Application and characteristics of induction welding
Release time:
2023-07-09
【Summary Description】 Induction brazing is a welding method using high frequency, medium frequency or power frequency induced current as a heat source. Its main feature is that the workpiece is heated by the resistance heat of the induced current generated in the alternating magnetic field of the alternating current. Specifically, the conductive workpiece is placed in a changing electromagnetic field, and the induction heating power supply provides a changing current to the single-turn or multi-turn induction coil to generate a magnetic field. When the workpiece is placed between the induction coils and enters the magnetic field, eddy currents enter the interior of the workpiece, producing precisely controlled local heating. Induction heating brazing is to place the brazing part of the part in an alternating magnetic field, and realize the heating of the base material through the resistance heat of the induced current generated in the alternating magnetic field. The strength of the induced current in a conductor is proportional to the frequency of the alternating current. As the frequency of the alternating current used increases, the induction current increases and the heating speed of the weldment becomes faster. When an alternating current passes through a conductor, the current density on the surface of the conductor is large, and the current density inside the conductor is small. When high-frequency current passes through the conductor, the current density difference on the conductor section increases, and the current is mainly concentrated on the surface of the conductor, which is the so-called skin effect. Because induction heating brazing adopts the heating method from inside to outside, unlike laser heating brazing, its effect is not affected by the change of brazing position or joint. Induction heating soldering can provide faster and more uniform heating than soldering with a soldering iron. The soldering iron tip will wear out and need to be replaced frequently, while the induction coils are actually wear-free because they are non-contact. There are many advantages to replacing gas flame brazing with induction heating. It can conduct more heat per unit area of material. The brazing temperature can usually be reached in a few seconds, which makes the heating cycle shorter and improves the yield.
Induction brazing is a welding method using high frequency, medium frequency or power frequency induced current as a heat source. Its main feature is that the workpiece is heated by the resistance heat of the induced current generated in the alternating magnetic field of the alternating current. Specifically, the conductive workpiece is placed in a changing electromagnetic field, and the induction heating power supply provides a changing current to the single-turn or multi-turn induction coil to generate a magnetic field. When the workpiece is placed between the induction coils and enters the magnetic field, eddy currents enter the interior of the workpiece, producing precisely controlled local heating. Induction heating brazing is to place the brazing part of the part in an alternating magnetic field, and realize the heating of the base material through the resistance heat of the induced current generated in the alternating magnetic field.
The strength of the induced current in a conductor is proportional to the frequency of the alternating current. As the frequency of the alternating current used increases, the induction current increases and the heating speed of the weldment becomes faster. When an alternating current passes through a conductor, the current density on the surface of the conductor is large, and the current density inside the conductor is small. When high-frequency current passes through the conductor, the current density difference on the conductor section increases, and the current is mainly concentrated on the surface of the conductor, which is the so-called skin effect. Because induction heating brazing adopts the heating method from inside to outside, unlike laser heating brazing, its effect is not affected by the change of brazing position or joint.
Induction heating soldering can provide faster and more uniform heating than soldering with a soldering iron. The soldering iron tip will wear out and need to be replaced frequently, while the induction coils are actually wear-free because they are non-contact. There are many advantages to replacing gas flame brazing with induction heating. It can conduct more heat per unit area of material. The brazing temperature can usually be reached in a few seconds, which makes the heating cycle shorter and improves the yield.
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