US3200624A - Apparatus and process for processing strip material - Google Patents

Apparatus and process for processing strip material Download PDF

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Publication number
US3200624A
US3200624A US173863A US17386362A US3200624A US 3200624 A US3200624 A US 3200624A US 173863 A US173863 A US 173863A US 17386362 A US17386362 A US 17386362A US 3200624 A US3200624 A US 3200624A
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United States
Prior art keywords
torque
station
stations
strip
rollers
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Expired - Lifetime
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US173863A
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English (en)
Inventor
Tix Arthur
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Bochumer Verein fuer Gussstahlfabrikation AG
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Bochumer Verein fuer Gussstahlfabrikation AG
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    • 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
    • B21B37/52—Tension control; Compression control by drive motor control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
    • B21B35/04—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills each stand having its own motor or motors

Definitions

  • This invention relates to processes and apparatus for treating strip material and more particularly to processes and apparatus for rolling strips to predetermined sizes.
  • the procedure can be considered as a single pass or operation with forward and backward slips corresponding to neutral points in turn corresponding to the stations.
  • deviations in the desired system of forward and backward slips and associated roller speeds may be corrected, for example, by loop lifters which influence the speed of the rollers of one of the stations.
  • This change in speed propagates like a disturbance wave to one or the other end of the mill and further loop lifters of the mill compensate for the disturbance.
  • a state of equilibrium is thus established based on the velocity pattern of the op eration taking into account the forward and backward slips.
  • the invention relates particularly to continuous roughing trains for hot strip mills, but is as well applicable in the continuous trains of section mills wherein loop lifters or the like cannot be used or can be used only under special conditions.
  • a change of the driving moment which is measured at one station, on elastic driving elements and which occurs after the strip has entered the respectively sequential station, is used for the purpose of influencing the speed of the first station in such a manner that the change in torque is counteracted.
  • the preferred method is to influence the speed of the station upstream relative to the direction of rolling, so that a disturbance at a neutral point is balanced toward the upstream end of the mill.
  • a feature of the process according to the invention consists of the use of elastic or resilient driving elements for measuring torque deflections. Further, it is important to have comparatively long elastic paths to make it possible to determine the torque changes very accurately.
  • the invention is not limited to the abovedescribed spring combination, it being possible to use only the torsion bar springs or only the elastic couplings or clutches in addition to the two elements being coupled together in series.
  • the torque may be measured by optical, mechanical or electrical measurement of the corresponding spring elongations.
  • the measuring of the related force by means of electric pressure meters which are arranged between the spider arms and the coil springs of the clutches.
  • amplifiers may, according to the invention, be built into the coupling clutch.
  • the invention provides further for varying the sensitivity range of the measuring instruments. For example, if a narrow strip instead of wide strip is rolled on a given train, the torque level is located at the lower limit of the range of the motor power.
  • FIGURE 1 diagrammatically represents a mill including a sequence of rolling stations in accordance with the invention
  • FIGURE 2 diagrammatically illustrates the progression of a strip through a sequence of rollers
  • FIGURE 3 diagrammatically illustrates a particular control contemplated in accordance with the invention
  • FIGURE 4 is a sectional view taken along line IV IV of FIG. 3.
  • FIGURE 1 of the drawings is diagrammatically represented an ingot or strip 10 adapted to be processed by a linear sequence of the rolling stations 12, I4, 16, i8, 20 and 22.
  • the operation of said rolling stations is effected in known manner to roll down the ingot to a strip of predetermined size.
  • torque indicating means or meters 36, 38, 4t 42, 44 and 45 are associated with the coupling arranged between the various motors 3 and the associated rolling stations.
  • torque meter 38 is coupled to motor 24 by a line 46; torque meter 40 is coupled to motor 26 via a line 48; torque meter 42 is coupled via line 59 to motor 28; torque meter 44 is coupled to motor 36 via line 52 and torque meter 45 is coupled to motor 32 by line 54.
  • lines 46 to 54- inclusive feed current to motors 2-4 to 32 respectively to control either field intensity or armature current in a well known manner.
  • the torque meters 36-45 may be conventional meters adapted, for example, for converting electrical signals into mechanical movements or into control signals in accordance with conventional techniques. Also, in accordance with conventional techniques, said meters may have a controllable sensitivity.
  • a sensitivity control member 56 which may, for example, take the form of a computer of conventional type.
  • This sensitivity control has an input electrically coupled via line 57 to the torque meter 36, to be controlled thereby, and may further be electrically connected to the aforesaid torque meters by means of connections 58, 60, 62, 64, 66 and 68.
  • Sensitivity control 56 receives signals from torque meter 36 indicative of the torque at rolling station 12 and converts these signals to signals proportional to the received signal which are transmitted to torque meters 38 to 45 for adjusting their sensitivity. The purpose of the control 56 will'become hereinafter apparent.
  • the ingot or strip passes progressively in an upstream to downstream direction through the rollers '79 and 72 constituting the first rolling station and thence between the rollers 74 and '76 constituting the next sequential downstream rolling station.
  • the strip 10 has not yet become engaged between the rollers 78 and 8t) of the next sequential downstream station.
  • FIGURE 3 illustrates by way of example, and in diagrammatic form, some of the details of, for example, rolling station 14 and the associated motor 26, the torque meter 38 being evident in this figure along with the ingot or strip 10 and the associated rollers 74 and 75.
  • the apparatus of FIG. 3 comprises a shaft 88 connected to the drive transmission 86 for driving the same and collector rings 99 which are electrically conductive elements, the purpose of which will become hereinafter apparent.
  • a coupling member 92 Connected to shaft 88 is a coupling member 92 which is effective to connect shaft 88 to torsion bar 94, connected by means of rigidly connected flanges 96 and 98 to the shaft of motor 26. It is to be understood that the other stations of the apparatus are similarly composed.
  • FIG. 4 is shown a sectional view through line IV-IV of'FIG. 3, and more particularly, there is disposed in this figure some of the constructional details of the coupling member 92.
  • Couplingmember 92 comprises rotatively displaceable elements or parts 1% and 102, concentricallydisposed on a common axis of rotation. These parts are provided respectively with interdigitated radially extending sections 1M and 106, between which are serially disposed co1l springs 188 and pressure responsive elements 110.
  • Pressure responsive elements 110 are adapted to proof the train or sequence of stations.
  • Vida or generate electrical signals in accordance with the forces or pressuresexerted thereagainst. These elements are connected to amplifiers 112 mounted on one of the rotatably displaceable elements such as, for example, the elix 102.
  • Amplifier 112 is provided with power supplied through selected of the rings W, whereas other of said collector rings are adapted to remove amplified electrical signals which have been processed through the associated amplifier 112.
  • the torque meter 36 of said station unergoes a wide deflection, but then fades away to a stationary state. 1 This is a measure of the distance load
  • the torque meter 36 adjusts the sensitivity range of all of the torque meters of the train to the level of the distance load, inclusive of its own sensitivity range as well.
  • a delaying control element (not shown) provides that, only after said impact has faded awa, can the torque meter exert an influence on the speed of rotation of the rollers of the first station. For example, if the predetermined speed of thesecond station in the pattern of the forward and backward slips of the neutral points of the two stations remainscorrect, the torque meter automatically assumes its zero setting after said iniial impact. But if'the rollers of the second station run slightly to quickly, the strip between the two stations exerts a draft force (tension) or pull on the first station with the result that a disturbance towards the negative is imparted relative to the zero setting of meter 38; The disturbance is electrically communicated to the speed con trol instrument (not shown) of the motor. 24 and has the 1 effect of increasing the speed of the rollers 70 and 72 somewhat too slowly, the torque meter 38 adjusts the resulting disturbance positively by a reduction in speed of the rollers of the first station.
  • the torque meter'of the second station reacts accordingly to a draft or thrust force of the stripsection between the second and third stations.
  • the torque meter of the'second station is adjusted after the strip has entered the second station and before it has entered the third station and after the first station has been adjusted to azero point which it tends to maintain, because it is. arranged in a regulating circuit of its driving motor.
  • the torque meter of thesecond station increases or reduces the speed of the rollers of the second station. This, in turn, causes the torque meter of the first station to react since the change in speed of the second station is a new positive or negative disturbance for the torque meter of the first station.
  • a method comprising measuring the torque at said first station to detect the influence of said length of material on the torque developed at said first station and establishing a detection level at the other of said stations in accordance with said influence; and measuring the influence of said length of material on the torque developed at one of the stations and varying the speed in another station in accordance with said influence.
  • a method as claimed in claim 1 comprising representing said influence as a magnitude of electrical energy amplifying said electrical energy and controlling the speed at the other said station with said amplified electrical energy.
  • a method is claimed in claim 1, wherein said rolling force is applied through a torsion bar, the method comprising detecting said influence at said torsion bar.
  • drive means which transmits power in the form of torque and speed for applying rolling forces to a continuous length of material passing from a first of said stations to the other of said stations, a method comprising measuring the torque at said first station to detect the influence of said length of material on the torque developed at said first station, and establishing a detection level at the other of said stations in accordance with said influence.
  • Rolling apparatus comprising a sequence of rolling stations including rollers aligned to process a continuous length of material, motors adapted for being coupled to the rollers of said stations to drive said rollers and thereby roll said strip and drive the same through said sequence of stations in an upstream to downstream direction, a drive transmission coupled to the rollers in each station, a shaft coupled to each said drive transmission, a coupling member on each said shaft, each coupling member including rotatively displaceable sections and coil springs and pressure sensitive elements serially arranged between said seconds, said elements being adapted to provide an electrical signal according to pressures exerted thereon, a torsion bar connected between each coupling member and the corresponding motor, amplifier means on and rotatable with each coupling member and connected to the associated element to amplify the signal thereof, collecting rings on each shaft for supplying power to the corresponding amplifier means and for removing the amplified signal therefrom, torque meters coupled via said rings to said amplifier means, the torque meter associated with each station being connected to one of the motors to control the same
  • Rolling apparatus comprising a sequence of rolling stations including rollers aligned to process a continuous strip, motors adapted for being coupled to the rollers of said stations to drive said rollers and thereby roll said strip and drive the same through said sequence of stations in an upstream to downtream direction, a drive transmission coupled to the rollers in each station, a shaft coupled to each said drive transmission, a coupling member on each said shaft and connected to the corresponding motor, means of each coupling member to provide a signal varying according to torque changes therein, and torque meters coupled to said means, the torque meter associated with each station being connected to one of the motors to control the same.
  • Rolling apparatus comprising a sequence of rolling stations including rollers aligned to process a continuous strip, motors adapted for being coupled to the rollers of said stations to drive said rollers and thereby roll said strip and drive the same through said sequence of stations in an upstream to downstream direction, coupling members connecting said rollers to the corresponding motors, and torque indicating means coupled to the coupling members to measure torque changes therein, the torque indicating means associated with each station being connected to one of the motors to control the same.
  • each said coupling member defines an axis of rotation and comprises two rotatively displaceable members including interdigitated radially extending parts, and a spring and pressure responsive member serially disposed between said parts.
  • Apparatus as claimed in claim 12 comprising collecting rings connected to the amplifiers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
US173863A 1962-02-14 Apparatus and process for processing strip material Expired - Lifetime US3200624A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353384A (en) * 1963-11-04 1967-11-21 Asea Ab Rolling mill
WO1980002238A1 (en) * 1979-04-20 1980-10-30 Schloemann Siemag Ag Adjustment of the tension in a continuous rolling plant
US4723450A (en) * 1986-11-04 1988-02-09 General Electric Company Method and apparatus for measuring torque
US4979397A (en) * 1989-06-13 1990-12-25 The United States Of America As Represented By The United States Department Of Energy In-line rotating torque sensor with on-board amplifier
DE19624717A1 (de) * 1995-07-31 1997-02-06 Gfm Gmbh Verfahren zum Regeln des Walzgutdurchlaufes durch eine kontinuierliche Walzstraße
WO1997027012A1 (en) * 1996-01-23 1997-07-31 Siemens Aktiengesellschaft System and method for rolling slabs
US5806357A (en) * 1996-01-23 1998-09-15 Siemens Aktiengesellschaft System and method for rolling tapered slabs
US20110166786A1 (en) * 2010-01-07 2011-07-07 Ceske Vysoke Uceni Technicke V Praze System for correction of inaccuracies of inertial navigation systems

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2007505A (en) * 1931-04-11 1935-07-09 Jr Marshall A Smith Transmission dynamometer
US2134514A (en) * 1935-04-04 1938-10-25 Gen Electric Control system
US2332859A (en) * 1938-08-30 1943-10-26 Kreissig Ernst Shaft coupling
US2544467A (en) * 1947-01-31 1951-03-06 Aluminum Co Of America Tension control system
US3110203A (en) * 1957-08-13 1963-11-12 Westinghouse Electric Corp Control apparatus for a rolling mill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2007505A (en) * 1931-04-11 1935-07-09 Jr Marshall A Smith Transmission dynamometer
US2134514A (en) * 1935-04-04 1938-10-25 Gen Electric Control system
US2332859A (en) * 1938-08-30 1943-10-26 Kreissig Ernst Shaft coupling
US2544467A (en) * 1947-01-31 1951-03-06 Aluminum Co Of America Tension control system
US3110203A (en) * 1957-08-13 1963-11-12 Westinghouse Electric Corp Control apparatus for a rolling mill

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353384A (en) * 1963-11-04 1967-11-21 Asea Ab Rolling mill
WO1980002238A1 (en) * 1979-04-20 1980-10-30 Schloemann Siemag Ag Adjustment of the tension in a continuous rolling plant
US4723450A (en) * 1986-11-04 1988-02-09 General Electric Company Method and apparatus for measuring torque
US4979397A (en) * 1989-06-13 1990-12-25 The United States Of America As Represented By The United States Department Of Energy In-line rotating torque sensor with on-board amplifier
DE19624717A1 (de) * 1995-07-31 1997-02-06 Gfm Gmbh Verfahren zum Regeln des Walzgutdurchlaufes durch eine kontinuierliche Walzstraße
DE19624717C2 (de) * 1995-07-31 2002-08-29 Gfm Gmbh Steyr Verfahren zum Regeln des Walzgutdurchlaufes durch eine kontinuierliche Walzstraße
DE19624717C5 (de) * 1995-07-31 2006-01-26 Gfm Gmbh Verfahren zum Regeln des Walzgutdurchlaufes durch eine kontinuierliche Walzstraße
WO1997027012A1 (en) * 1996-01-23 1997-07-31 Siemens Aktiengesellschaft System and method for rolling slabs
US5806357A (en) * 1996-01-23 1998-09-15 Siemens Aktiengesellschaft System and method for rolling tapered slabs
US20110166786A1 (en) * 2010-01-07 2011-07-07 Ceske Vysoke Uceni Technicke V Praze System for correction of inaccuracies of inertial navigation systems

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