tailieunhanh - TIG Book Episode 12

Tham khảo tài liệu 'tig book episode 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | XII. Glossary Advanced Squarewave The advanced AC output available from certain types of power sources. The wave is much more square than the conventional Squarewave power source. It also has expanded balance control to 90 electrode negative max penetration and the ability to control arc frequency arc direction . Some have the additional ability to adjust the amount of current in the electrode negative and electrode positive cycles independently. Air Carbon Arc Cutting A cutting process by which metals are melted by the heat of an arc using a carbon electrode. Molten metal is forced away from the cut by a blast of forced air. Alternating Current AC An electrical current that reverses its direction at regular intervals such as 60 cycles alternating current AC or 60 hertz Hz . Amperage The measurement of the amount of electricity flowing past a given point in a conductor per second. Current is another name for amperage. Annealing The opposite of hardening. A heat treating process used to soften a metal and relieve internal stresses. Anodize To anodize aluminum is to coat the metal by either chemical or electrical means. The coating provides improved corrosion and wear resistance. The thickness of this coating depends upon the length of the treatment. This coating is often removed from the area to be welded. This coating can be reapplied after welding. Arc The physical gap between the end of the electrode and the base metal. The physical gap causes heat due to resistance of current flow and arc rays. Arc Length Distance or air space between the tip of the electrode and the work. Arc Voltage Measured across the welding arc between the electrode tip and the surface of the weld pool. Asymmetric Waveform The output waveform of a welding power source that has the ability to modify both the amplitude and duration of the positive and negative half cycles of alternating current. Autogenous Weld When a TIG weld is made without the addition of filler metal. Automatic Welding AU

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