Single power supply double-wire digital control automatic submerged-arc welder

Abstract

A digital controlled automatic dual-wire hidden arc welder with a single power supply is composed of the first and the second single-chip microprocessors, the first and the second triggers, the first and the second samplers, the wire feeding speed regulator, carriage speed regulator, arc welding rectifier, current by-pass circuit, the first and the second operating amplifiers, and the first and the second phototransistors. Their electric connection scheme is also disclosed.

Description

technical field [0001] The invention relates to an electric welding machine, in particular to an automatic submerged arc welding machine. Background technique [0002] Submerged arc automatic welding is the earliest welding method in the world that makes arc welding get rid of manual operation and adopt mechanical automation. It has a history of about 60 years and has been introduced to China for about half a century. Because it adopts high welding current, the arc is protected by slag phase, and there is no arc light during welding, it not only has high production efficiency and welding quality, but also has the best working environment for welders. It has long been used in shipbuilding, power plant boilers, chemical equipment, bridges and The main welding method in various steel pipe and steel structure manufacturing industries. [0003] It can be seen from Figure 1 that most of the existing single-wire and double-wire submerged arc welding machines are still controlled b...

AI Technical Summary

Problems solved by technology

The submerged arc welding machine with analog control has the following disadvantages: submerged arc welding is a multi-parameter process, and the control mode usually adopted by the analog circuit is to control the welding power source or the wire feeding mechanism separately, which cannot accurately control the welding working point; The arc process is manually completed by the operator based on experience, and it is difficult to guarantee its reliability and consistency; the analog closed-loop control is completed by an analog electronic circuit, which is likely to cause discrete performance of the welding machine and largely depends on the debugging link; welding parameters cannot effective management

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