Technical Information

Multi-frequency Heating Technology

Multi-frequency Heating Technology

Neturen has developed two types of multi-frequency heating technology that uses electric power with two frequencies (High and low) for use in its multi-frequency heating systems: The hot-switching (HSW®) method and the overlap (OLP®) method. Multi-frequency heating technology is applied to high-frequency heat treatment and makes it possible to tackle diverse heating issues previously regarded as being difficult to resolve with a single-frequency power supply. The HSW system in particular is capable of output while freely switching between two frequencies in micro-seconds (1000th of a second) and is a new multi-frequency heating system that makes high-precision, high-frequency heating possible through a wide diversity of heating effects (patented)

Hot-switching (HSW) system Overlap (OLP) system

Main Features

Hot-switching (HSW) system

  • The HSW system in particular is capable of freely switching between frequencies in micro-seconds (1000th of a second) during heating.
  • Adjusting the ratio of the alternatively output low and high frequencies and the output times makes it possible to adjust the quenching hardness layer and heating pattern.
  • Quenching at two locations is possible with no interference between coils mounted in close proximity.

Overlap (OLP) system

  • Capable of overlapping of high and low frequencies, the OLP system is realizes continuous multi-frequency effects.
  • Adjusting the heating power of the low and high frequencies makes it possible to adjust the quenching hardness layer and heating pattern.
  • Neturen’s original circuit configuration has enabled the realization of a simple system.

Examples of Application

・Contour quenching of deformed parts (gears, ring gears)
・Quenching of layers with different hardness (hollow drive shafts, rack bars)
・Dual-coil quenching (Simultaneous quenching at 2 locations)



Multi-frequency Multi-machine Quenching System

HSW Type

Connection of the HSW system multi-frequency power supply capable of realizing a wide range of frequency effects through high-speed switching of 2 different frequencies via a switch to multiple quenching machines enables the realization of quenching by each machine at ideal frequencies. (Patent pending)

Image

Image of multi-frequency multi-machine quenching system Example of manufacturing cycle

Example of manufacturing cycle

Multi-frequency multi-machine quenching system Example of manufacturing cycle