US 4,954,028 AGranted

Process for making, finishing crown wheels

AssigneeHankamp B.V.

InventorsJan M. Seroo, Martinus H. Cuypers, Anthonius J. H. M. Oude Maatman

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Abstract

A process for the making and/or finishing of a crown wheel using a metal-cutting tool, the crown wheel being intended for meshing with a predetermined cylindrical gear. The metal-cutting tool is a rotary disc-type element whose working transverse section lying in the plane of the axis of rotation corresponds essentially to the tooth profile of the cylindrical gear. The disc-type element is placed in such a way relative to the crown wheel to be made that the tooth profile of the element coincides with the tooth profile of the cylindrical gear when it is engaged with the crown wheel. The disc-type element is put into a to and fro linear motion perpendicular to its axis of rotation and is at the same time tilted about an axis which coincides with the axis of rotation of the cylindrical gear when it is engaged with the crown wheel. The tooth profile of the element meshes with the crown wheel to be made and finishes the tooth flanks according to the generating principle.

Claims12

Dependent claims

A method of using a disc-type element to make and/or finish a crown wheel, said crown wheel being intended for mating and meshing with a predetermined cylindrical gear, said disc-type element being rotatable about a first axis of rotation, said disc-type element having a peripheral working section, the cross-sectional profile of said working section of said disc-type element corresponding substantially to the tooth profile of the cylindrical gear, the diameter of said disc-type element being considerably larger than the diameter of the cylindrical gear, the method comprising the steps of:

positioning said disc-type element relative to said crown wheel such that said working section of said disc-type element is disposed in a position to work a longitudinal tooth space of said crown wheel;
working said tooth space by rotating said disc-type element about said first axis;
tilting said disc-type element about a second axis of rotation, said second axis being perpendicular to said first axis and parallel to said longitudinal tooth space, said second axis coinciding with the axis of rotation of the cylindrical gear;
rotating said crown wheel during the step of tilting said disc-type element such that the ratio of the angular velocity of said tilting of said disc-type element to the angular velocity of said rotating of said crown wheel equals the transmission ratio between the cylindrical gear and said crown wheel.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 07/314,543Filed 23 Feb 1989
Priority: NL 880047224 Feb 1988
Granted: 4 Sep 1990
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B23F 5/02
Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear…:…
B23F 15/06
Methods or machines for making gear wheels of special kinds not covered by groups B23F7/00 - B23F13/00: making gear teeth on the front surface of…
B23F 21/02
Tools specially adapted for use in machines for manufacturing gear teeth: grinding discs; Grinding worms
B23F 23/003
Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines: generating mechanisms