How to adjust the current and voltage in gas shielded welding?

Gas shielded welding is a common welding method, which has the characteristics of fast welding speed and high welding quality. Adjusting the current and voltage of gas shielded welding can change the hot welding parameters in the welding process, thus achieving the best welding effect. How to adjust the current and voltage of gas shielded welding to obtain the best effect will be described in detail below. First of all, current is an important parameter affecting welding speed and welding heat input. Adjusting current can change welding heat input by increasing or decreasing welding current. Generally speaking, excessive welding current will lead to excessive melting of welding materials and formation of excessive welding slag; However, too small welding current will lead to unstable welding and low strength of welded joints. Therefore, when adjusting the welding current, it is necessary to choose according to the type and thickness of welding materials and the requirements of welding joints.

Secondly, voltage is a parameter that affects the length and stability of welding arc and welding heat input. Too high welding voltage will lead to too long arc, too deep welding pool and unstable weld shape; But if the welding voltage is too low, the arc will go out, the welding pool is too shallow, and the shape of the welded joint is not good. Therefore, when adjusting the welding voltage, it is necessary to consider the requirements of welding current and welding joint to make the welding voltage reach the optimal value.

In order to achieve the best effect of gas shielded welding, we can take the following steps:

1. Select appropriate welding current and voltage according to the type and thickness of welding material. Generally speaking, the selection of welding current and voltage should be determined according to the type of welding joint, the thickness of material and the welding requirements.

2. Trial welding in the actual welding process. Through trial welding, the welding current and voltage can be adjusted, and the shape and welding defects of the welded joint can be observed to determine the best welding parameters.

3. Adjust the welding current and voltage to improve the welding effect. When welding, the welding current and voltage can be adjusted according to the weld shape and welding defects, thus improving the welding quality.

4. Pay attention to the stability of welding current and voltage. In the welding process, the fluctuation of welding current and voltage will affect the shape and quality of welding joint, so we should pay attention to keep the welding current and voltage stable.

In a word, the adjustment of current and voltage in gas shielded welding is an important factor affecting welding quality. By selecting appropriate welding current and voltage, conducting trial welding and adjusting welding parameters to ensure the stability of welding current and voltage, the best gas shielded welding effect can be obtained.