Abstract: A machine tool, such as an internal grinding machine, includes a tool quill exchanging mechanism having an indexable tool quill storage magazine for positioning a replacement tool quill at a pick-up position, a worn or used tool quill discharge mechanism having a tool quill pick-off cam plate and discharge chute in spaced juxtaposition to the tool quill pick-up position. A pivotal tool quill exchange arm includes first and second tool quill stations for releasably retaining a worn or used tool quill and replacement tool quill, respectively, and is pivotal to first and second tool quill exchange positions. At the first tool quill exchange position relative to the tool quill storage magazine and discharge means, a worn or used tool quill is removed from the first tool quill station by the pick-off means and falls into a discharge chute and generally concurrently the second tool quill station removes a new tool quill from the pick-up position and releasably grips same.

Abstract: A grinding machine is provided with a workhead support means having pivotable shaft means on which the support means is pivoted by a servomotor/pinion arrangement controlled by a programmable controller and a position indicating means on the pivotable shaft means that inputs angular shaft position signals to the controller. Adaptive control components may also be included in the control arrangement. The workhead support means is thereby pivotable to vary the angular relationship of the workpart axis to the grinding wheel axis to effect a desired taper or contour grind or to compensate for changes in grinding parameters causing out of tolerance ground workparts. Special releasable clamps are provided to fix a desired position of the workhead support means and yet release same for pivoting movement. Fluid lift mechanisms are also provided to reduce friction between the workhead support means and the adjacent machine base member during pivoting.

Abstract: An interchangeable and stationary grinding wheel dressing structure mounted on a cantilevered base unit having the grinding wheel carried to it for dressing.

Abstract: A grinding machine having a fixed wheelhead and a biaxially movable workslide. The workslide is mounted on a cylindrical slidebar for axial sliding motion as well as pivotal motion around the bar. A dresser assembly is also mounted pivotally on the slidebar for selective dressing operations. The workslide may be moved axially into an overlapping relationship with the dresser such that the workslide is carried with the dresser over a range of pivotal displacement thereof. An hydraulic cylinder is used to pivot the dresser and a precisely positionable stop is used to control all lateral feed motions. Axial speed is programmed by a control valve. The dresser is pivotal on its base to produce a true circle wheel profile.

Abstract: A grinding machine having a fixed wheelhead and a biaxially movable workslide. The workslide is mounted on a cylindrical slidebar for axial sliding motion as well as pivotal motion around the bar. A dresser assembly is also mounted pivotally on the slidebar for selective dressing operations. The workslide may be moved axially into an overlapping relationship with the dresser such that the workslide is carried with the dresser over a range of pivotal displacement thereof. An hydraulic cylinder is used to pivot the dresser and a precisely positionable stop is used to control all lateral feed motions. Axial speed is programmed by a control valve. The dresser is pivotal on its base to produce a true circle wheel profile.