Reversible profile rolling method, profile roller assembly and profile roller tandem

Abstract

By avoiding the sheet-feeding process, the operational reliability of reversible profile rolling methods, profile roller assemblies, or profile roller tandems can be improved.

Description

[Technical Field]

[0001] Firstly, the present invention relates to a reversible profile rolling method using at least one profile roller assembly comprising profile rollers that form a roller gap (Walzkaliber) and deform the rolled material, wherein the rolled material passes through the profile rollers in a first rolling direction in a first pass and is deformed thereafter, the rolling direction is reversed and the rolled material passes through the profile rollers in a second pass in a second rolling direction opposite to the first rolling direction and is deformed thereafter. Secondly, the present invention relates to a profile roller assembly comprising profile rollers having an inlet side and an outlet side that form a roller gap and are arranged along a pass line. Thirdly, the present invention also relates to a profile roller tandem comprising at least two profile roller assemblies comprising profile rollers having an inlet side and an outlet side that each form a roller gap and are arranged along a pass line.

[0002] The corresponding profile roller assembly or profile roller tandem is known, for example, from European Patent No. 0256409, German Patent Application Publication No. 3730471, European Patent Application Publication No. 1232807, European Patent No. 0256409, German Patent Invention No. 10103683, German Patent Invention No. 10241516, Japanese Unexamined Patent Application Publication No. 2000-312902, or German Patent Invention No. 3417500. Such a profile roller assembly is used, in particular, to provide a semi-finished metal product in the form of a long product, especially to provide a long profile in a rolled form, in particular profile steel or section steel. In this case, the corresponding profile roller assembly comprises at least two rollers forming a roller gap, at least one of these rollers being a profile roller and the other roller being able to be a profile roller as well or a universal roller. In particular, in a profile roller tandem in which at least two roller assemblies are arranged along the pass line, if only one of the two roller assemblies arranged along the pass line is a profile roller, since the roller gap formed by this profile roller tandem as a whole is used for the rolling of the profile, finally, it is sufficient to provide a profile roller tandem consisting of at least two profile roller assemblies forming the roller gap and consisting of profile rollers arranged along the pass line.

[0003] In this case, in order to utilize the profile roller assembly as efficiently as possible and to achieve the desired effect on the microstructure of the rolled workpiece, it is known that each workpiece to be processed is rolled multiple times, i.e., in multiple passes, by the same profile roller assembly. In particular, multiple passes can be used to limit the degree of stretching (Laengung), and therefore deformation in each pass, so that each pass does not adversely affect the microstructure. When multiple passes should be performed with a profile roller assembly, it has been found to be advantageous, especially for time and temperature control reasons, to implement a reversible method in which the workpiece first passes through the relevant profile roller assembly, then its direction of motion is reversed, and it passes through the profile roller assembly again.

[0004] The object of the present invention is to provide a reversible profile rolling method, a profile roller assembly, and a profile roller tandem that are as reliable as possible in operation.

[0005] The problems of the present invention are solved by a reversible profile rolling method, profile roller assembly, or profile roller tandem having the features of the independent claims. In some cases, other advantageous embodiments independent of this are also described in the dependent claims and the following description.

[0006] In this case, the present invention is based on the common idea that the operational reliability of a reversible profile rolling method, a profile roller assembly, or a profile roller tandem can be improved by avoiding the sheet-feeding process (Einfaedelvorgaenge).

[0007] Therefore, operational reliability can be improved in a reversible profile rolling method using at least one profile roller assembly comprising profile rollers that form a roller gap and deform the rolled material, in particular when the rolled material passes through the profile rollers in a first rolling direction in a first pass and is deformed thereafter, then the rolling direction is reversed and the rolled material passes through the profile rollers in a second rolling direction opposite to the first rolling direction in a second pass and is deformed thereafter, and when the profile rolling method is characterized in that the rolled material is first passed through the profile rollers by expanding the pass, and only then do the profile rollers come into contact with the rolled material for deformation. In such an implementation, provided that the profile roller assembly is properly designed and the profile rolling method is not otherwise implemented unproductively, it can be ensured that the rolled material does not damage the profile rollers because the expanded pass allows the rolled material to pass through the profile rollers, and only then do these profile rollers come into contact with the rolled material for deformation. Therefore, in order to avoid potential damage to the profile rollers with greater operational reliability, the degree to which the passage is substantially expanded during introduction is crucial. If the passage is sufficiently expanded, the rolled material is ultimately placed between the rollers rather than being passed through them, and the rollers only then come into contact with the roller gap, i.e., appropriately for deformation, thus minimizing or almost completely avoiding the risk of breakage (havarie).

[0008] In this context, the pass line refers to an ideal line that passes through each profile roller assembly, or a corresponding arrangement of roller assemblies or profile roller assemblies, along which the rolled material passes through the rollers or profile rollers. Depending on the specific embodiment of the rolling equipment in question, or the specific definition of the pass line, the pass line can, for example, represent the approximate center of the rolled material passing through. On the other hand, it is also common to standardize the pass line to match the inlet or outlet roll trajectory, and to align the height of the pass line with the running surface of one or more roll trajectories. Ultimately, the pass line is a defined or hypothetical line that passes through each rolling equipment and is considered a corresponding reference for the assembly to be positioned or contacted with respect to the rolled material passing through. Since these are relative values, if a different pass line is selected, these relative values ​​must be converted accordingly.

[0009] Assuming the definition of a pass line is correct, the term "pathway" refers to the contact of the profile roller with respect to the pass line, thereby resulting in an "extended pathway" having a correspondingly extended position.

[0010] The method proposed above results in a first region of the rolled material receiving only the pressing force perpendicular to the pass line that the profile rollers apply to the rolled material during contact for deformation, precisely at the start of the rolling process. This means that, unlike conventional profile rolling methods, the first region of the workpiece is compressed rather than rolled at the start of the profile rolling process.

[0011] However, implementing this method has been shown to significantly reduce the risk of breakage, although in this first region the rolled material is not rolled to the extent that the remainder of the rolled material is subsequently rolled. Since each end of the rolled material is usually post-processed, rolled elsewhere, for example in a subsequent pass, or discarded in any case, the corresponding drawback of the first region of the rolled material not being rolled at the start of the rolling process is acceptable. In particular, it may be advantageous to extend the passage, rather than merely avoiding contact with the rolled material, by considering a more sufficient safety gap or safety margin, especially when the rolled material is supplied with, for example, a specific straightness tolerance or variation in material thickness, in order to further reduce the risk of breakage.

[0012] Therefore, depending on the specific method implemented, it is possible that the rollers may come into contact with the rolled material during introduction, even if the passage is widened. On the other hand, even a slightly widened passage already significantly reduces the risk of serious damage, in which case the passage widening is broad enough to ensure that the rolled material does not come into contact with the rollers with the highest possible operational reliability during introduction, and thus advantageously avoid damage or minimize its impact.

[0013] In this specification, any material that can be rolled into a profile can be considered a rolled material. Such profiles can be profile steel, also called structural steel. Therefore, other rollable materials, such as plastics or sintered materials, can also be used as starting materials for the correspondingly rolled molded articles, in the former case, the effects of breakage are often not expected to be so severe. To that extent, all rollable materials that can be rolled into the corresponding profile can be used as starting materials for each profile rolling method, and therefore as rolled materials supplied to the profile roller assembly. Particularly preferably, metal slabs, blocks, blooms, or other semi-finished products can be used as starting materials or as rolled materials supplied to each profile roller assembly. Accordingly, profiles, both as semi-finished and finished products, i.e., long products having the corresponding profile cross-section, are well known in the market as, for example, H-beams, W-beams, or I-beams, angle profiles, U-beams, L-beams, or T-beams, or as sheet piles, rails, circular or polygonal billets, or other long or flat products or special profiles. Therefore, structural steel and profiled steel, in particular, are fairly well known in the market as products of such profile rolling methods.

[0014] The profile cross-section of a profile rolled by a profile rolling method is provided by the respective roller gap, which is the free space between the relevant profile rollers of each profile roller assembly, and this free space is left for the rolled material as it passes along the pass line through each profile roller assembly. Unlike the cross-section of the incoming rolled material, if a portion of the profile rollers obstructs the rolled material, material displacement (Verdraengung) occurs, but the extent to which this displacement occurs along the pass line, and therefore at least partially as elongation, or perpendicular to the pass line, and therefore as profile change, depends on the relevant rolling conditions.

[0015] To that extent, only after the passage is widened and the rolled material is passed between the profile rollers, and only then, when the profile rollers come into contact with the rolled material and therefore with the pass line for deformation processing, does a corresponding effect occur on the material of the rolled material.

[0016] Therefore, the term “profile roller assembly” in this context means any assembly consisting of at least two rollers that is suitable for, and is intended for, rolling and providing a profile. In this case, the rollers are, needless to say, typically profiliert rollers, which can provide a corresponding roller gap for deforming the rolled material into a profile. However, depending on the specifically desired profile, at least one of the rollers in the relevant roller assembly may be a universal roller, which is not profiliert itself but has a cylindrical roller surface.

[0017] In this case, the number of rollers in a profile roller assembly is not limited to two. That is, it is possible for three or more rollers to form a roller gap together and thus constitute a profile roller assembly. In this case, it is particularly known to combine vertical and horizontal rollers, in which case the horizontal rollers usually have a horizontally oriented roller axis and are often cross-sectionally formed, while the vertical rollers have a vertical roller axis and are often universal rollers, which are either cross-sectionally unformed or have a cylindrical roller surface.

[0018] In this context, the term “profile roller assembly 30 bri” means a roller assembly consisting of rollers that form a common roller gap, thereby allowing the rollers to act together and cooperate on the rolled material, and is suitable for and intended to deform the rolled material into a profile.

[0019] In this case, needless to say, several of these profile roller assemblies can be arranged along the pass line and combined front to back. If at least two profile roller assemblies are arranged in proportion to the pass line, then in many cases this is a profile roller tandem, even if it has, for example, three or more profile roller assemblies arranged along the pass line. In this sense, all of these profile roller assemblies are suitable for ultimately deforming the rolled material into a profile, and in this regard, all of these roller assemblies are called profile roller assemblies, and all of these rollers are called profile rollers, even if the individual rollers or individual roller assemblies are simply universal rollers or include universal rollers. To that extent, preferably, if only one roller in the entire profile roller tandem is a cross-sectionally formed roller, it is sufficient even if there is doubt as to whether the entire assembly should be called a profile roller tandem consisting of at least two profile roller assemblies of profile rollers arranged along the pass line. In special cases, when a profile having a purely rectangular cross-section is to be manufactured by a profile rolling method, particularly by a reversible profile rolling method, then in some cases all of the profile rollers can even be designed as universal rollers.

[0020] In particular, the profile roller assemblies or profile roller tandems described above are suitable for and are designed for performing a reversible profile rolling method. For this purpose, they have, for example, the capability for corresponding drive reversal. Preferably, the inlet or outlet is also designed for the corresponding rolled material length produced by the reversible profile rolling process.

[0021] Therefore, the term “reversible profile rolling method” means, on the one hand, any rolling method that is performed by reversing the process of deforming a rolled material into a profile using rollers, i.e., by reversing the direction of passage and by rolling deformation in at least two passes.

[0022] Considering the fundamental idea of ​​avoiding the sheet-feeding process to improve operational reliability as explained at the beginning, and knowing that the above method of first expanding the passage to pass the rolled material between the profile rollers and then bringing the profile rollers into contact with the rolled material for deformation processing is implemented, in addition to or instead of the combination of features described herein, it may be advantageous if the rolled material remains in contact with at least one of the profile rollers during reversal. This firstly results in the rolled material being able to reverse with the profile roller in which it remains in contact during reversal without the risk of breakage during reversal. Thus, operational reliability can also be improved.

[0023] To that extent, regardless of the combination of other features mentioned above, in a reversible profile rolling method using at least one profile roller assembly consisting of profile rollers that form a roller gap and deform the rolled material, it is advantageous for improved operational reliability if the rolled material passes through the profile rollers in a first rolling direction in a first pass, is deformed therein, and then the rolling direction is reversed, and the rolled material passes through the profile rollers in a second rolling direction opposite to the first rolling direction in a second pass, is deformed therein, and the reversible profile rolling method is characterized in that the rolled material remains in contact with at least one of the profile rollers during the reversal. Thus, unlike the conventional method in which the rolled material passes through all profile rollers before the reversal, here the reversal occurs in the region of the roller, in particular, while the rolled material remains in contact with at least one of the rollers. In particular, in this case, the risk of damage to this roller can be avoided very effectively.

[0024] In particular, it is advantageous that during reversal, the rolled material remains in contact with at least two rollers acting on it on opposing sides, or with rollers forming a common roller gap, thereby firmly holding the rolled material during the reversal of these rollers, which further reduces the risk of breakage, especially if, for example, the material is to be passed through further by other rollers of another profile roller assembly after reversal. In such cases, to avoid breakage, an expanded passage can be provided in the latter profile roller assembly, as already described in the introduction of the rolled material.

[0025] Therefore, it may be particularly advantageous if the rolled material remains in contact with all the profile rollers of the profile roller assembly during reversal, in which case the rolled material is passed through the entire roller gap accordingly, thus ensuring stable guidance of the rolled material as this reduces the risk of breakage.

[0026] The aforementioned approach aims to ensure that all profile rollers in a profile roller assembly remain in contact with the rolled material during reversal, but this is not necessarily true for all profile roller assemblies if all profile roller assemblies are positioned along the pass line. In such embodiments, it may be sufficient for only the last profile roller assembly to remain in contact with the rolled material in the direction of motion before reversal, while the remaining profile roller assemblies lose contact with the rolled material before reversal. Even in such implementations, the risk of breakage can be significantly reduced, as the last profile roller assembly provides good guidance, especially if the remaining profile roller assemblies are not brought into contact with the pass line too rapidly.

[0027] On the other hand, it is needless to say that the risk of breakage can be reduced when not only the profile rollers of a single profile roller assembly but also at least one profile roller of another profile roller assembly or all the profile rollers of another profile roller assembly remain in contact with the rolled material during reversal.

[0028] Depending on the specific method implementation, it may also be advantageous if one roller of each of two roller assemblies arranged along the pass line remains in contact with the rolled material during reversal.

[0029] In particular, the operating reliability can be improved when all profile roller assemblies remain in contact with the rolled material during reversal with at least one of their profile rollers, preferably even more or all of their profile rollers. <>

[0030] In such a method implementation, of course, there is a risk that each end of the rolled material does not contact all the rollers of all profile roller assemblies in such a way that they affect or deform the remaining rolled material. However, if this is important in the final result or if the remaining ends are not regarded as defective anyway, it can be addressed in some cases, for example, by increasing the contact during rolling or by another suitable post-processing.

[0031] In particular, when the rolled material first expands the passage and is passed between 30 profile rollers and then is first brought into contact with them for deformation processing against the rolled material, this can be done, that is, at the start of the rolling process but also during reversal, and / or in particular, if the rolled material remains in contact with at least one of the profile rollers during reversal, additional guides for the rolled material can be omitted in some cases.

[0032] In this context, the term "guide" primarily refers to the process-technical guidance of the rolled material so that it reaches the roller gap with as little damage as possible. On the other hand, the term "rolled material guide" also refers to the physical arrangement in which the corresponding guide is physically realized, ultimately resulting in the rolled material reaching each roller gap without damage through guide contact.

[0033] Therefore, regardless of the combination of features described above, a profile roller tandem comprising a profile roller assembly consisting of at least two roller gaps and profile rollers arranged along a pass line is considered advantageous in order to improve operational reliability, characterized in that roll guides are omitted at the inlet side of the profile roller assembly, between the profile roller assemblies, and / or at the outlet side of the profile roller assembly. Such embodiments, in particular in consideration of the implementation of the method described above, allow for a much simpler or less complex structure of the profile roller tandem, which thus further improves operational reliability by preventing any malfunctions caused by the roll guides.

[0034] Furthermore, the omission of roll guides between profile roller assemblies allows for significantly closer placement of each profile roller assembly along the pass line, as there is no need for additional installation space for roll guides between each profile roller assembly. Moreover, this closer placement further reduces the possibility of the incoming workpiece, already guided by the first of the two profile roller assemblies, deviating from or separating from the pass line, which could ultimately lead to breakage.

[0035] Therefore, regardless of the presence or absence of roll guides, the maximum roller diameter can be assigned to each of the two profile roller assemblies, and it is advantageous when the two profile roller assemblies are spaced less than half the larger of the two maximum roller diameters apart, in which case, firstly, it is not at all important whether or not further roll guides are provided between these two profile roller assemblies. On the other hand, in particular, in this case, it goes without saying that the corresponding roll guides can be omitted, which brings additional advantages in addition to the advantages mentioned above.

[0036] Therefore, regardless of the combination of other features mentioned above, it is advantageous for a profile roller tandem, which consists of at least two profile roller assemblies, each forming a roller gap and arranged along a path line, to be characterized in that, in order to improve operational reliability, a maximum roller diameter is assigned to each of the two profile roller assemblies, and they are spaced apart from each other by less than half of the larger of the two maximum roller diameters.

[0037] By omitting the roll guide, or by arranging the two profile roller assemblies in very close proximity, the number of sheet metal passing processes can be minimized in a profile roller tandem, especially if it is further appropriately designed and the method implementation is more appropriately selected, or the risk of such sheet metal passing processes failing can be minimized.

[0038] First, while each profile roller assembly can be assigned a maximum roller diameter, this does not necessarily have to be adhered to by the rollers installed in each assembly. Structurally, in the case of a profile roller assembly, the maximum roller diameter is limited, for example, by the maximum possible stroke for each roller. The distance to other units, such as tie rods, roll guides, or similar assemblies located near the rollers, and other structural conditions can also limit or determine the maximum roller diameter for which a particular profile roller assembly is suitable. On the other hand, this does not mean that a profile roller assembly must be equipped with rollers having the maximum roller diameter. Rather, rollers with smaller diameters may be used if it is deemed advantageous in the specific application.

[0039] First, regarding the definition of the spacing between profile roller assemblies, it seems sufficient if this spacing is defined by the maximum roller diameter to which each is assigned. On the other hand, it is also conceivable that two profile roller assemblies each have rollers of corresponding maximum roller diameters, thereby allowing the actual diameter of the rollers specified for each application of the related profile roller assemblies to be used as a dimension. In this case, it seems advantageous that the two profile roller assemblies are spaced less than half the larger of the two maximum roller diameters apart.

[0040] On the contrary, it is conceivable that two profile roller assemblies may be spaced less than a quarter of the sum of their maximum roller diameters, especially considering that the maximum roller diameter may be defined by the rollers actually present, or further by the allocation or design of each profile roller assembly. In particular, when two profile roller assemblies are spaced less than a quarter of the sum of their maximum roller diameters, the risk of the rolled material separating between the two profile roller assemblies can be minimized, even if the rolled material guide is omitted in some cases. In such cases, this omission may create the structural space necessary to position the two profile roller assemblies in close proximity, front to back, along the pass line.

[0041] In particular, the two profile roller assemblies can be spaced apart by less than 0.2 times, preferably less than 0.1 times, the sum of the two maximum roller diameters, meaning that adjacent profile rollers of each of the two profile roller assemblies are in near contact with each other when rollers with the maximum allowable roller diameters are used, respectively. Such a small distance between profile roller assemblies further reduces the risk of roll detachment, thereby increasing the likelihood of omitting roll guides, especially between the profile roller assemblies. This also, in some cases, further reduces the risk of breakage, as already mentioned above.

[0042] Regardless of the combination of features described above, a reversible profile rolling method using at least one profile roller assembly comprising profile rollers that form a roller gap and deform the rolled material, wherein the rolled material passes through the profile rollers in a first rolling direction in a first pass and is deformed thereafter, the rolling direction is reversed and the rolled material passes through the profile rollers in a second rolling direction opposite to the first rolling direction in a second pass and is deformed thereafter, characterized in that the rolling speed of the rolled material is changed during the deformation process. Such an approach makes it possible to change the deformation action of the rollers, which is advantageous when the rolled material does not, for example, contact the rollers over its entire length, particularly during reversal or at the start of the deformation process, which can occur, for example, when the passage is first expanded to pass between the profile rollers and only then do the profile rollers come into contact with the rolled material for deformation, or when at least one or more of the profile rollers remain in contact with the rolled material during reversal. Depending on the specific method implementation, in particular, reversal can be performed with higher operational reliability because abrupt changes in direction can be avoided. When a reversal point is reached, whether at a selected point in the method sequence or at a specific location in the region of each rolled material end, the rolling speed can be reduced to facilitate reversal. Therefore, in a proper method implementation, changing the rolling speed of the rolled material during deformation processing allows for the avoidance of the passing process and, consequently, a corresponding improvement in operational reliability.

[0043] To ensure that changes in rolling speed can be made with the highest possible operational reliability, it is advantageous that each speed is determined by a speed determination device. In particular, a position measuring means can also be provided to measure the position of the rolled end of the rolled material during deformation, either cumulatively or alternatively, thereby allowing the motion sequence of the rolled material to be fully known and / or fully controlled, especially before reversal.

[0044] Therefore, a profile roller assembly comprising profile rollers with an inlet side and an outlet side that form a roller gap and are positioned along a pass line has proven advantageous when it has a speed determining device for determining the rolling speed of the rolled material and / or a position measuring means for measuring the position of the rolled material end during deformation, in order to reasonably improve operational reliability.

[0045] Ultimately, any device capable of determining the rolling speed of a rolled material can be advantageously used as a speed determination device. In particular, this could be, for example, a microwave measuring device, an infrared measuring device, or a radar measuring device, but in some cases, an acoustic measuring device. Similarly, an assembly of an optical barrier or a position measuring means provided along the pass line and capable of measuring the position of the roller ends can be used for speed determination. In this case, the accuracy of speed determination can be appropriately selected by the distance of the corresponding position measuring means, as long as the closer distance provides a speed measurement accuracy interval that is set to be correspondingly closer.

[0046] As a means of position measurement, for example, an optical barrier is particularly possible, but further, the radar measuring device or microwave measuring device mentioned above may also be considered. In some cases, the position measuring device or speed determining device may also be operated tactilely, for example, by contacting these rollers with the rolls of the inlet roll track or the outlet roll track, especially when the rollers do not deform. In some cases, the rollers themselves or the rotational speed of the rollers may also be used, during which any extension may be taken into consideration as needed.

[0047] In particular, as already described above, the speed measuring device may include positioning means, and possibly position measuring means used for position measurement, which has the advantage that both speed and position are known with sufficient precision. Depending on the specific requirements, the rotational speed of the roll or roller, or the results of speed measurement in addition to position measurement, can be used to control the reversal process more precisely, for example.

[0048] Not only a single profile roller assembly, but also a profile roller tandem, or an assembly consisting of multiple profile roller assemblies arranged along a path line, may be equipped with a speed determination device or position measuring means to achieve corresponding advantages.

[0049] In this regard, it should be noted that, quite generally, two or more profile roller assemblies can have a common rolling stand, especially if they are designed as a profile roller tandem. In particular, a common tandem stand, especially preferably a common tandem stand frame, can be used to position two profile roller assemblies of a profile roller tandem, or multiple profile roller assemblies of a profile roller tandem. This allows the common rolling stand or common stand frame to absorb the rolling forces of the profile roller assemblies together, which has been found to be particularly effective and stable. Furthermore, as already advantageous mentioned above, a common rolling stand also allows for very close configurations or spacings of the profile roller assemblies.

[0050] The passage can be widened to allow the rolled material to pass between two profile rollers, or to introduce the rolled material, particularly at the start of the corresponding rolling method, so that the rolled material does not come into contact with at least one of the profile rollers, preferably all of the profile rollers in the associated profile roller assembly. In particular, to widen the passage to allow the rolled material to pass between two profile rollers, or to introduce the rolled material, it is also conceivable to loosely place the rolled material on one, two, or more, particularly all of the lower profile rollers, so that one or more lower profile rollers support or support the rolled material between them. In this way, the risk of breakage can be minimized.

[0051] If multiple profile roller assemblies exist, and the rolled material only contacts one of the rollers in each of the roller stands or one of the profile rollers in each of the 10 profile roller assemblies, then this may already be sufficient, as no rolling force has yet been applied and the risk of significant damage is not very high.

[0052] In a specific advantageous implementation, after the rolled material has passed, the lower profile rollers of each profile roller assembly are first brought into contact with the pass line, so that the lower rollers are already in support contact with the rolled material until it reaches the final rolling stand, even though no rolling force has yet been applied. Only then, in exemplary and advantageous implementations, can all rollers be brought into contact with the rolled material to begin deformation. Needless to say, depending on the specific requirements, slightly different implementations are also conceivable, without deviating from the basic idea of ​​first expanding the passage to allow the rolled material to pass through the profile rollers, and only then bringing the profile rollers into contact with the rolled material for deformation.

[0053] Preferably, the rolling speed is controlled during deformation, particularly by closed-loop control. In this way, the rolling speed can be modified to suit the purpose. Similarly, the motion sequence of the rolled material can be controlled during reverse rotation.

[0054] In this case, open-loop or closed-loop control of the rolling speed can be performed depending in particular on the position of the rolled material relative to the profile roller assembly, which in particular enables a controlled motion sequence during reversal and is preferably achievable by measuring the position of at least one of the ends of the rolled material.

[0055] In particular, the rolling speed can be continuously reduced before reversal and continuously increased after reversal, thereby allowing the reversal process to proceed uniformly with high operational reliability and control. Consequently, the rolling speed is reduced to zero before reversal, then reversed, and then increased again. This means that, in the vector formulation of the rolling speed, the rolling speed crosses zero for the reversal. This zero crossing allows the reversal of the direction of motion to be defined accordingly.

[0056] Therefore, it is advantageous that the rolled material remains in contact with at least one profile roller, preferably multiple profile rollers, and especially all of them, during the reversal of the direction of motion.

[0057] This is particularly advantageous when the rolled material is deformed during, and therefore reversed, or immediately after, the reversal of the direction of motion. In a proper implementation, especially when the rollers are properly contacted or the roller pressure is appropriately adjusted, any potential artifacts that may occur, in which case the rolled material does not pass through all the rollers of the profile roller assembly in its end region, and thereby a particular region does not pass directly through all the roller gaps or passes beside all the rollers, can be addressed, for example, by appropriately increasing the roller pressure in that case.

[0058] In the specific implementation of the method sequence, the path during deformation can preferably be varied depending on the position of the rolled material relative to the profile roller assembly. This can be done particularly by precise reduction or precise expansion. Reduction, i.e., making the roller gap smaller, may be desirable, for example, immediately before reversal, in order to address the aforementioned artifacts. Conversely, expansion, i.e., making the roller gap larger, may be desirable after reversal, when a region of the rolled material that has already been rolled by another profile roller assembly or in a previously performed pass, and therefore no longer requires advanced deformation, reaches the profile roller assembly.

[0059] Therefore, as already mentioned above, it may be advantageous to change the path, particularly in connection with or during a reduction in the rolling speed.

[0060] As mentioned above, the rolling speed of a rolled material can be measured. Alternatively or cumulatively, it is advantageous to determine the rolling speed of the rolled material during deformation, that is, not to measure it directly. The latter can be done, for example, by determining or calculating the speed of the rolled material from the local position of each end of the rolled material, and then comparing the positional measurements.

[0061] The rolling speed of a rolled material can also be measured directly by the corresponding rolls in contact with the material. In this case, although positional measurements are usually relatively accurate, the rolling speed can only be ultimately extrapolated between these positional measurements, and therefore, such measurements can be compared to the position of the rolled material at a given time, or to the position of the end of the rolled material.

[0062] For example, direct measurements, such as those using a follow-up roll, are prone to errors, especially when unfavorable ambient environmental conditions present in the profile roller region are taken into account. These equally unfavorable ambient environmental conditions are also detrimental to direct velocity measurements, such as those performed using light, microwaves, or radar. In this case, too, it may be desirable to appropriately correlate such measurements with position measurements.

[0063] In addition, it is conceivable to calculate the rolling speed of each rolled material from the rotational speed of the profile rollers, in which case the calculation results could be compared to one or more positions of the rolled material end at a specified time, and in this way the motion sequence could be accurately known and, in some cases, accurately controlled, especially during reversal or inversion of the direction of motion.

[0064] Especially in the case of an odd number of passes, the rolled material enters on one side, then reverses direction and is rolled according to the number of passes, and then exits in the other direction. This profile rolling method can be easily incorporated into a rolling line or an overall rolling process, thereby providing a defined inlet and outlet side and enabling the rapid rolling of continuous workpieces.

[0065] Depending on the specific method implemented, as already described above, at least two profile roller assemblies, each consisting of profile rollers forming a 30-degree roller gap, can be arranged along the pass line, and the rolled material is first passed through the two profile roller assemblies by expanding the passage, and only then are these brought into contact with the rolled material for deformation. This is especially true when there are two or more profile roller assemblies, in which case, preferably, the rolled material is first passed through the two profile roller assemblies by expanding the passage, and only then are these brought into contact with the rolled material for deformation. On the other hand, as already described above, it is also conceivable that the individual rollers are already in contact with the rolled material when the rolled material passes over them, thus enabling a kind of intermediate guide (Zwischenfuehrung) for the rolled material during introduction. Once the rolled material has passed through all the profile roller assemblies, all the profile rollers can be brought into contact with the rolled material accordingly, and a rolling force can be applied.

[0066] Similarly, if at least two profile roller assemblies, each consisting of profile rollers forming a roller gap, are arranged along the pass line, the rolled material remains in contact with at least one of the profile rollers of the two profile roller assemblies during reversal, and if more than two profile roller assemblies are arranged along the pass line, it remains in contact with at least one of the profile rollers of all profile roller assemblies, thus minimizing the risk of breakage with high operational reliability.

[0067] Needless to say, the features of the solutions described above or in the claims can be combined in some cases, thereby accumulating and realizing a corresponding number of benefits.

[0068] Further advantages, objectives, and features of the present invention will be described in particular based on the following exemplary embodiments, which are also shown in the accompanying drawings. [Brief explanation of the drawing]

[0069] [Figure 1] This is a schematic side view of the first profile roller assembly when the rolled material is introduced. [Figure 2] This is a schematic side view of the first profile roller assembly at the start of the deformation process. [Figure 3] This is a schematic side view of the first profile roller assembly during deformation processing. [Figure 4] This is a schematic side view of the first profile roller assembly during reverse rotation. [Figure 5] This is a schematic side view of the second profile roller assembly before the introduction of the rolled material. [Figure 6] This is a schematic side view of the second profile roller assembly when the rolled material is introduced. [Figure 7] This is a schematic side view of the second profile roller assembly when the profile rollers are in contact. [Figure 8] This is a schematic side view of the second profile roller assembly just before the reversal. [Figure 9] This is a schematic side view of the second profile roller assembly during reverse rotation. [Figure 10] This is a schematic side view of the second profile roller assembly immediately after reversal. [Figure 11] This is a schematic side view of the second profile roller assembly during reverse rotation. [Figure 12] This is a schematic side view of the second profile roller assembly immediately after reversal. [Figure 13] This is a schematic side view of the second profile roller assembly during outflow. [Figure 14] This is a schematic side view of the third profile roller assembly.

[0070] The first profile roller assembly 20 shown in Figures 1 to 4 comprises an upper roller 22 and a lower roller 23, which are each designed as profile rollers 21. Needless to say, if the rolled material 10 to be deformed is to be rolled and cross-sectionally formed accordingly, then in some cases at least one of the rollers 22 and 23 can be designed as a universal roller, i.e., with a cylindrical cross-section.

[0071] The rollers 22 and 23 are positioned on the rolling stand 40 and are capable of contacting in the contact direction 36 in the direction of a pass line 30 that extends substantially parallel to the rolling direction 31 between the rollers 22 and 23 or between the profile rollers 21.

[0072] The pass line 30 is an ideal line through the profile roller assembly 20 and can also be defined, depending on the requirements, particularly by being offset in parallel. For example, the pass line 30 can also be defined relative to the surface of the inlet roll inlet 48 or the outlet roll track 49, as illustrated in Figures 5 to 14. Depending on the specific position of the pass line 30 relative to the rollers 22, 23, the contact of the profile rollers 21 in the direction of contact direction 36, which reduces the roller gap, i.e., the space remaining between the profile rollers 21 for the rolled material 10 during rolling, can also be set away from the pass line 30 if the pass line 30 is defined to contact or intersect the corresponding profile rollers 21. Inconsistent with this, in this specification, contact in the contact direction 36 means insofar as the corresponding motion of the relevant profile rollers 21 reduces the roller gap. Otherwise, the term "away from" (Ausstellen) is used, in which case this means the direction of the motion of the profile rollers 21 opposite to the contact direction 36.

[0073] The rolled material 10 has two rolled material ends 11, which are the ends of the rolled material 10 with respect to the pass line 30 or the rolling direction 31. Depending on the rolling direction 31, the rolled material end 11 located in the rolling direction 31 may also be called the rolled material start end or rolled material head end. As far as the reversal 5 is important in this specification, the resulting reversal of the direction of motion makes the distinction between the rolled material end 11 and the rolled material start end irrelevant in itself.

[0074] Naturally, the rolled material 10 can first reach between the rollers 22 and 23 of the profile roller assembly 20 from only one side, and this side is defined as the inlet side 33. Thus, the other side following the profile roller assembly 20 along the pass line 30 is called the exit side 34, and on the other side, for example, if an even number of passes or an odd number of reversals are performed, the rolled material 10 can eventually leave the profile roller assembly 20 again at the inlet side 33 after rolling. However, the above definitions of the inlet side 33 and exit side 34 are maintained to distinguish the two sides so that they can be distinguished accordingly below.

[0075] To form the cross section of the rolled material 10, the rolled material 10 is passed along the pass line 30, between the two profile rollers 21 or between the rollers 22 and 23, as illustrated in Figure 1, by expanding the passage at its rolled material end 11, more precisely, preferably so that the rolled material 10 does not come into contact with the two rollers 22 and 23 or the two profile rollers 21.

[0076] In an alternative implementation, the rolled material 10 may be relatively loose, simply resting on the lower roller 23, as long as the upper roller 22 is far enough away from the rolled material 10 so that it does not come into contact with the upper roller 22, even if it reaches or passes through the area between the rollers 22 and 23 at its end 11. This already decisively reduces the risk of breakage. Even if both the upper roller 22 and the lower roller 23 come into contact with the rolled material 10 during introduction between the profile rollers 21 or between the rollers 22 and 23, the risk of breakage can be decisively reduced if the passage between the rollers 22 and 23 is widened, for example, if no deformation force acts on the rolled material 10, or only a very small deformation force acts on it.

[0077] As shown in Figure 1, when the rolled material 10 is passed between the profile rollers 21 or between the rollers 22 and 23, the rollers 22 and 23 or the two profile rollers 21 come into contact with the rolled material for deformation, which is done in the contact direction 36 of the profile rollers 21, as further shown in Figure 1.

[0078] Next, a rolling force is applied by the contact of the profile roller 21 on the one hand, and the rolling process is started by offsetting the profile roller 21 or rollers 22, 23 in the rotational direction 37, thereby rolling the rolled material 10 in the rolling direction 31 along the pass line 30 from the inlet side 33 to the outlet side 34. In this case, first, the deformation zone 32 of the rolled material 10, which is deformed according to the roller gap provided by the profile roller 21, is brought only to the region of the rolled material end 11.

[0079] As shown in Figure 3, in this way, the rolled material 10 passes through the roller gap left between the two rollers 22, 23 or between the profile rollers 21 along the pass line 30 in the rolling direction 31 until it reaches the rolled material end 11 facing the opposite direction of this rolling direction 31.

[0080] Before the rolled material 10 ceases to contact the two rollers 22, 23 or the two profile rollers 21, the direction of motion is reversed, i.e., the rolling process is reversed, as illustrated in Figure 4. In this case, a small area of ​​the rolled material remains, preferably in the deformation zone 32, as illustrated in Figure 4.

[0081] Depending on the specific method implemented, the two profile rollers 21 or the upper roller 22 and lower roller 23 continue to contact the rolled material 10 by reversing the direction of motion. However, if, for example, this is used only for calibration, there may be processes in which contact is not necessary in the second pass.

[0082] During the reversal of the direction of motion, i.e., the contact between the profile roller 21 or the upper roller 22 and the lower roller 23 with respect to the rolled material can be performed as soon as the first pass is completed, i.e., before the reversal of the direction of motion, depending on the specific method implemented. In some cases, over-contacting (Ueberanstellen) or over-controlling (Uebersteuern) can be performed while the direction of motion is being reversed, for example, to address any potential artifacts that may be caused by changes in the rolling speed.

[0083] Depending on the specific method implemented, each speed can be controlled in an open-loop (steuern) or closed-loop (regeln) manner according to the position of the rolled material 10, or the position of one or both ends 11 of the rolled material. In particular, depending on the specific method implemented, it is conceivable to continuously change the rolling speed during rolling, which is considered particularly advantageous immediately before or after reversal.

[0084] The number of passes or reversals of motion can vary depending on the specific method implemented. When reversals of motion occur, it can already be called a reversible profile rolling method. As already mentioned above, in this case the rolled material exits towards the inlet side, which is sometimes undesirable. Therefore, at least three passes or at least two reversals of motion seem to be advantageous, and more passes or reversals of motion can certainly be performed if this is deemed advantageous, with an odd number of passes or an even number of reversals of motion causing the rolled material 10 to move away from the profile roller assembly 20 toward the exit side 34.

[0085] The profile roller assemblies 20 in Figures 5 to 14 also each have a profile roller 21 or an upper roller and lower rollers 22, 23, and needless to say, in different embodiments, the profile roller 21 may be oriented in a different way based on these exemplary embodiments, or a vertical roller may be added to or replaced with the horizontal roller shown in this exemplary embodiment.

[0086] In the profile roller assemblies 20 shown in Figures 5 to 14, multiple profile roller assemblies 20 are arranged front to back along the pass line 30, thereby forming a profile roller tandem 19.

[0087] In this case, each profile roller assembly 20 is spaced apart by a roller spacing 38, which is much smaller than the roller diameter 35 of each profile roller 21 or upper and lower rollers 22, 23 as illustrated in Figure 5. Depending on the specific implementation, the roller spacing 38 can be less than 0.1 times the sum of the roller diameters 35 of adjacent rollers 21, 22, 23 or profile roller assembly 20, or even less than 0.1 times the minimum roller diameter 35 of adjacent rollers 21, 22, 23 or profile roller assembly 20. Thus, the profile roller assemblies 20 of the profile roller tandem 19 according to Figure 14 are positioned as close together front to back as possible along the pass line 30, which means that between each roller only a safety distance remains, based on manufacturing tolerances, at the most unfavorable contact position of these rollers.

[0088] In other words, in the exemplary embodiments shown in Figures 5 to 13, it is not important whether each profile roller assembly 20 of the profile roller tandem 19, indicated by the dashed lines, is located on a common rolling stand 40, or whether two profile roller assemblies 20 located along the pass line 30 are provided with separate rolling stands 40, whereas in Figure 14, the illustration of the exemplary embodiment specifies that the profile roller assemblies 20 of this exemplary embodiment share a rolling stand 40 having a common frame wall 41. Needless to say, in different embodiments, further profile roller assemblies 20 may be provided along the pass line 30, either sharing a common rolling stand 40 or having individual or separate rolling stands 40. In this regard, intermediate forms may be provided in some cases.

[0089] A rolling stand in which at least two, but more, profile roller assemblies 20 are positioned front to back along the pass line 30, and which also share a common frame wall 41, is also called a tandem stand.

[0090] Regarding other embodiments of the assembly shown in Figures 5 to 14, since they are substantially identical, they will also be described together below in terms of method sequence.

[0091] Each assembly shown in Figures 5-14 is assigned one inlet side 33 and one outlet side 34, which are shown as described in the description of the first exemplary embodiment.

[0092] An inlet roll track 48 is provided on the inlet side 33, while the assemblies shown in Figures 5 to 14 have an outlet roll track 49 on the outlet side 34. Needless to say, the aforementioned nomenclature is also valid for the inlet side 33 and the outlet side 34. Furthermore, in different embodiments, one of the roll tracks 48 or 49 may be omitted, or instead, other equipment that allows the rolled material 10 to flow in or out may be provided, such as a robot arm or a transport trolley.

[0093] The assemblies shown in Figures 5 to 14 have position measuring means 51 on both the inlet side 33 and the outlet side 34, which in these exemplary embodiments are formed as light barriers. Depending on the specific implementation, other position measuring means 51 such as microwave sensors, radar sensors, laser sensors, or tactile sensors may also be used at this location, as long as sufficient information about their respective positions can be obtained therefrom.

[0094] The position measuring means 51 or light barrier shown exemplified in the figure are aligned here so that they can measure the presence of the rolled material 10 in the region of the light barrier with high operational reliability, thereby allowing the rolling material end 11 to pass through the barrier light or pass beside the position measuring means 51 to be detected as an interruption of the light beam or an emission of the light beam, respectively.

[0095] In these exemplary embodiments, the position measuring means 51 is connected to a speed determination device 50, which can estimate the speed of the rolled material 10 from the time progression of the signal provided by the position measuring means 51.

[0096] Depending on the specific implementation, the rotational speeds of the rollers on one or both of the roll tracks 48 and 49 can be used cumulatively or alternatively for estimation of the speed. It is also conceivable that the rotational speed of the profile roller 21 can be used cumulatively or alternatively for a corresponding estimation. In particular, for example, to obtain information on the speed of the rolled material 10, it is conceivable to detect the rotational speed of only the last roll on the roll tracks 48 and 49 that faces the profile roller 21.

[0097] Preferably, the information described above, or information from other equipment, is used cumulatively to determine the speed of the rolled material 10 as accurately as possible. In this way, the motion sequence can be controlled as accurately as possible, or open-loop or closed-loop control can be performed, as will be detailed again below.

[0098] Depending on the specific implementation, the position of the position measuring means 51 can be appropriately selected. In particular, the density of individual position measuring means 51 can be increased in the area of ​​the profile roller assembly 20. To enable the measurement technique to determine as accurately as possible the method and time at which the reversal of motion should occur, it may also be advantageous to place the position measuring means 51 just in the area of ​​the roller gap or immediately before it.

[0099] Next, when the rolled material 10 is supplied to the profile roller assembly 20 in the inflow direction 31A, the material is first brought into contact with the passages expanded, as illustrated in Figures 5 and 6, as already detailed above, so that the rolled material 10 can reach between the profile rollers 21 with as little damage as possible.

[0100] As shown in Figure 6, for example, when the incoming rolled material end 11 reaches the position measuring means 51 in the region of the profile roller assembly 20 that follows it in the inflow direction 31A, the profile roller 21 comes into contact in the contact direction as shown in Figure 6.

[0101] As illustrated in Figures 7 and 8, the roller is then accelerated in the rotational direction 37, initiating the rolling process, thereby rolling the rolled material 10 in the rolling direction 31.

[0102] Depending on the specific method implemented, the transition between processes may also occur as shown in Figures 5 to 7, with the first profile roller assembly 20 contacting the rolled material 10 before it reaches the positions shown in Figures 6 and 7. It is also possible that the rollers are already rotating before contacting the rolled material 10.

[0103] When the rolled end 11 opposite to the rolling direction 31 (see Figure 8) reaches the first profile roller assembly 20 in the rolling direction 31 (see Figure 8), the direction of motion is reversed as illustrated in the transition between Figures 8, 9, and 10.

[0104] At the point shown in Figure 9, the profile roller 21 or the upper roller 22 and lower roller 23 further contact in the contact direction 36 for the return pass, and correspondingly the roller gap for the return pass becomes smaller. Next, the rolling direction 31 is reversed by the rotation direction 37 being reversed accordingly, as illustrated by comparing the rotation direction 37 in Figures 8 and 10.

[0105] Even with this reversal of the direction of motion, the transition to individual processes may occur relatively abruptly, as at the start of the rolling process. On the other hand, this transition can also be carried out smoothly, taking into account the fact that, as illustrated in Figure 8, if the rolled material 11 has not yet fully reached the first profile roller assembly 20 in the rolling direction 31, the roller gap of the first profile roller assembly 20 has already been slightly reduced, and this last part of the rolled material 10 will not reach the second profile roller assembly 20 before the reversal of the direction of motion occurs.

[0106] Needless to say, in this regard, if it is deemed process-technically significant, it may also provide a smooth transition between the extreme possibilities described above. In particular, for example, it is conceivable that the rolled material 10 is rolled along the pass line 30 toward the second profile roller assembly 20 beyond the arrangement shown in Figure 9, thereby losing contact with the first profile roller assembly 20 before the change in direction of motion occurs. In such a case, to avoid damage, for example, the path of the first profile roller assembly 20 that is no longer in contact with the rolled material 10 can be extended until the rolled material reaches the profile roller assembly 20 whose path has been extended after the reversal of the direction of motion 17, and then the rollers 21, 22, and 23 of this profile roller assembly 20 can be brought into contact again.

[0107] The arrangements in Figures 11 and 12 are merely mirror images with respect to motion and are substantially identical to the arrangements in Figures 9 and 10, which illustrate a second reversal of the direction of motion in the rolling direction 31. Needless to say, a corresponding reversal of the direction of motion can be made as needed until the rolled material 10 has finished rolling and moves from the arrangements shown in Figures 5 to 14 to the outflow direction 31B, as illustrated in Figure 13 with respect to the exit roll trajectory 49. As already mentioned, the latter can also be made toward the inlet side 33 if it is deemed meaningful based on the number of passes. [Explanation of Symbols]

[0108] 10 Rolled material 11 End of rolled material 19 Profile Roller Tandem 20 Profile Roller Assembly 21 Profile Roller 22 Upper Roller 23 Lower roller 30 Pass Line 31 Rolling direction 31A Inflow direction 31B Outflow direction 32 deformation processing zones 33 Entrance side 34 Exit side 35 Roller diameter 36 Contact direction of profile roller 21 37 Rotation direction of profile roller 21 38 Roller spacing 40 Rolling Stand 41 Frame Wall 48 Inlet Roll Trajectory 49 Exit roll trajectory 50 Speed ​​determining device 51 Position measuring means

Claims

1. A reversible profile rolling method using at least one profile roller assembly (20) consisting of profile rollers (21) that form a roller gap and deform the rolled material (10), In a reversible profile rolling method, the rolled material (10) passes through the profile roller (21) in a first pass in a first rolling direction (31) and is deformed thereafter, the rolling direction (31) is reversed, and the rolled material (10) passes through the profile roller (21) in a second pass in a second rolling direction (31) opposite to the first rolling direction (31) and is deformed thereafter, (i) First, the rolled material (10) is passed through the passage by expanding the passage between the profile rollers (21), and only then are the profile rollers (21) brought into contact with the rolled material (10) for deformation processing, and / or (ii) Keep the rolled material (10) in contact with at least one of the profile rollers (21) during the reversal, and / or (iii) During the deformation process, change the rolling speed of the rolled material. A reversible profile rolling method characterized by the following features.

2. The profile rolling method according to claim 1, characterized in that the passage is expanded so that the rolled material (10) does not come into contact with at least one of the profile rollers (21), preferably all of the profile rollers (21) of the profile roller assembly (20), or all of the profile rollers (21), in order to expand the passage and pass the rolled material (10) between the two profile rollers (21).

3. The profile rolling method according to claim 1 or 2, characterized in that the rolled material (10) is kept in contact with all of the profile rollers (21), preferably all of the profile rollers (21), of the profile roller assembly (20) during reversal.

4. The profile rolling method according to any one of claims 1 to 3, characterized in that the rolling speed is controlled during the deformation process, preferably according to the position of the rolled material (10) relative to the profile roller assembly (20).

5. The profile rolling method according to any one of claims 1 to 4, characterized in that the rolling speed is reduced before reversal and increased after reversal.

6. The profile rolling method according to claim 5, characterized in that the rolled material (10) remains in contact with at least one of the profile rollers (21) during the reversal of the direction of motion.

7. The profile rolling method according to claim 5 or 6, characterized in that the rolled material (10) is deformed during or immediately after the reversal of the direction of motion.

8. The profile rolling method according to any one of claims 1 to 7, characterized in that the passage is changed during deformation processing, preferably according to the position of the rolled material (10) relative to the profile roller assembly (20), and preferably reduced or increased.

9. A profile rolling method according to any one of claims 1 to 8, characterized in that the rolling speed of the rolled material (10) is determined during the deformation process, preferably calculated from the rotational speed of the profile roller (21), and the calculation result is compared with one or more positions of the rolled material end (11) at a predetermined time.

10. A profile rolling method according to any one of claims 1 to 9, characterized by an odd number of passes.

11. At least two profile roller assemblies (20), each consisting of a profile roller (21) that forms a roller gap, are arranged along the pass line (30). First, the rolled material (10) is passed through a passage that expands the path between the profile rollers (21) of both, preferably all, profile roller assemblies (20), and only then are the profile rollers (21) brought into contact with the rolled material (10) for deformation, and / or The rolled material (10) remains in contact with at least one of the profile rollers (21) of both, preferably all, of the profile roller assemblies (20) during reversal. A profile rolling method according to any one of claims 1 to 10.

12. A profile roller assembly (20) comprising a profile roller (21) having an inlet side (33) and an outlet side (34) that forms a roller gap and is arranged along a pass line (30), A profile roller assembly (20) comprising a speed determination device (50) for determining the rolling speed of a rolled material (10) and / or a position measuring means (51) for measuring the position of the rolled material end (11) of the rolled material (10) during deformation processing.

13. The profile roller assembly (20) according to claim 12, characterized in that the speed determination device (50) includes the position measuring means (51).

14. A profile roller tandem (19) comprising at least two profile roller assemblies (20) according to claim 12 or 13, each forming a roller gap and arranged along a pass line (30).

15. A profile roller tandem (19) comprising at least two profile roller assemblies (20) each consisting of a profile roller (21) that forms a roller gap and is arranged along a pass line (30), (i) The rolled material guides on the inlet side of the profile roller assembly (20), between the profile roller assemblies (20), and / or on the outlet side of the profile roller assembly (20) are omitted, and / or (ii) Each of the two profile roller assemblies (20) is assigned a maximum roller diameter (35), and the two profile roller assemblies (20) are spaced (38) apart from each other by less than half of the larger of the two maximum roller diameters (35), A profile roller tandem (19) characterized by the following.

16. The profile roller tandem (19) according to claim 15, characterized in that the two profile roller assemblies (20) each have a maximum roller diameter (35) and are spaced (38) apart from each other by less than half of the larger of the two maximum roller diameters (35).

17. The profile roller tandem (19) according to claim 15 or 16, characterized in that the two profile roller assemblies (20) are spaced apart from each other by less than one-quarter of the sum of the two maximum roller diameters (35), preferably less than 0.1 times the sum.

18. The profile roller tandem (19) according to any one of claims 14 to 17, characterized in that the two profile roller assemblies (20) have a common rolling stand (40), preferably arranged on a common tandem stand, particularly on a common tandem stand frame.

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