APPARATUS FOR AUTOMATIC CORRECTION OF WELDING TORCH MOVEMENT Russian patent published in 2005 - IPC

FIELD: automation of electric arc gas-shield welding of dressed and angular seams under flux, namely apparatus for automatic correction of movement of welding torch, possibly in different branches of machine engineering.

SUBSTANCE: apparatus includes sine oscillation generator 1 whose outlet is connected to first inlet of multiplexer 2. Outlet of pulse generator 3 is connected to inlet of counter 4 and to inlet of one-shot multi-vibrator 5. Outlet of counter 4 is connected to second inlet of multiplexer 2. Outlet of one-shot multi-vibrator 5 is connected third inlet of multiplexer 2. First outlet of multiplexer 2 is connected to inlet of first power amplifier 6 and to first inlet of first flip-flop 7. Second outlet of multiplexer 2 is connected to inlet of second power amplifier 8 and to first inlet of second flip-flop 9 and to inlet of first inverter 10. Third outlet of multiplexer 2 is connected to inlet of third power amplifier 11 and to first inlet of third flip-flop 12 and inlet of second inverter 13. Fourth outlet of multiplexer 2 is connected to inlet of fourth power amplifier 14 and to first inlet of fourth flip-flop 15. Outlet of first power amplifier 6 is connected to inlet of first irradiator 16. Outlet of second power amplifier 8 is connected to inlet of second irradiator 17. Outlet of third power amplifier 11 is connected to inlet of third irradiator 18. Outlet of fourth power amplifier 14 is connected to inlet of fourth irradiator 19. Outlet of first ultrasonic oscillation pickup 20 is connected to inlet of first amplitude amplifier 21 whose outlet is connected to inlet of first detector 22. Outlet of the last is connected to inlet of first low-frequency filter 23 whose outlet is connected to second inlet of first flip-flop 7. Outlet of second ultrasonic oscillation pickup 24 is connected inlet of second amplitude amplifier 25 whose outlet is connected to inlet of second detector 26. Outlet of the last is connected to inlet of second low-frequency filter 27 whose outlet is connected to second inlet of second flip-flop 9. Outlet of third ultrasonic oscillation pickup 28 is connected to inlet of third detector 30 whose outlet is connected to inlet of third low-frequency filter 31. Outlet of filter 31 is connected to second inlet of third flip-flop 12. Outlet of fourth ultrasonic oscillation pickup 32 is connected to inlet of fourth amplitude amplifier 33 whose outlet is connected to inlet of fourth detector 34. Outlet of detector 34 is connected to inlet of fourth low-frequency filter 35 whose outlet is connected to second inlet of fourth flip-flop 15. Outlet of first flip-flop 7 is connected to inlet of first integrator 36 whose outlet is connected to first inlet of averaging unit 37 and to first inlet of first differential amplifier 38. Outlet of second flip-flop 9 is connected to inlet of second integrator 39 and to second inlet of unit of first analog memory 40 and to second inlet of second unit of second analog memory 41. Outlet of second integrator 39 is connected to second inlet of first differential amplifier 38 and to second inlet of averaging unit 37 whose outlet is connected to first inlet of second differential amplifier 42. Outlet of pickup 43 for measuring electrode extension is connected to first inlet of first adder 44 to second inlet of which signal is fed from setter 45 of electrode height. Outlet of first adder 44 is connected to second inlet of second differential amplifier 42 whose outlet is connected to first inlet of first unit of analog memory 40. Outlet of memory 40 is connected to unit 46 for controlling electrode height drive. Outlet of unit 46 is connected to electrode height drive 47 that is connected to welding torch 48. Outlet of rotation angle setter 49 is connected to third inlet of first differential amplifier 38 whose outlet is connected to first inlet of second unit of analog memory 41. Outlet of the last is connected to control unit 50 for controlling rotation angle drive of welding torch 48. Outlet of control unit 50 is connected to rotation angle drive 51 of welding torch and drive 51 is connected to welding torch 48. Outlet of third flip-flop 12 is connected first inlet of third integrator 52. Outlet of fourth flip-flop 15 is connected to first inlet of fourth integrator 53, to second inlet of third unit of analog memory 54 and to second inlet of fourth unit of analog memory 55. Outlet of second inverter 13 is connected second inlet of first integrator 36 and to second inlet of second integrator 39. Outlet of first inverter 10 is connected to second inlet of third integrator 52 and to second inlet of fourth integrator 53 whose outlet is connected to second inlet of second adder 56 and to second inlet of third differential amplifier 57. Outlet of third integrator 52 is connected to first inlet of second adder 56 and to first inlet of third differential amplifier 57 whose outlet is connected to fist inlet of fourth unit of analog memory 55. Outlet of fourth unit of memory 55 is connected to unit 58 for controlling correction drive of welding torch across butt. Outlet of unit 58 is connected to drive 59 for correction motion of welding torch across butt; drive 59 is connected to welding torch 48. Outlet of second adder 56 is connected to inlet of unit 60 for signal conversion whose outlet is connected to first inlet of third unit of analog memory 54. Outlet of third unit of memory 54 is connected to first inlet of amplifier 61 with variable amplifying coefficient. Outlet of setter 62 is connected to second inlet of amplifier 61 whose outlet is connected to control unit 63. Outlet of the last is connected to oscillator 64 that is connected to welding torch 48.

EFFECT: enhanced quality of welded joint due to more accurate position of electrode relative to butt by height, amplitude, inclination angle and shift value relative to butt.

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