Connecting device between a rohrfoermigen body and a annular loop part as well as a process for the preparation of this compound

摘要

PURPOSE:To couple easily and exactly a pipe-like member and ring body parts, by providing one or more engaging parts which are engaged with the outside circumference of the tubular member, on the inside diameter part of the ring body parts, expanding the tubular member and sticking it. CONSTITUTION:A journal 1 and a cam 2 are held at a prescribed interval between a die and a punch, and thereafter, a shaft tube 3 is inserted into a hollow part. The tooth height inside diameter of engaging pieces 11, 12, 21 and 22 is made equal to or larger than the outside diameter of the shaft tube 3, and on the other hand, the inside diameter of plane parts 13, 23 which are between the engaging pieces 11, 12, 21 and 22 is made larger than virtual outside diameter size of pipe expansion of the shaft tube 3. A pressing member 4 having a peep part 41 and a pipe expansion part 42 is pressed from an opposite receiving face direction in a state that it is placed in a normal temperature state. In this way, the shaft tube 3 is plastically deformed and expanded in the outside diameter direction, is gnawed to the engaging pieces 11, 12, 21 and 22 of the journal 1 and the cam 2, and is stuck by shearing force and tensile force of the shaft tube 3.