Cutting by use of rotating axially moving tool – Machine frame
Patent
1977-04-06
1978-04-04
Hinson, Harrison L.
Cutting by use of rotating axially moving tool
Machine frame
B23B 4700
Patent
active
040824764
ABSTRACT:
The invention relates to machine tool-building and can be successfully utilized in machine tools intended for finishing working of high-precision work, wherein there is necessary to maintain either precise spacing of the axes of openings being bored, or else precise spacing of these axes from the reference bases of workpieces being worked upon. The disclosed machine comprises a framework, a work table adapted to have workpieces secured thereon, mounted on the framework for displacement in the course of a boring operation, and either one or two bridge structures, mounted on the framework, each carrying at least one spindle head with a tool spindle. The housing of the spindle head is secured on the side of the respective bridge structure, facing the work table, the housing of the spindle head being attached so that the axis of the spindle is offset relative to the axis of symmetry of the bridge structure. Besides, the housing of the spindle head is retained against displacement with respect to the said side of the bridge structure by means of pins pressure-fitted in said housing. In accordance with the invention, the said pins are arranged in the housing of the spindle head so that the plane including their axes is offset relative to a parallel plane including the axis of the spindle in a direction opposite to one toward the axis of symmetry of the bridge structure. The machine offers higher precision of working than other machines of the same kind, for it compensates for temperature-induced displacement of the axes of the spindles in a direction parallel to the plane of attachment of the spindle head to the bridge structure.
REFERENCES:
patent: 1759388 (1930-05-01), Bockhoff
patent: 2028727 (1936-01-01), Perrf et al.
patent: 2864269 (1958-12-01), Mottu
patent: 3158044 (1964-11-01), Jones
Adams Bruce L.
Burns Robert E.
Hinson Harrison L.
Lobato Emmanuel J.
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