Novel digital pulse gas shielded welding control circuit

Abstract

The invention discloses a novel digital pulse gas shielded welding control circuit. The novel digital pulse gas shielded welding control circuit comprises a power supply circuit, a gas shielded welding remote control given circuit, a wire feed gas valve circuit, a constant current ring circuit, a voltage and current sampling circuit and a microprogrammed control unit (MCU) basic peripheral circuit. Alternating current power supply provided externally by the power supply circuit enters through a power strip A1, positive voltage and negative voltage are output from a second pin and a fourth pinof a silicon bridge D2 respectively through rectification of the silicon bridge D2, the positive voltage reaches a switching power supply U2 through a silicon bridge D3 and smoothing of a capacitor C7and a capacitor C6, and the positive voltage becomes stable +15V through smoothing voltage stabilization treatment of the switching power supply U2 and an output peripheral circuit composed of a silicon bridge D4, an inductor L1, a capacitor C8, a resistor R8, a resistor R5 and a capacitor C5. According to the design of the novel digital pulse gas shielded welding control circuit, the implementation of complex functional logic and algorithms is attributed to a microprogrammed control unit (MCU), the retained hardware part is an only necessary power amplifier part, hardware design is designedto be minimal, the universality and compatibility of products are optimized, the past history of realizing a complex algorithm by building an artificial circuit is completely over, and the reduction of hardware increases the reliability of a system and reduces the failure rate.

Description

technical field [0001] The invention relates to the technical field of welding circuits, in particular to a novel digital pulse gas shielded welding control circuit. Background technique [0002] Gas shielded welding is a high-efficiency, high-energy-saving welding method. It has been widely valued by various countries and has become one of the main technologies in steel structure welding. With the improvement of welding quality requirements, the shortcomings of gas shielded welding are also reflected. , one is the large spatter, welding designers have been looking for ways to improve. Short-circuit transitional gas shielded welding is a common welding method in gas shielded welding. Generally, thin welding wire (below 1.6mm) is used to melt the welding wire through short circuit and arc burning to complete the welding. The spatter of short-circuit transition welding mainly comes from the instantaneous short-circuit spatter in the early stage of short-circuit and the vapori...

AI Technical Summary

Problems solved by technology

However, with the increasing demand for multi-functional pulse welding machines in the market, the traditional analog control circuit has been unable to adapt to the realization of complex logic and complex algorithms of multi-functional pulse welding machines.

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