EP 0718410 B1 20010328 - Process for producing rocker arms
Title (en)
Process for producing rocker arms
Title (de)
Verfahren zum Herstellen von Kipphebeln
Title (fr)
Procédé pour la fabrication de leviers oscillants
Publication
Application
Priority
- EP 94309203 A 19941209
- JP 24959593 A 19931005
Abstract (en)
[origin: EP0718410A1] In producing a rocker arm (25, 26), the following steps are used: fabricating a rocker arm blank (79) which includes: a rocker arm body (77) having an aperture (36a) therein adapted to be converted to a hole (36) for the insertion of a shaft (24), and which blank (79) is made of a nitrided steel comprising specified amounts of C, Mn, Cr, Al, Si, P, S, Cu, Ni, one of Pb and Bi, and optionally Mo, and, as the balance, substantially Fe; and a slipper surface forming piece (41); subjecting the rocker arm blank (79) to a refining treatment to adjust its hardness; subjecting the apertures (36a) to reaming to form the shaft insertion holes (36); and subjecting the rocker arm blank (79) with the shaft insertion holes (36) formed therein to a nitriding treatment. Thus, it is possible to mass-produce rocker arms (25, 26) for an internal combustion engine, each of which has excellent mechanical properties. <IMAGE>
IPC 1-7
IPC 8 full level
C21D 1/78 (2006.01); C21D 9/00 (2006.01); C22C 38/00 (2006.01); C23C 8/26 (2006.01); F01L 1/18 (2006.01); F01L 1/26 (2006.01); C21D 1/18 (2006.01)
CPC (source: EP)
C21D 1/78 (2013.01); C21D 9/0068 (2013.01); F01L 1/181 (2013.01); F01L 1/267 (2013.01); C21D 1/18 (2013.01); F01L 2303/00 (2020.05)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0718410 A1 19960626; EP 0718410 B1 20010328; JP 3411637 B2 20030603; JP H07102322 A 19950418
DOCDB simple family (application)
EP 94309203 A 19941209; JP 24959593 A 19931005