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China Quality Assurance Copper Pancake Tubing Suppliers and Factory for Welding Applications
Product Description
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 copper tube is hollow.
High-current flow 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 a intense and rapidly alternating magnetic field when the high-frequency current flows through the coil.
High-current flow 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 a intense and rapidly alternating magnetic field when the high-frequency current flows through the coil.
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 steel pipe. There will be intense induced currents, mainly focused on the surface and edges of the pipe.
On the basis of Faraday’s law of electromagnetic induction, the changing magnetic field generates eddy currents in the conductive material—especially steel pipe. There will be intense induced currents, mainly focused on the surface and edges of the pipe.
Heat Generation via the Skin Effect
High-frequency current exhibits the skin effect, which means the current tends to concentrated at the surface of a conductor.
Because of skin effect, the powerful eddy currents which 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, there will be a great number 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.
Because of skin effect, the powerful eddy currents which 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, there will be a great number 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.
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)
The reasons why the copper pipe is preferred material are as follows:
Excellent Electrical Conductivity
Copper is one of the best conductors of electricity—second only to silver. Its superior conductivity to the largest extent reduce resistive losses, ensuring that the great number 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, it still generates 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 operate a safe and stable working temperature.
Summary of Function: It is a water-cooled conductor which is 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 generates the heat required for welding.
Parameters
| Product Name | Copper Tube/Pipe |
| Length | 1m,3m,6m,or as required, 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)
Why is copper the preferred material for high-frequency induction welding coils?
Copper is selected due to its exceptional electrical conductivity, which is second only to silver. This high conductivity minimizes electrical resistance and energy loss, ensuring that the maximum amount of electric current is efficiently converted into the magnetic field required for welding.
What is the purpose of the hollow design inside the copper tube?
The hollow design allows cooling water to constantly circulate through the inside of the copper tube. Because the coil carries extremely high electrical currents, it would quickly overheat and burn out without active cooling. The circulating water absorbs and removes this heat in real-time, keeping the system at a safe operating temperature.
How does the skin effect benefit the welding process?
The skin effect causes high-frequency alternating currents to concentrate primarily on the outer surface of conductors. In welding, this concentrates the induced eddy currents at the very edges of the steel pipe's V-shaped opening. This localized resistance creates rapid Joule heat, melting only the seam area within milliseconds for a precise weld.
Can the copper tubing be customized to specific sizes?
Yes. We offer fully customizable specifications. Any size, shape, or length of copper tube can be custom manufactured to meet the specific structural requirements of your high-frequency pipe making machines.
What packaging methods are used for shipping to prevent damage?
We use standard seaworthy export packaging to ensure the tubes remain undamaged. This includes the use of pearl cotton, molded paper sheets, plastic trays, and secure shrink wrapping. Custom packaging can also be arranged upon request.
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