US Patent: 3,580,135
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| Clamping Apparatus for a Machine Tool
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Patentee:
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| Gordon H. Jones (exact or similar names) - Van Dyne, Fond Du Lac County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 03, 1969 |
| Granted: |
May 25, 1971 |
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Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
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Description: |
| e present application a continuation-in-part of applicant's previously filed, co-pending application, filed on 12 July, 1968 now U.S. Pat. No. 3,540,346 and entitled "Machine Tool Having Longitudinally Adjustable Machining Spindle Hydraulically Clamped for Operation." In addition, the spindle clamping apparatus of the present invention also relates to a machine tool of the general type described and claimed in U.S. application filed on 12 July, 1968 now U.S. Pat. No. 3,516,328 and entitled "Machine Tool with Longitudinally Adjustable and Hydraulically Clamped Rotary Machine Spindle."
Abstract:
A machine tool having a longitudinally adjustable machining spindle carried by a rotary spindle sleeve and securely clamped releasably within the sleeve by a clamping bushing encircling the spindle. The clamping bushing is force fitted within the encircling structure of the sleeve so that residual compressive stresses are established. The sleeve and clamping bushing define an elongate, annular chamber, cylindrical in nature, which is disposed intermediate the ends of said bushing and sealed to render same a fluid chamber. Fluid pressure means are associated with said chamber to provide fluid under pressure, whereby said clamping bushing is restricted circumferentially to effect hard compressive contact with a machine tool spindle. The clamping arrangement utilizes a relatively thick, stiff clamping bushing structure in conjunction with a plenum chamber that is extremely narrow in section, whereby numerous advantages over prior clamps are attained. |
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