Patent ID: 7152321

Claim:
A method of producing a gas generator housing part of a thin-walled tube ( 22 , 24 ) and a connecting piece laterally mounted thereto, characterized by the following steps: a) providing a tube ( 22 , 24 ) having a wall thickness (WS) which amounts to a maximum of 10% of a tube external diameter (D) and a minimum tensile strength which amounts to at least approximately 800 N/mm 2 . b) providing a connecting piece having an external diameter (do) which amounts to between 15% and 40% of said tube external diameter (D); c) aligning said connecting piece radially to said tube ( 22 , 24 ) such that an end face ( 78 ) of said connecting piece faces an outer face of said tube ( 22 , 24 ); d) joining said tube ( 22 , 24 ) and said connecting piece by friction welding, by producing a relative rotation between said tube ( 22 , 24 ) and said connecting piece and moving said tube ( 22 , 24 ) and said connecting piece towards each other, e) providing a maximum welding time amounting to less than 1 sec, and f) providing a friction depth (h) amounting to less than 80% of said wall thickness (WS) of said tube ( 22 , 24 ).