US3714805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system and method for concurrent automatic gage and crown control of a rolling mill
Assignee: United Engineering Inc
•
Filing: 1971-11-11
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Granted: 1973-02-06
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Expires: 1991-11-11
Abstract
Abstract A control system and method for concurrently controlling the delivery gage and crown of a workpiece while it is being processed in a rolling mill, preferably in the form of a 4-high rolling mill including a piston and cylinder assembly type of force applicator for adjusting the gap formed between the working rolls under the rolling load. The rolling mill further includes roll bending apparatus whereby bending forces are applied to extended journals of the backup rolls for changing the effective roll crown at the roll gap. The control system provides an automatic control designed to concurrently maintain a relationship between signals generated on the basis of rolling mill measurements to control the force applicator and the roll bending device. This concurrent relationship of signals equates a position change of the force applicator with the algebraic sum of signals representing roll gap changes due to a change in the rolling load and due to a change in the roll bending force, while concurrently the change in roll crown due to a change in roll bending force is equated to a rolling load change. The control system includes additional circuitry for an alternate form of concurrent gage and crown control.
Inventors
- 👤 M Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:29
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/28; B21B37/38
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
218 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including roll bending means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence said signals have on the delivery thickness and crown of a workpiece, and controlling said force applicator means and said roll bending means according to said concurrent interrelationships to yield a constant thickness and crown of a workpiece delivered from said rolling mill.
Claim 2
Independent Claim
218 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including roll bending means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence said signals have on the delivery thickness and crown of a workpiece, and controlling said force applicator means and said roll bending means according to said concurrent interrelationships to yield a constant thickness and crown of a workpiece delivered from said rolling mill.
Claim 3
Independent Claim
218 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including roll bending means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence said signals have on the delivery thickness and crown of a workpiece, and controlling said force applicator means and said roll bending means according to said concurrent interrelationships to yield a constant thickness and crown of a workpiece delivered from said rolling mill.
Claim 4
Independent Claim
218 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including roll bending means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence said signals have on the delivery thickness and crown of a workpiece, and controlling said force applicator means and said roll bending means according to said concurrent interrelationships to yield a constant thickness and crown of a workpiece delivered from said rolling mill.
Claim 5
Independent Claim
276 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including roll bending means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence said signals have on the delivery thickness and crown of a workpiece, controlling said force applicator means and said roll bending means in accordance with saiD concurrent interrelationships in such a manner that the algebraic sum of the changes in the roll gap due to variations in the rolling load, variations in the position of said force applicator means, and variations in said roll bending force is reduced to zero and concurrently the algebraic sum of the changes in the effective roll crown due to variations in the rolling load and variations in said roll bending force is reduced to zero.
Claim 6
Independent Claim
276 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including roll bending means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence said signals have on the delivery thickness and crown of a workpiece, controlling said force applicator means and said roll bending means in accordance with saiD concurrent interrelationships in such a manner that the algebraic sum of the changes in the roll gap due to variations in the rolling load, variations in the position of said force applicator means, and variations in said roll bending force is reduced to zero and concurrently the algebraic sum of the changes in the effective roll crown due to variations in the rolling load and variations in said roll bending force is reduced to zero.
Claim 7
Independent Claim
243 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure, which includes a pair of working rolls, each of which are supported by a back-up roll in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said working rolls, said rolling mill further including roll bending piston and cylinder means for exerting a roll bending force to apply bending moments to extended journals of the back-up rolls for changing the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending piston and cylinder means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence said signals have on the delivery thickness and crown of a workpiece, controlling said force applicator means and said roll bending piston and cylinder means in such a manner that said interrelationships given by the following expressions are concurrently reduced to zero:
Claim 8
Independent Claim
243 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure, which includes a pair of working rolls, each of which are supported by a back-up roll in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said working rolls, said rolling mill further including roll bending piston and cylinder means for exerting a roll bending force to apply bending moments to extended journals of the back-up rolls for changing the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending piston and cylinder means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence said signals have on the delivery thickness and crown of a workpiece, controlling said force applicator means and said roll bending piston and cylinder means in such a manner that said interrelationships given by the following expressions are concurrently reduced to zero:
Claim 9
Independent Claim
385 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure, which includes a pair of working rolls, each of which are supported by a back-up roll in a mill housing having force applicator piston and cylinder means for adjusting under the rolling load the gap formed between said working rolls, position transducer means for sensing change of said force applicator piston and cylinder means, said rolling mill further including roll bending piston and cylinder means for exerting a roll bending force to apply bending moments to extended journals of the back-up rolls for changing the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator piston and cylinder means, and from changes in said roll bending piston and cylinder means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence saiD signals have on the delivery thickness and crown of a workpiece, controlling said force applicator piston and cylinder means and said roll bending piston and cylinder means according to said interrelationships of said signals such that the following expressions are concurrently reduced to zero: Delta P/MG/P -( Delta Q/Ms + Delta B/MG/B) -> 0 and Delta P/MC/P - Delta B/MC/B -> 0 where Delta P/MG/P a change in said gap formed between said working rolls due to a change in the rolling load Delta Q/Ms a change in the displacement of said force applicator means as sensed by said position transducers Delta B/MG/B a change in said gap formed between said working rolls due to a change in said roll bending force Delta P/MC/P a change in the effective crown of said working rolls due to a change in the rolling load Delta B/MC/B a change in the effective crown of said working rolls due to a change in said roll bending force.
Claim 10
Independent Claim
385 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure, which includes a pair of working rolls, each of which are supported by a back-up roll in a mill housing having force applicator piston and cylinder means for adjusting under the rolling load the gap formed between said working rolls, position transducer means for sensing change of said force applicator piston and cylinder means, said rolling mill further including roll bending piston and cylinder means for exerting a roll bending force to apply bending moments to extended journals of the back-up rolls for changing the effective crown of said working rolls, said method comprising the steps of: generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator piston and cylinder means, and from changes in said roll bending piston and cylinder means, forming in a predetermined manner concurrent interrelationships between said signals in accordance with the simultaneous influence saiD signals have on the delivery thickness and crown of a workpiece, controlling said force applicator piston and cylinder means and said roll bending piston and cylinder means according to said interrelationships of said signals such that the following expressions are concurrently reduced to zero: Delta P/MG/P -( Delta Q/Ms + Delta B/MG/B) -> 0 and Delta P/MC/P - Delta B/MC/B -> 0 where Delta P/MG/P a change in said gap formed between said working rolls due to a change in the rolling load Delta Q/Ms a change in the displacement of said force applicator means as sensed by said position transducers Delta B/MG/B a change in said gap formed between said working rolls due to a change in said roll bending force Delta P/MC/P a change in the effective crown of said working rolls due to a change in the rolling load Delta B/MC/B a change in the effective crown of said working rolls due to a change in said roll bending force.
Claim 11
Dependent Claim
132 words
A method of automatically controlling the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill according to claim 4 comprising the additional steps of: controlling said roll bending piston and cylinder means during the momentary period of time when the workpiece first enters the rolling mill, according to the equation Bo/MC/B PoMC/P -(CM + CT + C /D) where Bo/MC/B an initial, lock-on reference effective crown in the work rolls due to said roll bending force Po/MC/P an initial, lock-on reference effective crown in the work rolls due to said rolling load CM the effective mechanical crown in said working CT the thermally induced effective crown in said working rolls C /D the desired crown in the workpiece after a thickness reduction in the rolling mill.
Claim 12
Independent Claim
226 words
A method of concurrently controlling the delivery thickness and crown of a workpiece while it is being processed in a rolling mill which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the steps of: generating a first signal representing a change in the roll gap due to a change in rolling load, generating a second signal representing a change in the position of said force applicator means, generating a third signal representing a change in the roll gap due to a change in the roll bending force, generating a fourth signal representing a change in the roll crown due to a change in rolling load, generating a fifth signal representing a change in the roll crown due to a change in said roll bending force, and controlling said force applicator means and said means for exerting a roll bending force in such a way that the algebraic sum of said first, second and third signals and the algebraic sum of said fourth and fifth signals are concurrently reduced to zero or substantially zero to thereby produce a workpiece having constant thickness and crown.
Claim 13
Independent Claim
226 words
A method of concurrently controlling the delivery thickness and crown of a workpiece while it is being processed in a rolling mill which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the steps of: generating a first signal representing a change in the roll gap due to a change in rolling load, generating a second signal representing a change in the position of said force applicator means, generating a third signal representing a change in the roll gap due to a change in the roll bending force, generating a fourth signal representing a change in the roll crown due to a change in rolling load, generating a fifth signal representing a change in the roll crown due to a change in said roll bending force, and controlling said force applicator means and said means for exerting a roll bending force in such a way that the algebraic sum of said first, second and third signals and the algebraic sum of said fourth and fifth signals are concurrently reduced to zero or substantially zero to thereby produce a workpiece having constant thickness and crown.
Claim 14
Independent Claim
215 words
A method of concurrently controlling the delivery thickness and crown of a workpiece while it is being processed in a rolling mill which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the stePs of: generating a first signal representing a change in the roll gap and due to a change in rolling load which includes the influence of said roll bending force, generating a second signal representing a change in the position of said force applicator means, generating a third signal representing a change in the roll crown due to a change in rolling load, generating a fourth signal representing a change in the roll crown due to a change in said roll bending force, and controlling said force applicator means and said means for exerting a roll bending force in such a way that the algebraic sum of said first and second signals and the algebraic sum of said third and fourth signals are concurrently reduced to zero or substantially zero thereby to produce a workpiece having constant thickness and crown.
Claim 15
Independent Claim
215 words
A method of concurrently controlling the delivery thickness and crown of a workpiece while it is being processed in a rolling mill which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including means for exerting a roll bending force to change the effective crown of said working rolls, said method comprising the stePs of: generating a first signal representing a change in the roll gap and due to a change in rolling load which includes the influence of said roll bending force, generating a second signal representing a change in the position of said force applicator means, generating a third signal representing a change in the roll crown due to a change in rolling load, generating a fourth signal representing a change in the roll crown due to a change in said roll bending force, and controlling said force applicator means and said means for exerting a roll bending force in such a way that the algebraic sum of said first and second signals and the algebraic sum of said third and fourth signals are concurrently reduced to zero or substantially zero thereby to produce a workpiece having constant thickness and crown.
Claim 16
Independent Claim
268 words
A method of concurrently controlling the delivery thickness and crown of a workpiece while it is being processed in a rolling mill which includes a pair of working rolls, each of which are supported by a back-up roll in a mill housing force applicator piston and cylinder means for adjusting under the rolling load the gap formed between said working rolls, said rolling mill further including roll bending piston and cylinder assemblies for exerting a roll bending force to apply bending moments to extended journals of the back-up rolls for changing the effective crown of said working rolls, said method comprising the steps of: generating a first signal representing a change in the roll gap due to a change in rolling load developed between said working rolls, generating a second signal representing a change in the relative position of the piston with respect to the cylinder of said force applicator, generating a third signal representing a change in the roll gap due to a change in said roll bending force, generating a fourth signal representing a change in the roll crown due to a change in rolling load, generating a fifth signal representing a change in the roll crown due to a change in said roll bending force, and controlling said force applicator piston and cylinder assembly and said roll bending piston and cylinder assemblies in such a way that the algebraic sum of said first, second, and third signals and the algebraic sum of said fourth and fifth signals are concurrently reduced to zero of substantially zero to thereby produce a workpiece having constant thickness and crown.
Claim 17
Independent Claim
268 words
A method of concurrently controlling the delivery thickness and crown of a workpiece while it is being processed in a rolling mill which includes a pair of working rolls, each of which are supported by a back-up roll in a mill housing force applicator piston and cylinder means for adjusting under the rolling load the gap formed between said working rolls, said rolling mill further including roll bending piston and cylinder assemblies for exerting a roll bending force to apply bending moments to extended journals of the back-up rolls for changing the effective crown of said working rolls, said method comprising the steps of: generating a first signal representing a change in the roll gap due to a change in rolling load developed between said working rolls, generating a second signal representing a change in the relative position of the piston with respect to the cylinder of said force applicator, generating a third signal representing a change in the roll gap due to a change in said roll bending force, generating a fourth signal representing a change in the roll crown due to a change in rolling load, generating a fifth signal representing a change in the roll crown due to a change in said roll bending force, and controlling said force applicator piston and cylinder assembly and said roll bending piston and cylinder assemblies in such a way that the algebraic sum of said first, second, and third signals and the algebraic sum of said fourth and fifth signals are concurrently reduced to zero of substantially zero to thereby produce a workpiece having constant thickness and crown.
Claim 18
Dependent Claim
225 words
An automatic control system for accurate concurrent control of the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including roll bending means for exerting a roll bending force to change the effective crown of said working rolls, said control system comprising: means for generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending means, means for computing the simultaneous influence said signals have on the delivery thickness and crown of a workpiece according to concurrent interrelationships between said signals, and control means associated with said force applicator means and said roll bending means for maintaining said concurrent interrelationships between said signals to yield a constant thickness and crown of a workpiece delivered from said rolling mill.
Claim 19
Dependent Claim
225 words
An automatic control system for accurate concurrent control of the delivery thickness and crown of a workpiece undergoing a thickness reduction in a rolling mill wherein, as incident to which the crown and thickness of the delivery workpiece normally change due to nonuniform characteristics of the entering workpiece, such as a change in the entry thickness, in the metallurgical composition, and in the workpiece crown, thereby producing changes in the elastic deformation of the rolling mill structure which includes a pair of working rolls supported in a mill housing having force applicator means for adjusting under the rolling load the gap formed between said rolls, said rolling mill further including roll bending means for exerting a roll bending force to change the effective crown of said working rolls, said control system comprising: means for generating a plurality of signals resulting from said nonuniform characteristics of the entering workpiece, from changes in said force applicator means, and from changes in said roll bending means, means for computing the simultaneous influence said signals have on the delivery thickness and crown of a workpiece according to concurrent interrelationships between said signals, and control means associated with said force applicator means and said roll bending means for maintaining said concurrent interrelationships between said signals to yield a constant thickness and crown of a workpiece delivered from said rolling mill.
Claim 20
Dependent Claim
234 words
In a rolling mill or the like apparatus having a housing for sUpporting a pair of processing rolls forming a roll gap which is subject to thickness and deflection variations due to the forces developed between the rolls during the processing of a workpiece, said rolling mill further including: force applicator means supported in said housing for adjusting the roll gap under the rolling load, roll bending means for exerting roll bending forces to change the effective crown of said processing rolls, a control including means for generating a first signal representing a change in the roll gap due to a change in the rolling load, position transducer means for generating a second signal representing a position change of said force applicator means, means for generating a third signal representing a change in said roll gap due to a change in the roll bending force, means for generating a fourth signal representing a change in effective roll crown due to a change in the rolling load, means for generating a fifth signal representing a change in the effective roll crown due to a change in the said roll bending forces, a first control means associated with said force applicator means for maintaining a predetermined relationship between said first, second and third signals, and a second control means associated with said roll bending means for maintaining a predetermined relationship between said fourth and fifth signals.
Claim 21
Dependent Claim
234 words
In a rolling mill or the like apparatus having a housing for sUpporting a pair of processing rolls forming a roll gap which is subject to thickness and deflection variations due to the forces developed between the rolls during the processing of a workpiece, said rolling mill further including: force applicator means supported in said housing for adjusting the roll gap under the rolling load, roll bending means for exerting roll bending forces to change the effective crown of said processing rolls, a control including means for generating a first signal representing a change in the roll gap due to a change in the rolling load, position transducer means for generating a second signal representing a position change of said force applicator means, means for generating a third signal representing a change in said roll gap due to a change in the roll bending force, means for generating a fourth signal representing a change in effective roll crown due to a change in the rolling load, means for generating a fifth signal representing a change in the effective roll crown due to a change in the said roll bending forces, a first control means associated with said force applicator means for maintaining a predetermined relationship between said first, second and third signals, and a second control means associated with said roll bending means for maintaining a predetermined relationship between said fourth and fifth signals.
Claim 22
Dependent Claim
24 words
In a rolling mill or the like apparatus according to claim 10 wherein said force applicator means includes fluid actuated piston and cylinder assemblies.
Claim 23
Dependent Claim
33 words
In a rolling mill or the like apparatus according to claim 11 wherein said position transducer means includes a load cell and spring assembly for detecting a displacement of said force applicator means.
Claim 24
Dependent Claim
69 words
In a rolling mill or the like apparatus according to claim 12 wherein said rolling mill further comprises: a back-up roll including extended journals for supporting each of said processing rolls, and outboard bearing chocks mounted on said extended journals in a force transmitting relationship with said roll bending means for applying bending moments to said back-up roll to change the effective crown of the processing roll supported thereby.
Claim 25
Dependent Claim
44 words
In a rolling mill or like apparatus according to claim 13 wherein said rolling mill further comprises a beam member for each of said back-up rolls constructed and arranged to equilibrate said roll bending forces in a manner independent of said force applicator means.
Claim 26
Dependent Claim
176 words
In a rolling mill or the like apparatus according to claim 14 further comprising means for combining said first, second and third signals according to the first expression Delta P/MG/P - ( Delta Q/Ms + Delta B/MG/B ) wherein said first control means reduces said first expression to zero and where said first signal represents Delta P/MG/P , said second signal represents Delta Q/Ms , and said third signal represents Delta B/MG/B , and where Delta P a change in the rolling load MG/P the modulus of the rolling mill parts, which modulus is a measure of the change in the roll gap due to a change in the rolling load Delta Q a change in the load acting on said position transducer means Ms modulus of said spring of said position transducer means Delta B a change in said roll bending force MG/B modulus of said processing and back-up rolls and associated mill parts which modulus is a measure of a change in the roll gap due to a change in said roll bending force.
Claim 27
Dependent Claim
136 words
In a rolling mill or the like apparatus according to claim 15 further comprising means for combining said fourth and fifth signals according to the second expression Delta P/MC/P -Delta B/MC/B wherein said second control means reduces said second expression to zero and where said fourth signal represenTs Delta P/MC/P , and said fifth signal represents Delta B/MC/B , and where MC/P the modulus of said processing and back-up rolls and associated mill parts, which modulus is a measure of a change in the effective crown of the processing rolls due to a change in the rolling load MC/B the modulus of said processing and back-up rolls and associated mill parts, which modulus is a measure of a change in the effective crown of the processing rolls due to a change in said roll bending force.
Claim 28
Dependent Claim
133 words
In a rolling mill or the like apparatus according to claim 16 further comprising: means for generating a sixth signal representing an initial, lock-on reference effective crown of the processing rolls due to said roll bending force according to the equation Bo/MC/B Po/MC/P - (CM + CT + C /D ) where Bo an initial, lock-on reference roll bending force signal Po an initial, lock-on reference rolling load signal CM the effective mechanical crown in said processing rolls CT the thermally induced effective crown in said processing rolls, C /D the desired crown in the workpiece after a thickness reduction in the rolling mill, and switching means operatively arranged for feeding said sixth signal to said second control means during a momentary period of tie when the workpiece first enter the rolling mill.
Claim 29
Dependent Claim
222 words
In a rolling mill or the like apparatus having a housing for supporting a pair of processing rolls forming a roll gap which is subject to thickness and deflection variations due to the forces developed between the rolls during the processing of a workpiece, said rolling mill further including: force applicator means supported in said housing for adjusting the roll gap under the rolling load, roll bending means for exerting roll bending forces to change the effective crown of said processing rolls, a control including means for generating a first signal representing a change in the roll gap and due to a change in he rolling load in which includes the influence of said roll bending force, position transducer means for generating a second signal representing a position change of said force applicator means, means for generating a third signal representing a change in effective roll crown due to a change in the rolling load, means for generating a fourth signal representing a change in the effective roll crown due to a change in the said roll bending forces, a first control means associated with said force applicator means for maintaining a predetermined relationship between said first and second signals, and a second control means associated with said roll bending means for maintaining a predetermined relationship between said third and fourth signals.
Claim 30
Dependent Claim
222 words
In a rolling mill or the like apparatus having a housing for supporting a pair of processing rolls forming a roll gap which is subject to thickness and deflection variations due to the forces developed between the rolls during the processing of a workpiece, said rolling mill further including: force applicator means supported in said housing for adjusting the roll gap under the rolling load, roll bending means for exerting roll bending forces to change the effective crown of said processing rolls, a control including means for generating a first signal representing a change in the roll gap and due to a change in he rolling load in which includes the influence of said roll bending force, position transducer means for generating a second signal representing a position change of said force applicator means, means for generating a third signal representing a change in effective roll crown due to a change in the rolling load, means for generating a fourth signal representing a change in the effective roll crown due to a change in the said roll bending forces, a first control means associated with said force applicator means for maintaining a predetermined relationship between said first and second signals, and a second control means associated with said roll bending means for maintaining a predetermined relationship between said third and fourth signals.
Claim 31
Dependent Claim
220 words
In a rolling mill or the like apparatus according to claim 18 further comprising means for combining said first and second signals according to the first expression wherein said first control means reduces said first expression to zero, and where said first signal represents ( Delta P/MG/P -( Delta P X MC/B/MG/B X MC/P)), and said second signal represents Delta Q/Ms , and further where Delta P a change in the rolling load MG/P the modulus of the rolling mill parts which modulus is a measure of the change in the roll gap due to a change in the rolling load, MG/B the modulus of said rolls and associated mill parts, which modulus is a measure of a change in the roll gap due to a change in said roll bending forces MC/B the modulus of said rolls and associated mill parts which modulus is a measure of a change in the effecTive crown of the processing rolls due to a change in said roll bending forces MC/P the modulus of said rolls and associated mill parts which modulus is a measure of a change in the effective crown of the processing rolls due to a change in the rolling load Delta Q/Ms a change in the displacement of said force applicator means as sensed by said position transducer means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |