Kevlar Blanket

More welders Resort in induction heating for preheating, anti-stress

Traditional Applications of induction heating

- Welding

- Brazing

- Surface hardening

- Hardening
- Bonding

- Hardening
- Encapsulation
- Fusion
- Forging
- Super heat
- Growth of crystals

Although many industries have used for decades induction heating, is a newcomer in applications involving industrial and construction welding. Pre-heating before welding and anti-stress (ie postheating) after welding are new uses of induction heating, and companies with operations intensive weldiang have significantly increased efficiency as a result.

Induction heating: how it works

Induction heating systems use heat without contact. They induce electromagnetic heat rather than using a heater in contact with a party to conduct heat, as heat resistance. Induction heating acts more like a microwave oven, the unit remains cool while cooking the food inside.

In an example of industrial induction heating, heat is induced in part by placing it in a high frequency magnetic field. The magnetic field creates eddy currents within the party, the exciting part of molecules and heat production. Because the heating occurs slightly below the metal surface, no heat is lost.

similarity of induction heating for heat resistance is required is that the conduction of heat through the section or part. The only difference is the heat source and temperature of the tool. The process of induction heating in the process of resistance and heat on the surface of the workpiece. Depth of heating depends on the frequency. high frequency (eg 50 kHz), near the surface warms, while the low frequency (eg 60 Hz) penetrates deeper into the room, place the heating source up to 3 mm deep, allowing space heating thicker. The induction coil does not heat up because the driver is great for the current year. In other words, the coil does not need heat to heat the room.

system components for induction heating

Induction heating systems can be air or liquid depending on application requirements. A key element common to both systems is the induction coil used to produce heat in the room.

air cooling system

A typical air-cooled consists of a power source (5 kW or 25 kW), a blanket of induction, and associated cables. Cover induction consists of an induction coil surrounded by insulation and sewn into a high temperature, replaceable Kevlar sleeve. This type of induction system may include a controller to monitor and automatically control the temperature. A system that is not equipped with a controller requires the use of a temperature gauge. The system could also include a switch-off distance. air-cooled systems can be used for applications up to 400 degrees F, designating it as a pre-heating system alone.

liquid cooling system

Because liquid cools more efficiently than air, this type of induction heating system can be used for applications requiring higher temperatures, such as preheating at high temperature and relaxation. The main differences are the additions.