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High-Frequency Soft Welding Tube Ferrite Rod - China Suppliers & Factory for Efficient Pipe Mill Machines
Product Description
1
Main Components of a High-Frequency Welded Pipe Mill:
A Hf welding pipe mill machine mainly consists of the following parts: a high-frequency (coil), the steel tube to be welded, a ferrite rod (magnetic rod), squeeze rolls, and a water cooling system.
2
Working Principle of the High Frequency Ferrite Core:
Its operation follows a strictly electromagnetic induction principle: When high-frequency current flows through the induction coil, a high-frequency alternating magnetic field is generated. As a high-permeability magnetic path, the magnetic rod which is placed inside the pipe actively guides and concentrates the magnetic flux lines, focusing them precisely along the weld seam edges. At this location, strong eddy currents are induced by the dense magnetic flux, instantly generating heat sufficient to melt the metal. The squeeze rolls then apply pressure to finish the welding process.
3
Magnetic Permeability Requirements for the Magnetic Rod:
To effectively increase the magnetic flux in the induction coil, the magnetic rod must have a high magnetic permeability. Since permeability is a function of the magnetic field strength H, it is particularly required to be high within the range of magnetic fields used in the welding process. Because most welding machines operate under relatively low magnetic field strength, the initial permeability is typically used as a measure of this property.
When the alternating magnetic field generated by the coil becomes too strong, the magnetic rod can reach magnetic saturation. At this point, if the alternating magnetic field continues to increase, the magnetic rod will lose its efficiency for further increase. Therefore, for large-power pipe welding units, it is necessary to pay attention to using magnetic rods with high saturation flux density (also known as saturation magnetic induction strength).
Specification
| Initial permeability | 800±25% |
| Saturation magnetic flux density | ≧320mt |
| Core loss | 28-30mw/g |
| Curie temperature | ≦300℃ |
| Resistivity | 10^6 Ω/cm^2 |
| Material | Mn-Zn ferrite |
| Material density | 4.85g/cm3 |
| Grade | Mn-Zn ferrite |
| Delivery Time | within 7 days |
Temperature characteristics of magnetic permeability
Packing & Delivery
Frequently Asked Questions
Q1: What are the main components of a high-frequency welded pipe mill?
A1: A high-frequency welding pipe mill machine mainly consists of a high-frequency induction coil, the steel tube to be welded, a ferrite magnetic rod, squeeze rolls, and a water cooling system.
Q2: How does the high-frequency ferrite core assist in the welding process?
A2: The ferrite rod acts as a high-permeability magnetic path that concentrates the magnetic flux lines along the weld seam edges. This induces strong eddy currents, generating sufficient heat to melt the metal for welding.
Q3: Why is high initial permeability important for the magnetic rod?
A3: High permeability effectively increases the magnetic flux in the induction coil. Since welding machines often operate under low magnetic field strength, high initial permeability is required to ensure efficient induction.
Q4: What happens if the alternating magnetic field becomes too strong for the magnetic rod?
A4: If the field is too strong, the magnetic rod can reach magnetic saturation, losing its efficiency to increase the magnetic flux further. For large-power units, rods with high saturation flux density (≧320mt) are essential.
Q5: What are the key material specifications of this Mn-Zn ferrite rod?
A5: It features an initial permeability of 800±25%, saturation magnetic flux density of ≧320mt, core loss of 28-30mw/g, Curie temperature of ≦300℃, and resistivity of 10^6 Ω/cm^2.
Q6: What is the delivery time for the Mn-Zn ferrite rods?
A6: The standard delivery time for these high-frequency soft welding tube ferrite rods is within 7 days.
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