| 摘要 |
<p>This invention relates to the fabrication of radiators (10) for use in motor vehicles, in particular to the formation of water tight joints between header panels (14) and radiator tubes (12) which are located in holes within the header panel (14). The tubes (12) are expanded by inserting an expansion finger (24) with a tapering end into the tubes (12) in order to reduce the gap between the header panels (14) and the tube walls before a brazed joint is formed. The tubes (12) are prevented from being pulled out of alignment when the fingers (24) retract by retaining members (32) in sliding contact with the fingers (24).</p> |
