EP4041470B1 - Dispositif d'étirage d'un produit métallique semi-fini sous forme de plaques individuelles le long d'une section d'étirage au moyen d'un cadre tendeur, et procédé d'étirage d'un produit métallique semi-fini au moyen du dispositif - Google Patents

Dispositif d'étirage d'un produit métallique semi-fini sous forme de plaques individuelles le long d'une section d'étirage au moyen d'un cadre tendeur, et procédé d'étirage d'un produit métallique semi-fini au moyen du dispositif Download PDF

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Publication number
EP4041470B1
EP4041470B1 EP20781473.2A EP20781473A EP4041470B1 EP 4041470 B1 EP4041470 B1 EP 4041470B1 EP 20781473 A EP20781473 A EP 20781473A EP 4041470 B1 EP4041470 B1 EP 4041470B1
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EP
European Patent Office
Prior art keywords
stretching
plate
clamping head
finished product
clamping
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.)
Active
Application number
EP20781473.2A
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German (de)
English (en)
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EP4041470A1 (fr
Inventor
Stefan LAUTH
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.)
SMS Group GmbH
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SMS Group 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
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4041470A1 publication Critical patent/EP4041470A1/fr
Application granted granted Critical
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Classifications

    • 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
    • B21D25/04—Clamping arrangements
    • 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
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers

Definitions

  • the invention relates to a device for stretching a metal semi-finished product in the form of individual plates along a stretching section with a stretching frame, comprising pressure columns extending in the axial direction of the stretching section, a first clamping head in which a first narrow side of the semi-finished product to be stretched can be clamped and by means of stretching cylinders is axially displaceable, and a second clamping head, in which the second narrow side of the semi-finished product to be stretched can be clamped.
  • the invention further relates to a method for stretching a metal semi-finished product in the form of individual plates along a stretching section using the device described above.
  • Plate stretchers and plate stretching methods of the type described above are known in the prior art, for example from the publications DE 10 2016 105 306 A1 and DE 10 2015 214 207 A1 or FR 1 538 250 A .
  • Such plate stretchers generally have two clamping heads directed towards one another, which can be displaced relative to one another in order to apply a clamping force directed along a stretching direction. They are used for stretching and/or straightening rolled or pressed material, in particular for stretching and/or straightening individual sheets or plates that are clamped or wedged in the clamping heads. Depending on the design of the panel connector, both clamping heads can be moved during stretching. However, arrangements are often found in which a fixed clamping head and a opposite one movable clamping head are provided.
  • Such an arrangement is, for example, from DE 10 2015 14 207 A1 known, in which the movable clamping head can be moved via hydraulic stretching cylinders and stretching rods, whereas the fixed clamping head comprises a carriage which can be locked relative to pressure column elements of the stretching frame. Locking in different positions is desirable because when stretching individual plates or sheets, unlike the quasi-continuous straightening of sheets wound into coils, different workpiece lengths or plate lengths or sheet lengths are worked and the stretching frame must be adjustable accordingly.
  • Methods and devices for straightening metal sheets that are wound into coils are, for example, from EP 1 923 150 B1 and the US 2002/0104360 A1 known.
  • Known plate stretchers are loaded and unloaded with plates from above using a crane system.
  • the clamping heads must first be set to a dimension larger than the plate to be stretched.
  • the clamping heads then move together and feed the plate to the clamping devices integrated into the clamping heads.
  • the clamps are opened after the stretching process and the clamping heads are moved back to a size larger than the stretched plate.
  • This procedure has the disadvantage that a relatively large stroke of the stretching cylinder is required since the clamping heads have to be set to a dimension that is greater than the length of the plate to be stretched.
  • the non-productive times of the stretching process are high compared to the time required for stretching. Overall, the required cycle time is relatively long.
  • a method and a device for leveling rectangular sheets is, for example, from EP 2 446 979 A1 known.
  • a stretching device for sheet metal with three clamping heads is from the US 2011/0296898 A1 known.
  • the stretching device described there comprises a fixed clamping head and two movable clamping heads, which can be moved relative to one another and together with respect to the fixed clamping head.
  • the fixed clamping head includes a first window through which the pulling metal sheets can be passed through and in which the metal sheet can be fixed, whereas the second clamping head comprises a second window through which the metal sheet can be passed and in which the metal sheet can be clamped.
  • the stretching device further comprises a receiving structure to which an actuator for the movable clamping head is attached. The receiving structure is passed through the window of the movable clamping head to ensure that the loads on the receiving structure are minimized.
  • the ones in the US 2011/0296898 A1 The stretching device described includes a receiving structure or a frame that is designed to absorb low stretching forces.
  • the invention is based on the object of providing a plate stretcher of the type mentioned at the beginning and a corresponding method in which the non-productive times are reduced and the overall cycle time is therefore optimized.
  • a device for stretching a metal semi-finished product in the form of individual plates along a stretching section with a stretching frame.
  • the device comprises pressure columns extending in the axial direction of the stretching section, a first clamping head in which a first narrow side of the semi-finished product to be stretched can be clamped and which can be axially displaced by means of stretching cylinders, and a second clamping head in which the second narrow side of the semi-finished product to be stretched can be clamped is.
  • the device according to the invention or the plate stretcher according to the invention is characterized in particular by the fact that at least one axial feed and one axial outlet of the stretching frame are provided and that the clamping heads are designed in such a way that the semi-finished product to be stretched is axially passed through at least one of the clamping heads , can preferably be carried out by both clamping heads.
  • the plates can therefore be fed in and removed in the direction of the force applied during stretching.
  • At least one clamping head has at least one clamping head mouth which is open in the stretching direction, so that the plate to be stretched can be inserted from the outside in the axial direction into the relevant clamping head mouth.
  • the clamping head mouths are preferably facing away from one another in the stretching frame in the axial direction of the stretching section and at least one clamping head is designed such that a plate can be passed through the clamping head in question, so that the plate can be positioned between the clamping heads.
  • both clamping heads can be moved while a plate is being stretched. It is preferably provided that the second or the first clamping head is locked or lockable relative to pressure column elements of the stretching frame.
  • the stretching frame can have a locking device which, for example, corresponds to the one in the DE 10 2015 214 207 A1 is described.
  • the clamping heads can have means for clamping and/or wedging the workpiece or plate in a known manner.
  • the axial feed expediently comprises a feed roller table and the axial outlet includes an outlet roller table.
  • the feed roller table and/or the outlet roller table can comprise driven rollers, so that the feeding of the plate and the exit of the plate can be accomplished in the axial direction of the stretching section.
  • the feed roller table and/or the outlet roller table are height-adjustable in order to be able to position the plate at the average height level of the plate connector or the route level during loading or unloading.
  • the panels to be stretched are usually provided on roller conveyors above the floor.
  • the feed roller table can take over the plate to be stretched at the height level at which it is provided.
  • the feed roller table is then brought up to the relevant clamping head and adjusted to the appropriate height level.
  • the stretched plate is transported away in a similar manner using the exit roller table.
  • a first and a second loading device are provided, the first loading device being arranged on the first clamping head and the second loading device being arranged on the second clamping head, the loading devices each comprising driven rollers.
  • the loading devices enable the height of the plate to be stretched to be positioned, the plate to be centered in the longitudinal axis and the plate to be driven.
  • the plate is preferably conveyed from below by means of driven rollers and with pressure rollers acting from above.
  • the loading devices can each have a centering unit. These can, for example, according to the DE 10 2016 105 306 A1 be carried out in the manner described.
  • At least one transverse straightening press is provided between the first and the second clamping head.
  • the transverse straightening press can be designed so that it applies a force acting perpendicular to the clamping force or stretching force to the plate. This allows the plate in question to be aligned transversely during stretching, so that the plate is prevented from buckling during stretching.
  • several mobile transverse straightening presses are provided, which can be moved along in the stretching direction of the plate during stretching.
  • a centering device can be provided on at least one transverse straightening press, which takes over the centering of the plate when it is fed to the second clamping head.
  • Passing the plate through the first clamping head and feeding the plate to the second clamping head as well as conveying the stretched plate through the second clamping head can be done by means of the first and second loading devices.
  • the plate is expediently directed transversely during stretching by means of at least one transverse straightening press, i.e. H. transverse to the axial extent or transverse to the stretching force acting in the axial direction.
  • At least one transverse straightening press can be moved along in the stretching direction of the plate during stretching.
  • the plate Before being fixed in the clamping heads by means of the first and/or the second loading device, the plate is preferably automatically positioned in a predetermined position within the stretching frame by means of at least one position measuring system.
  • position measuring system For example, light barriers can be installed in the clamping heads to detect the position of the plate. With the position information obtained in this way, the drive of the loading device can position the plate precisely within the stretching frame.
  • the plate stretcher 1 comprises a stretching frame 2 with a first and a second clamping head 3, 4 which can be moved within the stretching frame 2.
  • the stretching frame 2 comprises a first and a second stretching cylinder 5, 6, the first stretching cylinder being located on a first pressure column 7 and the second stretching cylinder 6 is supported on a second pressure column 8.
  • the first and second pressure columns 7, 8 each form the abutment for first and second stretching rods 9, 10 of the first and second stretching cylinders 5, 6.
  • the first and second stretching rods 9, 10 are each aligned with the first and second pressure columns 7, 8 arranged and form the stretching frame 2.
  • the first clamping head can be moved along the stretching rods 9, 10 with the help of the stretching cylinders 5, 6.
  • the stretching cylinders 5, 6 are subjected to a pressure medium, which causes movement of the first clamping head 3 in the axial direction of the stretching section formed by the stretching frame 2 relative to the second clamping head 4.
  • the second clamping head 4 is locked relative to the pressure columns 7, 8, i.e. fixed, whereas the first clamping head 3 is movable relative to the second clamping head 4.
  • the clamping heads 3, 4 each have a clamping head mouth 11.
  • the clamping head mouths face away from one another within the stretching frame 2.
  • the clamping head mouth 11 of the first clamping head 3 is opened in the direction of a feed roller table 12
  • the clamping head mouth 11 of the second clamping head 4 is opened in the direction of an outlet roller table 13.
  • the clamping heads 3, 4 each include clamping jaws 16, which wedge the plate in the stretching direction and which can be opened to pass the plate or the semi-finished product through.
  • Both the feed roller table 12 and the outlet roller table 13 include driven rollers.
  • the first clamping head 3 is assigned a first loading device 14, which is arranged on the side facing the clamping head mouth 11, whereas the second clamping head 4 is assigned a second loading device 15, which is arranged on the side facing away from the clamping head mouth 11.
  • the loading device 14, 15 include driven rollers and effect positioning and centering of the plate within the stretching frame 2.
  • a plate, not shown, is fed from the right to the stretching frame 2 via the feed roller table 12 in the drawings. This plate is then taken over by the first loading device 14 and guided through the clamping head mouth 11 of the first clamping head 3 in a correspondingly centered manner.
  • a first narrow side of the plate (narrow side leading in the conveying direction) is fed to the second clamping head 4 and inserted and fixed in it.
  • the second narrow side of the plate (narrow side lagging in the conveying direction) is or is fixed in the first clamping head 3.
  • the first clamping head 3 is then moved relative to the second clamping head 4, the plate being stretched between the first and the second clamping heads 3, 4.
  • the clamping or wedging of the plate is released and the plate is moved further through the second Clamping head 4 is conveyed through to the outlet roller table 13. Immediately afterwards, another plate can be loaded via the feed roller table 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (12)

  1. Dispositif pour étirer un produit semi-fini métallique sous forme de plaques individuelles le long d'un trajet d'étirage avec un bâti d'étirage (2), comprenant des colonnes de pression (7, 8) s'étendant dans la direction axiale du trajet d'étirage, avec une première et une seconde tête de serrage (3, 4) déplaçables à l'intérieur du bâti d'étirage (2), dans lequel la première tête de serrage (3), dans laquelle un premier côté étroit du produit semi-fini à étirer peut être serré, est déplaçable axialement au moyen de cylindres d'étirage (5, 6), et dans la seconde tête de serrage (4), un second côté étroit du produit semi-fini à étirer peut être serré,
    caractérisé en ce que ledit bâti d'étirage (2) comprend un premier et un second cylindre d'étirage (5, 6), le premier cylindre d'étirage s'appuyant sur la première colonne de pression (7) et le second cylindre d'étirage (6) sur la seconde colonne de pression (8), la première et la seconde colonne de pression (7, 8) formant respectivement la butée pour les première et seconde barres d'étirage (9, 10) des premier et second cylindres d'étirage (5, 6) et étant disposées respectivement en alignement avec les première et seconde colonnes de pression (7, 8) et formant le bâti d'étirage (2), et en ce qu'il est prévu au moins une alimentation axiale et une sortie axiale du bâti d'étirage (2) et en ce que les têtes de serrage (3, 4) sont conçues de manière à ce que le produit semi-fini à étirer puisse passer axialement à travers au moins une tête de serrage (3, 4), de préférence à travers les deux.
  2. Dispositif selon la Revendication 1, caractérisé en ce que l'alimentation axiale comprend un train de rouleaux d'alimentation (12) et la sortie axiale comprend un train de rouleaux d'évacuation (13).
  3. Dispositif selon la Revendication 2, caractérisé en ce que le train de rouleaux d'alimentation (12) et/ou le train de rouleaux d'évacuation (13) comprend des rouleaux entraînés.
  4. Dispositif selon l'une des revendications 2 ou 3, caractérisé en ce que le train de rouleaux d'alimentation (12) et/ou le train de rouleaux d'évacuation (13) sont réglables en hauteur.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé par un premier et un second dispositif de chargement (14, 15), le premier dispositif de chargement (14) étant associé à la première tête de serrage (13) et le second dispositif de chargement (15) étant associé à la seconde tête de serrage (4), les dispositifs de chargement (14, 15) comprenant de préférence des rouleaux entraînés respectifs.
  6. Dispositif selon la Revendication 5, caractérisé en ce que les dispositifs de chargement (14, 15) comportent chacun au moins une unité de centrage.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé en ce qu'il est prévu entre la première et la seconde tête de serrage au moins une presse de dressage transversal, de préférence mobile.
  8. Procédé permettant d'étirer un produit semi-fini métallique sous forme de plaques individuelles le long d'un trajet d'étirage en utilisant un dispositif selon l'une des revendications 1 à 7, caractérisé par les étapes de procédé consistant à :
    - guider une plaque individuelle avec son second côté étroit dans la direction axiale du trajet d'étirage sur la première tête de serrage ;
    - faire passer la plaque à travers la première tête de serrage et amener le second côté étroit de la plaque à la seconde tête de serrage dans la direction axiale du trajet d'étirage,
    - fixer la plaque dans la première et la seconde tête de serrage ;
    - étirer la plaque avec une course prédéterminée jusqu'à une longueur prédéterminée ; et
    - faire passer la plaque étirée à travers la seconde tête de serrage dans la direction axiale du trajet d'étirage.
  9. Procédé selon la revendication 8, caractérisé en ce que les étapes consistant à faire passer la plaque à travers la première tête de serrage et amener le second côté étroit de la plaque à la seconde tête de serrage ainsi que le transport de la plaque étirée à travers la seconde tête de serrage sont effectués au moyen des premier et second dispositifs de chargement.
  10. Procédé selon la revendication 9, caractérisé en ce que la plaque est redressée transversalement pendant l'étirage.
  11. Procédé selon l'une des revendications 8 à 10, caractérisé en ce qu'au moins une presse de dressage transversal est entraînée dans la direction d'étirage du panneau pendant l'étirage.
  12. Procédé selon l'une quelconque des revendications 8 à 11, caractérisé en ce que la plaque, avant d'être fixée dans les têtes de serrage au moyen du premier et/ou du second dispositif de chargement, est positionnée automatiquement dans une position prédéterminée à l'intérieur du bâti d'étirage au moyen d'au moins un système de mesure de position.
EP20781473.2A 2019-10-11 2020-09-25 Dispositif d'étirage d'un produit métallique semi-fini sous forme de plaques individuelles le long d'une section d'étirage au moyen d'un cadre tendeur, et procédé d'étirage d'un produit métallique semi-fini au moyen du dispositif Active EP4041470B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019215676.2A DE102019215676A1 (de) 2019-10-11 2019-10-11 Einrichtung zum Strecken eines metallenen Halbzeugs in Form von einzelnen Platten entlang einer Reckstrecke mit einem Reckgestell sowie Verfahren zum Strecken eines metallenen Halbzeugs unter Verwendung der Einrichtung
PCT/EP2020/076926 WO2021069239A1 (fr) 2019-10-11 2020-09-25 Dispositif d'étirage d'un produit métallique semi-fini sous forme de plaques individuelles le long d'une section d'étirage au moyen d'un cadre tendeur, et procédé d'étirage d'un produit métallique semi-fini au moyen du dispositif

Publications (2)

Publication Number Publication Date
EP4041470A1 EP4041470A1 (fr) 2022-08-17
EP4041470B1 true EP4041470B1 (fr) 2024-02-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20781473.2A Active EP4041470B1 (fr) 2019-10-11 2020-09-25 Dispositif d'étirage d'un produit métallique semi-fini sous forme de plaques individuelles le long d'une section d'étirage au moyen d'un cadre tendeur, et procédé d'étirage d'un produit métallique semi-fini au moyen du dispositif

Country Status (5)

Country Link
US (1) US20230249240A1 (fr)
EP (1) EP4041470B1 (fr)
CN (1) CN114514080A (fr)
DE (1) DE102019215676A1 (fr)
WO (1) WO2021069239A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1538250A (fr) * 1967-09-29 1968-08-30 Schloemann Ag Machine à dresser par traction

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GB893001A (en) * 1960-01-02 1962-04-04 Joshua Bigwood And Son Ltd Improvements in stretching machines for metal strip or sheet
GB1122867A (en) * 1966-07-07 1968-08-07 Bigwood Joshua & Son Ltd Improvements in stretch draw forming
DE1602551A1 (de) * 1967-05-13 1971-03-11 Siempelkamp Gmbh & Co Hydraulische Streckpresse
JPS5325706B2 (fr) * 1974-09-11 1978-07-28
JPS5343866Y2 (fr) * 1975-11-26 1978-10-21
KR100323882B1 (ko) * 1999-12-10 2002-02-08 이계안 버스의 사이드 판넬 인장장치
US6460391B1 (en) 2001-02-07 2002-10-08 Red Bud Industries, Inc. Clamping assembly for sheet metal leveling machine
ES2307403B1 (es) 2006-11-08 2009-10-08 Fagor, S. Coop. Maquina para el estirado de chapas metalicas.
JP4802180B2 (ja) * 2007-12-13 2011-10-26 アイシン高丘株式会社 通電加熱装置及びそれを有する熱間プレス成形装置並びに通電加熱方法
ES2377628B1 (es) * 2009-12-04 2013-03-25 Fagor, S. Coop. Máquina para el estirado de chapas metálicas.
DE102010049648A1 (de) * 2010-10-28 2012-05-03 Maschinenfabrik - Fr. W. Schnutz Gmbh & Co. Kg Verfahren und Vorrichtung zum Planrichten von Lochblechen
CN102152115B (zh) * 2011-01-05 2013-10-30 大连康丰科技有限公司 拉伸矫直一体机
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DE102015214207A1 (de) 2015-07-20 2017-01-26 Sms Group Gmbh Verriegelungsvorrichtung und Plattenstrecker
DE102015014207B4 (de) 2015-11-04 2022-06-15 Audi Ag Vorrichtung und Verfahren zum Aussenden eines Funksignals bezüglich eines Einsatzfahrzeugs auf Einsatzfahrt
CN205146987U (zh) * 2015-12-04 2016-04-13 二重集团（德阳）重型装备股份有限公司 C形板拉伸机
DE102016105306A1 (de) 2016-03-22 2017-09-28 Sms Group Gmbh Plattenstrecker sowie Plattenstreckverfahren
CN109277442B (zh) * 2017-07-21 2023-09-22 中国铁建重工集团股份有限公司 一种f型钢弯曲装置和方法

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Publication number Priority date Publication date Assignee Title
FR1538250A (fr) * 1967-09-29 1968-08-30 Schloemann Ag Machine à dresser par traction

Also Published As

Publication number Publication date
DE102019215676A1 (de) 2021-04-15
EP4041470A1 (fr) 2022-08-17
US20230249240A1 (en) 2023-08-10
CN114514080A (zh) 2022-05-17
WO2021069239A1 (fr) 2021-04-15

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