1. The intermediate frequency elbow adopts the power supply with vertical external characteristics, and the positive polarity is used in DC (the welding wire is connected to the negative electrode).

2. Medium frequency bending pipe is generally suitable for welding of thin plates under 6mm. It has the characteristics of beautiful weld forming and small welding deformation

3. Protective gas is argon, with purity of 99.99%.When the welding current is 50~50A, the flow rate of argon is 8~0L/min, and when the current is 50~250A, the flow rate of argon is 2~5L/min.

4 welding arc length, welding ordinary steel, with 2~4mm is the best, and welding stainless steel, with ~3mm is the best, too long the protection effect is not good.

5. In order to prevent the appearance of welding pores, the welding parts, such as rust and oil, must be cleaned up.

6. The length of the tungsten electrode protruding from the gas nozzle is 4~5mm. It is 2~3mm in the place of poor shielding, such as fillet welding, and 5~6mm in the place of deep grooving.

7. In order to prevent the back of the bottom pass from being oxidized, the back side also needs to be protected by gas when the middle frequency elbow is butt butt.

8. Windproof and ventilation.In windy areas, always take measures to stop the net, and take appropriate ventilation measures indoors.

9. In order to protect the welding pool well with argon gas and facilitate the welding operation, the Angle between the center line of tungsten electrode and the workpiece at the welding place should generally be maintained at 80~85°, and the Angle between the filler wire and the workpiece surface should be as small as possible, generally about 0°.

Edit the features of medium frequency pipe bender

This process can avoid the uneven phenomenon of pipe bend wall thickness caused by the tension thinning of the convex edge of pipe wall and the compression thickening of the concave edge of pipe wall.

By using this process, 180 elbow with uniform wall thickness of small radius (R≈D) and thin wall (T /D≈0.015) can be produced, which cannot be achieved by other bending processes.

If the design of various technological parameters is reasonable, the thickness of the pipe wall in each part of the bending pipe forming process can be kept constant, that is, it is always equal to the thickness of the straight pipe before deformation.

The process can be used to produce 45°, 90°, 180° and other bending angles of the same caliber with the same horn mandrel at one time, and the production efficiency is high.

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