"IMPROVEMENT IN WELDING PROCESS USING DIRECT CURRENT ("DC")

ELECTRIC WELDING MACHINE"

This report refers to an improvement in the welding process using a direct current

("DC") electric welding machine, which uses the electric arc for welding employing electrodes widely used in welding in a number of environments such as workshops and industries, having as a principle a wave rectifier so as to define a power source with a constant current feature capable of being adjusted for a number of applications.

With the conventional direct current ("DC") electric welding, in applying electrodes at

1.5 mm for welding thin plate, a handy welding machine of any brand is used, where we will find the following problems: when thin electrodes of 1.55 mm of any brand are used, half electrode is melted and after, from the second half on, it begins to heat until becoming read, making the rest of the welding impossible; and promptly upon beginning to weld, the 1.5 mm electrode starts to have undesirable sprinkles that interrupt the electric arc every time.

For reducing the sprinkles and reestablishing the electric arc, amperage is increased and the electric arc becomes more violent, and, as a consequence, it shall have a greater penetration, which makes the plate being welded to grow warm even more, worsening the problem even more.

Thus, the purpose of this invention is to provide an improvement in the welding process by using a direct current welding machine capable of eliminating the aforementioned inconveniences and basically comprehending therefor, the alteration of the open voltage parameter of machines that passes from the conventional modes, between 70-80 volts, to 90 volts, causing sprinkles to disappear, the electric arc to become stable, and making possible to the second half of the electrode used to not become read, and to be fully melted, without interruption.