US4811523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for fine machining of plane surfaces of disk-shaped workpieces having an unmachined bearing side and a slight wall thickness
Assignee: SUPFINA MASCHINENFABRIK HENTZEN KG A CORP OF GERMANY
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Filing: 1986-04-21
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Granted: 1989-03-14
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Expires: 2006-04-21
Abstract
Abstract An apparatus for fine machining of plane surfaces of disk-shaped workpieces having an unmachined bearing side and a slight wall thickness is described. The apparatus is provided with a chuck, preferably realted, for receiving the workpiece and a cup wheel. To assure that the pieces are supported over a defined and sufficiently large area to prevent both tilting during the machining and bending due to the machine pressure, so that a surface of highly accurate shape is attainable, the chuck for receiving the workpiece is provided with three fixed support pins distributed over the circumference and against which the workpiece is pressed. Between the three fixed support pins, a plurality of further support elements are provided, which can be supportingly fixed against the bearing side of the workpiece once the workpiece has been placed upon the three fixed support pins.
Inventors
- 👤 Heinz-Gunter Schmitz
- 👤 Johann Konken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:08
CPC Classifications
B; B24; B24B; B24B41/00; B24B41/06; B24B41/068; B23; B23Q; B23Q3/00; B23Q3/02; B23Q3/06; B23Q3/08; B23Q3/082; B24B7/00; B25; B25B; B25B11/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
94 words
An apparatus for the fine machining of the plane surfaces of disk-shaped workpieces having an unmachined bearing side and slight wall thickness, comprising: a rotatable chuck including three support pins, and at least one displaceably mounted support element located between adjacent pairs of pins, each of said pins being located about a periphery of said chuck for engagement with the unmachined side of the workpieces, in which engagement position the support elements are fastened; and tool means for pressing the unmachined bearing side of the workpiece against said pins and support elements for machining.
Claim 2
Independent Claim
94 words
An apparatus for the fine machining of the plane surfaces of disk-shaped workpieces having an unmachined bearing side and slight wall thickness, comprising: a rotatable chuck including three support pins, and at least one displaceably mounted support element located between adjacent pairs of pins, each of said pins being located about a periphery of said chuck for engagement with the unmachined side of the workpieces, in which engagement position the support elements are fastened; and tool means for pressing the unmachined bearing side of the workpiece against said pins and support elements for machining.
Claim 3
Dependent Claim
62 words
The apparatus as defined in claim 1, wherein said support elements include a pin and means for resiliently mounting the pins in the axial direction of the pins, and wherein each support element pin is biased by its resilient mounting means into an initial position according to which the support element pin extends beyond the fixed height of its adjacent support pins.
Claim 4
Dependent Claim
22 words
The apparatus as defined in claim 2, wherein said support elements further include means for blocking the pins in their adjusted position.
Claim 5
Dependent Claim
18 words
The apparatus as defined in claim 1, wherein the three support pins are adjustable to a fixed height.
Claim 6
Dependent Claim
19 words
The apparatus as defined in claim 1, wherein the support elements are located about the periphery of said chuck.
Claim 7
Dependent Claim
30 words
The apparatus as defined in claim 1, wherein the three support pins are adjustable to a fixed height, and the support elements are located about the periphery of said chuck.
Claim 8
Independent Claim
131 words
An apparatus for the fine machining of the plane surfaces of disk-shaped workpieces having an unmachined bearing side and a slight wall thickness, comprising: a rotatable chuck including: a body; a plurality of pins adjustable to a fixed height from said body; a hydraulic collecting tank formed in said body; a plurality of hydraulic cylinders formed in said body; closable means connecting the hydraulic collecting tank with each hydraulic cylinder; and a support element displaceably mounted in each hydraulic cylinder for extending in the direction of said pins under the influence of a hydraulic medium in its respective hydraulic cylinder, said pins and support elements being located about a periphery of said body; and tool means for pressing the unmachined bearing side of the workpiece against said pins and support elements.
Claim 9
Independent Claim
131 words
An apparatus for the fine machining of the plane surfaces of disk-shaped workpieces having an unmachined bearing side and a slight wall thickness, comprising: a rotatable chuck including: a body; a plurality of pins adjustable to a fixed height from said body; a hydraulic collecting tank formed in said body; a plurality of hydraulic cylinders formed in said body; closable means connecting the hydraulic collecting tank with each hydraulic cylinder; and a support element displaceably mounted in each hydraulic cylinder for extending in the direction of said pins under the influence of a hydraulic medium in its respective hydraulic cylinder, said pins and support elements being located about a periphery of said body; and tool means for pressing the unmachined bearing side of the workpiece against said pins and support elements.
Claim 10
Dependent Claim
30 words
The apparatus as defined in claim 7, further comprising: a spring located in each hydraulic cylinder wherein said support elements each include a support pin engageable with an associated spring.
Claim 11
Dependent Claim
29 words
The apparatus as defined in claim 7, further comprising: valve means associated with the hydraulic collecting tank for controlling the connection of the collecting tank to the connecting means.
Claim 12
Independent Claim
148 words
An apparatus for the fine machining of the plane surfaces of disk-shaped workpieces having an unmachined bearing side and slight wall thickness, comprising: a rotatable chuck including a plurality of support pins adjustable to a fixed height, and at least one displaceably mounted support element located between adjacent pairs of pins, said pins and support elements being located about a periphery of said chuck for engagement with the unmachined side of the workpieces, wherein: said support elements include a pin and means for resiliently mounting the pin in the axial direction of the pin, said means for resiliently mounting a support element pin including a hydraulic cylinder and a piston displaceable within the hydraulic cylinder; and each support element pin is biased by its resilient mounting means into an initial position according to which the support element pin extends beyond the fixed height of its adjacent support pins.
Claim 13
Independent Claim
148 words
An apparatus for the fine machining of the plane surfaces of disk-shaped workpieces having an unmachined bearing side and slight wall thickness, comprising: a rotatable chuck including a plurality of support pins adjustable to a fixed height, and at least one displaceably mounted support element located between adjacent pairs of pins, said pins and support elements being located about a periphery of said chuck for engagement with the unmachined side of the workpieces, wherein: said support elements include a pin and means for resiliently mounting the pin in the axial direction of the pin, said means for resiliently mounting a support element pin including a hydraulic cylinder and a piston displaceable within the hydraulic cylinder; and each support element pin is biased by its resilient mounting means into an initial position according to which the support element pin extends beyond the fixed height of its adjacent support pins.
Claim 14
Dependent Claim
26 words
The apparatus as defined in claim 10, further comprising: a hydraulic collecting tank; and closable means for connecting the hydraulic cylinder to the hydraulic collecting tank.
Claim 15
Dependent Claim
31 words
The apparatus as defined in claim 10, wherein the means for resiliently mounting a support element pin further includes a spring within said hydraulic cylinder and in engagement with said piston.
Claim 16
Independent Claim
157 words
An apparatus for the fine machining of the plane surfaces of disk-shaped workpieces having an unmachined bearing side and slight wall thickness, comprising: a rotatable chuck including a plurality of support pins adjustable to a fixed height, and at least one displaceably mounted support element located between adjacent pairs of pins, said pins and support elements being located about a periphery of said chuck for engagement with the unmachined side of the workpieces, wherein: said support elements include a pin, means for resiliently mounting the pin in the axial direction of the pin and means for blocking the pins in their adjusted position, said means for resiliently mounting a support element pin including a hydraulic cylinder and a piston displaceable within the hydraulic cylinder; and each support element pin is biased by its resilient mounting means into an initial position according to which the support element pin extends beyond the fixed height of its adjacent support pins.
Claim 17
Independent Claim
157 words
An apparatus for the fine machining of the plane surfaces of disk-shaped workpieces having an unmachined bearing side and slight wall thickness, comprising: a rotatable chuck including a plurality of support pins adjustable to a fixed height, and at least one displaceably mounted support element located between adjacent pairs of pins, said pins and support elements being located about a periphery of said chuck for engagement with the unmachined side of the workpieces, wherein: said support elements include a pin, means for resiliently mounting the pin in the axial direction of the pin and means for blocking the pins in their adjusted position, said means for resiliently mounting a support element pin including a hydraulic cylinder and a piston displaceable within the hydraulic cylinder; and each support element pin is biased by its resilient mounting means into an initial position according to which the support element pin extends beyond the fixed height of its adjacent support pins.
Claim 18
Dependent Claim
26 words
The apparatus as defined in claim 13, further comprising: a hydraulic collecting tank; and closable means for connecting the hydraulic cylinder to the hydraulic collecting tank.
Claim 19
Dependent Claim
31 words
The apparatus as defined in claim 13, wherein the means for resiliently mounting a support element pin further includes a spring within said hydraulic cylinder and in engagement with said piston.
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) | 1992-03-13 | 1992-09-12 | 1993-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-13 | 1996-09-12 | 1997-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-13 | 2000-09-12 | 2001-03-14 | $7700.00 | Window Closed / Lapsed |