Rozložení kontaktních napětí a teplených toků ve válcovací mezeře analyzovaných pomoci různých senzorů.

Contact stress distribution and roll surface temperature in the roll gap analyzed with different sensors

článek v časopise ve Web of Science, Jimp

en

In this work, the contact stresses and temperatures during hot and cold rolling have been measured. A work roll containing three different sensors was used for the measurements. There were two contact devices for directly measuring forces and one temperature sensor. One sensor was the ROLLSURF sensor. Results obtained with this sensor have been presented earlier [1-3]. The measurement principle is based on deformation measurements with strain gauges which were placed on an internal cradle-type roll insert. The second sensor was a fiction pin sensor. The forces on the top of the pin were measured by three axis piezoelectric-transducers. The pin sensor was mounted inside the work roll opposite to the ROLLSURF sensor. The third sensor was a thermocouple placed next to the pin sensor. The temperatures were measured very close to the roll surface. The surface boundary conditions including the heat flux and surface temperatures were computed using inverse modelling calculations developed at Brno University of Technology. The main task of this paper is to show a comparison of the contact forces and contact length measured with the strain-gauge sensor and the pin-sensor.

Rozložení kontaktních napětí a teplot ve válcovací mezeře byly měřeny pomocí různých senzorů. Měřící pracovní válec obsahuje tři různé senzory – dva kontaktní senzory pro měření sil a jeden teplotní senzor. Jedním ze senzoru byl ROLLSUF sensor. Tento senzor byl použit v předchozích studiích [1-3]. Měření je založeno na měření deformace měřícího elementu pomocí tenzometrů. Druhým senzorem je pin senzor, kde jsou síly na vrcholu pinu měřeny pomocí tříosého piezoelektrického snímače sil. Pin senzor ze umístěn v měřícím válci na opačné straně něž ROLLSURF. Teplotní senzor je umístěn hned vedle pin senzoru, kde měří podpovrchové teploty ve válci. Pomocí inverzní úlohy vedení tepla, vyvíjenou na VUT Brno, je tato teplota přepočítána na teplotní okrajovou podmínku ve válcovací mezeře Hlavním účelem tohoto článku je srovnáních napětí ve válcovací mezeře s kontaktní délkou změřenou pomocí dvou principiálně různých senzorů.

In this work, the contact stresses and temperatures during hot and cold rolling have been measured. A work roll containing three different sensors was used for the measurements. There were two contact devices for directly measuring forces and one temperature sensor. One sensor was the ROLLSURF sensor. Results obtained with this sensor have been presented earlier [1-3]. The measurement principle is based on deformation measurements with strain gauges which were placed on an internal cradle-type roll insert. The second sensor was a fiction pin sensor. The forces on the top of the pin were measured by three axis piezoelectric-transducers. The pin sensor was mounted inside the work roll opposite to the ROLLSURF sensor. The third sensor was a thermocouple placed next to the pin sensor. The temperatures were measured very close to the roll surface. The surface boundary conditions including the heat flux and surface temperatures were computed using inverse modelling calculations developed at Brno University of Technology. The main task of this paper is to show a comparison of the contact forces and contact length measured with the strain-gauge sensor and the pin-sensor.

Válcovací mezera; kontatní napětí; koficient tření; válcování za tepla; válcování za studena; tepelné toky

Roll gap; contact stresses; friction coefficient; hot rolling; cold rolling; heat flux

2013

01.01.2014

Associazione Italiana di Metallurgia

ITALY

9788885298958

0026-0843

Rollling2013

160

1

19–25

6