| 摘要 |
<p>A unitary assembly of tubing (10) and an end fitting (16). The end fitting (16) including any fitting appropriate to the end application having a tubular bore extending therethrough. A radiused transition (20) is coaxially provided in the bore (28) at the appropriate interval where the bore (28) constricts. The end of the tubing (10) is coaxially impacted, expanded and sized to an external configuration and dimension that achieves an interference fit relative to the tubular bore (28) through the end fitting (16). The non-expanded end of the tubing (10) is inserted into the largest bore (28) in the end fitting (16) past any transitions and through the smallest bore until it experiences interference from the expansion. The interference is overcome by pressing the expansion into the bore (28) in the end fitting (16) until the expansion is completely seated into the end fitting (16). The expanded tube and end fitting assembly is machined coaxially using a stepped cutting tool. The stepped cutting tool machines the inside diameter of the tube where it has been reduced during end forming, swages the expanded tube into the end fitting bore, machines the female pilot land, machines the sealing surface and machines the visible parting line between the tube and end fitting (16).</p> |
