VERFAHREN UND VORRICHTUNG FUER DAS VEREINIGEN EINES METALLROHRS MIT EINER KERBVERZAHNTEN METALLSTANGE

摘要

Herein disclosed are an improved method and apparatus for manufacturing an assembly of a hollow metal tubing and a rod having a serrated portion which is closely inserted into a reduced end portion of the tubing which has an inside diameter substantially larger than an outside diameter of the serrated portion of the rod. The rod is first loosely inserted through its serrated portion into the tubing and thereafter the reduced end portion of the tubing is radially squeezed by a swaging process so that the reduced end portion of the tubing is deformed under radial compression and closely fitted onto the serrated portion of the rod with an excess of wall of the reduced end flown into the grooves between the individual serrations of the rod. The assembly thus produced is specifically adapted to constitute a collapsible type steering column assembly which is used for the protection of a driver of a motor vehicle during a frontal collision.