Global Patent Index - EP 1089838 A1

EP 1089838 A1 2001-04-11 - METHOD FOR PRODUCING VEHICLE WHEELS

Title (en)

METHOD FOR PRODUCING VEHICLE WHEELS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON FAHRZEUGRÄDERN

Title (fr)

PROCEDE DE PRODUCTION DE ROUES DE VEHICULES

Publication

EP 1089838 A1 (EN)

Application

EP 99930744 A

Priority

  • RU 98111967 A
  • US 9914457 W

Abstract (en)

[origin: WO9967042A1] A metal forming method is used for manufacturing vehicle wheels. The invention comprises manufacturing of a wheel block comprising a central part and initially formed rim; drawing of the rim by hot rolling to obtain a wheel profile that approximates a finished wheel, and a final wheel treatment process. The rolling is conducted from either side of the wheel block, which may comprise any granular microstructure. Rolling temperature-strain rate conditions correspond to the microstructure. For a coarse-grain microstructure, the rim includes a shoulder with a thickness greater than that of the finished wheel, and thickness differences transform the microstructure into a recrystallized and/or polygonized microstructure. For a fine-grain microstructure, the rim includes a shoulder or flange with a thickness close to a thickness of a finished wheel. For mixed microstructures, the rim includes a shoulder and has a thickness greater or equal to a finished wheel.

IPC 1-7 (main, further and additional classification)

B21H 1/10; B21D 53/30; B21K 1/38; C22F 1/04

IPC 8 full level (invention and additional information)

B21D 53/30 (2006.01); B21D 22/16 (2006.01); B21D 53/26 (2006.01); B21H 1/02 (2006.01); B21H 1/04 (2006.01); B21H 1/10 (2006.01); B21K 1/38 (2006.01); B23P 15/00 (2006.01); C21D 9/34 (2006.01); C22F 1/00 (2006.01); C22F 1/04 (2006.01); C22F 1/18 (2006.01)

CPC (invention and additional information)

B21D 22/16 (2013.01); B21D 53/264 (2013.01); B21H 1/10 (2013.01); B23P 15/00 (2013.01); C22F 1/00 (2013.01); C22F 1/04 (2013.01); C22F 1/183 (2013.01)

Citation (search report)

See references of WO 9967042A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9967042 A1 19991229; CN 1313798 A 20010919; CZ 20004861 A3 20020213; EP 1089838 A1 20010411; JP 2002518186 A 20020625; RU 2153946 C2 20000810

INPADOC legal status


2003-02-12 [18R] REFUSED

- Effective date: 20020919

2001-06-20 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010508

2001-04-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010124

2001-04-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE