EP2446979A1 - Method and device for straightening perforated metal sheets - Google Patents

Method and device for straightening perforated metal sheets Download PDF

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Publication number
EP2446979A1
EP2446979A1 EP11186009A EP11186009A EP2446979A1 EP 2446979 A1 EP2446979 A1 EP 2446979A1 EP 11186009 A EP11186009 A EP 11186009A EP 11186009 A EP11186009 A EP 11186009A EP 2446979 A1 EP2446979 A1 EP 2446979A1
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EP
European Patent Office
Prior art keywords
sheet
clamping
longitudinal
transverse direction
clamping device
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Granted
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EP11186009A
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German (de)
French (fr)
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EP2446979B1 (en
Inventor
Lutz-Stefan Dr.-Ing. Henrich
Volker Dipl.-Ing. Loth
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SCHNUTZ GMBH
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Maschinenfabrik - Fr W Schnutz & Co KG GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening

Definitions

  • the invention relates to a method and an apparatus for planarizing a rectangular sheet with a left and right longitudinal edge extending in the longitudinal direction of the sheet and a top and bottom edge extending in the transverse direction of the sheet metal.
  • the invention relates to a method and a device for planarizing perforated plates and expanded gratings.
  • hole shapes one distinguishes the round holes, Quadratlochung, hexagonal holes, oblong holes, ornamental perforation and the special perforation.
  • Expanded meshes are a special form of perforation and result from staggered cuts and stretching without loss of material.
  • the expanded metal may have, for example, diamond meshes, round-hole meshes, or square meshes for forming the holes.
  • Perforated sheets are used in numerous areas, for example in interior design for wall coverings, partitions and as design elements, in the air conditioning as sun protection panels and as heating / cooling sails, in the processing technology for screen coverings and in the field of acoustics, including noise barriers.
  • a perforated plate usually has on the left and right longitudinal side and the lower and upper end face on a non-perforated edge. This depends on the type of perforation, the sheet thickness, the tolerances, the outer dimensions of the sheet and the manufacturing tolerances during punching. Between the left and right longitudinal edge and the upper and lower end edge of the perforated plate is the hole field in which the holes are arranged in several rows, possibly with a hole offset to each other.
  • the method according to the invention relates primarily to such perforated sheets, it can also be used in conventional sheets delivered as sheets. This also applies to expanded mesh, which usually have no hole-free longitudinal edges.
  • the straightening rollers of the straightening roller machine can be bent in such a way that the edges and / or individual areas in the perforated field are additionally subjected to additional stretching.
  • the operator for the straightening roller machine selects the parameters for the wedge-shaped adjustment of the straightening rollers from the inlet to the outlet and the positioning systems transverse to the perforated plate based on their experience. The results of the plan directing are therefore not readily reproducible. As a result, the process of leveling often has to be repeated several times.
  • the invention is based on the object to provide a method and apparatus for planarizing a rectangular sheet, in particular a perforated plate, in which only a straightening process is required, avoid material cracks due to bends and unpredictable changes in length are avoided.
  • An apparatus for carrying out the method is characterized in that the device has at least one clamping device for clamping the left and right longitudinal edge of the sheet and / or at least one clamping device for clamping the upper and lower frontal edge of the sheet, at least each clamping device on a the two longitudinal edges is assigned a drive for stretching the sheet in the transverse direction and / or at least one clamping device is assigned to each clamping device at one of the two end edges a drive for stretching the sheet in the longitudinal direction and the device means for detecting the actual values of the extension of the sheet in transverse and / or longitudinal direction.
  • the clamping devices preferably comprise clamping jaws, which are specially adapted to the sheet to be stretched, in particular in its edge regions.
  • the waves in the longitudinal and transverse direction of the perforated sheet can be with the aid of an algorithm and taking into account the known yield strength of the metal used target values for the stretch for planarizing the sheet in the longitudinal and / or transverse direction calculate.
  • the sheet is stretched only in the plane of the sheet in the longitudinal and / or transverse direction by means of the clamping devices. This eliminates the previously required alternating bends of the sheet. As a result, material cracks and unpredictable changes in length of the perforated plates are avoided.
  • the actual values of the elongation in particular with the aid of displacement measuring systems, are recorded. As soon as the actual values have reached the desired values for the elongation previously calculated with the aid of the algorithm, the stretching is terminated by means of the clamping devices in the longitudinal and / or transverse direction of the sheet.
  • the perforated plate Before straightening, the perforated plate usually has longitudinal and transverse waves. To detect this ripple the actual stretching of the sheet is preceded by a measuring station for detecting the ripple of the sheet.
  • the at least one measuring device detects changes in the distance between one of the surfaces of the sheet and the measuring device while the measuring device and the sheet are moved relative to one another in a plane that is plane-parallel to a virtual planar bearing surface of the sheet.
  • the at least one measuring device is moved relative to the sheet in its longitudinal direction along a plurality of parallel measuring tracks. By a sufficient number of measurements along the measuring tracks results interpolated a longitudinal profile of the sheet. By detecting a plurality of parallel longitudinal profiles results in a three-dimensional image of the sheet.
  • the measuring device can also detect the changes in distance along a line parallel to the transverse direction of the sheet.
  • each clamping device can be made stationary on one of the edges, while the clamping device (s) the opposite edge is moved or at least partially moved.
  • the expenditure on equipment can be reduced.
  • At the left and right longer longitudinal edge preferably engage a plurality of clamping devices for the elimination of transverse waves.
  • clamping devices are provided with a drive for stretching the sheet in the transverse direction. At the end faces it is sufficient if the clamping device at one of the two end edges has a drive for stretching the sheet in the longitudinal direction.
  • drives for the clamping bar or arranged on the clamping bar jaws of the clamping devices are in particular linear actuators into consideration, which cause a translational movement of the clamping bar in the sheet metal plane. In consideration are hydraulic or pneumatic cylinders, electromechanical linear drives or threaded rod drives.
  • the displacement of a clamping bar can also be effected by means of an eccentric shaft acting on the clamping bar.
  • the clamping device may have a separate drive for closing the jaws and a separate drive for stretching the sheet in the longitudinal or transverse direction.
  • the drive to close and open the jaws can also serve to stretch the sheet in the longitudinal or transverse direction.
  • the clamping devices, the drives and the guides for the clamping devices are arranged on a frame of the device for planarizing.
  • This frame absorbs the forces required in stretching the sheet which deform the frame in proportion to the force. This deformation of the frame is preferably taken into account in the algorithm for calculating the nominal extension of the sheet.
  • the device has a arranged between the clamping devices transport device for the sheet.
  • This transport device is designed for example as a roller table.
  • the transport device serves the purpose of moving the sheet from an input to an output of the device. During stretching, the transport device serves as a support for the sheet.
  • the input of the device is preceded by a centering and feeding device for the sheet.
  • the centering and feeding device preferably has a plurality of guide rollers which are each rotatable about a vertical axis with respect to the surface of the sheet, wherein the distance between the vertical axes is adjustable. As a result, the guide rollers can be adjusted centrally to the plate on the outside width.
  • the measuring device for detecting the waviness of the sheet works with electro-optical sensors.
  • other distance sensors such as ultrasonic sensors, are also contemplated to detect the distance between the measuring device and the surface of the sheet.
  • each drive preferably has a displacement sensor, which detects the translational path of the drive for stretching the sheet.
  • Absolute encoders, incremental encoders, ultrasonic sensors or electro-optical sensors can be considered as displacement sensors.
  • the actual values of the extension are needed for a desired value comparison for ending the extension in the arithmetic unit.
  • the device for leveling (10) consists essentially of a machine frame (20), the clamping devices (30) for clamping the edges of a perforated plate (40), drives (50, 60, 70) for the clamping devices (30) and a transport device ( 80). Furthermore, on the input side, a centering and feeding device (90) for the directional perforated plates (40) is arranged on the machine frame (20).
  • FIG. 7 shows a plan view of a longitudinal and transverse waves exhibiting perforated plate (40) with a longitudinal direction (45) of the sheet (40) extending left and right longitudinal edge (41, 42) and a transversely extending (46) of the sheet upper and lower end face Edge (43, 44).
  • the edges (41-44) surround a perforated field (47) whose holes are not shown for the sake of clarity.
  • FIG. 7 Before planing the perforated plate (40), it is necessary to detect the ripples caused by the longitudinal and transverse waves of the perforated plate (40).
  • For detecting the waviness of the perforated plate (40) is an in FIG. 7 not shown measuring device used with an electro-optical distance sensor.
  • the measuring device is moved along the measuring tracks (n1-n7) running parallel to the longitudinal direction (45) relative to the stationary perforated plate (40).
  • the movement of the measuring device takes place in a plane (49) which is plane-parallel to a virtual flat bearing surface (48) for the perforated plate (40).
  • Measurements taken along the measuring tracks (n1-n7) result in a height profile of the perforated plate (40) which, together with the other height profiles recorded along the remaining measuring tracks, gives a three-dimensional image of the corrugated surface of the perforated plate (40).
  • the data recorded by the measuring device for detecting the ripple data set is in a control / computing unit, not shown, taking into account the known Yield point of the perforated plate used for determining setpoint values for the extension for planarizing the sheet in the longitudinal and / or transverse direction (45, 46).
  • the yield strength is a material characteristic of the metal, which indicates the stress up to which the metal shows no visible plastic deformation with uniaxial and torque-free tensile stress.
  • this is the device (10) via the centering and feeding device (90), as in FIG. 1 recognizable, supplied.
  • the device (10) has ten clamping devices (30) for clamping the left longitudinal edge (41) and ten clamping devices (30) for clamping the right longitudinal edge (42) of the perforated plate (40) (see. FIG. 2 ).
  • Each clamping device (30) is associated with a drive (60) in the form of a pressure medium cylinder for stretching the sheet in the transverse direction (46), which has a piston rod as the output member (61).
  • the pressure medium cylinder has an axle receptacle (62), which is pivotable about an axis (63) fixed to the machine frame (20).
  • the piston rod is in turn connected via a hinge joint (64) hingedly connected to the end of a lever (31) of the clamping device (30).
  • a clamping jaw (32) On the underside of the lever (31) pointing in the direction of the perforated plate (40), a clamping jaw (32) is fastened, which can be brought into abutment on the upwardly facing surface of the perforated plate (40).
  • the lever (31) is articulated at the opposite end of the hinge joint (64) to a holder (33) for a further clamping jaw (34) which bears against the opposite surface of the perforated plate (40).
  • the holders (33) are guided displaceably on guide parts (21) of the machine frame (20) exclusively in the transverse direction (46).
  • the clamping jaws (32, 34) do not necessarily have to be designed as a separate component, but may be an integral part of the holder (33) and the lever (31).
  • the piston rod By pressing the pressure medium cylinder of the drive (60), the piston rod is extended, so that the clamping jaw (32) on the longitudinal edge (41, 42) of the perforated plate (40) lowers while the longitudinal edge (41, 42) between the upper jaw (40). 32) and the lower jaw (34) clamped.
  • the lever (31) guided by the hinge joint (64) moves in the direction of the surface, thereby pushing the holder (33) along the guide part (21) in the transverse direction (46) of the perforated plate (40).
  • the perforated plate (40) is thereby stretched in the transverse direction (46), whereby any transverse waves are straightened.
  • the straightening of longitudinal shafts takes place with only one clamping device (30), which clamps the upper end edge (43) and a clamping device (30) which clamps the lower end edge (44) (cf. FIG. 3 ).
  • Due to the relatively small sheet width it is not necessary to arrange a plurality of clamping devices on the front edges (43, 44). However, if the sheet (40) has a greater width, it may also be indicated on the end faces to provide a plurality of clamping devices (30).
  • the front-side clamping devices (30) have a first over the entire width of the perforated plate (40) extending upper jaw (35) in the form of a clamping bar, which comes to rest on the surface of the perforated plate (40).
  • the clamping device (30) has a lower jaw (36) in the form of a clamping bar, which bears against the downwardly facing surface of the perforated plate (40).
  • a lower jaw (36) in the form of a clamping bar, which bears against the downwardly facing surface of the perforated plate (40).
  • On the upper side of the upper clamping bar (35) are two bearing blocks (37), about the axes of which a bearing eye (52) is pivotable.
  • the bearing eye (52) is arranged on the end side on an output member (51) in the form of a piston rod of a drive (50) designed as a pressure medium cylinder.
  • a drive (50) designed as a pressure medium cylinder.
  • At the opposite end of the drive (50) is mounted around a transversely extending (46) pivot axis in a C-shaped frame part (22, 23) of the machine frame (20).
  • the lower clamping bar (36) is displaceably guided on a horizontal sliding surface (24) of the C-shaped frame part (22) in the longitudinal direction (45).
  • the drive (50) has no double function, but serves exclusively for clamping the front-side upper and lower edges (43, 44) between the clamping jaws (35, 36).
  • the actual stretching of the perforated plate (40) in the longitudinal direction (45) takes place, however, after the clamping of the edges (43, 44) by the drive (70), which is below the transport device (80) for the perforated plate (40).
  • the drive (70) is also designed as a pressure medium cylinder, the housing side is pivotally connected to the machine frame (20).
  • the output member, not shown in the figures in the form of a piston rod is in turn pivotally connected to the lower clamping bar (36).
  • the piston rod By applying pressure to the pressure medium cylinder (70), the piston rod extends and displaces the clamping bar (36) in the longitudinal direction along the sliding surfaces (24, 25) of the C-shaped frame parts (22, 23) in the opposite direction, causing an expansion of the perforated plate ( 40) in the longitudinal direction and thus an elimination of the longitudinal shafts comes.
  • the transport device (80) is only from the FIGS. 1 and 6 showing the device for leveling (10) immediately before the insertion of the perforated plate (40) or during the removal of the directed perforated plate (40), recognizable.
  • the transport device (80) comprises a plurality of cylindrical rollers (81), which together form a bearing surface for forming the perforated plate (40) between the clamping devices (30).
  • the centering and feeding device (90) comprises two roller holders (91), each having two guide rollers (92).
  • the roller holders (91) have a base (93) with two parallel transversal (46) passageways (94) slidingly guiding the base (93) by means of slide bushings along two guide rods (95).
  • the guide rods (95) extend between two spaced-apart frame parts (26) of the machine frame (20).
  • a motor gear unit (96) is arranged centrally between the abutment points of the guide rods (95) on the left-hand frame part (26), which moves the pedestals (93) toward and away from each other via a spindle (97).
  • the rollers (81) By means of a drive for the rollers (81), not shown, the perforated plate (40) after straightening, as seen from FIG. 6 recognizable from the device for planing (10) pushed out and fed to further processing.
  • FIG. 1 illustrates how the non-directed perforated plate (40) in the centering and feeding device (90) between the guide rollers (92) passes.
  • the centered perforated plate (40) is further promoted to the transport device (80), as is made FIG. 2 is recognizable.
  • the perforated plate in the longitudinal and transverse directions (45, 46) by means of the clamping devices (30) is stretched.
  • transducers not shown, detect the actual values of the extension of the perforated plate (40). The detected actual values are compared in the unillustrated control / computer unit with the previously determined desired values for the extension.
  • the actuation of the drives (60, 70) is terminated (cf. FIG. 4 ).
  • FIG. 5 shows how after stretching the drives (50, 60) are opened and the directional perforated plate (40) is released.
  • FIG. 6 finally shows the removal of the directed perforated plate (40) through the output (11) from the device (10).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

The method involves acquiring ripple of a metal sheet (40). Target values for flattening the metal sheet along longitudinal and/or transverse direction are determined by an algorithm before acquiring the ripple and yield strength of the metal sheet. Longitudinal edges and/or front side edges of the metal sheet are clamped by a clamping device (30). The metal sheet is stretched along the longitudinal and/or transverse direction by using the clamping device. Actual values of the stretching of the metal sheet are acquired. An independent claim is also included for a device for flattening a rectangular metal sheet.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Planrichten eines rechteckigen Blechs mit einem in Längsrichtung des Blechs verlaufenden linken und rechten Längsrand sowie einem in Querrichtung des Blechs verlaufenden oberen und unteren stirnseitigen Rand.The invention relates to a method and an apparatus for planarizing a rectangular sheet with a left and right longitudinal edge extending in the longitudinal direction of the sheet and a top and bottom edge extending in the transverse direction of the sheet metal.

Die Erfindung betrifft insbesondere ein Verfahren und eine Vorrichtung zum Planrichten von Lochblechen und Streckgitter. Als Lochformen unterscheidet man die Rundlochung, Quadratlochung, Sechsecklochung, Langlochung, Zierlochung und die Sonderlochung. Streckgitter stellen eine besondere Form der Lochung dar und entstehen durch versetzte Schnitte und Streckung ohne Materialverlust. Das Streckmetall kann beispielsweise Rautenmaschen, Rundlochmaschen, oder Quadratmaschen zur Ausbildung der Löcher aufweisen.In particular, the invention relates to a method and a device for planarizing perforated plates and expanded gratings. As hole shapes one distinguishes the round holes, Quadratlochung, hexagonal holes, oblong holes, ornamental perforation and the special perforation. Expanded meshes are a special form of perforation and result from staggered cuts and stretching without loss of material. The expanded metal may have, for example, diamond meshes, round-hole meshes, or square meshes for forming the holes.

Lochbleche werden in zahlreichen Bereichen genutzt, beispielsweise in der Raumgestaltung für Wandverkleidungen, Trennwände sowie als Design-Elemente, in der Klimatechnik als Sonnenschutzpaneele sowie als Heiz-/Kühlsegel, in der Aufbereitungstechnik für Siebbeläge sowie im Bereich der Akustik unter anderem für Lärmschutzwände.Perforated sheets are used in numerous areas, for example in interior design for wall coverings, partitions and as design elements, in the air conditioning as sun protection panels and as heating / cooling sails, in the processing technology for screen coverings and in the field of acoustics, including noise barriers.

Ein Lochblech weist üblicherweise an der linken und rechten Längsseite sowie der unteren und oberen Stirnseite einen ungelochten Rand auf. Dieser ist von der Art der Lochung, der Blechdicke, den Toleranzen, den Außenmaßen des Blechs und den Fertigungstoleranzen beim Lochen abhängig. Zwischen dem linken und rechten Längsrand sowie dem oberen und unteren Stirnrand des Lochblechs befindet sich das Lochfeld, in dem die Löcher in mehreren Reihen, ggf. mit einem Lochversatz zueinander angeordnet sind.A perforated plate usually has on the left and right longitudinal side and the lower and upper end face on a non-perforated edge. This depends on the type of perforation, the sheet thickness, the tolerances, the outer dimensions of the sheet and the manufacturing tolerances during punching. Between the left and right longitudinal edge and the upper and lower end edge of the perforated plate is the hole field in which the holes are arranged in several rows, possibly with a hole offset to each other.

Obwohl sich das erfindungsgemäße Verfahren in erster Linie auf derartige Lochbleche bezieht, kann es auch bei herkömmlichen, als Tafel ausgelieferten Blechen zum Einsatz gelangen. Dies gilt ebenso bei Streckgittern, welche üblicherweise keine lochfreien Längsränder aufweisen.Although the method according to the invention relates primarily to such perforated sheets, it can also be used in conventional sheets delivered as sheets. This also applies to expanded mesh, which usually have no hole-free longitudinal edges.

Einzelne Lochbleche werden heute zumeist in Rollenrichtmaschinen plangerichtet. Beim Richten in Rollenrichtmaschinen werden die nach der DIN EN geforderten Planheitstoleranzen erreicht. Das zu richtende Lochblech durchläuft eine keilförmig vom Ein- zum Auslauf angestellte Richtrollenanordnung, wobei das Lochblech mehrfach in beide Richtungen durchgebogen wird. Die Durchbiegung wird so eingestellt, dass nicht plane Abschnitte des Lochblechs die Streckgrenze des verwendeten Metalls überschreiten, wodurch die nicht ebenen Abschnitte plastisch und dauerhaft begradigt werden. Die bereits planen Bereiche des Blechs werden lediglich unterhalb der Streckgrenze verformt, so dass in diesen Bereichen keine plastische Verformung eintritt.Today, individual perforated sheets are mostly planed in roll straightening machines. When straightening in roller leveling machines, the flatness tolerances required by DIN EN are achieved. The perforated plate to be straightened passes through a wedge-shaped straightening roller arrangement which is set from the inlet to the outlet, whereby the perforated plate is bent several times in both directions. The deflection is adjusted so that non-planar sections of the perforated plate exceed the yield strength of the metal used, whereby the non-planar sections are plastically and permanently straightened. The already planned areas of the sheet are deformed only below the yield point, so that no plastic deformation occurs in these areas.

Durch quer zur Längsrichtung des Blechs wirkende Anstellsysteme können die Richtrollen der Richtrollenmaschine derart gebogen werden, dass gezielt die Ränder und/oder einzelne Bereiche im Lochfeld eine zusätzliche Dehnung erfahren. Die Bedienperson für die Richtrollenmaschine wählt die Parameter für die keilförmige Anstellung der Richtrollen vom Einlauf zum Auslauf und der Anstellsysteme quer zum Lochblech aufgrund ihrer Erfahrung. Die Ergebnisse des Planrichtens sind daher nicht ohne weiteres reproduzierbar. In Folge dessen muss der Vorgang des Planrichtens häufig mehrfach wiederholt werden.By means of positioning systems acting transversely to the longitudinal direction of the sheet metal, the straightening rollers of the straightening roller machine can be bent in such a way that the edges and / or individual areas in the perforated field are additionally subjected to additional stretching. The operator for the straightening roller machine selects the parameters for the wedge-shaped adjustment of the straightening rollers from the inlet to the outlet and the positioning systems transverse to the perforated plate based on their experience. The results of the plan directing are therefore not readily reproducible. As a result, the process of leveling often has to be repeated several times.

Durch die mehrfache wechselsinnige Biegung der Lochbleche kommt es insbesondere im Bereich der Längsränder und der stirnseitigen Ränder des Lochblechs zu Materialanrissen, die sich von den angrenzenden Löchern ausbreiten. Des Weiteren kommt es aufgrund der Wechselbiegungen des Lochblechs in der Rollenrichtmaschine zu einer nicht berechenbaren Längenänderung des Lochblechs.Due to the multiple alternating bending of the perforated sheets, material cracks, which propagate from the adjacent holes, occur, in particular in the area of the longitudinal edges and the front edges of the perforated sheet. Furthermore Due to the alternating bends of the perforated plate in the roller straightening machine, there is an unpredictable change in length of the perforated plate.

Aufgrund der vorgenannten Umstände sind für jedes Lochblech mit abweichender Lochformen, unterschiedlichem Lochmuster, Werkstoff und unterschiedlichen Abmessungen mehrere Versuche erforderlich, um die Parameter zur Einstellung der Rollenrichtmaschine für das nachfolgende Richten der Lochbleche eines Typs zu ermitteln.Due to the aforementioned circumstances, several tests are required for each perforated plate with different hole shapes, different hole pattern, material and different dimensions to determine the parameters for setting the roller leveler for the subsequent straightening of the perforated plates of a type.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zu Grunde, ein Verfahren und eine Vorrichtung zum Planrichten eines rechteckigen Blechs, insbesondere eines Lochblechs vorzuschlagen, bei dem lediglich ein Richtvorgang erforderlich ist, Materialanrisse aufgrund von Wechselbiegungen vermieden und nicht berechenbare Längenänderungen vermieden werden.Based on this prior art, the invention is based on the object to provide a method and apparatus for planarizing a rectangular sheet, in particular a perforated plate, in which only a straightening process is required, avoid material cracks due to bends and unpredictable changes in length are avoided.

Diese Aufgabe wird bei einem Verfahren der eingangs erwähnten durch die folgenden Schritte gelöst:

  • Erfassung der Welligkeit des Blechs,
  • Ermittlung von Sollwerten für die Streckung zum Planrichten des Blechs in Längs- und / oder Querrichtung mit einem Algorithmus, der die zuvor erfasste Welligkeit und die Streckgrenze des Blechs berücksichtigt,
  • Einspannen der Längsränder und / oder der stirnseitigen Ränder mittels jeweils mindestens einer Klemmvorrichtung,
  • Streckung des Blechs in Längs- und / oder Querrichtung des Blechs mit Hilfe der Klemmvorrichtungen,
  • Erfassen der Istwerte der Streckung des Blechs sowie
  • Beenden der Streckung des Blechs bei Erreichen der zuvor ermittelten Sollwerte für die Streckung.
This object is achieved in a method of the initially mentioned by the following steps:
  • Detection of the waviness of the sheet,
  • Determination of set values for the stretch for planarizing the sheet in the longitudinal and / or transverse direction with an algorithm that takes into account the previously detected waviness and the yield strength of the sheet,
  • Clamping the longitudinal edges and / or the front edges by means of at least one clamping device,
  • Stretching of the sheet in the longitudinal and / or transverse direction of the sheet by means of the clamping devices,
  • Recording the actual values of the extension of the sheet as well
  • Termination of the stretch of the sheet when reaching the previously determined set points for the stretch.

Eine Vorrichtung zur Durchführung des Verfahrens ist dadurch gekennzeichnet, dass die Vorrichtung jeweils mindestens eine Klemmvorrichtung zum Einspannen des linken und rechten Längsrandes des Blechs und/oder jeweils mindestens eine Klemmvorrichtung zum Einspannen des oberen und unteren stirnseitigen Randes des Blechs aufweist, zumindest jeder Klemmvorrichtung an einem der beiden Längsränder ein Antrieb zur Streckung des Blechs in Querrichtung zugeordnet ist und/oder zumindest jeder Klemmvorrichtung an einem der beiden stirnseitigen Ränder ein Antrieb zur Streckung des Blechs in Längsrichtung zugeordnet ist und die Vorrichtung Mittel zum Erfassen der Istwerte der Streckung des Blechs in Quer- und/oder Längsrichtung aufweist. Die Klemmvorrichtungen umfassen vorzugsweise Klemmbacken, die speziell auf das zu streckende Blech, insbesondere in dessen Randbereichen abgestimmt sind.An apparatus for carrying out the method is characterized in that the device has at least one clamping device for clamping the left and right longitudinal edge of the sheet and / or at least one clamping device for clamping the upper and lower frontal edge of the sheet, at least each clamping device on a the two longitudinal edges is assigned a drive for stretching the sheet in the transverse direction and / or at least one clamping device is assigned to each clamping device at one of the two end edges a drive for stretching the sheet in the longitudinal direction and the device means for detecting the actual values of the extension of the sheet in transverse and / or longitudinal direction. The clamping devices preferably comprise clamping jaws, which are specially adapted to the sheet to be stretched, in particular in its edge regions.

Durch das Erfassen der Welligkeit des Blechs, insbesondere der Wellen in Längs- und Querrichtung des Lochblechs lassen sich mit Hilfe eines Algorithmus und unter Berücksichtigung der bekannten Streckgrenze des verwendeten Metalls Soll-Werte für die Streckung zum Planrichten des Blechs in Längs- und/oder Querrichtung errechnen. Hieraus resultiert der gegenüber den herkömmlichen Verfahren entscheidende Vorteil, dass mit einem einmaligen Streckvorgang das Lochblech vollständig plangerichtet wird und unmittelbar ein reproduzierbares Richtergebnis für die folgenden Richtvorgänge vorliegt. Mehrere Versuche zur Ermittlung der Parameter zum Planrichten des Lochblechs sind nicht mehr erforderlich.By detecting the waviness of the sheet, in particular the waves in the longitudinal and transverse direction of the perforated sheet can be with the aid of an algorithm and taking into account the known yield strength of the metal used target values for the stretch for planarizing the sheet in the longitudinal and / or transverse direction calculate. This results in the decisive advantage over conventional methods that the perforated plate is completely planed with a single stretching operation and that a reproducible leveling result is immediately available for the following leveling processes. Several attempts to determine the parameters for planarizing the perforated plate are no longer necessary.

Das Blech wird ausschließlich in der Ebene des Blechs in Längs- und/oder Querrichtung mit Hilfe der Klemmvorrichtungen gestreckt. Hierdurch entfallen die bisher erforderlichen Wechselbiegungen des Blechs. In Folge dessen werden Materialanrisse und nicht berechenbare Längenänderungen der Lochbleche vermieden. Während der Streckung des Blechs werden die Istwerte der Streckung, insbesondere mit Hilfe von Wegmesssystemen erfasst. Sobald die Ist-Werte, die zuvor mit Hilfe des Algorithmus berechneten Soll-Werte für die Streckung erreicht haben, wird die Streckung mit Hilfe der Klemmvorrichtungen in Längs- und/oder Querrichtung des Blechs beendet.The sheet is stretched only in the plane of the sheet in the longitudinal and / or transverse direction by means of the clamping devices. This eliminates the previously required alternating bends of the sheet. As a result, material cracks and unpredictable changes in length of the perforated plates are avoided. During the stretching of the sheet, the actual values of the elongation, in particular with the aid of displacement measuring systems, are recorded. As soon as the actual values have reached the desired values for the elongation previously calculated with the aid of the algorithm, the stretching is terminated by means of the clamping devices in the longitudinal and / or transverse direction of the sheet.

Vor dem Richten weist das Lochblech üblicherweise Längs- und Querwellen auf. Zur Erfassung dieser Welligkeit ist dem eigentlichen Strecken des Blechs eine Messstation zur Erfassung der Welligkeit des Blechs vorgeordnet. Zur Erfassung der Welligkeit des Blechs erfasst die mindestens eine Messvorrichtung Abstandsänderungen zwischen einer der Oberflächen des Blechs und der Messvorrichtung, während die Messvorrichtung und das Blech relativ zueinander bewegt in einer zu einer virtuellen ebenen Auflagefläche des Blechs planparallelen Ebene bewegt werden. Vorzugsweise wird die mindestens eine Messvorrichtung relativ zum Blech in dessen Längsrichtung entlang mehrerer paralleler Messspuren bewegt. Durch eine ausreichende Anzahl von Messungen entlang der Messspuren ergibt sich interpoliert ein Längsprofil des Blechs. Durch Erfassen mehrerer parallel verlaufender Längsprofile ergibt sich ein dreidimensionales Abbild des Blechs. Selbstverständlich kann die Messvorrichtung die Abstandsänderungen auch entlang einer zu der Querrichtung des Blechs parallelen Linie erfassen.Before straightening, the perforated plate usually has longitudinal and transverse waves. To detect this ripple the actual stretching of the sheet is preceded by a measuring station for detecting the ripple of the sheet. For detecting the waviness of the sheet, the at least one measuring device detects changes in the distance between one of the surfaces of the sheet and the measuring device while the measuring device and the sheet are moved relative to one another in a plane that is plane-parallel to a virtual planar bearing surface of the sheet. Preferably, the at least one measuring device is moved relative to the sheet in its longitudinal direction along a plurality of parallel measuring tracks. By a sufficient number of measurements along the measuring tracks results interpolated a longitudinal profile of the sheet. By detecting a plurality of parallel longitudinal profiles results in a three-dimensional image of the sheet. Of course, the measuring device can also detect the changes in distance along a line parallel to the transverse direction of the sheet.

Insbesondere an den schmaleren stirnseitigen Rändern des Lochblechs kann jede Klemmvorrichtung an einem der Ränder ortsfest ausgeführt sein, während die Klemmvorrichtung(en) an dem gegenüberliegenden Rand bewegt wird bzw. zumindest teilweise bewegt werden. Hierdurch lässt sich der apparative Aufwand reduzieren. An dem linken und rechten längeren Längsrand greifen vorzugsweise mehrere Klemmvorrichtungen zur Eliminierung von Querwellen an. Je nach Oberflächenprofil des Lochblechs ist es nicht erforderlich, über die gesamte Länge quer zum Blech mit sämtlichen Klemmvorrichtungen zu ziehen, um die Querwellen zu eliminieren.In particular, at the narrower end edges of the perforated plate, each clamping device can be made stationary on one of the edges, while the clamping device (s) the opposite edge is moved or at least partially moved. As a result, the expenditure on equipment can be reduced. At the left and right longer longitudinal edge preferably engage a plurality of clamping devices for the elimination of transverse waves. Depending on the surface profile of the perforated plate, it is not necessary to pull across the entire length across the plate with all the clamping devices to eliminate the transverse waves.

Vorzugsweise sind sämtliche an den Längsrändern angeordneten Klemmvorrichtungen mit einem Antrieb zur Streckung des Blechs in Querrichtung versehen. An den Stirnseiten genügt es, wenn die Klemmvorrichtung an einer der beiden stirnseitigen Ränder einen Antrieb zur Streckung des Blechs in Längsrichtung aufweist. Als Antriebe für die Klemmbalken bzw. die an den Klemmbalken angeordneten Klemmbacken der Klemmvorrichtungen kommen insbesondere Linearantriebe in Betracht, die eine translatorische Bewegung des Klemmbalkens in der Blechebene hervorrufen. In Betracht kommen Hydraulik- oder Pneumatikzylinder, elektromechanische Linearantriebe oder auch Gewindestangenantriebe.Preferably, all arranged on the longitudinal edges clamping devices are provided with a drive for stretching the sheet in the transverse direction. At the end faces it is sufficient if the clamping device at one of the two end edges has a drive for stretching the sheet in the longitudinal direction. As drives for the clamping bar or arranged on the clamping bar jaws of the clamping devices are in particular linear actuators into consideration, which cause a translational movement of the clamping bar in the sheet metal plane. In consideration are hydraulic or pneumatic cylinders, electromechanical linear drives or threaded rod drives.

Die Verschiebung eines Klemmbalkens kann jedoch auch mit Hilfe einer auf den Klemmbalken wirkenden Exzenter-Welle bewirkt werden. Alternativ besteht die Möglichkeit, mittels eines Keilspanners die gegenüberliegenden, auf beiden Seiten des Blechs angreifenden Klemmbalken zu schließen und durch Abgleiten der Keilflächen aufeinander die Streckbewegung in die Ränder des Blechs einzuleiten.However, the displacement of a clamping bar can also be effected by means of an eccentric shaft acting on the clamping bar. Alternatively, it is possible to close by means of a wedge clamp the opposite, acting on both sides of the sheet clamping bar and initiate by sliding the wedge surfaces on each other, the stretching movement in the edges of the sheet.

Je nach Ausführungsform kann die Klemmvorrichtung einen separaten Antrieb zum Schließen der Klemmbacken sowie einen separaten Antrieb zur Streckung des Blechs in Längs- oder Querrichtung aufweisen. Der Antrieb zum Schließen und Öffnen der Klemmbacken kann jedoch zugleich der Streckung des Blechs in Längs- oder Querrichtung dienen.Depending on the embodiment, the clamping device may have a separate drive for closing the jaws and a separate drive for stretching the sheet in the longitudinal or transverse direction. However, the drive to close and open the jaws can also serve to stretch the sheet in the longitudinal or transverse direction.

Für die Doppelfunktion des Antriebs ist dessen Abtriebsglied gelenkig mit einem Ende eines Hebels verbunden, an dem eine Klemmbacke der Klemmvorrichtung angeordnet ist, die auf einer Oberfläche des Blechs zur Anlage bringbar ist. Am gegenüberliegenden Ende des Hebels ist eine ausschließlich in Quer- oder Längsrichtung verschiebbare Halterung für eine Klemmbacke der Klemmvorrichtung angelenkt, die auf der gegenüberliegenden Oberfläche des Blechs zur Anlage bringbar ist. Während der Schließbewegung der beiden Klemmbacken kommt es zu einer überlagerten Verschiebebewegung der Halterungen in Längs- oder Querrichtung, so dass es nach Aufbau einer hinreichenden Klemmkraft zwischen den Klemmbacken zu der gewünschten Streckung des Blechs kommt.For the dual function of the drive whose output member is pivotally connected to one end of a lever on which a jaw of the clamping device is arranged, which can be brought to bear on a surface of the sheet. At the opposite end of the lever an exclusively displaceable in the transverse or longitudinal direction holder for a clamping jaw of the clamping device is articulated, which can be brought to bear on the opposite surface of the sheet. During the closing movement of the two jaws there is a superimposed sliding movement of the brackets in the longitudinal or transverse direction, so that it comes after building a sufficient clamping force between the jaws to the desired extension of the sheet.

Eine bevorzugte Ausführungsform einer Klemmvorrichtung, deren Antrieb zum Strecken des Blechs zugleich die Schließfunktion übernimmt, ergibt sich aus den Merkmalen des Unteranspruchs 7.A preferred embodiment of a clamping device whose drive at the same time takes over the closing function of the sheet, results from the features of subclaim 7.

Die Klemmvorrichtungen, die Antriebe und die Führungen für die Klemmvorrichtungen sind an einem Rahmen der Vorrichtung zum Planrichten angeordnet. Dieser Rahmen nimmt die beim Recken des Blechs erforderlichen Kräfte auf, die den Rahmen proportional zu der Kraft verformen. Diese Verformung des Rahmens wird in dem Algorithmus zur Berechnung der Soll-Streckung des Blechs vorzugsweise berücksichtigt.The clamping devices, the drives and the guides for the clamping devices are arranged on a frame of the device for planarizing. This frame absorbs the forces required in stretching the sheet which deform the frame in proportion to the force. This deformation of the frame is preferably taken into account in the algorithm for calculating the nominal extension of the sheet.

In vorteilhafter Ausgestaltung der Erfindung weist die Vorrichtung eine zwischen den Klemmvorrichtungen angeordnete Transporteinrichtung für das Blech auf. Diese Transporteinrichtung ist beispielsweise als Rollgang ausgestaltet. Die Transportvorrichtung dient dem Zweck, das Blech von einem Eingang zu einem Ausgang der Vorrichtung zu bewegen. Während des Reckens dient die Transporteinrichtung als Auflage für das Blech. Um das Blech der Transporteinrichtung und den um die Transporteinrichtung herum angeordneten Klemmvorrichtungen lagerichtig zuzuführen, ist dem Eingang der Vorrichtung eine Zentrier- und Zuführeinrichtung für das Blech vorgeordnet. Die Zentrier- und Zuführeinrichtung weist vorzugsweise mehrere Führungsrollen auf, die jeweils um eine im Bezug zur Oberfläche des Blechs vertikale Achse drehbar sind, wobei der Abstand zwischen den vertikalen Achsen einstellbar ist. Hierdurch können die Führungsrollen zentrisch zum Blech auf dessen Außenbreite eingestellt werden.In an advantageous embodiment of the invention, the device has a arranged between the clamping devices transport device for the sheet. This transport device is designed for example as a roller table. The transport device serves the purpose of moving the sheet from an input to an output of the device. During stretching, the transport device serves as a support for the sheet. To the sheet of the Transport device and the arranged around the transport device around clamping devices in the correct position, the input of the device is preceded by a centering and feeding device for the sheet. The centering and feeding device preferably has a plurality of guide rollers which are each rotatable about a vertical axis with respect to the surface of the sheet, wherein the distance between the vertical axes is adjustable. As a result, the guide rollers can be adjusted centrally to the plate on the outside width.

Die Messvorrichtung zur Erfassung der Welligkeit des Blechs arbeitet mit elektrooptischen Sensoren. In Betracht kommen jedoch auch andere Abstandssensoren, wie beispielsweise Ultraschallsensoren, um den Abstand zwischen der Messvorrichtung und der Oberfläche des Blechs zu erfassen.The measuring device for detecting the waviness of the sheet works with electro-optical sensors. However, other distance sensors, such as ultrasonic sensors, are also contemplated to detect the distance between the measuring device and the surface of the sheet.

Zur Erfassung der Ist-Werte der Streckung des Blechs weist vorzugsweise jeder Antrieb einen Wegsensor auf, der den translatorischen Weg des Antriebs zur Streckung des Blechs erfasst. Als Wegsensoren kommen Absolut-Wertgeber, Inkrementalgeber, Ultraschallsensoren oder elektrooptische Sensoren in Betracht. Die Ist-Werte der Streckung werden für einen Soll-Wertvergleich zum Beenden der Streckung in der Recheneinheit benötigt.For detecting the actual values of the extension of the sheet, each drive preferably has a displacement sensor, which detects the translational path of the drive for stretching the sheet. Absolute encoders, incremental encoders, ultrasonic sensors or electro-optical sensors can be considered as displacement sensors. The actual values of the extension are needed for a desired value comparison for ending the extension in the arithmetic unit.

Nachfolgend wird die Erfindung anhand der Figuren näher erläutert. Es zeigen:

Figuren 1 - 6
eine Vorrichtung zum Planrichten eines rechteckigen Blechs während der unterschiedlichen Schritte des Richtvorgangs sowie
Figur 7
eine schematische Darstellung eines Lochblechs vor dem Planrichten.
The invention will be explained in more detail with reference to the figures. Show it:
Figures 1-6
a device for planarizing a rectangular sheet during the different steps of the straightening process as well
FIG. 7
a schematic representation of a perforated plate before leveling.

Die Vorrichtung zum Planrichten (10) besteht im Wesentlichen aus einem Maschinenrahmen (20), den Klemmvorrichtungen (30) zum Einspannen der Ränder eines Lochblechs (40), Antrieben (50, 60, 70) für die Klemmvorrichtungen (30) sowie einer Transporteinrichtung (80). Ferner ist an dem Maschinenrahmen (20) eingangsseitig eine Zentrier- und Zuführeinrichtung (90) für die planzurichtenden Lochbleche (40) angeordnet.The device for leveling (10) consists essentially of a machine frame (20), the clamping devices (30) for clamping the edges of a perforated plate (40), drives (50, 60, 70) for the clamping devices (30) and a transport device ( 80). Furthermore, on the input side, a centering and feeding device (90) for the directional perforated plates (40) is arranged on the machine frame (20).

Figur 7 zeigt eine Aufsicht auf ein Längs- und Querwellen aufweisendes Lochblech (40) mit einem in Längsrichtung (45) des Blechs (40) verlaufenden linken und rechten Längsrand (41, 42) sowie einem in Querrichtung (46) des Blechs verlaufenden oberen und unteren stirnseitigen Rand (43, 44). Die Ränder (41 - 44) umgeben ein Lochfeld (47), dessen Löcher der Übersichtlichkeit halber nicht dargestellt sind. FIG. 7 shows a plan view of a longitudinal and transverse waves exhibiting perforated plate (40) with a longitudinal direction (45) of the sheet (40) extending left and right longitudinal edge (41, 42) and a transversely extending (46) of the sheet upper and lower end face Edge (43, 44). The edges (41-44) surround a perforated field (47) whose holes are not shown for the sake of clarity.

Vor dem Planrichten des Lochblechs (40) ist es erforderlich, die durch die Längs- und Querwellen bedingte Welligkeit des Lochblechs (40) zu erfassen. Zur Erfassung der Welligkeit des Lochblechs (40) wird eine in Figur 7 nicht dargestellte Messvorrichtung mit einem elektrooptischen Abstandssensor verwendet. Die Messvorrichtung wird entlang der parallel zur Längsrichtung (45) verlaufenden Messspuren (n1 - n7) relativ zu dem ortsfest gehaltenen Lochblech (40) bewegt. Die Bewegung der Messvorrichtung erfolgt in einer zu einer virtuellen ebenen Auflagefläche (48) für das Lochblech (40) planparallelen Ebene (49). Entlang der Messspuren (n1 - n7) aufgenommene Messwerte ergeben ein Höhenprofil des Lochblechs (40), das zusammen mit den anderen entlang der übrigen Messspuren aufgenommenen Höhenprofilen ein dreidimensionales Bild der gewellten Oberfläche des Lochblechs (40) ergibt.Before planing the perforated plate (40), it is necessary to detect the ripples caused by the longitudinal and transverse waves of the perforated plate (40). For detecting the waviness of the perforated plate (40) is an in FIG. 7 not shown measuring device used with an electro-optical distance sensor. The measuring device is moved along the measuring tracks (n1-n7) running parallel to the longitudinal direction (45) relative to the stationary perforated plate (40). The movement of the measuring device takes place in a plane (49) which is plane-parallel to a virtual flat bearing surface (48) for the perforated plate (40). Measurements taken along the measuring tracks (n1-n7) result in a height profile of the perforated plate (40) which, together with the other height profiles recorded along the remaining measuring tracks, gives a three-dimensional image of the corrugated surface of the perforated plate (40).

Der von der Messvorrichtung zur Erfassung der Welligkeit erfasste Datensatz wird in einer nicht dargestellten Steuer-/Rechnereinheit unter Berücksichtigung der bekannten Streckgrenze des Lochblechs zur Ermittlung von Soll-Werten für die Streckung zum Planrichten des Blechs in Längs- und/oder Querrichtung (45, 46) verwendet. Die Streckgrenze ist ein Werkstoffkennwert des Metalls, der diejenige Spannung bezeichnet, bis zu der das Metall bei einachsiger und momentfreier Zugbeanspruchung keine sichtbare plastische Verformung zeigt.The data recorded by the measuring device for detecting the ripple data set is in a control / computing unit, not shown, taking into account the known Yield point of the perforated plate used for determining setpoint values for the extension for planarizing the sheet in the longitudinal and / or transverse direction (45, 46). The yield strength is a material characteristic of the metal, which indicates the stress up to which the metal shows no visible plastic deformation with uniaxial and torque-free tensile stress.

Zum Planrichten des gewellten Lochblechs (40) wird dies der Vorrichtung (10) über die Zentrier- und Zuführeinrichtung (90), wie in Figur 1 erkennbar, zugeführt.For planarizing the corrugated perforated plate (40), this is the device (10) via the centering and feeding device (90), as in FIG. 1 recognizable, supplied.

Die Vorrichtung (10) weist zehn Klemmvorrichtungen (30) zum Einspannen des linken Längsrandes (41) und zehn Klemmvorrichtungen (30) zum Einspannen des rechten Längsrandes (42) des Lochblechs (40) auf (vgl. Figur 2). Jeder Klemmvorrichtung (30) ist ein Antrieb (60) in Form eines Druckmittelzylinders zur Streckung des Blechs in Querrichtung (46) zugeordnet, der als Abtriebsglied (61) eine Kolbenstange aufweist. Auf der gegenüberliegenden Seite weist der Druckmittelzylinder eine Achsaufnahme (62) auf, die um eine an dem Maschinenrahmen (20) festgelegte Achse (63) schwenkbar ist. Die Kolbenstange ist wiederum über ein Scharniergelenk (64) gelenkig mit dem Ende eines Hebels (31) der Klemmvorrichtung (30) verbunden. An der in Richtung des Lochblechs (40) weisenden Unterseite des Hebels (31) ist eine Klemmbacke (32) befestigt, die auf der nach oben weisenden Oberfläche des Lochblechs (40) zur Anlage bringbar ist. Der Hebel (31) ist an dem dem Scharniergelenk (64) gegenüberliegenden Ende an einer Halterung (33) für eine weitere Klemmbacke (34) angelenkt, die an der gegenüberliegenden Oberfläche des Lochblechs (40) anliegt. Die Halterungen (33) sind auf Führungsteilen (21) des Maschinenrahmens (20) ausschließlich in Querrichtung (46) verschiebbar geführt. Die Klemmbacken (32,34) müssen nicht notwendigerweise als separates Bauteil ausgeführt sein, sondern können integraler Bestandteil der Halterung (33) bzw. des Hebels (31) sein.The device (10) has ten clamping devices (30) for clamping the left longitudinal edge (41) and ten clamping devices (30) for clamping the right longitudinal edge (42) of the perforated plate (40) (see. FIG. 2 ). Each clamping device (30) is associated with a drive (60) in the form of a pressure medium cylinder for stretching the sheet in the transverse direction (46), which has a piston rod as the output member (61). On the opposite side, the pressure medium cylinder has an axle receptacle (62), which is pivotable about an axis (63) fixed to the machine frame (20). The piston rod is in turn connected via a hinge joint (64) hingedly connected to the end of a lever (31) of the clamping device (30). On the underside of the lever (31) pointing in the direction of the perforated plate (40), a clamping jaw (32) is fastened, which can be brought into abutment on the upwardly facing surface of the perforated plate (40). The lever (31) is articulated at the opposite end of the hinge joint (64) to a holder (33) for a further clamping jaw (34) which bears against the opposite surface of the perforated plate (40). The holders (33) are guided displaceably on guide parts (21) of the machine frame (20) exclusively in the transverse direction (46). The clamping jaws (32, 34) do not necessarily have to be designed as a separate component, but may be an integral part of the holder (33) and the lever (31).

Durch Betätigen des Druckmittelzylinders des Antriebs (60) wird die Kolbenstange ausgefahren, so dass sich die Klemmbacke (32) auf den Längsrand (41, 42) des Lochblechs (40) absenkt und dabei den Längsrand (41, 42) zwischen der oberen Klemmbacke (32) und der unteren Klemmbacke (34) einklemmt. Gleichzeitig wandert der durch das Scharniergelenk (64) geführte Hebel (31) in Richtung der Oberfläche und schiebt dabei die Halterung (33) entlang des Führungsteils (21) in Querrichtung (46) des Lochblechs (40). Das Lochblech(40) wird dabei in Querrichtung (46) gestreckt, wodurch etwaige Querwellen begradigt werden.By pressing the pressure medium cylinder of the drive (60), the piston rod is extended, so that the clamping jaw (32) on the longitudinal edge (41, 42) of the perforated plate (40) lowers while the longitudinal edge (41, 42) between the upper jaw (40). 32) and the lower jaw (34) clamped. At the same time, the lever (31) guided by the hinge joint (64) moves in the direction of the surface, thereby pushing the holder (33) along the guide part (21) in the transverse direction (46) of the perforated plate (40). The perforated plate (40) is thereby stretched in the transverse direction (46), whereby any transverse waves are straightened.

Die Begradigung von Längswellen erfolgt indes mit nur einer Klemmvorrichtung (30), die den oberen stirnseitigen Rand (43) und einer Klemmvorrichtung (30), die den unteren stirnseitigen Rand (44) einspannt (vgl. Figur 3). Aufgrund der relativ geringen Blechbreite ist es nicht erforderlich, mehrere Klemmvorrichtungen an den stirnseitigen Rändern (43, 44) anzuordnen. Weist jedoch das Blech (40) eine größere Breite auf, kann es auch an den Stirnseiten angezeigt sein, mehrere Klemmvorrichtungen (30) vorzusehen. Die stirnseitigen Klemmvorrichtungen (30) weisen eine erste sich über die gesamte Breite des Lochblechs (40) erstreckende obere Klemmbacke (35) in Form eines Klemmbalkens auf, die auf der Oberfläche des Lochblechs (40) zur Anlage gelangt. Des Weiteren weist die Klemmvorrichtung (30) eine untere Klemmbacke (36) in Form eines Klemmbalkens auf, die an der nach unten weisenden Oberfläche des Lochblechs (40) anliegt. Auf der Oberseite des oberen Klemmbalkens (35) befinden sich zwei Lagerböcke (37), um deren Achsen jeweils ein Lagerauge (52) schwenkbar ist. Das Lagerauge (52) ist endseitig an einem Abtriebsglied (51) in Form einer Kolbenstange eines als Druckmittelzylinder ausgeführten Antriebs (50) angeordnet. Am gegenüberliegenden Ende des Antriebs (50) ist dieser um eine in Querrichtung (46) verlaufende Schwenkachse in einem C-förmigen Rahmenteil (22, 23) des Maschinenrahmens (20) gelagert.The straightening of longitudinal shafts, however, takes place with only one clamping device (30), which clamps the upper end edge (43) and a clamping device (30) which clamps the lower end edge (44) (cf. FIG. 3 ). Due to the relatively small sheet width, it is not necessary to arrange a plurality of clamping devices on the front edges (43, 44). However, if the sheet (40) has a greater width, it may also be indicated on the end faces to provide a plurality of clamping devices (30). The front-side clamping devices (30) have a first over the entire width of the perforated plate (40) extending upper jaw (35) in the form of a clamping bar, which comes to rest on the surface of the perforated plate (40). Furthermore, the clamping device (30) has a lower jaw (36) in the form of a clamping bar, which bears against the downwardly facing surface of the perforated plate (40). On the upper side of the upper clamping bar (35) are two bearing blocks (37), about the axes of which a bearing eye (52) is pivotable. The bearing eye (52) is arranged on the end side on an output member (51) in the form of a piston rod of a drive (50) designed as a pressure medium cylinder. At the the opposite end of the drive (50) is mounted around a transversely extending (46) pivot axis in a C-shaped frame part (22, 23) of the machine frame (20).

Der untere Klemmbalken (36) ist auf einer horizontalen Gleitfläche (24) des C-förmigen Rahmenteils (22) in Längsrichtung (45) verschiebbar geführt.The lower clamping bar (36) is displaceably guided on a horizontal sliding surface (24) of the C-shaped frame part (22) in the longitudinal direction (45).

Abweichend zu dem Antrieb (60) hat der Antrieb (50) keine Doppelfunktion, sondern dient ausschließlich dem Einspannen der stirnseitigen oberen und unteren Ränder (43, 44) zwischen den Klemmbacken (35, 36). Die eigentliche Streckung des Lochblechs (40) in Längsrichtung (45) erfolgt indes nach dem Einspannen der Ränder (43, 44) durch den Antrieb (70), der sich unterhalb der Transporteinrichtung (80) für das Lochblech (40) befindet. Der Antrieb (70) ist ebenfalls als Druckmittelzylinder ausgeführt, der gehäuseseitig gelenkig mit dem Maschinenrahmen (20) verbunden ist. Das in den Figuren nicht dargestellte Abtriebsglied in Form einer Kolbenstange ist wiederum gelenkig mit dem unteren Klemmbalken (36) verbunden. Durch Beaufschlagen des Druckmittelzylinders (70) fährt die Kolbenstange aus und verschiebt die Klemmbalken (36) in Längsrichtung entlang der Gleitflächen (24, 25) der C-förmigen Rahmenteile (22, 23) in entgegengesetzter Richtung, wodurch es zu einer Streckung des Lochblechs (40) in Längsrichtung und damit einer Eliminierung der Längswellen kommt.In contrast to the drive (60), the drive (50) has no double function, but serves exclusively for clamping the front-side upper and lower edges (43, 44) between the clamping jaws (35, 36). The actual stretching of the perforated plate (40) in the longitudinal direction (45) takes place, however, after the clamping of the edges (43, 44) by the drive (70), which is below the transport device (80) for the perforated plate (40). The drive (70) is also designed as a pressure medium cylinder, the housing side is pivotally connected to the machine frame (20). The output member, not shown in the figures in the form of a piston rod is in turn pivotally connected to the lower clamping bar (36). By applying pressure to the pressure medium cylinder (70), the piston rod extends and displaces the clamping bar (36) in the longitudinal direction along the sliding surfaces (24, 25) of the C-shaped frame parts (22, 23) in the opposite direction, causing an expansion of the perforated plate ( 40) in the longitudinal direction and thus an elimination of the longitudinal shafts comes.

Die Transporteinrichtung (80) ist lediglich aus den Figuren 1 und 6, die die Vorrichtung zum Planrichten (10) unmittelbar vor dem Einführen des Lochblechs (40) bzw. während des Abtransports des gerichteten Lochblechs (40) zeigen, erkennbar. Die Transporteinrichtung (80) umfasst mehrere zylindrische Rollen (81), die zusammen eine Auflagefläche für das Lochblech (40) zwischen den Klemmvorrichtungen (30) bilden.The transport device (80) is only from the FIGS. 1 and 6 showing the device for leveling (10) immediately before the insertion of the perforated plate (40) or during the removal of the directed perforated plate (40), recognizable. The transport device (80) comprises a plurality of cylindrical rollers (81), which together form a bearing surface for forming the perforated plate (40) between the clamping devices (30).

Das Einführen des ungerichteten Lochblechs (40) erfolgt mit der Zentrier- und Zuführeinrichtung (90) (vgl. Figur 1). Die Zentrier- und Zuführeinrichtung (90) umfasst zwei Rollenhalterungen (91), die jeweils zwei Führungsrollen (92) aufweisen. Die Rollenhalterungen (91) weisen einen Sockel (93) mit zwei parallel zueinander angeordneten, in Querrichtung (46) verlaufenden Durchgängen (94) auf, die den Sockel (93) mit Hilfe von Gleitbuchsen längs zweier Führungsstäbe (95) gleitend führen. Die Führungsstäbe (95) erstrecken sich zwischen zwei im Abstand zueinander angeordneten Rahmenteilen (26) des Maschinenrahmens (20). Mittig zwischen den Anschlagspunkten der Führungsstäbe (95) an dem im Bild linken Rahmenteil (26) ist eine MotorGetriebeeinheit (96) angeordnet, die über eine Spindel (97) die Sockel (93) aufeinander zu bzw. voneinander weg bewegt. Hierdurch lässt sich der Abstand der Führungsrollen (92) gleichmäßig in Bezug auf die Längs-Mittenachse des Lochblechs (40) vergrößern bzw. verkleinern, so dass unterschiedlich breite Lochbleche (40) über einen Eingang (12) der Transporteinrichtung (80) lagerichtig zugeführt werden können. Mittels eines nicht dargestellten Antriebs für die Rollen (81) wird das Lochblech (40) nach dem Richten, wie aus Figur 6 erkennbar aus der Vorrichtung zum Planrichten (10) herausgeschoben und der Weiterverarbeitung zugeführt.The insertion of the non-directional perforated plate (40) takes place with the centering and feeding device (90) (see. FIG. 1 ). The centering and feeding device (90) comprises two roller holders (91), each having two guide rollers (92). The roller holders (91) have a base (93) with two parallel transversal (46) passageways (94) slidingly guiding the base (93) by means of slide bushings along two guide rods (95). The guide rods (95) extend between two spaced-apart frame parts (26) of the machine frame (20). A motor gear unit (96) is arranged centrally between the abutment points of the guide rods (95) on the left-hand frame part (26), which moves the pedestals (93) toward and away from each other via a spindle (97). As a result, the distance of the guide rollers (92) evenly with respect to the longitudinal center axis of the perforated plate (40) increase or decrease, so that different width perforated plates (40) via an input (12) of the transport device (80) are fed in the correct position can. By means of a drive for the rollers (81), not shown, the perforated plate (40) after straightening, as seen from FIG. 6 recognizable from the device for planing (10) pushed out and fed to further processing.

Das erfindungsgemäße Verfahren zum Planrichten des Lochblechs (40) wird nachfolgend anhand der Figuren 1 - 7 näher erläutert:

  • Zunächst wird entsprechend dem anhand von Figur 7 weiter oben erläuterten Verfahren die Welligkeit des Blechs erfasst. Die Erfassung kann in einer vorgeordneten Messstation erfolgen oder nachdem das Lochblech auf der Transporteinrichtung (80) lagegerecht ausgerichtet wurde. Die nicht dargestellte Steuer-/Rechnereinheit ermittelt sodann die Soll-Werte für die Streckung zum Planrichten des Lochblechs (40) in Längs- und Querrichtung (45, 46) unter Berücksichtigung der zuvor erfassten Welligkeit und der bekannten Streckgrenze des Blechs. Da die Querwellen bei größerer Blechlänge vielfach unterschiedlich stark ausgeprägt sind, werden für die einzelnen Antriebe (60) von der Steuer-/Rechnereinheit unterschiedliche Soll-Werte für die Streckung zum Planrichten in Querrichtung ermittelt
The inventive method for planarizing the perforated plate (40) is described below with reference to FIGS. 1-7 explained in more detail:
  • First, according to the basis of FIG. 7 discussed above method detects the ripple of the sheet. The detection can take place in an upstream measuring station or after the perforated plate on the transport device (80). has been aligned according to location. The control / computer unit, not shown, then determines the desired values for the extension for planarizing the perforated plate (40) in the longitudinal and transverse direction (45, 46), taking into account the previously detected waviness and the known yield strength of the sheet. Since the transverse waves are often pronounced to different degrees with a larger sheet length, the control / computer unit determines different target values for the extension for planar alignment in the transverse direction for the individual drives (60)

Figur 1 veranschaulicht, wie das nicht gerichtete Lochblech (40) in die Zentrier- und Zuführeinrichtung (90) zwischen die Führungsrollen (92) gelangt. Das zentrierte Lochblech (40) wird weiter bis zur Transporteinrichtung (80) gefördert, wie dies aus Figur 2 erkennbar ist. FIG. 1 illustrates how the non-directed perforated plate (40) in the centering and feeding device (90) between the guide rollers (92) passes. The centered perforated plate (40) is further promoted to the transport device (80), as is made FIG. 2 is recognizable.

Sodann werden mittels der Antriebe (50, 60) die Längsränder (41, 42) und die stirnseitigen Ränder (43, 44) des Lochblechs (40) mit den Klemmvorrichtungen (30) eingespannt (vgl. Figur 3) .Then by means of the drives (50, 60), the longitudinal edges (41, 42) and the front edges (43, 44) of the perforated plate (40) with the clamping devices (30) clamped (see. FIG. 3 ).

Durch fortgesetzte Betätigung der Antriebe (60) bzw. Betätigen der Antriebe (70) wird das Lochblech in Längs- und Querrichtung (45, 46) mit Hilfe der Klemmvorrichtungen (30) gestreckt. Gleichzeitig erfassen nicht dargestellte Messwertaufnehmer die Ist-Werte der Streckung des Lochblechs(40). Die erfassten Ist-Werte werden in der nicht dargestellten Steuer-/Rechnereinheit mit den zuvor ermittelten Soll-Werten für die Streckung verglichen. Bei Erreichen der Soll-Werte für die Streckung wird die Ansteuerung der Antriebe (60, 70) beendet (vgl. Figur 4).By continued actuation of the drives (60) or actuation of the drives (70), the perforated plate in the longitudinal and transverse directions (45, 46) by means of the clamping devices (30) is stretched. At the same time, transducers, not shown, detect the actual values of the extension of the perforated plate (40). The detected actual values are compared in the unillustrated control / computer unit with the previously determined desired values for the extension. When the desired values for the extension are reached, the actuation of the drives (60, 70) is terminated (cf. FIG. 4 ).

Figur 5 zeigt, wie nach dem Strecken die Antriebe (50, 60) geöffnet werden und das gerichtete Lochblech (40) freigegeben wird. Figur 6 zeigt schließlich den Abtransport des gerichteten Lochblechs (40) durch den Ausgang (11) aus der Vorrichtung (10). FIG. 5 shows how after stretching the drives (50, 60) are opened and the directional perforated plate (40) is released. FIG. 6 finally shows the removal of the directed perforated plate (40) through the output (11) from the device (10).

BezugszeichenlisteLIST OF REFERENCE NUMBERS

Nr.No. Bezeichnungdescription Nr.No. Bezeichnungdescription 1010 Vorrichtung zum PlanrichtenDevice for planning 4747 LochfeldLochfeld 1111 Ausgangoutput 4848 Auflageflächebearing surface 1212 Eingangentrance 4949 planparallele Ebeneplane parallel plane 2020 Maschinenrahmenmachine frame 5050 Antriebdrive 2121 Führungsteilguide part 5151 Abtriebsglieddriven member 2222 C-förmiges RahmenteilC-shaped frame part 5252 Lageraugebearing eye 2323 C-förmiges RahmenteilC-shaped frame part 5353 Achseaxis 2424 Gleitflächesliding surface 6060 Antrieb (Druckmittelzylinder)Drive (pressure cylinder) 2525 Gleitflächesliding surface 6161 Abtriebglied (Kolbenstange)Output member (piston rod) 2626 L-förmiges RahmenteilL-shaped frame part 6262 Achsaufnahmeaxle mount 3030 Klemmvorrichtungclamping device 6363 Achseaxis 3131 Hebellever 6464 Scharniergelenkhinge 3232 Klemmbackejaw 7070 Antriebdrive 3333 Halterungbracket 8080 Transporteinrichtungtransport means 3434 Klemmbackejaw 8181 Rollenroll 3535 Obere Klemmbacke (Klemmbalken)Upper jaw (clamping bar) 9090 Zentrier- und ZuführeinrichtungCentering and feeding device 3636 Untere Klemmbacke (Klemmbalken)Lower jaw (clamping bar) 9191 Rollenhalterungroll holder 3737 Lagerbockbearing block 9292 Führungsrolleleadership 4040 Lochblechperforated sheet 9393 Sockelbase 4141 Linker LängsrandLeft longitudinal edge 9494 Durchgangpassage 4242 Rechter LängsrandRight longitudinal edge 9595 FührungsstabCorporate Office 4343 Oberer stirnseitiger RandUpper front edge 9696 MotorgetriebeeinheitEngine transmission unit 4444 Unterer stirnseitiger RandLower front edge 9797 Spindelspindle 4545 Längsrichtunglongitudinal direction 4646 Querrichtungtransversely

Claims (10)

Verfahren zum Planrichten eines rechteckigen Blechs (40) mit einem in Längsrichtung (45) des Blechs (40) verlaufenden linken und rechten Längsrand (41, 42) sowie einem in Querrichtung (46) des Blechs (40) verlaufenden oberen und unteren stirnseitigen Rand (43, 44), gekennzeichnet durch die Schritte - Erfassung der Welligkeit des Blechs (40), - Ermittlung von Sollwerten für die Streckung zum Planrichten des Blechs (40) in Längs- und / oder Querrichtung (45, 46) mit einem Algorithmus, der die zuvor erfasste Welligkeit und die Streckgrenze des Blechs (40) berücksichtigt, - Einspannen der Längsränder (41, 42) und / oder der stirnseitigen Ränder (43, 44) mittels jeweils mindestens einer Klemmvorrichtung (30), - Streckung des Blechs (40) in Längs- und / oder Querrichtung (45, 46) des Blechs (40) mit Hilfe der Klemmvorrichtungen (30), - Erfassen der Istwerte der Streckung des Blechs (40) sowie - Beenden der Streckung des Blechs (40) bei Erreichen der zuvor ermittelten Sollwerte für die Streckung. Method for planarizing a rectangular sheet (40) with a left and right longitudinal edge (41, 42) extending in the longitudinal direction (45) of the sheet (40) and an upper and lower end edge (32) extending in the transverse direction (46) of the sheet (40). 43, 44), characterized by the steps Detecting the waviness of the sheet (40), Determination of set values for the stretch for planarizing the sheet (40) in the longitudinal and / or transverse direction (45, 46) with an algorithm that takes into account the previously detected waviness and the yield strength of the sheet (40), Clamping the longitudinal edges (41, 42) and / or the front edges (43, 44) by means of at least one clamping device (30), - stretching of the sheet (40) in the longitudinal and / or transverse direction (45, 46) of the sheet (40) by means of the clamping devices (30), - Recording the actual values of the extension of the sheet (40) and - terminating the stretch of the sheet (40) upon reaching the previously determined set points for the stretch. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zur Erfassung der Welligkeit des Blechs (40) mindestens eine Messvorrichtung Abstandsänderungen zwischen einer Oberfläche des Blechs (40) und der Messvorrichtung erfasst, während die Messvorrichtung und das Blech (40) relativ zueinander in einer zu einer virtuellen ebenen Auflagefläche (48) des Blechs (40) planparallelen Ebene (49) bewegt werden.A method according to claim 1, characterized in that for detecting the waviness of the sheet (40) at least one measuring device detects changes in distance between a surface of the sheet (40) and the measuring device, while the measuring device and the sheet (40) relative to each other in a to a virtual planar bearing surface (48) of the sheet (40) plane-parallel plane (49) are moved. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass die Messvorrichtung oder das Blech (40) entlang einer zu der Längs- und/oder Querrichtung (45, 46) des Blechs (40) parallelen Linie in der planparallelen Ebene (49) bewegt wird.A method according to claim 2, characterized in that the measuring device or the sheet (40) along a to the longitudinal and / or transverse direction (45, 46) of the sheet (40) parallel line in the plane-parallel plane (49) is moved. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zur Streckung des Blechs (40) jede Klemmvorrichtung (30) an einem der Ränder ortsfest gehalten wird und die Klemmvorrichtung(en) (30) an dem gegenüberliegenden Rand zumindest teilweise bewegt wird bzw. werden.Method according to one of claims 1 to 3, characterized in that, for stretching the sheet (40), each clamping device (30) is held stationary on one of the edges and the clamping device (s) (30) is at least partly moved or at the opposite edge . become. Vorrichtung zum Planrichten (10) eines rechteckigen Blechs (40) mit einem in Längsrichtung (45) des Blechs (40) verlaufenden linken und rechten Längsrand (41, 42) sowie einem in Querrichtung (46) des Blechs (40) verlaufenden oberen und unteren stirnseitigen Rand (43, 44), dadurch gekennzeichnet, dass - die Vorrichtung (10) jeweils mindestens eine Klemmvorrichtung (30) zum Einspannen des linken und rechten Längsrandes (41, 42) des Blechs (40) und/oder jeweils mindestens eine Klemmvorrichtung (30) zum Einspannen des oberen und unteren stirnseitigen Randes (43, 44) des Blechs (40) aufweist, - zumindest jeder Klemmvorrichtung (30) an einem der beiden Längsränder (41, 42) ein Antrieb (60) zur Streckung des Blechs (40) in Querrichtung (46) zugeordnet ist und/oder zumindest jeder Klemmvorrichtung (30) an einem der beiden stirnseitigen Ränder (43, 44) ein Antrieb (50) zur Streckung des Blechs (40) in Längsrichtung (45) zugeordnet ist und - die Vorrichtung (10) Mittel zum Erfassen der Istwerte der Streckung des Blechs (40) in Quer- und/oder Längsrichtung (45, 46) aufweist. Apparatus for planarizing (10) a rectangular sheet (40) having a left and right longitudinal edge (41, 42) extending in the longitudinal direction (45) of the sheet (40) and a top and bottom extending in the transverse direction (46) of the sheet (40) frontal edge (43, 44), characterized in that - The device (10) in each case at least one clamping device (30) for clamping the left and right longitudinal edge (41, 42) of the sheet (40) and / or at least one clamping device (30) for clamping the upper and lower front edge (43 , 44) of the sheet (40), - At least each clamping device (30) on one of the two longitudinal edges (41, 42) is associated with a drive (60) for stretching the sheet (40) in the transverse direction (46) and / or at least each clamping device (30) on one of the two end-side Rims (43, 44) is associated with a drive (50) for stretching the sheet (40) in the longitudinal direction (45) and - The device (10) comprises means for detecting the actual values of the extension of the sheet (40) in the transverse and / or longitudinal direction (45, 46). Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass die Vorrichtung (10) eine zwischen den Klemmvorrichtungen (30) angeordnete Transporteinrichtung (80) für das Blech (40) aufweist, mit der das Blech (40) von einem Eingang (12) zu einem Ausgang (11) der Vorrichtung (10) bewegbar ist und die zugleich als Auflage (48) für das Blech (40) während des Richtens dient und dass vor dem Eingang (12) eine Zentrier- und Zuführeinrichtung (90) zum lagerichtigen Zuführen des Blechs (40) zu der Transporteinrichtung (80) angeordnet ist.Apparatus according to claim 5, characterized in that the device (10) between the clamping devices (30) arranged transport means (80) for the sheet (40), with which the sheet (40) from an input (12) to an output (11) of the device (10) is movable and at the same time serves as a support (48) for the sheet (40) during straightening and that in front of the input (12) has a centering and feeding device (90) for correct feeding of the sheet ( 40) to the transport device (80) is arranged. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass - der der Klemmvorrichtung (30) zugeordnete Antrieb (60) zum Strecken des Blechs (40) in Querrichtung (46) einen Linearantrieb mit einem sich translatorisch bewegenden Abtriebsglied (61) aufweist, - wobei sich das Abtriebsglied (61) translatorisch in einer Vertikalebene bewegt, die in Querrichtung (46) des Blechs (40) sowie senkrecht zu dessen Oberfläche verläuft, - der Linearantrieb (60) um eine senkrecht zu der Vertikalebene verlaufende Achse (63) schwenkbar gelagert ist, - das Abtriebsglied (61) gelenkig mit einem Ende eines Hebel (31) verbunden ist, an dem eine Klemmbacke (32) der Klemmvorrichtung (30) angeordnet ist, die auf einer Oberfläche des Blechs (40) zur Anlage bringbar ist und - der Hebel (31) am gegenüberliegenden Ende an einer ausschließlich in Querrichtung (46) verschiebbaren Halterung (33) für eine Klemmbacke (34) der Klemmvorrichtung (30) angelenkt ist, die auf der gegenüberliegenden Oberfläche des Blechs (40) zur Anlage bringbar ist. Apparatus according to claim 5 or 6, characterized in that - the clamping device (30) associated drive (60) for stretching the sheet (40) in the transverse direction (46) has a linear drive with a translationally moving output member (61), - wherein the driven member (61) translationally moves in a vertical plane which in the transverse direction (46) of the sheet (40) and perpendicular to the surface thereof, - The linear drive (60) is pivotally mounted about an axis perpendicular to the vertical plane extending axis (63), - The output member (61) is pivotally connected to one end of a lever (31) on which a jaw (32) of the clamping device (30) is arranged, which on a surface of the sheet (40) can be brought into contact and - The lever (31) at the opposite end to a solely in the transverse direction (46) displaceable holder (33) for a jaw (34) of the clamping device (30) is articulated, which on the opposite surface of the sheet (40) can be brought into abutment , Vorrichtung nach einem der Ansprüche 5 oder 6, dadurch gekennzeichnet, dass
der der Klemmvorrichtung (30) zugeordnete Antrieb (50) zum Strecken des Blechs (40) insbesondere in Längsrichtung (45) an einer ersten Klemmbacke (35) der Klemmvorrichtung (30) angreift, die auf einer Oberfläche des Blechs (40) zur Anlage bringbar ist,
die Klemmvorrichtung (30) eine zweite Klemmbacke (36) aufweist, die auf der gegenüberliegenden Oberfläche des Blechs (40) zur Anlage bringbar ist,
und die Vorrichtung Spannmittel aufweist, um die gegenüberliegenden Klemmbacken (35, 36) gegeneinander zu verspannen.Device according to one of claims 5 or 6, characterized in that
the clamping device (30) associated drive (50) for stretching the sheet (40) in particular in the longitudinal direction (45) on a first jaw (35) of the clamping device (30) engages on a surface of the sheet (40) for conditioning is
the clamping device (30) has a second jaw (36) engageable on the opposite surface of the sheet (40),
and the device comprises tensioning means for clamping the opposed jaws (35, 36) against each other. Vorrichtung nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass jeder Antrieb (50, 60) als Mittel zum Erfassen der Istwerte der Streckung des Blechs (40) einen Wegsensor umfasst.Device according to one of claims 5 to 8, characterized in that each drive (50, 60) as a means for detecting the actual values of the extension of the sheet (40) comprises a displacement sensor. Vorrichtung nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass die Zentrier- und Zuführeinrichtung (90) mehrere Führungsrollen (92) aufweist, die jeweils um eine in Bezug zur Oberfläche des Blechs (40) vertikale Achse drehbar sind und der Abstand zwischen den vertikalen Achsen (53) einstellbar ist.Device according to one of claims 5 to 9, characterized in that the centering and feeding device (90) comprises a plurality of guide rollers (92) which are each rotatable about a relative to the surface of the sheet (40) vertical axis and the distance between the vertical axes (53) is adjustable.
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WO2021069239A1 (en) * 2019-10-11 2021-04-15 Sms Group Gmbh Device for stretching a metal semi-finished product in the form of individual plates along a stretching section with a stretching frame, and method for stretching a metal semi-finished product using the device

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CN114514080A (en) * 2019-10-11 2022-05-17 Sms集团有限公司 Device for drawing a metal blank in the form of a single sheet along a drawing line with a drawing frame and method for drawing a metal blank using said device

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