Method for resharpening cutting blades for gear cutting machinery

A method of grinding which includes steps of establishing precise positioning of a plurality of cutting tools relative to a grinding plane of a grinding wheel to thereby sharpen (a) a topland surface, (b) a first side relief surface, and (c) a second side relief surface on said plurality of cutting tools, comprising

• mounting said cutting blades in a serial arrangement in a circular holder which allows selected corresponding surfaces of the cutting blades to be sharpened as the cutting blades and grinding wheel are relatively advanced, said mounting arrangement being such that all of the cutting blades are carried in positions which are correspondingly the same relative to a reference plane that is common to all cutting blades,
• spinning said holder relative to said grinding wheel, said spinning taking place in a reference plane which is parallel to reference sides of said cutting blades, said reference plane being positioned to intersect a reference axis about which each blade is swung during a grinding operation, said positioning being such that the reference axis is located at a set radial distance from one corner of the topland surface and an adjacent side relief surface of a cutting blade in a grinding position relative to the grinding plane of the grinding wheel,
• relatively advancing the cutting blades and the grinding wheel to form a topland surface and a first side relief surface on each of the cutting blades,
• turning over all of the cutting blades, and
• relatively advancing the cutting blades and the grinding wheel to form a second side relief surface on each of the cutting blades.