EP 1171640 A2 20020116 - METHOD AND DEVICE FOR HARDENING SURFACES OF A CRANKSHAFT OR CAMSHAFT
Title (en)
METHOD AND DEVICE FOR HARDENING SURFACES OF A CRANKSHAFT OR CAMSHAFT
Title (de)
VERFAHREN UND VORRICHTUNG ZUM HÄRTEN VON FLÄCHEN EINER KURBEL- ODER NOCKENWELLE
Title (fr)
PROCEDE ET DISPOSITIF POUR DURCIR DES SURFACES DE VILEBREQUIN OU D'ARBRE A CAMES
Publication
Application
Priority
- DE 19917241 A 19990416
- DE 19955670 A 19991119
- EP 0003354 W 20000413
Abstract (en)
[origin: WO0063447A2] The invention relates to a method and device for hardening surfaces (10, 11, 12; 39, 40, 41) of a crankshaft (K) or camshaft (N), said surfaces being adjacently arranged in axis direction (A). According to the invention, the surfaces (10, 11, 12; 39, 40, 41) to be hardened are inductively heated by an inductor (14, 15, 16; 33, 34, 35) individually allocated thereto and are quenched after heating, whereby at least two adjacently arranged surfaces (10, 11, 12; 39, 40, 41) to be hardened are simultaneously heated. The aim of the invention is to make it possible to simultaneously harden closely adjacent surfaces while decreasing the risk of a defective hardening. To this end, the invention provides that, during simultaneous heating of the surfaces (10, 11, 12; 39, 40, 41) to be hardened, the inductor (14, 15, 16; 33, 34, 35) that is individually allocated to one of the surfaces (10, 11, 12; 39, 40, 41) is operated with a frequency (F1, F2; F3, F4) that differs from that of the inductor (10, 11, 12; 39, 40, 41) allocated to the immediately adjacent surface (10, 11, 12; 39, 40, 41) to be hardened.
IPC 1-7
IPC 8 full level
C21D 1/10 (2006.01); C21D 9/30 (2006.01); F01L 1/04 (2006.01); F16C 3/02 (2006.01); F16C 3/06 (2006.01); F16H 53/02 (2006.01)
CPC (source: EP)
C21D 1/10 (2013.01); C21D 9/30 (2013.01); Y02P 10/25 (2015.11)
Citation (search report)
See references of WO 0063447A2
Designated contracting state (EPC)
DE ES FR IE IT
DOCDB simple family (publication)
WO 0063447 A2 20001026; WO 0063447 A3 20010329; BR 0009812 A 20020319; EP 1171640 A2 20020116; JP 2002542434 A 20021210
DOCDB simple family (application)
EP 0003354 W 20000413; BR 0009812 A 20000413; EP 00926920 A 20000413; JP 2000612522 A 20000413