| 摘要 |
<p>1356541 Jointing by tube expanding PONTA-MOUSSON SA 11 Feb 1972 [1 March 1971] 6425/72 Heading B3J A tube 3 with one or more inner weld ribs 4 is expanded to form a joint with an outer member 1 by means of a mandrel 6 which has one or more outer recesses 7 to accommodate the ribs. As shown, the expander 6 has a single recess 7 for receiving the rib 4, which may be a helical weld bead. The outer member 1 and the tube 3 may be of metal or plastics.</p> |
