Mechanische Größen elektrisch messen

> 65

Years

> 1.250

Customers

> 10.000

Transducers

5

Continents

Strip Tension Measuring Systems for Metal Production and Metal Working

Precision is a top priority in the production and processing of metals. Our measuring technology greatly contributes to making industrial processes future-proof in order to be able to manufacture products of the highest quality. For this purpose, we offer, among other things, strip tension measuring systems, rolling force measuring systems as well as weighing systems and pressure transducers.

Dr. Brandt strip tension measuring transducers have been successfully used for decades in many plants in the metalworking industry, from hot-rolled strip to recoiling lines. They offer extraordinary performance under the most difficult environmental and operating conditions, thus ensuring reliable operation of the system with consistently high product quality. Our transducers are characterized by long service life and low maintenance expenditure and costs.

Our weighing systems are used, for example, for ladle turrets, billet weighing, coil weighing and scrap trolleys. The ladle weighing in foundries is also one of the processes we provide with reliable measuring technology.

Moreover, by manufacturing innovative measuring systems for industrial applications we have specialized in the development and production of tailor-made solutions for complex plants and systems. These systems, which are individually adapted to the respective plant and its field of application, may not only be implemented in newly constructed processes but also lend themselves to replacing third-party products in existing plants.

In addition, our product range offers a large number of standardized components, such as standardized strip tension transducers or load cells capable of being attached to all common roller bearing variants via adapter plates.

Calibration Services Offered by Dr. Brandt Provide Increased Safety and Efficiency

Even the slightest changes to a system require recalibration with a view to enabling the measuring sensors of your system to work perfectly.

With our mobile calibration tools, including reference force sensor, evaluation unit, and corresponding tensioning belts, we are able to carry out precise measurements for products of different manufacturers.

Regular checking, certification and, if necessary, adjustment of the current zero point and nominal force result in an optimal and smooth workflow to be obtained during operation, and ensure that your processes can be successfully audited.

Web Tension Measurement in the
Paper Industry

Continuous paper production processes require multipoint measurements of the web tension to enable the various individual drives to be controlled in a papermaking machine. The paper web proper cannot be directly measured due to process-specific necessities. For that reason, its tension is usually determined indirectly in such a manner that the web is deflected via a roller with the resulting bearing reaction forces being detected and converted into web tension forces using known web travel geometry parameters.

Force transducers of a specific design particularly suitable for measuring bearing reaction forces are usually arranged for this purpose between the bearing housings of the pulley or roller bearings and the foundation supports. In this context, Dr. Brandt transducers have been used successfully for years by leading paper machine manufacturers in Europe and the Far East.

Especially in papermaking machinery construction great emphasis is laid on making use of highly rigid structural elements. Web tension transducers and their mounting elements are not exempt from this requirement, either. The main reason for this stringent requirement to be complied with in the paper industry is to protect the structural systems against natural frequency vibrations. Due to the very high web velocities combined with high roll speed rates and at the same time high roll weights, these requirements are well understandable from a technical viewpoint. To satisfy these requirements, Dr. Brandt transducers for web tension measuring have been deliberately developed to offer particularly high torsional stiffness.

Since the transducers’ own mass is very low, their natural frequency is usually in the kHz range. The cutoff frequency of the entire measuring point thus virtually depends on the transducer’s torsional stiffness and on the mass of the deflector roll including supporting system.

Dr. Brandt’s technology for paper web transducers is based on the principle of strain gauges (special solutions on request). These do not behave dynamically on their own and thus do not influence the frequency behavior of the entire transducer element.

Dr. Brandt’s Electronic Instrumentation for Web Tension Measurement

Strain-gauge based transducers are passive systems that do not send out signals on their own. Their operating principle is based on the fact that the strain gauges (SG) increase their resistance at extension and decrease it at shortening. During the application work step in the manufacture of the transducers, the strain gauges are firmly attached to the spring body and thus follow each of its length changes precisely. In this way, any mechanical deformation of the spring elements due to the influence of the force to be measured (e.g. pressure, torque or torsion) is converted by the SG into resistance variations capable of being transformed into electrical signals provided the appropriate electrical circuitry is in place and then evaluated, archived or further processed by a downstream electronic system.

Computer-aided evaluations with the Dr. Brandt DMM-10 measuring electronics or similar are often used in the paper industry where a web tension measurement has to be installed directly in front of a coiler or reel. Due to the continuously increasing reel diameter, the deflection angle at the measuring roll changes constantly. By using the Dr. Brandt measuring electronics and other signals from the plant control unit, a measuring signal is nevertheless generated that corresponds to the real web tension, which is ultimately essential for reliable control of the reel drive.

Further Applications in the Papermaking Industry

Dr. Brandt transducers are in no way limited to the use of measuring systems exclusively aimed at web tension determination. By evaluating the bearing forces, Dr. Brandt's software-supported measuring electronics make it easy to also determine other variables that lead to a bearing reaction force.

For example, Dr. Brandt transducers are used for dynamic unbalance determination of working rolls in installed condition. Another application is the measurement of the contact forces of two rollers, e.g. in web coating to control the thickness or contact pressure. Moreover, measurements of line forces exerted when the web is taken up on a reel have also been realized quite often. 

 

In addition to the „normal“ web tension transducers, the use of microprocessor-controlled Dr. Brandt measuring electronics is indispensable here, since only a complex and extremely powerful filtering and further processing of the measuring signals enables the correct representation of the desired measured variable.

If you also have requirements that cannot be met by our modular system of standard solutions, please do not hesitate to contact us. We will be pleased to advise you and, on request, also manufacture special versions of transducers to optimally support your application economically and technically.

 

AISTech 2018 | USA
7.-10.5.2018 | Philadelphia





SENSOR + TEST | Germany
26.-28.6.2018 | Nürnberg
Hall 1 | Stand 1-141

METEC 2019 | Germany
25.-29.6.2019 | Düsseldorf

Attachments

Service

Repairs

Calibration Services Offered by Dr. Brandt Provide Increased Safety and Efficiency 

Even the slightest changes to a system require recalibration with a view to enabling the measuring sensors of your system to work perfectly.

With our mobile calibration tools, including reference force sensor, evaluation unit, and corresponding tensioning belts, we are able to carry out precise measurements for products of different manufacturers.

Regular checking, certification and, if necessary, adjustment of the current zero point and nominal force result in an optimal and smooth workflow to be obtained during operation, and ensure that your processes can be successfully audited.

Strip Tension Measuring Systems for Metal
Production and Metal Working

Precision is a top priority in the production and processing of metals. Our measuring technology greatly contributes to making industrial processes future-proof in order to be able to manufacture products of the highest quality. For this purpose, we offer, among other things, strip tension measuring systems, rolling force measuring systems as well as weighing systems and pressure transducers.

Dr. Brandt strip tension measuring transducers have been successfully used for decades in many plants in the metalworking industry, from hot-rolled strip to recoiling lines. They offer extraordinary performance under the most difficult environmental and operating conditions, thus ensuring reliable operation of the system with consistently high product quality. Our transducers are characterized by long service life and low maintenance expenditure and costs.

Our weighing systems are used, for example, for ladle turrets, billet weighing, coil weighing and scrap trolleys. The ladle weighing in foundries is also one of the processes we provide with reliable measuring technology.

Moreover, by manufacturing innovative measuring systems for industrial applications we have specialized in the development and production of tailor-made solutions for complex plants and systems. These systems, which are individually adapted to the respective plant and its field of application, may not only be implemented in newly constructed processes but also lend themselves to replacing third-party products in existing plants.

In addition, our product range offers a large number of standardized components, such as standardized strip tension transducers or load cells capable of being attached to all common roller bearing variants via adapter plates.

 

Calibration Services Offered by Dr. Brandt

The Art of Measuring in the Metal Industry

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The Art of Measuring in the Paper Industry

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Web Tension Measurement in
the Paper Industry

Continuous paper production processes require multipoint measurements of the web tension to enable the various individual drives to be controlled in a papermaking machine. The paper web proper cannot be directly measured due to process-specific necessities. For that reason, its tension is usually determined indirectly in such a manner that the web is deflected via a roller with the resulting bearing reaction forces being detected and converted into web tension forces using known web travel geometry parameters.

Force transducers of a specific design particularly suitable for measuring bearing reaction forces are usually arranged for this purpose between the bearing housings of the pulley or roller bearings and the foundation supports. In this context, Dr. Brandt transducers have been used successfully for years by leading paper machine manufacturers in Europe and the Far East.

Especially in papermaking machinery construction great emphasis is laid on making use of highly rigid structural elements. Web tension transducers and their mounting elements are not exempt from this requirement, either. The main reason for this stringent requirement to be complied with in the paper industry is to protect the structural systems against natural frequency vibrations. Due to the very high web velocities combined with high roll speed rates and at the same time high roll weights, these requirements are well understandable from a technical viewpoint. To satisfy these requirements, Dr. Brandt transducers for web tension measuring have been deliberately developed to offer particularly high torsional stiffness.

Since the transducers’ own mass is very low, their natural frequency is usually in the kHz range. The cutoff frequency of the entire measuring point thus virtually depends on the transducer’s torsional stiffness and on the mass of the deflector roll including supporting system.

Dr. Brandt’s technology for paper web transducers is based on the principle of strain gauges (special solutions on request). These do not behave dynamically on their own and thus do not influence the frequency behavior of the entire transducer element.

Dr. Brandt’s Electronic Instrumentation for
Web Tension Measurement

Strain-gauge based transducers are passive systems that do not send out signals on their own. Their operating principle is based on the fact that the strain gauges (SG) increase their resistance at extension and decrease it at shortening. During the application work step in the manufacture of the transducers, the strain gauges are firmly attached to the spring body and thus follow each of its length changes precisely. In this way, any mechanical deformation of the spring elements due to the influence of the force to be measured (e.g. pressure, torque or torsion) is converted by the SG into resistance variations capable of being transformed into electrical signals provided the appropriate electrical circuitry is in place and then evaluated, archived or further processed by a downstream electronic system.

Computer-aided evaluations with the Dr. Brandt DMM-10 measuring electronics or similar are often used in the paper industry where a web tension measurement has to be installed directly in front of a coiler or reel. Due to the continuously increasing reel diameter, the deflection angle at the measuring roll changes constantly. By using the Dr. Brandt measuring electronics and other signals from the plant control unit, a measuring signal is nevertheless generated that corresponds to the real web tension, which is ultimately essential for reliable control of the reel drive.

Further Applications in the Papermaking Industry

Dr. Brandt transducers are in no way limited to the use of measuring systems exclusively aimed at web tension determination. By evaluating the bearing forces, Dr. Brandt's software-supported measuring electronics make it easy to also determine other variables that lead to a bearing reaction force.

For example, Dr. Brandt transducers are used for dynamic unbalance determination of working rolls in installed condition. Another application is the measurement of the contact forces of two rollers, e.g. in web coating to control the thickness or contact pressure. Moreover, measurements of line forces exerted when the web is taken up on a reel have also been realized quite often. 

 

Calibration Services Offered by Dr. Brandt

 

 

In addition to the „normal“ web tension transducers, the use of microprocessor-controlled Dr. Brandt measuring electronics is indispensable here, since only a complex and extremely powerful filtering and further processing of the measuring signals enables the correct representation of the desired measured variable.

If you also have requirements that cannot be met by our modular system of standard solutions, please do not hesitate to contact us. We will be pleased to advise you and, on request, also manufacture special versions of transducers to optimally support your application economically and technically.

AISTech 2018 | USA
7.-10.5.2018 | Philadelphia
Stand 3052

SENSOR + TEST | Germany
26.-28.6.2018 | Nuernberg
Hall 1 | Stand 1-141

 

Free Sensor Ticket

 

 

METEC 2019 | Germany
25.-29.6.2019 | Duesseldorf

Strip Tension

Based on basic designs tried and tested in practice Dr. Brandt GmbH develops optimized system solutions for the safe measurement of strip and web tension in your production lines and equipment.

 


More

Web Tension

Continuous paper production processes require multipoint measurements of the web tension
to enable the various individual
drives to be controlled in a papermaking machine.



More

Testing of Ropes

Ropes in safety-critical areas (such as, for example, track cables and traction ropes of cable cars and lifts, anchoring ropes for excavators, hangars, cranes, masts, bridge catenary cables or hoisting ropes) as well as wire rope reinforced.

 

More

Weighing

Weighing technology and special measuring or weighing projects have been one of the core areas of Dr. Brandt GmbH since the earliest beginnings.




More

The Art of Measuring

in the Metal Industry

Dr. Brandt GmbH has always been a forerunner in the development of innovative force measuring systems. As the inventor of the load cell, we have been contin-
uously pioneering this field ever since our company was founded. Based on the sensors developed by us, we offer numerous measuring systems.

We know: Our measurement technology forms the basis for safe and trouble-free process control. Consequently, we are fully aware of our professional responsibility in the development and production of precise measuring systems which convince by their long service life.

The portfolio of Dr. Brandt GmbH comprises numerous products with the focus laid on the accurate measurement of tensile force, compression force, shear force and torque in a wide variety of processes. For this purpose, innovative force and pressure sensors are used as transducers and load cells. Via real-time control, the data thus obtained are directly employed for process improvement. Our measuring systems can also be retrofitted in existing plants and equipment.

The Art of Measuring

in the Papermaking Industry

In the paper and sheet/film manufacturing industry, continuous monitoring of production processes by means of precise measuring technology is decisive for product quality. Dr. Brandt GmbH specializes in the manufacture of tailor-made systems for this industrial segment. For this purpose, numerous different load cells and load measuring pins are available for construction.

The wide range of load cells, which can measure either vertically or horizontally to the mounting level, enables suitable systems to be individually developed. Our versatile load cells are particularly useful for measuring the tension of paper webs.

As an alternative to the manufacture of customized measuring technology, our product range also offers a selection of standardized components with adapter plates. These adaptable transducers can be used on optional pillow blocks or are suitably employed for a variety of applications. Both standardized and tailored systems are modern system solutions for monitoring web tension in the production of film or paper.