Gas saving method for gas shielded welding

Abstract

The invention discloses a gas saving method for gas shielded welding. The method comprises the following steps that a throttle valve and an electromagnetic valve which are connected in parallel are arranged between the output end of a protective gas supply device and the gas input end of a gas shielded welding machine, the throttle valve is in an open state, the electromagnetic valve is in a closed state, and the opening and closing of the electromagnetic valve are controlled by a controller; a voltage sensor is adopted to detect the welding voltage of the gas shielded welding machine, and the voltage sensor is electrically connected with the controller; a current sensor is adopted to detect the welding current of the gas shielded welding machine, and the current sensor is electrically connected with the controller; and the controller adjusts opening and closing of the electromagnetic valve according to signals of the voltage sensor and the current sensor. According to the gas saving method for gas shielded welding, the protective gas can be saved to the maximum extent while the welding protective effect is guaranteed; and especially for some short welding seams, the protection gas saving effect is more obvious in the lifting gas supply and lagging gas closing process.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a gas-saving method for gas shielded welding. Background technique [0002] Gas metal shielded welding is the main welding method of robot welding at present. This method uses the arc between the meltable welding wire and the weldment as the heat source to melt the welding wire and the base metal, and transports the shielding gas to the welding area to make the arc, melting The welding wire, molten pool and nearby base metal are protected from the harmful effects of the surrounding air. [0003] In the welding process of gas shielded welding, it is necessary to strengthen the protective effect of the shielding gas on the weld by advancing the gas supply and delaying the gas closure, but this process will increase the consumption of additional shielding gas. Especially when the weld seam is short, the welding process starts and stops frequently, and each time it starts and stops...

AI Technical Summary

Problems solved by technology

[0003] In the welding process of gas shielded welding, it is necessary to strengthen the protective effect of the shielding gas on the weld by advancing the gas supply and delaying the gas closure, but this process will increase the consumption of additional shielding gas

Especially when the weld seam is short, the welding process starts and stops frequently, and each time it starts and stops, there will be early gas supply and delayed gas shut-off. The proportion of the actual welding time to the entire ventilation time will decrease, and the invalid shielding gas consumption will increase, thereby increasing welding. Cost of production

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