Method of and means for grinding pairs of gear wheels as spiral or curved toothed bevel gear wheels

Device for use in grinding pairs of at least one of spiral and curved tooth bevel gears, the apparatus comprising a cup grinding wheel mounted for rotation about a grinding axis, the cup grinding wheel having two rectilinear grinding flanks that are linear in cross section and inclined relative to each other to form a tool with a conical ring, and means for applying a slight eccentric cyclic motion to the cup grinding wheel during a grinding operation, comprising a means for producing a kinematic effect equivalent to a rod of specific length borne so as to be pivotable about a rod axis that is fixed relative to the apparatus and rotatably drivable at one end, while at the other end of the rod there is a kinematic equivalent of a pivot arm of specific pivot length that is borne so as to be pivotable about a pivot axis, and is rotatably drivable, and in that a grinding axis of said grinding wheel passes through the free end of the pivot arm kinematic equivalent and in that the angular velocity of the pivot arm kinematic equivalent with respect to the means producing the rod kinematic equivalent is opposed to and twice as great as the angular velocity of the rod with respect to the device.

A process for the grinding of pairs of at least one of spiral and curved tooth bevel gears using a method of gear generation, the process comprising the steps of producing teeth on each of the gears of the pairs by simultaneous grinding of respective pairs of flanks of the gear teeth by means of a cup grinding wheel having two rectilinear grinding flanks that are linear in cross section and inclined relative to each other to form a tool with one of conical inner and outer rings, and imparting an additional slight elliptical cyclic motion to the cup grinding wheel during said grinding of the flanks of the gear teeth.

A process for the grinding of pairs of at least one of spiral and curved tooth bevel gears using a method of gear generation, the process comprising the steps of producing the teeth of one of the bevel gears by simultaneously grinding the flanks located on either side of a tooth gap defining facing sides of adjacent teeth by means of a cup grinding wheel having two outwardly facing grinding flanks facing away from each other for forming a conical outer ring, producing the teeth of the other bevel gear by simultaneous grinding of the flanks located opposite sides of a tooth by means of a cup grinding wheel having two grinding flanks facing one another for forming a conical inner ring, and, imparting an additional slight eccentric cyclic motion to at least one of the cup grinding wheels during the grinding operation, wherein the additional slight eccentric motion is applied to the grinding wheel for producing the other gear, and wherein the grinding wheels are complementarily shaped, but vary from congruety by an amount equal to an amount of said additional eccentric motion that is effective in the direction of the tooth normal.