DE10134285C2 - Method for producing a strip-shaped primary material, in particular made of metal, which is profiled in successive sections, and a device therefor - Google Patents

Description

The invention relates to a method for producing a band-shaped premate rials made of metal, which in successive sections one-sided or is profiled on both sides, and a device according to the preamble of the patent Proverbs 51.

DE 195 04 711 C1 describes a method for producing a band-shaped one Primary material made of metal known by rolling a roll stand, which egg Limit a roll gap in which a metal strip in two or more than two Rolling steps is rolled. It works so that the metal strip is repeatedly ge is rolled, which is why the roll stand continuously from start to finish passes through, the working direction is then reversed, so that the metal strip the roll stand then runs through the full length again, but now in reverse direction.  

From DE 104 875 C it is known for the production of tubes in a single Step of rolling a profile into strip or plate-shaped workpieces. A similar ver driving discloses DE 197 04 300 A1 for the production of profiled boards, named of body panels.

From US 3,233,444 A it is known in a roll nip which consists of a roll and a plate is formed to profile a metal blank on one side, namely dop pelt to form wedge-shaped leaf springs.

DE 638 195 C describes a pilgrim step process for producing thin strips known a thick starting workpiece. With this procedure the output Workpiece deformed step by step 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.

DE 199 38 966 C1 shows how a band-shaped pre-mat is profiled in sections rial with a consistently high surface quality can be produced economically. To For this purpose, the metal strip is cut in successive sections, which are shorter than the circumference of the two rolls, each between the same two rolls in rolled two or more than two rolling steps, including the metal strip between two successive rolling steps are retrieved and then the retrieved section of the metal strip is rolled again.

DE 199 38 966 C1 discloses a rolling stand for carrying out the method a first reel arranged on the inlet side of the roll gap for the wal zende metal tape and arranged on the outlet side of the roll gap second reel for winding the band-shaped material, for which on the Provided on the inlet side of the roll gap, a drive motor is provided, which enables the metal strip to be retrieved in steps of a predefinable length light, especially a servo motor. The length of the steps by which the metal strap is depending can be retrieved by an electronic drive control, in particular programmatically the  Be adapted to requirements. With such a program control also the discontinuous drive of the rollers with forward turning, standstill and if necessary with reverse turning optimally to the individual rolling task be adjusted.

It has now been shown that when the profiling roller is inserted into the Metal strip can happen that the band-shaped semi-finished product on that side, wel che facing away from the profiling roller, but not with the desired Ge accuracy is obtained in the desired form. This is particularly the case with Rolling of metal strips, which are profi sections only on one side on the other side but should remain level, but not exactly level will hold.

The present invention has for its object to show a way like a band-shaped semi-finished product, which is section-wise by a rolling process se to be profiled on the side facing away from the profiling roller higher accuracy can be obtained in the desired shape. in particular special is a band-shaped semi-finished product, which section only on one side should be profiled wisely, on the other hand with greater accuracy be preserved.

This object is achieved by the method with the in claim 1 given characteristics. One for carrying out the method according to the invention rens particularly suitable device is the subject of claim 51. Advantageous developments of the invention are the subject of Dependent claims.

According to the invention, a metal strip is rolled in a roll gap to produce a strip-shaped primary material from metal, which is delimited by a roll and by a plate. Rolling is carried out in one or more rolling steps by the following process steps:

• a) tensioning the metal strip,
• b) the metal strip is in a roll nip which is passed through a roll and through a movable plate is limited, positioned relative to the roller,
• c) positioning the plate relative to the roller,

wherein steps (b) and (c) are sequential or simultaneous or each other overlapping in time or successively in reverse order can be performed and step (c) can also take place before step (a),

• a) Piercing into the metal strip with the roller by reducing the distance the lateral surface of the roller from the metal strip, at least during at the start of the piercing, keep the metal band at rest or all if it moves so slowly and the roller does not, or at most so slowly is rotated that the metal strip remains under tension in the roll gap,
• b) rolling a section of the metal strip in the roll gap, for which purpose the roll ze rotated and the plate is moved in a straight line synchronously with it,
• c) releasing the metal strip by opening the roll gap, steps (b) to (f) for each section of metal to be profiled bandes can be repeated.

A “metal band” is also understood to mean a band that is not consists entirely of metal, but contains non-metallic components, e.g. B. oxidic, carbide or ceramic components or a metalloid such as Gra fit. Examples are strips made of composite materials such as silver graphite and silver Metal oxide, in particular materials based on silver-tin oxide with up to 20% by weight of non-metallic components. Belts made of such materials fin the use as semi-finished products for the production of electrical contacts.

If the metal tape to achieve larger stitch decreases and / or to Er aim for smaller dimensional deviations in the band to be benefited cut in more than one rolling step, then after the first  Procedure in one section repeats steps (b) to (f) this purpose after opening the roll gap in step (f) the metal strip retrieved and the metal strip in the roll gap by the action of the same Rolled again in the retrieved section. The tension in the Band is best selected on a throughout the procedure Value kept constant. This leads to greater positioning accuracy of the Metal strip in the roll gap and for greater dimensional accuracy.

In order to achieve particularly high accuracy and repeatability, the roll is first loaded before each rolling cycle or before each rolling step positioned with respect to their starting angle in a preselected reference position to avoid that position errors add up. Positioning the roller in A reference position is best done by turning back the roller and can be done before step (b), after step (b) or after step (c). When setting the starting angle of the roller, egg is preferably also already made ne Presetting of the size of the roll gap.

According to the invention, the metal strip is in the nip between a roller and one formed with this cooperating plate. Should the metal band only unilaterally benefited, then the plate is in the area in which the me tallband of the plate rests during forming, evenly formed. The plate will moving in a straight line during the rolling of a section of the metal strip synchronized with the roller with which the plate works. When back Fetching the metal strip is a movement of the plate in synchronism with the roller and / or with the metal band is not absolutely necessary, unless the me tallband would also be rolled when retrieving, which in a configuration of the method according to the invention may be the case.

If the metal strip is to be profiled on both sides, according to the invention The process first profiles one side, then the metal strip is turned det, so that its profiled side faces the plate, and then after  profiled the other side of the inventive method, it - depending on the profile shapes to be produced - it is particularly preferred to remove the plate exchange for such a record, which one on one side of the Me tallbandes already rolled profile has complementary corresponding profile, around the already profiled side of the metal strip when profiling the other To be able to optimally support the site. This is how you achieve the desired profiles with particularly high accuracy. The metal is used for profiling on both sides band expediently first profiled on one side at full length, then ge turns and then in a further run in one or more Rolling steps profiled on the other side. If necessary, the profiling roller replaced. Instead of replacing the plate, it can especially if the metal strip profiles on the second side which should be above the positions on the first page of the Metal strips have already been rolled in, be cheaper, a professional Supported roller with the largest possible diameter to support the me tallbandes if this is to be profiled on the second side.

In the event of a plate exchange or a backup whale in its place ze is used with a particularly large diameter, the pass line of It is best to roll something over that which protrudes from the plate or back-up roll Profile laid. This has the advantage that scratching the metal strip when Transport excluded and a vertical adjustment of the plate or on it If necessary, provided support roller with a particularly large diameter can be avoided. Otherwise the vertical adjustment would be required if the Back-up roller with its segment supporting the metal strip or the plate with it rem the profiled metal band supporting profile in the starting position for one new roll pass must be reset.

It has been shown that the method according to the invention produces tapes can be provided, which are profiled in sections, preferably only one-sided, and in which of the action of the roller on one side of the  Band unevenness on the other side of the band the previous approach is significantly reduced or even completely avoided become.

During rolling, the plate serves as the roller acting on the metal strip, wel che is also known as a work roll, as an abutment. She takes the roller forces and directs them appropriately into the stand of the rolling stand one in which also the work roll and suitably existing Back-up rollers are stored. The plate is preferably stored floating, what an easy, low-friction mobility in connection with a reliable allowed against force application.

It is best to proceed in such a way that the roller limits the roll gap from above and that the plate lies horizontally under the roller and by a backup roller is supported, which in turn is stored in the roll stand in the usual way. In In this case, the rolling forces can be transferred from the plate to the backup roll and introduced into the stand of the roll stand in a known manner become. In order to ensure a horizontal position of the plate, this is next to to support the back-up roller additionally, preferably on both sides of the roll gap, the load capacity of the support means being smaller can than that of the back-up roller, which is directly under the together with the plate menworking work roll.

A floating storage of the plate is advantageously achieved in that the plate is supported by rolling elements. It can be roles or Rolls act which one field is best on both sides of the roll gap form, which supports the plate in a plurality of places or lines, which can be distributed over the entire width and length of the plate. The Rolling elements can be driven, but need not be driven, son but can be designed free running. Particularly preferred as a rolling element  are free-running balls, on which the plate with its underside lies.

The plate can be driven directly, e.g. B. by means of a spur gear tooth crane zes, which is shrunk onto the support roller arranged under the plate and its moment on the rack attached to the plate transfers. This ensures exact positioning of the plate in every phase of the Movement of the plate possible, d. H. positioning, rolling and Retrieving. Furthermore, the drive of the plate is also hydraulic Piston-cylinder unit or by means of an electric motor NEN spindle, especially with a low-friction and precise ball circulation spindle possible. However, the plate is preferably not directly but only indirectly driven by driving the work whale ze and / or the metal strip is taken. There is because of the between the work roll and the plate pressure occurring appropriate friction.

It is also advantageous to drive the support roller to take the plate with it, wel che is arranged under the plate.

A great advantage of the invention is that it applies to other applications gene can be transferred. One application relates to the production of metal strips, which have grooves that are not in the longitudinal direction from the beginning of the tape to Extend the band end, but from one longitudinal edge to the other longitudinal edge of the metal strip across its entire width and return at intervals in the metal band. From such grooved Metal strips can be z by dividing the metal strips. B. contact springs or Electricity spiral blades for electric motors, especially for servo motors len. Advanced servomotors are getting faster and more accurate. This places increasing demands on the dimensional accuracy of the spiral helix len in these engines. The dimensional accuracy of the width of the groove should be better  than 0.02 mm. If you want to roll such a groove in a metal band, you have to one or more rolling passes required.

According to conventional technology, the groove is milled into the metal band, but is achieved you don't have a high surface quality. The milling of grooves that cross each other To stretch over the metal band is difficult. One has in the state of the art also tried to produce grooved band-shaped semi-finished products by that you have a longitudinal groove in several rolling passes in a metal strip rolls. In this case, side webs are retained in the metal band on both sides of the groove, wel limit the groove. Because the metal band in the area of the groove through the material displacement during rolling is lengthened accordingly, in the area of the screen tenstege but not, the side bars must be stretched to compensate, z. B. with reels, which develop a strong traction. Even if you are the be tenstege stretches, it is not possible to roll grooves whose depth is approx. 10% of the Thickness of the metal strip exceeds. In addition, the process is complex and does not lead to the desired accuracy because the metal strip with each rolling stitch suffers a distortion that causes the groove to roll from roll to roll stitch becomes somewhat wider as the fluctuations increase. Even those in the DE 104 875 C and working methods described in DE 197 04 300 A1 no high dimensional accuracy.

By step-by-step and section-wise rolling according to the invention however, generally profiled metal strips in which the profile over the ge The entire width of the metal strip extends, both with high dimensional accuracy also roll with a high surface quality, especially if this is the case discontinuous rolling process according to the invention is further developed so that Metal tape not only in one step, but in each of the sections to be profiled is rolled in several steps, which is why the metal strip after one Rolling step retrieved and rolled again in the section already rolled becomes. Particularly high accuracies can be achieved if the metal strip not just rolled in one direction and just retrieved in the opposite direction,  but if it is rolled in both directions, also when Retrieving.

A particular advantage of the invention is that it can be used to form profiles into strips let roll, which by cutting processes such. B. by milling over can not be produced at all, namely grooves which are transverse to Extend the longitudinal direction of the metal strip and have edges that are not in a straight line from one edge to the other edge of the metal band stretch, but in the longitudinal direction of the metal strip in pockets or Ni extend the edges, which in turn are straight or arched to have. Such grooves, which expand in pockets or niches, can follow in any case, the method according to the invention is rolled when the Pockets or niches do not widen the groove so much that there are problems with it the displacement of the material from the pockets or niches to be formed. Even curved and oblique grooves can be under An application of the discontinuous rolling process according to the invention in a Me be rolled.

In a particular embodiment of the invention, it is possible to form recesses with a closed border in a metal strip, but at the same time to obtain a flat surface area on the opposite side of the metal strip in the region of the formed recess. The outline of such a depression can be square, rectangular, oval, circular or another closed line. The edge of the depression can be a circumferential wall running perpendicular or almost perpendicular to the plate or a circumferential wall extending obliquely to the plate and widening outwards from the bottom of the depression. However, the edge can also gradually merge into the bottom of the depression, as with a flat depression. So far, such depressions in strips by an embossing process, for. B. formed by deep drawing, in which a bulge is formed on the opposite surface of the metal strip, which is milled to restore the flatness of the strip surface. The previous procedure is disadvantageous

• - Inadequate flatness of the belt surface and the bottom of the shaped deepening,
• - Variations in the strip thickness in the area of the bottom of the depressions in the Magnitude of one or a few tenths of a millimeter,
• - an irregular roughness of the strip surface at the point of the milled most bulges,
• - A reproducibility of profiled metal strips with tolerances, wel che are only in the range of a few tenths of a millimeter,

the quality deteriorates even more if there are several wells over the Width of the metal strip can be shaped distributed. In addition, the well-known Ver Driving uneconomical, since the formation of the wells on two local divided in time and procedures, namely in the stamping of the Ver deepening and in the milling of the resulting bulges.

In contrast, the formation of a profiled metal band with depressions, which have a closed edge, according to the invention Rolling process the main advantage that the wells are not timed and locally separate process steps have to be produced, but be produced simultaneously in the roll gap between a roll and a plate can. A plate with bumps can be used for this, Press the rolling process into one side of the metal strip, doing one amount of metal to the opposite side of the metal strip push where it is rolled out by the roller, so that the respective Ver opposite point of the belt surface is obtained.

The dimensional accuracy and flatness of the surfaces achieved according to the invention are a power of ten better than the conventional one herfahren.  

The method according to the invention is particularly advantageous when molding Ver depressions in a metal band if by rolling on the opposite lying side not only the dimension displaced by the shaping of the depressions material is rolled out, but if at the same time a moderate reduction in Total thickness of the metal strip is brought about, preferably in one Order of magnitude of 10% decrease in thickness. In this way, a be achieve particularly high accuracy.

The easiest way to form depressions that are trough-like or egg have ne peripheral wall, which runs obliquely in such a way that the Ver deepening extending from the bottom to the outside. To make one Deepening with a steeper, in particular with a vertical peripheral wall it may be advantageous to do this in two or more steps, whereby in a first step, a recess with an oblique peripheral wall, for. B. un ter an angle of 45 °, and only in a second step the order trap wall is formed steeper, z. B. almost 90 °.

The discontinuous multi-step rolling process according to the invention is particularly advantageous for the production of such profiled metal strips. To can the plate, which is opposite the driven roller, for a multiple profile rollers are always brought back. To scratch the me tallbandes during transport through the roll gap and an adjuster len the backup roller, which is arranged under the plate, the Pass line of the metal strip preferably slightly above that from the plate above profile, which is in the metal when rolling band should press.

The invention is particularly suitable for a regularly recurring pro to roll fil discontinuously in a metal strip; from such a metal band can be equal parts by mass by sharing the metal strip such as B. spiral helixes or contact springs for electrical purposes  gain high accuracy. The splitting of the metal strip is done appropriately usually by punching. The method according to the invention is also advantageous applicable to plated tapes and tapes to be plated, where the plates to be plated after the rolling according to the invention on various where heights are. Profiled tapes with a recessed plating cannot be achieved by known roll plating processes by rolling in strip produce longitudinal direction, because with larger degrees of deformation, especially at more than 50% deformation, the associated material shift to egg a serious problem.

With the discontinuous multi-step rolling process according to the invention, it is possible to produce the strip-shaped primary material with a particularly high and uniform surface quality and with the smallest thickness tolerances, or to produce a material with the quality known from the prior art without changing rollers in a greater length than previously. Thickness tolerances of ± 1 µm, repetition 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 at least two rolling steps in a section of the Me To be able to perform tallbandes, the circumference of the rollers should at least to be twice the length of the sections retrieved, with the retrieved section should be slightly larger than that in the longitudinal direction of the tape-shaped semifinished product to measure the dimensions of the semifinished product punching workpieces, so that the inevitable punching waste is taken into account Can be found. If the metal band is not only in one direction, but sometimes in the rolled in one direction and once in the other direction, then you can e.g. B. also proceed in such a way that the metal strip is between the same Ab a few times cut the roller and the plate back and forth and the last roller step between a peripheral portion of the roller and a portion of the Plate performs, which until then for a smaller number of rolling steps  were used and therefore have a better surface quality, so that in the last rolling step the metal strip also has a surface with opti Give goodness to painters.

If the sections of the metal strip are in one direction and sometimes in rolled the other way, you also get a cheaper work fabric structure, as if you only ever rolled the metal band in the same direction would zen. This is 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.

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

The accuracy and surface quality that could be achieved according to the invention sen, are larger than when milling, larger than when the metal band as in State of the art for creating a longitudinal groove repeatedly full length is rolled, which is because of the uneven occurring Elongation is only possible up to a decrease in thickness of at most 10%.

The discontinuous operation of the method according to the invention is carried out by egg significant contribution to the dimensional accuracy of the profile of profiled metal bands. Because of the discontinuous mode of operation, every rolling step begins out of the standstill of the metal strip, the roller and the plate or at so low speed that a tension chip prevailing in the metal strip Maintain voltage while inserting the roller into the metal belt  can be. Therefore, in the initial phase of each rolling step elongation of the me resulting from the engagement of the roller in the metal strip tallbandes unlike a continuous profile rolling process well-behaved, but so gentle that the important for the dimensional accuracy of the profile Tension remains in the metal band, e.g. B. by controlling the drive of reels, which are intended for maintaining the tension are. For this purpose, the roller and accelerate and brake of the metal strip during rolling preferably to the same extent and synchronously. The best thing to do in the metal strip is when inserting a constant tension maintained, and this is best maintained even when rolling.

If a profile is to be rolled section by section into a metal strip, then the Roll one, possibly in segments with the same or different Diameter divided, cylindrical jacket or a profiled jacket point. With a cylindrical jacket, a profile can be wal in the metal band zen, in particular by moving the roller, the height of the roll gap is changed during rolling.

The shorter they are, the better the dimensional accuracy and surface quality Are rolling steps. The rolling steps are advantageously shorter than half the order start of the roller selected. In this case, the profile only extends over one Part of the circumference of the roller. The remaining part of the outer surface of the roller can be cylindrical; that makes it possible with the cylindrical ab cut the respective surface of the metal strip in one not to profile the first rolling step, but to equalize it in order to achieve this to increase the dimensional accuracy of the rolled sand.

An application for which the invention can be used advantageously can to produce a ribbon-shaped material made of metal, which usually moderately recurring sections is concerned with nibs for Fountain pens.  

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 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, which extends across the entire width of the metal bandes extends. This profiled metal band is a primary material from which later the nibs are punched out and shaped into the desired curved shape be shaped.

In order to produce the profiled primary material, it is known to roll two of two gap-limiting rollers, 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 start of the circumferential section having the coordinated contour sticks a rotating roller in the metal strip and then takes it for the duration nes rolling step, namely as long as it is in engagement with the metal strip with and thereby causes both a feed and a profiling of the Me tallbandes. The metal strip is unwound from a first reel and that profiled metal strip emerging from the roll gap from a second reel rolled up. Because the feed of the metal strip is effected by the two rollers between them and the second winding reel usually a certain lot length of the metal strip, which it is in the prior art makes it necessary to advance a belt loop with a belt tensioning device hen, which creates a balance between the discontinuous  Belt feed through the rollers and the continuous winding movement the second reel. This is associated with some equipment, the is disadvantageous.

Profiled strips produced in the known manner have undesirable ones Dimensional deviations.

In contrast, the present invention shows a way how a profiling tes band-shaped material z. B. for nibs with greater accuracy, can be manufactured. In addition, the flat, level support of the Me provides tallbandes in connection with a grooving which is best initially non-rotating roller in the quiescent metal belt make a significant contribution. To effect the piercing, the roller is against the plate that is still at rest relocated. Another contribution is made in that the tape tension in all phases of the rolling process can be maintained. With the known The process is different because the rollers there remain the same all the time the speed circulate, causing the grooving of the profiled roller and with it the tape feed starts suddenly and also ends again who the. A uniform tensile force in the metal strip during profiling, which would be favorable for a uniform work result with high dimensional accuracy not possible with the known method of working.

The metal band comes in one with higher accuracy requirements or in the case of large passes, in several rolling steps until they are reached the depth of the desired profile of the primary material is rolled. In the case of several The metal strip is rolled between two successive rolls steps back and then the retrieved section of the metal band rolled again between the roller and the plate. But it can already when retrieving the relevant section of the strip are rolled again. Only when in a section of the metal strip to be profitable in one or several rolling steps and optionally after one or more  Return steps the desired profile has been rolled becomes profiling of the next band section of the metal band this next band section conveyed into the roll gap, precisely positioned in its longitudinal direction and then processed in the nip.

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 Roller z. B. by turning the roller back and if necessary by moving it back a similar first rolling step in a subsequent strip cut, then pull the tape back two steps, then in the first strip section a second rolling step and then in the second strip cut to perform the second rolling step.

The variant of the invention dealing with the production of one-sided profiled primary material with repeated rolling steps has significant advantages:

• - In that the profile of the metal strip is produced in several rolling steps will achieve greater dimensional accuracy than before, which z. B. at Nibs especially in the later shaft area.
• - Since the desired profile in a section of the metal strip is not by egg NEN, but generated by two or more than two rolling steps harder metal strips can be profiled, even spring-hard Bands.
• - In that the profile of the metal strip is produced in several rolling passes different types of rolling such as leveling, pre-profiling, Plating, mask rollers and mirror rollers one after the other in below different order on the same section of the metal strip leads.
• - This opens up the invention to applications beyond the pen area go out and recorded a variety of profiled parts that from one band-shaped semi-finished product and isolated by punching the band  can be. Application examples are electrical conductor structures such as z. B. contact springs, Stromwendelamellen 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.
• - The versatility of the invention contributes to the fact that the metal band is not in everyone Rolling step must be profiled, but single in a first rolling step Lich can be evenly reduced in thickness, for which the roller everyone if also has a cylindrical section, if not cylindrical anyway is.
• - The progress that the invention brings is made by minimal apparatus Effort reached. Starting from a rolling stand known per se, in to replace this essentially only one work roll with a plate and modify the way of working that leads to profiling. Is the Profiled roller in the circumferential direction, then it is preferably designed so that they are successively sections with differing circumferentially cher contour, which ge in particular through savings from each other are separate and in connection with the preferred retrieval of the metal ban a repeated rolling of the same section of the metal strip allow.
• - It is also possible to make the roller cylindrical and to achieve the necessary change for a Profilie the height of the roll gap during rolling by that the roller and / or the plate, preferably the roller, which is preferably above the plate, relocated in the rolling stand. That can e.g. B. happen with an electric motor that drives spindles that act on the roller and / or plate to be shifted and are coupled with egg nem a repeatable setting enabling incremental rotary encoder, with the help of which the electric motor is controlled. It is also possible to move the roller and / or the plate hydraulically by positioning a hydraulically operating cylinder in each roller stand in the head or in the lower transverse yoke. The two hydraulic cylinders are integrated in the hydraulically operating roller adjustment and are approached by means of a position control with force monitoring. The control can be equipped with servo valves as actuators and with position sensors and pressure sensors as actual value sensors. This makes it possible to approach almost any given curve, depending on the profile to be rolled, with the roller. Compared to the use of an electronically controlled electric servo drive, a hydraulic adjustment system has the advantage of being faster and more precise.
  With such a servo drive for moving the roller and / or the plate serving as its abutment, it is possible to roll a profile into the metal strip with a cylindrical roller in one or more steps. It depends on the desired profiling, how to choose the diameter of the roller and how to shift the roller relative to the plate depending on the belt feed. A corresponding control curve derived from the profile for the drive which is intended to displace the roller relative to the plate can be stored as a control curve in a programmable electronic control unit. By storing several control cams, according to the invention, a corresponding number of different profiling tasks in metal strips can be mastered with a roll stand without replacing the roll.
  It is also possible to apply the shifting of the roll during rolling to a roll stand which has a profiled roll. By such a combination of two different ways to change the height of the roll gap in the course of rolling, namely by using a profiled roll in combination with the displacement of the roll relative to the plate, the versatility of the roll stand can be made in sections profiled belts.
  If you are working with a cylindrical roller, it is advantageous to provide it with an incision parallel to the axis, in order in this way to obtain a reference for the angular position of the roller.
• - The exact positioning of the required roll segment to the Me tallband can be done with the help of a regulation for the roll rotation angle.
• - For the return of the metal strip comes the return device, for. B. egg ner first reel from which the metal strip to be profiled is unwound becomes of special importance because it is the length of the step to which wel the metal strip is retrieved, can reproduce with sufficient accuracy must. To do this, you provide this first reel, expediently also the pulling the metal strip second reel z. B. with a servo motor, which has an incremental encoder, the exact definition of ge desired step length when unwinding and also when winding. You can set the stride length more precisely if you use the reels with Belt overflow rollers, which are coupled with an incremental rotary encoder pelt, which serves as an actual value transmitter in the belt position control.

The width of the metal strip can be dimensioned so that each of the one on top of the other 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 if wider tapes are processed like this are wide, that from each profiled section of the primary material two or more Ge profiled as two adjacent nibs or the like objects can be formed.

A particularly advantageous development of the invention is the subject of the To Proverb 22. According to this development of the invention, the metal strip is before equalized the rolling of the profile. Leveling is a rolling of the Understood metal strip in a roll stand with a highly constant roll gap, whereby the thickness fluctuations of the metal strip are reduced. rolling scaffolds with two work rolls for leveling are from DE 25 41 402 C2 known, which is referred to for further details. At one for Zwec ke the roll stand suitable for the invention becomes a highly constant roll gap  thereby achieved that on the outside of the roll neck bearings elongated roll neck from two backup rolls, one of which the plate supports from below and the other supports the work roll from above, perpendicular to who exerted biasing forces directed away from the rolling stock those that can be aligned vertically and preferably in one around the Roll angle deviating from the roll axis plane, due to the incoming Metal strip going line of action. In this way it will work play of the rollers in the roll neck bearings reduced.

According to the invention, it is therefore not necessary for the purpose of leveling the rolling stand intended for profiling the metal strip, the rolling stand that serves to equalize. Rather, they will Equalize and benefit in one and the same rolling stand, why the metal band not only in the profiling steps is moved in the feed direction through the roll gap. Rather, the metal first tied in steps that - taking into account the following Profiling stretching of the equalized section that is still taking place - at least are as long as the profiling step, with a moderate decrease in thickness ke equalized. After that, the metal band is moved by one step at least length required for profiling and at most the length specified for leveling pushed back length and after that is in the retrieved section rolled the profile of the metal strip. In a roll stand in which the ar beitswalze is profiled and has a peripheral portion with the contour, which to the desired course of the thickness z. B. a pen is matched, the roller that has to be made from the metal strip has this Purpose additionally a cylindrical peripheral portion, which of the the contoured peripheral portion is separated (claim 25). With the the equalizing step is performed. The cylin drischer peripheral section is in terms of its determination and under Be taking into account the elongation of the metal strip that occurs during rolling so long chosen that the leveled section of the metal strip at least the length of the  Pen has, is preferably a little longer, so that the beginning and / or the end of the profiling step a distance from the start and end of the equalized section.

The roll stand used for profiling is therefore advantageously at the same time as one Roll stand designed for leveling and with a step forward and backward working tape feed.

The development of the invention according to claim 28 and according to claim 34 has significant advantages:

• - The thickness fluctuations of ± 20 µm in the primary material and thus also in the workpieces to be made therefrom, e.g. B. nibs, can on less than ± 2 µm, e.g. B. reduced to ± 1 µm in a single nib, especially in the later shaft area of the nibs.
• - The reproducibility of the course of the thickness from pen to pen that can be reduced to less than ± 4 µm, e.g. B. can be improved to ± 2 microns.
• - These are accuracies in the manufacture of quills by whale zen have not yet been achieved. 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, if necessary, to modify the profiling work roll by providing a suitable cylindrical section, it is to replace a work roll with a plate and it's the whale pre-chucking the journal of two support rollers to reduce the bearing play NEN, e.g. B. in one of the ways disclosed in DE-25 41 402 C2. Moreover one needs means that not only a gradual advancement, but also allow a gradual return of the metal strip in steps that un are as long as the steps in leveling. As can already be the case  mentioned, simply by having at least one first reel, from which the metal strip to be profiled is unwound with an elec tromotor provides, which with sufficient accuracy in steps of control the desired length and change direction in the direction of rotation. The is preferably done with a servo motor, which has an incremental Encoder has an exact definition of the desired step length ge during unwinding and rewinding, or by means of two servo controllers with load cells on pulleys for the metal strip, as an actual value transmitter for Reels which unwind and wind up the metal strip and the tension chip Realization in the metal band or alternatively by control electronics in Position control can be maintained. Serve best as an actual value generator two incremental encoders, which are positioned on the two pulleys of the reels are tioned. A servo motor is usually with a subordinate Ge shoots connected. When we talk about servomotors below, assumes that they usually also with a subordinate gear be connected.

A second reel, which works as a pulling device, is also preferred the profiled metal strip is wound up, provided with such a servo motor.

• - This has the further advantage that the interaction of the Servomoto ren in all phases of the method according to the invention, when piercing, when leveling as with profiling and when retrieving the metal strip on this a defined move can be exercised, which the achievement a uniform material with small thickness fluctuations Stigt. This move should be as constant as possible and a certain reason Do not fall below tractive force, which when manufacturing nibs such. B. 500 N can be. The first reel pulls this when retrieving Metal tape with greater force against the smaller reeling force of the second Reel. By maintaining a reason as consistent as possible traction in the metal strip in all phases of processing the metal strip the aim is to improve the uniformity of the rolled stock and  one avoids the occurrence of a band course, d. that is, the metal band warps not yourself.
• - Another advantage of driving the reels with servo motors is that that the tape feed and the drive of the roller matched each other so well can be true that different from the prior art instead of one continuous drive of the roller a discontinuous roller drive he can follow. In particular, the speed at which the puncture of the profiled roller into the metal belt, on the belt feed speed be adjusted so that no abrupt acceleration when piercing cleaning of the metal strip. In particular, the pricking of the profi the roller in the metal strip first at rest or with a slow strip feed and take place with slow roll rotation, followed by a be accelerated belt feed movement and roll rotation. This is for that Achieving low dimensional tolerances is particularly advantageous.
• - Because the metal strip by means of a strip position control in the roll nip is positioned relative to the roll using a roll rotation angle control is precisely positioned for each rolling step, remain the benchmark Depending on the profile, gaps in the profile spacing are in hundredths of a millimeter Area.
• - Another advantage of using servo motors to drive the has peln is that special tape tensioning devices, 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, before preferably also on the vertical displacement of the roller, in particular at one by a cylindrical roller shell or roller shell section limited roll gap to change its height and thereby a certain Generate profiling.

The retrieval of the metal strip can not 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 Form is particularly suitable for working on shorter or stiffer banks the. If the return device is designed as a tong feed device, it can they are also used to advance the metal strip and the Feed roll gap.

The sequence control of the method depends on the return device, wel the control of the belt position, the angle of rotation of the roller and the Position of the roller linked together.

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 Bands.

The quality of the strip-shaped primary material produced is increased, if so probably when piercing as well as when rolling and when retrieving the ban a defined train is maintained in this, in particular by means of egg ner tension control with two servo controllers and load cells on the um steer rolls as actual value transmitter for the reels, whereby this favorable influence all the more occurs more, the thinner the metal band. But also with thicker belts it is advantageous to insert the tape during piercing and during rolling and back catch up between the return device and the pulling device by one coordinated movement of these two devices under tension to hold and to guide exactly.

In the method according to the invention, the optimal belt tension can be achieved in all Phases of a rolling step are maintained, especially in the  critical phase of inserting a profiled roller into the metal strip, because because each rolling step due to the nature of the discontinuous invention orier multi-step rolling process from standstill of the roller, the plate and the metal strip starts out, the engagement of the profiled roller takes place in the metal band not suddenly, but so gently that in this critical phase se of the profiled roller in the metal strip and in the whole ten rolling step the tensile force of the belt tensioning device, for. B. the reels, on egg optimal constant value for the respective band can be regulated. because to become the reel and the roller when accelerating and braking the Metal strip and the roller syn with advantage with their respective drive motors chronically and to the same extent accelerated or braked.

The optimal preload with which the bearing play of the back-up rollers is gone can be determined empirically for the respective application and then remains constant for the application. The optimization takes place before preferably so that the elongation of the Roll stand determined when leveling and by appropriate setting of the pre voltage is compensated.

The invention is not only applicable to the rolling of metal strips in the sense of how the term "metal band" is used here, but also on Tapes made of plastic, and tapes made of a composite material Plastic base exist, for example a plastic with metallic or mi general or ceramic fillers, or metallized plastic tapes like metal straps coated with plastic.

The device specified in claim 51 for producing a tape shaped primary material, in particular made of metal, by rolling a strip according to the inventive method has a roll stand in which a Roller and a linearly displaceable plate facing the roller one Limit the roll gap, as well as one on the inlet side of the roll gap  arranged return device for the tape, for which a drive motor in front is seen, which is a return of the tape in steps of predetermined Length allows, in particular a servo motor, the plate being synchronized with the roller and / or with the belt in the predetermined direction of movement the strip has in the roll gap, can be driven and is also independent of the strip is drivable and retrievable. The ability to synchronize the plate with the roller and / or moving with the belt ensures that the belt is rolling does not experience any slippage on the plate immediately in the roll gap. Beyond that the plate can be driven and retrieved independently of the tape in order to Completion of a rolling process in a selected section of the strip To be able to retrieve the plate without having to retrieve the tape so that it can be rolled in a subsequent section. Driving the disk can be done directly, but is preferably done indirectly, by the plate at Rolling from the driven roller and from the driven belt preferably also from one arranged under the plate and supporting the plate the driven backup roller is taken. The latter can the plate between also retrieve two successive rolling steps; that's enough the frictional engagement between the support roller and the plate lying on it from, the frictional force caused by the weight of the plate required Chenfalls by pressing elements, which the plate against the Press backup roller, can be reinforced. With such pressing elements it is, for example, roles that by pressure medium cylinders the plate can be pressed.

Profiled metal parts obtained by cutting metal strips and in sections by only one rolling step of the discontinuous rolling process rens are formed, find z. B. use in the automotive industry and can NEN there replace metal parts that were previously expensive using welding processes be put.  

Further details of the invention emerge from the attached schemati rule's 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 a section of the machine that is enlarged compared to FIG. 1, namely the main part of the roll stand of the machine,

Fig. 3a shows the detail X from FIG. 3,

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

FIG. 4a shows the detail Y from FIG. 4,

Fig. 5-10 show a flow diagram of a first machine with the ausführba ren working method,

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

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

Fig. 18 shows a modified machine according to the invention in one of the Fig. 1 representation corresponding

Fig. 19 shows a producible by the invention metal band with grooves which widen in the rectangular slots,

Fig. 20 shows a producible by the invention metal band with grooves which extend in an arcuate recess, and

Fig. 21 shows a producible by the invention metal band with grooves which widen in the rectangular slots, and with recesses which have a closed outline.

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 a roll stand 2 is built in the middle, in front of and behind which in each case a receiving device 3 and 4 for a reel serving as a return device 5 and egg ne as a pulling device serving reel 6 is attached, which can be driven by a drive motor 7 , 8 designed as an electrical shear servo motor.

In the side built-in parts 9 of the roll stand, a work roll 12 , hereinafter referred to simply as the roll, is mounted which, together with a flat plate 67 arranged below it, delimits a roll gap 13 . Above the roller 12 and below the plate 67 , a support roller 14 or 15 is installed in built-in parts 10 and 10 a, which is larger in diameter than the roller 12 . The built-in parts 9 , 9 a of the work roll 12 are each in a cut from the built-in parts 10 , 10 a of the support rolls 14 , 15 .

A strip to be machined, in particular a metal strip 16 , runs from the reel 5 via an overflow roller 17 into the roll gap 13 , passes through it and passes via a further overflow roller 18 to the second reel 6 , which processed the in the roll stand 2 Metal tape 16 wound up. Zvi rule the nip 13 and the second guide roll 18 is yet Einrich tung 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 roller 12 , the diameter of which is only approximately 1/3 of the diameter of the support rollers 14 and 15, is mounted with its roller journals 20 and 21 in roller journal bearings 22 , which are formed as roller bearings. A roll neck 21 of the roller 12 is extended beyond its roller base 22 and also forms part of a gimbal 23 which enables the drive of the roller 12 by means of a cardan shaft 24 . An electric motor 41 driving the roller 12 synchronously via the cardan shaft 24 is shown in FIG. 2. It drives the roller 12 and the lower support roller 15 via a branching gear 48 . But it is also possible to drive the roller 12 and the backup roller 15 by two separate motors.

The support rollers 14 and 15 have roll journals 25, which are formed as a roller bearing in rolling journal bearing 26 of the lateral fitting portions 10 and 10 a gela device. 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 braced with the foundation 1 , while the bearing shells 27 of the upper support roller 15 are tensioned 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 plate springs 30 is net angeord, which is tensioned by a nut 31 . This is only shown above the traverse 28 , but is provided in the same way on the foundation 1 . 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 roller 12 and the support rollers 14 and 15 thus achieve a concentricity of ± 1 μm.

The plate 67 is not supported solely by the lower support roller 15 , but additionally Lich by two fields of bearing bodies 65 with roller bodies 71 , one field of which is arranged on the inlet side of the roll gap 13 and one field on the outlet side of the roll gap 13 . The rolling elements 71 are free-running balls and each can be found in a pot 69 , which is tightly closed by a spherical lid 70 . The lid 70 has a circular centrally arranged opening through which a ball 71 arranged under the lid, the diameter of which is larger than the diameter of the central hole, engages with part of its ball surface. The ball 71 is pressed against the crowned cover 70 by a spring 72 arranged in the pot 59 . In this way, the ball 71 between the edge of the central opening of the lid 70 and the Fe 72 is resilient and otherwise freely movable. The bearing body 65 are arranged in the two fields so that their balls lie with their top in a common plane in which they support the underside of the plate 67 fe smoothly and smoothly, that is, with low friction. The bearing bodies 65 are arranged in brackets 66 , which are mounted on the roll stand 2 so as to be adjustable in height. The height of the bearing body 65 is adjusted so that the plate 67 presses the balls 71 slightly from the edge of the central opening in the cover 70 during rolling, when it is pressed against the lower support roller 15 .

The lower backup roller 15 is adjustable by means of a wedge-working device Verstelleinrich 73 , which is arranged between the two roll stand window beds and the lower roller bearing bodies of the lower backup roller 15 , in the vertical direction. The plate 67 can thus also be adjusted in the vertical direction.

On the underside of the plate 67 , two toothed racks 82 , which are parallel to one another and which extend in the direction of the double arrow ( FIG. 3), are fastened with the interposition of disc springs 84 ; The toothed racks 82 mesh with two toothed rings 83 which are fastened laterally on the lower support roller 15 , in particular by shrinking onto the support roller 15 . In this way, the plate 67 can be driven very accurately by the lower support roller 15 , which in turn is driven by the electric motor 41 ( FIG. 2). The plate springs 84 compensate for a flattening of the support roller 15 , which can be caused by the rolling forces.

Alternatively, the plate 67 does not have its own drive, but is taken along by the synchronous driving of the roller 12 , the metal strip 16 and the lower support roller 15 by a frictional engagement. If the plate 67 is to be retrieved between two rolling steps, this is done by driving the lower support roller 15 in the appropriate direction, the required friction circuit between the support roller 15 and the plate 67 being caused by the weight of the plate 67 . If the dead weight is not sufficient for a reliable friction circuit, the plate 67 can also be pressed against the support roller 15 by pressing rollers, not shown, with the aid of pressure medium cylinders onto the top of the plate 67 .

The required bias 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 by its own stand, arranged on the top of the roll stand 2 , electric motor 34 ( 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 plate 67 has a flat top. The roller 12 has a lateral surface ( Fig. 5) with a profiled peripheral portion 35 , which has a length L1 measured in the circumferential direction of the roller 12 , and a cylindrical peripheral portion 36 , which has a length L2 measured in the circumferential direction of the roller 12 , both of them separated by two exemptions 37 and 38 . The cylindrical peripheral portion 36 of the lateral surface has the greatest distance from the axis of the roller 12 , the recesses 37 and 38 have the smallest distance from the axis of the roller 12 . The profiled peripheral portion 35 of the Mantelflä surface has a contour, the course of which is coordinated in the circumferential direction with the longitudinal course of the thickness of a workpiece, for. B. a pen, which is finally to be made from the metal strip 16 .

In Figs. 5 to 16, the plate 67, which supports the metal strip 16 in the rolling is 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 portion 36 of the roller 12 sticks, gently when the metal strip 16 is stationary and when the roller 12 is not rotating, at most at a slower rate a low peripheral speed of the cylindrical peripheral section 36 is adapted to 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 strip 16 . In the further course of FIGS. 6 to 16, the stitch decreases of the metal strip by the rolling process are exaggerated to make the rolling process clearer. The cylindrical To start section 36 rolls on the metal strip 16 and reduces its thickness typically from 0.66 mm to 0.60 mm while leveling the thickness ke. The end of the leveling step is shown in FIG. 6. The metal band 16 now comes out of the engagement of the cylindrical peripheral portion 36 of the roller 12 , which rotates a little further until the recess 37 facing the Me tallband 16 . Before preferably with the roller 12 and the plate 67 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 15 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 roller 12 and the feed movement of the metal strip 16 are started again, the profiled peripheral portion 35 of the roller 12 , which has the contour matched to the workpieces to be produced, immediately after the beginning of the leveled section of the metal strip 16 gently punctures it ( FIG. 7) or slightly, e.g. B. 2 mm, behind. While the cutout 37 faces the metal strip 16 , by rotating the spindles 32 and 33, the roller 12 is shifted downward to such an extent that the profiled circumferential portion 35 of the roller 12 which is pierced into the metal strip 16 next reaches the desired insertion depth becomes. Upon further rotation of the second roller 12 and the feed of the metal strip 16 coordinated therewith by means of the second reel 6 , the intended profile is cut with the profiled peripheral portion 35 and extends over the entire width of the metal strip 16 in its equalized section ( 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 rotation of the roller 12 progresses, the cutout 38 faces the metal strip 16 . In this phase, the upper roller 12 is moved upwards again by rotating the spindles 32 and 33 , so that the height of the roll gap 13 required for the subsequent leveling rolling step is set. The location of the clearance 38 between the profiled circumferential portion 35 and the cylindrical circumferential portion 36 of the 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 matched to one another so that the next puncture of the cylindrical peripheral section 36 takes place at a small, approximately 2 mm distance behind the end of the previously equalized section 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.

Unless it is the greater accuracy that can be achieved by the leveling step does not arrive, it can be omitted and the metal band can be in its relevant sections are processed by only one rolling step at a time, namely by those through which the section is profiled.

The embodiment shown in FIGS. 18587 00070 552 001000280000000200012000285911847600040 0002010134285 00004 18468 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 peripheral sections 35 , 36 and 40 , which are separated from one another by cutouts 37 , 38 and 39 , acts on the metal strip 16 to be machined. The roll stand 2 provided for this has the same structure as that shown in FIGS. 1 to 4, with the proviso that the roll 12 shown in FIGS. 11 to 16 is used as the roll 12 , the profiling of the roll 12 over exaggerated is strongly depicted. The leveling step is not mandatory in this example either.

The peripheral portion 36 is cylindrical, whereas the two peripheral sections 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 rotating the roller 12 ge the metal band 16 is afraid of its engagement and can be brought back through the reel 5 . During this phase, the roller 12 is shifted 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 section 35 of the roller 12 . 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 of 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 profiling step. By turning the roller 12 further, the metal strip 16 becomes free again and can be positioned for leveling in the subsequent section of the metal strip 16 , with simultaneous or subsequent adjustment of the height of the roll gap 13 provided for leveling. The sequence of steps shown in FIGS. 11 to 16 is then repeated. In order to achieve a high reproducibility of the angle of rotation of the roller 12 , it is best to turn the roller 12 back into a predetermined starting position (e.g. 0 ° position) after each process cycle in order to avoid inaccuracies being caused by continued full rotations add the roller 12 .

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 difficult 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 be able to accommodate the required number of peripheral sections which take part 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 a leveling rolling step, a reducing rolling step in which the thickness of the metal strip 16 is initially evenly reduced in sections before it is profiled in a later rolling step.

The invention is not only applicable to the manufacture of primary material for nibs, but also to the manufacture of other ribbon-shaped materials, which are profiled in a series of regularly recurring sections over the entire width of the metal strip 16 , for. B. for the production of a strip-shaped material for the production of electrical conductor structures such. B. contact springs or lead frames or for the production of grooved strips with transverse to the longitudinal direction of the metal strip 16 parallel or not par allel to the roller axis grooves with or without pockets or niches, which grooves extend continuously from one to the other longitudinal edge of the tallbandes and from which z. B. commutator bars, electrical connectors or other electrical contact parts can be punched out. Stiffened sheet metal parts for the automotive industry can also be manufactured inexpensively and with high accuracy. Any profile shape that can be produced with the help of optionally profiled rollers can be formed by the method according to the invention.

Fig. 17 shows a schematic diagram of how the servomotors formed from drive motors 7 and 8 of the two reels 5 and 6 , preferably also designed as servomotors, electric motors 41 and 42 for driving the roller 12 and the backup roller 15 , and the two Electric motors 34 , which are preferably also servomotors with nachgeordne system 34 a and with which by means of the spindles 33 and 32, the roller 12 can be moved, via a uniform electronic Steuerge advises 43 are linked together. Thus, depending on a profile shape given to the control device 43 and preferably stored in digital form, which is to be rolled into the metal strip 16 , the feed of the metal strip 16 during rolling and during retrieval can be controlled by controlling the servomotors 7 and 8 , the roller being matched thereto 12 and the back-up roller 15 rotates, stops and, if necessary, turned back and, depending on the feed of the metal strip 16 and the filform entered into the control device 43 , the roller 12 can be moved by actuating the electric motors 34 . The current positions are reported back to the control unit 43 by incremental rotary encoders. These encoders are part of the ser motors 7 , 8 , 41 and 42 . Between the spindles 32 and 33 and the two servomotors 34 , an incremental rotary encoder 44 is shown by way of example separately.

Fig. 17 shows a cylindrical roller 12 which has a radial, axially parallel notch 45 in order to win reference for its rotation angle position. In the event that the roller 12 has a non-cylindrical peripheral portion, as shown in the previous examples, a displacement of the roller 12 during the rolling can be omitted; if necessary, it would only take place between the individual rolling steps.

The curve, according to which the roller 12 is shifted, 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 that runs synchronously with the belt feed.

With the device shown in Fig. 17 can also be made transversely to their longitudinal direction grooved metal strips or metal strips with another by continuously extending across the entire width of the metal strip 16 profile ago if the roller 12 extend with a corresponding in the circumferential direction Profiling is provided.

Fig. 18 shows a comparison with FIGS. 1 to 4 modified embodiment. It differs from the exemplary embodiment in FIGS . 1 to 4 in that, instead of reels 5 and 6, a return device 52 working with pliers and a pulling device 53 working with pliers are provided. This embodiment is particularly suitable for shorter or thicker metal strips 16 , which cannot be wound so easily.

The working with pliers return device 52 and pulling device 53 have a carriage 56 , 57 , which by means of a drive motor designed as a servo motor 54 , 55 in a horizontal direction of the roll gap 13 can be approximated and removed from it. For this purpose, a dovetail-shaped tongue 58 is provided on the underside of the slide 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 , the carriages 56 , 57 are precisely guided horizontally. Other types of guidance are possible. On each carriage 56 , 57 there is a rigidly attached to the carriage lower jaw 63 and an upper jaw 64 , the stand from the lower jaw 63 is variable, preferably by means of a Druckmit telzylinders. The metal strip 16 is passed between the two jaws 63 and 64 , which form a pair of pliers or clamps, and clamped as required. The return device 52 and the pulling device 53 , which are designed as tongs feed devices, can be actuated and shifted individually but also together in a coordinated manner. 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 return device 52 and the pulling device 53 .

The return device 52 and the pulling device 53 are, as shown in FIG. 18, arranged adjacent to the roll gap 13 . On the outlet side of the roll gap 13 , the device 19 for extracting rolling oil is arranged in the rolling direction following the pulling device 53 , to which a thickness measuring device 51 is connected, which detects and reports the thickness of the rolled metal strip 16 with a probe or without contact, so that in the event of deviations from the desired thickness, intervention can be made in order to change the height of the roll gap 13 in a suitable manner.

Fig. 19 shows a producible by the invention metal strip 16, which has been profiled with the formation of transverse grooves 74 in the underside of the metal strip 16 and of transverse grooves 75 and 76 in the top of the Metallban of 16 by the inventive method on both sides, wherein in a first pass the grooves 74 in the underside and in a second pass, after turning the metal band, the grooves 75 and 76 in the top of the metal band 16 were formed. However, the order of the procedural steps is not mandatory. In the example shown, the grooves 74 are narrower than the overlying grooves 75 , which alternate with the narrower grooves 76 in the top of the metal strip 16 . A special feature is that the wider grooves 75 continue into rectangular niches 77 , the depth of which is measured in the longitudinal direction 79 of the band 16 is relatively small, so that the displacement of the material from the niches can be controlled.

The metal strip shown in FIG. 20, which can be produced according to the invention, differs from the metal strip shown in FIG. 19 in that instead of rectangular niches 77, arc-shaped niches 78 have been produced.

The invention not only allows the production of metal strips with grooves which expand into rectangular or arc-shaped niches, as shown in FIGS. 19 and 20, but also enables recesses 80 in a metal strip 16 one behind the other and / or side by side shape which have a closed border, z. B. triangular, rectangular or circular umran det, as shown in Fig. 21. Other shapes are possible. In the example shown in FIG. 20, the depressions 80 are delimited by peripheral walls which run at right angles or almost at right angles to the plate 67 . The circumferential walls of the depressions 80 can, however, also run obliquely to the plate 67 , in such a way that the depressions widen from the bottom toward the top of the metal strip 16 .

Such depressions 80 can be formed by moving the metal strip 16 through the gap between the work roll 12 and a plate 67 , which on its upper side has bumps 81 complementary to the depressions 80 , which are shown schematically in FIGS . 3a and 4a ,

LIST OF REFERENCE NUMBERS

1

foundation

2

rolling mill

3

recording device

4

recording device

5

Reel as a return device

6

Reel as a pulling device

7

Drive motor (servo motor)

8th

Drive motor (servo motor)

9

Installation part for work rolls

10

Installation part for back-up rolls

12

Roller (work roller)

13

nip

14

supporting roll

15

supporting roll

16

Tape, especially metal tape

17

Guide roll

18

Guide roll

19

Device for extracting rolling oil

20

roll neck

21

roll neck

22

Roll neck bearings (roller bearings)

23

gimbal

24

propeller shaft

25

roll neck

26

Roll neck bearings (roller bearings)

27

bearing shell

28

traverse

29

threaded rod

30

Disc springs

31

mother

32

spindle

33

spindle

34

Electric motor, especially servo motor

34

a subordinate gear

35

profiled peripheral section

36

cylindrical peripheral portion

37

cutout

38

cutout

39

cutout

40

profiled peripheral section

41

Electric motor, especially servo motor

42

Electric motor, especially servo motor

43

electronic control unit

44

encoders

45

incision

48

transmission

49

wave

50

gear

51

Thickness Gauge

52

Return device designed as a tong feed device

53

pulling device designed as a tong feed device

54

Drive motor for

52

55

Drive motor for

53

56

carriage

57

carriage

58

feather

59

fury

60

groove

61

extension part

62

extension part

63

lower jaw of a pair of pliers

64

upper jaw of a pair of pliers

65

bearing body

66

brackets

67

plate

69

pot

70

cover

71

Bullet

72

feather

73

adjustment

74

Grooves in the bottom of

16

75

Grooves in the top of

16

76

Grooves in the top of

16

77

Niches in

75

78

Niches in

75

79

Longitudinal direction of

16

80

deepening

81

cusp

82

rack

83

sprocket

84

Disc springs

Claims (75)

1. A method for producing a strip-shaped primary material made of metal, which is profiled on one side or on both sides in successive sections, by rolling a metal strip in one or more rolling steps, by carrying out the following process steps:

• a) tensioning the metal strip ( 16 ),
• b) positioning the metal strip ( 16 ) in a roll gap ( 13 ) which is delimited by a roll ( 12 ) and by a movable plate ( 67 ), relative to the roll ( 12 ),
• c) positioning the plate ( 67 ) relative to the roller ( 12 ),

wherein steps (b) and (c) can be carried out successively or simultaneously or in another manner overlapping in time or in reverse order and step (c) can also take place before step (a),

• a) piercing into the metal strip ( 16 ) with the roller ( 12 ) by reducing the distance between the lateral surface of the roller ( 12 ) from the metal strip ( 16 ), the metal strip ( 16 ) being kept at rest or at most during the start of the piercing moved so slowly and the roller ( 12 ) is not rotated or at most so slowly that the metal strip ( 16 ) in the roller gap ( 13 ) remains under tension,
• b) rolling a section of the metal strip ( 16 ) in the roll gap ( 13 ), for which purpose the roller ( 12 ) is rotated and the plate ( 67 ) is moved in a straight line synchronously therewith or is carried along,
• c) releasing the metal strip ( 16 ) by opening the roll gap ( 13 ),

wherein steps (b) to (f) are repeated for each section of the metal strip ( 16 ) to be profiled. 2. The method according to claim 1, characterized in that the metal strip ( 16 ) is profiled only on one side. 3. The method according to claim 1, characterized in that the metal strip ( 16 ) is first profiled only on one side and then turned so that its profiled side of the plate ( 67 ) faces, and that the metal strip ( 16 ) thereafter on it other side is profiled. 4. The method according to claim 3, characterized in that after the professional lieren one side of the metal strip ( 16 ), the plate ( 67 ) is exchanged for such a plate which has a profile which has already been rolled into the metal strip ( 16 ) Complementary profile corresponds. 5. The method according to any one of the preceding claims, characterized in that a flat plate ( 67 ) is used when the metal strip ( 16 ) is profiled only on one side or initially only on one side. 6. The method according to any one of the preceding claims, characterized in that in the metal strip ( 16 ) recesses ( 80 ) are formed with a closed border, for which purpose such a plate is used as plate ( 67 ), which to the recesses ( 80 ) has complementary bumps ( 81 ). 7. The method according to claim 6, characterized in that simultaneously with the formation of the recesses ( 80 ) by the action of the roller ( 12 ), which is opposite the plate ( 67 ) on the metal strip ( 16 ), a moderate reduction in the thickness of the metal strip ( 16 ) is brought about overall. 8. The method according to claim 7, characterized in that the moderate Ver reduction in the thickness of the metal strip ( 16 ) is approximately 10% of its previous thickness. 9. The method according to claim 6, 7 or 8, characterized in that the recesses ( 80 ) are formed in several steps and the slope of the peripheral wall of the recesses ( 80 ) increases from step to step. 10. The method according to any one of the preceding claims, characterized in that the tensile stress in the metal strip ( 16 ) is kept constant during piercing and during rolling. 11. The method according to any one of the preceding claims, characterized in that when performing several rolling steps for profiling the metal strip ( 16 ) in the sections provided, the method steps (b) to (e) are repeated and for this purpose after opening of the roll gap ( 13 ) the metal strip ( 16 ) is retrieved and is rolled once more by the action of the same roll ( 12 ) in the roll gap ( 13 ) in the section that is retrieved. 12. The method according to any one of the preceding claims, characterized in that the metal strip ( 16 ) is not rolled during the retrieval. 13. The method according to any one of claims 1 to 11, characterized in that the metal strip ( 16 ) is rolled even during the retrieval. 14. The method according to any one of the preceding claims, characterized in that the plate ( 67 ) is floating. 15. The method according to any one of the preceding claims, characterized in that the roller ( 12 ) limits the roll gap ( 13 ) from above and that the plate ( 67 ) lies horizontally and is supported by a support roller ( 15 ). 16. The method according to any one of the preceding claims, characterized in that the plate ( 67 ) on both sides of the roll gap ( 13 ) is supported. 17. The method according to claim 15 or 16, characterized in that the plate ( 67 ) on both sides of the roll gap ( 13 ) by rolling elements ( 71 ) is supported un. 18. The method according to claim 1, 2 or 3, characterized in that the surface of the plate ( 67 ) facing the roller ( 12 ) is flat. 19. The method according to any one of the preceding claims, characterized in that the plate ( 67 ) is moved during rolling in that it is carried by driving on the roller ( 12 ) and / or the metal strip ( 16 ). 20. The method according to any one of claims 15 to 17, characterized in that the plate ( 67 ) is moved in that it is carried along by driving its support roller ( 15 ). 21. The method according to any one of the preceding claims, characterized in that the metal strip ( 16 ) is retrieved by a length which is shorter than the circumference of the roller ( 12 ). 22. The method according to any one of the preceding claims, characterized in that the metal strip ( 15 ) is equalized by the rolling at the same time. 23. The method according to any one of the preceding claims, characterized in that with the roller ( 12 ) in the sections of the metal strip ( 16 ) a profile is rolled, which extends over the entire width of the metal strip ( 16 ), so that the Metal strip ( 16 ) has a changing thickness over its length. 24. The method according to claim 23, characterized in that a periodically repeating profile is rolled into the metal strip ( 16 ). 25. The method according to any one of the preceding claims, characterized in that the roller ( 12 ), the plate ( 57 ) and the metal strip ( 15 ) in the rolling steps are synchronized and accelerated and braked to the same extent. 26. The method according to any one of the preceding claims, characterized in that for producing a strip-shaped material with a selected profile, which recurs in successive sections of the material, the metal strip ( 16 ) with its sections to be profiled repeatedly in steps of predetermined lengths the roll gap ( 13 ) and the height of the roll gap ( 13 ) is reduced from roll step to roll step until the desired depth of the selected profile of the primary material is reached in the relevant sections of the metal strip ( 16 ). 27. The method according to any one of the preceding claims, characterized in that the metal strip ( 16 ) is reduced in its thickness in a first rolling step, but is not yet profiled. 28. The method according to claim 27, characterized in that the metal strip ( 16 ) is leveled in the first rolling step. 29. The method according to claim 27 or 28, characterized in that one or more profiling rolling steps in one and densel ben roll gap ( 13 ) follow on the reduction rolling step. 30. The method according to claim 27, 28 or 29, characterized in that the Length (L2) of the reducing rolling step in which the metal strip is given is also equalized if necessary, - taking into account that of following the stretching of the reduced section still taking place - greater than the length (L1) of the next profiling roll step is. 31. The method according to claim 30, characterized in that the metal strip ( 16 ) is retrieved after the reducing rolling step by a length which is less than the length (L2) of the reducing rolling step and greater than the length (L1) of the next profiling rolling step in the same section of the metal strip ( 16 ). 32. The method according to any one of the preceding claims, characterized by the use of a roll stand ( 2 ) in which the roll ( 12 ) has in its lateral surface a profiled section ( 35 , 40 ) with a contour which together with the plate ( 67 ) limited the roll gap ( 13 ). 33. The method according to any one of the preceding claims, characterized in that the roller ( 12 ) has a cylindrical outer surface, which is preferably divided into segments with the same or different diameters. 34. The method according to any one of claims 1 to 29, characterized in
that before rolling a profile, the metal strip ( 16 ) in the roll gap ( 13 ) between the roll ( 12 ) and the plate ( 67 ) initially in steps of a length (L2) which does not include the length (L1) of the first roll forming step below, equalized with a moderate decrease in its thickness, then retrieved by a step of at least the length (L1) of the first roll forming step and at most the second length (L2) and then the profile is rolled into the section of the metal strip ( 16 ) that has been retrieved,
and that the roller ( 12 ) for leveling the metal strip ( 16 ) has a cylindrical peripheral portion ( 36 ) on its outer surface, which is separated from non-cylindrical contoured, profiled peripheral portions ( 35 , 40 ). 35. The method according to any one of the preceding claims, characterized in that during the rolling of the metal strip ( 16 ), the roller ( 12 ) of the roll stand ( 2 ) is moved to change the height of the roll gap ( 13 ). 36. The method according to claim 35, characterized in that the roller ( 12 ) is displaced by a servo drive. 37. The method according to claim 36, characterized in that one or two electric motors ( 34 ) or one or two short hydraulic cylinders are used for the servo drive. 38. The method according to any one of claims 35 to 37, characterized in that the displacement of the roller ( 12 ) takes place by means of a program-controlled drive, wherein in a programmable control unit ( 43 ) the profile to be generated in the respective rolling step as a control curve for the Relocation of the roller ( 12 ) effecting drive is stored. 39. The method according to any one of claims 35 to 38, characterized in that the roller ( 12 ) has an axially parallel cut ( 45 ). 40. The method according to any one of the preceding claims, characterized in that the roller ( 12 ) is driven stepwise and synchronously with the feed of the metal belt ( 16 ). 41. The method according to any one of the preceding claims, characterized in that in the outer surface of the roller ( 12 ) between the effective during rolling peripheral sections ( 35 , 36 , 40 ) a clearance ( 37 , 38 , 39 ) is provided, which extends over such a circumferential angle that the respectively following circumferential section effective during rolling ( 35 , 36 , 40 ) engages in the metal strip ( 16 ) only after the previous circumferential section effective during rolling has released the metal strip ( 16 ). 42. The 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 speed of rotation of the roller ( 12 ) and the circumferential speed of the reels ( 5 , 6 ) can be matched to one another, in particular in the phase of inserting the roller ( 12 ) into the metal strip ( 16 ). 43. The method according to any one of the preceding claims, characterized in that the insertion of the roller ( 12 ) at reduced speed of the roller ( 12 ) and accordingly at a lower feed speed of the metal strip ( 16 ) and that the movements are subsequently accelerated. 44. The method according to any one of claims 1 to 40, characterized in that the metal strip ( 16 ) is retrieved with a first pair of pliers (at 52). 45. The method according to claim 44, characterized in that the metal strip ( 16 ) with the first pliers (at 52) is also advanced for rolling. 46. The method according to claim 44 or 45, characterized in that the metal strip ( 16 ) is pulled during rolling with a second pair of pliers (at 53) which engages a section of the metal strip ( 16 ) which leaves the roll gap ( 13 ) , 47. The method according to any one of the preceding claims, characterized in that during the rolling as well as during the retrieval of the metal strip ( 16 ) a tensile stress is constantly maintained in this. 48. The method according to any one of the preceding claims, characterized in that a tension is constantly maintained in the metal strip ( 16 ) during the insertion of the roller ( 12 ). 49. 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 of objects that are intended to be punched ge from the primary material formed by rolling can be punched out horizontally. 50. Application of the method according to one of the preceding claims Bands made of plastic and based on bands made of a composite material a plastic or with a plastic as an essential component. 51. Device for producing a strip-shaped primary material, in particular made of metal, by rolling a strip ( 16 ), in particular according to the method according to claim 1 or claim 46,
with a roll stand ( 2 ) in which a roll ( 12 ) delimits a roll gap ( 13 ),
and with a on the inlet side of the roll gap ( 13 ) arranged Rückholvor direction ( 5 , 52 ) for the belt ( 16 ), wherein for the return device ( 5 , 52 ) to a drive motor ( 7 , 54 ) is provided, which a return of Band ( 16 ) in steps of a predetermined length enables, in particular a servo motor,
characterized in that the roll gap ( 13 ) is also delimited by a radially displaceable, the roller ( 12 ) facing plate ( 67 ) which is synchronous with the roller ( 12 ) and / or with the belt ( 16 ) in the predetermined movement Direction of the belt ( 16 ) in the roll gap ( 13 ) can be driven and can also be driven and retrieved independently of the belt ( 16 ). 52. Apparatus according to claim 51, characterized in that the plate ( 67 ) is arranged under the roller ( 12 ). 53. Apparatus according to claim 51 or 52, characterized in that the height of the roll gap ( 13 ) is variable. 54. Apparatus according to claim 51 for producing a band-shaped material as with a selected profile, which recurs in successive sections of the material, characterized in that the roller ( 12 ) and / or the plate ( 67 ) in the roll stand ( 2 ) during Rolls are controlled up and down shiftable, namely by a path determined by the selected profile depending on the advance of the belt ( 16 ). 55. Device according to one of claims 51 to 54, characterized in that the roller ( 12 ) has a cylindrical outer surface. 56. Apparatus according to claim 53 for producing a band-shaped material as with a profile which recurs in successive sections of the material before, characterized in that the roller ( 12 ) on its outer surface two or more than two successive in the circumferential direction, separate peripheral sections ( 35 , 36 , 40 ), which do not all match in their contours. 57. Device according to one of claims 51 to 56, in which the Rückholvor direction ( 5 ) for the band ( 16 ) is a first reel. 58. Device according to one of claims 51 to 56, in which the Rückholvor direction ( 52 ) for the band ( 16 ) is designed as a first tong feed device. 59. Device according to one of claims 51 to 58, in which on the outlet side of the roll gap ( 13 ) a pulling device ( 6 , 53 ) is provided for the strip-shaped primary material. 60. Apparatus according to claim 59, in which the pulling device ( 6 ) is a second reel for winding up the strip-shaped primary material. 61. Device according to claim 59, in which the pulling device ( 53 ) is designed as a second tong feed device. 62. The apparatus of claim 56, wherein the roller ( 12 ) has a cylindrical peripheral portion ( 36 ). 63. Device according to one of claims 51 to 62, in which the rolling stand ( 2 ) is designed as a leveling rolling mill. 64. Device according to one of claims 51 to 63, in which the drive motor ( 7 , 54 ) for the return device ( 5 , 52 ) provided on the inlet side of the roll gap ( 13 ) is an electric servomotor. 65. Device according to one of claims 59 to 61, in which the pulling device ( 6 , 53 ) provided on the outlet side of the roll gap ( 13 ) is driven by an electric servomotor ( 8 , 55 ). 66. Device according to one of claims 51 to 65, characterized in that the return device ( 5 , 52 ) is associated with a roller coupled to an incremental rotary encoder, which can be rotated by the belt ( 16 ) running over it. 67. Device according to one of claims 59 to 61 or 65, characterized in that the pulling device ( 6 , 53 ) is associated with a roller coupled to an incremental rotation, which can be rotated by the belt ( 16 ) running over it. 68. Device according to one of claims 51 to 67, in which the roller ( 12 ) and the plate ( 67 ) on their side facing away from the roller gap ( 13 ) are each acted upon by a supporting roller ( 14 , 15 ), the roller pin ( 25 ) of which are preferably preloaded in their roll neck bearings ( 26 ) to reduce their bearing play. 69. Device according to one of claims 62 to 65 in conjunction with claim 59, 60 or 61, in which the roller ( 12 ) is driven discontinuously, in such a way that when the belt ( 16 ) is advanced it is synchronous with that on the outlet side of the roll gap ( 13 ) provided pulling device ( 6 , 53 ) is driven, whereas it is temporarily at a standstill and / or is positioned by forward rotation or backward rotation when the return device ( 5 , 52 ) provided on the inlet side of the roll gap ( 13 ) for uprighting keep the tape tension and to retrieve the tape ( 16 ) is driven in reverse. 70. Device according to one of claims 62 to 69 in connection with claim 59, 60 or 61, in which the peripheral speed of the roller ( 12 ) and the speed of the pulling device ( 6 , 53 ), preferably also that of the return device ( 5 , 52 ) are arbitrarily controllable. 71. Apparatus according to claim 53 or 54, in which one or more servo drives are provided for moving the roller ( 12 ). 72. Device according to claim 71, in which the servo drives each comprise an electric motor ( 34 ) or one or two short hydraulic cylinders. 73. Apparatus according to claim 65, in which an electronic control device ( 43 ) is provided, in which the storage of the roller ( 12 ) required for an intended profile is stored as a curve, preferably di gitally, and that with this control device ( 43 ) the drive motors ( 7 , 8 ; 54 , 55 ) of the return device ( 5 , 52 ) and the pulling device ( 6 , 53 ), a servo motor ( 42 ) for rotating the roller ( 12 ) and one or more with an incremental encoder ( 44 ) coupled adjustment drives (for example consisting of spindles 32 and 33 and egg nem electric motor 34 ) for the roller ( 12 ), and that even with an existing support roller ( 15 ) of the plate ( 67 ) a servo motor is provided. 74. Device according to one of claims 51 to 73 in conjunction with claim 57 and claim 60, in which the direction of rotation of the roller ( 12 ) and the reels ( 5 , 6 ) is reversible for rolling in both directions. 75. Device according to one of claims 51 to 74, in which the roller ( 12 ) has an axially parallel cut ( 45 ).