How to produce HH-type finned tubes/Double H finned tubes?
Data：2024-03-04 Author:Fin tuberadiator Views：136How to produce HH-type finned tubes/Double H finned tubes?
HH-type finned tubes is almost same production method. The fins formed by stamping and shearing of the steel plate are manually coded into the sheet automatic unloading hopper, and the feeding cylinder realizes automatic unloading. At the same time, Both steel pipes are transported to the welding position, and the horizontal pushing cylinder pushes the electrode clamping mechanism to realize automatic welding. The electrode clamping mechanism is the key part of the welding machine, and the electrodes on both sides are equipped with material receiving and pneumatic positioning mechanisms. And it is pushed centripetally by the push cylinder, and the fins automatically enter the welding position, clamping and welding, and realize the welding of the fins on both sides and the steel pipes. After the welding is completed, the clamping is released, the finned tube is manually removed, and the steel tube moves forward. The parallel automatic welding of steel pipes and fins can well meet the quality and efficiency requirements of finned tube welding.
HH-type finned tube/Double H finned tubes material and size:
Base Tube O.D (mm) | Base Tube Thickness (mm) | Fin Height (mm) | Fin Thickness (mm) | Fin Pitch (mm) | ||
25.4 mm ~50.8 mm | 2.5 mm ~5.0 mm | 50 mm ~200 mm | 0.5 mm ~3.0 mm | 5 mm ~ 25.4 mm | ||
Base Tube Material | Fin Material | Tube Length (Mtr) | ||||
Carbon Steel ,Alloy Steel ,Stainless Steel, ND steel | Carbon Steel ,Alloy Steel ,Stainless Steel, ND steel | ≤ 15Mtrs | ||||
HH-type finned tube/Double H finned tubes product advantages:
1. The new finned tube welding process is adopted, and the contact of the fin welding part adopts multiple zigzag shapes, so that the fin welding is firm, the welding shape is uniform, the surface is smooth, there is no slag inclusion, pore welding, and the penetration rate reaches 97%.
2. The welding position adopts multiple zigzag methods, which is equivalent to reducing the local stiffness of the finned tube, thereby reducing the amount of compressive plastic deformation generated during the welding process, reducing the longitudinal residual tensile stress near the weld, and also greatly The residual compressive stress of the sheet away from the weld is reduced, so the wave deformation of the sheet is significantly reduced.
3. The penetration rate is 97%, the surface of the weld seam is uniform and smooth without welding bumps, and the expansion of the heating surface can increase the heat transfer coefficient.
4. The extended heating surface unit has a self-cleaning function, which can slow down the deposition, blockage and wear of soot on the heating surface, especially slowing down the wear can ensure a reasonable service life of the heating surface.