Protection gas control device

Abstract

The invention provides a protection gas control device, which is easy to determine or adjust the gas flow in any operation environment. When a gas checking switch (117) on a gas control device (9) is switched to on, the protection gas control device outputs a signal to a control circuit (105); when a signal is input into the control circuit (105), the control circuit outputs the control signal toa gas valve (107) and the gas valve (56) of a welding machine (5), thus, opening two valves. At this time, the user can manually or operates an operation unit to adjust the gas flow of the gas valve (107) or the gas valve (56); In addition, the user can immediately judge that the welding is unable to process under the bad environmental circumstance, thus preventing waste for the protection gas, the electricity charge or the time.

Description

technical field [0001] The invention relates to a shielding gas control device for controlling the flow of shielding gas provided by a butt welding machine. Background technique [0002] Arc welding is a welding method that utilizes an electric discharge phenomenon (arc discharge) to connect the same metals. When arc welding starts, an arc is generated, and the temperature of the electrode rises rapidly, and after the end of arc welding, the temperature of the electrode gradually decreases due to the arc extinguishing. As described above, since the electrodes are at a high temperature from the beginning to the end of the arc welding, the electrodes may be oxidized to lower the welding quality or generate welding defects. Therefore, in order to protect the electrode and prevent welding defects, a kind of gas shielded arc welding is being popularized, that is, from the beginning of the preflow before the start of the arc welding to the end of the afterflow after the arc is ex...

AI Technical Summary

Problems solved by technology

However, even if an arc occurs, such as welding work at a high place, there is a distance between the safe place and the gas cylinder, and the confirmation of the gas flow rate is complicated.

In addition, depending on the situation, although the confirmation of the gas flow rate is insufficient, a certain period of time has elapsed, and this operation may have to be repeated several times.

In addition, welding itself cannot be performed in places where the environment is too harsh such as strong winds, so the adjustment of the gas flow will waste shielding gas, electricity costs, or time.

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