EP0785833B9 - Procede et dispositif de faconnage de bandes - Google Patents

Procede et dispositif de faconnage de bandes Download PDF

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Publication number
EP0785833B9
EP0785833B9 EP95933523A EP95933523A EP0785833B9 EP 0785833 B9 EP0785833 B9 EP 0785833B9 EP 95933523 A EP95933523 A EP 95933523A EP 95933523 A EP95933523 A EP 95933523A EP 0785833 B9 EP0785833 B9 EP 0785833B9
Authority
EP
European Patent Office
Prior art keywords
strip
cutter device
connecting portion
die
cutting
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.)
Expired - Lifetime
Application number
EP95933523A
Other languages
German (de)
English (en)
Other versions
EP0785833B1 (fr
EP0785833A1 (fr
Inventor
John Midland Industrial Holdings Limited HAYWARD
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.)
Banro Holdings PLC
Original Assignee
Banro Holdings PLC
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Filing date
Publication date
Application filed by Banro Holdings PLC filed Critical Banro Holdings PLC
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Publication of EP0785833B1 publication Critical patent/EP0785833B1/fr
Application granted granted Critical
Publication of EP0785833B9 publication Critical patent/EP0785833B9/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers

Definitions

  • This invention relates to a method of and apparatus for the production of articles in continuous succession by forming from strip material and parting-off the formed articles from the strip.
  • a special parting-off head is required to support the particular profile of the formed article to enable parting-off to be carried out without deformation or collapse of the article.
  • the head has to be modified or interchanged with another to accommodate the new product, giving rise to a very significant "stand-still" time for the machine, possibly of several hours, while the conversion takes place.
  • Similar problems arise when changing the forming tools, such as rolls, particularly when the channel-shaped profile to be formed has its free edges turned inwardly parallel to its base, requiring additional tools to produce the necessary forming.
  • German Patent No. 61061 discloses the formation of profiles from strip material in which the lengths of the individual profiles are delimited by the formation of transverse impressions on the strip prior to the forming operation, and subjecting the formed profiles to a bending force applied by an array of rollers, causing separation of the profiles by breakage along the transverse impressions.
  • US-A-4,553,418 discloses forming identical workpieces from metal strip material by roller forming and punching to leave successive workpieces connected together by strap-like portions of the strip which are subsequently removed by shearing to separate the workpieces.
  • An object of the invention is to provide a method of producing articles, such as generally channel-shaped ducting, studding and the like, which enables parting-off of the differently shaped and/or sized articles to be performed without substantial modification to the parting-off head, as well as apparatus for carrying out the method and in which the forming tools may be readily modified for changing the shape and/or size of the product.
  • a method of producing articles in continuous succession by forming from strip material comprises the combination of features according to claim 1.
  • the or each connecting portion is formed with the strip stationary and, conveniently, prior to commencement of the forming operation.
  • cutting through the strip is effected on a stationary part of the strip during the performance of the forming operation on another moving part of the strip.
  • apparatus for carrying out the method comprises the combination of features according to claim 10.
  • parting-off is effected on the moving strip by means of the cutting unit which is conveniently accelerated to the speed of the moving strip prior to parting-off.
  • coated steel strip 1 is supplied from a drum 2 which is driven in rotation by a suitable conventional drive means 3, such as an electric motor, in order to unwind the strip in use.
  • the strip is first fed through a succession of operational stations A, B, C, at which various operations are performed on the strip, as will be described hereafter. Feeding of the strip through the stations A, B, C is effected by a pair of feed rollers 2A driven intermittently under computer control to bring successive locations on the strip beneath the stations A, B, C at which operations are performed while the strip is stationary.
  • Alternative locations for the rollers 2A are shown in broken lines respectively at either end of the stations A, B, C, the chosen location depending upon whether the strip is to be pushed or pulled through the stations.
  • the strip is then fed through a series of forming rolls, indicated collectively by the reference 4, which act upon the strip in conventional manner to form it into a desired profile, such as a part-rectangular channel, of which the free longitudinal edges may be inwardly or outwardly turned.
  • each roll has an upper roll 4A and a lower roll 4B, the rolls being arranged in pairs transversely of the longitudinal direction of the strip, as illustrated in Figure 2.
  • Each roll 4A, 4B is carried on a bed 5 mounted on a main frame 6 for adjustment in opposed directions transversely of the frame. Adjustment may be effected by any suitable means such as screw devices or fluid-actuated cylinders (not shown).
  • the rolls 4A, 4B forming the sides of the channel relative to the base are all mounted on the respective beds 50 for simultaneous adjustment as a group at either side of the strip, although they may be sub-divided, if required, depending upon the particular form of the article to be produced.
  • Some of the rolls, indicated at 5 in Figure 1 and each having a pair of rolls 5A, 5B, provide additional forming to turn inwardly the free edges of the channel. In this embodiment of the invention, these rolls are arranged for independent movement relative to the remaining rolls.
  • Figure 3 shows one possible arrangement for this, wherein the rolls 5A, 5B are mounted on beds 70 distinct from the beds 50 of Figure 2 and movable transversely of the frame 6 by, for example, hydraulic cylinders 8, which may be remotely controlled, so that the rolls 5A, 5B may be brought into or out of action separately from the remaining rolls, depending upon whether the product to be formed has in turned edges or not.
  • hydraulic cylinders 8 which may be remotely controlled, so that the rolls 5A, 5B may be brought into or out of action separately from the remaining rolls, depending upon whether the product to be formed has in turned edges or not.
  • the formed strip leaving the forming rolls requires parting-off into desired lengths and this is effected at a parting-off station by a die 9 cooperating with a cutting device 10. It is advantageous, for continuity of production, to perform the cutting operation on the moving strip, for which purpose it is necessary prior to each cutting operation to accelerate the die 9 to match the speed of travel of the strip.
  • the die is coupled to a drive device, illustrated as a screw 11 driven, for example, by an electrical stepper motor 12 which, under automatic computer control, accelerates the die to the required speed and returns it to its starting position after the parting-off operation.
  • the parted off product sections are fed onto a run-out table 13 which can include means 14 for moving the products off the table surface to one side or the other, at will.
  • the strip is partially severed prior to completion of forming by the rollers 4, 5 and preferably prior to the commencement of such forming, by cutting widthwise through the entire thickness of the strip so as to leave successive strip portions 1A, 1B, each of the required length, connected together by only a small localised connecting portion or lug, or possibly a plurality thereof.
  • the partial severing of the strip which takes place at station C, can be effected in a plurality of ways, of which three alternatives are illustrated in Figures 4A to 4C.
  • Each manner of partial severing leaves in the strip one or more gaps 14 and one or more connecting lugs 15 between the successive strip portions 1A, 1B.
  • the preferred manner of severing the strip is that shown in Figure 4A and will be used to illustrate the performance of the method using the apparatus of the invention in the following description.
  • Strip 1 unwound from the reel 2 is allowed to form a loop L1 prior to being fed through the stations A, B and C.
  • This allows for the intermittent feeding of the strip passing through these stations, by the feed rollers 2A, the strip being stopped momentarily, as governed by suitable automatic computer controlled timing means applied to the roller drive, to enable the necessary functions to be completed at stations A, B and C.
  • Tools arranged at stations A and B can, for example, perforate the strip where required, and a partial severing operation is performed at station C leaving successive lengths of strip 1A, 1B spaced by the gaps 14 and connected only by the remaining lug 15.
  • the strip is once again set in motion and forms a second loop L2 prior to entering the rolls 4 so that the strip passing through the rolls can remain in a continuously moving state, even when the strip is stopped at stations A, B and C.
  • the flat strip 1 is progressively formed by the rolls 4 and 5 to produce a succession of channel-shaped articles each, in the particular form illustrated, having inwardly turned longitudinal upper edges.
  • the formed articles leaving the rolls 4 and 5 approach a cutting station to be separated by the cutter 10 cooperating with the die 9.
  • the die 9 is accelerated by the stepper motor 12 and screw drive 11 to the speed of the travelling strip, prior to separating successive articles by severing the connecting lug 15 between them while the articles continue in motion.
  • Initiation of movement of the die 9 is effected in response to sensing the presence of the gap 14 between successive articles by means of sensors 20, preferably of an optical or infra-red type, signals from which are fed to the controlling computer which then initiates acceleration of the die and cutter assembly by way of the screw 11 and motor 12.
  • the thickness of the cutting blade is substantially the same as the width of the slot 14, so that the blade is effectively guided during its movement through the slot.
  • the lower edge 21 of the blade forms the cutting edge and this is bounded by a pair of ears 22 which are spaced by substantially the width of the lug 15 so that the lug is embraced by the ears during the initial part of the descent of the blade for accurate location of the blade relative to the lug.
  • the die 9 has a degree of free movement in the direction of strip movement.
  • the die is provided with a slot 23, which again is of substantially the same width as the blade thickness, and this enables a final location of the blade relative to the die and lug to be effected as the ears 22 enter the slot 23, causing a small longitudinal adjustment of the die to take place, if necessary, prior to the final downward movement of the blade 10 to effect parting-off of the articles.
  • the articles to be severed are supported adjacent the lug by a plain flat surface 23A of the die 9 surrounding the slot 23, obviating the need for complex support apparatus.
  • the timing of the cut in relation to the various other movements and adjustments is effected by the controlling computer.
  • a severed article is illustrated at P ( Figures 1 and 5) and this falls onto a run-off table 13 from which it may be removed by an ejector mechanism in the form of one or more projections 24 extending radially from a body 14 carried by a drive shaft 25 rotatable in one direction or the other, again under the control of the computer, to eject an article laterally of the table to one side or the other thereof.
  • the direction of rotation of the shaft may be computer controlled to enable one or more articles to be ejected at one side of the table, followed by ejection of one or more articles at the opposite side of the table.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Metal Rolling (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Claims (19)

  1. Procédé de production d'articles dans une succession continue par formage à partir d'un matériau en bande, comprenant un découpage complet à travers la bande (1) dans une direction de la largeur, avant l'achèvement du formage, de sorte à que les parties de bande adjacentes (1A, 1B) sont reliées uniquement par une partie de raccordement localisée (15), et de séparation d'une paire d'articles formés successivement (P) par détachement de la ou de chaque partie de raccordement (15) par l'intermédiaire d'une unité de coupe comprenant un dispositif de coupe (10) et une filière (9) à coopération, la filière comportant une ouverture (23) ayant une largeur pratiquement égale à l'épaisseur du dispositif de coupe pour recevoir le dispositif de coupe (10), le procédé étant caractérisé par l'entrée d'au moins une partie en saillie (22) du dispositif de coupe dans l'ouverture (23) avant la séparation des articles (P) par l'intermédiaire de la coopération entre le dispositif de coupe et la filière.
  2. Procédé selon la revendication 1, dans lequel la ou chaque partie de raccordement (15) est formée lorsque la bande (1) est stationnaire.
  3. Procédé selon les revendications 1 ou 2, dans lequel la partie de raccordement (15) est formée avant de commencer l'opération de formage.
  4. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel ledit découpage à travers la bande (1) est réalisé sur une partie stationnaire de la bande au cours de l'exécution de l'opération de formage sur une autre partie en déplacement de la bande.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel le détachement de la partie de raccordement (15) est réalisé sur la bande en déplacement.
  6. Procédé selon la revendication 5, dans lequel l'unité de coupe est accélérée en vue d'une adaptation à la vitesse de la bande (1) avant le détachement de la partie de raccordement (15).
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel ledit découpage à travers la bande est réalisé de sorte à laisser une seule partie de raccordement localisée (15) agencée en général au centre de la bande (1).
  8. Procédé selon l'une quelconque des revendications 1 à 5, dans lequel ledit découpage à travers la bande est réalisé de sorte qu'un espace (14) est établi entre les extrémités adjacentes d'articles successifs (P), le dispositif de coupe (10) ayant une épaisseur correspondant pratiquement à la largeur dudit espace, de sorte que le dispositif de coupe est guidé pendant son déplacement dans l'espace (14) avant le détachement de la ou de chaque partie de raccordement (15).
  9. Procédé selon l'une quelconque des revendications 1 à 8, dans lequel le détachement de la ou de chaque partie de raccordement (15) est réalisé pendant qu'une partie de la bande formée adjacente à la partie (15) est supportée sur une surface, la partie de raccordement n'étant pas supportée.
  10. Dispositif destiné à l'exécution du procédé selon l'une quelconque des revendications 1 à 9, comprenant un moyen de formage (4, 5) pour former la bande selon un profil voulu, un moyen (C) pour découper entièrement la bande (1) dans une direction de la largeur, avant l'achèvement du formage, de sorte que les parties de bande adjacentes (1A, 1B) sont reliées uniquement par au moins une partie de raccordement localisée (15), et un moyen (9, 10) pour séparer une paire d'articles formés successivement (P) par détachement de la ou de chaque partie de raccordement (15), ledit moyen destiné au détachement comprenant une unité de coupe sous forme d'un dispositif de coupe (10) et une filière (9), la filière comportant une ouverture (23) ayant une largeur pratiquement égale à l'épaisseur du dispositif de coupe pour recevoir le dispositif de coupe (10), caractérisé en ce que le dispositif de coupe comporte au moins une partie en saillie (22) et en ce qu'en service ladite au moins une partie en saillie (22) rentre dans l'ouverture de la filière (23) avant la séparation des articles (P) par l'intermédiaire de la coopération entre le dispositif de coupe et la filière.
  11. Dispositif selon la revendication 10, comportant des moyens d'actionnement (2A) pour faire avancer la bande (1) par intermittence entre les opérations de coupe d'une distance égale à la longueur de l'article détaché (P).
  12. Dispositif selon la revendication 11, dans lequel le moyen d'entraínement est constitué par une paire de rouleaux opposés (2A).
  13. Dispositif selon l'une quelconque des revendications 10 à 12, comportant des moyens (11, 12) pour accélérer l'unité de coupe en service en vue de l'adaptation à la bande en déplacement avant le détachement des articles en déplacement.
  14. Dispositif selon l'une quelconque des revendications 10 à 13, dans lequel une arête de coupe (21) du dispositif de coupe (10) est délimitée par une paire de pattes en saillie espacées (22), de sorte qu'en service les pattes entourent une partie de raccordement (15) avant l'opération de coupe, afin d'assurer un positionnement précis du dispositif de coupe (10) par rapport à la partie de raccordement (15).
  15. Dispositif selon l'une quelconque des revendications 10 à 14, dans lequel l'ouverture dans la filière (9) est une fente (23) ayant pratiquement les mêmes dimensions de section transversale qu'une extrémité opposée du dispositif de coupe (10), la filière pouvant se déplacer pour permettre le positionnement longitudinal de la filière par rapport au dispositif de coupe pendant l'entrée du dispositif de coupe dans ladite fente (23).
  16. Dispositif selon l'une quelconque des revendications 10 à 15, dans lequel la filière comporte une surface (23A) supportant en service une partie de la bande formée près d'une partie de raccordement (15), la partie (15) étant située au-dessus de l'ouverture (23) lorsque les pattes (22) du dispositif de coupe entourent la partie de raccordement (15) et sont engagées dans l'ouverture (23).
  17. Dispositif selon l'une quelconque des revendications 10 à 16, dans lequel les moyens de formage sont des rouleaux (4A, 4B, 5A, 5B), et comportant des moyens pour ajuster certains des rouleaux par rapport à d'autres en vue de modifier le format de l'article formé sans désassembler pratiquement les rouleaux.
  18. Dispositif selon la revendication 17, dans lequel les moyens d'ajustement des rouleaux sont actionnés par un fluide.
  19. Dispositif selon les revendications 17 ou 18, dans lequel les moyens d'ajustement des rouleaux peuvent être actionnés à distance.
EP95933523A 1994-10-15 1995-10-10 Procede et dispositif de faconnage de bandes Expired - Lifetime EP0785833B9 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9420832 1994-10-15
GB9420832A GB9420832D0 (en) 1994-10-15 1994-10-15 Strip forming method and apparatus
PCT/GB1995/002397 WO1996011758A1 (fr) 1994-10-15 1995-10-10 Procede et dispositif de faconnage de bandes

Publications (3)

Publication Number Publication Date
EP0785833A1 EP0785833A1 (fr) 1997-07-30
EP0785833B1 EP0785833B1 (fr) 2002-02-06
EP0785833B9 true EP0785833B9 (fr) 2002-11-13

Family

ID=10762915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95933523A Expired - Lifetime EP0785833B9 (fr) 1994-10-15 1995-10-10 Procede et dispositif de faconnage de bandes

Country Status (6)

Country Link
EP (1) EP0785833B9 (fr)
CN (1) CN1168647A (fr)
AT (1) ATE212883T1 (fr)
DE (1) DE69525357D1 (fr)
GB (1) GB9420832D0 (fr)
WO (1) WO1996011758A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818234A1 (de) * 1998-04-23 1999-10-28 Volkswagen Ag Rollprofiliereinrichtung zur Herstellung von Roll- oder Walzprofilelementen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068336A (en) * 1960-11-23 1962-12-11 Continental Can Co Induction heating cut-off means
FR2050833A5 (en) * 1969-06-26 1971-04-02 Perrin & Cie Sa Ets Profiled metal of a given length made from - sheet material

Also Published As

Publication number Publication date
WO1996011758A1 (fr) 1996-04-25
DE69525357D1 (de) 2002-03-21
ATE212883T1 (de) 2002-02-15
EP0785833B1 (fr) 2002-02-06
CN1168647A (zh) 1997-12-24
EP0785833A1 (fr) 1997-07-30
GB9420832D0 (en) 1994-11-30

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