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SMAW welding(shielded metal arc welding)

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SMAW (shielded metal arc welding) is the most widely used in industrial production welding method, it is the use of an arc discharge (commonly known as the arc burning) heat generated melts the electrode and the workpiece with each other and form a weld after condensation, thereby obtaining a solid welded joints process.

The process is normally limited to the flat or horizontal-fillet welding positions (although horizontal groove position welds have been done with a special arrangement to support the flux).

SMAW electrodes are manipulated by hand welding work can be welding, vertical welding, horizontal and overhead welding and other welding position welding. In addition, as SMAW equipment lightweight, nimble handling, so that the SMAW welding operations can be performed in any place of power. Applicable to all kinds of metal materials, various thickness, various structural shapes welded.

SMAW safety features: the load voltage SMAW welding equipment typically 50V-90V, while the body can withstand voltage is safe 30V-45V, shows that manual arc welding equipment, would have caused life danger, when welding, must wear good protective clothing. Arc welding can be divided into SMAW, semiautomatic (Arc) welding, automatic (arc) welding. Automatic (Arc) welding usually refers to automatic submerged arc welding - covered with a protective layer of flux welding parts, light wire is inserted into the filler metal solder layer metal arc welding, flux arc buried under layers melting heat generated by the arc welding wire, solder and the base metal formed weld, the welding process is automated. The most commonly used is the SMAW.

One of the limitations is SMAW welding speed, it is subject to periodic welder stop welding, to replace a length of 9-18 inches rod limit. SMAW have been other semi-mechanization and automation of welding processes are replaced in many applications, the reason is that these processes are compared with the SMAW, have higher productivity. Another drawback SMAW also affect productivity, clean up after welding welding slag. Also, when using low hydrogen electrodes, also need to have adequate storage facilities, such as a low oven to keep it moist degrees.

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