Double welding torch direct-current arc welding and power generation machine

Abstract

The invention discloses a double welding torch direct-current arc welding and power generation machine, which comprises a machine base, a rotating shaft, an electric brush device, a sliding ring as well as a main generator and a vice generator which have same number of poles, wherein the main generator has a first excitation regulation circuit with closed-loop automatic adjustment; and the vice generator has a second excitation regulation circuit with open-loop regulation. When the welding current of single torch is smaller than 50 percent of Ihm, double torches can be used simultaneously, thus improving the usage rate of welding machines and saving energy sources. When the current of the electric welding machines is greater than 50 percent of Ihm, output terminals of the two electric welding machines can be parallelly used.

Description

technical field [0001] The invention relates to a dual-purpose machine for DC arc welding and power generation, in particular, it is an engine-driven DC arc welding power source and a power frequency (50HZ or 60HZ) power source that can simultaneously provide dual welding torches. machine. Background technique [0002] Chinese patent ZL2007200670403 (the applicant's authorized patent) discloses a dual-purpose machine for DC arc welding and power generation, which has the advantages of high welding efficiency and good welding quality, and can simultaneously provide power frequency auxiliary power for power tools ,illumination. However, this patented product cannot provide double welding gun operation, and the welding current adjustment is mainly realized by changing the taps of the reactor, so there are many reactor taps, the manufacturing process is complicated, the switch structure is complex, and it is prone to failure; the welding voltage adjustment is achieved by changi...

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Problems solved by technology

However, this patented product cannot provide double welding gun operation, and the welding current adjustment is mainly realized by changing the taps of the reactor, so there are many reactor taps, the manufacturing process is complicated, the switch structure is complex, and it is prone to failure; the welding voltage adjustment is achieved by changing the resistance value of the resistor It belongs to the open-loop adjustment method. Due to the thermal stability of the resistor, the welding quality is insufficient due to the large change rate of the arc welding voltage in cold and hot states.

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