EP1332011A1 - Procede de fabrication d'un produit de depart en forme de bande, notamment en metal, profile par sections successives, et dispositif y relatif - Google Patents

Procede de fabrication d'un produit de depart en forme de bande, notamment en metal, profile par sections successives, et dispositif y relatif

Info

Publication number
EP1332011A1
EP1332011A1 EP01982471A EP01982471A EP1332011A1 EP 1332011 A1 EP1332011 A1 EP 1332011A1 EP 01982471 A EP01982471 A EP 01982471A EP 01982471 A EP01982471 A EP 01982471A EP 1332011 A1 EP1332011 A1 EP 1332011A1
Authority
EP
European Patent Office
Prior art keywords
metal strip
roller
rolling
plate
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01982471A
Other languages
German (de)
English (en)
Other versions
EP1332011B1 (fr
Inventor
Hans-Jörg BAUDER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Wezel Firma
Original Assignee
CARL WEZEL Firma
HJB ROLLING MILL TECHNOLOGY GM
HJB Rolling Mill Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10056804A external-priority patent/DE10056804A1/de
Priority claimed from DE10134285A external-priority patent/DE10134285B8/de
Application filed by CARL WEZEL Firma, HJB ROLLING MILL TECHNOLOGY GM, HJB Rolling Mill Technology GmbH filed Critical CARL WEZEL Firma
Publication of EP1332011A1 publication Critical patent/EP1332011A1/fr
Application granted granted Critical
Publication of EP1332011B1 publication Critical patent/EP1332011B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H8/00—Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects, e.g. checkered sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/42—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for step-by-step or planetary rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/22—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
    • B21B31/24—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal by screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control
    • B21B37/54—Tension control; Compression control by drive motor control including coiler drive control, e.g. reversing mills

Definitions

  • the invention relates to a method for producing a strip-shaped primary material, in particular made of metal, which is profiled in successive sections, and a device therefor.
  • DE 19504711 C2 discloses a method for producing a strip-shaped primary material from metal by means of rolling a roll stand, which delimit a roll gap in which a metal strip is rolled in two or more than two rolling steps. It works in such a way that the metal strip is rolled repeatedly, for which purpose it continuously runs through the roll stand from start to finish, the working direction of which is then reversed, so that the metal strip then runs through the roll stand again to its full length, but now in reverse Direction. From DE-PS 104 875 it is known to roll a profile in a single step into strip or plate-shaped workpieces for the production of tubes.
  • DE 19704300 A1 discloses a similar method for producing profiled blanks, in particular body panels.
  • DE 19938966 C1 shows how a section-like profiled strip-shaped primary material with a uniformly high surface quality can be produced economically.
  • the metal strip is rolled in successive sections, which are shorter than the circumference of the two rolls, between the same two rolls in two or more than two rolling steps, for which purpose the metal strip is retrieved between two successive rolling steps and then the section that is retrieved of the metal strip is rolled again.
  • DE 199 38966 C1 discloses a roll stand with a first reel for the metal strip to be rolled, which is arranged on the inlet side of the roll gap, and with a second reel for winding up the strip-shaped primary material, on the outlet side of the roll gap, for which on the Provided on the inlet side of the roll nip is a drive motor which enables the metal strip to be retrieved in steps of a predeterminable length, in particular a servo motor.
  • the length of the steps by which the metal strip is retrieved can be controlled by an electronic drive control, in particular program-controlled Be adapted to requirements. With such a program control, the discontinuous drive of the rolls with forward turning, standstill and possibly with backward turning can be optimally adapted to the individual rolling task.
  • the present invention has for its object to show a way how a band-shaped semifinished product, which is to be profiled in sections by a rolling process, can be obtained with higher accuracy in the desired shape on the side facing away from the profiling roller.
  • a band-shaped semifinished product, which is to be profiled in sections only on one side is to be obtained with greater accuracy on the other side.
  • 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,
  • the metal strip is positioned relative to the roller in a roll gap which is delimited by a roller and by a movable plate,
  • steps (b) and (c) positioning the plate relative to the roller, wherein steps (b) and (c) can be carried out successively or simultaneously or overlapping one another in time or in reverse order in succession and step (c) can also take place before step (a) .
  • a “metal band” is also understood to mean a band which is not entirely made of metal but contains non-metallic components, e.g. oxidic, carbidic or ceramic components or a metalloid such as Grafit. 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. Tapes made from such materials are used as semi-finished products for the production of electrical contacts.
  • the metal strip is rolled in more than one rolling step in order to achieve larger stitch decreases and / or to achieve smaller dimensional deviations in the strip section to be profiled, then after the first Procedure in one section repeats steps (b) to (f) and for this purpose, after opening the roll gap in step (f), the metal strip is retrieved and the metal strip is rolled again in the roll gap by the action of the same roller in the section that is retrieved.
  • the tension in the belt is best kept constant at a preselected value throughout the process. This leads to greater positioning accuracy of the metal strip in the roll gap and to greater dimensional accuracy.
  • the roll is initially positioned in relation to its starting angle in a preselected reference position before each rolling cycle or before each rolling step in order to avoid that position errors add up.
  • Positioning the roller in a reference position is best done by turning the roller back and can be done before step (b), after step (b) or after step (c).
  • the size of the roll gap is preferably also preset.
  • the metal strip is formed in the roll gap between a roll and a plate which cooperates with it. If the metal strip is to be profiled only on one side, then the plate is flat in the area in which the metal strip of the plate lies during the forming. The plate is moved in a straight line during the rolling of a section of the metal strip, in synchronism with the roller with which the plate works. When the metal strip is retrieved, a movement of the plate synchronously with the roller and / or with the metal strip is not absolutely necessary, unless the metal strip would also be rolled during the retrieval, which can be the case in an embodiment of the method according to the invention.
  • the one side is first profiled according to the method according to the invention, then the metal strip is turned so that its profiled side faces the plate, and then is profiled the other side of the method according to the invention, wherein - depending on the profile shapes to be produced - it is particularly preferred to replace the plate with a plate which has a profile corresponding to the profile already rolled on one side of the metal strip, around the profile already profiled To be able to optimally support the side of the metal strip when profiling the other side. In this way, the desired profiles can be achieved with particularly high accuracy.
  • the metal strip When profiling on both sides, the metal strip is expediently first profiled on one side over its entire length, then turned and then profiled on the other side in one or more rolling steps in a further pass. If necessary, the profiling roller is also replaced. Instead of replacing the plate, it can be more advantageous if the metal strip is to be profiled on the second side at locations that lie above the locations at which depressions have already been rolled in on the first side of the metal ribbon Use a support roller with the largest possible diameter to support the metal strip if this is to be profiled on the second side.
  • the pass line of the rolled strip is best placed somewhat over the profile protruding from the plate or support roller.
  • This has the advantage that scratching of the metal strip during transport can be ruled out and vertical adjustment of the plate or the supporting roller with a particularly large diameter, which may be provided in its place, can be avoided. Otherwise the vertical adjustment would be necessary if the support roller with its segment supporting the metal strip or the plate with its profile supporting the profiled metal strip had to be reset to the starting position for a new roll pass.
  • belts can be produced by the method according to the invention, which are profiled in sections, preferably only on one side, and in which the action of the roller on one side of the Band unevenness on the other side of the band compared to the previous approach can be significantly reduced or even completely avoided.
  • the plate of the roller acting on the metal strip which is also known as the work roll, serves as an abutment. It absorbs the rolling forces and expediently introduces them into the stand of the roll stand, in which the work roll and expediently existing backup rolls are also stored.
  • the plate is preferably mounted in a floating manner, which allows easy, low-friction mobility in conjunction with reliable force application.
  • the roller limits the roll gap from above and that the plate lies horizontally under the roller and is supported by a backup roller, which in turn is mounted in the roll stand in the usual way.
  • the rolling forces can be transferred from the plate to the support roller and can be introduced into the stand of the roll stand in a known manner.
  • the plate In order to ensure that the plate is in a horizontal position, it must also be supported in addition to the support roller, preferably on both sides of the roll gap, whereby the load-bearing capacity of the support means can be smaller than that of the support roller, which is located directly below the work roller that works with the plate lies.
  • a floating mounting of the plate is advantageously achieved by supporting the plate with rolling elements.
  • These can be rolls or rollers, which best form a field on both sides of the roll gap, which supports the plate at a plurality of points 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, but can be designed to run freely. Particularly preferred as a rolling element are free-running balls on which the underside of the plate lies.
  • the plate can be driven directly, e.g. by means of a spur gear ring which is shrunk onto the support roller arranged under the plate and transmits its moment to the plate via a toothed rack attached to the plate.
  • the plate can also be driven by means of a hydraulic piston-cylinder unit or by means of a spindle driven by an electric motor, in particular with a low-friction and precise ball screw.
  • the plate is not driven directly during rolling, but only indirectly, in that it is carried along by driving the work roll and / or the metal strip. There is sufficient frictional engagement due to the rolling pressure occurring between the work roll and the plate.
  • the support roller which is arranged under the plate, is also driven to take the plate with it.
  • a great advantage of the invention is that it can be applied to other applications.
  • One application relates to the production of metal strips which have grooves which do not extend in the longitudinal direction from the beginning of the strip to the end of the strip, but instead extend from one longitudinal edge to the other longitudinal edge across the entire width and in the metal strip at intervals recur.
  • Such grooved metal strips can be used, for example, to produce contact springs or spiral-wound blades for electric motors, in particular for servo motors, by dividing the metal strips.
  • Advanced servomotors are getting faster and more accurate. This places increasing demands on the dimensional accuracy of the spiral helix blades in these motors.
  • 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 strip, one or more rolling passes are required.
  • the groove is milled into the metal strip using conventional technology, but the surface finish is not high. Milling grooves that extend across the metal band is difficult. Attempts have also been made in the prior art to produce grooved band-shaped semi-finished products by rolling a longitudinal groove in a plurality of pass passes into a metal strip. In this case, side webs are retained in the metal band on both sides of the groove, which limit the groove. Since the metal strip in the area of the groove is correspondingly elongated due to the material displacement during rolling, but not in the area of the side bars, the side bars must be stretched to compensate, e.g. with reels, which develop a strong traction. Even if one stretches the side bars, it is not possible to roll grooves whose depth exceeds approx.
  • the method is complex and does not lead to the desired accuracy, because the metal strip undergoes a warp with each roll pass, which leads to the groove becoming somewhat wider from roll pass to roll pass with increasing fluctuations.
  • the working methods described in DE-PS 104875 and DE 197 04 300 A1 also do not allow high dimensional accuracy.
  • step-by-step and section-wise rolling according to the invention, however, it is possible to roll generally profiled metal strips, in which the profile extends over the entire width of the metal strip, both with high dimensional accuracy and with a high surface quality, in particular if the discontinuous rolling method according to the invention is developed in such a way that the metal strip is rolled not only in one step but in each of the sections to be profiled in several steps, for which purpose the metal strip is retrieved after a rolling step and rolled again in the section already rolled.
  • Particularly high accuracies can be achieved if the metal strip is not only rolled in one direction and only retrieved in the opposite direction, but if it is rolled in both directions, also when retrieving it.
  • a particular advantage of the invention is that it can be used to roll profiles into strips which can be cut by machining processes such as e.g. cannot be produced at all by milling, namely grooves which extend transversely to the longitudinal direction of the metal strip and have edges which do not extend in a straight line from one edge to the other edge of the metal strip, but rather in pockets in the longitudinal direction of the metal strip or expand niches, which in turn have straight or arched edges.
  • Such grooves, which expand in pockets or niches can in any case be rolled by the method according to the invention if the pockets or niches do not widen the groove so much that there are problems with the displacement of the material from the pockets or niches to be formed.
  • Arched and oblique grooves can also be rolled into a metal strip using the discontinuous rolling method according to the invention.
  • depressions with a closed border in a metal strip it is possible to form depressions 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 shaped 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 peripheral wall running perpendicular or almost perpendicular to the plate or a peripheral wall running 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 in a flat depression.
  • the shaping of a profiled metal strip with depressions, which have a closed edge, according to the rolling method according to the invention has the essential advantage that the depressions do not have to be produced with process steps that are separate in terms of time and place, but are produced simultaneously in the roll gap between a roller and a plate can.
  • a plate with bumps can be used, which press into one side of the metal strip during the rolling process, displacing a corresponding amount of the metal to the opposite side of the metal strip, where it is rolled out by the roller, so that that of the respective recess opposite point of the belt surface is obtained.
  • the dimensional accuracy and the flatness of the surfaces that can be achieved according to the invention are better by a power of ten than in the conventional method.
  • the method according to the invention is particularly advantageous when forming depressions in a metal strip, if not only the material displaced by the shaping of the depressions is rolled out by the rolling process on the opposite side, but if at the same time a moderate reduction in the thickness of the metal strip is brought about, preferably in the order of 10% decrease in thickness. In this way, particularly high accuracy can be achieved.
  • the easiest way is to form depressions which are trough-like or have a peripheral wall which runs obliquely in such a way that the depression widens outwards from its base.
  • a depression with a steeper in particular with a vertical peripheral wall, it can be advantageous to do this in two or more than two steps, with a depression with a sloping peripheral wall, e.g. is formed at an angle of 45 ° and the circumferential wall is only formed steeper in a second step, e.g. almost 90 °.
  • the discontinuous multi-step rolling method according to the invention is particularly advantageous for the production of such profiled profile strips.
  • the plate opposite the driven roller can be repeatedly retrieved for repeated profile rolling.
  • the fitting line of the metal strip is preferably placed somewhat above the profile protruding upward from the plate, which is present during profile rolling should press into the metal band.
  • the invention is particularly suitable for rolling a regularly recurring profile discontinuously into a metal strip;
  • a metal strip can be used to share the same mass parts, such as, for example, spiral helix lamellae or contact springs for electrical purposes, by dividing the metal strip gain high accuracy.
  • the metal strip is expediently cut by stamping.
  • the method according to the invention can advantageously also be applied to plated strips and strips to be plated, in which the sheets to be plated are at different heights after the rolling according to the invention.
  • Profiled strips with deep-lying plating cannot be produced by known roll plating processes by rolling in the longitudinal direction of the strip, because with larger degrees of deformation, in particular with more than 50% deformation, the associated material displacement becomes a serious problem.
  • the strip-like primary material with a particularly high and uniform surface quality and with the smallest thickness tolerances, or to produce a primary material with the quality known from the prior art in greater lengths than before without changing the rollers.
  • the circumference of the rolls should be at least twice as long as the length of the sections that were retrieved, the section being retrieved being somewhat larger than that measured in the longitudinal direction of the band-shaped semi-finished product Dimension of the workpieces to be punched out of the semi-finished product, so that the unavoidable punching waste can be taken into account.
  • the metal strip is rolled not only in one direction, but sometimes in one direction and sometimes in the other direction, one can also proceed, for example, by rolling the metal strip back and forth a few times between the same sections of the roller and the plate, and performs the last rolling step between a peripheral portion of the roller and a portion of the plate, which until then has been for a smaller number of rolling steps were used and therefore have a better surface quality, so that in the last rolling step they give the metal strip a surface with an equally good quality.
  • the number of rolling steps used to act on one and the same section of the metal strip is matched to the desired stitch reduction and surface quality of the primary material to be produced.
  • the accuracy and surface quality that can be achieved according to the invention are greater than when milling, even greater than if the metal strip is repeatedly rolled to full length, as in the prior art, to produce a longitudinal groove, which is only due to the uneven elongation that occurs thickness reductions of up to 10% is possible.
  • each rolling step begins from the standstill of the metal strip, the roller and the plate or at such a low speed that a tension existing in the metal strip is maintained during the insertion of the roller into the metal strip can be. Therefore, in the initial phase of each rolling step, the elongation of the metal strip resulting from the engagement of the roller in the metal strip does not occur suddenly, unlike in a continuous profile rolling process, but so gently that the tensile stress important for the dimensional accuracy of the profile is retained in the metal strip, eg by regulating the drive of reels, which are provided for maintaining the tension.
  • the acceleration and braking of the roller and the metal strip during rolling are preferably carried out to the same extent and synchronously. It is best to maintain a constant tension in the metal strip when piercing, and this is also best maintained during rolling.
  • the roll can have a cylindrical casing or a profiled casing, which is optionally subdivided into segments with the same or different diameters.
  • a profile can be rolled into the metal strip with a cylindrical jacket, in particular by changing the height of the roll gap during the rolling by changing the roll.
  • the rolling steps are advantageously chosen to be shorter than half the circumference of the roller.
  • the profile extends only over part of the circumference of the roller.
  • the remaining part of the outer surface of the roller can be cylindrical; this makes it possible, with the cylindrical section of the roll surface, not to profile the respective section of the metal strip in a first rolling step, but to equalize it, thereby increasing the dimensional accuracy of the rolled strip.
  • Nibs for fountain pens have a different thickness over their length. Nibs are typically 0.2 mm thick in the rear area. The nib becomes thicker towards the tip in order to finally reach a maximum of about 0.6 mm at the nib. It is known to produce nibs in that a metal strip is first provided with a corresponding longitudinal profile by rolling in sections, namely in steps whose length corresponds to the length of the later nibs, which extends over the entire width of the metal strip. This profiled metal band is a raw material from which the nibs are later punched out and shaped into the desired curved shape.
  • the upper roller in the circumferential direction with an empirically determined contour of two rollers that delimit a nip and are supported in a roll stand, which contour is complementary to the intended course of the thickness of the nibs.
  • the lateral surface of the upper roller is so close to its axis that there is no engagement with the metal strip in the roll gap in this area.
  • the metal strip is unwound from a first reel and the profiled metal strip emerging from the roll gap is rolled up from a second reel. Since the feed of the metal strip is effected by the two rollers, there is inevitably a certain loose length of the metal strip between them and the second winding reel, which makes it necessary in the prior art to provide a strip loop with a strip tensioning device, which creates a balance between the discontinuous Belt feed through the rollers and the continuous winding movement of the second reel. This is associated with some equipment, which is disadvantageous.
  • Profiled strips produced in the known manner have undesirable dimensional deviations.
  • the present invention shows a way in which a profiled strip-shaped primary material e.g. for nibs with greater accuracy.
  • the flat, level support of the metal strip in connection with a plunge of the roller, which is best not to rotate at first, into the stationary metal strip makes a significant contribution.
  • the roller In order to effect the piercing, the roller is moved against the plate which is still at rest.
  • a further contribution is made in that the strip tension can be maintained in all phases of the rolling process.
  • This is different in the known method, because there the rollers continuously rotate at a constant speed, as a result of which the piercing of the profiled roller and thus the belt feed suddenly begin and are also ended again.
  • a uniform tensile force in the metal strip during profiling which would be favorable for a uniform work result with high dimensional accuracy, is not possible with the known method of working.
  • the metal strip is rolled in several rolling steps in the case of higher requirements for accuracy or in the case of large passes, until the depth of the desired profile of the primary material is reached.
  • the metal strip is retrieved between two successive rolling steps and then the retrieved section of the metal strip between the roller and the plate is rolled again.
  • the relevant section of the strip can also be rolled again when it is retrieved. Only when in a section of the metal strip to be profiled in one or more rolling steps and possibly after one or more Return steps the desired profile has been rolled, for profiling the next strip section of the metal strip, this next strip section is conveyed into the roll gap, exactly positioned in its longitudinal direction and then processed in the roll gap.
  • Nibs especially in the later shaft area.
  • the profile of the metal strip can be created in several rolling passes, different types of rolling such as leveling, pre-profiling, plating, masking and mirror-gloss rollers can be carried out in succession in different orders on the same section of the metal strip.
  • the versatility of the invention contributes to the fact that the metal strip does not have to be profiled in each rolling step, but can only be reduced in thickness uniformly in a first rolling step, for which purpose the roll also has a cylindrical section if it is not cylindrical anyway.
  • roller is profiled in the circumferential direction, then it is preferably designed so that it has successively circumferentially sections with different contours, which are separated from one another in particular by cutouts and, in connection with the preferred retrieval of the metal strip, repeated rolling of one and the same section of the metal strip allow.
  • 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.
  • a hydraulic adjustment system has the advantage of being faster and more precise.
  • 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 in one or more steps even with a cylindrical roller. It depends on the desired profile, how to choose the diameter of the roller and how to shift the roller relative to the plate depending on the belt feed.
  • the return device e.g. a first reel, from which the metal strip to be profiled is unwound, because it must be able to reproduce the length of the step by which the metal strip is returned with sufficient accuracy.
  • This is done by providing this first reel, expediently also the second reel pulling the metal strip, e.g. with a servo motor, which has an incremental rotary encoder, which enables precise definition of the desired step length when unwinding and also when winding up.
  • the stride length can be specified even more precisely if the reels are provided with belt overflow rollers which are coupled to an incremental rotary encoder, which serves as an actual value transmitter in the belt position control.
  • the width of the metal strip can be such that a single profiled part, e.g. a single profiled nib can be punched out.
  • the cost-effectiveness of the method and a rolling stand operating according to the method can easily be multiplied if larger strips are processed which are so wide that two or more than two adjacent nibs or similar profiled objects can be formed from each profiled section of the primary material.
  • the metal strip is leveled before the profile is rolled.
  • Leveling is understood to mean rolling the metal strip in a roll stand with a highly constant roll gap, as a result of which the thickness fluctuations of the metal strip are reduced.
  • Roll stands with two work rolls for leveling are known from DE 2541 402 C2, to which reference is made for further details.
  • a highly constant roll gap is formed in that the pretensioning forces, which are extended outward beyond the roll neck bearings, are exerted by two support rolls, one of which supports the plate from below and the other supports the work roll from above, perpendicular to the roll axes away from the rolling stock, which can be oriented perpendicularly and preferably act in a line of action which deviates from the roll axis plane by the roll angle and passes through the incoming metal strip. In this way, the work cycle of the rolls in the roll neck bearings is reduced.
  • the leveling and profiling are carried out in one and the same roll stand, for which purpose the metal strip is not only moved in the feed direction through the roll gap in the working steps serving for profiling. Rather, the metal strip is first leveled in steps which - taking into account the stretching of the leveled section which still occurs during the subsequent profiling - are at least as long as the step during profiling, with a moderate decrease in its thickness.
  • the strip is then retrieved by one step of at least the length required for profiling and at most the length advanced during leveling, and the profile is then rolled into the section of the metal strip that has been retrieved.
  • the roll In a roll stand in which the work roll is profiled and has a circumferential section with the contour which is matched to the desired course of the thickness, for example a pen, which is to be produced from the metal strip, the roll additionally has one for this purpose cylindrical peripheral portion, which is separated from the peripheral portion having the contour (claim 25).
  • the leveling step is carried out with the cylindrical peripheral section.
  • the cylindrical peripheral section is chosen so long with regard to its determination and taking into account the elongation of the metal strip that occurs during rolling that the leveled section of the metal strip is 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 can maintain a distance from the beginning and end of the equalized section.
  • the roll stand used for profiling is at the same time designed as a roll stand for leveling and equipped with a step-by-step forward and backward strip feed.
  • Nibs can be reduced to less than + 2 ⁇ m, e.g. can be reduced to + 1 ⁇ m in a single nib, especially in the later area of the nib.
  • the work roll used for profiling may have to be modified in this by providing it with a suitable cylindrical section, a work roll has to be exchanged for a plate and the roll journals have to be preloaded by two support rolls to reduce the bearing play - NEN, for example in one of the ways disclosed in DE-2541 402 C2.
  • means are required which not only allow the metal strip to be pushed forward step by step, but also step by step to bring the metal strip back in steps which are approximately as long as the steps in leveling.
  • At least a first reel, from which the metal strip to be profiled is unwound, is provided with an electric motor which can be controlled with sufficient accuracy in steps of the desired length and reversed in the direction of rotation.
  • This is preferably done with a servo motor, which has an incremental rotary encoder that enables precise definition of the desired step length during unwinding and rewinding, or by means of two servo controllers with load cells on deflection rollers for the metal strip, as actual value transmitters for reels that unwind and wind up the metal strip and realize the tensile stress in the metal strip or alternatively be held in position control by control electronics.
  • a second reel, which winds up the profiled metal strip, is preferably also provided with such a servo motor.
  • Another advantage of driving the reels with servo motors is that the belt feed and the drive of the roller can be coordinated so well that, unlike in the prior art, instead of a continuous drive of the roller, a discontinuous roller drive can take place.
  • the speed at which the profiled roller punctures the metal strip can be matched to the strip feed speed in such a way that there is no abrupt acceleration of the metal strip when plunging.
  • the profiled roller can first be inserted into the metal strip at rest or with slow strip feed and with slow roller rotation, followed by an accelerated strip feed movement and roller rotation. This is particularly advantageous for achieving small dimensional tolerances.
  • the strip feed can be adjusted very precisely to the length and position of the profiled strip sections and to the roll rotation, preferably also to the vertical displacement of the strip, by means of a programmable electronic control unit Roller, in particular in the case of a roller gap delimited by a cylindrical roller shell or roller shell section, to change the height thereof and thereby to produce a specific profile.
  • the metal strip can be retrieved not only by a reel arranged on the inlet side of the roll gap, but also by a return device designed as a plier feed device. This embodiment is also particularly suitable for processing shorter or stiffer belts. If the return device is a tong feed device, it can also be used to advance the metal strip and to feed it to the roll gap.
  • the sequence control of the method which links the control of the belt position, the rotational angle position of the roller and the position of the roller, depends on the return device.
  • a tong feed device can also be used as a pulling device for the strip emerging from the roll gap during rolling.
  • This embodiment is also particularly suitable for processing shorter or stiffer tapes.
  • the quality of the strip-shaped primary material that is produced is increased if a defined tension is maintained in the piercing as well as in the rolling as well as in the retrieval of the strip, in particular by means of a strip tension control with two servo regulators and load cells on the deflection rollers as an actual value transmitter for the Reel, the thinner the metal strip, the stronger this favorable influence. But even in the case of thicker strips, it is advantageous to keep the strip under tension and to guide it precisely during the piercing and during rolling and retrieval between the return device and the pulling device by moving these two devices in a coordinated manner.
  • the optimal strip tension can be maintained in all phases of a rolling step, in particular also in the critical phase of the insertion of a profiled roller into the metal strip, because because each rolling step begins due to the nature of the discontinuous multi-step rolling method according to the invention from the standstill of the roller, the plate and the metal strip, the profiled roller does not suddenly engage in the metal strip, but so gentle that in this critical phase of inserting the profiled roller into the metal strip and in the entire rolling step, the tensile force of the strip tensioning device, for example the reels, can be regulated to an optimum constant value for the respective strip.
  • the reels and the roller are advantageously synchronized with the respective drive motors when the metal strip and the roller are accelerating and braking, and are accelerated or braked to the same extent.
  • the optimal preload with which the bearing play of the back-up rolls is clamped away can be determined empirically for the respective application and then remains constant for the application.
  • the optimization is preferably carried out in such a way that the elongation of the roll stand that occurs in the respective application is determined during leveling and is compensated for by appropriate adjustment of the prestress.
  • the device specified in claim 51 for producing a strip-shaped primary material from metal by rolling a metal strip according to the method according to the invention has a roll stand in which a roll and a plate which can be moved in a straight line and which faces the roll delimit a roll gap, and one on the inlet side of the Rolling gap arranged return device for the metal strip, for which a drive motor is provided which enables the metal strip to be returned in steps of a predeterminable length, in particular a servo motor, the plate being synchronized with the roller and / or with the metal strip in the predetermined direction of movement, which the metal strip has in the roll gap, can be driven and can also be driven and retrieved independently of the metal strip.
  • the plate can be driven and retrieved independently of the metal strip in order to be able to retrieve the plate in a selected section of the metal strip after the completion of a rolling process, without having to retrieve the metal strip, so that the metal strip can be rolled in a subsequent section.
  • the plate can be driven directly, but preferably takes place indirectly, in that the plate is taken along by the driven roller and the driven metal strip during rolling, preferably also by a driven support roller arranged under the plate and supporting the plate.
  • the latter can also retrieve the plate between two successive rolling steps; for this purpose, the frictional engagement between the support roller and the plate lying on it is sufficient, the frictional force caused by the weight of the plate being able to be increased if necessary by pressing elements which additionally press the plate against the support roller.
  • pressing elements can be rollers, for example, which are pressed onto the plate by pressure medium cylinders.
  • Profiled metal parts which are obtained by cutting metal strips and are formed in sections by only one rolling step of the discontinuous rolling process, find e.g. used in the automotive industry and can replace metal parts that were previously manufactured using welding processes.
  • the invention is applicable not only to the rolling of strips of metal in the sense in which the term "metal strip” is used here, but also to strips of plastic and to strips made of a composite material based on plastic, for example a plastic with metallic or mineral or ceramic fillers, or metallized plastic tapes as well as metal tapes coated with plastic. Further features and advantages of the invention result from the attached schematic drawings, which show exemplary embodiments of the invention.
  • FIG. 1 shows a partially sectioned side view of a machine according to the invention
  • FIG. 2 shows a partially sectioned front view of the machine
  • FIG. 3 shows an enlarged section of the machine compared to FIG. 1, namely the main part of the roll stand of the machine
  • FIG. 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,
  • FIGS. 5-10 show a flow diagram of a first working method that can be carried out with the machine
  • FIGS. 11-16 show a flow diagram of a second working method that can be carried out with the machine
  • 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 a representation corresponding to FIG. 1,
  • FIG. 19 shows a metal strip which can be produced by the invention and has grooves which widen into rectangular niches
  • FIG. 20 shows a metal strip which can be produced by the invention and has grooves which widen in an arcuate recess
  • FIG. 21 shows a metal strip which can be produced by the invention with grooves which expand into rectangular niches and with depressions which have a closed border.
  • 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 a receiving device 3 and 4 for a reel 5 and 6 is fastened, which is supported by a Drive motor 7, 8 designed as an electric servo motor can be driven.
  • a work roll 12 hereinafter simply referred to as a roll, is mounted in the lateral built-in parts 9 of the roll stand and, together with a flat plate 67 arranged underneath it, delimits a roll gap 13.
  • a support roller 14 or 15 is installed in built-in parts 10 and 10a, which is larger in diameter than the roller 12.
  • the built-in parts 9, 9a of the work roll 12 are each in a cutout of the built-in parts 10 , 10a of the support rollers 14, 15 are arranged.
  • a metal strip 16 to be processed 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 winds up the metal strip 16 processed in the roll stand 2.
  • a device 19 for extracting rolling oil in which the metal strip 16 is cleaned of the rolling oil.
  • the structure of the roll stand 2 is shown in more detail in FIGS. 3 and 4. It follows from this that the roller 12, the diameter of which is only about 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 designed as roller bearings.
  • a roller pin 21 of the roller 12 is extended beyond its roller pin bearing 22 and is formed as part of a gimbal 23 which enables the roller 12 to be driven 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. It drives the roller 12 and the lower backup 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 roller journals 25 which are mounted in roller journal bearings 26 of the lateral built-in parts 10 and 10a which are designed as roller bearings.
  • the roller journals 25 are extended beyond the roller journal bearings 26 and are inserted in bearing shells 27, of which the bearing shells of the lower support roller 14 are braced with the foundation 1, while the bearing shells
  • 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 ⁇ m.
  • the plate 67 is not only supported by the lower support roller 15, but also by two fields of ball bearings 65, one field on the inlet side of the roll gap 13 and one field on the outlet side of the roll gap 13 is arranged.
  • the ball bearings each consist of a pot 69, which is firmly closed by a spherical cover 70.
  • the cover 70 has a circular opening arranged in the center, through which a ball 71 arranged under the cover, the diameter of which is larger than the diameter of the central hole, engages with part of its surface.
  • the ball 71 is pressed against the spherical cover 70 by a spring 72 arranged in the pot 69. In this way, the ball 71 between the edge of the central opening of the cover 70 and the spring 72 is resilient and otherwise freely movable.
  • the ball bearings 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 in a springy and smooth manner, that is to say with low friction.
  • the ball bearings are arranged in brackets 66, which are attached to the roll stand 2 in an adjustable height. The height of the ball bearings 65 is adjusted so that the plate 67 presses the balls 71 slightly downwards 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 support roller 15 is adjustable in the vertical direction by means of an adjusting device 73 which works with wedges and which is designated between the two roller stand window beds and the two lower roller bearing bodies of the lower support roller 15.
  • the plate 67 can thus also be adjusted in the vertical direction.
  • 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, that is the rolling direction.
  • the toothed racks 82 mesh with two toothed rings 83, which are fastened laterally on the lower support roller 15, in particular by being shrunk onto the support roller 15.
  • the plate 67 can be driven very precisely by the lower support roller 15, which in turn is driven by the electric motor 41 is driven (figure 2).
  • the plate springs 84 compensate for a flattening of the support roller 15, which can be caused by the rolling forces.
  • 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 means of 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 corresponding direction, the required frictional engagement between the support roller 15 and the plate 67 being brought about by the weight of the plate 67. If the dead weight is not sufficient for a reliable frictional connection, the plate 67 can also be pressed against the support roller 15 by pressing rollers (not shown) onto the top of the plate 67 with the aid of pressure medium cylinders.
  • the required pre-tension of the roll stand 2 is generated with the aid 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 electric motor 34 arranged on the top of the roll stand 2 (see Figure 1) are driven.
  • both electric motors 34 have a drive shaft 49 designed as a pinion, the teeth of which each mesh with a gear wheel 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 processed is unwound from the first reel 5, passed through the roll gap 13, pulled up to the second reel 6 and fastened thereon.
  • the plate 67 has a flat top.
  • the roller 12 has a lateral surface (FIG. 5) with a profiled circumferential section 35, which has a length L1 as measured in the circumferential direction of the roller 12, and a cylindrical circumferential section 36, which has a length L2 as measured in the circumferential direction of the roller 12, both separated from one another two cutouts 37 and 38.
  • the cylindrical peripheral section 36 of the lateral surface has the greatest distance from the axis of the roller 12, the cutouts 37 and 38 have the smallest distance from the axis of the roller 12.
  • the profiled peripheral section 35 of the lateral surface has a contour whose The course in the circumferential direction is matched to the longitudinal course of the thickness of a workpiece, for example a pen, which is ultimately to be produced from the metal strip 16.
  • the plate 67 which supports the metal strip 16 during rolling, is only partially shown.
  • the processing of the metal strip 16 begins with the cylindrical circumferential portion 36 of the roller 12 penetrating into the metal strip stretched between the two reels 5 and 6, gently when the metal strip 16 is at a standstill and when the roller 12 is not rotating, at most at a slower rate low circumferential speed of the cylindrical circumferential section 36 adapted 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.
  • the stitch decreases of the metal strip are also exaggerated by the rolling process shown to make the rolling process clearer.
  • the cylindrical circumferential section 36 rolls on the metal strip 16 and typically reduces its thickness from 0.66 mm to 0.60 mm while simultaneously leveling the thickness.
  • the end of the leveling step is shown in FIG. 6.
  • the metal strip 16 now comes out of the engagement of the cylindrical peripheral portion 36 of the roller 12, which rotates a little further until the cutout 37 faces the metal strip 16.
  • the metal strip 16 is now brought back by reversing the two drive motors 7 and 8 designed as servomotors, namely by a length which is greater than L1 but less than L2; L2 is the length over which the metal strip 16 has been leveled.
  • the length by which the metal strip 16 is retrieved is chosen such that in the next step (FIG.
  • the upper roller 12 is displaced 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 position of the cutout 38 between the profiled circumferential section 35 and the cylindrical circumferential section 36 of the roller 12 and the positioning of the metal strip 16 in the roll gap 13 by means of the servomotors 7 and 8 of the reels 5 and 6 are coordinated with one another such that the next puncture of the cylindrical circumferential 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), with which a further leveling step, as shown in FIGS. 9 and 10, is initiated.
  • the servomotors 8 and 9 ensure that the tension in the metal strip 16 is as uniform as possible.
  • the greater accuracy that can be achieved by the leveling step is not important, it can be omitted and the metal strip in its relevant sections can be processed in each case by only one rolling step, namely by the section through which the section is profiled.
  • the exemplary embodiment shown in FIGS. 11 to 16 differs from the exemplary embodiment shown in FIGS. 5 to 10 in that the upper roller 12 has not only two circumferential sections but also three circumferential sections 35, 36 and 40, which are provided with cutouts 37 , 38 and 39 are separated from each other, acts on the metal strip 16 to be machined.
  • the roll stand 2 provided for this purpose 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 being exaggerated is.
  • the leveling step is not mandatory in this example either.
  • the peripheral section 36 is cylindrical, whereas the two peripheral sections 35 and 40 have a non-cylindrical profile. As in the example in FIGS. 5 to 10, the cylindrical circumferential section 36 is continuously at the greatest distance from the axis of the roller 12, which is advantageous when it comes to regrinding the cylindrical circumferential 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 particularity that after The leveling of 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.
  • the roller 12 is moved downwards by means of the spindles 32 and 33 in order to set the height of the roller gap 13 for the subsequent first roll forming operation, the beginning of which is shown in FIG. Figure 13 corresponds to Figure 7 and shows the piercing of the first non-cylindrical, profiled peripheral portion 35 of the roller 12.
  • Figure 14 corresponds to Figure 8 and shows the end of the first roll forming step.
  • Figure 16 shows the end of the second roll forming step.
  • the metal strip 16 becomes free again and can be positioned for leveling in the subsequent strip section, with simultaneous or subsequent adjustment of the height of the roll gap 13 provided for leveling.
  • the step shown in FIGS. 11 to 16 is then repeated - episode.
  • This method of operation is particularly suitable for the production of profiled sections in strips in which the desired stitch removal cannot be achieved or can only be achieved with difficulty or with the desired accuracy in a single profiling rolling step.
  • the invention can also be carried out with more than two roll forming steps.
  • the diameter of the roller 12 can be increased as required.
  • a reducing rolling step in which the thickness of the metal strip 16 is initially reduced uniformly 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 for the manufacture of other ribbon-shaped primary materials which are profiled in a sequence of regularly recurring sections over the entire width of the metal ribbon 16, for example for the production of a ribbon-shaped primary material for the manufacture of electrical conductor structures such.
  • Profiling stiffened sheet metal parts for the automotive industry can also be produced inexpensively and with high accuracy.
  • profiled rolls that can be produced with profiled rollers can be formed by the method according to the invention.
  • FIG. 17 shows in a schematic diagram how the servomotors 7 and 8 of the two reels 5 and 6, preferably also electric motors 41 and 42 also designed as servomotors, for driving the roller 12 and the backup roller 15, and the two electric motors 34, which are preferably also servomotors with a subordinate gear 34a and with which the rollers 12 can be displaced by means of the spindles 33 and 32, are linked to one another via a uniform electronic control device 43.
  • 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 to this 12 and the support roller 15 are rotated, stopped and, if necessary, turned back and, depending on the feed of the metal strip 16 and the profile shape entered in the control device 43, the roller 12 is displaced by actuating the electric motors 34.
  • the current positions are reported back to the control unit 43 by incremental rotary encoders. These rotary encoders are part of the servomotors 7, 8, 41 and 42. Between the spindles 32 and 33 and the two servomotors 34, an incremental rotary encoder 44 is shown separately as an example.
  • FIG. 17 shows a cylindrical roller 12 which has a radial, axially parallel notch 45 in order to obtain a reference for its angular position.
  • 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 then 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 disc running synchronously with the belt feed.
  • the device shown in FIG. 17 can also be used to produce metal strips or metal strips with a different profile extending transversely to their longitudinal direction if the roller 12 is provided with a corresponding profile that extends in the circumferential direction and extends continuously over the entire width of the metal strip 16.
  • FIG. 18 shows an exemplary embodiment modified compared to FIGS. 1 to 4. It differs from the exemplary embodiment in FIGS. 1 to 4 in that, instead of reels 5 and 6, pliers feed devices 52 and 53 are provided. This embodiment is particularly suitable for shorter or thicker metal strips 16, which cannot be wound so easily.
  • the tongs feed devices 52 and 53 have a slide 56, 57, which can be approached and removed from the roll gap 13 in the horizontal direction by means of a servo motor 54, 55.
  • a dovetail-shaped tongue 58 is provided on the underside of the carriage 56, 57, which engages in a matching dovetail-shaped groove 59, 60, which is formed on an attachment part 61, 62 of the roll stand 2.
  • the carriages 56, 57 are precisely guided horizontally. Other types of guidance are possible.
  • On each slide 56, 57 there is a lower jaw 63 rigidly attached to the slide and an upper jaw 64 whose distance from the lower jaw is variable, preferably by means of a pressure medium cylinder.
  • 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 Plier feed devices 52 and 53 can be actuated and moved individually, but also in concert with one another. In the second case, it is possible to maintain a defined tensile stress in the section of the metal strip 16 clamped between the two tongs feed devices 52 and 53, both during rolling and when retrieving.
  • the two tong feed devices 52 and 53 are arranged adjacent to the roll gap 13.
  • the device 19 for suction of rolling oil is arranged in the rolling direction following the tong feed device 53, to which a thickness measuring device 51 connects, 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, control or regulating action can be taken in order to change the height of the roll gap 13 in a suitable manner.
  • FIG. 19 shows a metal strip 16 that can be produced by the invention, which has been profiled on both sides with the formation of transverse grooves 74 in the underside of the metal strip 16 and of transverse grooves 75 and 76 in the upper side of the metal strip 16, using the method according to the invention in a first pass, the grooves 74 in the underside and in a second pass, after turning the metal strip, the grooves 75 and 76 were formed in the top of the metal strip 16.
  • the order of the process steps is not mandatory.
  • 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 invention not only allows the production of metal strips with grooves that expand into rectangular or arc-shaped niches, as shown in FIGS. 19 and 20, but also makes it possible to form depressions 80 in a metal strip 16 one after the other and / or next to one another have a closed border, e.g. are triangular, rectangular or circular, as shown in FIG. Other shapes are possible.
  • the depressions 80 are delimited by circumferential 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 expand from their base towards 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 has on its top complementary to the depressions 80 bumps 81, which are shown schematically in Figures 3a and 4a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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Abstract

L'invention concerne un procédé de fabrication d'un produit de départ en forme de bande, en métal, profilé par sections successives, d'un côté ou des deux côtés, par laminage d'une bande métallique, en une ou plusieurs phases de laminage, caractérisé en ce qu'il comprend les étapes suivantes : (a) mise en tension de la bande métallique (16), (b) positionnement de la bande métallique (16) dans une fente de laminage (13) délimitée par un cylindre (12) et par une plaque mobile (67), par rapport au cylindre (12), (c) positionnement de la plaque (67) par rapport au cylindre (12), les étapes (b) et (c) pouvant être effectuées successivement ou en même temps, ou par chevauchement dans le temps, ou successivement dans l'ordre inverse, et l'étape (c) pouvant également s'effectuer avant l'étape (a), (d) profilage en plongée dans la bande métallique (16) au moyen du cylindre (12), par diminution de la distance de la surface latérale du cylindre (12) par rapport à la bande métallique (16), ladite bande (16) étant maintenue au repos au moins au début du profilage ou, de toute façon, déplacée lentement, le cylindre ne tournant pas ou, du moins, étant entraîné lentement en rotation, de façon que la bande (16) demeure sous une tension de traction dans la fente de laminage (16), (e) laminage d'une section de la bande (16) dans la fente de laminage (13), le cylindre (12) étant entraîné en rotation et la plaque (67) se déplaçant linéairement en synchronisation ou étant entraînée, (f) libération de la bande (16) par ouverture de la fente de laminage (13), les étapes (b) à (f) pouvant être répétées pour chaque section à profiler de la bande métallique (16).
EP01982471A 2000-11-11 2001-11-08 Procede de fabrication d'un produit de depart en forme de bande, notamment en metal, profile par sections successives, et dispositif y relatif Expired - Lifetime EP1332011B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE10056804 2000-11-11
DE10056804A DE10056804A1 (de) 2000-04-07 2000-11-11 Verfahren zum Herstellen eines bandförmigen Vormaterials aus Metall, insbesondere eines solchen Vormaterials, welches in regelmäßig wiederkehrenden Abschnitten profiliert ist, und eine Vorrichtung dafür
DE10134285A DE10134285B8 (de) 2000-11-11 2001-07-14 Verfahren zum Herstellen eines bandförmigen Vormaterials, insbesondere aus Metall, welches in aufeinanderfolgenden Abschnitten profiliert ist, und eine Vorrichtung dafür
DE10134285 2001-07-14
PCT/EP2001/012927 WO2002038305A1 (fr) 2000-11-11 2001-11-08 Procede de fabrication d'un produit de depart en forme de bande, notamment en metal, profile par sections successives, et dispositif y relatif
US10/435,310 US20040221635A1 (en) 2000-11-11 2003-05-09 Method for producing strip-shaped input stock, especially from metal, which is profiled in subsequent sections, and corresponding device

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EP1332011A1 true EP1332011A1 (fr) 2003-08-06
EP1332011B1 EP1332011B1 (fr) 2005-06-15

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GB2444452A (en) * 2005-08-29 2008-06-04 Gcg Holdings Ltd Eccentric rotary Stamping apparatus and method of forming moving sheet metal
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US20040221635A1 (en) 2004-11-11
WO2002038305A1 (fr) 2002-05-16
AU2002214044A1 (en) 2002-05-21

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