Spindle driver for machine tools
OwnerManuel C. Turchaninventor
Life of this patent
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Abstract
A spindle driver for a machine tool is disclosed which is adapted to move the spindle and a tool driven thereby in a helical path with variable pitch and with an orbital radius which may be varied. A quill is mounted on a support member and driven by a variable pitch drive mechanism in the form of a differential lead screw to provide a selectable ratio of axial motion to rotative motion of the quill. A spindle carrier is rotatably mounted on the quill for rotation about an eccentric axis offset from the quill axis. A spindle motor and a spindle driven thereby is mounted on a carrier with the spindle axis offset from the eccentric rotation axis. The orbital radius for the spindle is adjustable by rotation of the spindle carrier about the eccentric rotation axis to adjust the offset of the spindle axis.
Claims17
A spindle driver for use in a machine tool comprising;
- a support member,
- a quill mounted on said support member for rotation about a quill rotation axis and for motion along said quill rotation axis,
- a spindle carrier comprising an eccentric member mounted for rotation in said quill about an eccentric rotation axis offset from said quill rotation axis,
- a spindle motor mounted on said eccentric member for rotation about a spindle rotation axis and adapted to support a tool for rotation therewith, said spindle rotation axis being offset from said eccentric rotation axis,
- servo motor means coupled with said eccentric member for producing relative translational movement between said spindle rotation axis and said quill rotation axis, and
- a variable pitch drive for simultaneously displacing said quill angularly about said quill rotation axis and axially along said quill rotation axis in a predetermined ratio of angular and axial velocity.
A spindle driver for use in a machine tool comprising:
- a support member,
- a quill comprising a hollow shaft mounted on said support member for rotation about a quill rotation axis and for motion along said quill rotation axis,
- a spindle carrier comprising an eccentric member rotatably mounted within said quill for rotation about an eccentric rotation axis offset from said quill rotation axis,
- a spindle motor mounted on said eccentric member and a spindle coupled with said spindle motor for rotation about a spindle rotation axis and adapted to support a tool for rotation therewith, said spindle rotation axis being offset from said eccentric rotation axis,
- means for rotating said eccentric member about said eccentric rotation axis for producing relative translational movement between said spindle rotation axis and said quill rotation axis,
- and variable pitch drive means for simultaneously displacing said quill angularly about said quill rotation axis and axially along said quill rotation axis in a predetermined ratio of angular and axial displacement.
Dependencies are inferred from the claim text.