| 摘要 |
1,090,237. Jointing by tube expanding and by forging. J. H. MILLAR. April 30, 1964 [Feb. 1, 1963], No. 4267/63. Headings B3A. B3H and B3J. [Also in Division F2] A method of securing a ferrule having internal annular grooves 8 to a tube 2 comprises inserting a sleeve 6 of ductile material into the tube and expanding the sleeve and the tube into the grooves 8. The tube may be of aluminium or aluminium alloy, or form the end of a stainlesssteel corrugated bellows, the ferrule being of aluminium or stainless-steel; the sleeve-metal is not stated. A tapered section 14 is formed at one end of the ferrule and a shoulder 10 at the other for engagement by the sleeve and/or tube. The sleeve and tube are expanded by frusto-conioal rolls, as described in Specification 692,571.
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