US 11,772,212 B2
Method for producing an aluminum cylindrical hollow body for a vehicle transmission and a cylindrical hollow body
Christian Ruhl, Friedrichshafen (DE); Helmut Boehm, St. Ingbert (DE); and Martin Brehmer, Tettnang (DE)
Assigned to ZF Friedrichshafen AG, Friedrichshafen (DE)
Appl. No. 17/612,447
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
PCT Filed May 19, 2020, PCT No. PCT/EP2020/063981
§ 371(c)(1), (2) Date Nov. 18, 2021,
PCT Pub. No. WO2020/234306, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 102019207311.5 (DE), filed on May 20, 2019.
Prior Publication US 2022/0241908 A1, Aug. 4, 2022
Int. Cl. B23P 15/14 (2006.01); B22D 25/02 (2006.01); C22C 21/02 (2006.01); F16H 55/17 (2006.01)
CPC B23P 15/14 (2013.01) [B22D 25/02 (2013.01); B23P 2700/50 (2013.01); C22C 21/02 (2013.01); F16H 2055/176 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for producing and machining a cylindrical hollow body constructed of aluminium or an aluminium alloy and for arranging said hollow body in a motor vehicle transmission, the method comprising: providing a hollow body that is produced by a casting process such that the hollow body has an inner and an outer lateral surface and has an internal tooth system in at least one subregion of the inner lateral surface, clamping the hollow body centrally for machining, and arranging the hollow body in a vehicle transmission by the tooth flanks of the internal tooth system, wherein the clamping of the hollow body is done centrally is done on a tip circle diameter of the internal tooth system.