Hot Products
0102030405
China Quality Assurance Copper Pancake Tubing Suppliers - Factory Direct U-Shape & Helical Coil Solutions
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 an 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.
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 skin effect, the powerful eddy currents which are generated at the edge of the steel pipe weld seam are concentrated in the extremely thin surface layer. As the current flows through the metal’s electrical resistance, there will be 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.
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 the 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 reduces resistive losses, ensuring that a 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. When large currents flow 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 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 to act 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
How is the high-frequency magnetic field generated in the welding process?
The high-frequency magnetic field is generated by passing a strong alternating current from the welder's main power supply through a specially shaped, hollow copper tube coil wrapped around the steel pipe's weld seam.
What role do eddy currents play in heating the steel pipe?
Based on Faraday's law of electromagnetic induction, the changing magnetic field induces powerful eddy currents focused on the surface and edges of the conductive steel pipe, generating the intense heat needed for welding.
What is the skin effect and why is it important?
The skin effect causes high-frequency current to concentrate at the outer surface of a conductor. In welding, this concentrates the induced eddy currents within an extremely thin surface layer at the weld seam, producing rapid Joule heat (I²R heat) to melt the edges within milliseconds.
Why is copper the preferred material for induction coils?
Copper has excellent electrical conductivity (second only to silver), which minimizes resistive losses and ensures that electrical energy is efficiently converted into magnetic field energy.
Why do the copper tubes require a hollow design?
The hollow design allows cooling water to continuously circulate through the inside of the copper tube. This dissipates heat in real time, preventing the induction coil from overheating or burning out during high-current operations.
Can the specifications and lengths of the copper tubes be customized?
Yes, the copper tubes can be customized in any size and length (such as 1m, 3m, 6m, or other specific dimensions) based on customer requirements.
Inquire Now!
For inquiries about our products or pricelist, please leave your email to us and we will be in touch within 24 hours.