Patent GB-710039-A (GB)
Title: Improvements in fusion welding machines
IPC: B23K5/06
Filed: 1952-06-05
Abstract: 710,039. Uniting by fusion. AMERICAN VISCOSE CORPORATION. June 5, 1952 [May 9, 1952], No. 14226/52. Class 83 (4) In an automatic machine for fusion welding or applying molten metal to a backing &c. the torch 14 is vertically and transversely reciprocated over the work W while being intermittently fed along the weld line, fusible welding rod being intermittently fed to the work in the vicinity of the torch. Metal sheet W supported on a trolley P, Fig. 1, above a machine bed T is welded by a torch 14 which is vertically and horizontally reciprocated by mechanism supported in a carrier 3 running on a horizontal support 4 mounted on posts 5 above the machine bed T. A reel 11 of fusible welding rod 13 is supported on arms 10 from the carrier 3 and the rod is fed in the vicinity of the torch by mechanism in the end of a bracket 15 mounted on a part of the horizontally reciprocating mechanism for the carrier 3. Mechanism for intermittently feeding the carrier 3 along the supports 4 is also mounted in the carrier. The torch reciprocating mechanism comprises a sleeve 40, Fig. 3, slidably keyed on a shaft 42 mounted in bearings 43 on side plates 44, 45 of the carrier 3 and driven through a chain sprocket 46 from a motor 69 (not shown) mounted in the carrier. The sleeve is horizontally reciprocated by a wobble plate 53 mounted thereon and maintained in engagement with a roller 65 on the carrier by springs 66 (not shown). The mounting 60 for the roller 65 is vertically adjustable to vary the throw by a screw 61. The torch 14 is supported by a spring-loaded plunger 34 depending from the sleeve 20 by side plates 18 suspended from bearings 19 on the sleeve 20 and supporting a plate 16 slidably located in the carrier 3 by guides 16b, 16c, Fig. 4. The plunger 34 is yieldingly engaged with a cam 41 rotating with the sleeve 20 and is slidable in the plate 16 to permit vertical reciprocation of the plunger 34 and torch. A drive for the intermittent feed of the carrier 3 along the support 4 is obtained from an eccentric 99, Fig. 6, on the shaft 42 which intermittently rotates a shaft 131 carrying a pinion 135 (not shown) engaging a rack 148, Fig. 1, on the underside of the beam 4. The cam 99 oscillates a link 105 about a pivot 107, the free end of the link 105 being coupled through a push rod 128 to a freewheel clutch 132 on the shaft 131. A mounting 110 for the pivot 107 is adjustable in position by a handwheel 119, the pivot being slidable along the link 105 to vary the throw of the clutch 132 so that the rate of feed of the carrier 3 may be adjusted. A clutch (not shown) on the shaft 131 may be. used to disconnect the feed as when moving the carrier manually into starting position. The bracket 15, Fig. 9, supporting the fusible welding rod feed mechanism is mounted on the underside of the plate 16 and the drive for the feed is obtained from a cam 56 on the sleeve 20 through push rods 79, 86, pivoted link 80 and a one-way clutch 90 on a shaft 91 carrying feed rolls 97 (not shown) engaging the rod 13. The rate of feed is adjustable by varying the position of the link 80 in its pivot 81 by nuts 84. In a modification (not shown) a fixed shaft in the carrier has a cam for vertically reciprocating the torch and a wobble plate which oscillates the slide transversely, a pair of arms on the slide engaging the faces of the wobble plate. In this example a clutch is automatically engaged and disengaged as the slide moves and intermittently drives eccentrics actuating ratchet feed devices for the carriage and fusible rod.