In the manual arc welding, the skill of welder plays one of the important factors; the author treats the subjects on the training of welders, necessary equipments in welding practice and the qualification of welders.
During three months in the welding school, the trainees should be supplied with ample quantity of steel scrap, oxyacetylene cutting sets, breaking instruments of welded joints, etc., in order to assure the promotion of their own ability by producing great number of welded joints and breaking them to inspect the fractured surfaces of welds. Another three months, they will be helpers to the welders in the shop.
The easy posture of welders, good welding equipments and accessories, good electrodes and ingenious design of the joints will produce the good welding products. He prefers the AC-DC welding sets to AC transformers, and helmets to hand shields; and makes some remarks on the nature of electrodes and the design of the joints to be welded.
As fillet weld test specimens will include all the defects of welding procedure, if any, and as bending test will show the ductility of the welds, he asserts that both tests must be done along with the butt weld test in the qualification of welders.
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