Views:0 Author:Site Editor Publish Time: 2022-01-03 Origin:Site
The electrofusion welding machines are divided into AC and DC. The main difference in application fields is that AC welding machines are generally used in steel structure manufacturing units or general machinery or agricultural machinery manufacturing units. DC welding machine is mainly used for welding of pressure vessels, boilers, pipelines, or important structural manufacturing units.
How to choose the current of the electrofusion welding machine?
What should we notice when using the electrofusion welding machine?
What does electrofusion welding machine output short circuit mean?
Selection of welding current:
1. To use an electrofusion welding machine, you need to select the appropriate welding current value according to the type of electrode and other factors. According to the thickness of the plate, the diameter of the electrode, and the welding current. The current is proportional to the thickness of the plate and the diameter of the welding wire. I=(35~55)d where d is the diameter of the electrode. For example, if the diameter of the electrode is 4mm, then the welding current value can be selected between 140-220A.
2. To use the electrofusion welding machine, you need to select the welding current according to the welding position: 140A (upper welding seam), 140-160A (vertical butt joint, horizontal butt joint), 180A or more (flat butt joint)
If it is all-position welding (including horizontal, horizontal, vertical, and upward positions), the selected welding current value should be the all-around current value, generally the vertical welding current value. When welding horizontal fixed pipes, the all-position welding current is used, and the welding current value of the vertical butt joint is generally used.
3. To use an electrofusion welding machine, you need to select the current value according to the welding level: generally, the bottom layer uses a smaller current value, the filling layer uses a larger current value, and the cover layer current value is relatively reduced. For example, welding flat butt, generally adopts multi-layer and multi-pass welding for opening groove, 150A current for bottom layer, and 180-200A current value for filling layer. The cover layer adopts a current value of 10-15A reduced to ensure beautiful appearance and no welding defects such as undercuts.
When using an electrofusion welding machine, you need to select the welding current based on production experience: look at the splash, the welding current roughly increases the arc force and the splash is large; when the welding current is small, the arc force is small, and it is difficult to distinguish between molten slag and molten iron. Look at the welding seam formation: the welding current is easy to undercut, and the residual height is small; the welding current is small, the welding seam is narrow and high. Look at the melting state of the welding rod: the welding current is large, the welding rod melts quickly and turns red, and the welding current is small and it is easy to stick to the arc.
The electrofusion welding machine dissolves the welding rod through a short-circuit arc. It can be understood that the welding gun is the positive electrode and the electrofusion welding machine is the negative electrode or the ground, so your welder should be grounded and the weldment should also be grounded. If an open circuit is displayed, it means that your welding machine has no output. It is possible that your electrofusion welding machine is not grounded.
WELPING Industry Co., Ltd. has focused on the production and development of electrofusion welding machines for several years, and they have always put the needs of customers as their top priority. Here, you can choose the electrofusion welding machine that suits your need.