| 摘要 |
<p>1,075,004. Welding by pressure. ETABLISSEMENTS SANDRET. Feb. 5, 1965 [Feb. 19, 1964], No. 5220/65. Heading B3R. In a method of welding heat-dissipating wires 3 to a flat superpentine condenser coil 2 the coil 2 is arranged vertically and raised intermittently and wires 3 are welded transversely to both sides of the coil 2 by electrodes 15, 16 at each pause. An apparatus for carrying out the method comprises stores 8 from which are vibrated the wires 3 to a support 11. Suction nozzles 12 pick up individual wires 3 and drop them down surfaces 14 ready for welding by the electrodes 15, 16. Pusher-members 27, controlled by lever 31 and cam 33, raise the coil 2 by means of sawteeth 28 which lifts on the recently welded wires 3 and holds the coil while another wire is welded. The electrodes hold the coil 2 while the saw-teeth are lowered and sprung through the newly welded wires ready to raise the coil again. The electrodes are moved in sequence by cams 17, 18 against springs 25, 26 and are fed with welding current by a contact-maker actuated by a cam or other suitable means. The coil 2 carries along its top a carriage 37 that runs along vertical rails. A switch is arranged in a frame at the top of the apparatus which is automatically operated by the carriage 37 to stop the apparatus when the coil is fully raised. A magnetic retaining device is used to hold the carriage 37 in its raised position to facilitate the removal of a completed coil and the replacement of a new coil.</p> |
