| 摘要 |
<p>1291596 Welding by fusion BERNARD CO 1 Dec 1969 [4 Dec 1968] 58649/69 Heading B3R [Also in Division F2] A dual-purpose welding cable (i.e. one which conducts consumable electrode wire and welding current to a welding gun), comprises a conduit 18 and a liner 32 each in the form of a flexible tube formed of spring metal strip of rectangular cross-section helically wound to have turns with butted edges defining a seam which follows a helical path about the tube axis, and a plurality of flexible current conductors 17. As shown, the welding cable comprises an insulating outer 16, stranded helically wound conductors 17, conduit 18 and liner 32 for conducting electrode wire 41 to the head assembly 26 of the welding gun. A fitting 21 secured to one end of the conduit 18 is for attachment to an electrode feed machine comprising feed rolls 36. A similar fitting 23 secures the other end of conduit 18 to a gooseneck 25 of the gun. Each fitting 21, 23 has a bush 28 within which the conduit 18 is inserted and about which the conductors 17 are compressed by a sleeve 31. Liner 32 extends at both ends of the cable beyond fittings 21, 23; at the rearward end it extends to the rolls 36 while at the forward end it extends through gooseneck 25 to head assembly 26 where it is held in abutment with a ledge 43. For use in gas-shielded arc welding, an inlet 44 for gas opens into the passageway 46 between inner wall of gooseneck 25 and outer wall of liner 32. Conductors 17 may be of aluminium, or steel plated with a metal such as silver. Open-arc, gas-shielded arc and submerged arc welding are referred to.</p> |
