EP0399296B1 - Automatisches Einrichten eines Universalwalzgerüstes nach dessen Umbau auf neue Profilformate - Google Patents

Automatisches Einrichten eines Universalwalzgerüstes nach dessen Umbau auf neue Profilformate Download PDF

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Publication number
EP0399296B1
EP0399296B1 EP90108783A EP90108783A EP0399296B1 EP 0399296 B1 EP0399296 B1 EP 0399296B1 EP 90108783 A EP90108783 A EP 90108783A EP 90108783 A EP90108783 A EP 90108783A EP 0399296 B1 EP0399296 B1 EP 0399296B1
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EP
European Patent Office
Prior art keywords
roll
rolls
vertical
horizontal
stand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90108783A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0399296A2 (de
EP0399296A3 (de
Inventor
Hans-Jürgen Reismann
Burkhardt Porombka
Walter Schmalz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE3916927A external-priority patent/DE3916927A1/de
Priority claimed from DE3916925A external-priority patent/DE3916925A1/de
Application filed by SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT90108783T priority Critical patent/ATE92798T1/de
Publication of EP0399296A2 publication Critical patent/EP0399296A2/de
Publication of EP0399296A3 publication Critical patent/EP0399296A3/de
Application granted granted Critical
Publication of EP0399296B1 publication Critical patent/EP0399296B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • B21B37/64—Mill spring or roll spring compensation systems, e.g. control of prestressed mill stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/10—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators
    • B21B38/105—Calibrating or presetting roll-gap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/08—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/10—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
    • B21B2013/106—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane for sections, e.g. beams, rails
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/36—Spacers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting

Definitions

  • the invention relates to a method for automatically setting up horizontal and vertical rolls in a universal stand, in particular after converting the stand to new profile formats of the rolling mill with the aid of adjusters and by means of position measuring devices for the roll adjustments switched to computer units, with particular attention to the spring characteristic constant.
  • the invention also relates to a device for carrying out the method according to the invention.
  • a working method of the type mentioned at the outset for automatically setting up the rolls of a universal stand is described, for example, in DE-PS 35 01 622.
  • the lower roller is moved to the middle of the roll and the upper roller is moved onto the lower roller with rolling pressure.
  • the respective positions of the rolls are determined by moving the rolls together, the position of the lower roll in the middle of the roll being used as the “initial value”.
  • the further work steps are based on the lower roll thus determined, ie the upper roll and the vertical rolls are aligned after the lower roll in such a way that the axial fastening of the upper roll is released and the vertical rolls are moved in the direction of the roll center, whereby they If necessary, move it axially against a flank of the top roller until both vertical rollers rest on the side flanks of the bottom roller.
  • the top roller is then fixed in this position. All rollers are driven to roller pressure and the system in the connected computer is set to zero.
  • This method of setting up the rollers does not take into account that the springing of the stand in the radial direction of the horizontal rollers or in the radial direction of the vertical rollers can be very different. For this reason, the known setting up of the rolls is fraught with considerable inaccuracies, which are disadvantageous at the latest when the stand with the first profile rolling stock goes into operation and is driven to the rolling pressure.
  • an adjusting device for a universal stand is known with the co-ordinating associated electromechanical coarse adjustments and hydraulic fine adjustments.
  • a calibration process for the scaffolding is carried out at intervals with the adjusting device. For this purpose, all rolls are electromechanically moved to each other to zero calibers and then various mean hydraulic pressures to be expected according to the schedule are set. All stored hydraulic pressures at the different position values of the fine adjustments result in the scaffold suspension characteristic for the vertical or horizontal force curve.
  • the position and pressure values set under calibration conditions are set to zero values by the control system. With these measures, the caliber setting, in particular of the finishing stand, can be carried out satisfactorily in a universal carrier line without a test run and test bar.
  • the object of the present invention is to automatically adjust the horizontal and vertical rolls of the universal stand, in particular after the stand has been converted to new profile formats, to an installation geometry based on the center of the roll stand, in particular in connection with an automatic determination of the spring characteristics of the stand , namely with regard to the stand expansion, the elastic behavior of the rollers and roller positions used and the like.
  • the rollers After the rollers have been automatically set up, the rolling forces should be able to act evenly on the profile rolling stock, even if the rolling stock profile should be extremely asymmetrical.
  • the axial installation geometry of the vertical rolls in the stand serves as a fixed reference variable, the horizontal rolls being shifted radially and axially into those roll positions measured by actual position sensors, from which the geometrical roll gap center and the geometrical roll center in the stand are determined.
  • This procedure for the automatic setup of horizontal and vertical rolls in a universal stand shows the following advantages: Based on the roll stand-related and vertically defined installation geometry of the vertical rolls, the installation of the horizontal rolls is aligned exclusively with the geometry of the roll stand, so that the web center of a new profile , ie the roll gap center, can be placed exactly in the middle of the vertical roll bales.
  • the horizontal rollers can assume an axial central position, the corresponds to the axial center of the scaffold, the flange thickness of a new profile can be precisely adjusted both on the operating side of the scaffold and on its drive side. As a result, this leads to rolled profiles without any noteworthy eccentricity of the webs and great accuracy of the flange thicknesses and the web thicknesses. It should be emphasized that test runs with one or more sample profiles can be dispensed with, since the roll caliber is automatically set to the optimum caliber for the respective profile bar from the beginning, taking into account all rolling conditions.
  • the radial spring characteristic for both horizontal rollers is common, the radial spring characteristic is separate for each vertical roller, and the axial spring characteristic of one of the horizontal rollers is determined separately in each of the two axial directions, in which the rollers are moved against each other electromechanically until the moment they touch down and then the roll bale pressure is hydraulically increased to at least two pressure points and relieved of these pressure points, it is advantageously possible to take into account the axial rolling force components, which differ from profile to profile in a profile rolling mill, and which also occur unevenly distributed on the upper or lower horizontal roller.
  • the advantage of the inventive measures becomes even clearer with the asymmetrical profiles, since there the vertical center of the roll barrel does not have to be identical to the shape of the caliber.
  • the rollers are automatically set up in the universal stand in accordance with the following sequence of work steps:
  • the vertical rollers are immovable in the vertical direction of the scaffold and built into the scaffold at the same level in the horizontal plane.
  • the lower horizontal roller is installed in the vertical center position of the stand.
  • the lower horizontal roll is then alternately approached by the vertical rolls at a certain pressure and the center of the roll is determined from the measured position values.
  • the horizontal rolls are opened and a certain roll gap is set above the horizontal center position of the vertical rolls.
  • the vertical rollers are moved against the lower horizontal rollers and brought to a certain pressure.
  • the upper horizontal roller is then mutually displaced against the vertical rollers, the positions reached are measured and the distance between the lower horizontal roller and the center of the nip is calculated. Finally, all actual position transmitters for the horizontal rolls and the actual position transmitters for the vertical rolls are set to zero. This is done taking into account the previously set roll gap as well as the profiling of the roll bales and the measured values found; it is ensured that the top and bottom rolls have the same profiles of the roll barrel.
  • the sequence of these work steps can also be started with the upper horizontal roller.
  • the roll gap of the opened horizontal rolls can also be below the horizontal center position of the vertical rolls. This advantageous sequence of work steps enables the exact location of the stand-related geometric roll center and roll gap center to be found fully automatically and without any test run and without optical aids.
  • the setting up of the rollers in the stand can be set or adjusted from a control station.
  • the speed of the electromechanical positioning of the rollers against one another is reduced with increasing distance reduction and becomes zero at the moment of touchdown.
  • This enables an even faster and more reliable determination of the spring characteristic when changing from a rolled profile to a new profile, since the rollers can be programmed to be moved against one another up to the so-called "roll kissing".
  • the moment of "roll kissing" can be tracked, for example, with the aid of pressure sensors registering an increase in pressure, by means of which the positioning movement of the rollers is stopped.
  • the electromechanical positioning movement of the horizontal rolls is synchronized with each other and with the vertical rolls open until the moment of touchdown and then one of the horizontal rolls is hydraulically acted upon by the roll pressure. In this way, damage to the horizontal rollers is avoided, even if they are relatively quick up to the moment of touchdown be driven.
  • the roller ball pressure is only raised hydraulically to several pressure points.
  • the vertical rollers are moved electromechanically against the flanks of the horizontal rollers when they are driven against one another without pressure and with an upper or lower horizontal roller relieved in the sense of an axial movement, and that each individual vertical roller is then pressure-synchronized with the roller ball pressure is hydraulically applied.
  • the upper horizontal roller can be pressed axially flush with the lower horizontal roller and vice versa.
  • the method according to the invention allows the pristine spring characteristic constant to be recorded for each vertical roller, since the support forces cancel each other out over the horizontal rollers and only the springing values of the stand are measured on the drive side and on the operator side.
  • a vertical roller is driven electromechanically from one or the other side against the associated flank of the lower or upper horizontal roller up to the touchdown moment, the horizontal rollers being driven against one another without pressure and that subsequently each Vertical roller with the roller ball pressure is hydraulically applied.
  • Both horizontal rollers can be fixed or only one of the two; both horizontal rollers can also be axially displaceable. If necessary, the movement of the horizontal rollers can also be measured. As a result, the axial spring characteristic constant for the lower and upper horizontal roller is determined separately for both the operator side and the drive side.
  • a filler is inserted between the flanks of the horizontal rolls and the roll bale of each vertical roll before the vertical roll is acted upon by the hydraulic roll bale pressure.
  • the invention also relates to a universal stand, which is characterized in that the upper or lower horizontal roller with an electromechanical long-stroke adjustment acting in the radial direction and is connected to a hydraulic short-stroke adjustment, and has a hydraulic short-stroke adjustment acting in the axial direction, that the lower or upper horizontal roller is connected to an electromechanical long-stroke adjustment acting in the radial direction and is releasable and adjustable in the axial direction, that the vertical rollers with one in the radial Direction acting electromechanical long stroke adjustment and are connected to a hydraulic short stroke adjustment and are arranged in the vertical direction of the stand immovably and at the same height, and that the upper or lower horizontal roller has a hydraulic adjusting device for axial movement, which can be relieved that the vertical rollers in the middle of the nip ( MS) of the stand are arranged in such a way that the horizontal rolls have axial actual position sensors which are connected to a computer for determining the vertical rolling center (MW) of the stand
  • the structural measures can alternatively be transferred to the respective other horizontal roller.
  • the combination of these design measures enables the automatic setting up of the rolls in the geometric roll center and roll gap center of the stand.
  • the electromechanical adjustments With the electromechanical adjustments, the so-called “roll kissing” can be carried out quickly and very precisely; With the hydraulic short stroke adjustment, the travel ranges and pressure points for determining the spring characteristic are traversed.
  • the design of the electromechanical Long stroke adjustment or the hydraulic short stroke adjustment or also the hydraulic short stroke adjustment can take place according to the state of the art.
  • both the upper horizontal roller 1 and the lower horizontal roller 2 are each assigned an electromechanical long-stroke adjustment 5 or 6, which are symbolically indicated by double arrows and correspond in their construction to the state of the art. This also applies to the electromechanical long stroke settings 7 and 8 for the vertical rollers 3 and 4.
  • the respective positions of the horizontal rollers 1 and 2 are monitored by displacement sensors 9, 10, which are indicated by scales. In the same way, the position of the vertical rollers 3 and 4 is monitored by displacement sensors 11 and 12.
  • the upper horizontal roller 1 has two hydraulic short stroke positions 13 and 14 and the vertical rollers are also assigned two hydraulic short stroke positions 15 and 16. Furthermore, a hydraulic short stroke adjustment 22 acting in the axial direction is assigned to the upper horizontal roller.
  • the position of the hydraulic short-stroke adjustments of the horizontal rollers is monitored in the radial direction with the aid of the displacement sensors 17. This monitoring is carried out in the case of the vertical rollers with the aid of the displacement sensor 18.
  • the displacement sensor 21 is used to monitor the hydraulic short stroke adjustment 22 in the axial direction of the upper horizontal roller.
  • the rolling force exerted by the horizontal rolls 1, 2 on a rolling profile is measured by rolling force transmitters or pressure load cells 19.
  • the rolling forces exerted by the vertical rollers 3 and 4 are conveyed via the pressure sensors 20.
  • all actual position sensors 17, 18, 21 and the pressure transducers 19 for the horizontal rolling force and the pressure transducer 20 for the rolling forces of the vertical rollers can be stored and called up in an electronic computing unit 26.
  • the upper and lower horizontal rolls 1, 2 are installed in the vertical center position MW of the roll stand.
  • the vertical rollers are immovable in the vertical direction of the stand and installed horizontally at the same height in the stand.
  • the upper horizontal roller can be adjusted in the axial direction using the hydraulic short stroke adjustment 22.
  • the lower horizontal roller 2 does not have its own adjustment drive in the axial direction.
  • the installed lower horizontal roller with the vertical roller 4 of the drive side 23 is pushed against a reference edge 27 of the roll stand.
  • a defined hydraulic measuring pressure is reached, the position reached is measured in the direction of the operating side 24 of the scaffold on the axial travel detection 28 and a measuring point P1 is stored (FIG. 2). Then the vertical roller 4 of the drive side 23 is moved back again.
  • the mean position value MW of the lower horizontal roller is determined by calculation, while the lower horizontal roller is held at measuring point P2.
  • the next step is to determine the rolling gap center.
  • the vertical rollers 3 and 4 on the drive side 23 and on the operating side 24 must be installed horizontally and at the same height in the roll stand.
  • the center of the vertical rolls is the reference plane for the center of the roll gap.
  • the vertical rolls 3 and 4 are raised.
  • the two horizontal rollers 1 and 2 are moved together until roll kissing and with the hydraulic short stroke adjustment 13, 14 to a defined roller ball pressure of bswp. Brought 100 KN.
  • the position values of the position actual value transmitters are recorded at the moment of the roll kissing and when the roller ball pressure is applied and are stored in the computer unit 26.
  • a roll gap A of approximately 10 mm is opened as shown in FIG. 3. Both horizontal rolls are set above the roll gap center MS determined later. With the help of the hydraulic short stroke settings 15, 16, both vertical rollers 3, 4 are moved against the lower horizontal roller 2 and the roller ball pressure of each individual vertical roller is increased synchronously to, for example, 1000 KN.
  • the upper horizontal roller 1 is moved axially with the aid of the hydraulic short stroke adjustment 22 from the central position MW to the vertical roller 4 on the drive side 23 and then up to the vertical roller 3 on the operating side 24.
  • the paths X1 and X2 are detected with the aid of the position actual value transmitter 21 for the upper horizontal roller 1.
  • the lower horizontal roll After determining the roll center MW or the roll gap center MS of the stand, the lower horizontal roll is moved to the calculated roll gap center.
  • the actual position sensors for the horizontal rolls and the actual position sensors for the vertical rolls are then set to zero.
  • An electromechanical long-stroke adjustment 5, 6 with a positioning accuracy of +/- 0.04 mm and a hydraulic short-stroke adjustment 13, 14 for the upper horizontal roller are used to position the upper and lower horizontal rollers on the roller gap "zero" for the web thickness with an accuracy of +/- 0.01 mm.
  • the roll gap can be set to an accuracy of +/- 0.01 mm.
  • each vertical roller 3, 4 on the required roll gap for the flange thickness on the drive side 23 or operating side 24 is moved simultaneously onto the flanks of the horizontal rollers.
  • an electromechanical long stroke adjustment 7, 8 with a positioning accuracy of +/- 0.04 mm and a hydraulic short stroke adjustment 15, 16 with a Positioning accuracy of +/- 0.01 mm used.
  • each roll gap can be adjusted to +/- 0.01 mm can be set precisely.
  • the spring characteristic constant of the universal stand has to be redetermined in order to carry out a quick and reproducible caliber setting of the universal stand without a test run and without a test rod.
  • the determination of the spring characteristic constant is characterized by the following steps:
  • the spring characteristic constant for the horizontal rolls is determined jointly (FIG. 5).
  • the electromechanical long stroke adjustment 5 and the hydraulic short stroke adjustments 13, 14 of the upper horizontal roller 1 and the electromechanical long stroke adjustment 6 of the lower horizontal roller 2 are actuated.
  • the vertical rollers are in the open position.
  • the two drives for the electromechanical long-stroke adjustments are electrically synchronized to ensure the central positioning movement of the upper horizontal roller and the lower horizontal roller.
  • the hydraulic short stroke settings 13, 14 are positioned in the starting position of the hydraulic cylinder and held there during the positioning movement.
  • the upper horizontal roller and the lower horizontal roller are moved together electromechanically.
  • the pressure transducers 19 arranged on the lower horizontal roller register an increase in pressure, the pitch speed being reduced with increasing roll gap reduction in accordance with the speed profile in FIG. 6.
  • the setting speed for both long-stroke adjustments goes to zero, which is what is known as "roll kissing".
  • the contact force 1000 KN corresponds to the initial value A1 in the spring characteristic.
  • the travel of the piston is measured and saved. At the same time, this initial value A1 is set to zero.
  • F 3000 KN
  • the travel position of the piston is measured and stored.
  • the suspension travel ( ⁇ S) results from the difference P2 - P1 (mm); the differential pressure ( ⁇ F) results from the difference 3000 KN - 1000 KN.
  • the mean spring characteristic constant is then ⁇ F / ⁇ S (KN / mm).
  • the roll flattening, which in roll kissing is a function of the roll placement force, the roll diameter, the roll barrel length and the roll material, is not measured individually, but is only calculated, saved and taken into account when determining the spring characteristic constant.
  • the electromechanical long stroke settings 7, 8 and the hydraulic short stroke settings 15, 16 are actuated.
  • the horizontal rollers are moved together without pressure.
  • the upper horizontal roller 1 is hydraulically relieved on both sides of the short stroke adjustments 22 for the axial movement.
  • the hydraulic short stroke settings 15, 16 of the vertical rollers are positioned in the starting position of the hydraulic cylinder and held there during the positioning movement.
  • both vertical rollers takes place electromechanically until it is placed on the upper and / or lower horizontal roller, not synchronized and at the same time for the drive side 23 and for the operating side 24 of the universal stand.
  • the speed curve 6 the setting speed is reduced with increasing roll gap reduction and becomes zero at the moment of being placed on the upper and / or lower horizontal roll, ie at the moment of roll kissing.
  • the upper horizontal roller is pressed axially with the lower horizontal roller with the same edge and the roller ball pressure of each individual vertical roller is increased in pressure-synchronized manner to, for example, 1000 KN. 7 is determined separately for the drive side and the operator side.
  • This method allows the undistorted spring characteristic constants to be recorded separately for each vertical roller, since the support forces cancel each other out over the horizontal rollers and only the spring deflection values are measured on the drive side and on the operator side.
  • the travel of the piston is measured and stored for each hydraulic short stroke setting 15, 16.
  • the initial values A1 are set to zero.
  • the further determination of the spring characteristic constant for each vertical roller takes place in accordance with the work steps which are carried out for the horizontal rollers 1, 2 and were described further above in relation to FIG. 5 and the spring-up characteristic curve of the horizontal rollers shown.
  • the different angles of the horizontal and vertical rolls must be compensated, e.g. for horizontal roll sets for the rolling of profiles whose flange width is greater than 500 mm.
  • filling pieces for example spacers, must be used when the vertical rolls are pressed against the horizontal rolls. These spacers are installed when the roll is changed and after the vertical rolls have been calibrated from the universal finishing stand taken. The flattening of the spacers is included in the calculations when determining the spring characteristic constant together with the flattening of the vertical rollers.
  • the axial spring characteristic constant for the lower horizontal roller is determined separately in both directions of the vertical rollers (FIGS. 8 and 9).
  • the lower horizontal roller 2 has a symbolically represented travel position encoder 25 for the axial displacement of this roller, arranged on the operating side 24 of the roll stand.
  • the electromechanical long-stroke adjustments 7, 8 and the hydraulic short-stroke adjustments 15, 16 of the two vertical rollers 3, 4 are used.
  • the upper horizontal roller is hydraulically relieved on both sides of the axially acting short stroke adjustments 22.
  • the lower horizontal roll 2 cannot be held in the preset rolling center during rolling and deviates in both directions via the differential pressure of the two vertical rolling forces during rolling.
  • spacers must be used with the universal finishing stand before pressing. The flattening of the spacers is included in the calculations when determining the spring characteristic constant.
  • the hydraulic short stroke adjustments of the vertical rollers are positioned in the starting position of their respective hydraulic cylinders and held there during the positioning movement.
  • the vertical roller 4 of the drive side 23 is moved by the electromechanical long-stroke adjustment 8 against the lower horizontal roller.
  • the upper horizontal roller is only dragged along.
  • the setting speed up to the touchdown moment is reduced in accordance with the reduction of the roll gap, i.e. 6, the setting speed is reduced to zero until the moment of roll kissing.
  • the moment of placing the vertical roller 4 on the lower horizontal roller 2 is registered by an increase in pressure.
  • This rolling force corresponds to the initial value A1 of the spring characteristic to be determined.
  • the travel value on the encoder 18 at the axial displacement is set to zero at 1000 KN.
  • This rolling force corresponds to the value A2 on the spring characteristic.
  • the travel is measured and saved via the displacement sensor at the axial displacement.
  • This rolling force corresponds to the value B2 on the spring characteristic curve according to FIG. 8.
  • the travel position at the axial displacement is measured and stored.
  • the roller bale pressure is further reduced to 1000 KN.
  • This rolling force corresponds to the value B1 on the spring characteristic curve according to FIG. 8.
  • the travel position at the axial displacement is measured and stored.
  • the average spring characteristic constant between the points P1 and P2 according to FIG. 8 is calculated in accordance with the algorithm that was previously specified when calculating the average spring characteristic constant for the horizontal rolls 1, 2.
  • the determination of the spring characteristic constant for the lower horizontal roller 2 in the direction of the drive side 23 according to FIG. 9 takes place in the same way as the determination of the spring characteristic constant of the lower horizontal roller in the direction of the operating side 24 according to FIG. 8 and is with the vertical roller 3 of the operating side 24 to perform, as was shown schematically in Fig. 9.
  • the calculation of the mean spring characteristic constant between the points P1 and P2 in FIG. 9 also takes place according to the algorithm that was specified for the calculation of the mean spring characteristic constant in FIG. 8 or for the horizontal rolls.
  • an automatic setting up of the rolls of a universal stand is made possible together with an automatic zeroing of the horizontal roll gaps and the vertical roll gaps taking into account the current spring characteristic constant determined.
  • the automatic setup of the rollers for the universal stand can be carried out from a control station.
  • the measures according to the invention can be related not only to the lower horizontal roll, but alternatively also to the upper horizontal roll of the universal roll stand.
EP90108783A 1989-05-24 1990-05-10 Automatisches Einrichten eines Universalwalzgerüstes nach dessen Umbau auf neue Profilformate Expired - Lifetime EP0399296B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90108783T ATE92798T1 (de) 1989-05-24 1990-05-10 Automatisches einrichten eines universalwalzgeruestes nach dessen umbau auf neue profilformate.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3916927 1989-05-24
DE3916925 1989-05-24
DE3916927A DE3916927A1 (de) 1989-05-24 1989-05-24 Verfahren und vorrichtung zum automatischen einrichten der horizontal- und vertikalwalzen in einem universalgeruest
DE3916925A DE3916925A1 (de) 1989-05-24 1989-05-24 Verfahren und vorrichtung zur ermittlung der federkennlinienkonstanten an einem universalgeruest

Publications (3)

Publication Number Publication Date
EP0399296A2 EP0399296A2 (de) 1990-11-28
EP0399296A3 EP0399296A3 (de) 1991-01-09
EP0399296B1 true EP0399296B1 (de) 1993-08-11

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EP90108783A Expired - Lifetime EP0399296B1 (de) 1989-05-24 1990-05-10 Automatisches Einrichten eines Universalwalzgerüstes nach dessen Umbau auf neue Profilformate

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Country Link
US (2) US5052206A (ko)
EP (1) EP0399296B1 (ko)
JP (1) JP2975397B2 (ko)
KR (1) KR970000373B1 (ko)
CA (1) CA2017347A1 (ko)
DE (1) DE59002263D1 (ko)
ES (1) ES2042136T3 (ko)

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DE4035276C1 (ko) * 1990-11-02 1992-05-07 Mannesmann Ag, 4000 Duesseldorf, De
US5666845A (en) * 1996-01-23 1997-09-16 Tippins Incorporated Rolling mill
US5887472A (en) * 1997-06-23 1999-03-30 Abbey Etna Machine Company Tooling changeover for tube mills
US6321583B1 (en) * 1998-04-15 2001-11-27 Nippon Steel Corporation Multifunction rolling mill for H-beam and rolling method of rolling H-beam with multifunction rolling mill
JP3905666B2 (ja) * 1999-04-28 2007-04-18 大阪製鐵株式会社 入口ローラガイド装置
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KR100407440B1 (ko) * 2001-08-27 2003-11-28 오재윤 롤 포밍 금형 조립 자동화 시스템
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CN102310080B (zh) * 2011-05-18 2014-08-13 合肥市百胜科技发展股份有限公司 轧机
JP6441159B2 (ja) * 2015-04-27 2018-12-19 三菱重工業株式会社 圧延加工装置
CN106807739B (zh) * 2017-03-10 2019-05-24 唐山坤锋机械设备有限公司 一种万能轧机的偏心压下机构
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US5052206A (en) 1991-10-01
ES2042136T3 (es) 1993-12-01
CA2017347A1 (en) 1990-11-24
JP2975397B2 (ja) 1999-11-10
KR970000373B1 (ko) 1997-01-09
DE59002263D1 (de) 1993-09-16
JPH035009A (ja) 1991-01-10
EP0399296A2 (de) 1990-11-28
EP0399296A3 (de) 1991-01-09
US5085067A (en) 1992-02-04
KR900017673A (ko) 1990-12-19

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