Grinding machine for grinding a helical groove in a workpiece of tapering axial section
OwnerMaurice M. Wardinventor
Life of this patent
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Abstract
A grinding machine for grinding a helical groove in a workpiece of tapering axial section, to give a conical cutter, has means for rotating the workpiece at a varying rate as it is advanced towards the grinding wheel. The rotating means includes a pinion in the workhead engaging with a rack extending across the machine. The rack is connected to a slide lockable in position along a pivotal arm, so that the end of the rack follows a circular path as the workpiece is advanced.
Claims17
A grinding machine for grinding a helical groove in a workpiece of tapering axial section, comprising a rotatable spindle for mounting the workpiece for rotation about its axis, means for supporting a rotary grinding wheel to grind said groove, means for effecting rectilinear translation of said spindle with respect to said grinding wheel, and means for rotating the spindle concurrently with said rectilinear translation, said rotating means comprising a driving member operatively connected between said spindle and a point on a pivotally mounted arm, said point being constrained to move in an arcuate path having a predetermined radius, said driving member having a component of movement in a direction providing for rotation of said spindle, said arm being in the form of a slideway on which is mounted a slide lockable in desired radial positions, the driving member being secured to the slide, and said arm being arranged to rotate about its pivotal axis concurrently with said rectilinear translation.
A grinding machine for grinding a helical groove in a workpiece of tapering axial section comprising:
- grinding means;
- a rotatable spindle for mounting the workpiece for rotation about the axis of the workpiece;
- means for effecting rectilinear translation of the spindle with respect to said grinding means;
- drive means operatively connected to the spindle and capable of movement in a direction to provide for rotation of the spindle;
- means for moving said drive means to provide for concurrent rectilinear translation and rotation of the spindle to allow the grinding means to form a helical groove in the workpiece;
- and
- wherein said means for moving said drive means comprises a pivotally mounted arm, and said drive means comprises an elongated cross-bar drivingly engaged with the spindle to provide for rotation of the spindle when the cross-bar is moved with respect to the spindle, the cross-bar being pivotally mounted to the arm at a point, said point being constrained to move in a circular path.
Dependencies are inferred from the claim text.