Apparatus for grinding

An arrangement for relief grinding and polygonal grinding on grinding machines, comprising:

• a machine housing;
• a grinding disk on said machine housing for grinding a workpiece, said grinding disk having a disk axis;
• a workpiece spindle shaft with axis parallel to said grinding disk axis, said workpiece spindle shaft mounting the workpiece;
• a journal body, with a pivot axis in said housing, mounting the spindle shaft and an articulated lever mounted on said journal body, said lever having a free end;
• cam means actuating said lever to generate an articulated movement for controlling oscillating engagement of the workpiece with said grinding disk;
• means for converting said articulated movement of said lever into a linear movement of the lever lengthwise of the longitudinal axis thereof, said lever engaging said journal body at a predetermined distance from said journal body pivot axis, said means for converting said articulated movement of said lever into a linear movement of the lever comprising sliding means having two mutually adjustable glideface elements, one of said elements being mounted on said machine housing and the other one of said elements being mounted on the free end of said lever.