EP4025359B1 - Unité de laminage transversal et procédé de réglage du passage de rouleau d'une unité de laminage transversal - Google Patents

Unité de laminage transversal et procédé de réglage du passage de rouleau d'une unité de laminage transversal Download PDF

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Publication number
EP4025359B1
EP4025359B1 EP20785907.5A EP20785907A EP4025359B1 EP 4025359 B1 EP4025359 B1 EP 4025359B1 EP 20785907 A EP20785907 A EP 20785907A EP 4025359 B1 EP4025359 B1 EP 4025359B1
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EP
European Patent Office
Prior art keywords
rolling
roll
cross
mandrel
rolls
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EP20785907.5A
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German (de)
English (en)
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EP4025359A1 (fr
Inventor
Martin Sauerland
Susanne Zeller
Krahn MATTHIAS
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SMS Group GmbH
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SMS Group GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/20—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a non-continuous process,(e.g. skew rolling, i.e. planetary cross rolling)
    • 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
    • B21B13/008—Skew rolling stands, e.g. for rolling rounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
    • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
    • 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
    • B21B37/78—Control of tube rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/12—Rolling load or rolling pressure; roll force
    • 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

Definitions

  • the invention relates to a cross-rolling unit and a method for adjusting the rolling caliber of a cross-rolling unit.
  • cross rolling units or adjustment processes are known, for example, from EP 2 116 312 A1 known.
  • the cross rolling unit comprises at least two rolls, each mounted in a rolling mill, a rolling stand in which at least one of the rolling mills is mounted so as to be adjustable in its position via a rolling mill adjustment, an eccentric bush, to change the rolling caliber, in this case the feed.
  • JP53-149858 reveals a corresponding cross-rolling unit.
  • the EN 10 2016 219 723 A1 discloses a corresponding cross-rolling unit with pressure stilts for adjusting the rolling caliber.
  • the invention is based on the basic finding that a good rolling result can be achieved if the rolling caliber can be adjusted during rolling. This allows the rolling caliber to be adapted to changing rolling parameters, which can be obtained, for example, through suitable measurements.
  • the cross-rolling unit comprises at least two rolls and a roll stand in which at least one of the rolls is mounted so that it can be adjusted in position to change the roll caliber. This allows the rolls to be adjusted to a specific roll caliber.
  • roller mills of the two rollers can be mounted so as to be adjustable in their position above a roller mill adjustment in order to change the roller caliber, which enables a more precise adjustment or alignment of the roller caliber.
  • a cross-rolling unit with at least two rolls and with a roll stand in which at least one of the rolls is mounted so as to be adjustable in its position in order to change the roll caliber can be characterized in that a roll positioning device comprises a part bound to the stand and a part bound to the roll frame that can be moved thereto during rolling, which are adjustable relative to one another and that a drive of the roll positioning device is such that is dimensioned to be able to apply rolling forces, wherein the roll positioning device comprises at least one hydraulic cylinder and is variable in its position during rolling, wherein the roll positioning device comprises at least one movable hydraulic cylinder operable with more than 50,000 hPa and the hydraulic cylinder can be controlled with quick-acting valves of the cross-rolling unit.
  • the at least one hydraulic cylinder can be moved at over 30 mm/s.
  • the first part of the roller positioning device is preferably firmly connected to the stand and the second part is connected to the rolling mill.
  • the stand and thus also the first part of the roller positioning device remain stationary in the same place during rolling or can also rotate in a constant path during rolling if necessary.
  • the rolling mill and accordingly also the second part of the roller positioning device connected to it are adjustable relative to the first part or the roller stand, with the stand preferably remaining in its position if necessary also in its rotating path and the rolling mill adjusting accordingly. The adjustment can take place in particular during rolling, with the parts of the roller positioning device also being able to adjust under load.
  • the rolling caliber can thus be adjusted during rolling, for example in order to produce a changing diameter on the workpiece or in order to be able to react accordingly to geometry changes on the workpiece or to rolling parameters that change during rolling, for example when running in or running out.
  • the rolling caliber could be individually adapted to the shape of the rolling piece during rolling.
  • a cross-rolling unit with at least two rolls and with a roll stand in which at least one of the rolls is mounted so as to be adjustable in its position in order to change the roll caliber can be characterized in that a drive of the roll positioning device is dimensioned in such a way as to be able to apply rolling forces.
  • the roll positioning device is dimensioned in such a way that it can apply the rolling forces, its position can also be changed during rolling and thus at least one of the rolls can be positioned differently, which in turn enables the roll caliber to be changed during rolling.
  • a cross-rolling unit with at least two rollers and with a roller stand in which at least one of the rollers is mounted so that it can be adjusted in position to change the rolling caliber can be characterized in that the mandrel position of a mandrel can be adjusted parallel to the workpiece during rolling by means of a mandrel position adjustment device.
  • the rolling caliber can be adjusted or adapted during rolling in accordance with the basic knowledge explained above.
  • the position of the mandrel in relation to the rollers can be changed, thus influencing the influence of the rolling forces on the workpiece or on the mandrel and therefore the rolling caliber.
  • the mandrel can be adjusted at the same speed as the workpiece during rolling, meaning that the workpiece is only pierced to the point where the mandrel did not move at the same speed and direction as the workpiece.
  • the mandrel can also be removed more easily from the workpiece if the workpiece is not completely pierced or after rolling.
  • the advantages mentioned above can be promoted in particular by the adjustability of a mandrel during rolling using a mandrel position adjustment device parallel to the workpiece.
  • the spread angle or similar, and therefore also the roll caliber can also be changed via the mandrel position adjustment device by adjusting the mandrel position adjustment device, for example if it is arranged as a mandrel holder along the roll axis at a distance from the rolls, perpendicular to the roll axis, which, as already indicated above, can also be done by appropriately adjusting or setting the rolls.
  • the former enables the roll caliber to be changed independently of the direction of movement of the roll mill or the part of the roll positioning device attached to the roll mill or independently of the direction of movement of the roll positioning device itself, so that adjustment options for the roll caliber can be provided more cost-effectively here if necessary.
  • the roller positioning device comprises at least one hydraulic cylinder, which enables a sufficiently dynamic and, in particular, with a suitable design, rapid adjustment of the respective roller.
  • a hydraulic cylinder with which high pressures can be used and with which high travel speeds are likely to be possible. This then makes it possible in particular to have the respective hydraulic cylinder bear at least part of the rolling forces or to change the rolling caliber during rolling. Since the corresponding hydraulic cylinder can be operated at more than 50,000 hPa, rolling forces can then be applied by the roller positioning device. Particularly fast adjustment options can be ensured if the hydraulic cylinder can be moved at more than 30 mm/s, preferably at more than 35 mm/s, and can be controlled with quick-acting valves.
  • the lifting height of the hydraulic cylinder is less than 150 mm. Depending on the specific implementation, even lifting heights of less than 100 mm can lead to satisfactory results. If necessary, a two-stage system can be provided in which the rolling caliber is preselected with a coarse roller positioning device, while an adjustment can then be made during rolling using a finer roller positioning device, for example with a low stroke, high adjustment speed and/or high pressures.
  • two or even more roller positioning devices are provided for at least one of the rollers, possibly even for several or all of the rollers. This enables the corresponding rollers to be positioned more precisely, possibly even in terms of their angle. The rolling forces can then also be distributed across several roller positioning devices, so that they can be counteracted in a structurally simpler manner.
  • the cross-rolling unit comprises a multi-variable control system which comprises at least two input variables and at least one output variable, both of which can be determined by the roller positioning device or are transmitted to the roller positioning device.
  • the input variables can be made up of measured variables which are determined, for example, by the roller positioning device or by other measuring systems and transmitted to them. This allows control processes to be carried out based on the measured data so that the cross-rolling unit or an associated control system can intervene in the rolling process accordingly.
  • the measured values determined by the roller positioning device are available to the cross rolling unit in a relatively simple way.
  • the rolling force in particular, but also the position of the rollers or the rolling mills, are suitable measured values.
  • the input variables can be cumulatively or alternatively the measured variables workpiece entry speed, workpiece exit speed, wall thickness, Eccentricity, outside diameter, ovality, rolling force and mandrel holding force are recorded, which are then used cumulatively or alternatively for multi-variable control.
  • a multi-variable control system that includes at least two input variables and at least one output variable is advantageous, as this allows the rolling process to be monitored more precisely and reacted to accordingly. It goes without saying that this advantage can be further enhanced by additional input or output variables. On the other hand, it is also conceivable that only one input variable and/or only one output variable are used if this appears sufficient for the specific application.
  • the workpiece infeed speed describes the speed of the workpiece relative to the rolls before rolling.
  • the required or advantageous rolling caliber can also change.
  • the dimensions of the workpiece can also be decisive for which workpiece infeed speeds are possible, for example.
  • this speed can be a required variable to be regulated if the mandrel is to be adjusted in a certain speed ratio to the workpiece. It goes without saying that, since blocks or hollow blocks can be used as workpieces, which then pass through the cross-rolling unit with or without holes, the infeed speed of the blocks or hollow blocks can serve as a measurement variable.
  • the workpiece run-out speed describes the speed of the workpiece relative to the rollers after rolling, after piercing or when the workpiece is being moved out or run out.
  • the hollow block run-out speed is often higher than the block run-in speed, since rolling often shifts material in the direction of the workpiece's movement. This is particularly true for expansion processes, when However, in punching or other rolling processes, the workpiece exit speed can also be higher than the workpiece entry speed.
  • the difference between the workpiece entry and exit speed can also be used advantageously as a measured value or as a value derived from it, since this value can also provide important information about the rolling process under certain circumstances.
  • the rotational speed of the workpiece can also serve as a measurement variable, since information about the rolling process can also be obtained from this.
  • the position of the workpiece can also be a suitable measurement variable for optimizing the rolling process in a targeted manner. This means that, for example, different control variable values or a different weighting of measurement variables can be provided when determining the control variables at the start or end of rolling.
  • the wall thickness describes the difference between the outside diameter and the inside diameter of the workpiece, especially of a perforated block or a hollow block.
  • the required or measured wall thickness can serve as a measurement value cumulatively or alternatively.
  • Eccentricity describes the deviation of an ellipse from a circular shape. This measurement may be necessary for preventive control in order to be able to determine the eccentricity of the workpiece before rolling and to react accordingly.
  • rolling can be controlled in such a way that, despite the eccentricity of the workpiece, the rolling process or, in particular, other control or output variables are adjusted in such a way that the desired rolling result can be achieved or that the eccentricity can be optimized, for example, by suitable process engineering measures and geometric irregularities can be corrected.
  • Eccentricity can also be a subsequent control criterion to check whether rolling has changed the eccentricity of the workpiece. Eccentricity can be important both on the outside diameter and on the inside diameter.
  • the outside diameter describes the external diameter of the workpiece.
  • the inside diameter of the workpiece in particular a pipe, can also be determined and used as an input variable.
  • the ovality of the workpiece describes the difference between the largest and smallest outside diameter in one plane. This can be helpful in determining whether process-related adjustments to the control variables are necessary in order to achieve the best possible rolling result.
  • the ovality can be used as a subsequent Control can be used, for example, to check tolerances or to check to what extent rolling has influenced the dimensions of the workpiece.
  • the rolling force describes the force that the workpiece experiences during rolling or the force that the rollers apply to the workpiece during rolling.
  • the rolling force can vary depending on the dimensions and properties of the workpiece. However, the rolling force must be applied throughout the entire rolling process to ensure reliable rolling.
  • the mandrel holding force describes the force with which the mandrel acts on the workpiece, particularly during rolling, and corresponds to the force with which the mandrel must be held during rolling.
  • the size of the mandrel holding force can depend in particular on the nature of the workpiece and the workpiece entry speed. This force can also vary accordingly when adjusting the mandrel position or the spreading angle.
  • the output variables preferably comprise control variables which are adjusted, for example, to regulate the rolling caliber, in particular during rolling.
  • the control variables can in particular include a dynamic positioning adjustment of at least one of the rollers, an adjustment of the rolling center by adjusting all the rollers, a dynamic adjustment of the mandrel position and/or an adjustment of the spreading angle.
  • the control variables are used for multi-variable control in that the control variables can be used to react to the input variables or to control the input variables accordingly.
  • the control variables all describe adjustment options for the individual elements of the cross-rolling unit, such as the adjustment of the rollers and the mandrel. These adjustment options, which are determined by the control variables, are used to actively influence the measured variables. For example, a certain rolling force can only be determined by adjusting the position of the upper or lower roller accordingly.
  • the rotational speed of the rollers or the rotary drive force acting on the rollers and similar can also be used cumulatively or alternatively as output variables.
  • the methods for adjusting the rolling caliber of a cross-rolling unit with at least two rolls can be characterized in that at least one of the rolls is adjusted during rolling. It goes without saying that two or all of the rolls of the cross-rolling units can also be adjusted accordingly. This also cumulatively or alternatively implements the basic insight explained at the beginning that adjustment of the rolling caliber should be possible during rolling.
  • a method for adjusting the rolling caliber of a cross-rolling unit with at least two rolls can be characterized in that a spreading angle or setting angle and/or the axial position of a mandrel are adjusted during rolling in order to achieve the best possible rolling result.
  • the rolling caliber can also be adapted to any changes or abnormalities in the respective specific rolling process by moving the mandrel, be it in its spreading angle or setting angle or in its axial position in relation to the rolls.
  • the axial position of the mandrel is usually defined in relation to the rolling centre line or in relation to the line of passage of the workpieces through the respective cross-rolling unit and then the relative position of the mandrel on the rolling centre line or on the line of passage in relation to the rolls is determined.
  • This axial position can be determined and adjusted as required, in particular, by a mandrel holder, by a mandrel rod holder or by a mandrel position adjustment device holding the mandrel.
  • the spreading angle or angle of attack of the mandrel can be adjusted, which determines the angle between the mandrel and the workpiece.
  • the adjustable spreading angle allows, for example, ovality, eccentricity or the general shape of the hole to be changed or optimized as required.
  • At least two corresponding rollers are set to a certain rolling caliber or adjusted during rolling. Because the total rolling force to be applied is not applied by the drive of one roller, but by at least two drives of the two rollers, each drive of the rollers applies less force than when adjusting with one roller. For example, when adjusting two rollers, half the force required when adjusting one roller can be applied. be.
  • the corresponding rolls are adjusted synchronously with a certain roll caliber or adjusted synchronously during rolling.
  • the roll center line may shift, but this may also may be desired.
  • this can also be prevented by moving the rollers exactly against each other or only changing their angle of inclination. This is very advantageous for the entire device, as the workpiece can also be moved further along its line.
  • rolling with straight-line transport of the workpiece can be achieved if necessary. operational safety can no longer be guaranteed.
  • a more precise roll caliber adjustment or roll caliber setting can also be provided by adjusting or setting at least two corresponding rolls than by adjusting or setting one roll.
  • roller mill positioning device In order to ensure a reliable and error-free rolling process, rolling forces can be applied continuously by driving the roller mill positioning device. This makes it possible to move or adjust the rollers even during rolling, as the risk of jamming or similar problems can be minimized.
  • a roller mill can be mounted so that it can be adjusted using several or only one roller positioning device. If there are several roller positioning devices for a roller mill, the roller positioning devices can be used to adjust the roller positioning devices. For example, targeted angle changes of the rollers can be made using the roller positioning devices. On the other hand, adjusting a roller mill using only one roller positioning device enables a simpler structure, which can be particularly advantageous for roller mills that support both sides of the rollers.
  • the adjustment of the roller, the rollers or the mandrel takes place as a function of determined measured variables, such as those already mentioned above, in particular not merely according to a previously determined rolling plan which depends only on the position of the workpiece or on the time.
  • the rolling center line is a theoretically and mechanically specified ideal line on which the rolling stock passes through the cross-rolling unit.
  • cross-rolling or cross-rolling units are distinguished from longitudinal rolling or longitudinal rolling units by the fact that the axes of the two rolls have a component parallel to a rolling center line of the cross-rolling unit or the cross-rolls.
  • the rolling surface of the rolls has a rotation component perpendicular to the rolling center line of the cross-rolling unit or the cross-rolls during rolling, which represents a different distinction from longitudinal rolling, in which the roll surface is moved parallel to the rolling center line or parallel to the direction of movement of the material.
  • the rolling caliber describes in particular the free space that the cross-rolling unit leaves for the workpiece during rolling. It therefore includes in particular the position of the rollers and, if present, the mandrel. However, particularly in connection with cross-rolling units, it also describes the position of the roller surface in relation to the workpieces in terms of its angle in relation to the rolling center line.
  • the cross-rolling units 10 shown in the figures each comprise at least two rolls 20 (see Figures 1 to 3 ) or three reels 20 (see Figures 4 to 7 ), which are carried in roller mills 21, which in turn are mounted on a roller stand 27 so as to be adjustable via a roller positioning device 22.
  • the rollers 20 can rotate about roller axes 25 and have rolling surfaces 26 which are successively coated with a Figure 8 come into contact with the elongated workpiece 32 shown in more detail.
  • the workpiece 32 essentially runs along a rolling center line 11, which roughly represents the center of gravity of the material passing through and - more precisely - represents the axis from an inlet roller table (not shown) through the center of the rolling unit to an outlet roller table (not shown).
  • roller axes 25 are aligned essentially parallel to the roller center line 11, whereby in the present embodiment a slight inclination angle of between 5° and 8° is provided. In different embodiments, other inclination angles can of course also be used, if necessary also with respect to the horizontal. be provided.
  • rollers 20 themselves have a relatively complex rolling surface 26, which in turn leads to a relatively complex rolling caliber and in particular, this also leads to a different load on the respective roller mills 21 of a roller 20.
  • roller axes 25 can also be inclined relative to the horizontal, which can possibly be provided for in the case of cross-rolling units 10 even without a load.
  • the roller positioning device 22 of the Figures 1 and 2 The embodiments shown are connected to the roller stand 27 via longitudinal beams which serve as attack points 24, so that the rolling forces are guided into the roller stand 27 via the attack points 24 or via the connection between the attack points 24 and the roller stand 27, which can be referred to as attack 23, which leads to a corresponding springing of the roller stand 27, which can ultimately lead to a corresponding non-uniform loading of the roller stand 27 in accordance with the non-uniform loading of the rollers 20 and the roller mills 21 already indicated above.
  • a solid roller stand 27 is provided, in which in the embodiment according to Figures 4 and 5 a thread to a roller positioning device 22 and in the embodiment according to Figures 6 and 7 a hydraulic cylinder and piston arrangement are introduced, which can be used to adjust the rollers 20 and defined as an attack 23. It is understood that in different embodiments, if necessary, also in the embodiment according to Figures 6 and 7 Threads can be provided as roller positioning devices, while in the Figures 4 and 5 In the embodiment shown, hydraulic roller positioning devices 22 can also be used instead of the threads.
  • Each roller mill 21 is mounted on the roller stand 27 so that it can be adjusted by two roller positioning devices 22. This allows the roller axes 25 in particular to be adjusted at an angle to the roller center line 11 or non-uniform load changes to be counteracted.
  • each roller mill 21 has only one roller positioning device 22, which is structurally simpler to implement.
  • roller positioning device 22 even in the embodiments according to Figures 2 to 5 only one roller positioning device and/or one hydraulic roller positioning device 22 can be provided, while in the embodiment according to Figures 6 and 7 if necessary, two roller positioning devices 22 or mechanical roller positioning devices 22 can be provided. Mechanical and hydraulic roller positioning device 22 may be combined if necessary. Other roller positioning devices 22, such as piezoelectric or pneumatic adjustments, may also be provided.
  • the rolling surface 26 of the rollers 20 has a movement component perpendicular to the rolling center line 11 of the cross-rolling unit 10 during rolling.
  • the axes 25 of the two rollers 20 also have a component parallel to the rolling center line 11 of the cross-rolling unit 10, as can be seen directly from the figures.
  • the path 40 between the two roller mills 21 of both rollers 20 is measured by arranging a path measuring system 41 between roller covers 50 on the roller mills 21 and reference covers 60 arranged on the respective roller mill 21, whereby the measurement can also be carried out without further ado during rolling.
  • the roller cover 50 of a first roller mill 21 can be specifically referred to as the reference reference 60 of the second roller mill 21 using the same position measuring system 41.
  • only a single position measuring system 41 can be used, which can then only be used between two roller mills 21 or covers 50, 60, each of which is provided on one of the two rollers 20, which, however, can then only make a somewhat less precise statement about the respective roller caliber.
  • the respective ends of the path measuring system 41 are attached directly to the roller mills 21, so that the roller mills 21 themselves serve as roller reference points 51 or reference reference points 61. Accordingly, the roller mills 21 also serve as the respective reference for measuring the path 40 to the other roller mill 21.
  • roller reference points 51 or reference reference points 61 can also serve as roller reference points 51 or reference reference points 61, as is the case in the embodiment according to Figure 3 is shown as an example.
  • projections are provided as roller reference point 51 and reference reference point 61, respectively, wherein the projections for the roller reference point 51 are arranged on the roller mills 21 and the projections for the reference reference points 61 are arranged on a separate reference frame 62.
  • the reference frame 62 is decoupled from the roll stand 27 so that it provides a reference or reference reference 61 independently of the respective rolling forces.
  • the latter is also the case in the embodiment according to Figures 4 and 5 the case, whereby the roller reference points 51 or the roller covers 50 are provided on the roller frames 21, which, however, can also be provided on other assemblies in different embodiments, as is the case in the embodiment according to Figures 6 and 7 which also uses a reference frame 62.
  • a distance measurement between the rollers 20 or the roller mills 21 can be carried out, as is exemplified by the example in Figure 2 illustrated embodiment.
  • the embodiments according to Figure 3 to 7 the path 40 between the roller frames of the rollers 20 and a reference provided outside the attack 23 is measured.
  • the reference reference 61 is arranged outside the attack point 24 of the roller positioning device 22 of the roller frame 21 engaging the roller stand 27.
  • resistance sensors, capacitive sensors and/or inductive sensors are used as distance measuring systems 41 or for distance measurement.
  • optical distance meters, ultrasonic sensors or radar sensors can also be used accordingly.
  • FIG. 8 The embodiment shown schematically illustrates a piercing process of a workpiece 32 by means of a mandrel 30 and two rollers 20. A corresponding procedure can be used in particular in conjunction with the other cross-rolling units 20 presented here.
  • hollow blocks can alternatively be rolled with a mandrel 30 as an internal tool with corresponding cross-rolling units 10. Internal tools or mandrels 30 can also be dispensed with if necessary, regardless of whether a block or a hollow block is cross-rolled as a workpiece 32.
  • control and measurement variables are shown which can be used advantageously for a multi-variable control 70 among other control and measurement variables as input variables or as output variables in all embodiments shown here. It is understood that if necessary, only individual measurement and control variables can be used and individual ones of these measurement and control variables can be dispensed with or other measurement and control variables and variables derived therefrom can be used for the multi-variable control 70.
  • the workpiece entry speed 71, the workpiece exit speed 72, the wall thickness 73, the eccentricity 74, the outside diameter 75, the ovality 76, the rolling force 77 and the mandrel holding force 78 can serve as measurement variables and are in the Figure 8 shown schematically.
  • These measurements and other measurements as well as the Quantities derived from measured variables can then serve as input variables of the multi-variable control 70, as shown in Figure 9 shown as an example.
  • an adjustment 80 of the spreading angle, a dynamic positioning adjustment 81 of the rollers 20 used here as upper and lower rollers, a dynamic adjustment 82 of the roller center by synchronously adjusting the rollers used as upper and lower rollers and the dynamic adjustment 83 of the mandrel position are schematically shown as control variables.
  • control variables can be implemented, if necessary, by individual output variables to the respective roller positioning devices 22 and a mandrel position adjustment device 31 holding the mandrel 30, while in the present embodiment these control variables each address the associated actuators, i.e. the roller positioning devices 22 and the mandrel position adjustment device 31, together in order to ensure, for example, a synchronous movement of the rollers 20.
  • the adjustment 80 of the spreading angle can be achieved, for example, by a corresponding adjustment of the mandrel 30 with the mandrel position adjustment device 31 perpendicular to the roll center line 11 or by the dynamic adjustment 82 of the roll center.
  • the mandrel position adjustment device 31 can also adjust the axial position of the mandrel 30, i.e. its position in relation to the rollers 20 seen along the roller center line 11, which can also be used as a control variable if necessary.
  • All control variables shown in this embodiment can be adjusted, in particular during rolling.

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Claims (16)

  1. Unité de laminage oblique (10) comprenant au moins deux rouleaux (30) et un support de rouleau (27), dans lequel au moins l'un des rouleaux (30) est monté de manière à pouvoir être réglé en sa position pour modifier le calibre de laminage dans sa position, caractérisée en ce qu'un dispositif de positionnement de rouleau (22) comprend une partie liée au support et une partie liée au laminoir (21) pouvant être déplacée par rapport à celle-ci pendant le laminage, qui sont ajustables l'une par rapport à l'autre, et en ce qu'un entraînement du dispositif de positionnement de rouleau (22) est dimensionné de manière à pouvoir appliquer des forces de laminage, le dispositif de positionnement de rouleau (22) comprenant au moins un vérin hydraulique et étant modifiable dans sa position pendant le laminage, le dispositif de positionnement de rouleau (22) comprenant au moins un vérin hydraulique déplaçable et pouvant fonctionner avec plus de 50.000 hPa, qui peut être commandé par des vannes à commutation rapide de l'unité de laminage oblique (10).
  2. Unité de laminage oblique (10) selon la revendication 1, caractérisée en ce que la position de mandrin d'un mandrin (30) peut être ajustée parallèlement à la pièce pendant le laminage au moyen d'un dispositif d'ajustement de la position du mandrin (31).
  3. Unité de laminage oblique (10) selon la revendication 1 ou 2, caractérisée en ce que la hauteur de levage d'au moins un vérin hydraulique est inférieure à 150 mm, en particulier inférieure à 100 mm.
  4. Unité de laminage oblique (10) selon l'une quelconque des revendications 1 à 3, caractérisée en ce que deux dispositifs de positionnement de rouleau (22) sont prévus pour au moins l'un des rouleaux (30).
  5. Unité de laminage oblique (10) selon la revendication 1 à 4, caractérisée par une régulation multi-variables (70) comprenant au moins deux variables d'entrée et au moins une variable de sortie.
  6. Unité de laminage oblique (10) selon l'une quelconque des revendications 1 à 5, caractérisée en ce que les variables d'entrée et les variables de sortie peuvent toutes deux être déterminées par le dispositif de positionnement de rouleau (22) et/ou être transmises au dispositif de positionnement de rouleau (22), et/ou en ce que les variables d'entrée comprennent les grandeurs mesurées de vitesse d'entrée de la pièce (71), de vitesse de sortie de la pièce (72), d'épaisseur de paroi (73), d'excentricité (74), de diamètre extérieur (75), d'ovalité (76), de force de laminage (77) et/ou de force de maintien du mandrin (78), et/ou en ce que les variables de sortie comprennent les grandeurs d'ajustement de la position dynamique (81) d'au moins l'un des rouleaux (20), d'ajustement du centre de laminage (82) par ajustement de tous les rouleaux (20), d'ajustement dynamique de la position du mandrin (83) et/ou d'ajustement de l'angle d'écartement (80), qui détermine l'angle entre le mandrin (30) et la pièce.
  7. Unité de laminage oblique (10) selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'au moins un vérin hydraulique peut être déplacé à une vitesse supérieure à 30 mm/s.
  8. Procédé de réglage du calibre de laminage d'une unité de laminage oblique (10) comprenant au moins deux rouleaux (20), caractérisé en ce qu'au moins l'un des rouleaux (20) est ajusté pendant le laminage.
  9. Procédé de réglage du calibre de laminage après la revendication 8, caractérisé en ce que l'angle d'écartement (80), qui détermine l'angle entre le mandrin (30) et la pièce, est ajusté pendant le laminage.
  10. Procédé de réglage du calibre de laminage après la revendication 8 ou 9, caractérisé en ce que la position axiale d'un mandrin (30) est ajustée pendant le laminage.
  11. Procédé de réglage du calibre de laminage selon l'une quelconque des revendications 8 à 10, caractérisé en ce qu'un seul rouleau (20) est réglé par rapport au deuxième rouleau fixe (20) avec un calibre de laminage spécifique et/ou est ajustée pendant le laminage.
  12. Procédé de réglage du calibre de laminage selon l'une quelconque des revendications 8 à 11, caractérisé en ce qu'au moins deux rouleaux correspondants (20) sont réglés avec un calibre de laminage spécifique.
  13. Procédé de réglage du calibre de laminage selon l'une quelconque des revendications 8 à 12, caractérisé en ce qu'au moins deux rouleaux correspondants (20) sont ajustés pendant le laminage.
  14. Procédé de réglage du calibre de laminage selon la revendication 13, caractérisé en ce qu'au moins deux rouleaux correspondants (20) sont réglés de manière synchrone avec un calibre de laminage spécifique et/ou sont ajustés de manière synchrone pendant le laminage.
  15. Procédé de réglage du calibre de laminage selon l'une quelconque des revendications 8 à 14, caractérisé en ce que des forces de laminage sont appliquées de façon continue par l'entraînement du dispositif de positionnement du laminoir (22).
  16. Procédé de réglage du calibre de laminage selon l'une quelconque des revendications 8 à 14, caractérisé en ce que l'ajustement du rouleau (20) et/ou du mandrin (30) est effectué en fonction des grandeurs mesurées.
EP20785907.5A 2019-09-05 2020-09-07 Unité de laminage transversal et procédé de réglage du passage de rouleau d'une unité de laminage transversal Active EP4025359B1 (fr)

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DE102019123836.6A DE102019123836A1 (de) 2019-09-05 2019-09-05 Schrägwalzaggregat sowie Verfahren zum Anstellen des Walzkalibers eines Schrägwalzaggregats
PCT/DE2020/100779 WO2021043374A1 (fr) 2019-09-05 2020-09-07 Unité de laminage transversal et procédé de réglage du passage de rouleau d'une unité de laminage transversal

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EP (1) EP4025359B1 (fr)
JP (1) JP2022548209A (fr)
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WO (1) WO2021043374A1 (fr)

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EP1459813A2 (fr) * 2003-03-21 2004-09-22 Sundwig GmbH Cylindre de réglage pour le laminage d'acier ou du métal non ferreux

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DE2516850C3 (de) * 1975-04-17 1983-05-05 Achenbach Buschhütten GmbH, 5910 Kreuztal Meßeinrichtung zur Ermittlung des Abstandes der Einbaustücke eines Walzgerüstes als Regelgröße für die Walzspaltsregelung
JPS53149858A (en) * 1977-06-03 1978-12-27 Hitachi Ltd Controlling method for wall thickness of seamless pipe in rolling mill
DE2820865C2 (de) * 1978-05-10 1980-07-03 Mannesmann Ag, 4000 Duesseldorf Vorrichtung zum Herstellen von Rohren
JPS5825809A (ja) * 1981-08-10 1983-02-16 Kawasaki Steel Corp 傾斜式圧延機の圧延制御方法
JPS613608A (ja) * 1984-06-15 1986-01-09 Sumitomo Metal Ind Ltd 傾斜ロ−ル圧延機の寸法制御方法
DE3622678A1 (de) * 1985-07-12 1987-01-15 Kocks Technik Verfahren und vorrichtung zum querwalzen nahtloser rohrluppen
DE3530343A1 (de) * 1985-08-24 1987-02-26 Kocks Technik Verfahren zum hohlwalzen
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AT407614B (de) * 1999-03-01 2001-05-25 Voest Alpine Ind Anlagen Verfahren zur steuerung eines langhubigen, hydraulischen stellzylinders
ITMI20011860A1 (it) * 2001-09-04 2003-03-04 Danieli Off Mecc Gabbia di laminazione universale con controllo di luce dei cilindri
DE102008022161A1 (de) * 2008-05-05 2009-11-12 Sms Meer Gmbh Walzvorrichtung zum Schrägwalzen von rohr- oder stabförmigem Walzgut
BR112012000449B1 (pt) * 2009-08-11 2020-09-29 Nippon Steel Corporation Dispositivo para ajuste de posições de laminação de cilindros de laminação que constitui o laminador sobre mandril de três cilindros e método para fabricar canos ou tubos sem costura
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CN114375231A (zh) 2022-04-19
WO2021043374A1 (fr) 2021-03-11
EP4025359A1 (fr) 2022-07-13
US20220339683A1 (en) 2022-10-27
JP2022548209A (ja) 2022-11-17
DE112020004223A5 (de) 2022-06-09
DE102019123836A1 (de) 2021-03-11

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