Claims:1. A system for gauge control of a rolled product in a rolling mill comprising a plurality of stands arranged in tandem, the system comprising:
at least two thickness gauge means, wherein at least one thickness gauge means of said at least two thickness gauge means is installed between first and second stand wherein at least one thickness gauge means of said at least two thickness gauge means enables measurement of thickness of said rolled product emanating from the last stand;
at least one controller operatively coupled to said at least two thickness gauge means, wherein said at least one controller effects gap control in one, some or all of said plurality of stands and wherein said at least one controller effects inter-stand tension control of the rolled product; and
at least one speed controller operatively coupled to said at least two thickness gauge means and said at least one controller, wherein said at least one speed controller effects speed control of work roll motor(s) of said plurality of stands such that a ratio of factor k between any of said plurality of stands remains about 1 and wherein said factor k is a product of speed of the rolled product and thickness of the rolled product emanating from a stand of said plurality of stands.

2. The system as claimed in claim 1, wherein said rolling mill is an electro-mechanical screw down cold rolling mill comprising a plurality of stands arranged in tandem and wherein said rolled product comprises a cold rolled coil.

3. The system as claimed in claim 1, wherein said at least one controller effects gap control by means of at least one screw-down motor.

4. The system as claimed in claim 1, wherein said system further comprises at least one digital drive regulator for each of the work roll motor(s) of said plurality of stands to effect generation of firing angle for convertor of said work roll motor(s) based on speed reference signal from said at least speed controller.

5. The system as claimed in claim 1, wherein said system further comprises at least one swivel type control post associated with any one, some or all of said plurality of stands to enable monitoring and/or controlling rolling parameters to achieve desired output gauge of said cold rolled coil within a pre-defined tolerance limit.

6. The system as claimed in claim 4, wherein said pre-defined tolerance limit ranges from about +3% to about -3%.
, Description:TECHNICAL FIELD
[0001] The present disclosure generally relates to the technical field of tandem cold rolling mill. In particular, the present disclosure pertains to a system for gauge control of a rolled product in a tandem cold rolling mill.

BACKGROUND OF THE INVENTION
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Mills that find utility in metal forming process are generally categorized into various categories depending upon their operation and use. Tandem cold mill, in particular, finds special application when a requirement arises for processing (i.e. rolling) of metal rods/coils in a single pass instead of several passes as in case of a conventional reversible mill. For similar reasons, a tandem mill employs several stands (at least 2 stands), wherein successive reductions in diameters/thickness of metal rods/coils take place as per requirement. Depending upon nature of material to be worked upon, space considerations and the likes, number of stands can vary from 2 to 18.
[0004] Conventional mills, particularly Tandem Cold Mill (TCM), face constraints due to their inability to adjust gap and tension associated with their normal working operations, pertaining to stands involved therein. Moreover, due to lack of Automatic Gap Control (AGC) and Automatic Tension Control (ATC), they encounter challenges in attaining their maximum operating speed. In a TCM, depending on the grade and thickness reduction, the pass schedule is defined based on the metallurgical considerations. On account of these considerations, mills without level-II automation do not have a provision for pass schedule for rolling of different grades of Cold Roll (CR) coils.
[0005] While working with manually operated TCM, the desired thickness to be achieved is observed on the exit side of the mill. Once the desired thickness is achieved, the roll gap in each stand is maintained for other coils to be rolled (cold rolled to be specific). Moreover, without roll pass schedule, the roll force applied in each stand depends on the operator’s expertise. Similarly, up/down movement of the screw-down mechanism need to be controlled manually, by observing the reading from the display unit. Dependence on operator expertise leads to large deviations due to off gauge, strip breakage etc.
[0006] There is, therefore, a need to provide a system to obviate such aforementioned challenges in the art and to provide automatic gap and tension control mechanism for the tandem cold mill. Further, it would be an added benefit to enable saving and retrieval of pass schedule in tandem mill, particularly in electro-mechanical screw-down type tandem mill without level-II automation.
[0007] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
[0008] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about”. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[0009] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0010] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0011] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims.

OBJECTS OF THE INVENTION
[0012] Primary object of the present disclosure is to provide a system for gauge control of rolled product in a tandem cold rolling mill.
[0013] Another object of the present disclosure is to provide a system for gauge control in tandem cold rolling mill using minimum number of thickness gauge means.
[0014] Another object of the present disclosure is to provide a system for automatic control of gap between the work rolls of stands of tandem rolling mill.
[0015] Yet another object of the present disclosure is to provide a system for automatic control of inter-stand tension in a tandem rolling mill.
[0016] Another object of the present disclosure is to provide a system that can enable saving and retrieval of the roll pass schedule to decrease dependency on operator’s skills.
[0017] Another object of the present disclosure is to provide a control post with features of controlling and monitoring mill parameters at the discretion of an operator.
[0018] Another object of the present disclosure is to provide a system that provides fast data acquisition along human machine interface (HMI) for analysis of mill conditions while being in operation.
[0019] Another object of the present disclosure is to provide a system for gauge control of a cold rolled coil in an electro-mechanical screw down tandem mill that can enable wrap angle correction, mill speed correction and tension correction with provision for manual speed and tension adjustment.
[0020] These and other objects of the present invention will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings.

SUMMARY
[0021] The present disclosure generally relates to the technical field of tandem cold rolling mill. In particular, the present disclosure pertains to a system for gauge control of a rolled product in a tandem rolling mill.
[0022] An aspect of the present disclosure provides a system for gauge control of a rolled product in a cold rolling mill comprising a plurality of stands arranged in tandem, the system comprising: at least two thickness gauge means, wherein at least one thickness gauge means of said at least two thickness gauge means is installed between first two stands and wherein at least one thickness gauge means of said at least two thickness gauge means enables measurement of thickness of said rolled product emanating from the last stand; at least one controller operatively coupled to said at least two thickness gauge means, wherein said at least one controller effects gap control in one, some or all of said plurality of stands and wherein said at least one controller effects inter-stand tension control of the rolled product; and at least one speed controller operatively coupled to said at least two thickness gauge means and said at least one controller, wherein said at least one speed controller effects speed control of work roll motor(s) of said plurality of stands such that a ratio of factor k between any of said plurality of stands remains about 1 and wherein said factor k is a product of speed of the rolled product and thickness of the rolled product emanating from a stand of said plurality of stands. In an implementation, said rolling mill is an electro-mechanical screw down cold rolling mill comprising a plurality of stands arranged in tandem and wherein said rolled product comprises a cold rolled coil. In an implementation, said at least one controller effects gap control by means of at least one screw-down motor.
[0023] In an implementation, said system further comprises at least one digital drive regulator means for each of the work roll motor(s) of said plurality of stands to effect generation of firing angle for convertor of said work roll motor(s) based on speed reference signal from said at least speed controller. In an implementation said system further comprises at least one swivel type control post associated with any one, some or all of said plurality of stands to enable monitoring and/or controlling of rolling parameters to achieve desired output gauge of said rolled product within a pre-defined tolerance limit. In an implementation, said pre-defined tolerance limit ranges from about +3% to about -3%.
[0024] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0026] FIG. 1 illustrates an exemplary schematic architecture of a system for gauge control of a cold rolled coil in an electro-mechanical screw down tandem cold rolling mill, in accordance with an implementation of the present disclosure.
[0027] FIG. 2 illustrates an exemplary snapshot of Human Machine Interface (HMI) in accordance with an implementation of the present disclosure.
[0028] FIG. 3A illustrates an exemplary snapshot depicting installation of a drive regulator with armature convertor in accordance with an implementation of the present disclosure.
[0029] FIG. 3B illustrates an exemplary snapshot depicting installation of a digital tachometer in accordance with an implementation of the present disclosure.
[0030] FIG. 4 illustrates an exemplary snapshot of Human Machine Interface (HMI) depicting saving and retrieval of pass schedule in accordance with an implementation of the present disclosure.
[0031] FIG. 5A illustrates gauge control and tolerance variation achievable with a conventional system.
[0032] FIG. 5B illustrates gauge control and tolerance variation achievable with a system realized in accordance with implementations of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION
[0033] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0034] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[0035] Unless the context requires otherwise, throughout the specification which follow, the word “comprise” and variations thereof, such as, “comprises” and “comprising” are to be construed in an open, inclusive sense that is as “including, but not limited to.”
[0036] Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0037] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0038] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about.” Accordingly, in some embodiments, the numerical parameters set forth in the written description are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable.
[0039] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein.
[0040] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0041] The headings and abstract of the invention provided herein are for convenience only and do not interpret the scope or meaning of the embodiments.
[0042] Various terms as used herein. To the extent a term used in a claim is not defined, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0043] Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
[0044] The following discussion provides many example embodiments of the inventive subject matter. Although each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, then the inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed.
[0045] Embodiments of the present disclosure relate to a system (also known as gauge control system and both these terms used interchangeably hereinafter) for gauge control of cold rolled coil from Electro-mechanical Screw down tandem cold rolling mill. In an aspect, the present disclosure provides a system for gauge control selectively using two thickness gauges between pre-designated stands. Further, it provides a scheme of saving and retrieval of the roll pass schedule to decrease undue dependency on operator’s skills.
[0046] The present disclosure generally relates to the technical field of tandem cold rolling mill. In particular, the present disclosure pertains to a system for gauge control of a rolled product in a tandem rolling mill.
[0047] An aspect of the present disclosure provides a system for gauge control of a rolled product in a rolling mill comprising a plurality of stands arranged in tandem, the system comprising: at least two thickness gauge means, wherein at least one thickness gauge means of said at least two thickness gauge means is installed between first and second stand wherein at least one thickness gauge means of said at least two thickness gauge means enables measurement of thickness of said rolled product emanating from the last stand; at least one controller operatively coupled to said at least two thickness gauge means, wherein said at least one controller effects gap control in one, some or all of said plurality of stands and wherein said at least one controller effects inter-stand tension control of the rolled product; and at least one speed controller operatively coupled to said at least two thickness gauge means and said at least one controller, wherein said at least one speed controller effects speed control of work roll motor(s) of said plurality of stands such that a ratio of factor k between any of said plurality of stands remains about 1 and wherein said factor k is a product of speed of the rolled product and thickness of the rolled product emanating from a stand of said plurality of stands. In an implementation, said rolling mill is an electro-mechanical screw down cold rolling mill including a plurality of stands arranged in tandem and wherein said rolled product includes a cold rolled coil. In an implementation, said at least one controller effects gap control by means of at least one screw-down motor.
[0048] In an implementation, said system further includes at least one digital drive regulator means for each of the work roll motor(s) of said plurality of stands to effect generation of firing angle for convertor of said work roll motor(s) based on speed reference signal from said at least speed controller. In an implementation said system further includes at least one swivel type control post associated with any one, some or all of said plurality of stands to enable monitoring and/or controlling of rolling parameters to achieve desired output gauge of said rolled product within a pre-defined tolerance limit. In an implementation, said pre-defined tolerance limit ranges from about +3% to about -3%.
[0049] FIG. 1 illustrates an exemplary schematic architecture of a system for gauge control of a cold rolled coil in an electro-mechanical screw down tandem cold rolling mill, realized in accordance with an implementation of the present disclosure. As illustrated, a system 100 for gauge control of a cold rolled coil in an electro-mechanical screw down cold rolling mill includes a plurality of stands (shown at 102, 104, 106 and 108) arranged in tandem, at least two thickness gauge means (shown at 130 and 140), at least one controller (shown as 110) to effect gap control in one, some or all of the plurality of stands and to effect inter-stand tension control of the cold rolled coil, and at least one speed controller (shown as 120) to effect speed control of work roll motors of said plurality of stands (shown at 112a, 112b, 112c, 112d, 112e, 112f and 112g). In an implementation, said speed controller 120 can effect speed control of un-coiler and re-coiler, shown at 112h and 112i respectively. In an implementation, controller 120 can effect speed control of screw-down motor(s) of said plurality of stands (shown at 114a, 114b, 114c, 114d, 114e, 114f, 114g and 114h). Alternatively, any other configuration can be implemented, including but not limited to, implementation of one or a plurality of controller(s) in lieu of two controllers (110 and 120) to effect desired functionalities viz. gap control, inter-stand tension control and speed control of any or a combination of screw-down motor(s), work roll motor(s), un-coiler(s) and re-coiler(s), as known or appreciated by a person skilled in the art, without departing from the scope and spirit of the present invention.
[0050] As illustrated in FIG. 1, in an implementation, one thickness gauge (shown as 130) is installed between stand 1 and stand 2 to achieve coarse control of thickness by providing feedback control in stand 1 and feed forward control in stand 2 and another thickness gauge (shown as 140) is installed after stand 4 to enable measurement of thickness of the cold rolled coil emanating from the last stand (stand 4) and to achieve fine correction in desired thickness through feedback control in stand 3 and 4. Alternatively, any number thickness gauge(s) can be utilized with their arrangement, as known to or appreciated by a person skilled in the art without departing from the scope and spirit of the present invention.
[0051] As also illustrated in FIG. 1, swivel type control posts (shown as 116a, 116b, 116c, 116d, 116e and 116f) can be provided, associated with any one, some or all of the stands (shown as 102, 104, 106 and 108) for monitoring and/or controlling rolling parameters to achieve desired output gauge of said cold rolled coil within a pre-defined tolerance limit. FIG. 2 illustrates an exemplary snapshot of swivel type control post Human Machine Interface (HMI) depicting a plurality of stands 102, 104, 106 and 108 arranged in tandem, work rolls 202, 204, 206 and 208, thickness gauge means 130 and 140, un-coiler 210, re-coiler 212 and screw-down motors in accordance with an implementation of the present disclosure. In an implementation, said pre-defined tolerance limit ranges from about +10% to about -10%. Preferably, said pre-defined tolerance limit ranges from about +5% to about -5%, and most preferably ranging from about +3% to about -3%. In an exemplary implementation, two control posts are provided for each of the stands 1 and 4 and one control post is provided for each of the stands 2 and 3. Alternatively, any number of control posts can be provided, operatively coupled to any one, some or all of the stands to serve its intended purpose as laid down in disclosure of the present invention.
[0052] In an implementation, at least one digital dive regulator is provided for any one, some or all of roll motor(s) for generating firing angle for convertor of said work roll motor(s) based on speed reference signal from the speed controller 120. In an implementation, separate digital drive regulator(s) are provided for re-coiler, un-coiler and screw-down motors. In an implementation, digital drive regulators for the work roll motor(s), re-coiler, un-coiler and screw-down motor(s) can be interfaced with the speed controller 120. In an implementation, as shown in FIG. 3B, digital tachometer can be used for speed feedback loop. As illustrated in FIG. 3A, digital dive regulator(s) can be interfaced with the armature convertor through Pulse amplifier. The DC motors preferably have dual armature in parallel from the same convertor and hence, for current balancing of both the armatures, separate field convertors are used. Further, the system includes under-current and over-current relays. In an implementation, the drive regulator can include Power Electronic Controller card over Ethernet (PECe) as core part of the system. The drive regulator can use an EtherCAT communication protocol between Power Interface Board over Ethernet (PIBe) and it can communicate to the controller 120 via Ethernet. The drive regulator can use an EtherCAT communications protocol over Ethernet to ensure a high speed deterministic communications link (256 digital I/O in 12µs). This high-speed link allows the CPU to implement the drive control loops (current, speed, position etc.) and generate device firing patterns, using feedback signals that are transferred via EtherCAT to and/or from the PIBe.
[0053] In an implementation, load cell(s) can be provided for measurement of roll force and measurement of inter-stand tension. In an implementation, thickness gauges and load cell(s) for roll force measurement and inter-stand tension measurement are interfaced with controller 110 for gap and tension control through ethernet cable to ethernet switch and then to the controller through fiber optic cable through LIU and patch chord.
[0054] In operation, the roll force is applied on the cold rolled coil (alternatively referred to as sheet or strip) while rolling, through the screw down motors. In each stand, screw down motor(s) applies the balanced roll force along the width of strip. The desired gauge can be achieved by applying the adequate roll force on the strip by controlling the gap between work rolls. Inter-stand tension control is also important because a proper tension between each stand prevent breakage of strip while reduction in thickness is taking place in the stands. A proper tension is also required between the un-coiler, stands and re-coiler for proper unwinding at un-coiler and winding of the cold rolled coil at the re-coiler. The speed controller 120 controls the speed of work roll motor(s) of each of the stands (102, 104, 106 and 108) such that a ratio of factor k between any of the stands remains about 1 (preferably ranging from 0.9 to 1.1). The factor k is a product of speed of the cold rolled coil and thickness of the cold rolled coil emanating from any of the stands. The thickness gauge placed after stand 1 measures the thickness of strip and compares it with the desired thickness, and in case of any deviation, feed the error signal to the controller 110 and speed controller 120, which then sends the signal to the drive regulator(s) of mill motor(s) for correction of speed and to the screw down motor(s) for applying the desired roll force. Similarly, the inter-stand tension measured by load cells is also compared with the set inter-stand tension and in case of any deviations, error signal is sent to the controller 110 and 120 for preceding and succeeding stand speed correction. Since, the electro-mechanical screw down is a slow response mill as compared to hydraulic gap control, provision of manual interventions such as tension and speed adjustment buttons can be provided by means of control post(s). The control posts are connected to the programmable logic control (PLC), which is then interfaced with controller through ether switch and ether cable. The hydraulic driven mechanism on the entry and exit of the mill are connected to programmable logic controller (PLC) and then to controller through Ethernet cable. The engineering work station, fast data analyzer, drive window, HMI etc. are interfaced with controller through Ethernet switch and Ethernet cable. The soft logic developed in the system can take care of the wrap angle correction with change in diameter of work roll to give correct reading of the inter-stand tension.
[0055] Since the system, realized in accordance with implementations of the present disclosure, does not include level-II automation, where percentage thickness reduction in each stand for a particular grade of coil can be measured and/or desired output thickness can be downloaded to system, the system includes a provision for saving a particular pass schedule where all rolling parameters can first be added by the operator and when the desired gauge is obtained within pre-defined tolerance, the pass schedule can be saved and recalled for rolling of the similar coils/strips. FIG. 4 illustrates an exemplary snapshot of Human Machine Interface (HMI) depicting saving and retrieval of pass schedule in accordance with an implementation of the present disclosure.
[0056] FIG. 5A and FIG. 5B illustrates difference between gauge control and tolerance variation achievable with the conventional system and those achievable with the system, realized in accordance with implementation of the present disclosure. As can be observed, unlike with conventional systems, which exhibits close to 20% variation in the gauge along the length of cold rolled coil, utilization of advantageous system, realized in accordance with implementations of the present disclosure, can produce cold rolled coils that has gauge within 2% of the desired gauge in 96% of the cold rolled coil length.
[0057] Now, in an aspect, for instance where the desired gauge is obtained within the tolerance, the pass schedule can be saved and recalled for rolling of the similar campaign of the coil to be rolled. The data base built can help in reducing the dependency on the operator’s expertise. In order to better appreciate this feature, a screen shot for saving of pass schedule has been illustrated in FIG. 4.
[0058] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[0059] The present disclosure provides a system for gauge control of rolled coil in an electro-mechanical screw-down tandem mill.
[0060] The present disclosure provides a system for gauge control in electro-mechanical screw down tandem mill using minimum number of thickness gauges.
[0061] The present disclosure provides a system for automatic control of gap between the work rolls of stands of tandem mill.
[0062] The present disclosure provides a system for automatic control of inter-stand tension.
[0063] The present disclosure provides a system that can enable saving and retrieval of the roll pass schedule to decrease dependency on operator’s skills.
[0064] The present disclosure provides a control post with features of controlling and monitoring the mill parameters.
[0065] The present disclosure provides a system that can enable controlling and monitoring of mill parameters from a single control post.
[0066] The present disclosure provides a system that provides fast data acquisition along human machine interface (HMI) for analysis of mill conditions while being in operation.
[0067] The present disclosure provides a system for gauge control in electro-mechanical screw down tandem mill that can enable wrap angle correction, mill speed correction and tension correction with provision of manual speed and tension adjustment.