TORQUEMONINLINE TORQUE MEASUREMENT FORROLLING MILL SPINDLES
Dynamic torque measurement supports the monitoringof drive systems in rolling plants. Problems arising during
the production process in the drive train components are
predominantly seen in the form of torque fluctuations.
Torque observation supports the prevention of
breakdowns, enables maintenance to be planned andincreases production.

FUNCTION
The torque measurement system, TorqueMon, is a reliable
method of measuring the torque of rolling mill spindles. Itoffers a permanent, real-time measurement based on theprinciple of strain gauge measurement. Sensors mounted
on the rotating parts send the measurement signals to arotary antenna.

YOUR CHALLENGE
In order to ensure high product quality, stable andconsistent rolling parameters must be achieved in therolling process. Incorrect torque can lead to flatness defects
on the product, such as turn up or turn down, which may
cause additional damage or cobbles during the rolling
process. Furthermore, in terms of reliability, fluctuating
torque can lead to an overload, damaging bearings andmotors and in the worst case resulting in breakage of thespindles, roll necks or chocks. In most cases this type ofdamage is related to the torque and a difference in speed
between the work rolls.

A stationary, wireless, antenna supplies all rotary parts
with power and receives the measurement signals from thespindle mounted sensor. Calibrated telemetry converts themeasurements into analogue or digital signals. An optional
evaluation unit can be used for data access and storage aswell as for the evaluation of the data. These results can beeasily used to verify and detect variations and overloads inthe rolling torque during the whole rolling process.

Speed measurements and current measurements at themotor are influenced by inertia and damping at thegearbox so are not the most reliable method for
determining actual torque loading. In comparison,measurements taken directly at the shaft can easily andreliably identify the true torque loading on the spindles.

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Flat or fork type antenna

TorqueMon measurement data of upper and lower roll shaft

PRODUCT FEATURES
Torque measurement is possible under almost allenvironmental conditions. Sensor-positions can becalibrated remotely, and the measurement data transfer
system can be used with other spindle mounted sensors,
such as a temperature sensor.
The full range of amplification and offset settings
are adjustable. The contactless transmission method
uses inductive couplings between measurement andtransmission devices. The design is maintenance-free andprovides uninterrupted and permanent measurement (nobatteries that can run out of power).

ADVANTAGES OF TORQUEMON:• Prevention of unplanned production stops• Exact knowledge of health state of the shaft• Industrially robust system• High temperature stability (up to 100 °C)• Maintenance-free, permanent measurement

Features of Evaluation Unit:• Basic values: max/min/mean torque; load history,overload alarming• Torsional spring oscillation analysis incl. dampening• Torque stress related to design parameters over life-time(load collective, TAF…)TECHNICAL DATA
• Rotational acceleration up to 100 g (optionally higher)• Maximum shaft temperature of 100 °C (optionally up to220 °C), max. surrounding temperature of 100 °C

TorqueMon with Evaluation Unit

• Measurement of dynamic torque up to 1 kHz• Adjustable measuring and zero-point range• Frequency range 0 to 1 kHz• Temperature range -20 ° to +70 °C

Primetals Technologies
Austria GmbHA joint venture of Mitsubishi Heavy
Industries and partners
Turmstrasse 44 | 4031 Linz | Austria
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Order No. T10-4-N118-L2-P-V2-EN
Printed in Linz | © 2020

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