Machine tool with indexible tool support

Abstract

A machine tool comprising a headstock having a rotatable spindle for supporting and rotating a workpiece. A turret mounted on the headstock and offset to one side of the spindle carries tools to work upon a workpiece in the spindle. Bearing means offset to one side of the spindle supports the turret for indexing movement about and feed movement along an axis parallel to the spindle axis and second bearing means extending to one side of the spindle housing on the machine bed supports the first bearing means and the turret for movement toward and away from the spindle axis. The bed of the machine does not project substantially beyond the spindle housing in the direction of the spindle axis and the turret projects outwardly of the bed. The turret is movable along the axis of rotation thereof a variable distance depending upon the work to be performed.

The embodiment of the invention in which an exclusive property or privilege is claimed are defined as follows: 
     
       1. A machine tool comprising a frame, a rotatable member having an axis of rotation and having an outer end for supporting a workpiece to be machined for rotation with said member about said axis, an indexible tool support displaced to one side of said axis and comprising means for mounting tools on said tool support in a plurality of angular positions about an indexing axis parallel to said axis of rotation, a carrier, means supporting said tool support on said carrier for indexing movement relative to said carrier to index said tools to a position for machining a workpiece and for advance movement relative to said carrier in a work stroke parallel to said axis of rotation to effect the machining of said workpiece and for return movement, said tool support projecting outwardly of said carrier in a direction parallel to said axis of rotation to a retracted position and movable toward said carrier from said retracted position to a maximum advanced position, which positions define the maximum work stroke of said tool support, means supporting said carrier for movement toward and away from said axis to move a tool on said tool support transversely of said axis of rotation, said means supporting said carrier being disposed on said frame alongside said rotatable member and comprising a way extending transversely to said axis of rotation and alongside said rotatable member, and power driven means operatively connected to said tool support for indexing the latter and moving it through its work stroke. 
     
     
       2. A machine tool as defined in claim 1 wherein said means for mounting a plurality of tools comprises means for mounting turning and end-working tools on said tool supporting at each angular position and at spaced apart locations on said tool support. 
     
     
       3. A machine tool as defined in claim 1 wherein said tool support projects outwardly from said carrier at least approximately twice the distance of the maximum work stroke of said tool support to support an end-working tool for machining the workpiece for substantially the maximum work stroke of the tool support. 
     
     
       4. A machine tool as defined in claim 1 wherein said tool support has a cylindrical shaft portion fixed thereto and said carrier has bearing means receiving said shaft portion for rotation and for axial movement in the bearing means whereby said .[.turret.]. .Iadd.tool support .Iaddend.may be indexed and moved through said work stroke, said power driven means comprising means operatively connected to said shaft portion for indexing said tool support and for moving said tool support in its work stroke. 
     
     
       5. An machine tool as define in claim 1 wherein said tool mounting means of said tool support comprises means for mounting a turning tool with its cutting edge in a plane to machine the outer periphery of a workpiece at least at the beginning of the work stroke with the tool support in its retracted position and for mounting an end-working tool with its cutting edge in said plane and at least a shank portion of the end-working tool extending parallel to the axis of the rotatable member for a distance at least approximately equal to the length of the maximum work stroke of said tool support whereby said end working tool is adapted to machine the workpiece inwardly from the outer end thereof for substantially the full length of the maximum work stroke as the tool support is moved through its work stroke, and said driven means comprising means for moving said tool support relative to said carrier in a direction substantially parallel to the axis of said rotatable member in different length work strokes. 
     
     
       6. A machine tool as defined in claim 5 wherein said means supporting said carrier comprises means for supporting said carrier for movement through a path projecting through said axis of rotation of said member. 
     
     
       7. A machine tool as defined in claim 5 wherein said outer end of said rotatable member is disposed adjacent one side of said frame and said tool support projects outwardly from said carrier outwardly of said one side of said frame. 
     
     
       8. A machine tool as defined in claim 2 wherein said tool support comprises a plurality of tool supporting surfaces arranged about said indexing axis and extending generally parallel to the axis of said rotation of said rotatable member, and said means for mounting a turning tool and an end working tool on each of said surfaces mounts the tools at positions displaced from each other approximately the distance of said maximum work storke and with the cutting edges thereof in substantially the same plane transversely of said axis of rotation. 
     
     
       9. A machine tool as defined in claim 8 wherein said carrier comprises a bearing means and said support comprises a portion mounted within said bearing means for indexing movement and for axial movement in said work stroke. 
     
     
       10. A machine tool as defined in claim 8 wherein said means supporting said carrier comprises means for supporting said carrier to move said tool support in a plane containing said axis of rotation of said member and said indexing axis.  .[.11. A machine tool as defined in claim 8 wherein said carrier comprises a bearing means and said support comprises a portion mounted within said bearing means for indexing movement and for axial movement in said work stroke..]. .[.12. A machine tool as defined in claim 11 wherein said means supporting said carrier comprises means supporting said carrier for movement in a path projecting through said axis of rotation..].   .[.13. A machine tool as defined as in claim 11 wherein said outer end of said rotatable member is disposed adjacent one side of same frame and said tool support projects outwardly from said 
     
     
        carrier outwardly of said one side of said frame..]. 14. A machine tool as defined in claim 1 wherein said way extends parallel to a line perpendicular to and intersecting the axis of said rotatable member and supporting said carrier for movement along a path projecting through said 
     
     
        axis of rotation. 15. A machine tool as defined in claim 14 wherein said way is disposed inwardly of the plane of said outer end of said rotatable 
     
     
        member. 16. A machine tool as defined in claim 1 wherein said outer end of said rotatable member is disposed adjacent one side of said frame and said tool support projects outwardly from said carrier outwardly of said one 
     
     
        side of said frame. 17. A machine tool as defined in claim 4 wherein said way is disposed adjacent said outer end of said rotatable member and said means supporting said carrier further comprising a second way extending transversely of said axis of rotation and which is disposed on said frame inwardly of said outer end of said rotatable member, said frame having a side extending transversely of said axis of rotation adjacent said outer end of said rotatable member and said tool .[.turret.]. .Iadd.support .Iaddend.projecting outwardly from said carrier beyond said side. .Iadd. 18. A machine tool comprising a frame, a rotatable member having an axis of rotation and having an outer end for supporting a workpiece to be machined for rotation with said member about said axis, an indexible tool turret displaced to one side of said axis and comprising means for mounting tools on said turret in a plurality of angular positions about an indexing axis parallel to said axis of rotation, a carrier, turret support means supported by said carrier and projecting outwardly of said carrier for supporting said turret for indexing movement relative to said carrier to index said tools to a position for machining a workpiece and providing for advance movement of said turret relative to said carrier in a work stroke parallel to said axis of rotation to effect the machining of said workpiece and for return movement, said turret support means projecting outwardly of said carrier in a direction parallel to said axis of rotation to a retracted position and movable toward said carrier from said retracted position to a maximum advanced position, which positions define the maximum work stroke of said turret, means supporting said carrier for movement toward and away from said axis to move a tool on said turret transversely of said axis of rotation, said means supporting said carrier being disposed on said frame alongside said rotatable member and comprising a way extending transversely to said axis of rotation and alongside said rotatable member, and power means for effecting indexing movement of said turret for indexing the latter and for moving it through its work stroke comprising means for moving said turret through different length work strokes during machining operations. .Iaddend..Iadd. 19. A machine tool as defined in claim 18 wherein said turret has a length measured along said indexing axis which is at least as great as the distance of the maximum work stroke of said turret to support an end-working tool for machining the workpiece for substantially the work stroke of the turret and said means for mounting tools on said turret comprises means for mounting turning tools and end-working tools on said turret at spaced apart locations along said indexing axis whereby the cutting edges thereof may be positioned in a common plane extending transversely of said axis of rotation. .Iaddend. .Iadd. 20. A machine tool comprising a frame, a rotatable member having an axis of rotation and having an outer end for supporting a workpiece to be machined for rotation with said member about said axis, an indexible tool turret displaced to one side of said axis and comprising means for mounting tools on said turret in a plurality of angular positions about an indexing axis parallel to said axis of rotation, a carrier, turret support means supported by said carrier and projecting outwardly of said carrier for supporting said turret for indexing movement relative to said carrier to index said tools to a position for machining a workpiece and for providing for advance movement of said turret relative to said carrier in a work stroke parallel to said axis of rotation to effect the machining of said workpiece and for return movement, said turret support means projecting outwardly of said carrier in a direction parallel to said axis of rotation, said turret having a maximum retracted position away from the spindle and movable toward said spindle from said retracted position to a maximum advanced position, which positions define the maximum work stroke of said turret, means supporting said carrier on said frame for movement toward and away from said axis of rotation to move a tool on said turret transversely of said axis of rotation, and power means for effecting indexing movement of said turret for indexing the latter and for moving it through its work stroke comprising means for moving said turret through different length work strokes during machining operations, said turret having an axial length which is at least approximately equal to the distance of the maximum work stroke of said turret for supporting an end-working tool for effecting machining of the workpiece for substantially the maximum work stroke of the turret and for supporting a turning tool for effecting machining of the workpiece for substantially the maximum work stroke of the turret and said means for mounting tools on said turret comprising means for mounting turning tools and end-working tools on said turret at spaced apart locations along said indexing axis whereby the cutting edges of the tools may be positioned in a common plane extending transversely of said axis of rotation to effect machining by the respective tools for substantially the maximum work stroke of said turret. .Iaddend. .Iadd. 21. A machine tool as defined in claim 18 wherein said carrier comprises a bearing means and said turret support means comprises a portion mounted within said bearing means for indexing movement and for axial movement in said work stroke. .Iaddend..Iadd. 22. A machine tool as defined in claim 18 wherein said means supporting said carrier comprises means supporting said carrier for movement in a path projecting through said axis of rotation. .Iaddend..Iadd. 23. A machine tool as defined in claim 18 wherein said outer end of said rotatable member is disposed adjacent one side of said frame and said turret support means projects outwardly from said carrier outwardly of said one side of said frame. .Iaddend.