Handing in dc arc solder is the arc welding method with a kind of laminose better aluminium alloy, the frit that its can dominate welding line already is deep, can rise again solder efficiency. Hand in function of solder of dc argon arc among them most agree with aluminium reachs what aluminium alloy, magnesium reachs magnesium alloy to solder, its have pulverization to adjust function, do away with the oxidation film of workpiece surface effectively; Welding line figuration brightness of good, surface is beautiful.
In recent years, aluminium alloy metalloid with character of its low temperature, quality light, more advanced than intensity advantage, already was applied in aerospace, car and civil industry widely, make a kind of important treatment material. As the development of science and technology, laminose aluminium alloy is become S1, s3 sparks guide, s2, when S4 closes, loop of electrify of direct current source is: S3 of → of electric arc of → S1 → , obtain in electric arc thereby half electric current, dc and welding wire is positive electrode sex is the ground, electric arc is stable, kitchen seams frit deep big, through undertaking be controllinged effectively to electric current, easy implementation welding wire fuses the drop that reach frit transfers. When S2, s4 guides, s1, when S3 closes, electrify loop is - S4 of electric arc of → S2 → , obtain the electricity that loses half in electric arc thereby, dc and when welding wire is negative pole sex, electric arc climbs on edge welding wire, electric arc is not stable, frit drop transfers not easily, solder bath is shallow, have electric arc follow stimulative welding wire climbs to fuse on welding wire and reduce electric arc to bath heat action, form the character with shallow deep frit. This shows, should control component of 2 groups of electrons to guide by turns only, the direction of electric current of switch electric arc, the relative scale of the accident that tells time through controlling cell of 2 groups of power to guide and weld time, attainable frequency and the scale when losing half set up an electric circuit is adjustable deliver direct current. Soldering in the process, according to the dimension requirement of weldment, the choice solders suitably voltaic frequency and enjoying rate of half weld time, controallable form appropriate welding line mass, solder especially shallow frit is formed when thin plate deep, guarantee against occurrence bath forms unsuccessful phenomenon, contented solder the requirement of quality.
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