EP0785833B1 - Verfahren und vorrichtung zum blechformen - Google Patents

Verfahren und vorrichtung zum blechformen Download PDF

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Publication number
EP0785833B1
EP0785833B1 EP95933523A EP95933523A EP0785833B1 EP 0785833 B1 EP0785833 B1 EP 0785833B1 EP 95933523 A EP95933523 A EP 95933523A EP 95933523 A EP95933523 A EP 95933523A EP 0785833 B1 EP0785833 B1 EP 0785833B1
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
English (en)
French (fr)
Other versions
EP0785833B9 (de
EP0785833A1 (de
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
Publication of EP0785833A1 publication Critical patent/EP0785833A1/de
Application granted granted Critical
Publication of EP0785833B1 publication Critical patent/EP0785833B1/de
Publication of EP0785833B9 publication Critical patent/EP0785833B9/de
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)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Metal Rolling (AREA)

Claims (19)

  1. Verfahren zur Herstellung von Artikeln in einer kontinuierlichen Folge durch Formung von Streifenmaterial, das folgendes umfaßt: vollständiges Durchschneiden des Streifen (1) in einer Breitenrichtung, bevor die Formung abgeschlossen ist, so daß aneinandergrenzende Streifenabschnitte (1A, 1B) nur durch wenigstens einen lokalisierten Verbindungsabschnitt (15) miteinander verbunden bleiben, und Abtrennen eines Paares von aufeinanderfolgenden geformten Artikeln (P) durch Durchtrennen des oder jedes Verbindungsabschnitts (15) unter Anwendung einer Schneideinheit, die einen zusammenwirkenden Schneidmechanismus (10) und ein Unterwerkzeug (9) umfaßt, wobei das Unterwerkzeug eine Öffnung (23) von im wesentlichen derselben Breite wie die Dicke des Schneidmechanismus' hat, um darin den Schneidmechanismus (10) aufzunehmen, wobei das Verfahren dadurch gekennzeichnet ist, daß der Eintritt wenigstens eines vorspringenden Abschnitts (22) des Schneidmechanismus' in die Öffnung (23) bewirkt wird, bevor die Artikel (P) durch das Zusammenwirken zwischen dem Schneidmechanismus und dem Unterwerkzeug abgetrennt werden.
  2. Verfahren nach Anspruch 1, bei dem der oder jeder Verbindungsabschnitt (15) gebildet wird, während der Streifen (1) stationär ist.
  3. Verfahren nach Anspruch 1 oder Anspruch 2, bei dem der Verbindungsabschnitt (15) vor Beginn des Formungsvorgangs gebildet wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, bei dem das Durchschneiden des Streifens (1) an einem stillstehenden Teil des Streifens während der Durchführung des Formungsvorgangs an einem anderen, sich bewegenden Teil des Streifens ausgeführt wird.
  5. Verfahren nach einem der vorhergehenden Ansprüche, bei dem das Durchtrennen des Verbindungsabschnitts (15) an dem sich bewegenden Streifen ausgeführt wird.
  6. Verfahren nach Anspruch 5, bei dem die Schneideinheit beschleunigt wird, um sie vor dem Durchtrennen des Verbindungsabschnitts (15) der Geschwindigkeit des Streifens (1) anzupassen.
  7. Verfahren nach einem der vorhergehenden Ansprüche, bei dem das Durchschneiden des Streifens so ausgeführt wird, daß ein einzelner, lokalisierter Verbindungsabschnitt (15) verbleibt, der allgemein in der Mitte des Streifens (1) angeordnet ist.
  8. Verfahren nach einem der Ansprüche 1 bis 5, bei dem das Durchschneiden des Streifens auf eine solche Weise ausgeführt wird, daß zwischen aneinandergrenzenden Enden von aufeinanderfolgenden Artikeln (P) ein Spalt (14) gebildet wird, und der Schneidmechanismus (10) eine Dicke hat, die im wesentlichen gleich der Breite des Spaltes ist, so daß der Schneidmechanismus während seiner Bewegung innerhalb des Spaltes (14) geführt wird, bevor er den oder jeden Verbindungsabschnitt (15) durchtrennt.
  9. Verfahren nach einem der Ansprüche 1 bis 8, bei dem das Durchtrennen des oder jedes Verbindungsabschnitts (15) durchgeführt wird, während ein Teil des geformten Streifens angrenzend an den Abschnitt (15) auf einer Oberfläche aufgelagert wird und der Verbindungsabschnitt nicht aufgelagert ist.
  10. Vorrichtung zur Ausführung des Verfahrens nach einem der Ansprüche 1 bis 9, die folgendes aufweist: Formungsmittel (4, 5) zur Formung des Streifens in ein gewünschtes Profil, Mittel (C) zum vollständigen Durchschneiden des Streifens (1) in einer Breitenrichtung, bevor die Formung abgeschlossen ist, so daß aneinandergrenzende Streifenabschnitte (1A, 1B) nur durch wenigstens einen lokalisierten Verbindungsabschnitt (15) miteinander verbunden bleiben, und Mittel (9, 10) zum Abtrennen eines Paares von aufeinanderfolgenden geformten Artikeln (P) durch Durchtrennen des oder jedes Verbindungsabschnitts (15), wobei die Mittel zum Abtrennen eine Schneideinheit in Form eines Schneidmechanismus' (10) und eines Unterwerkzeugs (9) umfassen, wobei das Unterwerkzeug eine Öffnung (23) von im wesentlichen derselben Breite wie die Dicke des Schneidmechanismus' hat, um den Schneidmechanismus (10) aufzunehmen, dadurch gekennzeichnet, daß der Schneidmechanismus mit wenigstens einem vorspringenden Abschnitt (22) versehen ist und daß bei der Arbeit der wenigstens eine vorspringende Abschnitt (22) in die Unterwerkzeug-Öffnung (23) eintritt, bevor die Artikel (P) durch das Zusammenwirken zwischen dem Schneidmechanismus und dem Unterwerkzeug abgetrennt werden.
  11. Vorrichtung nach Anspruch 10, bei der Antriebsmittel (2A) bereitgestellt werden, um den Streifen (1) zwischen den Schneidvorgängen aussetzend um eine Entfernung vorwärts zu bewegen, die gleich der Länge eines abgetrennten Artikels (P) ist.
  12. Vorrichtung nach Anspruch 11, bei der die Antriebsmittel ein Paar gegenüberliegender Rollen (2A) sind.
  13. Vorrichtung nach einem der Ansprüche 10 bis 12, bei der Mittel (11, 12) bereitgestellt werden, um die Schneideinheit bei der Arbeit auf die Geschwindigkeit des sich bewegenden Streifens zu beschleunigen, bevor die sich bewegenden Artikel abgetrennt werden.
  14. Vorrichtung nach einem der Ansprüche 10 bis 13, bei der eine Schneidkante (21) des Schneidmechanismus' (10) durch ein Paar von mit Zwischenraum angeordneten vorspringenden Ösen (22) begrenzt wird, derartig, daß die Ösen bei der Arbeit einen Verbindungsabschnitt (15) vor einem Schneidvorgang umfassen, um so eine genaue Lokalisierung des Schneidmechanismus' (10) im Verhältnis zum Verbindungsabschnitt (15) zu bewirken.
  15. Vorrichtung nach einem der Ansprüche 10 bis 14, bei der die Öffnung im Unterwerkzeug (9) ein Schlitz (23) mit im wesentlichen denselben Querschnittabmessungen wie ein gegenüberliegendes Ende des Schneidmechanismus' (10) ist, wobei das Unterwerkzeug bewegt werden kann, um die Längsausrichtung des Unterwerkzeugs im Verhältnis zum Schneidmechanismus während des Eintritts des Schneidmechanismus' in den Schlitz (23) zu erlauben.
  16. Vorrichtung nach einem der Ansprüche 10 bis 15, bei der das Unterwerkzeuge eine Oberfläche (23A) hat, auf der bei der Arbeit ein Teil des geformten Streifens anschließend an einen Verbindungsabschnitt (15) aufgelagert wird, wobei der Abschnitt (15) über der Öffnung (23) liegt, wenn die Ösen (22) des Schneidmechanismus' den Verbindungsabschnitt (15) umfassen und innerhalb der Öffnung (23) ineinandergreifen.
  17. Vorrichtung nach einem der Ansprüche 10 bis 16, bei der die Formungsmittel Walzen (4A, 4B, 5A, 5B) sind und Mittel bereitgestellt werden, um einige der Walzen im Verhältnis zu anderen einzustellen, um das Format des geformten Artikels zu modifizieren, ohne die Walzen wesentlich zu demontieren.
  18. Vorrichtung nach Anspruch 17, bei der die Walzeneinstellmittel fluid-betätigt sind.
  19. Vorrichtung nach Anspruch 17 oder Anspruch 18, bei der die Walzeneinstellmittel fernbedient werden können.
EP95933523A 1994-10-15 1995-10-10 Verfahren und vorrichtung zum blechformen Expired - Lifetime EP0785833B9 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9420832A GB9420832D0 (en) 1994-10-15 1994-10-15 Strip forming method and apparatus
GB9420832 1994-10-15
PCT/GB1995/002397 WO1996011758A1 (en) 1994-10-15 1995-10-10 Strip forming method and apparatus

Publications (3)

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

Family

ID=10762915

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95933523A Expired - Lifetime EP0785833B9 (de) 1994-10-15 1995-10-10 Verfahren und vorrichtung zum blechformen

Country Status (6)

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

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
EP0785833B9 (de) 2002-11-13
GB9420832D0 (en) 1994-11-30
WO1996011758A1 (en) 1996-04-25
EP0785833A1 (de) 1997-07-30
ATE212883T1 (de) 2002-02-15
DE69525357D1 (de) 2002-03-21
CN1168647A (zh) 1997-12-24

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