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High-Quality AC Copper Pancake Tubing from China Suppliers and Factory for Efficient Welding Solutions
Product Description
1
Generation of the High-Frequency Magnetic Field
The copper tube is bent into a specific shape (usually a U-shape or helical coil), which is tightly wrapped around the weld seam area of the steel pipe to be welded. The inside of the copper tube is hollow.
High-current flows into this copper tube coil through water-cooled cables from the welder’s main power supply. Based on the principle of electromagnetic induction, there will be an intense and rapidly alternating magnetic field when the high-frequency current flows through the coil.
2
Induction of Eddy Currents in the Steel Pipe
This high-frequency magnetic field penetrates the steel pipe located at the center of the coil—especially around the V-shaped opening at the pipe edges.
On the basis of Faraday’s law of electromagnetic induction, the changing magnetic field generates eddy currents in the conductive material—especially the steel pipe. There will be intense induced currents, mainly focused on the surface and edges of the pipe.
3
Heat Generation via the Skin Effect
High-frequency current exhibits the skin effect, which means the current tends to be concentrated at the surface of a conductor.
Because of the skin effect, the powerful eddy currents generated at the edge of the steel pipe weld seam are concentrated in the extremely thin surface layer. The current flowing through the metal’s electrical resistance produces a great amount of Joule heat (I²R heat).
Within just a few milliseconds, this heat raises the temperature of the pipe edges to a molten or plastic state, suitable for welding.
4
Completion of the Welding Process
At this point, the heated pipe edges are squeezed under the strong pressure of the extrusion rollers. The molten metal at both edges fuses and solidifies, which forms a solid, continuous weld seam.
Why Copper Tubing Is Essential (Structural and Material Considerations)
Excellent Electrical Conductivity
Copper is one of the best conductors of electricity—second only to silver. Its superior conductivity to the largest extent reduces resistive losses, ensuring that a great amount of electrical energy is efficiently converted into magnetic field energy for welding.
Hollow Design for Water Cooling
This is the key design feature. Large currents flowing through the coil still generate enough heat although the copper has low resistance.
To keep the coil from overheating or burning out, cooling water persistently circulates through the hollow interior of the copper tube, which takes away heat in real time.
In this way, the coil is cooled while it operates, which ensures a safe and stable working temperature.
Summary of Function
The function of the copper tube component (induction coil) in a high-frequency pipe making machine is as a water-cooled conductor designed to carry high-frequency current and convert it into a highly concentrated high-frequency magnetic field. At the weld seam of the steel pipe, this magnetic field induces eddy currents, which generate the heat required for welding.
Parameters
| Product Name | Copper Tube/Pipe |
| Length | 1m, 3m, 6m, or as required |
| Packing | Standard Export packaging by Pearl cotton, molded paper sheet, plastic trays, shrink wrap, or as customer's request. |
| Payment | T/T |
| Specification | Any Size Can be Customized |
| Package | Standard Sea Worthy Package |
Packing & Delivery
Frequently Asked Questions (FAQ)
What is the primary role of the copper tube in high-frequency pipe welding?
The copper tube functions as an induction coil. It acts as a water-cooled conductor that carries high-frequency current, converting it into a highly concentrated alternating magnetic field to induce eddy currents and generate welding heat.
Why is copper preferred over other metals for the induction coil?
Copper is preferred because of its outstanding electrical conductivity, which is second only to silver. This minimizes resistive losses and ensures maximum electrical energy is converted into the magnetic field.
Why does the copper tube need a hollow design?
The hollow design allows cooling water to continuously circulate inside the tube. Since high-current flows generate substantial heat, this water-cooling system prevents the coil from overheating or burning out during operation.
How does the skin effect assist in the welding process?
The skin effect forces high-frequency currents to concentrate on the thin surface layer and edges of the steel pipe. This concentration increases localized resistance heating (Joule heat), raising the edge temperature to a molten state in milliseconds.
Can I customize the size and length of the copper tubes?
Yes, any size can be customized. The standard lengths available are 1m, 3m, and 6m, but they can be tailored to meet your specific requirements.
What packaging options are provided for delivery?
We offer standard seaworthy export packaging which includes Pearl cotton, molded paper sheets, plastic trays, shrink wrap, or customized packaging based on the customer's request.
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