Patent US1668128A successfully refreshed from Google Patents.
Patent EP0121148B1 successfully refreshed from Google Patents.
EP0121148B1
Expired / Lapsed
EP
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Method of making hot rolled strip with a high quality section and flatness
Assignee: SMS Siemag AG
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Filing: 1984-03-09
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Granted: 1989-02-15
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Expires: 2004-03-09
Abstract
No abstract record available.
Inventors
- 👤 Jürgen Klöckner
- 👤 Wolfgang Rohde
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 08:48
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
283 words
Method for the production of rolled strip, in which this is conducted through a tandem hot-strip roll train and in that case during the rolling operation subjected to a state regulation which comprises a strip profile regulation and - in at least the last roll stand - a strip profile regulation and a planarity regulation originating from a planarity measurement of the rolled strip issuing from the last stand of the tandem hot-strip roll train, characterised by the following steps: a) determining and filing the critical thickness of the rolled strip to be rolled, below which thickness no further substantial deformation of the rolled strip in direction of the width is attainable, b) rolling of this rolled strip, the thickness of which is substantially greater than the determined critical thickness, successively in a first and a second rolling stage, in each of which the rolled strip is conducted through at least one roll gap forming this, c) reducing the thickness of the rolled strip in the first rolling stage to substantially the determined critical thickness, d) checking the reduction in the thickness of the rolled strip in this rolling stage by measurement of the thickness behind the first rolling stage and adjusting at least the last roll gap in this first rolling stage by reason of the result of the measurement of the thickness, e) measuring the planarity of the rolled strip in the second rolling stage at at least one place in the course of this rolling stage and f) reducing the thickness of the rolled strip in this second rolling stage to a thickness lying below the critical thickness by reason of the measurement of the planarity of the rolled strip.
Claim 2
Dependent Claim
283 words
Method for the production of rolled strip, in which this is conducted through a tandem hot-strip roll train and in that case during the rolling operation subjected to a state regulation which comprises a strip profile regulation and - in at least the last roll stand - a strip profile regulation and a planarity regulation originating from a planarity measurement of the rolled strip issuing from the last stand of the tandem hot-strip roll train, characterised by the following steps: a) determining and filing the critical thickness of the rolled strip to be rolled, below which thickness no further substantial deformation of the rolled strip in direction of the width is attainable, b) rolling of this rolled strip, the thickness of which is substantially greater than the determined critical thickness, successively in a first and a second rolling stage, in each of which the rolled strip is conducted through at least one roll gap forming this, c) reducing the thickness of the rolled strip in the first rolling stage to substantially the determined critical thickness, d) checking the reduction in the thickness of the rolled strip in this rolling stage by measurement of the thickness behind the first rolling stage and adjusting at least the last roll gap in this first rolling stage by reason of the result of the measurement of the thickness, e) measuring the planarity of the rolled strip in the second rolling stage at at least one place in the course of this rolling stage and f) reducing the thickness of the rolled strip in this second rolling stage to a thickness lying below the critical thickness by reason of the measurement of the planarity of the rolled strip.
Claim 3
Dependent Claim
51 words
Method according to claim 1, characterised thereby, that the height of the last roll gap in the first rolling stage is set in accordance with the comparison of the result of a measurement of the thickness of the rolled strip behind the first rolling stage with a given empirical standard value.
Claim 4
Dependent Claim
28 words
Method according to claim 1, characterised thereby, that the result of the measurement of the planarity of the rolled strip is compared with a given empirical standard value.
Claim 5
Dependent Claim
45 words
Method according to claim 1, characterised thereby, that the magnitude of the reduction in the thickness of the rolled strip in the first rolling stage is determined and regulated by reason of measurements of the thickness of the rolled strip within the second rolling stage.
Claim 6
Dependent Claim
218 words
Tandem hot-strip roll train for the production of rolled strip, in which this is during the rolling operation subjected to a state regulation which comprises a strip profile regulation and - in the last roll stand - a strip profile regulation and a planarity regulation originating from a planarity measurement of the rolled strip issuing from the last stand of the tandem hot-strip roll train, characterised thereby, that in a group (1 to 3) of roll stands (1, 2 and 3) with a roll gap height equal to or greater than the critical thickness (KD), below which thickness no further substantial deformation of the rolled strip in direction of the width is attainable, profile-measuring devices (8, 9,10) and profile regulators (13,14,15) are allocated, which stand in connection with strip profile setting members at the roll stands (1, 2 and 3), whilst the last roll stand (3) of this group (1, 2 and 3) and all remaining roll stands (4 and 5) display planarity-measuring devices (10', 11, 12) and planarity regulators (15', 16, 17), which are connected with strip planarity setting members, and that the last roll stand (3) of the group (1 to 3) is in that case influenceable selectably either by profile-measuring devices (10) and profile regulators (15) or by planarity-measuring devices (10') and planarity regulatory (15').
Claim 7
Dependent Claim
218 words
Tandem hot-strip roll train for the production of rolled strip, in which this is during the rolling operation subjected to a state regulation which comprises a strip profile regulation and - in the last roll stand - a strip profile regulation and a planarity regulation originating from a planarity measurement of the rolled strip issuing from the last stand of the tandem hot-strip roll train, characterised thereby, that in a group (1 to 3) of roll stands (1, 2 and 3) with a roll gap height equal to or greater than the critical thickness (KD), below which thickness no further substantial deformation of the rolled strip in direction of the width is attainable, profile-measuring devices (8, 9,10) and profile regulators (13,14,15) are allocated, which stand in connection with strip profile setting members at the roll stands (1, 2 and 3), whilst the last roll stand (3) of this group (1, 2 and 3) and all remaining roll stands (4 and 5) display planarity-measuring devices (10', 11, 12) and planarity regulators (15', 16, 17), which are connected with strip planarity setting members, and that the last roll stand (3) of the group (1 to 3) is in that case influenceable selectably either by profile-measuring devices (10) and profile regulators (15) or by planarity-measuring devices (10') and planarity regulatory (15').
Claim 8
Dependent Claim
50 words
Tandem hot-strip roll train according to claim 5, characterised thereby, that either the profile-measuring devices (8, 9, 10) or the planarity-measuring devices (10', 11, 12) are arranged downstream of the roll gap, which is to be regulated, of the roll stands (1, 2 and 3 or 3, 4 and 5).
Claim 9
Dependent Claim
216 words
Tandem hot-strip roll train for the production of rolled strip, in which this is during the rolling operation subjected to a state regulation which comprises a strip profileregulation and - in the last roll stand - a strip profile regulation and a planarity regulation originating from a planarity measurement of the rolled strip issuing from the last stand of the tandem hot-strip roll train, characterised thereby, the tandem hot-strip roll train displays n roll stands (F1 to F7) and a planarity-measuring device (38) and a profile-measuring device (58) downstream thereof are arranged downstream of the nth roll stand (F7), of which the planarity-measuring device (38) is connected with a planarity computer (30), the output signals of which influence devices (27, 37, 47) for the setting-on and bending of the rolls of the n th roll stand (F7) the profile-measuring device (58) is connected with a profile computer (50), the output signals of which influence devices (27, 37, 47) for the setting-on and bending of this roll stand (F7) and the preceding (n-1 ) th to ( n -3)th or (n-4)th roll stands (F6 - F4 or F3) and planarity computer (30) as well as profile computer (50) are connected with a process computer (70), which displays comparison devices and fixed value stores and issues correction instructions.
Claim 10
Dependent Claim
216 words
Tandem hot-strip roll train for the production of rolled strip, in which this is during the rolling operation subjected to a state regulation which comprises a strip profileregulation and - in the last roll stand - a strip profile regulation and a planarity regulation originating from a planarity measurement of the rolled strip issuing from the last stand of the tandem hot-strip roll train, characterised thereby, the tandem hot-strip roll train displays n roll stands (F1 to F7) and a planarity-measuring device (38) and a profile-measuring device (58) downstream thereof are arranged downstream of the nth roll stand (F7), of which the planarity-measuring device (38) is connected with a planarity computer (30), the output signals of which influence devices (27, 37, 47) for the setting-on and bending of the rolls of the n th roll stand (F7) the profile-measuring device (58) is connected with a profile computer (50), the output signals of which influence devices (27, 37, 47) for the setting-on and bending of this roll stand (F7) and the preceding (n-1 ) th to ( n -3)th or (n-4)th roll stands (F6 - F4 or F3) and planarity computer (30) as well as profile computer (50) are connected with a process computer (70), which displays comparison devices and fixed value stores and issues correction instructions.
Claim 11
Dependent Claim
78 words
Tandem hot-strip roll train according to one or more of the claims 5 to 7, characterised thereby, that the strip profile setting members, the bending of the rolls, the setting-on of the rolls, the offset of the rolls, the pivotation of the rolls, the zonal cooling of the roll barrels as well as the axial displacement of the working rolls, the intermediate rolls and of the backing rolls in the first roll stands are influenceable individually and/or simultaneously.
References Cited (Backward Citations)
No citation records indexed.
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