Patent ID: 8978251
Filing Date: 2015-03-17
Classification: F17C,Y10T

Abstract:
1. A method for manufacturing a compressed air tank for utility vehicles, in particular for air suspensions of utility vehicles, said method comprising the steps of: (a) forming a tubular or cylindrical casing having a pair of end faces; (b) forming at least two bases by drawing or stamping, at least one of said bases and/or said casing, having a bore peripherally surrounded by an exterior surface; (c) laser welding one of said bases to a first one of said pair of end faces of said casing and, laser welding another one of said bases to a second one of said pair of end faces; (d) providing a sleeve having an opening which passes through said sleeve and having an external peripheral wall located around said opening, said peripheral wall having an indentation, a chamfer or a groove; said indentation, said chamfer or said groove forming a burr or an annular projection; (e) arranging said sleeve in said bore such that said burr or said annular projection of said sleeve is adjacent said exterior surface, and; (f) circumferentially laser welding said sleeve circumferentially to said exterior surface by directing a laser beam to fuse said burr or said annular projection, to said exterior surface.