Strip edge profile measuring system “Edge Drop”: Significantly reduced reject rate with optimised product quality

Customer Confirms Payback After Just 3 Years

Heiligenhaus, July 2021

Classical measurement of strip centreline thickness and fully automated determination of the respective strip edge thickness profile with the IMS Edge Drop strip edge profile measuring system

Radiometric and optical measuring systems from IMS Messsysteme GmbH have been an integral part of the processes in steel rolling mills since the 1980s. Undergoing continuous development, each of these specific measuring systems contributes significantly to quality assurance in the manufacture of rolled products for the highest demands through 100% automated measurement, logging and documentation. Like the strip edge profile measuring system “Edge Drop”. Installed, for example, at the exit of a tandem mill, this system determines the exact strip edge thickness profile as well as the centreline thickness of the material.

It is a well-known problem: due to the rolling process, cold-rolled steel strip is thinner at the edges than in the centre. Customers, however, require a rolled end product with a thickness that lies within the tolerance range across the entire width of the strip.

For this reason, rolling mills produce with an excess width, whose size is based on empirical values. In this manufacturing method, the strip edges that fall short of the target thickness are trimmed off at the end of the production process in order to guarantee the required target thickness from edge to edge. From an economic point of view, however, this solution is anything but ideal, as it leads not only to increased material usage but also to a high level of waste, and thus to a cost-intensive material scrap rate and a poorer production result.

Deviations from the specified standard mean, therefore, in the worst case that the rolled end product is unusable for further processing as intended. In cold rolling mills, in particular, the risk of customer complaints is especially high if the profile thickness is out of the tolerance range. Only an end product with a uniform strip thickness that meets the specifications can guarantee its unrestricted suitability as a starting material for the processing industry. The IMS Edge Drop strip edge profile measuring system makes an economically compelling contribution to ensuring this

The most important parameter for the end product in cold rolling mills is the centre thickness of the strip. Classic 5-stand tandem mills therefore usually have a single-head centreline thickness measuring system before and after stand 1, as well as two redundant systems downstream of stand 5.

The Edge Drop strip thickness profile measuring system, by contrast, has three measuring heads. The middle measuring head, as in other thickness measuring systems, measures the strip centre thickness. What makes Edge Drop different, however, are the two outer measuring heads which can be moved independently of each other and fully automatically measure the respective strip edge thickness profile with high resolution.

As standard, the detector unit of the IMS Edge Drop installed in the middle measuring head comprises two or four detectors, while the two outer units have 15 or 22 detectors, although special solutions are also possible if required. Ionisation chambers are used as detectors. They convert the radiation that passes from the x-ray tubes through the material into electrical current. Using this residual radiation, or the current converted from it, the system determines the exact centre thickness and strip edge thickness profile.

The advantages of the IMS Edge Drop are therefore clear:

  • The amount of trimmed material can be determined precisely from the measurement reports, which significantly reduces the scrap rate.
  • At the same time, it is possible to control the rolling mill automatically with the help of the measurement results via a closed loop control, resulting in further optimisation of the production process.

Installed at the exit of the rolling mill, both the strip centre thickness and the strip edge thickness profile are thus determined with equal precision – and all this with just one Edge Drop strip edge profile measuring system.

Use of an Edge Drop strip edge profile measuring system is therefore a win-win solution for both the rolling mill and its end customers: the rolling mill produces cost-efficiently and in keeping with the highest quality standards, while the processing industry receives a flawless starting product that meets individual requirements.

Feedback from an Asian customer confirms the economic efficiency that use of an Edge Drop strip edge profile measuring system offers to rolling mills. In its tandem mill for silicon steels, the comparatively high initial costs of the IMS Edge Drop measuring system paid for themselves within just 3 years, solely due to the significant reduction in the scrap rate

However, the IMS Edge Drop measuring system is not only a benefit for steel rolling mills, but silicon rolling mills also profit decisively from its advantages. In this field in particular, highly exact thicknesses are crucial. In many of the end products produced there, several layers of the thinnest silicon steels are processed one on top of the other, such as in the manufacture of transformers. If the thicknesses of the individual layers are not connected homogeneously across the entire surface, the functionality of the end product may be impaired. The IMS Edge Drop determines and records the exact profile thickness even in these minimal thickness ranges, thus ensuring a high-quality and flawless product.

In our media area you will find supplementary image material of the
IMS Messsysteme GmbH for free use in the context of your public relations.

Our responsible contact person for press & media will of course be happy to answer any questions you may have. We look forward to hearing from you!

Sonja Koch
Dipl. Eng.
Umfangreiche Dienstleistungen zum
Betrieb, Wartung und Reparatur Ihrer Anlage

Unsere Service Hotline steht Ihnen während der Geschäftszeiten kostenfrei zur Verfügung. 

Halten Sie bitte zur schnelleren Bearbeitung die Projekt- und Auftrags-Nr. bereit.

Hotline
Bereitschaftsdienst

In dringenden Fällen steht Ihnen außerhalb der Geschäftszeiten unser telefonischer Bereitschaftsdienst zur Verfügung. Für diese Leistung können Zusatzkosten entstehen.

Aktuelle Events

Lassen Sie sich von unserem Team vor Ort über das beeindruckende Produktportfolio aus der IMS Welt der Messsysteme informieren und von aktuellen Entwicklungsprojekten inspirieren. Wir freuen uns auf Sie!

EuroBlech

Hannover, Deutschland
22. - 25. Oktober 2024

Aluminium Düsseldorf

Düsseldorf, Deutschland
08. - 10. Oktober 2024

European Continous Casting Conference

Essen, Deutschland
07. - 11. Oktober 2024

ABM Week

São Paulo, Brasilien
03. – 05. September 2024
Karriere

Werden Sie Teil der Community beim Weltmarktführer für Röntgen-, Isotopen- und optische Messsysteme für die Stahl-, Nichteisenmetall- und Aluminiumindustrie.

Wir überzeugen Sie gerne mit unseren hervorragenden Arbeitsbedingungen, einem tollen Team und spannenden Jobs mit großem Entwicklungspotenzial. 

Weltweit für Sie da

20 der 20 international größten Stahl- und Aluminiumhersteller vertrauen im Rahmen ihrer Qualitätssicherung auf die Präzision unserer Messysteme. Vertrauen, das verpflichtet.

Über 30 Tochterunternehmen, Joint-Ventures, Handelspartner und Agenten garantieren die maximale Zufriedenheit unserer Kunden rund um den Globus.

Wie können wir Sie unterstützen?
Sales

Sie haben Interesse an unseren Messsystemen oder suchen einen starken Partner für kundenspezifische Sonderlösungen?

Karriere

Sie wünschen sich eine neue berufliche Herausforderung bei einem ganz besonderen Arbeitgeber, mit besonderem Team? Bewerben Sie sich jetzt.

Service

Unser Service Team unterstützt Sie rund um die Themen Inbetriebnahme, Wartung und Service, Technischer Support, sowie bei Ersatzteil- und Reparaturanfragen.

You need support?

We will be happy to advise you!

Before you leave!

Icon-Newsletter.png

WHY NOT SUBSCRIBE TO OUR NEWSLETTER?

You will receive all relevant news about our measuring systems and services conveniently by mail. No advertising and no spam. That’s a promise! And you can unsubscribe at any time.

Für den Versand unserer Newsletter nutzen wir rapidmail. Mit Ihrer Anmeldung stimmen Sie zu, dass die eingegebenen Daten an rapidmail übermittelt werden. Beachten Sie bitte auch die AGB und Datenschutzbestimmungen .

Comprehensive services for the
operation, maintenance and repair of your system

Our service hotline is available to you free of charge during business hours. 

Please have the project and order number at hand for faster processing.

Hotline
Emergency Service

In urgent cases, you can contact our emergency service by telephone outside business hours. Additional charges may apply for this service.

Current Events

Visit us and find out from our team first-hand about the impressive product portfolio from the IMS world of measurement and learn about current development projects. We look forward to seeing you!

Expo Acero

San Luis Potosi, Mexico
11th - 13th March 2024

TUBE

Düsseldorf, Germany
15th - 19th April 2024

SEAISI

Da Nang, Vietnam
13th - 16th May 2024

Aluminium China

Shanghai, P.R. China
3rd - 5th July 2024
Career

Join the community at the world market leader for x-ray, isotope and optical measuring systems for the steel, non-ferrous metal and aluminium industries.

Find out more about our outstanding work conditions, our fantastic team and exciting jobs with excellent opportunities for professional growth.

Working for You Worldwide

Twenty of the 20 largest international steel and aluminium manufacturers rely on the precision of our measuring systems for their quality assurance. A trust that comes with responsibilities.

More than 30 subsidiaries, joint ventures, trading partners and agents guarantee maximum customer satisfaction around the globe.

How can we support you?
Sales

You are interested in our measuring systems or are looking for a strong
partner for customised special
solutions?

Career

You are looking for a new professional challenge with a very special employer and a special team? Apply now.

Service

Our service team will support you in all aspects of commissioning, maintenance and service, technical support, as well as with spare parts and repair requests.