How to judge the size of the current listen to a welder who has been engaged in welding for more than 10 years, beginners can correctly weld the current when welding will be very important to the quality of welding, because the welding current has a great impact on the molding of the weld.

The welding current is too small, which will cause the phenomenon of non-penetration, non-fusion and sticking electrode. The current is too large, will cause welding penetration, edge bite, and welding nodules and other quality defects.

How should the welder choose the right welding current when welding?

The master said that the correct choice of welding current needs to be selected according to a variety of parameters. Like the thickness of the weldment, the diameter of the electrode and the welding position.

For manual arc welding, the size of the welding current depends on the diameter and size of the electrode, which is usually the diameter of the electrode multiplied by the empirical coefficient.

The experience coefficient of the common 2-4 mm electrode is 30-40, and if the diameter of the electrode is 4-6, the experience coefficient is 40-60. It can be adjusted appropriately according to the specific situation of the site.

In the field, the welder can intuitively judge according to the actual situation, the arc is difficult, the welding rod is easy to stick, the forming is not smooth, and the welding rod is difficult to melt. On the contrary, if the welding spatter is too large, the weld pool is excessive, and the welding rod is red, the current is too large.

The size of the welding current selection also depends on the technical level and operating habits of a welder. Some novices need to adjust the current size according to the ammeter on the welding machine at the beginning, and experienced welders can judge by experience and the sound emitted when the welding rod burns.

According to the master, the sound emitted by the appropriate current is very uniform and smooth, and the shape and sound of the molten pool can be adjusted in a timely manner.

The old master said that each welder has its own skills and experience, and the current selection varies from person to person.

                HUARUI alibaba shop:

               https://topwelding.en.alibaba.com

                https://czhuarui.en.alibaba.com