What Is a Bead Weld?

A welded seam is a seam formed by melting and connecting the welding rod and the metal at the joint using the high temperature of the welding heat source. After the weld metal has cooled, the two weldments are joined together. According to the shape of the weld metal and the mutual position of the weldment, it is divided into butt weld, fillet weld, plug weld and electric riveting. Butt welds are often used for the splicing of plates and sections; fillet welds are often used for lap joints; plug welds and electric riveting are less commonly used. They are only considered for reducing the overlap length of weldments.

(1) There are five types of butt welds, fillet welds, plug welds, slot welds, and end welds depending on the type of weld joint.

1) Butt welds. Weld seam between the bevel surface of a weldment or the bevel surface of one part and the surface of another part.

2) Fillet weld. Weld seam welded along the intersection of two orthogonal or near orthogonal parts.

3) Terminate the weld. Forms the weld formed by the termination joint.

4) Plug the weld. The two parts overlap, one of which has a circular hole, and the weld formed by welding the two plates in the circular hole. Only the corner constant seam in the hole is not plug welding.

5) Slot weld. The two plates overlap, and one of them has an elongated hole, and the welds of the two plates are welded in the elongated holes. Only the fillet welds are not slot welding.

Butt welds : According to the degree to which the weld metal is filled with the base metal, it is divided into welded butt welds and unwelded butt welds. The unwelded butt welds are subject to very little stress and severe stress concentrations. The welded butt weld is referred to as butt weld.

In order to facilitate the construction, ensure the construction quality, and ensure that the butt welds are filled with the gaps of the base metal. Different bevel forms are adopted according to the thickness of the steel plate. There is a pad under the I-shaped seam (

1.The first-level welds require 100% of the length of each weld.

To prevent the workpiece from being heated during welding

The parameters representing the geometry of the butt weld are the weld width,

During fusion welding, the weld width (c) and

When welding, the physical quantities (such as welding current, arc voltage, welding speed, line energy, etc.) selected to ensure welding quality are collectively called welding process parameters. The influence of process parameters on weld shape is as follows:

(1) Welding current When other conditions are unchanged, increasing the welding current increases the thickness and remaining height of the weld, while the width of the weld remains almost unchanged (or slightly increased).

(2) Arc voltage When other conditions remain unchanged, the arc voltage increases, the weld width increases significantly, and the weld thickness and residual height decrease slightly.

(3) Welding speed When other conditions remain unchanged, the welding speed increases, and the weld width, weld thickness, and remaining height decrease.

Welding current, arc voltage and welding speed are the three major welding process parameters during welding. When selecting these, the proper cooperation between these three should be considered to obtain a good shape and meet the requirements of the weld. ^[3]