DE19938966C1 - Profiled band material manufacturing method uses rolling of metal band in successive steps for providing required periodic profile under control of electronic control device - Google Patents

Abstract

The manufacturing method has a metal band (16) passed through a rolling nip defined between 2 rollers (11,12), for rolling the metal band in 2 or more steps, with retraction of the metal band after rolling a first section of the metal band before rolling the same section a second time. The rolled metal band is retracted by a length which is shorter than the periphery of the rollers. An electronic control device can be used for controlling the rotation of the rollers and the retraction and feeding of the metal band, in dependence on the required profile. An Independent claim for application of a rolling device for manufacture of a profiled band material is also included.

Description

The invention relates to a method with the preamble of claim 1 specified features.

Such a method is known from DE 195 04 711 C2 knows. It works by repeatedly rolling a metal strip, which is why it was done from the beginning A rolling stand continuously runs through to the end, the direction of its work then changes is swept, so that the metal strip the roll stand after full one more time Length runs through, but now in the opposite direction.

From DE-PS 104 875 it is known to produce tubes in strips or ta to roll a profile-shaped work piece in a single step. A similar ver driving discloses DE 197 04 300 A1 for producing profiled boards, named of body panels.

DE-PS 638 195 describes a pilgrim step process for producing thin strips known a thick starting workpiece. With this procedure the output The workpiece is gradually deformed with a high degree of deformation and thereby against the usual rolling direction pushed through the roll gap.

From US 1,106,172 it is known to arrange three in a row orderly rolling mill stands to continuously roll profiles into a strip.

Coins and medals for collectors are more valuable the higher their surface quality is. Proofs are used to mint coins and medals blanks and medal blanks, which already have a high-gloss surface. Proofs are punched out of a strip-like material. To make the band-shaped material is assumed to be a material that is a few milli meters, e.g. B. is 10 mm thick. This material becomes a band in several roll passes from Z. B. 0.5 mm to 2 mm thick. Such a tape, the thickness of the thickness of the coins to be minted  and medals is determined, is the primary material from which the proofs ge to be punched. It is state of the art, before the last roll pass the two Exchange rollers for a pair of rollers, the surface of which is mirror-high has shine. The mirror high gloss can be created by lapping.

With each roll revolution, the surface quality of the two rolls decreases, Because of the rolling process, there is a metal abrasion, which the roller top contaminated surfaces. It is only during the first rotation of the rollers The surface is still shiny. Then the surface quality of deteriorates Turn after turn and with it the surface quality deteriorates of the rolled stock. After passing a belt length of approx. 100 up to 1,000 coin diameters, the rollers are usually removed and brought back to mirror gloss by lapping. Despite this elaborate Approach you get no proofs with constant, high Surface finish.

The present invention has for its object to show a way like a ribbon-shaped primary material with a uniformly high surface quality can be produced economically.

This object is achieved by a method with the specified in claim 1 NEN features and by a device with the specified in claim 63 characteristics. Advantageous developments of the invention are the subject of Subclaims.

According to the metal strip in successive sections, wel che shorter than the circumference of the two rollers, each between the same two rolls rolled in two or more than two rolling steps, including the metal between two consecutive rolling steps then the retrieved section of the metal strip is rolled again.  

Retrieving the metal strip enables the last rolling step in each of the retrieved sections of the metal strip between sol Chen circumferential sections of the two rollers, which takes place in one or the several previous rolling steps have not yet been applied to the relevant one Have acted section of the metal strip, so that the last rolling step between Circumferential sections of the two rollers, which is the best yet have existing surface quality, whereas the previous rolling steps can take place between peripheral sections of the two rollers, which have already carried out a large number of rolling steps and in ih surface quality are worse. The surface finish of the he finally The band-shaped primary material is produced by the surface quality of those Circumferential sections of the two rollers determined, which in the Ab considered cut the metal strip to perform the last rolling step.

With a discontinuous multi-step rolling process according to the invention, it is possible to produce the strip-like primary material with a particularly high and uniform surface quality or to produce a primary material with the quality known from the prior art in a greater length than before without changing the rollers. Thickness tolerances of ± 1 µm, repeat accuracy of ± 2 µm, roughness depths of only R _t = 0.18 µm and center roughness values (Center Line Average, CLA) of only R _a = 0.022 µm have already been achieved (DIN 4762).

In order to use the method according to the invention at least two rolling steps in egg nem section of the metal strip, the scope of the Rolls to be at least twice the length of the retrieved Sections, where the retrieved section should be slightly larger than that Diameter of the proofs to be punched out, so that the unavoidable punching tab case can be taken into account. If the metal band, as in the patent Claim 2 provided, not only in one direction, but sometimes in one Direction and times rolled in the other direction, then you can z. B.  also proceed in such a way that the metal strip is between the same Ab a few times cut the two rolls back and forth and the last rolling step between two circumferential sections of the rollers, which until then for a smaller number of rolling steps were used and therefore still ne have better surface quality, so that they the metal in the last rolling step tied a surface with also optimal quality.

Are the sections of the metal strip sometimes in one direction and sometimes in rolled the other way, you also get a cheaper work structure of the fabric, as if you only ever rolled the metal band in the same direction would. This is all the more important the stronger the rolling induced decrease in the thickness of the metal strip is because it also the material displacement caused by the rollers becomes stronger. Another advantage lies in that the favorable influence on the material structure in sections reciprocating rollers is cheaper than if, as in the prior art nik a full length metal tape alternately in one and the other Direction is rolled.

Preferably, the roller diameter is chosen so that from part of the Material, the length of which corresponds to the circumference of the rollers, is little at least ten, preferably at least fifteen, proofs are punched out can.

Repeatedly rolling the relevant section of the metal bandes is preferably carried out so that from the surface sections of the two rollers, which on the relevant section of the metal strip act in the first rolling step on the relevant section of the metal strip of the surface sections of the two rollers acting the greatest number and in the last rolling step on the relevant section of the metal strip acting sections of the rollers from the smallest number of rolling steps have led, the surface quality is naturally best when the  section of the rollers acting in the last rolling step for the first time Performs rolling step, so still shows ideal mirror high gloss.

Because a discontinuous multi-step rolling process is carried out and the surface section of the rollers acting in the last rolling step has the highest surface quality, in the previous rolling steps the surface surface of the primary material has already been optimally prepared, Exercise of the discontinuous multi-step rolling process according to the invention A longer length of stock is created before the rolls are removed and have to be brought back to mirror gloss by lapping.

The method according to the invention also works more economically than that Known methods of producing proofs.

The number of rolling steps with which on one and the same section of the Metal tape is knitted on the desired stitch decrease and upper surface quality of the primary material to be produced.

A roll stand is suitable for carrying out the method according to the invention with a first reel arranged on the inlet side of the roll gap for the metal strip to be rolled and with one on the outlet side of the roll gap arranged second reel for winding the strip-like primary material, a for the reel provided on the inlet side of the roll gap Drive motor is provided, which is a return of the metal strip in steps Allows a predeterminable length, in particular a servo motor. The length the steps by which the metal strip is retrieved can be carried out by a electronic drive control, in particular program-controlled, the Erfor be adapted. Such program control can also discontinuous drive of the rollers with forward turning, standstill and ge if necessary with reverse turning optimally to the individual rolling task be fit.  

A great advantage of the invention is that it applies to other applications gene can be transferred. One application relates to the production of grooved strips other. Such tapes are e.g. B. needed to cut slats for electric motors, especially for servomotors. Servo motors are getting faster and more accurate. That places increasing demands the dimensional accuracy of the spiral helix blades in these motors. The dimensionally accurate The width of the groove should be better than 1/10 mm. If you have one If you want to roll the groove in a metal strip, several rolling passes are required.

By step-by-step and section-wise rolling according to the invention generally profiled tapes both with high dimensional accuracy and with high Roll surface quality, especially if the multi-step rolling move the metal strip  not just rolled in one direction and retrieved in the opposite direction, son which is rolled in both directions, also when retrieving.

The accuracy and surface quality that can be achieved are great ßer than when milling, larger than when the metal band as in the state of the Technology is repeatedly rolled to full length, which is because of the occurrence the uneven elongation only up to a decrease in thickness of at most 10% is possible.

It is possible to roll a profile into the strip from above and below. In the In this case, both rollers are profiled. The dimensional accuracy and the surfaces The shorter the rolling steps, the better the quality. With advantage Rolling steps chosen shorter than half the circumference of the rolls. In this case, he the profile extends only over part of the circumference of the roller. The lead bend part of the outer surface of the roller can be cylindrical; the makes it possible with the cylindrical section of the roll surface ever portion of the metal strip in a first rolling step profiling, but equalizing, in order to ensure the dimensional accuracy of the rolled part to increase the volume.  

An advantageous application of the invention is the production of a band-shaped material made of metal, which is not in continuous, but in regular Frequently recurring sections is profiled. Such an application, for which the invention has been implemented relates to nibs for Fountain pen.

Nibs for fountain pens have a different length Thickness. Nibs are typically 0.2 mm thick in the rear area. Towards the top the nib becomes thicker so that a maximum of about To reach 0.6 mm. It is known to produce nibs by using a me tallband by rolling in sections, namely in steps, the length of which Corresponds to the length of the later nibs, first with a match the longitudinal profile is provided. This profiled metal band is a primary material, from which the nibs are later punched out and into the desired shape be shaped.

In order to produce the profiled primary material, it is known to roll two of two gap-limiting rolls, which are stored in a roll stand, the above to provide the roller with an empirically determined contour in the circumferential direction, which complement the intended course of the thickness of the nibs is voted. Outside of this coordinated contour, the outer surface of the upper roller so small a distance from its axis that in this loading does not come into engagement with the metal strip in the roll gap. With the The beginning of the circumferential section having the coordinated contour sticks Roll into the metal strip and then take it for the duration of one rolling step tes, namely as long as it is in engagement with the metal strip, with and effects thereby both a feed and a profiling of the metal strip. The metal strip is unwound from a first reel and that from the Profiled metal strip emerging from the roll gap is rolled up by a second reel. Since the feed of the metal strip is effected by the two rollers, it results  between them and the second winding reel inevitably one certain lot length of the metal band, which makes it necessary a band loop with a tape tensioner to provide compensation creates between the discontinuous belt feed through the rollers and the continuous winding movement of the second reel. That is with some associated equipment expense, which is disadvantageous.

Since the top roller is about 3 mm in front of the plane, which is the longitudinal axis of the interspersed with the rollers, piercing the metal strip to be rolled, it is also be knows the metal strip before inserting the upper roller using a Roll rotation synchronized pliers each time before inserting the top pull the roller back by 1 to 2 mm so that when the Nibs to keep the waste as small as possible.

Nibs produced in the known manner have undesirable thicknesses fluctuations. On the one hand, this is due to the fact that the metal strip, from which one starts to manufacture the primary material, with a thick swan is affected, which is increasingly in the pre-profiled by rolling Continue material, especially with large stitch decreases, whereby is that large stitch decreases difficult to achieve with hard metal strips Chen are. Given one necessary for making nibs Stitch decrease of 60% to 70% the specialist here faces a difficult problem. The thickness fluctuations that are already in the starting material al are typically ± 0.02 mm. There will be further fluctuations in thickness caused by the fact that in the known manner of producing the The rollers continuously umlau at a constant speed fen, which pierces the profiled roller and thus the belt feed abruptly start and be stopped again. An even train force in the metal strip during profiling, which ensures an even ar would be cheap, is not possible with the known method of working.  

The present invention also shows a way such as a profiled band-shaped Ges material z. B. for nibs with greater accuracy, namely with we deviations of the actual course of the thickness from the target course of the Thickness can be made.

This is made possible by a method which further develops the invention features specified in claim 13 and by a device with the features specified in claim 42.

According to the invention, the metal strip is rolled in two or more than two steps rolled to the depth of the desired profile of the primary material, so that the total deformation not only by one, but by two or more stitch acceptance is achieved. For this purpose, the Me tallband but not several consecutively arranged rolling stands fen; that would be far too expensive and would increase the accuracy of the longitudinal position tion of the metal strip in the roll gap, which is required to make multiple roll cuts not perform in one and the same section of the metal strip or allow difficult. Rather, the metal strip is between two the following rolling steps and then the retrieved section of the metal strip is rolled again between the same two rollers. Only when in a section of the metal strip to be profiled in several rolling steps rolled the desired profile with return steps between them has been, the metal strip for profiling the next section of tape in promoted the roll gap.

However, it would also be possible, after a first rolling step, in a first Band section if necessary after restoring the initial position of the Rolling z. B. by turning back the rollers a same first rolling step in a subsequent band section, then the band by two Retrieve steps, then the second rolling step in the first strip section and then perform the second rolling step in the second strip section.  

The development of the invention dealing with profiled primary material has significant advantages:

• - Because the profile of the metal strip is not in one but in two or If several rolling steps are generated, greater dimensional accuracy is achieved than before, what happened with nibs especially in the later shaft has a rich impact.
• - Since the desired profile in a section of the metal strip is not by egg is produced by one or two or more rolling steps, harder metal strips can also be profiled, even spring-hard strips.
• - This opens up the invention to applications beyond the nib area go out and captured a variety of profiled parts that from one band-shaped semi-finished product and separated by punching the band can be. Application examples are electrical conductor structures such as e.g. B. contact springs, helix blades for electric motors, also lead frames and chain links for watch straps and for jewelry chains.
• - The possibility of profiling in several rolling steps very diverse profiles can be created. It’s even possible the profile not only from one side, preferably from above, into the me roller, but also from both sides. Both can do this Rollers that limit the roll gap with a corresponding section as non-cylindrical contour and / or one of the rollers shifted to change the height of the nip during rolling become.
• - The versatility of the invention contributes to the fact that the metal band is not in everyone Rolling step must be profiled, but also in a first rolling step can only be reduced in thickness, for which the two rollers each then also have a cylindrical section if they are not zy anyway are lindric. If the metal strip is only profiled from one side, then it has the other roller always has a completely cylindrical surface.  
• - The progress that the invention brings is made by minimal apparatus Effort reached. Starting from a rolling stand known per se, in to modify the working method for profiling. Is one of the two rollers, as known per se in the manufacture of nibs, in Profiled circumferential direction, then it is so designed for purposes of the invention tet that they are successively circumferential sections with under has a different contour, which is particularly the result of cutouts who are separate and in connection with the intended retrieval of the Metal strip a repeated rolling of the same section of the Me Allow tallbandes. If the metal strip is profiled on both sides, he is desired, the opposite roller is profiled so that it also successively in the circumferential direction sections with differ cher contour.
• - But it is also possible to form both rolls cylindrical and to achieve the required change in the height of the roll gap during rolling in that one of the two rolls, preferably the above re, is shifted in the roll stand. That can e.g. B. happen with an electric motor, which drives two spindles, which act on the roller to be relocated and coupled with a repeatable setting enabling incremental rotary encoder, with the help of which the electric motor is controlled. It is also possible to move the upper roller hydraulically by using two short - the stroke is z. B. 50 mm - hydraulic cylinders on ei ne cross member of the roll stand and acts on the cross member on the roller to be relocated. The piston rods of the two hydraulic cylinders are connected with in incremental position sensors, which in turn are part of a control circuit that regulates the position of the piston rods to a predetermined value or to a predetermined curve profile - depending on the profile to be rolled. Compared to the use of an electronic servo drive, a hydraulic servo drive has the advantage of being faster and more precise.
  With such a servo drive for moving one roller (the other roller serves as an abutment), it is possible to roll a profile into the metal strip in one or more steps even with cylindrical rollers. It depends on the desired profiling how the roller is to be moved depending on the belt feed. A corresponding control curve derived from the profile to be rolled for the drive which is intended to displace the roller can be stored as a control curve in a programmable electronic control device. By storing several control cams, a corresponding number of different profiling tasks in metal strips can be mastered according to the invention with a roll stand without exchanging rolls.
  If only one roller is moved during rolling, this is preferably the upper roller. Preferably, the upper or lower roller is optionally shiftable during rolling in order to be able to roll a profile into the metal strip both from above and from below. Then the other roller serves as an abutment and maintains its position.
  It is also possible to apply the displacement of a roller during rolling to a roll stand that has a profiled roller. Such a combination of two different possibilities to change the height of the roll gap during the course of the rolling, namely by using a profiled roll in combination with the displacement of a roll, can further increase the versatility of the roll stand for producing strips which are profiled in sections .
  If working with two cylindrical rollers, it is advantageous to provide one of the rollers, in particular the upper roller, with an axially parallel cut in order to obtain a reference for the rotational angle position of the roller.
• - The first reel comes from which to retrieve the metal strip the metal strip to be profiled is of particular importance too because it's the length of the crotch by which the metal strap is retrieved will be able to reproduce with sufficient accuracy. For this you provide this Reel preferably with a servo motor, which has an incremental  Encoder has an exact definition of the desired step length ge when unwinding and also when winding.

The width of the metal strip can be dimensioned such that each of them is aligned otherwise arranged band sections a single profiled part, for. B. egg ne single profiled nib can be punched out. The economical speed of the process and a rolling stand operating according to the process can easily be multiplied, however, if wider tapes are processed, which are so wide that from each profiled section of the primary material two or profiled more than two adjacent nibs or the like Objects can be formed. The adjacent profiled Sections for these items can be in the metal band with or without an egg NEN offset can be arranged in the longitudinal direction of the metal strip. Has an offset an increase in the stride length by which the metal band in each case is brought back.

A particularly advantageous development of the invention is the subject of the To Proverbs 17

According to this development of the invention, the metal strip is rolled before equalized the profile. Leveling is a rolling of the me tallbandes in a roll stand with highly constant roll gap, whereby the Dic fluctuations in the metal strip can be reduced. Roll stands for Egali Sieren are known from DE 25 41 402 C2, whereupon for further details ten is referred. In a known leveling roll stand, a highly con Constant roll gap is achieved in that on the roll neck bearings from outwardly elongated roll journals perpendicular to the roll axes biasing forces directed away from the rolling stock are exerted, which are perpendicular can be aligned and preferably in one around the rolling angle of the Deviating from the roll axis plane, passing through the incoming metal strip  Line of action. This way the working cycle of the rollers in the Rolling pin bearings reduced.

However, the invention does not provide for the profiling of the metal bandes provided roll stand another, the leveling serving To put the mill stand in front. Rather, leveling and profiling carried out in one and the same rolling stand, which is why the metal strip is not only in the profiling steps in the feed direction by the Roll gap is moved. Rather, the metal strip is first made in steps that are at least as long as the profiling step, with a moderate decrease equalized its thickness. After that, the tape is taken one step at least the length required for profiling and at most that for leveling pushed back length and afterwards is in the retrieved ab cut the metal strip rolled the profile. In a roll stand in which the the first roller is cylindrical and the second roller is profiled and a circumference cut with the contour, which on the desired course of the thickness z. B. egg Ned pen is tuned, which are made from the metal band for this purpose, the second roller also has a cylindrical one Circumferential section, which of the contoured circumferential section is separated (claim 24). With the cylindrical peripheral section the Ega carried out. The cylindrical peripheral portion is with regard to its determination and taking into account those occurring during rolling Elongation of the metal strip chosen so long that the leveled section of the Metal tape has at least the length of the nib, preferably something is longer, so that the beginning and / or the end of the profiling step an Ab stood from the beginning and end of the equalized section.

According to the invention, the roll stand used for profiling is therefore simultaneously trained as a roll stand for leveling and with one step forward equipped reverse and reverse tape feed.  

The development of the invention according to claim 19 and according to claim 24 has significant advantages:

• - The thickness fluctuations of ± 20 µm in the primary material and thus also in the Later nibs can be less than ± 2 µm in a single Pen can be reduced, especially in the later shaft area of the Nibs. With a delivered device, nibs could Thickness fluctuations of ± 1 µm can be produced.
• - The reproducibility of the course of the thickness from pen to pen it initially reached ± 4 µm. With the delivered device was like that reproducibility of ± 2 µm even achieved.
• - These are accuracies in the manufacture of quills by whale zen have not been achieved so far. Corresponding accuracies are also at ribbon-shaped primary material for profiled products other than nibs reachable.
• - The great advance in accuracy is due to minimal equipment wall reached. Starting from a rolling stand known per se, the sem to modify the profiling work roll by using a suitable cylindrical section, and it is the whale preload the two rollers to reduce the bearing play NEN, e.g. B. in one of the ways disclosed in DE-25 41 402 C2. According to the DE 25 41 402 C2, the roll neck of the two rolls are not immediate bar prestressed, but indirectly by prestressing the roll neck of Back-up rolls, which are the two rolls (also called work rolls) preload. However, it is also possible to directly remove the two (work) rolls preload bar. You also need funds that are not just gradual This advance, but also a gradual return of the metal ban allow in steps that are about as long as the steps in the Ega lize. As already mentioned, this can be done simply by: at least the first reel from which the metal strip to be profiled starts is wound, provided with an electric motor, which with sufficient  Control accuracy in increments of the desired length and in rotation can change direction. This is preferably done with a servo motor, which has an incremental rotary encoder, the precise definition the desired step length when unwinding and rewinding. On Servo motor is usually connected to a subordinate gear. When servomotors are mentioned below, it is assumed that they are usually also connected to a downstream transmission.

The second reel, which holds the profiled metal strip, is also preferred winds, provided with such a servo motor.

• - This has the further advantage that the interaction of the Servomoto in all phases, not only when leveling, but also when profiling and when retrieving the metal strip exerted a defined train on this can be, which the achievement of a uniform primary material with ge wrestle thickness fluctuations favored. This move should remain as constant as possible be and not fall below a certain basic tractive force, which Manufacture of nibs such. B. can be 500 N. When retrieving Therefore, the first reel pulls the metal band against the with greater force smaller reel force of the second reel. By maintaining one basic tensile force in the metal strip in all phases of the Machining the metal strip results in improved uniformity of the rolled stock and avoiding the occurrence of a band ver running, d. that is, the metal band does not warp.
• - Another advantage of driving the reels with servo motors is that that the belt feed and the drive of the two rollers so well on each other can be coordinated that instead of the prior art instead a continuous drive of the rolls a discontinuous rolls drive can take place. In particular, the speed at which the A Stitch the profiled roller into the metal belt on the belt feeds speed should be adjusted so that there are no abrupt  Acceleration of the metal strip takes place. In particular, grooving the profiled roller in the metal belt, first with a slow belt thrust and with slow roll rotation, followed by a be accelerated belt feed movement and roll rotation. This is for that Achieving low thickness tolerances is particularly advantageous.
• - Another advantage of using servo motors to drive the has peln is that special tape tensioners, as in the state the technology are required are not required.
• - Another advantage of using the servo motors to drive the has peln is that the tape feed by a programmable elek tronic control unit very precisely to the length and position of the profiled Belt sections and can be matched to the roll rotation preferably also on the vertical displacement of a roller, in particular in one by two cylindrical roller shells or roller shell section te limited nip to change its height and thereby a be agreed to generate profiling.

The retrieval of the metal strip cannot only be done by one on the inlet side of the roll gap arranged reel happen, but also by an as Plier feed device designed return device. This execution tion form of the invention is particularly suitable for editing shorter or stiffer belts, in particular for the production of a pre-material for proofs. If the return device is a tongs feed device, it can be moved over it Be used to advance the metal strip and the roll gap feed.

Instead of a reel arranged on the outlet side of the roll gap, as a pulling device for the strip emerging from the roll gap during rolling a tong feed device can also be used. This too leadership is particularly suitable for machining shorter or stiffer Tapes.  

The quality of the band-shaped primary material produced is increased, if so probably when rolling as well as when retrieving the strip in a defined one Train is maintained, this favorable influence occurs the stronger, the the metal band is thinner. But also with thicker tapes, such as z. B. for the Proofs are used, it is advantageous to keep the tape during of rolling and retrieval between the retriever and the pull device by coordinated movement of these two devices to keep the voltage under tension and to guide it precisely.

The optimal preload with which the bearing play of the rollers is clamped away can be empirically determined for the respective application and then remains constant for the application. The optimization is preferably done se so that the elongation of the rolling mill occurring in the respective application This is determined when leveling and by appropriately adjusting the preload is compensated.

The leveling of the metal band can not only be done if a professional lated primary material is produced, but also when producing a non-pro filleted primary material, such as z. B. is used for proofs. In this case the two rollers are cylindrical anyway and can be in any position to the Egali be used if the rolling stand allows you to level it has clearing through which the influence of the play of the roll neck is reduced in their positions.

Further features and advantages of the invention emerge from the attached schematic drawings showing embodiments of the invention.

Fig. 1 shows a partially sectioned side view of a machine accelerator as the invention,

Fig. 2 shows a partially sectioned front view of the machine,

FIG. 3 shows an enlarged section of the machine compared to FIG. 1, namely the main part of the roll stand of the machine,

FIG. 4 shows an enlarged section of the machine compared to FIG. 2, namely the roll stand

Fig. 5-10 show a flowchart of a first working method executable with the machine

Fig. 11-16 show a flowchart of a second with the machine cash Execute method of operation, the

Fig. 17 shows a schematic diagram for carrying out the invention with two cylindrical rollers, the

Fig. 18 shows for explaining a method for producing a material for proofs before two divided into six circumferential sections, and the

FIG. 19 shows a modified machine according to the invention in a representation corresponding to FIG. 1.

Corresponding parts are in the examples with matching Be train numbers referred.

The machine shown in Fig. 1 and Fig. 2 has a foundation 1 , on which chem a roll stand 2 is built in the middle, in front of and behind which chem a receiving device 3 and 4 for a reel 5 and 6 is attached, which can be driven by an electric servomotor designed drive motor 7 , 8 .

In lateral mounting parts 9 and 9 a of the roll stand, two work rolls 11 and 12 , hereinafter simply referred to as rolls, are mounted, which together limit a roll gap 13 . Above the upper roller 12 and below half of the lower roller 11 , a support roller 14 and 15 of larger diameter is installed in built-in parts 10 and 10 a. The built-in parts 9 , 9 a of the Ar beitswalzen 11 and 12 are each arranged in a section of the built-in parts 10 , 10 a of the support rollers 14 , 15 . In the lower mounting part 9 are two short hydraulic cylinders 46, 47 which on the upper mounting portion 9 a einwir ken and serve occurring during rolling bending of the work rolls 11 to compensate 12th

A metal strip 16 to be processed runs from the reel 5 via an overflow roller 17 into the nip 13 , passes through it and passes via a further overflow roller 18 to the second reel 6 , which winds up the metal strip 16 processed in the roller 2 . Between the nip 13 and the second guide roll 18 or a device 19 is provided for the suction of rolling oil in which the metal strip 16 is cleaned by the rolling oil.

The structure of the roll stand 2 is shown in more detail in FIGS . 3 and 4 Darge. It follows from this that the two rollers 11 and 12 , the diameter of which is only approximately 1/3 of the diameter of the support rollers 14 and 15 , are mounted with their roller journals 20 and 21 in roller journal bearings 22 , which are designed as roller bearings. A roll neck 21 of each of the two roll zen 11 and 12 is extended beyond its roll neck bearing 22 and formed as part of a gimbal 23 , which enables the drive of the two rolls 11 and 12 each by means of a cardan shaft 24 . An electric motor 41 driving the two rollers 11 and 12 synchronously via the cardan shafts 24 is shown in FIG. 2. It drives the rollers 11 and 12 via a gear 48 which is branching. However, it is also possible to drive the rollers 11 and 12 by two separate motors, as will be discussed with reference to FIG. 17.

The support rollers 14 and 15 have roller journals 25 , which are in roller bearing journals 26 formed as roller bearings of the lateral installation parts 10 and 10 a. The roller journals 25 are extended beyond the roller journal bearings 26 and are inserted into bearing shells 27 , of which the bearing shells of the lower support roller 14 are clamped to the foundation 1 , while the bearing shells 27 of the upper support roller 15 are clamped ver with a cross member 28 arranged above them. The bracing is done with a threaded rod 29 extending from the bearing shell 27 , on which a set of disk springs 30 is arranged, which is tensioned by a nut 31 . This is only shown above the crossbeam 28 , but is provided on the foundation 1 in the same way. This preload reduces the bearing play of the support rollers 14 and 15 and thus its influence on the deviations in the thickness of the rolled metal strip from its target thickness. The rollers 11 and 12 as well as the support rollers 14 and 15 thus achieve a concentricity of ± 1 μm.

The required preload of the roll stand 2 is generated with the help of two spindles 32 and 33 , which press from above onto the cross member 28 and onto the bearing shells 27 and each have its own electric stand 34 arranged on top of the roll stand 2 ( see Fig. 1) are driven. For this purpose, both electric motors 34 have a drive shaft 49 designed as a pinion, the teeth of which each mesh with a gear 50 . The two gear wheels 50 are fixed in a rotationally fixed manner on one spindle 32 and on the other spindle 33 . The suitable preload of the roll stand is determined empirically from the elongation of the roll stand in the respective application and set so that the elongation is compensated for. After this presetting, the machine according to the invention operates as follows:

The metal strip 16 to be machined is unrolled from the first reel 5 , passed through the nip 13 , pulled up to the second reel 6 and fastened to the water.

The first, lower roller 11 has a cylindrical lateral surface 11 . The second, upper roller 12 has a lateral surface ( Fig. 5) with a profiled circumferential portion 35 , which has a length L1 measured in the circumferential direction of the roller 12 , and a cylindrical circumferential portion 36 , which has a length L2 measured in the circumferential direction of the roller 12 , both separated by two cutouts 37 and 38 . The cylindrical peripheral portion 36 of the jacket surface has the greatest distance from the axis of the second roller 12 , the recesses 37 and 38 have the smallest distance from the axis of the two th roller 12th The profiled peripheral portion 35 of the lateral surface has a con ture, the course of which is matched in the circumferential direction to the longitudinal course of the thickness of the nib, which is finally made from the metal strip 16 , who is to.

In FIGS. 5 through 16, the first lower roller 11, which is cylindrical, shown only partially.

The processing of the metal strip 16 begins with the fact that in the metal strip stretched between the two reels 5 and 6, the cylindrical circumferential section 36 sticks the second roller 12 , at a slower speed, adapted to the peripheral speed of the cylindrical circumferential section 36, before the feed speed of the metal strip 16 . This puncturing phase is shown in FIG. 5, but not to scale, but with an excessively thick metal band 16 . In the further course of FIGS. 6 to 16, the Stichab measures of the metal strip through the rolling process are also shown to make the rolling process clearer. The cylindrical peripheral section 36 rolls on the metal strip 16 and reduces its thickness typically from 0.66 mm to 0.60 mm while equalizing the thickness. The end of the leveling step is shown in FIG. 6. The metal band 36 now comes out of the engagement of the cylindrical peripheral portion 36 of the second roller 12 , which rotates a little further until the recess 37 facing the Me tallband 16 . Preferably when the rollers 11 , 12 are stopped, the metal strip 16 is now brought back by reversing the two drive motors 7 and 8 designed as servomotors, namely by a length which is greater than L1 but less than L2; L2 is the length over which the metal strip 16 has been leveled. The length by which the metal strip 16 is retrieved is chosen so that in the next step ( Fig. 7) when the movement of the rollers 11 and 12 and the feed movement of the metal strip 16 are started again, the profiled peripheral portion 35 the roller 12 , which has the contour matched to the nibs, immediately after the beginning of the leveled section of the metal strip 16 punctures it ( FIG. 7) or slightly, for. B. 2 mm, behind. While the cutout 37 faces the metal strip 16 , the upper, second roller 12 is displaced downward by such a degree by rotating the spindles 32 and 33 that the profiled circumferential portion 35 of the roller 12 is next inserted into the metal strip 16 the desired penetration depth is reached. With further rotation of the second roller 12 and matched system feed of the metal strip 16 by means of the second reel 6 , the profile provided for the nib is rolled with the profiled peripheral portion 35 in the equalized portion of the metal strip 16 ( FIGS. 7 and 8). Fig. 8 shows the end point of the roll forming step. It ends at a short distance before the end of the equalized section at its level. As the upper roller 12 continues to rotate, the cutout 38 faces the metal strip 16 . In this phase, the upper roller 12 is displaced by rotation of the spindles 32 and 33 upwards again, so that the required height of the roll gap rolling step for the following Egalisier is set. 13 The location of the clearance 38 between the profiled peripheral portion 35 and the cylindri's peripheral portion 36 of the second roller 12 and the positioning of the metal strip 16 in the roll gap 13 by means of the servo motors 7 and 8 of the reels 5 and 6 is coordinated so that the next puncture of the cylindri's peripheral portion 36 at a small, about 2 mm distance behind the end of the previously equalized portion of the metal strip 16 ( Fig. 9), whereby a further leveling step, as shown in Figs. 9 and 10, is initiated.

During leveling, profiling and retrieval, the servomotors 8 and 9 ensure that the tension in the metal strip 16 is as uniform as possible.

The embodiment shown in FIGS. 11 to 16 differs from the embodiment shown in FIGS. 5 to 10 in that the upper roller 12 not only with two peripheral sections, but with three order sections 35 , 36 and 40 , which by savings 37 , 38 and 39 are separated from each other, acts on the metal strip 16 to be machined. The as provided for roll stand 2 has the same structure as shown in FIGS. 1 to 4 with the proviso that the upper roller is provided as 12 in FIGS. 11 to 16 shown inserted roller 12.

The peripheral portion 36 is cylindrical, whereas the two peripheral portions 35 and 40 have a non-cylindrical profile. As in the example of FIGS. 5 to 10, the cylindrical peripheral section 36 has the greatest distance from the axis of the roller 12 throughout, which is advantageous when it comes to regrinding the cylindrical peripheral section, which is used for leveling, as required.

The working method shown in FIGS . 11 to 16 corresponds to the working method shown in FIGS . 5 to 10 with the special feature that after leveling the relevant section of the metal strip 16 is not profiled in a single, but in two successive rolling steps, between which the metal strip 16 is retrieved again.

FIG. 11 shows, analogously to FIG. 5, the piercing of the cylindrical peripheral section 36 of the roller 12 into the metal strip 16 . FIG. 12 shows, analogously to FIG. 6, the end of the leveling rolling step. By turning the upper roller 12 further, the metal strip 16 comes out of its engagement and can be retrieved by the reel 5 . During this phase, the upper roll 12 is moved downwards by means of the spindles 32 and 33 in order to adjust the height of the roll gap 13 for the subsequent first roll forming process, the beginning of which is shown in FIG. 13. Fig. 13 corresponds to Fig. 7 and shows the piercing of the first non-cylindrical, profiled peripheral portion 35 of the roller 12th Fig. 14 corresponds to Fig. 8 and shows the end of the first roll forming step.

When the roller 12 continues to rotate, the metal strip 16 comes out of its engagement again and in this phase, while the cutout 39 faces the metal strip 16 , it is brought back again and by actuating the spindles 32 and 33 the roll gap 13 for the second roll forming step a set, the beginning of which is shown with the piercing of the profiled peripheral portion 40 in Fig. 15.

Fig. 16 shows the end of the second roll forming step. By turning the roller 12 further, the metal strip 16 becomes free again and can be positioned in the subsequent strip section for leveling, while simultaneously adjusting the height of the roll gap 13 provided for leveling. The sequence of steps shown in FIGS. 11 to 16 is then repeated.

This way of working is particularly suitable for the production of profiled Ab cut into ribbons where the desired stitch reduction is not or only heavy or not with the desired accuracy in a single profiling rolling step can be achieved.

The invention can also be carried out with more than two roll forming steps. In order to accommodate the required number of peripheral sections that participate in the rolling process, the diameter of the roller 12 can be increased as required.

It is also possible to provide, in addition to or in place of an equalizing rolling step, a reducing rolling step in which the thickness of the metal strip 16 is initially reduced evenly in sections before it is profiled in a later rolling step.

It is also possible to profile the metal strip 16 on both sides as required. In this case, a roller is used as the lower roller 11 instead of a cylindrical roller, which cut apart from one or more cylindrical peripheral sections in a similar manner to the upper roller has one or more profiled peripheral sections which are separated from one another by cutouts. If, as preferred, the two rollers 11 and 12 can be driven separately, they can be used for a variety of profiling tasks. So with ge separate drive of the rollers 11 and 12 can always be ensured that a zy-cylindrical peripheral portion of the one roller during the rolling process works together with any other peripheral portion of the opposite roller, regardless of how the sequence of the peripheral portions on each one Roller is selected.

The invention is not only applicable to the manufacture of writing materials springs, but also for the production of other ribbon-shaped materials, which is profiled in regularly recurring sections or continuously are, e.g. B. for the production of a band-shaped material for the production of electrical conductor structures such. B. contact springs or lead frames or for the production of grooved tapes, from which commutas are made by cross-sections gate slats can be formed.

Fig. 17 shows in a schematic diagram how the servomotors 7 and 8 of the two reels 5 and 6 , preferably likewise as servomotors trained electric motors 41 and 42 , for driving the two rollers 11 and 12 , and the two electric motors 34 which are preferably also servomotors with a subordinate gear 34 a and with which the upper roller 12 can be displaced by means of the spindles 33 and 32 , are linked to one another via a uniform electronic control device 43 . Thus, depending on a predetermined by the control device 43 and preferably stored in digital form profile shape, which is to be rolled into the metal strip 16 , controlled by controlling the servomotors 7 and 8, the feed of the metal strip 16 during rolling and during retrieval, matched to that Rollers 11 and 12 rotated, stopped and, if necessary, turned back and, depending on the feed of the metal strip 16 and the profile shape entered into the control device 43 , the roller 12 can be moved by actuating the electromotors 34 . The current positions are reported back to the control unit 43 by incremental rotary encoders. These encoders are part of the servomotors 7 , 8 , 41 and 42 . Between the spindles 32 and 33 and the two servo motors 34 , an incremental rotary encoder 44 is shown separately as an example.

FIG. 17 shows two cylindrical rollers 11 and 12, of which the upper roller 12 has a radial, axially parallel notch 45, to provide a reference for the rotational angle position of this roller to obtain 12. In the event that the upper roller 12 has a non-cylindrical peripheral portion, as shown in the previous examples, a displacement of the upper roller 12 during the rolling can be omitted; if necessary, it would then only take place between the individual rolling steps.

The curve according to which the displaceable roller 12 is displaced can not only be stored in the control unit by software. In principle, mechanical cam control is also possible with the aid of a cam disc running synchronously with the belt feed.

The roll stand shown in FIG. 17 can also be used to produce a starting material for proofs with a particularly high surface quality. The upper roller 12 expediently does not have the radial, axially parallel incision in this case or not over its full length, but only on one of its edges, which is sufficient to obtain an absolute reference for the angular position of this roller 12 . It is e.g. B. assumed that the circumference of the rollers 11 and 12 is matched to the diameter of the proofs to be produced that six proofs can be punched out in succession from egg ner length of the starting material, which is the same as the circumference of the rollers 11 and 12 . Therefore, the roll surface is divided into six equal peripheral sections I to VI. So that the inventive method z. B. be carried out like this: At the beginning, the outer surface of the two rollers 11 and 12 is lapped to a mirror finish. It is assumed that each section of the metal strip 16 is finished rolled in three rolling steps in a length which corresponds to approximately 1/6 of the circumference of the rolls 11 and 12 . For this purpose, a first strip section is rolled between the peripheral sections I, the roll gap 13 is opened, the metal strip 16 is retrieved around the rolled section, it is rolled again between the peripheral sections I, brought back a second time and then cut II finished between the peripheral sections.

The second section of the metal strip 16 is rolled in the first rolling step between the peripheral sections I, retrieved, rolled in the second rolling step between the peripheral sections II, retrieved and rolled in the third rolling step between the peripheral sections III.

The third section of the metal strip 16 is rolled in the first rolling step between the peripheral sections II, then retrieved, rolled in the second rolling step between the peripheral sections III, retrieved and rolled in the third rolling step between the peripheral sections IV.

The fourth section of the metal strip 16 is rolled in the first rolling step between the peripheral sections III, then retrieved, rolled in the second rolling step between the peripheral sections IV, retrieved and rolled in the last rolling step between the peripheral sections V.

The fifth section of the metal strip 16 is rolled in the first rolling step between the peripheral sections IV, retrieved, then rolled in the second rolling step between the peripheral sections V, retrieved and rolled in the last rolling step between the peripheral sections VI.

This cycle can be repeated as long as the surface quality that can be achieved with it meets the requirements. The number of cycles required to obtain the desired surface quality can be determined by preliminary tests. However, it is also possible to provide a thickness gauge between the roll gap 13 on one side and the second reel 6 on the other side, which measures the thickness of the metal strip 16 emerging from the roll gap 13 . Such a thickness measuring device 51 is shown schematically in FIG. 17 and shown more specifically in FIG. 19. The structure of the thickness gauge 51 is state of the art. It can be a measuring device with a mechanical probe head with a diamond tip, the deflection of which is picked up electrically, or a device which measures the strip thickness without contact with the aid of X-rays by measuring the weakening of the strip as it passes through the strip. Such a thickness measuring device 51 can, as shown in FIG. 17, be part of a control circuit in which it averages the actual value of the strip thickness, inputs this to the electronic control device 43 as an input value, which compares the actual value with a predetermined target value and an actuating signal therefrom forms for the two electric motors 34 , which effect a corresponding adjustment of the roll gap 13 .

With the device shown in Fig. 17 grooved bands or other longitudinally continuously profiled bands can be produced if one of the two rollers 11 , 12 is provided with a circumferentially corresponding profiling.

Fig. 19 shows an embodiment modified compared to Figs. 1 to 4. It differs from the embodiment of FIGS. 1 to 4 in that instead of reels 5 and 6, pliers feed devices 52 and 53 are provided. This embodiment is particularly suitable for shorter or thicker metal strips 16 , which can not be wound so easily. This embodiment is particularly suitable for the production of a starting material for proofs in lengths of z. B. a few meters.

The tong feed devices 52 and 53 have a slide 56 , 57 , which can be approximated and removed from the roll gap 13 in the horizontal direction by means of a servo motor 54 , 55 . For this purpose, a dovetail-shaped tongue 58 is provided on the underside of the carriage 56 , 57 , which engages in a matching dovetail-shaped groove 59 , 60 , which is formed on an attachment part 61 , 62 of the roll stand 2 . Through the engagement of groove 59 , 60 and tongue 58 , an exact horizontal guidance of the carriage 56 , 57 is achieved. Other types of guidance are possible. On each carriage 56 , 57 there is a lower jaw 63 rigidly attached to the carriage and an upper jaw 64 whose distance from the lower jaw is variable, preferably by means of a pressure medium cylinder. Between the jaws 63 and 64 , which form pliers or clamps, the metal band 16 is passed through and clamped as required. The Zangenvorschubein directions 52 and 53 can be actuated and moved individually but also mutually coordinated. In the second case, it is possible to maintain a defined tensile stress both during rolling and when retrieving in the section of the metal strip 16 clamped between the two pliers 52 and 53 .

The two tong feed devices 52 and 53 are, as shown in Fig. 19 Darge, the roll gap 13 arranged adjacent. Gap at the outlet side of the roll 13 is arranged in the rolling direction to the gripper feed device 53 following the device 19 for aspiration of rolling oil to which a thickness gauge joins 51, which reports the thickness of the rolled metal strip 16 contactlessly detected with a probe or and so that in the case of deviations from the desired thickness can be controlled or regulated to change the height of the roll gap 13 in a suitable manner.

List of reference numbers

1

foundation

2nd

Mill stand

3rd

Reception facility

4th

Reception facility

5

reel

6

reel

7

Drive motor (servo motor)

8th

Drive motor (servo motor)

9

Installation part for work rolls

9

a Installation part for work rolls

10th

Installation part for back-up rolls

10th

a Installation part for backup rolls

11.1

Roller (work roller)

12.2

Roller (work roller)

13

Roll gap

14

Backup roller

15

Backup roller

16

Metal strap

17th

Overflow roller

18th

Overflow roller

19th

Device for extracting rolling oil

20th

Roll neck

21

Roll neck

22

Roll neck bearings (roller bearings)

23

gimbal suspension

24th

propeller shaft

25th

Roll neck

26

Roll neck bearings (roller bearings)

27

Bearing shell

28

traverse

29

Threaded rod

30th

Belleville washers

31

mother

32

spindle

33

spindle

34

Electric motor

34

a subordinate gear

35

profiled peripheral section

36

cylindrical peripheral portion

37

Exemption

38

Exemption

39

Exemption

40

profiled peripheral section

41

Electric motors

43

electronic control unit

44

Encoder

45

incision

46

Hydraulic cylinder

47

Hydraulic cylinder

48

transmission

49

wave

50

gear

51

Thickness gauge

52

Plier feeder

53

Plier feeder

54

Engine for

52

55

Engine for

53

56

carriage

57

carriage

58

feather

59

Groove

60

Groove

61

Neck part

62

Neck part

63

lower jaw

64

upper jaw

Claims (72)

1. A method for producing a strip-shaped material made of metal by means of rollers ( 11 , 12 ) of a roll stand ( 2 ), which limit a roll gap ( 13 ) be by the metal strip is rolled in two or more than two rolling steps, characterized in that the metal strip (16) to which the metal strip (16) brought back of the metal strip (16) after rolling of a sol chen portion and the recalled section is rolled once again in successive sections between the same two rollers (11, 12) is in each case rolled discontinuous Lich, wherein the retrieved section of the metal strip ( 16 ) is chosen to be shorter than the circumference of the rollers ( 11 , 12 ). 2. The method according to claim 1, characterized in that the metal strip ( 16 ) is rolled even when retrieving. 3. The method according to claim 1 or 2, characterized in that the sections of the metal strip ( 16 ) to be retrieved are selected to be at most half as long as the circumference of the rollers ( 11 , 12 ). 4. The method according to claim 1, 2 or 3, characterized in that both rollers ( 11 , 12 ) are selected cylindrically. 5. The method according to any one of the preceding claims, characterized in that the last rolling step in each of the retrieved sections of the metal strip ( 16 ) between those peripheral sections of the two rolls ( 11 , 12 ), which is not in the preceding rolling step or steps have acted on the relevant section of the metal strip ( 16 ). 6. The method according to claim 5, characterized in that the step-by-step rolling of the relevant section of the metal strip ( 16 ) is carried out such that of the peripheral sections of the two rolls ( 11 , 12 ) which on the relevant section of the metal strip ( 16 ) act in the first rolling step on the relevant section of the metal strip ( 16 ) acting peripheral section of the two rolls ( 11 , 12 ) the greatest number and in the last rolling step on the relevant section of the metal strip ( 16 ) acting peripheral section of the rolls ( 11 , 12 ) have performed the least number of rolling steps. 7. The method according to claim 6, characterized in that as the lowest Number zero is selected. 8. The method according to claim 5, 6 or 7, characterized in that the outer surface of the two rollers ( 11 , 12 ) is reworked to restore the original surface quality if their peripheral sections, with which the least number of rolling steps were carried out, egg ne have reached the specified number of rolling steps. 9. The method according to claim 8, characterized in that the predetermined Number of rolling steps to the desired surface quality of the belt conveyor material is coordinated. 10. The method according to any one of the preceding claims, characterized in that the metal strip ( 16 ) is equalized by the rolling at the same time. 11. The method according to any one of the preceding claims, characterized in net that proofs for coins and medals made from the primary material become. 12. The method according to any one of the preceding claims, characterized in that a profile is rolled in sections in the metal strip ( 16 ). 13. The method according to any one of claims 1 to 3, 10 and 12, characterized in that a rolling stand ( 2 ) is used to produce a band-shaped material with a profile that returns in successive sections of the material, in which the height of the roll gap ( 13 ) is variable, and that the metal strip ( 16 ) with its sections to be profiled is repeated in steps of predetermined lengths ( 21 ) through the roll gap ( 13 ) until in the relevant sections of the metal strip ( 16 ) the depth of the desired profile of the primary material is sufficient. 14. The method according to claim 12 or 13, characterized in that in two or more than two rolling steps, a profile in the retrieved section of the metal strip ( 16 ) is rolled. 15. The method according to any one of claims 12 to 14, characterized in that the profile is rolled from above into the metal strip ( 16 ). 16. The method according to any one of claims 12 to 14, characterized in that the profile is rolled from below into the metal strip ( 16 ). 17. The method according to any one of claims 12 to 14, characterized in that a profile is rolled into the metal strip ( 16 ) from above and from below. 18. The method according to any one of claims 12 to 17, characterized in that the metal strip ( 16 ) in a first rolling step only reduced in thickness, but is not yet profiled. 19. The method according to claim 18, characterized in that the metal strip ( 16 ) is leveled in the first rolling step. 20. The method according to claim 18 or 19, characterized in that one or more roll forming steps between the two ben rollers ( 11 , 12 ) follow on the reduction rolling step. 21. The method according to claim 18, 19 or 20, characterized in that the Length (L2) of the reduction rolling step is greater than the length (L1) of the next stes subsequent profiling rolling step. 22. The method according to any one of claims 18 to 21, characterized in that the metal strip ( 16 ) after the reducing rolling step is retrieved by a length which is less than the length (L2) of the reducing rolling step and is greater than the length (L1 ) of the next subsequent professional rolling step in the same section of the metal strip ( 16 ). 23. The method according to any one of claims 12 to 22, characterized by the use of a roll stand ( 2 ) in which at least one of the two rolls ( 12 ) has a profiled section ( 35 , 40 ) in its outer surface with a contour, which together with the contour of the other roller ( 11 ) limits the roll gap ( 13 ). 24. The method according to claim 23, characterized in that before the rolling of a profile, the metal strip ( 16 ) in the roll gap ( 13 ) between the same rolls ( 11 , 12 ) first in steps of a length (L2) which the length ( L1) of the first profile rolling step is not less, equalized with a moderate decrease in its thickness, then retrieved by a step of at least the length (L1) of the first profile rolling step and at most the second length (L2) and then in the retrieved section of the metal strip ( 16 ) the profile is rolled,
and that the rollers ( 12 ) for leveling the metal strip ( 16 ) on their outer surface have a cylindrical peripheral portion ( 36 ) which may be cut from the profiled peripheral portions ( 35 , 40 ) having a non-cylindrical contour. 25. The method according to any one of claims 12 to 24, characterized in that a roller ( 12 ) of the rolling stand ( 2 ) for changing the height of the roll gap ( 13 ) is shifted during the rolling of the metal strip ( 16 ). 26. The method according to claim 25, characterized in that the upper or lower roller ( 11 , 12 ) is shifted during the rolling of your choice. 27. The method according to claim 25, characterized in that the roller in question ( 11 , 12 ) is displaced by a servo drive ( 32 , 34 , 44 ). 28. The method according to claim 27, characterized in that one or two electric motors ( 34 ) or one or two short hydraulic cylinders are used for the servo drive. 29. The method according to any one of claims 25 to 28, characterized in that the displacement of the roller ( 12 ) by means of a program-controlled drive bes ( 32 , 33 , 34 , 44 ), wherein in a programmable control unit ( 43 ) in the respective rolling step Profile to be generated as a control curve for the displacement of the roller ( 12 ) effecting drive ( 32 , 33 , 34 , 44 ) ge stores. 30. The method according to any one of claims 25 to 29, characterized in that one of the rollers, in particular the upper roller ( 12 ), has an axially parallel cut ( 45 ). 31. The method according to any one of the preceding claims, characterized in that the two rollers ( 11 , 12 ) are driven step by step and synchronously with the advance of the metal strip ( 16 ). 32. The method according to any one of the preceding claims, characterized in that the two rollers ( 11 , 12 ) are rotated differently when retrieving the metal strip ( 16 ). 33. The method according to any one of claims 13 to 32, characterized in that in the outer surface of the rollers ( 11 , 12 ) between the effective during rolling peripheral portions ( 35 , 36 , 40 ) see a clearance ( 37 , 38 , 39 ) is, which extends over such a circumferential angle that the respective following, effective during rolling peripheral portion ( 35 , 36 , 40 ) engages in the metal strip ( 16 ) only after the previous effective during rolling zen peripheral portion, the metal strip ( 16 ) released Has. 34. The method according to any one of the preceding claims in connection with claim 11 or 23, characterized in that the thickness of the metal strip ( 16 ) is reduced by a tenth of the thickness ver when leveling. 35. A method according to any one of the preceding claims, characterized net gekennzeich that the (5) abge wound to be rolled metal strip (16) from a first coiler and the rolled metal strip (16) positioned on a second reel (6) is wound, and that the The rotational speed of the rollers ( 11 , 12 ) and the peripheral speed of the second reel ( 16 ) can be matched to one another, in particular in the phase in which the rollers ( 12 , 13 ) are inserted into the metal strip ( 16 ). 36. The method according to any one of the preceding claims, characterized in that the insertion of a roller ( 12 ) at reduced speed of rotation of the roller ( 12 ) and accordingly at a lower feed speed of the metal strip ( 16 ) and that the movements are subsequently accelerated. 37. The method according to any one of claims 1 to 34, characterized in that the metal strip ( 16 ) is retrieved with a first pair of pliers ( 52 ). 38. The method according to claim 37, characterized in that the metal strip ( 16 ) with the first pliers ( 52 ) is also advanced for rolling. 39. The method according to claim 37 or 38, characterized in that the metal strip ( 16 ) is pulled during rolling with a second pair of pliers ( 53 ) which acts on the section of the metal strip ( 16 ) which leaves the roll gap ( 13 ). 40. The method according to any one of the preceding claims, characterized in that a tension is constantly maintained during rolling as well as during the retrieval of the metal strip ( 16 ) in this. 41. The method according to any one of the preceding claims, characterized in that the metal strip ( 16 ) is chosen so wide that two or more than two of the objects next to each other from the objects which are intended to be punched out of the primary material formed by rolling can be punched out horizontally. 42. Use of a device with a roll stand ( 2 ) with two rolls ( 11 , 12 ) which delimit a roll gap ( 13 ), the height of which is variable, and with a return device ( 5 ,) arranged on the inlet side of the roll gap ( 13 ). 52 ) for a metal strip ( 16 ) to be rolled,
for producing a band-shaped primary material made of metal with a profile, which recurs in successive sections of the primary material, according to the method according to claim 12,
for which purpose the first ( 11 ) and / or the second roller ( 12 ) has two or more than two circumferential successive, separate circumferential sections ( 35 , 36 , 40 ) on their lateral surface, which do not all have the same contour,
and for which purpose a drive motor ( 7 , 54 ) is provided for the return device ( 5 , 52 ) provided on the inlet side of the roll gap ( 13 ), which enables the metal strip ( 16 ) to be returned in steps of a predetermined length. 43. The use of a device according to claim 42, in which the return device is a first reel ( 5 ). 44. The use of a device according to claim 42, in which the retrieval device is a tong feed device ( 52 ). 45. The use of a device according to one of claims 42 to 44, in which a pulling device ( 6 , 53 ) is provided for the strip-shaped primary material on the outlet side of the roll gap ( 13 ). 46. The use of a device according to claim 45, in which the Ziehvor direction is a second reel ( 6 ) for winding the band-shaped Vorma terials. 47. The use of a device according to claim 45, in which the Ziehvor direction is a second tong feed device ( 53 ). 48. The use of a device according to one of claims 42 to 47, in which the two rollers ( 11 , 12 ) can be driven independently of one another. 49. The use of a device according to one of claims 42 to 48, in which at least one roller ( 11 , 12 ) has a cylindrical peripheral section ( 36 ). 50. The use of an apparatus according to claim 49, in which both rollers ( 11 , 12 ) have a cylindrical peripheral portion ( 36 ). 51. The use of a device according to any one of claims 42 to 50, in which the roll stand ( 2 ) is designed as a leveling mill. 52. The use of a device according to one of claims 42 to 51, in which the drive motor ( 7 , 52 ) for the return device ( 5 , 52 ) provided on the inlet side of the roll gap ( 13 ) is an electric servomotor. 53. The use of a device according to one of claims 42 to 52, in which the Ziehvor direction ( 6 , 53 ) provided on the outlet side of the roll gap ( 13 ) is driven by an electric servo motor ( 8 , 55 ). 54. The use of a device according to one of claims 42 to 53, in which the two rollers ( 11 and 12 ) on their side facing away from the roll gap ( 13 ) are each acted upon by a support roller ( 14 , 15 ), the roll neck ( 25 ) are preloaded in their roll neck bearings ( 26 ) to reduce their bearing play. 55. The use of a device according to one of claims 42 to 53, in which the first roller ( 11 ) and the second roller ( 12 ) are not acted upon by supporting rollers, but rather the roller journals ( 21 , 22 ) of the first roller ( 11 ) and the second roller ( 12 ) in their roll neck bearings ( 22 ) are biased to reduce their bearing play. 56. The use of a device according to one of claims 42 to 55, in which the first and the second roller ( 11 , 12 ) are driven discontinuously, such that they are provided in synchronism with the te on the Auslaufsei the roll gap ( 13 ) during the tape feed Pulling device ( 6 , 53 ) are driven, whereas they temporarily stand still and / or are positioned individually or together by forward rotation or reverse rotation if the return device ( 5 , 52 ) provided on the inlet side of the roll gap ( 13 ) for returning the metal strip ( 16 ) is driven in reverse. 57. The use of a device according to one of claims 42 to 56, in which the peripheral speed of the two rollers ( 11 , 12 ) and the Ge speed of the pulling device ( 6 , 53 ), preferably also that of the return device ( 5 , 52 ), are arbitrarily controllable. 58. The use of a device according to one of claims 42 to 57, in which one of the two rollers ( 12 , 13 ), preferably the upper roller ( 12 ), can be displaced up and down in a controlled manner during the rolling. 59. The use of a device according to claim 58, in which one or the other roller ( 11 , 12 ) can be shifted up and down in a controlled manner during the rolling. 60. The use of a device according to claim 58 or 59, in which one or more servo drives ( 32 , 33 , 34 , 44 ) are provided for moving the relevant roller ( 11 , 12 ). 61. The use of a device according to claim 60, in which the servo drives ( 32 , 33 , 34 , 44 ) each comprise an electric motor ( 34 ) or one or two short hydraulic cylinders. 62. The use of a device with a roll stand ( 2 ) with two rolls ( 11 , 12 ) which delimit a roll gap ( 13 ), the height of which is variable,
and with a return device ( 5 , 52 ) arranged on the inlet side of the roll gap ( 13 ) for a metal strip ( 16 ) to be rolled,
for producing a band-shaped primary material made of metal with a profile, which recurs in successive sections of the primary material, according to the method according to claim 12,
for which one of the two rollers ( 11 , 12 ) in the roll stand ( 2 ) during the rolling zens can be shifted up and down, specifically by a path determined by the desired profile depending on the feed of the metal strip ( 16 ),
and for which a drive motor ( 7 , 54 ) is provided for the return device ( 5 , 52 ) provided on the inlet side of the roll gap ( 13 ), which enables the metal strip ( 16 ) to be returned in steps of a predeterminable length, in particular a servo motor. 63. The use of a device with a roll stand ( 2 ) with two rolls ( 11 , 12 ) which delimit a roll gap ( 13 ),
and with a return device ( 5 , 52 ) arranged on the inlet side of the roll gap ( 13 ) for a metal strip ( 16 ) to be rolled,
for producing a strip-shaped primary material made of metal with a high surface quality by the method according to claim 1,
For which purpose, a drive motor ( 7 , 54 ) is provided for the return device ( 5 , 52 ) provided on the inlet side of the roll gap ( 13 ), which enables the metal strip ( 16 ) to be returned in steps of a predetermined length, in particular a servo motor. 64. The use of a device according to claim 62 or 63, in which a pulling device ( 6 , 53 ) for the strip-shaped primary material is arranged on the outlet side of the roll gap ( 13 ). 65. The use of a device according to claim 62, 63 or 64, in which the return device is a first reel ( 5 ). 66. The use of a device according to claim 62, 63 or 64, in which the return device is a first tong feed device ( 52 ). 67. The use of a device according to claim 64, in which the Ziehvor direction is a second reel ( 6 ) for winding the band-shaped pre-material as. 68. The use of a device according to claim 64, in which the Ziehvor direction is a second tong feed device ( 53 ). 69. The use of a device according to one of claims 58 to 68, in which a servo motor ( 8 , 55 ) is also provided for the pulling device ( 6 , 53 ) provided on the outlet side of the roll gap ( 13 ). 70. The use of a device according to claim 69, in which an electronic control unit ( 43 ) is provided, in which the displacement of the one roller ( 12 ) required for an intended profile is preferably stored digitally as a curve, and in that this control unit ( 43 ) the servomotors ( 7 , 8 ; 54 , 55 ) of the return device ( 5 , 52 ) and the pulling device ( 6 , 53 ), one or two servomotors ( 41 , 42 ) for rotating the two rollers ( 11 , 12 ) and one or a plurality of adjusting drives ( 32 , 33 , 34 ) coupled to the displaceable roller ( 12 ) are coupled to an incremental rotary encoder ( 44 ). 71. The use of a device according to one of claims 57 to 70, in which the direction of rotation of the two rollers ( 11 , 12 ) is reversible for rolling in both directions. 72. The use of a device according to one of claims 48 to 55, in which the displaceable roller ( 12 ) has an axially parallel cut ( 45 ).