What is the shape of the face of the weld bead?
A weld with a convex contour has a face that protrudes out in a convex shape from its toes; a weld with a concave contour has a face that is concave (sinks in from its toes); and a weld with a flush contour has a face that is flush with the base metal, or is flat from one toe to the other.
What is weld shape?
The shape of a weld is important because it can influence the soundness or performance of the joint. If a weld is sectioned transversely and then polished and etched, the cross-sectional shape of the weld can be seen. … For example, if the weld face has too much excess weld metal, the weld is said to be ‘peaked’.
What factors affect a weld bead shape?
The shape of the weld is divided into factors such as length, angle, and area, and the effect of each factor on the fatigue strength was analyzed. The fatigue strength increased with the increase of the length of the legs and the length between the upper plate and the lower plate.
What is weld face?
The exposed surface of a weld on the side from which welding was done.
What is undercut in welding?
Undercutting. Undercutting is a groove or crater that occurs near the toe of the weld. When this weld flaw occurs, the weld metal fails to fill in that grooved area, resulting in a weak weld that is prone to cracking along the toes.
What are the 3 main types of welding?
Three of the most common are Arc, MIG (Metal, Inert Gas) or GMAW (Gas, Metal Arc Welding), and TIG (Tungsten Inert Gas) welding. In order to know which process is best for the particular job you’re working on, here’s what you should know about each of them. Arc welding is the oldest of these three welding processes.
Why are welding symbols used?
Weld symbols are how the designer of a custom metal form communicates how objects should be welded to welders working the manufacturing line. Without clearly-marked weld symbols, the welder won’t know where to place a weld, what type of weld should be made, and the weld size.