EP 0108379 B1 19890802 - METHOD AND CONTROLLING DEVICE TO REGULATE THE DISTRIBUTION OF TENSILE STRENGTH IN THE COLD ROLLING OF STRIPS
Title (en)
METHOD AND CONTROLLING DEVICE TO REGULATE THE DISTRIBUTION OF TENSILE STRENGTH IN THE COLD ROLLING OF STRIPS
Publication
Application
Priority
DE 3240602 A 19821103
Abstract (en)
[origin: EP0108379A2] 1. Method for the control of tensile stress distribution in the cold rolling of strips (1), the tensile stress distribution (sigma) being determined at least on one side of the mill stand (10) from the strip thickness and the values measured by load transducers spaced in axial direction over the roll width, and with the provision of a controller (25, 26) for the adjustment of the tensile stress distribution as well as of derivative final controlling elements for the roll gap dependent on the former and acting in axial direction of the work rolls (2), characterized in that in mill stands (10) driven in one direction the tensile stress distribution (sigma A , sigma E ) is determined on the entry side and on the delivery side of the mill stand (10) on the basis of tensile force measurements distributed over the roll width and of the strip thickness, and that the differential values (delta sigma) of same are formed from the tensile stresses distributed over the roll width, and that said differential values (delta sigma) are adjusted by means of position setpoint selections of the controller (25, 26) acting on the final controlling elements in such a manner that they are as far as possible differentially constant over the roll width, and are thus below a maximum value, above which a non-uniform material flow occurs and causes a backward slip which leads to material overlaps.
IPC 1-7
IPC 8 full level
B21B 37/42 (2006.01); B21B 37/00 (2006.01); B21B 37/28 (2006.01); B21B 37/48 (2006.01); B21B 1/36 (2006.01); B21B 13/14 (2006.01)
CPC (source: EP)
B21B 37/28 (2013.01); B21B 1/36 (2013.01); B21B 13/147 (2013.01)
Designated contracting state (EPC)
FR GB IT SE
DOCDB simple family (publication)
EP 0108379 A2 19840516; EP 0108379 A3 19860115; EP 0108379 B1 19890802; DE 3240602 A1 19840614; DE 3240602 C2 19930609; JP S59130615 A 19840727
DOCDB simple family (application)
EP 83110911 A 19831102; DE 3240602 A 19821103; JP 20731283 A 19831104