EP 1379709 B1 20050601 - METHOD FOR PREVENTING PRESS FIT DAMAGES TO WHEELSETS, PARTICULARLY TO WHEELSETS OF RAIL VEHICLES
Title (en)
METHOD FOR PREVENTING PRESS FIT DAMAGES TO WHEELSETS, PARTICULARLY TO WHEELSETS OF RAIL VEHICLES
Title (de)
VERFAHREN ZUR VERMEIDUNG VON PRESSSITZSCHÄDEN AN RADSÄTZEN, INSBESONDERE AN RADSÄTZEN VON SCHIENENFAHRZEUGEN
Title (fr)
PROCEDE DESTINE A EVITER DES DEGATS D'AJUSTEMENT FORCE SUR DES ESSIEUX MONTES, NOTAMMENT SUR DES ESSIEUX MONTES DE VEHICULES SUR RAILS
Publication
Application
Priority
- DE 10119309 A 20010419
- EP 0202837 W 20020314
Abstract (en)
[origin: WO02086182A1] The invention relates to a method for preventing press fit damages to wheelsets, particularly to wheelsets of rail vehicles. To this end, the surface of a wheelset shaft is treated before subsequently joining of the wheelset. The aim of the invention is to develop a method, which cost-effectively protects the wheel seats from press damages by means of a special surface treatment, which is adapted to current maintenance technologies, and which avoids structural changes to existing wheelset designs. To this end, the invention provides that, first of all in at least one step, the wheelset shaft is longitudinally turned or longitudinal ground in its cylindrical and conical end area, and the resulting transition is smoothed and/or rounded whereby subsequently treating the surface of the wheelset shaft using a plasma ion implantation method. During this treatment, a finely distributed powder that reduces coefficients of friction, especially a powder containing sulfide, is applied to the rotating wheelset shaft under atmospheric pressure while using a cold plasma that contains reactive gas serving as a carrier gas. The powder is applied in such a manner as to construct, on the nanometer and/or micrometer scale, a very hard metallic slide layer having a low adhesiveness. In the event of the highest contact pressures between the wheelset shaft and the wheel, a solid lubrication, which prevents press damages, is produced immediately after the lubricant film has been ruptured.
IPC 1-7
IPC 8 full level
B61F 15/00 (2006.01); B61F 15/20 (2006.01); C23C 4/12 (2006.01); C23C 4/134 (2016.01); C23C 24/04 (2006.01); F16C 33/14 (2006.01)
CPC (source: EP)
B61F 15/20 (2013.01); C23C 4/134 (2016.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 02086182 A1 20021031; AT E296906 T1 20050615; CZ 20032851 A3 20040414; CZ 305025 B6 20150401; DE 10119309 C1 20030206; DE 50203281 D1 20050707; EP 1379709 A1 20040114; EP 1379709 B1 20050601; ES 2240699 T3 20051016
DOCDB simple family (application)
EP 0202837 W 20020314; AT 02704757 T 20020314; CZ 20032851 A 20020314; DE 10119309 A 20010419; DE 50203281 T 20020314; EP 02704757 A 20020314; ES 02704757 T 20020314