Patent GB-422583-A (GB)
Title: Improvements in or relating to welding or soldering machines
IPC: B23K5/06
Filed: 1933-09-15
Abstract: 422,583. Soldering ; uniting by fusion. SA. FRAP SOC. ANON. POUR LA FABRICATION DES RESERVOIRS ET APPAREILS SOUS PRESSION, 74, Rue Gide, Levallois-Perret, Seine, France. Sept. 15, 1933, No. 25563. Convention date, June 30. [Class 83 (iv)] In an automatic blowpipe soldering or welding machine in which the edges to be united are separated by a gap and arranged vertically at the uniting point, relative movement is produced between a blowpipe and a holder for the soldering wire &c. arranged above the blowpipe, the blowpipe and holder being carried by a common member between which and the work, relative movement is produced to effect a joint with an overthickness on each face of the parts. In welding the longitudinal seam b<1>, b<2> in a cylinder h, the end 2 of the wire traverses a circle of radius r about a point 1 on the axis x-x of the blowpipe 4, the weld metal being deposited so as to project on both sides of the seam at g<1>, g<2>. The cylinder is held on a fixed support 76, Fig. 14, by an adjustable V-shaped clamp 77, the support and clamp being also adjustable on a vertical rod. The wire holder 5 and blowpipe 4 are mounted on a compound slide 109, 113 on a platform 6. The platform may be traversed vertically on guide rods 80 by a rotatable screw 82, bevel gear 84 and reducing and reversing gear 86-89 from a motor 90 or the work may be traversed or both work and platform. The carriage 109 is adjustable in a plane parallel to the seam by a screw 111, Fig. 5, and the carriage 113 is adjustable in the direction of the seam by a screw 115. The blowpipe is carried by a sleeve 119 so that it may be angularly adjustable on trunnions 118, and is connected by a clamp 121 to a screw 120 so as to provide for axial adjustment thereof. The wire holder is carried by a head 19, which is bolted to a frame 36 having hollow trunnions 37 so that it may be angularly adjusted and secured in position by nuts 124, Fig. 7. In order to effect the circular movement of the holder a shaft 13, Fig. 5, driven through reducing gear 12 from an electric motor 11 on the platform 6 is geared to a shaft 54, connected by a universally jointed telescopic shaft 51 to a shaft 43, Fig. 8, mounted in ball bearings in a member 45. The shaft 43 has a crank disc 42, the pin 41 of which passes through ball bearings in a block 39 provided with rods 38. In order that the holder moves parallel to itself during the circular movement the trunnions 37 are slidable horizontally in guides 37<b> carried by blocks 37<a> slidable vertically on posts 48 fixed to the slide 113. The amplitude of the circular movement may be varied by replacing the piece 43, 42, 41. Vertical adjustment of the wire holder is effected by providing the member 45 with arms 46 slidable on the posts 48 and secured in position by screws 47. The wire is fed either in lengths or from a loose coil 16, through the head by a driven roll 25 and an idle roll 24, the latter of which is carried by a spring-pressed adjustable bracket 28. The shaft of the roll 25 is rotated through a universally jointed telescopic shaft 70 from a ratchet wheel 62 driven by a pawl, connecting rod and adjustable crank from the shaft 13. The platform 6 may carry a stop co-operating with an adjustable stop on the guide rod 80 so as to operate switches to stop the motors 90, 11 at the upper end of the stroke of the platform. The platform may be automatically returned by operation of a reversing switch which may be combined with the first switch controlling the motor 90, or the motor 90 may be restarted to return the platform after inserting a quick return gear by a handle 86, the platform being finally stopped by a second pair of stops. The whole machine may be driven by a single motor. In making circular welds, the work may be mounted in a holder rotated by gearing from a motor 92. A fixed and a movable platform such as 6 may be used in welding longitudinal and circular seams simultaneously, or two fixed platforms co-operating respectively with a work slide and a rotary work holder may be used for this purpose. Several platforms, each carrying a blowpipe and wire holder and controlled by a single operator may be used to effect several operations simultaneously, some of the platforms being movable and some fixed or all movable or all fixed.