Tooth forming tools
AssigneeEx-Cell-O Corporation
InventorGeorge Mickas
Life of this patent
Estimating the term…
Abstract
Tools for pressure forming teeth on the periphery of a cylindrical workpiece, the tools having an improved tooth generating configuration which increases the effective rolling length of machines which have been and are presently being utilized to pressure form teeth on the periphery of cylindrical workpieces and which enables the pressure forming of many gears and other toothed parts which could not be pressure formed heretofore due to limitations in the length of tools that can be accommodated in such machines.
Claims20
A set of tools for pressure forming teeth on the periphery of a cylindrical workpiece, said set being comprised of a pair of elongate racks each having a leading end and a trailing end and each being provided with a working face having a plurality of teeth thereon each having a pitch line, a first section of said teeth on one of said racks being disposed between said leading end and said trailing end of said one rack, each of said teeth in said first section having a configuration conjugate to the configuration of the teeth to be formed on the workpiece, said one rack having second and third sections of teeth disposed between said first section of teeth and said leading end of said one rack, the teeth in said second section having a pitch line parallel to the pitch line of the teeth in said first section, the tops of the teeth in said second section sloping toward said leading end of said one rack, the pitch line and the tops of the teeth in said third section sloping toward said leading end of said one rack, said one rack also having a fourth section of teeth disposed between said first section of teeth and said trailing end of said one rack, the pitch line and the tops of the teeth in said fourth section sloping toward said trailing end of said one rack, the other of said racks having fifth and sixth sections of teeth, the teeth in said fifth section having a pitch line parallel to the pitch line of the teeth in said first section, the tops of the teeth in said fifth section sloping toward the leading end of said other rack, the pitch line and the tops of the teeth in said sixth section sloping toward the trailing end of said other rack.
A set of tools for pressure forming teeth on the periphery of a cylindrical workpiece, said set being comprised of a pair of elongate racks disposed in parallel relationship and each having a leading end and a trailing end, the leading end of one of said racks being disposed adjacent the trailing end of the other of said racks, each of said racks being provided with a working face having a plurality of teeth thereon each having a pitch line, a first section of teeth on said one rack being disposed between said leading end and said trailing end of said one rack, each of said teeth in said first section having a configuration conjugate to the configuration of the teeth to be formed on the workpiece and having a linear pitch line, said one rack having second and third sections of teeth disposed between said first section of teeth and said leading end of said one rack and a fourth section of teeth disposed between said first section of teeth and said trailing end of said one rack, the teeth in said second section having a linear pitch line aligned with the pitch line of the teeth in said first section, the tops of the teeth in said second section sloping toward said leading end of said one rack, the pitch line and the tops of the teeth in said third section sloping toward said leading end of said one rack, the pitch line and the tops of the teeth in said fourth section sloping toward said trailing end of said one rack, the other of said racks having fifth and sixth sections of teeth, the teeth in said fifth section having a linear pitch line coplanar with the pitch line of the teeth in said first and second sections, and the tops of the teeth in said fifth section sloping toward said leading end of said other rack, the tops of the teeth and the pitch line of the teeth in said sixth section sloping toward said trailing end of said other rack.
A set of tools for pressure forming teeth on the periphery of a cylindrical workpiece, said set being comprised of a pair of elongate racks disposed in parallel relationship, each of said racks having a leading end and a trailing end, the leading end of one of said racks being disposed adjacent the trailing end of the other of said racks, each of said racks being provided with a working face having a plurality of teeth thereon each having a pitch line, a first section of teeth on said one rack being disposed between said leading end and said trailing end of said one rack and being fully conjugate to the teeth to be formed on the workpiece and having a horizontal pitch line, said one rack having second and third sections of teeth disposed between said first section of teeth and said leading end of said one rack, the addenda of said second section of teeth successively decreasing in height with respect to the height of the addenda of the teeth in said first section, the teeth in said second section having a horizontal pitch line, the tops of the teeth and the pitch line of the teeth in said third section sloping toward said leading end of said one rack, said one rack also including a fourth section of teeth, the tops of the teeth and the pitch line of the teeth in said fourth section sloping toward said trailing end of said one rack, the other of said racks having fifth and sixth sections of teeth, the teeth in said fifth section having a horizontal pitch line and the addenda of the teeth in said fifth section successively decreasing in height with respect to the height of the addenda of the teeth in said second section and sloping toward said leading end of said other rack, the tops of the teeth and the pitch line of the teeth in said sixth section sloping toward the trailing end of said other rack.
Dependencies are inferred from the claim text.