Investigation of strip deformation in tension bridles
When moving the strip in tension roll systems, the strip is subjected to repeated alternating bending with a superimposed longitudinal tensile stress. This stress state can result in obvious plastic stretching of the strip. To investigate strip deformation behaviour, a tension bridle was subjected to recoiling tests during which the process parameters such as strip tension, thickness and initial flatness were changed. As the strip moves around the tension rolls, irregular length distributions across its width occur, particularly when the strip is recoiled with tensions that are relatively small in relation to the 0.2% proof stress. These irregular deformations across the width of the strip result in marked deterioration of strip flatness. Slightly tempered strips (proof stress 200 N/mm2) tend to form wavy edges, even if the strip used has shown medium waviness before recoiling, whereas cold tempered strips (proof stress 400 N/mm2) show a tendency towards medium waviness. All tests show a thickness-dependent improvement of the flatness profile for increasing tensile stresses ranging between 25% and 75% of the 0.2% proof stress.
Bibliographic Reference: EUR 12983 DE (1991) 85 pp., FS, ECU 7.50
ISBN: ISBN 92-826-0464-0
Record Number: 199110238 / Last updated on: 1994-12-02
Original language: de
Available languages: de