| 摘要 |
PURPOSE: A tube joint and method of constructing the same is provided to attach a drop-off prevention ring to the end of the tubing with a simple device, reduce the cost, improve the durability, and minimize the size of the entire tube joint. CONSTITUTION: One end(T1) of a tubing(T) is heated to be softened. The softened end(T1) of the tubing(T) is inserted into a drop-off prevention ring(30). The end(T1) of the tubing(T) is upset by means of an upsetting core such that the anchoring portion(35) of the drop-off prevention ring(30) bites into the softened end(T1) of the tubing(T), and the end(T1) of the tubing(T) is cooled to be hardened with the anchoring portion(35) of the drop-off prevention ring(30) being kept biting into it, and to such tube joint.
|
