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    Medium frequency bending characteristics

    Medium frequency bending characteristics
    1. Medium frequency  pipe bending machine adopts the power source with vertical external characteristics, while the direct current adopts the positive polarity (welding wire to negative electrode).
    2. Medium frequency  pipe bending machine is generally suitable for the welding of thin plate under 6mm, with the characteristics of beautiful weld forming and small welding deformation
    3. The shielding gas is argon with a purity of 99.99%. When the welding current is 50~50A, the argon flow is 8~0L/min, and when the current is 50~250A, the argon flow is 2~5L/min.
    4. The arc length of welding is 2~4mm for common steel, and 3mm for stainless steel, but too long is not good for protection.
    5. In order to prevent the appearance of welding holes, the welding parts must be cleaned up if there is rust and grease.
    6. The length of the tungsten pole protruding from the gas nozzle is 4~5mm, which is better. It is 2~3mm in areas with poor shielding such as fillet welding, and 5~6mm in places with deep grooves.
    7. Gas protection should also be implemented on the back of the bottom pass to prevent oxidation of the back of the bottom pass when the medium frequency bend butt is laid out.
    8. Windbreak and ventilation. In windy areas, take precautions to block the net, and take proper ventilation measures indoors.
    9. In order to protect the welding pool with argon gas and facilitate welding operation, the Angle between the center line of tungsten pole and the workpiece should be maintained at 80~85°, and the included Angle between the filling wire and the surface of the workpiece should be as small as possible, usually around 0°.
    The surface Angle should be as small as possible, generally about 0°.