Profiling apparatus for a grinding wheel in a gear grinding machine

A profiling apparatus for at least one substantially ring-shaped flank of a grinding wheel having a grinding wheel axis in a gear grinding machine, comprising:

• at least one dressing tool for dressing the substantially ring-shaped flank of the grinding wheel;
• a radial slide displaceable at substantially right angles relative to said grinding wheel axis;
• said at least one dressing tool being arranged at said radial slide;
• radial drive means for relative radial displacement between said at least one dressing tool and said grinding wheel at substantially right angles relative to said grinding wheel axis;
• a radial displacement measuring device for measuring the radial displacement of said dressing tool relative to said grinding wheel;
• said at least one dressing tool defining an operative position and a wear measuring position at said radial slide;
• means for displacing said at least one dressing tool between said operative position and said wear measuring position;
• a wear measuring device arranged at said radial slide by means of which the wear of said at least one dressing tool can be measured;
• axial drive means for relative axial displacement between said at least one dressing tool and said grinding wheel in the direction of said grinding wheel axis;
• an axial displacement measuring device for measuring the axial displacement of said at least one dressing tool relative to said grinding wheel;
• control means for coordinating said relative radial and axial displacements of said dressing tool and said grinding wheel in correspondence to a desired flank profile of said substantially ring-shaped flank of said grinding wheel;
• and
• said control means increasing said relative axial displacement of said dressing tool and said grinding wheel essentially by the amount of the wear of said at least one dressing tool.