EP 2131972 B1 20100623 - METHOD FOR THE PRODUCTION OF A HIGH-PRESSURE ACCUMULATOR PIPE MADE OF STEEL FOR FUEL INJECTION SYSTEMS AND HIGH-PRESSURE ACCUMULATOR PIPE PRODUCED ACCORDING TO THIS METHOD
Title (en)
METHOD FOR THE PRODUCTION OF A HIGH-PRESSURE ACCUMULATOR PIPE MADE OF STEEL FOR FUEL INJECTION SYSTEMS AND HIGH-PRESSURE ACCUMULATOR PIPE PRODUCED ACCORDING TO THIS METHOD
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES HOCHDRUCKSPEICHERROHRES AUS STAHL FÜR KRAFTSTOFFEINSPRITZANLAGEN SOWIE MIT DIESEM VERFAHREN HERGESTELLTES HOCHDRUCKSPEICHERROHR
Title (fr)
PROCÉDÉ DE FABRICATION D'UN TUBE ACCUMULATEUR DE HAUTE PRESSION EN ACIER POUR DES SYSTÈMES D'INJECTION DE CARBURANT ET TUBE ACCUMULATEUR DE HAUTE PRESSION
Publication
Application
Priority
- DE 2008000041 W 20080110
- DE 102007011868 A 20070307
Abstract (en)
[origin: US2011041946A1] In a method of making a high-pressure accumulator pipe as composite pipe of steel for pressures of up to 1800 bar and above with high static strength and fatigue strength for fuel injection systems with common rail systems for internal combustion engines, a first inner pipe part is inserted into a second outer pipe part with little clearance, and the inner pipe part is connected to the outer pipe part gap-free and by interference fit through mechanical forming. The mechanical forming includes a rolling-in process, wherein the inner pipe part is subjected to a ductile expansion and the outer pipe part is subjected to an elastic expansion using an oversized rolling tool that is moved within the inner pipe part, and wherein a residual compressive stress adjusted to the operating pressure is applied to the inner pipe part after the forming process via the elastic resilience of the outer pipe part.
IPC 8 full level
B21C 37/15 (2006.01); B21D 39/06 (2006.01); F02M 55/02 (2006.01)
CPC (source: EP US)
B21C 37/154 (2013.01 - EP US); B21D 39/06 (2013.01 - EP US); B21K 25/00 (2013.01 - EP US); F02M 55/025 (2013.01 - EP US); F02M 2200/80 (2013.01 - EP US); F02M 2200/9053 (2013.01 - EP US); Y10T 29/49911 (2015.01 - EP US); Y10T 29/49927 (2015.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
US 2011041946 A1 20110224; US 8918982 B2 20141230; AT E471770 T1 20100715; CA 2678752 A1 20080912; CA 2678752 C 20151020; DE 102007011868 B3 20080904; DE 502008000844 D1 20100805; EP 2131972 A1 20091216; EP 2131972 B1 20100623; JP 2010520403 A 20100610; JP 5525824 B2 20140618; WO 2008106911 A1 20080912
DOCDB simple family (application)
US 52816808 A 20080110; AT 08706742 T 20080110; CA 2678752 A 20080110; DE 102007011868 A 20070307; DE 2008000041 W 20080110; DE 502008000844 T 20080110; EP 08706742 A 20080110; JP 2009552053 A 20080110