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US3169420A - Apparatus for tensioning strip - Google Patents

Apparatus for tensioning strip Download PDF

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Publication number
US3169420A
US3169420A US41051A US4105160A US3169420A US 3169420 A US3169420 A US 3169420A US 41051 A US41051 A US 41051A US 4105160 A US4105160 A US 4105160A US 3169420 A US3169420 A US 3169420A
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United States
Prior art keywords
strip
tension
roller
pivot
force
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Expired - Lifetime
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US41051A
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English (en)
Inventor
Morris D Stone
Jeremiah W O'brien
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United Engineering and Foundry Co
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United Engineering and Foundry Co
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Publication date
Application filed by United Engineering and Foundry Co filed Critical United Engineering and Foundry Co
Priority to US41051A priority Critical patent/US3169420A/en
Priority to ES0267417A priority patent/ES267417A1/es
Priority to FR861978A priority patent/FR1289868A/fr
Priority to DE19611402710 priority patent/DE1402710A1/de
Priority to NL265299D priority patent/NL265299A/xx
Priority to GB23006/61A priority patent/GB989059A/en
Application granted granted Critical
Publication of US3169420A publication Critical patent/US3169420A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/003—Regulation of tension or speed; Braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide

Definitions

  • This invention relates to a method of and an apparatus for accurately measuring, constantly controlling and rapidly varying tension imposed upon a strip of material while passing between two or more units and, in particular, to a method and apparatus by which tension imposed upon strip material may be constantly and accurately controlled, determined and varied irrespective of and within practical limits of the distance the strip may be deflected away from a straight line plane during its travel between the units.
  • strip deflecting or strip tension indicating devices are limited to one particular mode of operation, that is to say that they either operate to maintain the strip taut or to indicate tension.
  • gauge control is of paramount importance to the producer as well as to the consumer of the rolled strip. Because of the multitude of variances inherently present in the rolling of various types and grades of metals having different metallurgical characteristics and which are rolled under different conditions depending on the desired result, it is highly desirable in order to improve the uniformity of strip gauge to provide an efiicient and eifective means of operating the respective mills, under several different predetermined ten sion conditions.
  • the mills can be operated either under varying degrees of tensions or under conditions where the tensions are maintained substantially constant in all mills, or under other conditions where a predetermined variable tension is imposed upon the strip in all or substantially all stands.
  • the strip tensioning devices will work in conjunction with the mill motors or the mill screwdowns.
  • Various combinations of two or more of these different modes of operation can be attained by embodying the features of the invention in the operation of the various stands of the mill.
  • the present invention provides a method of rolling in which a constant tension and/or a variable controlled tension may be imposed on the strip while it passes through a tandem mill in which the longitudinal gauge and width will be controlled so that variation in thickness can be corrected.
  • Another object of this invention is to provide a loop forming strip tensioning device, the elements of which are so arranged and related to one another and to the mill and strip that for a given actuating ressure exerted upon the device the tension of the strip is maintained substantially constant over the entire range of heights to which the strip may be deflected above the pass line by the device.
  • a further object of this invention is to provide a loop forming strip tensioning device by which the tension imposed upon the strip may be held substantially constant and readily varied simply by varying the actuating forces exerted upon the device irrespective of the distance the strip may be deflected away from the pas line on normal operation of the device.
  • An additional object of this invention is to provide a strip tensioning device by which existent strip tension as the strip is passed from one unit to another may be readily ascertained for any and all varying heights of the strip loop above the pass line.
  • Another object of this invention is to provide a strip deflecting device that may be selectively employed to impose a constant tension on a strip passing thereover or a controlled variable tension or it may be used to measure tension.
  • Still a further object of this invention is to provide a strip tensioning device in combination with a pair of rolling mills having elements associated therewith for controlling the speed of at least one of the mills for maintaining the height of the loop substantially constant.
  • Another object of this invention is to provide adjustable means for the tensioning device adapted to maintain the predetermined geometrical relation of the elements thereof.
  • Another object of this invention is to provide a loop forming strip tensioning device which is inexpensive to manufacture and relatively simple and accurate of operation.
  • One of the forms of the invention disclosed herein embodies a strip loop forming tension roller for engaging and applying a transverse force to one face of strip material passing from one rolling mill to another for processing. It is one of the features of this invention that the major portion of the elements making up the device, especially the actuating and control elements thereof, may, if such be desired, be located a substantial distance away from the pass line of the strip. This is particularly important and especially advantageous when hot strip material is being processed in the mills.
  • the tension roller in one embodi- .ment, is supported upon a pivotal shaft located adjacent to the strip pass line, which has a pair of struts connected thereto at one end which struts, in turn, are also connected to a pair of pressure actuated extensible struts secured to a pivotal shaft located a substantial distance away from the pass line.
  • FIG. 1 is a plan View of a loop forming strip tensioning device embodying the features of the invention described herein arranged between two rolling mills;
  • FIG. 2 is' a side elevational view of the device shown in FIG. 1 illustrating, in addition, the rolls of the mills;
  • FIG. 3 is a schematic diagram of the control system employed with the device disclosed; a I FIG. 4 is a force diagramfor the strip shown in FIG. 2; v t FIG. 5 is a free body diagram for the bell crank shown in FIG. 2;
  • FIG- 6 is a second force diagram for the purpose of facilitating a discussion of the physical embodiments of the preferred arrangement.
  • FIG. 7 is a schematic elevational view of a tandem rolling mill adapted to practice the rolling methods disclosed herein. 7 i I
  • a loop forming strip tensioning device 11 by which strip S passing from one unit to another, such as for example, from rolling mill 12 to rolling mill '13, is deflected upward from the normal horizontal pass line defined between themills to form a loop that may be varied considerably in height depending upon the slack between the mills and the limit of travel-of the device 11.
  • the device 11 comprises an idle tension roller 14 rotat- -ably supported in suitable bearings at the ,outer end of an apron 15 which is supported in turn at its inner end upon a pivot 16 secured in bearings 17 conveniently 'afiixed to the faces of the mill housing posts'18 and 19 of mill 12.
  • the pivot 16 has been located adjacent to and slightly below the strip pass line, the distance from the pass line being equal to the radius of the tension roller 14. v This distance, of course, can be varied as conditions dictate without departing from the scope of the invention disclosed;
  • a strut 21 which is provided with a pivot 22 at the lower outer end.
  • the apron 15 and strut21 take the form of a bell crank which term will be used to refer to .these elements -he reafter.
  • a second strut designated generally by numeral 23 comprising a cylinder assembly 24 from which extends its piston rod 25, having at its outer end a clevis 26 threaded thereon and secured for pivotal movement to the pivot 22.
  • each which is provided with a pivot 22 at the lower outer end. of an arm 28 secured to a shaft 29 rotatably supported in bearings 31 secured to the foundation adjacent to the shoe plates of the mill.
  • a lever 32 to the outer end of which there is pivotally secured a rod 33 which is threaded for a portion of its length at the upper end.
  • the threaded end portion of the rod passes through a gear box 34, as best seen in FIG. 1, in which the threads of the rod are engaged with a centrally threaded worm wheel which is engaged with a suitable worm rotated by a handwheel 35.
  • the threaded worm wheel is suitably supported within the gear box 34 to prevent its being displaced vertically when rotated, the threaded rod consequently will move up or down depending upon which direction the wheel 35 is rotated.
  • On the shaft of the handwheel there is a sprocket 36 over which passes an endless chain 37 which engages with a sprocket'38 of a counter 39 positioned adjacent to the handwheel 35.
  • the rod 33 On rotation of the handwheel 35, the rod 33 will move up or down depending upon the direction of rotation and, consequently, the pivot 27, due to the movement of the lever 32, will also be moved to a new position.
  • a piston cylinder assembly 41 is provided with the cylinder 42 thereof pivotally connected to a bracket 43 and the outer end of the piston rod 44 connected to the apron 15.
  • the piston cylinder-assembly 41 serves as a stop for supporting the roller 14 and the assembly connected to the piston rod 44 at the lowest position determined by the final low position of the piston rod.
  • the lowest position of the roller 14 is such that the upper surface thereof extends slightly above the horizontal pass line of the strip so that strip in passing thereover will have a slight loop in it even before the roller 14 is pivoted upward.
  • FIGURE 3 there is shown an exemplary control system that'will permit the tensioning device to be em ployed in one'of three separate modes, namely as a constant strip tension exerting device, asa variable controlled .strip tension exerting device to effect strip gauge control or' as a strip tension measuring device in which in each of the modes of operation the result desired will be independent of the position of the looper roller.
  • a constant strip tension exerting device as a variable controlled .strip tension exerting device to effect strip gauge control or' as a strip tension measuring device in which in each of the modes of operation the result desired will be independent of the position of the looper roller.
  • the arrangement could be appreciably simplified; However, in order to afford a full and complete understanding of the merits of the tensioning device disclosed herein, a more comprehensive arrangement has been selected wherein a single system will etfect the three separate modes of operation.
  • a strip thickness measuring device 45 is provided on the delivery side of the mill 13 which in the form shown is an X-ray device, but which could be other types of apparatus, such as a mill load indicator unit or the like.
  • the X-ray device 45 is electrically connected to summarizer amplifier 46 by electrical lines L and L to which also are connected lines L and L running from a potentiometer 47 having input lines L and L extending from a voltage source not shown.
  • a voltmeter St is provided across lines L and L and serves to measure and indicate the voltage output of the potentiometer 47.
  • the amplifier se is connected electrically to a permanent magnetic unit 48 including a moving coil through lines L and L; which is adapted to cooperate with an hydraulic proportioning control unit 4 (sometimes hereinaiter referred to as an hydraulic regulator) which is, as are all the other components employed in the system, a commercially available unit, designed to convert a variable electrical input into a proportional hydraulic output.
  • an hydraulic proportioning control unit 4 sometimes hereinaiter referred to as an hydraulic regulator
  • the unit 49 consists of a double acting cylinder 51 having a piston 52 and a rod 53, the rod thereof being connected and serving to actuate the spool element of a pressure regulating valve s4.
  • the piston 52 is provided with two internal passageways, one communicating with the front and the other with the back thereof and wherein one of their ends terminates at the bottom of the piston into a common orifice 55.
  • a pilot as is pivotally arranged to discharge fiuid conducted thereto from a pump 57 into the orifice Movement of the piston 52 is accomplished by causing the pilot se to pivot by means of an horizontal mechanical force created by the magnetic coil 48.
  • This action effects a movement of the pressure regulator valve 54 in which case the pressurized fluid issuing from the valve is fed to a Bourbon tube 58 through piping 59 where the fluid pressure is converted into a proportional horizontal mechanical force that is applied to the right side of the pilot, so that when this pressure balances the pressure of the magnetic unit 48, the proper cylinder pressure will obtain and be so maintained at all times so long as there is no change in the voltage output of the amplifier 46.
  • the hydraulic medium for the main system is pumped from a sump 6% by a pump 61 and is delivered to the pressure re ulator valve 54 through piping 62.
  • the bydraulic output of the valve 5 as effected by the position of its center land 64 relative to the port 65, is delivered into piping as which communicates with a main control valve as.
  • the main control valve 67 is connected to the rear of cylinder 24 by piping 66a and a constant pressure is exerted in the cylinder 24 of the strip tensioning assembly 11.
  • a pressure switch 661) is provided for a purpose to be explained hereinafter.
  • the spool of the main control valve 67 having lands 63 and 69 which cooperate with the ports 7%) and 71 respectively is urged by a spring 72 in one direction and in the opposite direction by the fluid of an auxiliary valve 73, the intake fluid oi which may be interrupted by a plunger 74 of a solenoid valve 75.
  • a valve 76 of a type similar to the valve 67 is connected by piping 77 to the pump 61 and by piping 79 to the front of the cylinder 24, whereby fluid under pressure can be admitted to the front of the cylinder for the purpose of lowering the roller 14.
  • the spool of this valve is provided with three lands, namely 81, 82 and 83, which cooperate with ports 84, 85 and 86 respectively.
  • the opposite axial movement of the spool is effected by a spring 37 and the fluid pressure of an auxiliary valve 88 which cooperates with a solenoid valve 89, both valves being similar in construction and operation to the valves 73 and 75.
  • a second voltmeter 91 is provided being connected to a hydraulic-electric conversion unit 92 located immediately adjacent to the rear of the cylinder 24 so that the pressure losses of the system can be readily determined whereby the potentiometer 47 can be adjusted to compensate for such losses as indicated by comparing the readings of the voltmeters 5t and 91.
  • These voltmeters are, accordingly, calibrated in pounds of strip tension and, in addition, the meter l serves as the tension metering gauge and as an electrical transmitter, the function of which will be more fully explained hereinafter.
  • the potentiometer 47 has, of course, previously been set at the desired tension value which results in a corresponding electrical impulse being fed to the amplifier through lines L and L
  • the output of the amplifier which represents a summation of the two aforesaid electrical impulses, is fed to the magnetic unit it; and the vertical movement of its coil is converted into a horizontal force which acts on the one side of the balanced pivoted pilot 56 of the hydraulic regulator 49.
  • the other side of the pilot 56 is subjected to the hydraulic pressure of the Bourdon tube 58 which is converted into a horizontal mechanical force.
  • both solenoids 75 and 89 are caused to be energized, by suitable means not shown, whereby the spools of the valves 67 and 7e are forced hydraulically to the left so that the lands 82 and 83 of the valve 76 cover the ports E and $6 and the lands 68 and 69 of the valve 67 clear the ports 70 and 71. Consequently, fluid is caused to be admitted only to the rear of cylinder 24.
  • the pressure will be regulated by the relative position of the land 64 with respect to the port of the pressure regulator valve 54, which position is determined by the location of the piston 52 of the hydro-proportioning control unit 4-9.
  • the hydraulic pressure admitted to the rear of the cylinder 24 is made directly proportional to the differential in the gauge varia tion, which pressure represents either the total or partial necessary correcting force which must be imposed upon the arms 21 of the strip tensioning unit 11. Whether or not this pressure is equal to the necessary correcting force will depend on the multiplying eiiect of the linkage system of the tension unit ll. As more fully explained hereinafter, the correcting pressure, while it may vary pursuant to the output of the amplifier as, will not be aliected by the varying positions of the roller 14. in other words, such pressure will be at all times directly proportional to the fluid pressure of the regulator valve 54.
  • the potentiometer 47 is regulated until the reading of the voltmeter 50 corresponds to the desired tension value and, since there will be no strip thickness oil-gauge signal from the X-ray unit 45, the amplifier 45 will transmit an impulse proportional to the voltmeters reading and the proportioning control unit 4-9 will in turn cause the proper pressure to be admitted to the rear of the cylinder 24.
  • the other valves and elements will assume the same positions and functions in the same manner as in the case where the tensioning device was employed to correct for gauge inaccuracy, as previously discussed.
  • the solehold 75 is de-energ'med to permit plunger 74 thereof to interrupt the flow of fluidinto the right side of the valve 67 so that the spring '72 thereof will force the spool'to the right, as one views FIG. 3, and cause the land 68 to cover the input port 71 whereby fluid in the cylinder 24 is prevented from escaping through the valve 67.
  • the position of the spool of the valve 76 remains unchanged and as previously mentioned covers the ports 85 and 86 so that no fluid can be admitted to the front of the cylinder 24 nor escape from .the opposite end.
  • the necessary drain ports and piping are provided in order to complete the hydraulic circuit and facilitate the lowering of the roller 14 on the reverse operation of the cylinder 24. It is considered to be suflicient to point out that the piston of thercylinder is retracted to lower the roller 14 by de-energizing both solenoids 75 and 89 thereby effecting movement of the lands 82 and 83 of the valve 76 and the lands 68 and 69 of valve 67 to open the ports 85 and 86 in the former and to close the port 71 in the latter. Pressure will then be .admitted to the front of the cylinder through piping 79 and permitted to escape from the rear of the cylinder 24 through drain piping connected to the valve 76.
  • the hydraulic-electrical conversion unit 92 in addition to being connected to the voltmeter 91, may be connected to a speed control unit 95, which cooperates with the mill motor 93 whereby the mill speed will be regulated to adjust the tension of the strip.
  • an electrical control system for the motor 93 of the mill 13 is provided.
  • This system in conjunction with the mill motor 93, consists of a generator 94- connected thereto by lines L and L 0.
  • the generator is in turn electrically connected to a control unit 95 and a speed regulator 96, the regulator being connected to a potentiometer 97.
  • the potentiometer is actuated by rotation of the shaft 16 as the roller 14 is raised or lowered.
  • a pressure switch 66b is connected into the piping 66a and is designed to operate at a preselected drop in pressure in the piping 66a.
  • the pressure switch 66b is electrically connected to the solenoid valve 75 and causes the energization of the solenoid when a low pressure condition occurs thereby causing the valve 67 to open to admit fluid into the cylinder 24 to raise the roller 14 in pursuit of the strip.
  • the tensioning unit When the roller14 engages the strip, the tensioning unit will operate in its constant tension mode. Immediately on the raising of the roller 14, the potentiometer 97 will come into operation and effect a speed adjustment of the mill motor 93 thereby reducing the preferably midway between the extreme upper and lower positions.
  • the aforesaid relationship can be expressed in several other ways, as for example, in terms of the relationship that the torque developed by the linkage system has to the strip tension and the portion of the arm that carries the tension roiler.
  • the algebraical expression for the relationship is Tr. soapyg sin where T is the torque about point (see FIG. T is the strip tension and the angles a and b are, as indicated above, and a is the angle between the arm of the tension roller and the pass line.
  • a finishing train of a tandem hot strip mill consisting of succeeding roll stands, namely 101, 102, 103, 104-, 105 and 106, in which at the delivery side of the first five stands strip'tensioning devices 107, 1%, 109, 111 and 112 are arranged, each of which can be operated in one of the three modes described heretofore, i.e., as a constant tension exerting means, a variable controlled strip tension exerting device and as a tension metering means, respectively.
  • the strip tension devices 107, 103 and 109 are actuated to exert a constant tension on the strip as it passes between the mills 101 and 102, 102 and 103, and 103 and 104.
  • the last two tension units 111 and 112 are employed as gauge control devices and, accordingly, X-ray strip thickness gauges 113' and 114 are provided, the gauge 113 co-operating with the strip tension device 111 and the gauge 114- With the strip tension device 112.. These units are adapted to function in the manner heretofore discussed.
  • the strip tensioning device may be operated to effect gauge control by imposing a correction force that will, in eifect, be a Vernier correction in the longitudinal gauge variation, the net result of the combined applications of the modes being to eifect a more uniform rolled strip.
  • a method of rolling in which all the tensioning devices are employed to impose a variable controlled strip tension to effect strip gauge control in all or substantially all of the stands may be utilized.
  • a device for imposing a tension upon strip defining a pass line between two units comprising a first pivot, a roller, an arm connected to said roller and connected to and adapted to be angularly displaceable about said pivot for causing the roller to engage one face of and force said strip away from said pass line at varying distances thereby to impose a tension upon said strip, the ratio between the strip deflecting force imposed by said roller and the tension developed in said strip by said force varying with the distances said strip is displaced away from said pass line, a first strut rigidly connected at said first pivot to and for displacing said arm, a second pivot spaced from said first pivot and a force actuated extensible strut connected at one end to said second pivot and at its opposite end to the other end of said first strut, said arm, struts, pivots and roller being operatively arranged with respect to each other, to the distance between the units and to the varying distances of the strip relative to said pass line so that the ratio between the force exert
  • a device for imposing a tension upon strip defining a pass line between two units according to claim 1 in which the arm is connected between said roller and said first pivot and so positioned with respect to said strip that an imaginary line passing through said pivot and the center of said roller bears a non-parallel relation ship to the strip when the strip is deflected away from said pass line.
  • a device for imposing a tension upon strip between two units according to claim 2 in which said arm is connected to said roller and said first pivot, and said first strut is angularly disposed about said first pivot relative to said arm.
  • a device for imposing a tension upon strip between two units according to claim 1 in which said arm is connected to said roller and said first pivot, and means connected to said extensible strut for applying a constant force in a direction to extend said extensible strut.
  • a device for imposing a substantially constant tension upon strip between two units comprising a first pivot, a roller, an arm connected to said roller and adapted to be angularly displaced about said pivot for causing said roller to engage one face of and imposing a tension upon said strip, a first strut connected at one end to said arm at said pivot, a second pivot, one of said pivots being adjustable relative to the other, a force actuated extensible strut connected at one end to said second pivot and at its opposite end to the other end of said first strut, and means connected to and for selectively positioning said adjustable pivot.
  • a device for imposing a tension upon a continuous strip defining a pass line between two units comprising a tension roller adapted to bear against one face of said strip, a fixed pivot adjacent to said pass line, a member connecting said roller and said fixed pivot, a first strut connected at one end to said member and angularly displaced about said fixed pivot relative to said member, an adjustable pivot remote from said pass line, an extensible strut connected at one end to said adjustable pivot and at its opposite end pivotally connected to the other end of said first strut, and-means connected to and for selectively displacing said adjustable pivot with respect to said fixed pivot thereby to establish a desired relationship in space between said struts and said roller.
  • a device for imposing a tension upon a strip defining when undeflected a pass line between two units, the deflected strip and the pass line forming a triangle, of which the pass line constitutes the sides of two acute angles comprising a first pivot, an arm connected to and adapted to be angularly displaced about said pivot, a roller connected to the other end of said arm for engaging one face of and deflecting said strip away from said pass line thereby to impose a tension upon said strip, a first strut having one end connected to said arm, a second pivot and a force actuated extensible strut connected at one end to said second pivot and at its opposite end to the other end of said first strut, said arm, struts, pivots and roller being operatively arranged with respect to each other, to the distance between the units and to the position of the strip as deflected that a substantially constant value is obtained for the following expression:
  • a device for imposing tension upon a strip defining, when undefiected, a pass line between two succeeding units, the deflected strip and the pass line forming a triangle of which the pass line constitutes one of the sides of two acute angles, comprising a movable member adapted to be engaged with the strip at varying heights of loops and imposed a force thereon, the ratio between the strip deflecting force imposed by said movable member and the tension employed in said strip by said force varying with the distances said strip is displaced away from said pass line, a linkage system comprising at least two connected links, one at least being a variable length link, one end of each link being connected to one of two spaced-apart pivot points, said movable member and one of said links being connected together at one of said pivot points, at least one of said links being substantially non-parallel to the strip at any position of said movable member, means for generating a mechanical effort connected to said linkage system, said movable member and said linkage system being connected together and
  • a device for measuring or imposing tension upon a strip defining, when undefiected, a pass line between two succeeding rolling mills, the deflected strip and the pass line forming a triangle of which the pass line constitutes one of the sides of two acute angles, comp1is ing a movable member adapted to be engaged with the strip at varying heights of loops, a linkage system com- I prising at least two connected links, one at least being a variable length link, one end of each link being connected to one of two spaced-apart pivot points, said movable member and one of said links being'connected together at one of saidpivot points, at least one of said links being substantially non-parallel to the strip at any position of said movable member, a force generating means connected to said linkage system, said movable member and said linkage system being connected together and operatively arranged with respect to each other, to the distance between the rolling mills and to the position of the strip as deflected, such that a substantially constant value
  • a and b are acute angles formed by the deflected strip and said pass line, and a and b are acute angles formed by the two links and an imaginary line passing through said two pivot points.
  • a device for measuring or imposing tension upon a strip defining, when undeflected, a pass line between tWo succeeding rolling mills, the deflected strip and the pass line forming a triangle of which the pass line constitutes one of the sides of two acute angles, comprising a first pivot, a movable member, an arm connected to said member and adapted to be angularly displaceable about said first pivot forcausing said member to engage one face of and force said strip away from said pass line at varying distances thereby to impose a tension upon saidstrip, a linkage system comprising at least 'two connected links, one at least being a variable length link and one end of each link'being connected to second and third spaced-apart pivot points, said movable member and one of said links being connected together at.
  • a device for engaging a strip passing between two succeeding rolling mills adapted to be selectively employed to impose a constant tension on said strip or a variable tension to eifec't gauge control, or to measure the magnitude of the tension on said strip, comprising a movable member adapted to engage and from a loop in said strip of varying heights, force generating means, a linkage system connecting said member to said force generating means and so arranged and disposed that a direct, substantially constant, relationship is maintained -with respect to the tension imposed upon said strip and the force applied thereto irrespective of the position of said member, a force gauge associated with said force generating means for measuring the force within said force generating means, a strip thickness measuring device associated with said force generating means, control means associated with said force generating means and said force gauge and said strip thickness measuring device, adapted to' selectively effect an exerting of a constant'forc-e over the'total travel of said member, or a variable force, or a measuring of the force within said force generating means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
US41051A 1960-07-06 1960-07-06 Apparatus for tensioning strip Expired - Lifetime US3169420A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US41051A US3169420A (en) 1960-07-06 1960-07-06 Apparatus for tensioning strip
ES0267417A ES267417A1 (es) 1960-07-06 1961-05-16 Dispositivo y metodo para imponer una tensiën sobre una tira continua que define una linea de paso entre dos unidades
FR861978A FR1289868A (fr) 1960-07-06 1961-05-16 Procédé et appareil pour mesurer une tension physique exercée sur une bande
DE19611402710 DE1402710A1 (de) 1960-07-06 1961-05-25 Schlingenheber
NL265299D NL265299A (de) 1960-07-06 1961-05-30
GB23006/61A GB989059A (en) 1960-07-06 1961-06-26 Improvements in or relating to strip tensioning methods and apparatus

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Application Number Priority Date Filing Date Title
US41051A US3169420A (en) 1960-07-06 1960-07-06 Apparatus for tensioning strip

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US3169420A true US3169420A (en) 1965-02-16

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US41051A Expired - Lifetime US3169420A (en) 1960-07-06 1960-07-06 Apparatus for tensioning strip

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US (1) US3169420A (de)
DE (1) DE1402710A1 (de)
ES (1) ES267417A1 (de)
FR (1) FR1289868A (de)
GB (1) GB989059A (de)
NL (1) NL265299A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350904A (en) * 1965-01-21 1967-11-07 United States Steel Corp Deflector roll repositioning assembly
US3397566A (en) * 1965-10-22 1968-08-20 Inland Steel Co Method for providing metallic strip of uniform thickness and flatness
US3496748A (en) * 1966-01-03 1970-02-24 Davy & United Eng Co Ltd Mill apparatus
US3664166A (en) * 1968-05-16 1972-05-23 Forges De La Loire Comp D Atel Method and device for the continuous rolling of thin strips
US3744288A (en) * 1971-12-22 1973-07-10 Morgan Construction Co Tensiometer
US3961510A (en) * 1975-07-11 1976-06-08 Wean United, Inc. Tension device for a rolling mill and the like
WO1999012249A1 (en) * 1997-08-29 1999-03-11 General Electric Company Systems, methods and apparatus for winding conductive wires for a stator of an electric motor
US20190001382A1 (en) * 2017-06-30 2019-01-03 Dura Operating, Llc Variable thickness roll-formed blank and roll-forming system and method

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FR2403839A1 (fr) * 1977-09-26 1979-04-20 Secim Procede de regulation de l'epaisseur d'un produit plat en cours de laminage et installation correspondante
DE4042705C2 (de) * 1989-10-05 2001-02-15 Masch Und Werkzeugbau Gmbh Schlingenheber als Stellglied zur Regelung des Bandzuges
DE4321230A1 (de) * 1993-06-25 1995-03-02 Siemens Ag Vorrichtung zum meßtechnischen Erfassen des Bandzuges bei Bandwalzstraßen
DE102009053859A1 (de) 2009-11-19 2011-05-26 Sms Siemag Aktiengesellschaft Schlingenheber
DE102009053860B4 (de) 2009-11-19 2021-08-05 Sms Group Gmbh Schlingenheber
DE102009053858A1 (de) 2009-11-19 2011-05-26 Sms Siemag Aktiengesellschaft Schlingenheber
DE102010061840B4 (de) 2010-06-14 2020-01-16 Sms Group Gmbh Kolben-Zylindereinheit als schaltbarer Stufen-Zylinder

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US2182659A (en) * 1938-05-25 1939-12-05 Westinghouse Electric & Mfg Co Force regulating system
US2215329A (en) * 1938-07-09 1940-09-17 Westinghouse Electric & Mfg Co Tensiometer
US2223718A (en) * 1938-09-08 1940-12-03 Westinghouse Electric & Mfg Co Tension control system
US2247301A (en) * 1937-06-09 1941-06-24 Askania Werke Ag Means for controlling pressure fluid
US2268217A (en) * 1937-07-01 1941-12-30 Westinghouse Electric & Mfg Co Tensiometer for tandem mills
US2295284A (en) * 1938-10-13 1942-09-08 Joseph P Mccaffrey Tandem rolling mill
US2443642A (en) * 1944-05-06 1948-06-22 Borg Warner Electrical hydraulic power unit
US2605101A (en) * 1945-10-19 1952-07-29 Westinghouse Electric Corp Tension control system
US2753721A (en) * 1953-10-05 1956-07-10 Redmond Company Inc Direction-sensitive linkage-lengthening arrangement, particularly for use in depressed parking of windshield wipers

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US2247301A (en) * 1937-06-09 1941-06-24 Askania Werke Ag Means for controlling pressure fluid
US2268217A (en) * 1937-07-01 1941-12-30 Westinghouse Electric & Mfg Co Tensiometer for tandem mills
US2182659A (en) * 1938-05-25 1939-12-05 Westinghouse Electric & Mfg Co Force regulating system
US2215329A (en) * 1938-07-09 1940-09-17 Westinghouse Electric & Mfg Co Tensiometer
US2223718A (en) * 1938-09-08 1940-12-03 Westinghouse Electric & Mfg Co Tension control system
US2295284A (en) * 1938-10-13 1942-09-08 Joseph P Mccaffrey Tandem rolling mill
US2443642A (en) * 1944-05-06 1948-06-22 Borg Warner Electrical hydraulic power unit
US2605101A (en) * 1945-10-19 1952-07-29 Westinghouse Electric Corp Tension control system
US2753721A (en) * 1953-10-05 1956-07-10 Redmond Company Inc Direction-sensitive linkage-lengthening arrangement, particularly for use in depressed parking of windshield wipers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350904A (en) * 1965-01-21 1967-11-07 United States Steel Corp Deflector roll repositioning assembly
US3397566A (en) * 1965-10-22 1968-08-20 Inland Steel Co Method for providing metallic strip of uniform thickness and flatness
US3496748A (en) * 1966-01-03 1970-02-24 Davy & United Eng Co Ltd Mill apparatus
US3664166A (en) * 1968-05-16 1972-05-23 Forges De La Loire Comp D Atel Method and device for the continuous rolling of thin strips
US3744288A (en) * 1971-12-22 1973-07-10 Morgan Construction Co Tensiometer
US3961510A (en) * 1975-07-11 1976-06-08 Wean United, Inc. Tension device for a rolling mill and the like
WO1999012249A1 (en) * 1997-08-29 1999-03-11 General Electric Company Systems, methods and apparatus for winding conductive wires for a stator of an electric motor
US6431481B1 (en) 1997-08-29 2002-08-13 General Electric Company Systems, methods and apparatus for winding conductive wires for a stator of an electric motor
US20190001382A1 (en) * 2017-06-30 2019-01-03 Dura Operating, Llc Variable thickness roll-formed blank and roll-forming system and method

Also Published As

Publication number Publication date
NL265299A (de) 1964-06-10
ES267417A1 (es) 1961-09-01
GB989059A (en) 1965-04-14
FR1289868A (fr) 1962-04-06
DE1402710A1 (de) 1969-03-13

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