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ZMAG CM

Powerful demagnetization unit for components

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Effective demagnetization by pulse method

Magnetized components can lead to all sorts of problems
in the production process. For example, during grinding,
punching or drilling, metal chips and debris may be
present, which can lead to surface damage in subsequent
processes. Or interfering signals arise due to remanence
during the crack or structure test with eddy currents. This
in turn leads to incorrect statements about the component
condition and false results are given.

To avoid this from happening, FOERSTER offers you an appropriate
solution: the powerful demagnetization unit ZMAG
CM.

Unlike other units, the ZMAG CM does not use a continuous
signal but the so-called pulse method. This enables
a higher penetration depth to demagnetize the components
effectively and quickly. We deliver the ZMAG CM already
preconfigured, so that you do not need to make any further
adjustments. In addition, the Siemens control system
allows easy integration into your production process. Increase
your process quality and reliability now.
Applications
Viele Arten von Metalldetails Industriedesign Hintergrund

Your advantages at a glance  

  • Pulse method: The pulse method allows a greater penetration of the component than at a constant frequency.
  • Flexible spool size: Choose from the four standard sizes 30 / 75 / 110 / 220 mm. We manufacture individually on request. 
  •  It can be automated: I/O interface for control available. The demagnetization can be triggered manually via remote control.
  • Plug & Play: The demagnetization unit is preconfigured by us. This way, you can easily integrate the module into your process and start right away.
  • High demagnetization performance: Powerful pulse shape for effective demagnetization.
ZMAG CM Flyer
Titelbild_Final

The pulse method

The ZMAG CM magnetization unit is operated with the pulse method. An approach that uses an alternating current pulse that flows through an appropriate coil. As a result, an alternating magnetic field that corresponds to the current is generated.

Components are positioned in the coil for subsequent demagnetization. The pulse can be triggered automatically via the connection to the PLC. This can also be done manually with a remote control. With complex geometries of the components it may be necessary to trigger the pulse several times while changing the components’ position. This ensures the thorough demagnetization of the component.
ZMAG_Winkel_2_Blau_

Pulse method with progressive frequency
Entmagnetisierung--mit-50Hz-Verfahren
Entmagnetisierung-mit-Pulsverfahren
handle
Slide to reveal
Spulen_Gruppe

The demagnetization

The ZMAG CM degaussing unit is preconfigured according to the coil and the component. The current is fed based on a programmed demagnetization curve. The current pulse is reproducible and independent of the operator of the system.

The pulse method enables high field strengths due to the comparatively low heat generation. This allows for a greater penetration depth than with a constant frequency. As a result, the residual magnetization is significantly lower in contrast to a continuous signal.
Spule_Medium_2

Applications

Elimination of misinterpretations
1
False signals during microstructure testing
2
Use in magnetic particle testing
3
Magnetic adhesion of metal chips
4
Coating processes
5
Compliance with manufacturing standards
6

Elimination of misinterpretations
Elimination of misinterpretations in crack detection
Sorting during crack detection

Magnetized components can cause interference signals during eddy current-based crack detection. The result: good parts are incorrectly marked, and pseudo rejects occur, leading to lost profits. If early component demagnetization is carried out early; this issue can be effectively prevented.

False signals during microstructure testing
Incorrect evaluation during microstructure testing
Sorting during microstructure testing

In microstructure testing via eddy current, the magnetic properties of a component are primarily checked. Magnetising the components influences these properties. A good part might be marked incorrectly and pseudo rejects can be produced if an inaccurate test result is generated. Therefore we recommend that the components be demagnetized beforehand for a reproducible structure test.

Use in magnetic particle testing
Einsatz-bei-der-Magnetpulverprüfung
Einsatz-bei-der-Magnetpulverprüfung

 

For crack detection with magnetic powder, the components must first be magnetized. In order to avoid the powder from sticking and prevent subsequent processes from being negatively influenced by excessive magnetization, the components must undergo a powerful demagnetization process.

Magnetic adhesion of metal chips
Magnetische-Anhaftungen-von-Metallspänen
Magnetische-Anhaftungen-von-Metallspänen

Various machining processes can produce metal chips that adhere to the components or tools. In the further production process these chips can contaminate or even damage the components. To prevent this, it is necessary to demagnetize the components so that the product quality is not endangered.

Coating processes
Beschichtungsprozesse
Beschichtungsprozesse

 

Fine particles on the material surface as well as residual magnetism can lead to a rough surface and chipping in certain coating processes. In addition, the residual magnetism can have an influence on the coating structure. To ensure a stable coating process, it is therefore necessary to demagnetize the components beforehand.

Compliance with manufacturer standards
Einhaltung-von-Herstellernormen
Einhaltung-von-Herstellernormen

 

Nowadays, components that are used in different sensors must comply with certain residual magnetism limits to prevent signal fluctuations. Therefore, there are often corresponding manufacturer standards that specify a certain limit value. By demagnetizing with the ZMAG CM you can comply with these standards and prove them.

Integrated solutions

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Product family STATOGRAPH

For reproducible crack detection on components, the product solutions of the STATOGRAPH family are available. Due to different production processes, remanence islands can appear in certain areas, frequently on the edges. To ensure that these local magnetizations do not generate interference signals during crack detection, we have the ZMAG CM demagnetization unit in our product portfolio for you. The ZMAG CM demagnetization unit helps you ensure that these local magnetizations do not generate any interference signals during the crack test.

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Product family MAGNATEST

With the testing devices and sensors from the MAGNATEST product family you can reliably test the microstructure and magnetic properties of your components. In this test, it is equally important to counteract interference signals caused by magnetization by means of effective demagnetization. With ZMAG CM you now receive all solutions at once.

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Would you like more information on the intuitive ZMAG CM?

Please contact us!
Contact

Institut Dr. Foerster GmbH & Co. KG

In Laisen 70
72766 Reutlingen
Germany

sales.de@foerstergroup.com
+49 7121 140-0

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