Research on Technical of Dual-motor Long-distance Wire Feeding Control System
In industries such as aluminum tank trucks,steel structures and shipbuilding,the workpiece is large and the weld seam is long,and the welding process requires frequent movement of the wire feeder or welding power supply to complete the welding operation.In order to expand the radius of welding operation and reduce the mobile wire feeder and welding power supply,a two-motor long-distance wire feeding control system was studied,including a wire drawing motor and a wire pushing motor.In order to achieve good synchronous performance of the two motors,the control strategy of the existing multi-motor was analyzed,and the cross-cou-pling control method suitable for the dual motors was selected,and the speed difference between the wire draw-ing motor and the wire pushing motor was used as the coupling control variable.The welding arc voltage and speed difference were introduced as the adjustment variables of the speed of the wire drawing motor,and the adjustment variables of the speed of the push motor using the speed difference and the change of the motor cur-rent,and the high-precision laser velocimeter was used to test the speed of different wire feeding speeds for a long time under the condition of 15 meters of the wire feeding cable,and the phenomenon of welding wire stac-king does not occur during the test,and the deviation between the collected wire feeding speed feedback value and the set value is less than 0.2m/min,which meets the requirements of use.
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