Weld Classification

Welds in appearance are divided into

• normal (flat);
• convex (Reinforced), and
• concave (or weakened).

Welds in appearance

Convex weld better with a static (constant) loads, but they are uneconomical. Normal and concave joints are better suited for dynamic and alternating loads, as through a more seamless transition from the base metal to the weld reduced the likelihood of stress concentrations that lead to the destruction of the joint.

The implementation of welds may be unilateral or bilateral.

implementation of welds

By the number of layers of welding is a single-layer and multilayer, the number of passes - one pass and multipass.

Multi-layer suture is used for welding of thick metal, and also to reduce the heat-affected zone. Passage - a single heat source moving in one direction during welding or surfacing. Roller is part of the weld metal, which was naplavlena in one pass. layer of weld - the weld metal consisting of one, two or more cylinders, which are placed on a level cross-section of the seam.

Depending on the length of welds are continuous and discontinuous. Butt joints are usually made ​​continuous. Fillet welds can be made

• continuous;
• intermittent one-way;
• bilateral chain;
• bilateral chess;
• and can be dotted.

Fillet welds

In the direction of acting force welds are divided into

• longitudinal (flank) - the direction of acting force parallel to the axis of the weld;
• transverse (frontal) - the direction of acting force perpendicular to the axis of the weld;
• Combination - a combination of longitudinal and transverse joints;
• Skew - the direction of the current effort is placed at an angle to the axis of the weld.

On the situation in the area seams are divided into:

• lower (H);
• "The boat" (A);
• horizontal (H);
• polugorizontalnye (Pg);
• semi-vertical (PV);
• vertical (V);
• polupotolochnye (PP);
• Ceiling (R).

By appointment welds are

• strong;
• tight (sealed);
• firmly-tight.

Depending on the conditions of the weldment joints are divided into

• workers, intended for direct loads;
• non-business (or binder connectors), used only to connect parts of the weldment.

As the width of the welds are divided into

• needles with a seam width equal to or slightly greater than the diameter of the electrode, are performed without transverse vibrational motions of the welding electrode;
• broadened, which operates with transverse vibrational motion of the electrode.

Weld seams and joints:
geometry of the weld seam
weld classification
the effect of welding parameters on the shape and size of weld