Medium frequency bending of pipe

Medium frequency tube bending machine USES medium frequency induction heating to bend the workpiece under the condition of local heating.It is widely used in pipeline prefabrication in electric power, petroleum, chemical industry, navigation, nuclear industry and other engineering fields.

Intermediate frequency bend is stay in steel pipe bending part set in the process of induction coil, mechanically pivoted arm stuck pipe head, zhongtong into the intermediate frequency induction coil current heating tube, when the steel tube temperature to the plastic state, after the steel pipe end with mechanical thrust forward, bending, bending of making steel pipe section with coolant cooling rapidly, so that heating, while advancing, bending, while cooling, constantly to bend pipe bending.

application

Intermediate frequency bend is currently widely used in electric power, petroleum, chemical industry, navigation, nuclear industry and other projects in the field of piping prefabrication, but medium frequency bend in striking place fold obvious big waves, especially the bending radius is less than 3 Do (Do) for the tube diameter, the inner arc fold larger waves, the serious influence the appearance of the product quality, this is for decades domestic pipe bender can't solve problems that also need.

The characteristics of

1. The medium frequency bending tube adopts vertical external characteristic power supply, and the positive polarity (welding wire is connected to the negative electrode) is adopted in dc.

2. Medium frequency bending pipe is generally suitable for the welding of thin plates below 6mm, with the characteristics of beautiful weld formation and small welding deformation.

3. The shielding gas is argon gas with a purity of 99..When the welding current is 50-50a, the argon gas flow is 8-0l /min; when the current is 50-250a, the argon gas flow is 2-5l /min.

4. Welding arc length: when welding ordinary steel, 2-4mm is preferred; when welding stainless steel, ~3mm is preferred; when welding too long, the protective effect is not good.

5. In order to prevent the appearance of welding pores, if there is iron rust and oil stain, the welding parts must be cleaned.

6. The length of the tungsten electrode protruding from the gas nozzle is 4-5mm, and the distance between the nozzle and the working nozzle is generally not more than 5mm.

7. To prevent oxidation of the back of the bottom weld bead, gas protection is also required on the back of the middle frequency bend when it is buttoned.

8. Windproof and ventilation.The place that has wind, wu asks to take the measure that block a net, and indoor should take appropriate breath measure.

9. Intermediate frequency bend for the argon gas protection welding molten pool very well, and facilitate the welding operation, the center line of the tungsten electrode and welding workpiece generally should maintain 80 ~ 80 ° Angle, Angle of filler wire and workpiece surface should be as small as possible to 0 ° or so commonly.