| 摘要 |
The circuits are used in machine-building, construction, chemical industry and other branches. It has a simplified design, a facilitated adjustment of the control elements and it increases the efficiency by controlling the welding unit and the productivity and decreases the energy costs. The circuit includes respectively coupled a wire-supply unit (1), a welding aggregate (2), an automatic welding unit (3), a control block (4), blocks of sensors for obstades (5) and for a lateral leading surface (6), a first, a second and a third summator (7, 13 and 16), a window comparator (8), an electromagnetic lock (9), a first, a second and a third analogue regulator (10, 12 and 15), a rpm feedback tachogenerator (11), a circuit feedback block (14), a timer (17), a block for light signalisation (18), a waiting and adjustable multi-vibrator (19 and 20) and a control panel (21).
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