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

摘要

#CMT# #/CMT# A first inner tubular part (2) inserts into a second outer tubular part (1) with little play. The inner tubular part links to the outer tubular part through mechanical reshaping with no gaps and in a non-positive manner. The mechanical reshaping consists of a roll-in process. By using a rolling tool fitted with an overdimension and moving in the inner tubular part, the inner tubular part undergoes a plastic expansion and the outer tubular part undergoes an elastic expansion. #CMT# : #/CMT# An independent claim is also included for a high-pressure storage tube as a composite tube up to pressures of 1,800 bar for fuel injection in common-rail systems. #CMT#USE : #/CMT# For a high-pressure storage tube as a composite tube up to pressures of 1,800 bar for fuel injection in common-rail systems in internal combustion engines. #CMT#ADVANTAGE : #/CMT# This method gives high static stability and fatigue/endurance limit for fuel injection in common-rail systems in internal combustion engines. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a cross-sectional diagram of a high-pressure storage tube as a composite tube up to pressures of 1,800 bar for fuel injection in common-rail systems. 1 : Outer tubular part 2 : Inner tubular part 3 : Radial drilled hole 4 : Pressure-pipe connection 5 : Sealing plug.