Technical Information

Direct Resistance Heating

Direct Resistance Heating

Direct Resistance Heating (DH) is a type of resistance heating that passes electric current directly though an electrically-conductive heated object to directly heat the object by Joule heat utilizing the internal resistance of object. Neturen’s original DH technology enables rapid hearing of materials such as wire and thin plates, thereby contributing to downsizing of heating equipment, improved heating efficiency and realization of a clean work environment.

Features

(1) Environmentally-friendly electric heating (Low level of CO2 emissions)
(2) High electric power-to-heat energy conversion efficiency (Reduction of heating consumption)
(3) Realization of high speed and space saving by rapid heating (Reduction in equipment costs)
(4) Shortened startup time by rapid heating (Schedule-free)
(5) Improved process flexibility by high controllability (Size schedule-free)
(6) Localized heating (Improved localized strength)
(7) Heating speed control, rapid heating (Structural refinement)

Application to continuous wire heating

DH technology that makes use of Neturen’s original ring transformer enables continuous wire heating.

Features

(1)Safe to products and human beings due to non-generation of voltage between electrodes
(2)Space saving due to compact structure

Applications

Quenching, annealing, hot forming, patenting

DH device for wire electrode of DH device for wire
DH device for wire electrode of DH device for wire

Application to rectangular thin plates

The DH device for rectangular thin plates is used as a heating device applying the hot press method
[Examples]
Door impact beams

Door impact beams

DH device for rectangular thin plates

Application to non-rectangular thin plates

Neturen has developed a new mobile electrode method that enables direct heating of non-rectangular thin plates, a process that was previously impossible. In addition, undertakings are underway to expand application to thin plates with more complex shapes and cross-sectional area changes.

Status of heating of non-rectangular thin plate (trapezoid)

Status of heating of non-rectangular thin plate (trapezoid)