 1988-04-27 | 1989-11-02 | SMW Schneider & Weisshaupt GmbH | Admission device for pressurized fluids |
EP0339204A3 (en) * | 1988-04-27 | 1990-09-26 | Smw Schneider & Weisshaupt Gmbh | Admission device for pressurized fluids |
GB2302144A (en) * | 1995-05-31 | 1997-01-08 | Ntn Toyo Bearing Co Ltd | Externally pressurised air bearing spindle |
GB2302144B (en) * | 1995-05-31 | 2000-01-12 | Ntn Toyo Bearing Co Ltd | Externally pressurized air bearing spindle |
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