Method of grinding gear teeth flanks

A method of grinding tooth flanks upon a gear grinding machine comprising a workpiece support and a tool base relatively movable with respect to one another, a grinding wheel support pivotably mounted at the tool base for pivotal movement about a pivot axis, a grinding wheel mounted to be rotatably drivable at said grinding wheel support, said grinding wheel having an axis of rotation arranged transversely with respect to said pivot axis, pivot drive means for connecting said grinding wheel support with said tool base, said pivot drive means enabling, during grinding of a tooth flank, random changes of the grinding-angle of attack between the grinding wheel and the tooth flank within predetermined limits, which method comprises the steps of:

• simulating the to-and-fro generating movements between the tooth flank and the grinding wheel by pivoting the grinding wheel back-and-forth about the pivot axis, said pivot axis extending approximately through the point of intersection of two tangents at the base circle of the gear teeth to be ground;
• one of the tangents extending through the tooth tip point and the other tangent through the tooth base point of the tooth profile;
• and
• varying the spacing of the pivot axis from a work point of the grinding wheel during the pivotal movement in order to obtain the desired tooth profile.

A method of grinding tooth flanks upon a gear grinding machine comprising the steps of:

• providing a grinding wheel affording random changes of the grinding-angle of attack between the grinding wheel and the tooth flank within predetermined limits;
• increasing the grinding-angle of attack along the path from the tooth root to the intermediate region of the tooth flank;
• and
• increasing the grinding-angle of attack also along the path from the tooth head to the intermediate region of the tooth flank and at that location said grinding-angle of attack reaches its maximum.

A method of grinding tooth flanks upon a gear grinding machine comprising the steps of:

• providing a grinding wheel pivotable about a pivot axis and enabling, during grinding of a tooth flank, random changes of the grinding-angle of attack between the grinding wheel and the tooth flank within predetermined limits;
• simulating to-and-fro generating movements between the tooth flank and the grinding wheel by moving the grinding wheel back-and-forth about the pivot axis, said pivot axis extending approximately through the point of intersection of two tangents at the base circle of the gear teeth to be ground;
• one of the tangents extending through the tooth tip point and the other tangent through the tooth base point of the tooth profile;
• and
• varying the spacing of the pivot axis from a work point of the grinding wheel during the pivotal movement in order to obtain the desired tooth profile.