US Patent: 3,516,306
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| Boring Head for Machine Tools
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Patentee:
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| Johann Müller (exact or similar names) - Unterhaching, Munich District, Bavaria, Germany |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 12, 1968 |
| Granted: |
Jun. 23, 1970 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Friedrich Deckel GmbH
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Description: |
| Claim priority, application in Austria, 31 Aug., 1967.
Abstract:
A boring head for application to a machine tool such as a milling machine, has a rotatable flange on which a tool holder is displaceable in a diametrical direction perpendicular to the axis of rotation of the flange. To enable precise reading of the extent to which the tool holder is displaced radially from a given position, the displaceable tool holder is provided with a scale parallel to the direction of displacement, read by means of a magnifying glass also displaceable for adjustment in the same direction, the magnifying glass being mounted on a bracket arm swingable on a pivot on a stationary part of the housing containing the bearings for the rotatable flange. The pivot on which the magnifying lens swings is at right angle to the axis of rotation of the flange, and the parts are so arranged that when the magnifying lens is not in use for reading the displacement scale, it may be swung up to a position out of the way of the coolant and the chips. Background of the invention In the machine tool art, it is known to have a boring head which includes a rotatable flange on which a tool holder is mounted for displacement in a direction radially, or diametrically with respect to the axis of rotation of the flange, so that the tool may perform facing or boring operations concentrically around the axis of rotation of the flange, at a distance therefrom which is variable by varying the extent of radial displacement of the tool holder. It is also known to provide the displaceable tool holder with a scale for reading the extent of displacement, the index of the scale being developed at times as a vernier. An example of this is the construction disclosed in Swiss Pat. 232,960, granted in 1944. The accuracy obtainable by such a construction is, however, frequently not sufficient.
Claim:
A boring head comprising a nonrotating housing, a rotatable member rotatable with respect to said housing about ani axis of rotation, a tool holder mounted on said rotatable member for displacement thereon in a radial direction with respect to said axis of rotation, a graduated scale mounted on said tool holder and extending in a direction parallel to said direction of displacement of said tool holder, and a magnifying lens mounted on said housing effective position for reading said scale to an ineffective for swinging movement relative thereto from an 5position substantially removed from said scale. |
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