Working Principle of the Inductor:
The inductor is the 'energy conversion hub' of induction brazing. It converts electrical energy into thermal energy through the principle of electromagnetic induction to achieve precise heating:
1.Electrical energy → Magnetic energy: High-frequency current passes through the inductor coil, generating a rapidly changing alternating magnetic field.
2.Magnetic energy → Thermal energy: The magnetic field penetrates the metal workpiece, inducing internal eddy currents and hysteresis losses, causing the workpiece itself to heat up rapidly.
3.Precise temperature control: By adjusting the current frequency and power, the heating depth and temperature can be controlled (with an error of ≤ ±5℃).

The Core Functions of the Inductor

Precise Local Heating

Only the brazing area (such as the joint) is heated, avoiding overall temperature rise and reducing workpiece deformation, which is especially suitable for precision parts.

High Efficiency and Energy Saving

The energy directly reaches the target area, and the thermal efficiency is as high as over 80% (while traditional flame heating is only 30%).

Adaptability to Complex Shapes

Customized coil designs (such as spiral, flat, and contoured coils) can heat special structures like irregular parts, deep holes, and narrow slits.

Rapid Response

It only takes a few seconds to tens of seconds from startup to the target temperature, greatly improving production efficiency.

Key Design Elements of the Inductor

Elements	Design Key Points	Influence on Brazing
Coil Shape	Customize according to the workpiece shape (e.g.,use multi -turn spiral coils to heat pipe fittings)	Determine the heating uniformity and efficiency
Frequency Selection	Use high -frequency(100-450 kHz)for heating thin workpieces and medium -frequency(1-10 kHz) for heating thick workpieces	Control the heating depth (skin effect)
Cooling System	Install built -in water-cooled copper tubes to prevent the coil from overheating	Ensure the service life and stability of the equipment
Materials and Insulation	Adopt high -purity copper tubes with high -temperature- resistant ceramic/glass fiber insulation layers	Improve electrical conductivity and avoid short circuits

The Importance of the Inductor

Quality Assurance

Precise temperature control prevents base metal from overheating, ensures uniform flow of brazing filler metal, and reduces defects such as porosity and cold soldering.

Efficiency Revolution

The heating speed is 5–10 times faster than traditional methods, making it suitable for automated assembly lines (such as mass production of automotive parts).

Cost Optimization

It saves more than 50% energy, reduces the consumption of flux, and results in a lower overall cost.

Environmental Protection and Safety: Without open flames and smoke, it improves the working environment and conforms to the trend of green manufacturing.

Classic Application Scenarios

Brazing of air-conditioning copper tubes

The contoured coil surrounds the copper tube, and the circumferential seam can be uniformly heated within 10 seconds.

Welding of cemented carbide for cutting tools

The flat coil focuses on the tool tip to prevent the tool shank from being softened by heat.

Encapsulation of electronic components

The miniature coil precisely heats the soldering points to protect the surrounding precision circuits.

Summary in One Sentence

The inductor is the 'intelligent heat source commander' of brazing - it harnesses heat energy with magnetic fields, enabling fast, precise, and stable metal joining!

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