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Overlap joints
The most common preparation is with right angle edges; the weld is
completed with a standard angle cord. The materials must be as close
together as possible.
Flat butt joints
The weld must be performed in a single operation with sufficient
penetration of the base material. For this reason it is important to prepare
well.
- The factors which affect the quality of the weld are as follows: the current
intensity, the distance between the edges of the materials to be welded,
the inclination of the electrode and the diameter of the electrode.
- A higher angle to the workpiece means more depth penetration and
vice versa.
- To prevent or reduce deformation which can arise during solidification
of the material it is advisable, wherever possible, to fix the workpieces
in a clamping device or similar which exerts force in the opposite
direction of the expected contraction or deformation.
- Avoid stiffening of the welded structure to prevent breakages in weld.
These difficulties can be reduced. If at all possible, rotate the workpiece
so that the structure can be welded in two opposite places.
Corner joints
Joints on a flat surface
If the workpiece is of a manageable size, it should be arranged as
shown in the illustration.
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