Induction coil

✅ 4. Comparison of Induction Coil Types for HF Welding

📌 Selection Tips

• Small pipes (<50 mm): Spiral coil is recommended for its simplicity and cost-effectiveness.

• Medium pipes (50–150 mm): U-shaped coils offer efficient, focused heating.

• Large or irregular pipes (>150 mm): Saddle coils cover a wider area and handle complex profiles.

• High-efficiency requirements: Ferrite core coils help reduce energy loss and improve heat focus.

• Versatile production lines: Adjustable coils are ideal for lines requiring flexibility in pipe diameters.

✅ 5. Working Principle

1. The HF generator sends current to the induction coil.

2. A strong high-frequency magnetic field is created around the coil.

3. As the pipe passes through the coil, eddy currents are induced at the edge surfaces.

4. These currents generate localized heat at the pipe’s seam (skin effect + proximity effect).

5. When the pipe edges reach the fusion point, squeeze rollers press them together to form a solid weld without filler material.

✅ 6. Technical Parameters (Typical Values)

✅ 7. Summary

• The induction coil is a key part of HF welding, enabling non-contact, high-speed seam welding for pipe production.

• Coil shape and size are customizable to match pipe diameter and welding specifications.

• High durability, excellent thermal conductivity, and magnetic field efficiency are critical for stable, continuous production.

• Proper cooling and maintenance significantly extend coil life and welding consistency.

1. Enter Section Equipments
2.  
3. 1. Coil car and Storage
4. 2.Single And Double Heads Un-coiler & Hydraulic And Pneumatic Un-coiler
5. 3.Peeler and hold down roll arm
6. 4.Flattening Machine
7. 5.Automatic and Semi Auto Shearer & Butt Welder
8. 6.Vertical Cage Accumulator​ & Horizontal Loop Accumulator & Landing Horizontal Spiral Loop Accumulator
   

1.  
2. 1. Machine à courants de Foucault
3. 2. Machine de recuit des joints
   
4. 3. Machine à lisser
   
5. 4. Machine à chanfreiner et à surfacer les extrémités
   
6. 5. Machine de test hydraulique
   
7. 6. Machine à fileter
   
8. 7. Machine à peindre et à huiler
   
9. 8. Machine automatique de mise en paquets et d'emballages

1.  
2. 1. Rollers, Moulds, Dies, D2,D3 material to choose
3. 2. Ferrite, Impédance, Tube en fibre de verre
   
4. 3. Lames de scie HSS, Lames de scie TCT, Lames de scie à friction
   
5. 4. Inserts pour éliminer les bavures OD, inserts pour éliminer les bavures ID
   
6. 5. Bobine d'induction pour soudeuse HF et autres pièces de rechange pour soudeuse HF
   
7. 6. Tube en cuivre pour bobine d'induction, tube en PTFE pour bobine d'induction
   
8. 7. Mosfet, cartes
   
9. 8. Cercleuse pour tubes en acier
   
10. 9. Machine de pulvérisation de zinc, fil de zinc, pistolet de pulvérisation de zinc

1. Pourquoi nous choisir?
   

2. 1.Leading Technology, Reliable Quality, Excellent Service! Conception optimisée, sélection de matériaux de haute qualité !  Garantie du processus de traitement thermique !

3. 2.Spiral bevel gear, drum gear coupling and carburization. Trempe des dents d'engrenages. Système d'entraînement stable, efficace et portable avec moins de bruit.

4. 3.High precision wear resisting and Long life of toolings. Tous les tours mécaniques, les rainures de clavette sont positionnés et fraisés par CNC.

5. 4.Quality department make sure the material of the raw materials quality, and ensure the machine running perfect.

Service après-vente

1. 1.Machine test running videos will supply to customer before shipment.
2. 2.Online techenical support WHOLE LIFT FREE.
   
3. 3.Professional engineers team to install the machine,  train your employee well.
   
4. 4.One year warranty and life-long technical support.
   
5. 5,24 heures pour l'intervention de l'ingénieur.
   
6. 6. Votre relation commerciale avec nous sera confidentielle envers tout tiers.
7. 7.  We welcome customers to visit our factory anytime.