EP 3752302 A1 20201223 - THIN-WALLED RING GEARS HAVING INNER AND OUTER TOOTHING, AND A DEVICE AND METHOD FOR PRODUCING SAME
Title (en)
THIN-WALLED RING GEARS HAVING INNER AND OUTER TOOTHING, AND A DEVICE AND METHOD FOR PRODUCING SAME
Title (de)
DÜNNWANDIGE HOHLRÄDER MIT INNEN- UND AUSSENVERZAHNUNG SOWIE VORRICHTUNG UND VERFAHREN ZU DEREN HERSTELLUNG
Title (fr)
COURONNES À PAROIS MINCES COMPORTANT UNE DENTURE INTÉRIEURE ET UNE DENTURE EXTÉRIEURE, AINSI QUE DISPOSITIF ET PROCÉDÉ DE PRODUCTION CORRESPONDANTS
Publication
Application
Priority
- CH 1932018 A 20180216
- EP 2019053712 W 20190214
Abstract (en)
[origin: WO2019158656A1] The invention relates to a method for producing a ring gear which has inner toothing and outer toothing, the inner toothing being toothing for driving a pinion. In the method, a workpiece (1) is machined by a stamping tool (2). The workpiece (1) has a tubular section (3) with a longitudinal axis (Z) and a first stabilisation section (4) for stabilising the shape of the tubular section (3) during machining. The tubular section (3) is inserted into a die (5) which has inner die toothing (5z). The workpiece (1) is then machined on the inside by the stamping tool (2) to produce the inner toothing and the outer toothing simultaneously, in that the workpiece executes a rotational movement at a time-variable rotation speed, and the stamping tool (2) executes radially oscillating movements which are synchronised with said rotational movement. In the process, the stamping tool (2) shapes the tubular section (3) to produce the outer toothing while at the same time producing the inner toothing by repeated hammering of the tubular section (3) into the die toothing (5z).
IPC 8 full level
B21H 5/02 (2006.01); B21D 53/28 (2006.01)
CPC (source: CH EP KR US)
B21D 22/025 (2013.01 - KR); B21D 53/28 (2013.01 - CH KR US); B21H 5/02 (2013.01 - CH EP); B21H 5/025 (2013.01 - EP KR); B21K 1/30 (2013.01 - CH US); B21D 53/28 (2013.01 - EP); Y10T 29/49462 (2015.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2019158656 A1 20190822; CH 714660 A1 20190830; CN 111727091 A 20200929; CN 111727091 B 20221004; EP 3752302 A1 20201223; EP 3752302 B1 20230726; JP 2021514307 A 20210610; JP 7324762 B2 20230810; KR 102674695 B1 20240612; KR 20200119822 A 20201020; TW 201936290 A 20190916; TW I791091 B 20230201; US 11498114 B2 20221115; US 2021054917 A1 20210225
DOCDB simple family (application)
EP 2019053712 W 20190214; CH 1932018 A 20180216; CN 201980013458 A 20190214; EP 19705746 A 20190214; JP 2020543502 A 20190214; KR 20207023869 A 20190214; TW 108104765 A 20190213; US 201916969585 A 20190214