Wire feeding system of double-motor combined welding wire coordinating mechanism

Abstract

The invention belongs to the field of welding devices, particularly relates to a wire feeding system of a double-motor combined welding wire coordinating mechanism. The wire feeding system specifically comprises an upper computer (1), an interface circuit (2), a push-pull wire motor control unit (3), a push-pull wire feeding servo motor unit (4), a welding wire coordinating mechanism (5), a push wire motor unit (6) and a PWM speed adjusting circuit (7), wherein the upper computer is connected with the push-pull wire motor control unit via the interface circuit and connected with the PWM speed adjusting circuit, and used for totally controlling the whole push-pull wire feeding system; the push-pull wire motor control unit is used for closed loop control of the push-pull wire feeding servo motor unit; the PWM speed adjusting circuit is used for driving and controlling the push wire motor unit; the welding wire coordinating mechanism is an intermediate link for connecting the push wire motor unit with the push-pull wire feeding servo motor unit. The wire feeding system is mainly combined with a digital welding power source and capable of realizing various welding technological methods based on high-frequency feed-draw welding wires.

Description

technical field [0001] The invention belongs to the field of welding equipment, and in particular relates to a wire feeding system with double motors and a welding wire coordination mechanism. Background technique [0002] The wire feeder is the basic equipment for melting electrode welding, and the performance of the wire feeder directly affects the stability of the welding process. Usually a complete wire feeding system consists of two parts - the mechanical part (including the drive motor and mechanical transmission) and the control circuit. In order to meet the requirements of different welding processes, with the development of welding technology, push-type, pull-type and push-pull wire feeding mechanisms have appeared successively. Since the 1980s, many achievements have been made in the research of push-pull wire feeding mechanism on how to reduce wire feeding resistance and solve technological problems such as droplet forcing. Generally speaking, the current push-p...

AI Technical Summary

Problems solved by technology

In order to better cooperate with the droplet transfer process, the push-pull wire-feeding short-circuit transfer welding process has high requirements on the dynamic response speed of the welding wire, and the torque of the stepper motor will decrease when it rotates at high speed, and at a higher pulse frequency There will be lost steps, so that this method can only be welded at a lower feeding-retracting frequency of the welding wire, which is difficult for practical application

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