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SETTING UP & WELDING
Visually inspect the weld. A good weld will result in an
all round weld with a small visible witness of spatter
surrounding the flange of the stud.
A cold stud weld is noticeable by undercutting of the
flange and lack of / minimal formation of spatter. A
cold weld is usually caused by too little energy and / or
too high spring pressure.
A hot stud weld is noticeable by excessive spatter
formation and partial melting of the flange. A hot weld
is usually caused by too much energy and / or too little
spring pressure.
A one sided stud weld (arc blow) is usually caused by
incorrect earthing of the work piece. This may be
corrected by placing the welding earths opposite each
other across the area where the weld is to occur.
Finished studs may be subjected to a bending test to ascertain the
strength of the weld. This may be achieved by placing a bending bar
assembly, fitted with the correct nozzle, over the stud and bending
the stud through 30° and then back to the vertical. This test follows
the specification of BS EN ISO 14555:2014.
A simpler test may be achieved by bending the stud over 30° using
a hide mallet.
Содержание M8
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