| 摘要 |
1,209,427. Welding by fusion. SIEMENS A.G. 3 April, 1969 [8 April, 1968], No.17503/69. Heading B3R. [Also in Division H5] A gas-shielded plasma welding torch, for the production of electrical connections to micro-components, comprises a cylindrical torch body 1, a collet 4 for the electrode, a nozzle 6 with a cooling chamber 5, a gas-shielding nozzle arrangement 8 surrounding the nozzle 6, and the usual connections and lines for plasma gas, shielding gas, cooling medium and welding current, and is characterized by two conduits 9, 10 for the supply of cooling water to nozzle 6 permanently connected to the nozzle and passing through bores 11, 12 in the torch body 1 and being connected at the torch end to the water supply and return connections by plugging into glands 16 which can be screwed or plugged into the bores 11, 12. The various torch components are readily separable for maintenance, the gas-shielding nozzle 8 being screwed on to the torch body 1 and having a ring 14 pressing the nozzle 6 on to the torch body. Shielding gas flows via a bore 13, Fig. 3 (not shown), in the torch body 1 into a ring- shaped channel 17 of shielding nozzle 8 and then via bores 18 of ring 14 to the exit portion of the torch. Plasma gas flows through the collet receiver 3 and through side slots in the collet 4 and a bore in the collet into the nozzle 6. Collet receiver 3 and collet 4 are used for current supply. The torch body fits into a machine holder and has appropriate locating shoulders or stops (not shown), for this purpose. |
