Patent GB-943086-A (GB)
Title: Improvements in or relating to a device for soldering various parts
IPC: B23K1/00
Filed: 1960-02-16
Abstract: 943,086. Soldering. S.A. DES USINES CHAUSSON. Feb. 16, 1960 [March 2, 1959], No. 5491/60. Heading B3R. Apparatus for soldering comprises a set of wheels for conveying solder and driven by a reciprocating driving element and a first heating device for reciprocatory motion and a second heating device for rotary motion, the arrangement being such that with one of the heating devices on the apparatus, reciprocation of the driving element causes feeding of the solder and movement of the heating device. A frame 1, Fig. 1, carries a unit 2 comprising two solder wire feed devices for distributers 78, two control devices for heaters 7, a pair of reels 5 for tin solder wire and a detector 6 for each wire. The detectors actuate a warning when the end of the wire passes. The unit comprises a casing 22 in which are mounted two pairs of solder feeding wheels 25, 26, Fig. 5, and a double-acting hydraulic piston 30 mounted horizontally with its ends slidable in cylinders 31, 32. A rack 33 in the top of the piston engages a pinion 33, Fig. 7, on a shaft 35 which carries on each side of the piston a flange 36 and a flange 37 integral with a sleeve 40 which is locked to the shaft 35 in a desired angular relation by a locking device 42. A wheel 39 between the flanges has a transverse rod 48 whose ends engage in arcuate slots in the faces of the flanges, the locked angular position of the flange 37 determining the amount of free play of the wheel between the flanges, and the wheel is coupled by a ratchet device to a toothed wheel 51 which meshes with a pinion 52 on a shaft 53 carrying one of the solder feed wheels 25. The shaft 53 also carries a toothed wheel 61 engaged by a toothed wheel 62 on a shaft carrying the other wheel 26, the shaft being in a rocker arm 65, Fig. 3, normally spring urged towards the wheel 61 but movable away therefrom by a hand lever. A similar arrangement for the other pair of wheels 25, 26 is provided. The solder wires are fed through tubes 76 in the casing between the wheels 25, 26 to the guides 78. A pair of parallel vertical tubular members 97 are rotatably supported in the casing and have teeth 99 which engage with teeth 98 in the sides of the piston 30 and vertically slidable bushings 103 are mounted in the members 97, racks 102 on the bushings engaging pinions 93, Fig. 6, on a shaft 91 rotated by a rack 94 on the top of the piston 30. Heating devices are mounted in the bushings and members 97 in communication with the internal space of the members 97 which is supplied with gas from supplies 119 via annular chambers 120 and holes 121 in the parts 97. A cam 122 is carried on the end of the shaft 91 to control a valve for gas flow. The piston 30 is driven in each cycle of operation in an outward stroke in direction F1, Fig. 5, a stop for soldering, a return stroke and a stop for handling the soldered parts. During the outward stroke the shaft 35 is rotated but the flanges 36, 37 transmit only part of this rotation to the wheels 39, due to the lost motion of the pins 48 in the grooves in the flanges, so that the wheels 25, 26 feed lengths of solder through the guides 78. The racks 94, 98 on the piston cause the members 97 to be rotated and the members 103 to be moved vertically. During the first stop the cam 122 causes the gas valve to open and during the return stroke the shaft 35 is rotated but the ratchet does not allow rotation of the wheels 25, 26 and the members 97, 103 are rotated and moved vertically in the opposite direction. In operation with a pivoted heating device comprising two burner carrying members 125, 126, Fig. 11, on hollow supports 127 carried in the members 97, 103 for rotation only, the solder wire is fed through guides 78 on to a channel in a collector to be soldered on a water box during the outward stroke of the piston when the members 125, 126 are pivoted towards the soldering position. Gas is delivered by the valve and soldering effected. The solder wire may be fed into a spout which is heated by the burners so that the solder is melted and falls on to the work parts. In a modification the heating device comprises two members 125a, Fig. 15, carried on hollow supports 127a engaged in the parts 97, 103 but keyed to the parts 103 for vertical movement only. The burners 148 are arranged in star and each solder wire emerges into a melting pot 149 having two outlet spouts 156, 157, burners 158 being provided to melt the wire. During the piston outward stroke the wire is delivered and the burners descend and when the stroke ends the heating gas is supplied so that the parts are heated, the solder wire is melted and the pot kept hot. The wheels 25, 26 may be shaped to transport several wires at once.