Remscheid, Germany
Remscheid, Germany

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Dappen S.,SMS Elotherm GmbH | Dawidowicz M.,SMS Elotherm GmbH | Reese G.,Harterei Reese Bochum GmbH
Elektrowaerme International | Year: 2016

Complex workpieces and extensive prototypes require a special detailed engineering. This paper gives a brief overview about several process techniques which can be used in induction hardening and describes in detail an electromagnetic thermal coupled simulation. The computational mechanical engineering with ANSYS 17.0 was done for a complex inductor geometry which was used to harden big excavator chains. The simulated inductor was built and installed in one of the flexible hardening machines of Harterei Reese Bochum GmbH where a chain was hardened and evaluated. These results were used to validate the simulation.


Krammer H.,SMS Elotherm GmbH | Langejurgen M.,SMS Elotherm GmbH | Sprung C.,SMS group GmbH
Elektrowaerme International | Year: 2016

Because of the energy transition the use of electrical energy and fossile energy for industrial thermal processes is discussed intensively. Even if both heating concepts are looking completely different, they are usually pursuing identical objectives. A required temperature with a precise predictable uniformity has to be reached. For metallurgical reasons often a defined soaking time is required subsequently after heating as well. Traditionally gas fired furnaces are often used in industrial thermal treatment. Modern technologies with alternative heating concepts are rarely considered. Hybride heating concepts are not only superior in respect to quality and energy costs, by intelligent combination of these concepts, completely new process sequences are possible. Advantages of solutions with combined hybride heating concepts are shown.


Opezzo G.,SMS Elotherm GmbH | Schibisch D.M.,SMS Elotherm GmbH
Elektrowaerme International | Year: 2012

Induction quench and temper (Q&T) has now become firmly established practice, particularly in applications that require precise, fast, flexible and repeatable heat treatment of tubular and bar material. A process in successful use for heat treatment of bar material for many years, induction quench and temper has recently been extended to cover tubular products. The new processes developed include technologies for pipes with upset ends, creating special demands on the induction heating processes used.


Bender C.,SMS Elotherm GmbH | Engel A.,SMS Elotherm GmbH | Schibisch D.M.,SMS Elotherm GmbH
Elektrowaerme International | Year: 2015

Frequency converters are electronic devices or systems that convert electric power with specific parameters (voltage current, frequency, phases) into electric power with other parameters, required e.g. for induction heating. Therefore, these power supplies play an important role in advanced thermoprocessing plants for both energy efficiency as well as overall costs. The use of modern silicon carbide (SiC) devices provide remarkable advantages over conventional silicon (Si) components, especially with regard to power dissipation, size and weight as well as reduction of heat dissipation of the semiconductors.


Dappen S.,SMS Elotherm GmbH | Amiri F.,SMS Elotherm GmbH
Elektrowaerme International | Year: 2015

For increasing the vibration and torsion resistance as well as for improved wear resistance of highly stressed steel and cast components, induction hardening is widely-used. This article gives the reader an understanding of several procedural aspects of induction hardening from practical experience, which regularly play a decisive role when it comes to the coordination of hardening requirements on the one hand and their conversion into process requirements on the other.


Brill S.,SMS Elotherm GmbH | Schibisch D.M.,SMS Elotherm GmbH
Elektrowaerme International | Year: 2014

Reducing fleet consumption in the automotive industry or service free operation of components in offshore wind mills during lifetime - all depends on the quality of the components used, Especially the heat treatment, here the surface hardening, plays an important role, on the one hand for keeping geometrical dimensions as small as possible, on the other hand for boosting the component's resistance to ever increasing loads. In times of growing international competition among the manufacturers of such components, an intelligent manufacturing technology is an essential asset. This article compares the traditional process of case hardening with induction hardening and proves that the induction technology mainly is advantageous when it comes to the integration into manufacturing lines, high productivity, energy and resource saving production, flexibility of the material selection and reproducibility of the hardening results.


Schibisch D.M.,SMS Elotherm GmbH | Alte F.,SMS Elotherm GmbH
Welding and Cutting | Year: 2012

The most relevant induction processes for tube plants are discussed, starting from the initial induction welding to various partial or full body heat-treatment processes for achieving better qualities. Easily replaceable standard modules with a single MOSFET or IGBT are used instead of expensive power units in the form of compact modules with many transistors. The digitally configurable converter features modern diagnostics and visualization with online status and fault indications in plain text. Separation of the converter from the external resonant circuit offers additional decisive advantages. The external resonant circuit contains no unprotected electronic power units liable to cause problems due to vibration and moisture. There are no sensitive components, such as transistors or driver boards, in the direct vicinity of the welding line.


Patent
Sms Elotherm Gmbh | Date: 2010-09-09

A device is provided having at least one inductor for the inductive heating of a zone formed in a metallic workpiece, which zone is adjoined by a narrow material portion which is to be protected against heating up. To enable two tracks or ways arranged next to one another to be heated simultaneously without the portion of material situated between the tracks or ways being heated throughout to this temperature in the process, the invention provides a cooling means which delivers a cooling fluid onto that material portion of the workpiece which is to be protected against heating up. The device is particularly suitable for the simultaneous inductive heating of two tracks or ways which are formed on a workpiece next to one another and at a distance from one another and which are separated by a narrow material portion.


The invention relates to a device for hardening the surface F of a cylindrical workpiece section Z which has an undercut H1, H2, the device having an inductor 2 which has a heating conductor branch 26 extending in the circumferential direction of the surface F to be hardened for inductive heating of the section Z, a control instrument 35, 36 for pressing the heating conductor branch 26 into the undercut H1, H2, and an energy supply 3 which electrically supplies the inductor 2. In order to achieve an improved working outcome by such a device with a reduced equipment outlay, the invention proposes that the inductor be divided into an energy supply part 5 connected to the energy supply 3, and a working part 6, 7 which comprises the heating conductor branch 26 and is coupled to the control instrument 35, 36 which displaces the working part 6, 7 relative to the surface F to be hardened and relative to the energy supply part 5, and that a transmission unit U be provided which transmits the electrical energy required for the inductive heating of the surface F contactlessly from the energy supply part 5 to the working part 6, 7 of the inductor 2.


Patent
Sms Elotherm Gmbh | Date: 2010-09-09

An inductor is provided for the simultaneous inductive heating of two tracks or ways which are formed next to one another on a metallic workpiece, having a first segment which is associated with the first track or way and a second segment which is associated with the second track or way, and having two supply arms via which the segments can be connected to a power supply. To enable two tracks or ways to be heated simultaneously to the hardening temperature without heating the material portion situated between the tracks or ways the segments of the inductor and the supply arms are connected together in an inductor in such a way that the fields travelling at right angles to the longitudinal extent of the tracks or ways neutralize each other in the region of the material portion which separates the tracks or ways from one another.

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