EP0759331B1 - Transverse step-by-step transport apparatus of profiles between an extrusion press and a stretcher leveller - Google Patents

Transverse step-by-step transport apparatus of profiles between an extrusion press and a stretcher leveller

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Publication number
EP0759331B1
EP0759331B1 EP95115199A EP95115199A EP0759331B1 EP 0759331 B1 EP0759331 B1 EP 0759331B1 EP 95115199 A EP95115199 A EP 95115199A EP 95115199 A EP95115199 A EP 95115199A EP 0759331 B1 EP0759331 B1 EP 0759331B1
Authority
EP
European Patent Office
Prior art keywords
transverse
clamps
sections
longitudinal
pliers
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
EP95115199A
Other languages
German (de)
French (fr)
Other versions
EP0759331A1 (en
Inventor
Uwe Muschalik
Bernhard Zeuch
Josef Vetten
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 Hasenclever GmbH
SMS Hasenclever Maschinenfabrik GmbH
Original Assignee
SMS Hasenclever GmbH
SMS Hasenclever Maschinenfabrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP95115199A priority Critical patent/EP0759331B1/en
Application filed by SMS Hasenclever GmbH, SMS Hasenclever Maschinenfabrik GmbH filed Critical SMS Hasenclever GmbH
Priority to KR1019980701034A priority patent/KR100287982B1/en
Priority to PCT/DE1996/001452 priority patent/WO1997006902A1/en
Priority to AU70827/96A priority patent/AU713747B2/en
Priority to JP9508814A priority patent/JP3071470B2/en
Priority to US09/011,293 priority patent/US5907968A/en
Publication of EP0759331A1 publication Critical patent/EP0759331A1/en
Application granted granted Critical
Publication of EP0759331B1 publication Critical patent/EP0759331B1/en
Priority to NO980598A priority patent/NO309932B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, 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
    • B21D43/006Feeding elongated articles, such as tubes, bars, or profiles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C35/00Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C35/00Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
    • B21C35/02Removing or drawing-off work
    • B21C35/03Straightening the work

Definitions

  • the metal profiles produced in an extrusion press are taken up by an outlet.
  • Outlet tables in connection with pulling devices (as known for example from EP 0 300 262 B1) or outlet conveyors (as known for example from DE 39 36 177 C2) can be considered as outlets.
  • the profiles are conveyed individually or in groups in the work cycle of the extruder via a cooling bed to a stretch leveler, and after they have been straightened up to a longitudinal conveyor, which feeds the profiles to a saw or scissors for division into commercial lengths and finally to a stacking device.
  • the temperature of aluminum profiles is, for example, in the range from 450 ° to 500 ° C.
  • asymmetrical profiles or groups of profiles that tend to warp are detected on the outlet table or outlet conveyor at the ends of tongs of a pair of tongs, which run along the transverse conveyor and hold the profiles under a longitudinal tension that is completely or largely excluded from warping and the profile or insert the closed group of profiles into the pliers of the stretch leveler and only be released after the pliers of the stretch leveler have taken over the clamping of the profile or profiles.
  • two or more pairs of pliers are provided, which must be offset in the longitudinal direction of the profile at a distance of at least one clamping jaw depth in order to be able to be moved in their overlapping working areas, the pliers being alternately offset in order to avoid the end pieces affected by the clamping keep the profiles short.
  • the tongs can be returned to their starting position from an end position, in which they transfer a profile or a group of profiles to another pair of tongs or to the tongs of the stretch leveler, the tongs are supported by vertical columns that can be adjusted vertically in guides are, the guides on horizontal rails can be moved in the transverse conveying direction.
  • the profiles always lie with one end in the line given by the saw or scissors in the press outlet and the stationary part of the stretch leveler, so that the horizontal rails for guiding the tongs holding the profiles at these ends can be arranged in a stationary manner.
  • the pliers holding the profiles at the other ends must, like the second part of the stretch leveler, be adjusted to the profile length set in the respective pressing program and also to compensate the shrinkage associated with the cooling of the profiles can be set up, for which purpose each tongs and the transverse rail guiding them are assigned a carriage guided in horizontal longitudinal rails and movable in the longitudinal direction of the profile.
  • the suspension of the wagons requires a platform that supports the longitudinal rails and extends beyond the run-out of the extrusion press and the cross conveyor into the area of the stretch leveler in a width corresponding to the length of the carriageway of the wagons.
  • This platform is not only of considerable construction expense but also of considerable disadvantage because the accessibility of the cross conveyor from above is severely restricted by the overhanging platform.
  • the object of the invention is to provide a device for the gradual transverse transport of profiles, which is provided with pliers of pairs of pliers, which alternately grasp the profiles or groups of profiles during the transverse transport from the outlet behind the extrusion press to the stretch leveler, and are stretched by tensile stress keep improving with regard to the structural complexity and the accessibility of the cross conveyor.
  • the cross rails guiding the tongs are designed as bridges spanning the transverse transport along their length, with trolleys as tongs guides, which are supported at their ends by raised longitudinal members arranged parallel to the press outlet, of which at least the bridges that can be adjusted in the longitudinal direction of the profile to compensate for the profile lengths can be moved with bridge carriages on the longitudinal members.
  • electromechanical linear linear drives are provided for the closing of the pliers, for the vertical lifting of the pliers columns in their guides and possibly for the longitudinal movement of the bridges in their bridge carriages or the pliers guides in their trolleys.
  • the clamped profile or the clamped profile group rests on the transverse conveyor belts during the transverse transport, which is why, according to a further advantageous feature of a development of the invention, the trolleys for the pliers are driven synchronously with the transverse conveyor belts by dynamic servomotors.
  • 1 is the extrusion press.
  • a discharge conveyor 2 extends in the longitudinal direction X, to which a single- or double-acting pull-out device 3 is assigned, the two grippers of which, if necessary, alternately grip and pull off a profile or a profile group that runs out of the extruder.
  • profile group is used in the following description, this also stands for a single profile.
  • a pair of scissors 4 and a saw 5 are provided in order to cut the extruded profile group to the desired length of maximum L max and minimum L min .
  • the cut-to-length profile groups are gradually deposited in their area of effect by separately controllable cross conveyors 6 and 7 from the outfeed conveyor 2 onto a first cooling zone 8 and in time with a second cooling zone and then introduced into the axis 10 of a stretching device which results from a stationary stretching stroke Executing clamping head 11 and a counter head 12 adjustable to the intended length of the profile groups.
  • the profile groups are conveyed out of the stretching device by a cross conveyor 13 except for a longitudinal conveyor 14, which takes them over and conveys them to the finishing line 15.
  • the pliers consist (see FIG. 2) of a lower jaw 16 and an upper jaw 17, the lower jaw 16 being connected at right angles to a column 18, while the upper jaw 17 is connected to a sleeve 19 and with it along the column 18 can be moved to close and open the pliers.
  • the column 18 is in turn vertically displaceable in a guide 20 which is designed as a trolley and can be moved in the transverse direction along one of the bridges 21, 22, 23 and 24. The stroke of the column 18 in the guide 20 is limited at the bottom by a collar 18a.
  • a linear lifting gear 25 is supported on the guide 20 via a bracket 20a, which acts on the upper jaw 17 to open and close the pliers.
  • the sleeve 19 of the upper jaw 17 strikes against a stop 18b on the column 18, so that this and thus also the lower jaw 16 is raised so far that it is about the intended maximum profile height is higher above the upper edge of the cross conveyor 6 and 7 and can be moved across the profiles.
  • the distance of the bridges 23/24 from the bridges 21/22 must be set according to the intended profile length.
  • the bridges 21, 22, 23 and 24 span the entire cross transport from the outfeed conveyor 3 to the longitudinal conveyor 14 with the first cross conveyor 6, the second cross conveyor 7 and the third cross conveyor 13 and are of raised longitudinal beams 26 for the bridges 21 and 22 and longitudinal beams 27 supported for the bridges 23 and 24 and longitudinally movable with the bridge carriage 28.
  • the longitudinal beams 27 are provided in length in accordance with the difference between the largest and smallest Dimension profile length.
  • the longitudinal members 26 are only to be provided for a short travel of the bridges 21 and 22 if the counter head 12 of the stretch leveler is not continuously adjustable, but at a distance from detents, which is then compensated for in the stroke of the clamping head 11 of the stretch leveler, otherwise the bridges 21 and 22 can be firmly connected to the side members 26.
  • the shrinkage associated with the cooling automatically creates a tensile stress in the profile groups.
  • at least one pair of pliers of each pair of pliers can be moved in the longitudinal direction of the clamped profile group with a force corresponding to the desired tension, for example by moving the bridge carrying the pliers.
  • a suitable bridge carriage is shown in FIG. 9.
  • the bridge carriage 28 can be locked with respect to the longitudinal beam 27 by means of a clamping device 29 and is provided with a slot 30 in which a slide piece 31 connected to the bridge 23 can be moved in the longitudinal direction.
  • a linear lifting gear 32 displaces the bridge 23 with its slide 31 in the slot 30, this displacement taking place in synchronism in the two bridge carriages belonging to a bridge and the tensile stress exerted on the profile group being applied by the linear lifting gear in appropriate proportions.
  • the freedom of movement of the sliders 31 in the slots 30 is sufficiently dimensioned for the dimension resulting from the shrinking and stretching of the profiles.
  • the bridge carriages are moved via cable pulls 33 after loosening the clamping device 29 in synchronism with the two bridge carriages assigned to a bridge and provided with wheels 34.
  • the pliers I and II are arranged on opposite sides of the bridges 23 and 24, so that the jaws 16 and 17 of the pliers I in the transverse direction with the jaws of the counter head 12 of the stretching device and the jaws 16 and 17 the pliers II with a small distance outside this escape to keep the end pieces affected by the clamping of the profiles as short as possible.
  • the opposing tongs to the tongs I and II of the pair of tongs are assigned to the jaws of the stretching head 11 of the stretching device and arranged on the bridges 21 and 22.
  • Fig. 4 shows a modification using only a single bridge 35, as it can take the place of the two bridges 21 and 22, for example, and especially to support the one on a fixed or only slightly corresponding to that required to compensate for the detent spacing
  • Lifting part of the clamping head 11 changeable clamping line located pliers of the pairs of pliers are provided.
  • the jaws 36 of the pliers I and the jaws 37 of the pliers II are offset from one another below the bridge 35 in order to keep the end pieces of the profiles which are impaired by the alternate clamping as short as possible.
  • FIGS. 5A to E The workflow is shown in FIGS. 5A to E, the starting point in FIG. 5A being the point in time at which a first profile group is clamped in the pair of tongs with the tongs I above the cooling zone 8 and a second profile group in the pair of tongs the pliers II clamped over the cooling zone 9.
  • the profile group located above the cooling zone 9 is transversely conveyed with the clamp II into the axis 10 of the stretch straightening device while maintaining the clamping in the pair of pliers and clamped there by the jaws of the clamping head 11 and the counter head 12 in order to be straightened there .
  • the pliers II and the opposing pliers of the pair of pliers are released and the pliers II are moved in the transverse conveying direction (see FIG. 5B) until the pliers II are lifted vertically behind the profile group, back over the profile group, lowered in front of the profile group and can be moved to the position immediately with the tongs I, where they then take over the clamping of the profile group located above the cooling zone 8 (see FIG. 5C). Then the pliers I can be loosened.
  • the tongs I and II are moved transversely together until the tongs II with the first profile group are stopped above the cooling zone 9, while the open tongs I continue to move laterally, raised behind the first profile group, moved back over them, lowered again (see Fig. 5D) and then to take over a following profile group into the area of the discharge conveyor 2 as soon as the profile group is pulled out of the pull-out device 3 (see FIG. 5E). Then this profile group is clamped by the tongs I over the cooling zone 8, which ends a work cycle.
  • FIGS. 6A to E A further modification and a workflow which can be carried out with these modified exemplary embodiment are shown in FIGS. 6A to E.
  • the modification consists in that the tongs IIb of the pair of tongs transferring a profile group to the tongs of the stretch leveler 10 are opened in the transverse conveying direction instead of against the transverse conveying direction (as in the exemplary embodiment according to FIGS. 2 and 3), the advantage of this arrangement being that the tongs IIb can be extended against the transverse conveying direction with respect to the profile group clamped in the straightening machine 10 and the transverse conveyor 13b can be kept shorter by the amount required for the extension of the tongs II in the exemplary embodiment according to FIGS. 2 and 3.
  • Bridges 23b, 24b are also shortened by the same amount.
  • the workflow is as follows. In the initial position shown in FIG. 6A, there is one profile group each above the cooling zone 8 and the cooling zone 9. After a sufficient dwell time in the working cycle of the extrusion press, the one profile group of the pair of tongs IIb is moved from the cooling zone 9 into the clamping jaws of the stretch leveler 10 their clamping head 11 and counter clamping head 12 inserted and clamped by them, while at the same time the pair of tongs I with the profile group clamped by them moves from the cooling zone 8 to the cooling zone 9, as shown in FIG. 6B. After opening the tongs IIb, they are extended against the transverse conveying direction, raised vertically, moved over the profile group clamped by the tongs I, lowered in front of it (FIG.
  • FIGS. 7 and 8 show a modification with regard to the number of cooling zones to three 38, 39 and 40 instead of two in the exemplary embodiment according to FIGS. 2 and 3.
  • four pliers I, II, III and IV and pairs of pliers are required.
  • the pliers I and III lie in alignment with the pliers of the counter head 12 or in the part of the clamping head 11, not shown, while the pliers II and IV are offset with their jaws in the longitudinal direction by a little more than the jaw depth.
  • the workflow is basically the same as that described for FIGS. 5A to E. Starting from the situation shown in FIGS.
  • the tongs IV are released, moved over the profile group into the same position as the tongs III, where they are closed.
  • the pliers III are released and moved over the profile group into the same position as the pliers II and closed there.
  • the pliers II are now released and moved over the profile group into the same position as the pliers I and closed there.
  • the tongs I are loosened and moved over the profile group to pick up a new profile group when it has run onto the discharge conveyor.
  • the tongs I, II, III and IV with the profile groups clamped by them moved to the following position, which can start another cycle.
  • the bridges 41 and 42 are each formed by two webs 41a, 41b and 42a, 42b, the webs 41a, 41b being formed by bridge wagons 41c and the webs 42a, 42b by bridge wagons 42c are summarized.
  • a trolley 43 can be moved between the webs 41a and 41b of the bridge 41 and a trolley 44 can be moved in the transverse direction between the webs 42a and 42b of the bridge 42, specifically in synchronism with the movement of the cross conveyors 6 and 7, of which the profile groups in addition to the clamping are supported in the pliers.
  • the trolleys 43 and 44 are provided with rails 45 arranged in the longitudinal direction, in which guides 46 are displaceable, which are otherwise designed like the guides 20 in the exemplary embodiment according to FIGS. 2 and 3, for which purpose reference is made to the corresponding description.
  • the guides 46 are displaced in the rails 45 by linear lifting gear 47, by which the profile groups are held under the required tensile force.
  • the bridge carriages 41c, 42c can be moved via cable pulls and can be locked in relation to the longitudinal members 27 by means of clamping devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Specific Conveyance Elements (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Heat Treatment Of Articles (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung zum schrittweisen Quertransport von Profilen, insbesondere Gruppen von Profilen von einem Längsförderer im Auslauf einer Metallstrangpresse zu einer ersten (8) und gegebenenfalls einer weiteren (9) Kühlstation bis in eine Streckrichtmaschine, wobei jede Profilgruppe während dieses Quertransports an den Profilenden zwischen Zangen (I,II) eingespannt ist, ferner die eine Profilgruppe über einen Schritt begleitenden Zangen (I,II) mit den den nächsten Schritt begleitenden Zangen und letztlich die in Außenposition angeordneten Zangen (12) der Streckrichtmaschine im Wechsel in Längsrichtung der Profile im Abstand einer Spannbackentiefe versetzt angeordnet, und die Zangen (I,II) für einen Schritt geschlossen bleiben, bis die Zangen für einen folgenden Schritt bzw. die Zangen (12) der Streckrichtmaschine geschlossen sind, und wobei die in Querförderrichtung seitlich offenen Zangen von senkrechten, in Führungen (20) senkrecht verstellbaren Säulen (18) getragen und die Führungen (20) ihrerseits horizontal von Querschienen (23, 24) geführt in Querförderrichtung verfahrbar angeordnet sind und die in Profillängsrichtung zum Ausgleich der Profillängen verstellbaren Querschienen (24) von durch horizontale Längsschienen geführte verfahrbare Wagen getragen sind. Die die Zangen führenden Querschienen sind erfindungsgemäß als den Quertransport seiner Länge nach überspannende Brücken (23, 24) mit Laufkatzen (20) als Zangenführungen ausgebildet, die an ihren Enden von parallel zum Pressenauslauf angeordneten, aufgeständerten Längsträgern abgestützt sind, von denen zumindest die die in Profillängsrichtung verstellbaren Brücken (24) mit Brückenwagen auf den Längsträgern verfahrbar sind. <IMAGE>The invention relates to a device for the gradual transverse transport of profiles, in particular groups of profiles from a longitudinal conveyor in the outlet of a metal extrusion press to a first (8) and optionally a further (9) cooling station up to a straightening machine, each profile group during this transverse transport at the profile ends is clamped between pliers (I, II), further the pliers (I, II) accompanying a profile group over one step with the pliers accompanying the next step and ultimately the pliers (12) of the stretch leveler arranged in the external position alternately in the longitudinal direction of the profiles in Distance of a jaw depth is offset, and the tongs (I, II) remain closed for one step until the tongs for a subsequent step or the tongs (12) of the stretch leveler are closed, and the tongs open laterally in the transverse conveying direction from vertical, in guides (20) vertically adjustable seeds ulen (18) carried and the guides (20) in turn horizontally guided by transverse rails (23, 24) are arranged to be movable in the transverse conveying direction and the transverse rails (24) adjustable in the longitudinal direction of the profile to compensate for the profile lengths are carried by movable carriages guided by horizontal longitudinal rails. The cross rails guiding the tongs are designed according to the invention as bridges (23, 24) spanning the lengthwise transverse transport with trolleys (20) as tongs guides which are supported at their ends by raised longitudinal members arranged parallel to the press outlet, at least those of which in Profile longitudinally adjustable bridges (24) with bridge carriages are movable on the longitudinal beams. <IMAGE>

Description

Die in einer Strangpresse erzeugten Metallprofile werden von einem Auslauf aufgenommen. Als Ausläufe kommen Auslauftische in Verbindung mit Abziehvorrichtungen (wie beispielsweise aus der EP 0 300 262 B1 bekannt) oder Auslaufförderer (wie beispielsweise aus der DE 39 36 177 C2 bekannt) in Betracht. Die Profile werden einzeln oder in Gruppen im Arbeitstakt der Strangpresse über ein Kühlbett quergefördert bis in eine Streckrichtmaschine, und nachdem sie gerichtet wurden bis auf einen Längsförderer, der die Profile einer Säge oder einer Schere zur Aufteilung in Handelslängen und schließlich einer Stapelvorrichtung zuführt. Im Auslauf hinter der Strangpresse liegt die Temperatur von Profilen aus Aluminium beispielsweise im Bereich von 450° bis 500°C. Um die Profile mit Erfolg durch Streckung richten zu können muß deren Temperatur auf unter 80°C gesenkt werden, wozu das als Querförderer ausgebildete Kühlbett vorgesehen ist. Die Verweilzeit der Profile auf dem Kühlbett und damit der Querförderweg wird durch unterhalb des Querförderers angeordnete Gebläse, die einen von unten gegen die zu kühlenden Profile gerichteten Luftstrom erzeugen, verringert (Zeitschrift "Aluminium" 47. Jahrgang (1971) Heft 9, S.545 bis 549, insbesondere S. 547 DE-OS 2 015 664).The metal profiles produced in an extrusion press are taken up by an outlet. Outlet tables in connection with pulling devices (as known for example from EP 0 300 262 B1) or outlet conveyors (as known for example from DE 39 36 177 C2) can be considered as outlets. The profiles are conveyed individually or in groups in the work cycle of the extruder via a cooling bed to a stretch leveler, and after they have been straightened up to a longitudinal conveyor, which feeds the profiles to a saw or scissors for division into commercial lengths and finally to a stacking device. In the outlet behind the extrusion press, the temperature of aluminum profiles is, for example, in the range from 450 ° to 500 ° C. In order to be able to straighten the profiles successfully by stretching, their temperature must be reduced to below 80 ° C., for which purpose the cooling bed designed as a cross conveyor is provided. The dwell time of the profiles on the cooling bed and thus the cross conveyor path is reduced by fans arranged below the cross conveyor, which generate an air flow directed from below against the profiles to be cooled (magazine "Aluminum", 47th year (1971), issue 9, p.545 to 549, in particular p. 547 DE-OS 2 015 664).

Während symmetrische Profile verzugsfrei abkühlen, neigen unsymmetrische Profile zum Verziehen, dem dadurch entgegengewirkt wird, daß die Enden von gewalzten Profilen in Zangen eingespannt und die Profile während des Quertransports zwischen den Zangen unter Zugspannung gehalten werden, wie dies durch die US-PS 1 441 354 und die DE-AS 1 216 657 bekannt ist, wobei die Zugspannung sich zwischen den Zangen selbsttätig als Schrumpfspannung aufbaut oder über eine auf eine der Zangen einwirkende Kolben-Zylinder-Einheit aufgebracht wird.While symmetrical profiles cool without warping, asymmetrical profiles tend to warp, which is counteracted by clamping the ends of rolled profiles in tongs and keeping the profiles under tension during transverse transport between the tongs, as described by US Pat. No. 1,441,354 and DE-AS 1 216 657 is known, wherein the tensile stress builds up automatically between the pliers as shrinkage stress or is applied via a piston-cylinder unit acting on one of the pliers.

Stranggepreßte Profile, an die besonders hohe Anforderungen an die Geradheit gestellt werden, werden nach der Abkühlung unter 80°C in einer Streckrichtmaschine, kurz als Strecker bezeichnet, durch Streckung gerichtet. Die Einführung unsymmetrischer zum Verziehen neigender Profile in die Spannbacken der Streckrichtmaschine bereitet Schwierigkeiten und steht einer Automatisierung des Arbeitsablaufs entgegen. Deshalb werden unsymmetrische, zum Verziehen neigende Profile bzw. Gruppen von Profilen auf dem Auslauftisch oder Auslaufförderer an den Enden von Zangen eines Zangenpaares erfaßt, die bei der Querförderung mitlaufen und die Profile unter einer deren Verziehen ganz oder weitgehend ausschließenden Längsspannung halten und das Profil bzw. die geschlossene Gruppe von Profilen in die Zangen der Streckrichtmaschine einbringen und erst gelöst werden, nachdem die Zangen der Streckrichtmaschine die Einspannung des Profils bzw. der Profile übernommen haben. Zur Erreichung eines ausreichenden Durchsatzes werden dabei zwei oder mehr Zangenpaare vorgesehen, die in Profillängsrichtung im Abstand mindestens einer Spannbackentiefe zueinander versetzt sein müssen um in ihren sich überschneidenden Arbeitsbereichen bewegt werden zu können, wobei die Zangen wechselnd versetzt sind, um die durch die Einspannung beeinträchtigten Endstücke der Profile kurz zu halten. Damit die Zangen von einer Endposition, in der sie ein Profil bzw. eine Gruppe von Profilen an ein weiteres Zangenpaar oder an die Zangen der Streckrichtmaschine übergeben, in ihre Ausgangsstellung zurückgeführt werden können, sind die Zangen von senkrechten Säulen getragen, die in Führungen senkrecht verstellbar sind, wobei die Führungen an horizontalen Schienen in Querförderrichtung verfahrbar sind. Die Profile liegen mit einem Ende stets in der durch die Säge bzw. Schere im Pressenauslauf und dem stationären Teil der Streckrichtmaschine gegebenen Linie, so daß die horizontalen Schienen zur Führung der die Profile an diesen Enden fassenden Zangen ortsfest angeordnet sein können. Die die Profile an den anderen Enden fassenden Zangen müssen wie der zweite Teil der Streckrichtmaschine auf die im jeweiligen Preßprogramm eingestellte Profillänge einstellbar und zusätzlich zum Ausgleich der mit der Abkühlung der Profile einhergehenden Schrumpfung eingerichtet sein, wozu jeder Zange und der sie führenden Querschiene ein in Profillängsrichtung verfahrbar aufgehängter in horizontalen Längsschienen geführter Wagen zugeordnet ist. Zur Aufhängung der Wagen bedarf es einer den Auslauf der Strangpresse und den Querförderer bis in den Bereich der Streckrichtmaschine in einer der Fahrbahnenlänge der Wagen entsprechenden Breite überkragenden die Längsschienen tragenden Plattform, die nicht nur wegen ihres baulichen Aufwands sondern insbesondere auch von erheblichem Nachteil ist, weil die Zugänglichkeit des Querförderers von oben durch die überkragende Plattform stark eingeschränkt ist.Extruded profiles, to which particularly high demands are placed on straightness, are straightened by stretching after cooling below 80 ° C. in a stretch leveling machine, referred to for short as a stretcher. The introduction of asymmetrical profiles with a tendency to warp in the clamping jaws of the stretch leveler creates difficulties and prevents the workflow from being automated. For this reason, asymmetrical profiles or groups of profiles that tend to warp are detected on the outlet table or outlet conveyor at the ends of tongs of a pair of tongs, which run along the transverse conveyor and hold the profiles under a longitudinal tension that is completely or largely excluded from warping and the profile or insert the closed group of profiles into the pliers of the stretch leveler and only be released after the pliers of the stretch leveler have taken over the clamping of the profile or profiles. To achieve a sufficient throughput, two or more pairs of pliers are provided, which must be offset in the longitudinal direction of the profile at a distance of at least one clamping jaw depth in order to be able to be moved in their overlapping working areas, the pliers being alternately offset in order to avoid the end pieces affected by the clamping keep the profiles short. So that the tongs can be returned to their starting position from an end position, in which they transfer a profile or a group of profiles to another pair of tongs or to the tongs of the stretch leveler, the tongs are supported by vertical columns that can be adjusted vertically in guides are, the guides on horizontal rails can be moved in the transverse conveying direction. The profiles always lie with one end in the line given by the saw or scissors in the press outlet and the stationary part of the stretch leveler, so that the horizontal rails for guiding the tongs holding the profiles at these ends can be arranged in a stationary manner. The pliers holding the profiles at the other ends must, like the second part of the stretch leveler, be adjusted to the profile length set in the respective pressing program and also to compensate the shrinkage associated with the cooling of the profiles can be set up, for which purpose each tongs and the transverse rail guiding them are assigned a carriage guided in horizontal longitudinal rails and movable in the longitudinal direction of the profile. The suspension of the wagons requires a platform that supports the longitudinal rails and extends beyond the run-out of the extrusion press and the cross conveyor into the area of the stretch leveler in a width corresponding to the length of the carriageway of the wagons.This platform is not only of considerable construction expense but also of considerable disadvantage because the accessibility of the cross conveyor from above is severely restricted by the overhanging platform.

Aufgabe der Erfindung ist es, eine Vorrichtung zum schrittweisen Quertransport von Profilen, die mit Zangen von Zangenpaaren versehen ist, welche die Profile bzw. Gruppen von Profilen während des Quertransports vom Auslauf hinter der Strangpresse bis in die Streckrichtmaschine wechselweise fassen, begleiten und durch Zugspannung gestreckt halten, zu verbessern hinsichtlich des baulichen Aufwands und der Zugänglichkeit des Querförderers. Zur Lösung dieser Aufgabe sind bei einer Vorrichtung gemäß dem Oberbegriff des Anspruchs 1 die die Zangen führenden Querschienen als den Quertransport seiner Länge nach überspannende Brücken mit Laufkatzen als Zangenführungen ausgebildet, die an ihren Enden von parallel zum Pressenauslauf angeordneten, aufgeständerten Längsträgern abgestützt sind, von denen zumindest die die in Profillängsrichtung zum Ausgleich der Profillängen verstellbaren Brücken mit Brückenwagen auf den Längsträgern verfahrbar sind.The object of the invention is to provide a device for the gradual transverse transport of profiles, which is provided with pliers of pairs of pliers, which alternately grasp the profiles or groups of profiles during the transverse transport from the outlet behind the extrusion press to the stretch leveler, and are stretched by tensile stress keep improving with regard to the structural complexity and the accessibility of the cross conveyor. To achieve this object in a device according to the preamble of claim 1, the cross rails guiding the tongs are designed as bridges spanning the transverse transport along their length, with trolleys as tongs guides, which are supported at their ends by raised longitudinal members arranged parallel to the press outlet, of which at least the bridges that can be adjusted in the longitudinal direction of the profile to compensate for the profile lengths can be moved with bridge carriages on the longitudinal members.

Soweit eine Verstellbarkeit in Profillängsrichtung für eine Brücke zur Einstellbarkeit auf eine Einspannlinie und jedenfalls zur Verstellbarkeit entsprechend der jeweiligen Profillängen vorgesehen ist, ist eine Gleichlaufsteuerung der Brückenwagen der Brücke und des weiteren vorzusehen, daß die Brückenwagen in Arbeitsposition gegenüber den Längsträgern feststellbar sind. Diese Weiterbildung der Erfindung geht damit einher, daß die eines der Zangenpaare zur Einspannung eines Profils bzw. einer Profilgruppe tragende Brücke im Gleichlauf in ihren Brückenwagen oder die Führung eines der Zangenpaare in Längsschienen einer der Brücke zugeordneten Laufkatze in Längsrichtung um mindestens das aus Reckung und Schrumpfung des eingespannten Profils bzw. der Profile resultierende Maß verstellbar sind.Insofar as adjustability in the longitudinal direction of the profile for a bridge is provided for adjustability to a clamping line and in any case for adjustability according to the respective profile lengths, a synchronous control of the bridge carriages of the bridge and, further, that the bridge carriages can be locked in the working position with respect to the longitudinal beams is to be provided. This development of the invention is associated with the fact that the bridge carrying one of the pairs of pliers for clamping a profile or a profile group in synchronism in its bridge carriage or the guidance of one of the pairs of pliers in longitudinal rails the trolley assigned to the bridge can be adjusted in the longitudinal direction by at least the amount resulting from stretching and shrinking of the clamped profile or profiles.

Eine einfache Energiezuführung wird dadurch sichergestellt, daß für den Zangenschluß, für den senkrechten Hub der Zangensäulen in ihren Führungen und gegebenenfalls für die Längsbewegung der Brücken in ihren Brückenwagen bzw. der Zangenführungen in ihren Laufkatzen von Drehfeldmotoren angetriebene elektromechanische Linearhubgetriebe vorgesehen sind.A simple supply of energy is ensured by the fact that electromechanical linear linear drives are provided for the closing of the pliers, for the vertical lifting of the pliers columns in their guides and possibly for the longitudinal movement of the bridges in their bridge carriages or the pliers guides in their trolleys.

Das eingespannte Profil bzw. die eingespannte Profilgruppe liegt bei dem Quertransport auch auf den Querförderbändern auf, weshalb gemäß einem weiteren vorteilhaften Merkmal einer Weiterbildung der Erfindung die Laufkatzen für die Zangen von dynamischen Servomotoren synchron mit den Querförderbändern angetrieben sind.The clamped profile or the clamped profile group rests on the transverse conveyor belts during the transverse transport, which is why, according to a further advantageous feature of a development of the invention, the trolleys for the pliers are driven synchronously with the transverse conveyor belts by dynamic servomotors.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt.Embodiments of the invention are shown in the drawings.

Es zeigt die

Figur 1
den Aufriß einer Strangpreßlinie mit der erfindungsgemäßen Querförderrichtung. Die Querförderrichtung ist in Ausschnitten in größerem Maßstab in
Figur 2
in einer Seitenansicht in der Ebene II-II nach Fig. 1 dargestellt, während in gleichem Maßstab die
Figur 3
den Ausschnitt des Aufrisses im Bereich II nach Figur 1 zeigt. Figur 4 zeigt eine Abwandlung zu der in Fig. 3 dargestellten Einzelheit.
Figur 5A bis Figur 5E
zeigen in einer der Fig. 2 entsprechenden Seitenansicht in verkleinerter Darstellung den Arbeitsablauf.
Figur 6A bis Figur 6E
zeigen einen Arbeitsablauf für ein abgewandeltes Ausführungsbeispiel
Figur 7
zeigt in Seitenansicht und
Figur 8
im Aufriß (entsprechend den Fig. 2 und 3) eine Abwandlung mit drei anstatt zwei Kühlzonen.
Figur 9
zeigt eine Einzelheit. Eine weitere Abwandlung ist in
Figur 10
in einem Längsschnitt, in
Figur 11
in einem Querschnitt und in
Figur 12
in einem Aufriß dargestellt.
It shows the
Figure 1
the elevation of an extrusion line with the transverse conveying direction according to the invention. The cross-conveying direction is in sections on a larger scale
Figure 2
shown in a side view in the plane II-II of FIG. 1, while on the same scale
Figure 3
shows the section of the elevation in area II of Figure 1. FIG. 4 shows a modification of the detail shown in FIG. 3.
Figure 5A to Figure 5E
show in a side view corresponding to FIG. 2 the workflow in a reduced view.
Figure 6A to Figure 6E
show a workflow for a modified embodiment
Figure 7
shows in side view and
Figure 8
in elevation (corresponding to FIGS. 2 and 3) a modification with three instead of two cooling zones.
Figure 9
shows a detail. Another variation is in
Figure 10
in a longitudinal section, in
Figure 11
in a cross section and in
Figure 12
represented in an elevation.

In dem Aufriß der Strangpreßlinie nach Fig. 1 ist mit 1 die Strangpresse bezeichnet. In Verlängerung der Achse der Strangpresse 1 erstreckt sich in Längsrichtung X ein Auslaufförderer 2, dem eine einfach- oder doppeltwirkende Ausziehvorrichtung 3 zugeordnet ist, deren gegebenenfalls zwei Greifer wechselweise ein aus der Strangpresse auslaufendes Profil oder eine Profilgruppe greifen und abziehen. (Wenn in der folgenden Beschreibung die Bezeichnung "Profilgruppe" benutzt wird, steht diese auch für ein einzelnes Profil). Eine Schere 4 und eine Säge 5 sind vorgesehen, um die ausgepreßte Profilgruppe in der vorgesehenen Länge von maximal Lmax und minimal Lmin abzulängen. Die abgelängten Profilgruppen werden von sich in ihrem Wirkungsbereich überschneidenden getrennt steuerbaren Querförderern 6 und 7 vom Auslaufförderer 2 schrittweise auf eine erste Kühlzone 8 und im Takt auf eine zweite Kühlzone abgelegt und dann in die Achse 10 einer Streckvorrichtung eingebracht, die aus einem stationären, den Streckhub ausführenden Spannkopf 11 und einem auf die vorgesehene Länge der Profilgruppen einstellbaren Gegenkopf 12 besteht.In the elevation of the extrusion line according to Fig. 1, 1 is the extrusion press. In the extension of the axis of the extrusion press 1, a discharge conveyor 2 extends in the longitudinal direction X, to which a single- or double-acting pull-out device 3 is assigned, the two grippers of which, if necessary, alternately grip and pull off a profile or a profile group that runs out of the extruder. (If the term "profile group" is used in the following description, this also stands for a single profile). A pair of scissors 4 and a saw 5 are provided in order to cut the extruded profile group to the desired length of maximum L max and minimum L min . The cut-to-length profile groups are gradually deposited in their area of effect by separately controllable cross conveyors 6 and 7 from the outfeed conveyor 2 onto a first cooling zone 8 and in time with a second cooling zone and then introduced into the axis 10 of a stretching device which results from a stationary stretching stroke Executing clamping head 11 and a counter head 12 adjustable to the intended length of the profile groups.

Nach dem Streckrichten werden die Profilgruppen von einem Querförderer 13 aus der Streckvorrichtung abgefördert bis auf einen Längsförderer 14, der sie übernimmt und der Adjustage 15 zufördert.After the straightening, the profile groups are conveyed out of the stretching device by a cross conveyor 13 except for a longitudinal conveyor 14, which takes them over and conveys them to the finishing line 15.

Sofern Profile gepreßt werden, die dazu neigen sich beim Abkühlen zu verziehen, werden die Profilgruppen an ihren Enden von Zangen eingespannt und während der Abkühlung unter einer das Verziehen ganz oder weitgehend ausschließenden Längsspannung gehalten. Die Zangen bestehen (siehe Fig. 2) aus einer unteren Backe 16 und einer oberen Backe 17, wobei die untere Backe 16 rechtwinklig mit einer Säule 18 verbunden ist, während die obere Backe 17 mit einer Hülse 19 verbunden und mit dieser entlang der Säule 18 zum Schließen und Öffnen der Zange verschiebbar ist. Die Säule 18 ist ihrerseits vertikal verschiebbar in einer Führung 20, die als Laufkatze ausgebildet und entlang einer der Brücken 21, 22, 23 und 24 in Querrichtung verfahrbar ist. Der Hub der Säule 18 in der Führung 20 ist nach unten begrenzt durch einen Bund 18a. An der Führung 20 ist über eine Konsole 20a ein Linearhubgetriebe 25 abgestützt, welches zum Öffnen und Schließen der Zange auf die obere Backe 17 einwirkt. Wenn beim Aufwärtsgang des Linearhubgetriebes 25 die Zange ihre größte Öffnungsweite erreicht, schlägt die Hülse 19 der oberen Backe 17 gegen einen Anschlag 18b an der Säule 18, so daß diese und damit auch die untere Backe 16 so weit angehoben wird, daß diese sich um die vorgesehene maximale Profilhöhe höher über der Oberkante der Querförderer 6 und 7 befindet und über die Profile hinweg querbewegt werden kann.If profiles are pressed that tend to warp on cooling, the profile groups are clamped at their ends by pliers and are kept under a longitudinal tension that completely or largely excludes the warping during cooling. The pliers consist (see FIG. 2) of a lower jaw 16 and an upper jaw 17, the lower jaw 16 being connected at right angles to a column 18, while the upper jaw 17 is connected to a sleeve 19 and with it along the column 18 can be moved to close and open the pliers. The column 18 is in turn vertically displaceable in a guide 20 which is designed as a trolley and can be moved in the transverse direction along one of the bridges 21, 22, 23 and 24. The stroke of the column 18 in the guide 20 is limited at the bottom by a collar 18a. A linear lifting gear 25 is supported on the guide 20 via a bracket 20a, which acts on the upper jaw 17 to open and close the pliers. When the pliers reaches their greatest opening width during the upward movement of the linear lifting gear 25, the sleeve 19 of the upper jaw 17 strikes against a stop 18b on the column 18, so that this and thus also the lower jaw 16 is raised so far that it is about the intended maximum profile height is higher above the upper edge of the cross conveyor 6 and 7 and can be moved across the profiles.

Der vorgesehenen Profillänge entsprechend ist der Abstand der Brücken 23/24 von den Brücken 21/22 einzustellen. Die Brücken 21, 22, 23 und 24 überspannen den gesamten Quertransport vom Auslaufförderer 3 bis zum Längsförderer 14 mit dem ersten Querförderer 6, dem zweiten Querförderer 7 und dem dritten Querförderer 13 und sind von aufgeständerten Längsträgern 26 für die Brücken 21 und 22 und Längsträgern 27 für die Brücken 23 und 24 abgestützt und längs diesen mit Brückenwagen 28 verfahrbar. Die Längsträger 27 sind in ihrer Länge entsprechend der Differenz zwischen der größten und kleinsten vorgesehenen Profillänge bemessen. Die Längsträger 26 sind nur für einen kurzen Verfahrweg der Brücken 21 und 22 vorzusehen, wenn der Gegenkopf 12 der Streckrichtmaschine nicht stufenlos verstellbar ist, sondern im Abstand von Rasten, der dann im Hub des Spannkopfes 11 der Streckrichtmaschine ausgeglichen wird, ansonsten die Brücken 21 und 22 fest mit den Längsträgern 26 verbunden sein können.The distance of the bridges 23/24 from the bridges 21/22 must be set according to the intended profile length. The bridges 21, 22, 23 and 24 span the entire cross transport from the outfeed conveyor 3 to the longitudinal conveyor 14 with the first cross conveyor 6, the second cross conveyor 7 and the third cross conveyor 13 and are of raised longitudinal beams 26 for the bridges 21 and 22 and longitudinal beams 27 supported for the bridges 23 and 24 and longitudinally movable with the bridge carriage 28. The longitudinal beams 27 are provided in length in accordance with the difference between the largest and smallest Dimension profile length. The longitudinal members 26 are only to be provided for a short travel of the bridges 21 and 22 if the counter head 12 of the stretch leveler is not continuously adjustable, but at a distance from detents, which is then compensated for in the stroke of the clamping head 11 of the stretch leveler, otherwise the bridges 21 and 22 can be firmly connected to the side members 26.

Durch die Einspannung der Profilgruppe in den Zangenpaaren baut sich durch die mit der Abkühlung einhergehende Schrumpfung selbsttätig eine Zugspannung in den Profilgruppen auf. Um jedoch von Beginn an eine Zugspannung bestimmter, gleichbleibender Größe verfügbar zu haben ist mindestens eine Zange eines jeden Zangenpaares in Längsrichtung der eingespannten Profilgruppe mit einer der gewünschten Zugspannung entsprechenden Kraft verfahrbar, beispielsweise durch Verfahren der die Zange tragenden Brücke. In Fig. 9 ist ein hierzu geeigneter Brückenwagen dargestellt. Der Brückenwagen 28 ist mittels einer Klemmvorrichtung 29 gegenüber dem Längsträger 27 verriegelbar und mit einem Schlitz 30 versehen, in dem ein mit der Brücke 23 verbundenes Gleitstück 31 in Längsrichtung beweglich ist. Ein Linearhubgetriebe 32 verschiebt die Brücke 23 mit deren Gleitstück 31 in dem Schlitz 30, wobei diese Verschiebung in den beiden einer Brücke zugehörigen Brückenwagen im Gleichlauf erfolgt und die auf die Profilgruppe ausgeübte Zugspannung von den Linearhubgetrieben in entsprechenden Anteilen aufgebracht wird. Die Bewegungsfreiheit der Gleitstücke 31 in den Schlitzen 30 ist für das aus Schrumpfung und Reckung der Profile resultierende Maß ausreichend bemessen. Für darüber hinausgehende Verschiebungen der Brücke werden die Brückenwagen über Seilzüge 33 nach Lösen der Klemmvorrichtung 29 im Gleichlauf der beiden einer Brücke zugeordneten, mit Laufrädern 34 versehenen Brückenwagen verfahren.By clamping the profile group in the pairs of pliers, the shrinkage associated with the cooling automatically creates a tensile stress in the profile groups. However, in order to have a tension of a certain, constant size available from the start, at least one pair of pliers of each pair of pliers can be moved in the longitudinal direction of the clamped profile group with a force corresponding to the desired tension, for example by moving the bridge carrying the pliers. A suitable bridge carriage is shown in FIG. 9. The bridge carriage 28 can be locked with respect to the longitudinal beam 27 by means of a clamping device 29 and is provided with a slot 30 in which a slide piece 31 connected to the bridge 23 can be moved in the longitudinal direction. A linear lifting gear 32 displaces the bridge 23 with its slide 31 in the slot 30, this displacement taking place in synchronism in the two bridge carriages belonging to a bridge and the tensile stress exerted on the profile group being applied by the linear lifting gear in appropriate proportions. The freedom of movement of the sliders 31 in the slots 30 is sufficiently dimensioned for the dimension resulting from the shrinking and stretching of the profiles. For further displacements of the bridge, the bridge carriages are moved via cable pulls 33 after loosening the clamping device 29 in synchronism with the two bridge carriages assigned to a bridge and provided with wheels 34.

Wie die Fig. 3 zeigt, sind die Zangen I und II an sich gegenüberstehenden Seiten der Brücken 23 und 24 angeordnet, so daß die Backen 16 und 17 der Zange I in Querrichtung mit den Backen des Gegenkopfes 12 der Streckvorrichtung und die Backen 16 und 17 der Zange II mit geringem Abstand außerhalb dieser Flucht liegen, um die durch die Einspannung der Profile beeinträchtigten Endstücke möglichst kurz zu halten. In entsprechender Weise sind auch die Gegenzangen zu den Zangen I und II der Zangenpaare den Backen des Streckkopfes 11 der Streckvorrichtung zugeordnet und an den Brücken 21 und 22 angeordnet.3, the pliers I and II are arranged on opposite sides of the bridges 23 and 24, so that the jaws 16 and 17 of the pliers I in the transverse direction with the jaws of the counter head 12 of the stretching device and the jaws 16 and 17 the pliers II with a small distance outside this escape to keep the end pieces affected by the clamping of the profiles as short as possible. Correspondingly, the opposing tongs to the tongs I and II of the pair of tongs are assigned to the jaws of the stretching head 11 of the stretching device and arranged on the bridges 21 and 22.

Die Fig. 4 zeigt eine Abwandlung unter Verwendung nur einer einzigen Brücke 35, wie sie beispielsweise an die Stelle der zwei Brücken 21 und 22 treten kann und besonders zur Abstützung der auf einer festen bzw. einer nur geringfügig entsprechend dem für den Ausgleich des Rastenabstandes erforderlichen Hubteil des Spannkopfes 11 veränderbaren Einspannlinie gelegenen Zangen der Zangenpaare vorgesehen sind. Die Backen 36 der Zangen I und die Backen 37 der Zangen II sind unterhalb der Brücke 35 aufeinander zu versetzt, um die durch die wechselweise Einspannung beeinträchtigten Endstücke der Profile möglichst kurz zu halten.Fig. 4 shows a modification using only a single bridge 35, as it can take the place of the two bridges 21 and 22, for example, and especially to support the one on a fixed or only slightly corresponding to that required to compensate for the detent spacing Lifting part of the clamping head 11 changeable clamping line located pliers of the pairs of pliers are provided. The jaws 36 of the pliers I and the jaws 37 of the pliers II are offset from one another below the bridge 35 in order to keep the end pieces of the profiles which are impaired by the alternate clamping as short as possible.

Der Arbeitsablauf ist in den Fig. 5A bis E dargestellt, wobei als Ausgangsposition in Fig. 5A der Zeitpunkt gewählt ist, in dem sich eine erste Profilgruppe in dem Zangenpaar mit der Zange I eingespannt über der Kühlzone 8 und eine zweite Profilgruppe in dem Zangenpaar mit der Zange II eingespannt über der der Kühlzone 9 befindet. Nach ausreichender Abkühlung wird die sich über der Kühlzone 9 befindliche Profllgruppe unter Aufrechterhaltung der Einspannung in den Zangenpaaren mit der Zange II bis in die Achse 10 der Streckrichtvorrichtung quergefördert und dort von den Backen des Spannkopfes 11 und des Gegenkopfes 12 eingespannt, um dort streckgerichtet zu werden. Sobald die Profilgruppe von den Backen des Spannkopfes 11 und des Gegenkopfes 12 eingespannt sind werden die Zange II und die Gegenzange des Zangenpaares gelöst und die Zangen II werden in Querförderrichtung verfahren (siehe Fig. 5B), bis die Zangen II hinter der Profilgruppe senkrecht angehoben, über die Profilgruppe zurück, vor der Profilgruppe wieder abgesenkt und bis in die Position gleich mit den Zangen I verfahren werden können, wo sie dann die Einspannung der über der Kühlzone 8 befindlichen Profilgruppe übernehmen (siehe Fig. 5C). Sodann können die Zangen I gelöst werden. DIe Zangen I und II werden gemeinsam quer verfahren, bis die Zangen II mit der ersten Profilgruppe über der Kühlzone 9 angehalten werden, während die geöffneten Zangen I weiter querbewegt, hinter der ersten Profilgruppe angehoben, über sie hinweg zurückbewegt, wieder abgesenkt (siehe Fig. 5D) und dann zur Übernahme einer folgenden Profilgruppe in den Bereich des Auslaufförderers 2 bewegt werden, sobald die Profilgruppe von der Ausziehvorrichtung 3 ausgezogen ist (siehe Fig. 5E). Sodann wird diese Profilgruppe von den Zangen I eingespannt über die Kühlzone 8 verbracht, womit ein Arbeitszyklus beendet ist.The workflow is shown in FIGS. 5A to E, the starting point in FIG. 5A being the point in time at which a first profile group is clamped in the pair of tongs with the tongs I above the cooling zone 8 and a second profile group in the pair of tongs the pliers II clamped over the cooling zone 9. After sufficient cooling, the profile group located above the cooling zone 9 is transversely conveyed with the clamp II into the axis 10 of the stretch straightening device while maintaining the clamping in the pair of pliers and clamped there by the jaws of the clamping head 11 and the counter head 12 in order to be straightened there . As soon as the profile group is clamped by the jaws of the clamping head 11 and the counter head 12, the pliers II and the opposing pliers of the pair of pliers are released and the pliers II are moved in the transverse conveying direction (see FIG. 5B) until the pliers II are lifted vertically behind the profile group, back over the profile group, lowered in front of the profile group and can be moved to the position immediately with the tongs I, where they then take over the clamping of the profile group located above the cooling zone 8 (see FIG. 5C). Then the pliers I can be loosened. The tongs I and II are moved transversely together until the tongs II with the first profile group are stopped above the cooling zone 9, while the open tongs I continue to move laterally, raised behind the first profile group, moved back over them, lowered again (see Fig. 5D) and then to take over a following profile group into the area of the discharge conveyor 2 as soon as the profile group is pulled out of the pull-out device 3 (see FIG. 5E). Then this profile group is clamped by the tongs I over the cooling zone 8, which ends a work cycle.

Eine weitere Abwandlung und ein mit diesen abgewandelten Ausführungsbeispiel durchführbarer Arbeitsablauf ist in den Fig. 6A bis E dargestellt. Die Abwandlung besteht darin, daß die Zangen IIb des eine Profilgruppe an die Zangen der Streckrichtmaschine 10 übergebenden Zangenpaares anstatt gegen die Querförderrichtung (wie im Ausführungsbeispiel nach den Fig. 2 und 3) in Querförderrichtung geöffnet sind, wobei der Vorteil dieser Anordnung darin besteht, daß die Zangen IIb gegen die Querförderrichtung gegenüber der in der Streckrichtmaschine 10 eingespannten Profilgruppe ausfahrbar sind und der Querförderer 13b um das für das Ausfahren der Zangen II im Ausführungsbeispiel nach den Fig. 2 und 3 benötigte Maß kürzer gehalten werden kann. Um das gleiche Maß verkürzen sich auch die Brücken 23b, 24b. Der Arbeitsablauf ist folgender. In der in Fig. 6A dargestellten Ausgangsstellung befindet sich je eine Profilgruppe über der Kühlzone 8 und der Kühlzone 9. Nach ausreichender Verweilzeit im Arbeitstakt der Strangpresse wird die eine Profilgruppe von dem Paar von Zangen IIb von der Kühlzone 9 in die Spannbacken der Streckrichtmaschine 10 mit ihrem Spannkopf 11 und Gegenspannkopf 12 eingeführt und von diesen eingespannt, während sich gleichzeitig das Paar von Zangen I mit der von diesem eingespannten Profilgruppe von der Kühlzone 8 zur Kühlzone 9 bewegt, wie dies in Fig. 6B dargestellt ist. Nach dem Öffnen der Zangen IIb werden diese entgegen der Querförderrichtung ausgefahren, senkrecht angehoben, über die von den Zangen I eingespannte Profilgruppe hinweggefahren, vor dieser abgesenkt (Fig. 6C) und so weit in Querförderrichtung vorbewegt, daß sie die über der Kühlzone 9 sich befindende Profilgruppe und deren Einspannung übernehmen können. Dann werden die Zangen I geöffnet und in Querförderrichtung ausgefahren, senkrecht angehoben, gegen die Querförderrichtung bis vor die über der Kühlzone 9 sich befindende Profilgruppe verfahren und dort abgesenkt. Sobald die Ausziehvorrichtung 3 eine neue Profilgruppe auf dem Auslaufförderer 2 bereitgestellt hat (Fig. 6D), werden die Zangen I gegen die Querförderrichtung zur Übernahme der Profilgruppe auf dem Auslaufförderer 2 verfahren, wie in Fig. 6E dargestellt. Sodann wird diese Profilgruppe von den Zangen I über die Kühlzone 8 verbracht, womit ein Arbeitszyklus beendet ist.A further modification and a workflow which can be carried out with these modified exemplary embodiment are shown in FIGS. 6A to E. The modification consists in that the tongs IIb of the pair of tongs transferring a profile group to the tongs of the stretch leveler 10 are opened in the transverse conveying direction instead of against the transverse conveying direction (as in the exemplary embodiment according to FIGS. 2 and 3), the advantage of this arrangement being that the tongs IIb can be extended against the transverse conveying direction with respect to the profile group clamped in the straightening machine 10 and the transverse conveyor 13b can be kept shorter by the amount required for the extension of the tongs II in the exemplary embodiment according to FIGS. 2 and 3. Bridges 23b, 24b are also shortened by the same amount. The workflow is as follows. In the initial position shown in FIG. 6A, there is one profile group each above the cooling zone 8 and the cooling zone 9. After a sufficient dwell time in the working cycle of the extrusion press, the one profile group of the pair of tongs IIb is moved from the cooling zone 9 into the clamping jaws of the stretch leveler 10 their clamping head 11 and counter clamping head 12 inserted and clamped by them, while at the same time the pair of tongs I with the profile group clamped by them moves from the cooling zone 8 to the cooling zone 9, as shown in FIG. 6B. After opening the tongs IIb, they are extended against the transverse conveying direction, raised vertically, moved over the profile group clamped by the tongs I, lowered in front of it (FIG. 6C) and so far in the transverse conveying direction moved that they can take over the profile group located above the cooling zone 9 and its clamping. Then the tongs I are opened and extended in the transverse conveying direction, raised vertically, moved against the transverse conveying direction up to the profile group located above the cooling zone 9 and lowered there. As soon as the pull-out device 3 has provided a new profile group on the discharge conveyor 2 (FIG. 6D), the tongs I are moved against the transverse conveying direction to take over the profile group on the discharge conveyor 2, as shown in FIG. 6E. This profile group is then moved by the tongs I via the cooling zone 8, which ends a working cycle.

Die Fig. 7 und 8 zeigen eine Abwandlung hinsichtlich der Zahl der Kühlzonen auf drei 38, 39 und 40 anstatt zwei im Ausführungsbeispiel nach den Fig. 2 und 3. Um die Profilgruppen unter ständiger Einspannung vom Auslaufförderer 2 bis in die Achse 10 der Streckvorrichtung zu überführen sind vier Zangen I, II, III und IV und Zangenpaare erforderlich. Die Zangen I und III liegen in einer Flucht mit den Zangen des Gegenkopfes 12 bzw. in dem nicht dargestellten Teil des Spannkopfes 11, während in Längsrichtung um etwas mehr als die Backentiefe versetzt die Zangen II und IV mit ihren Backen fluchtend angeordnet sind. Der Arbeitsablauf gleicht im Prinzip dem zu den Fig. 5A bis E beschriebenen. Ausgehend von der in den Fig. 7 und 8 dargestellten Situation, in der eine Profilgruppe in die Streckvorrichtung verbracht ist, werden die Zangen IV gelöst, über die Profilgruppe hinweg in die Gleichlage mit den Zangen III bewegt, wo sie geschlossen werden. Nun werden die Zangen III gelöst und über die Profilgruppe hinweg in die Gleichlage mit den Zangen II bewegt und dort geschlossen. In der Folge werden nun die Zangen II gelöst und über die Profilgruppe hinweg in die Gleichlage mit den Zangen I bewegt und dort geschlossen. Schließlich werden die Zangen I gelöst und über die Profilgruppe hinweg bewegt zur Aufnahme einer neuen Profilgruppe, wenn diese auf dem Auslaufförderer aufgelaufen ist. Sobald die in der Streckvorrichtung gerichtete Profilgruppe vom Querförderer 13 aus der Streckvorrichtung abgefördert ist, werden die Zangen I, II, III und IV mit den von ihnen eingespannten Profilgruppen in die folgende Position querverschoben, womit ein weiterer Arbeitszyklus beginnen kann.7 and 8 show a modification with regard to the number of cooling zones to three 38, 39 and 40 instead of two in the exemplary embodiment according to FIGS. 2 and 3. In order to keep the profile groups under constant clamping from the discharge conveyor 2 to the axis 10 of the stretching device four pliers I, II, III and IV and pairs of pliers are required. The pliers I and III lie in alignment with the pliers of the counter head 12 or in the part of the clamping head 11, not shown, while the pliers II and IV are offset with their jaws in the longitudinal direction by a little more than the jaw depth. The workflow is basically the same as that described for FIGS. 5A to E. Starting from the situation shown in FIGS. 7 and 8, in which a profile group has been placed in the stretching device, the tongs IV are released, moved over the profile group into the same position as the tongs III, where they are closed. Now the pliers III are released and moved over the profile group into the same position as the pliers II and closed there. As a result, the pliers II are now released and moved over the profile group into the same position as the pliers I and closed there. Finally, the tongs I are loosened and moved over the profile group to pick up a new profile group when it has run onto the discharge conveyor. As soon as the profile group directed in the stretching device has been conveyed out of the stretching device by the cross conveyor 13, the tongs I, II, III and IV with the profile groups clamped by them moved to the following position, which can start another cycle.

Bei dem in den Fig. 10, 11 und 12 dargestellten Ausführungsbeispiel sind die Brücken 41 und 42 von je zwei Stegen 41a, 41b sowie 42a, 42b gebildet, wobei die Stege 41a, 41b von Brückenwagen 41c und die Stege 42a, 42b von Brückenwagen 42c zusammengefaßt sind. Zwischen den Stegen 41a und 41b der Brücke 41 ist eine Laufkatze 43 und zwischen den Stegen 42a und 42b der Brücke 42 ist eine Laufkatze 44 in der Querrichtung verfahrbar und zwar synchron mit der Bewegung der Querförderer 6 und 7 von denen die Profilgruppen zusätzlich zu der Einspannung in den Zangen abgestützt sind. Die Laufkatzen 43 und 44 sind mit in Längsrichtung angeordneten Schienen 45 versehen, in denen Führungen 46 verschiebbar sind, welche ansonsten wie die Führungen 20 bei dem Ausführungsbeispiel nach den Fig. 2 und 3 ausgebildet sind, wozu auf die entsprechende Beschreibung Bezug genommen wird. Verschoben werden die Führungen 46 in den Schienen 45 von Linearhubgetrieben 47 von denen die die Profilgruppen unter der erforderlichen Zugkraft gehalten werden. Die Brückenwagen 41c, 42c sind über Seilzüge verfahrbar und mittels Klemmvorrichtungen gegenüber den Längsträgern 27 verriegelbar.In the exemplary embodiment illustrated in FIGS. 10, 11 and 12, the bridges 41 and 42 are each formed by two webs 41a, 41b and 42a, 42b, the webs 41a, 41b being formed by bridge wagons 41c and the webs 42a, 42b by bridge wagons 42c are summarized. A trolley 43 can be moved between the webs 41a and 41b of the bridge 41 and a trolley 44 can be moved in the transverse direction between the webs 42a and 42b of the bridge 42, specifically in synchronism with the movement of the cross conveyors 6 and 7, of which the profile groups in addition to the clamping are supported in the pliers. The trolleys 43 and 44 are provided with rails 45 arranged in the longitudinal direction, in which guides 46 are displaceable, which are otherwise designed like the guides 20 in the exemplary embodiment according to FIGS. 2 and 3, for which purpose reference is made to the corresponding description. The guides 46 are displaced in the rails 45 by linear lifting gear 47, by which the profile groups are held under the required tensile force. The bridge carriages 41c, 42c can be moved via cable pulls and can be locked in relation to the longitudinal members 27 by means of clamping devices.

Einen besonderen Vorteil bietet das Ausführungsbeispiel nach den Fig. 10, 11 und 12 durch eine Bemessung der Schienen 45 und des Verfahrweges der Führungen 46 in den Schienen 45, die den Zangen I und II aus einer in Querrichtung fluchtenden Stellung auf der Linie S, die der Zangenstellung bei Übergabe der Profilgruppe an die Zangen der Streckvorrichtung entspricht, Längsbewegungen in entgegengesetzten Richtungen in einem Ausmaß erlaubt, welches dem Stichmaß R zwischen den sich kreuzenden Zangen I und II zusätzlich dem aus der Schrumpfung und Streckung der Profile resultierenden Maß entspricht. Hierdurch ist es möglich die Profilgruppen in ständiger Einspannung vom Auslaufförderer 2 bis in die Streckvorrichtung zu fördern, wobei sich die Zangen I und II auf der für die Übergabe der Profilgruppen an die Streckvorrichtung geeigneten Linie S hin bewegen und im Kreuzungsbereich die rückfahrende Zange durch die Bewegung um das Stichmaß R der hinfahrenden Zange ausweichen kann, um dann auf die Linie S der hinfahrenden Zangen zurückzukehren. So durchläuft die Zange I mit eingespannter Profilgruppe ausgehend von der Position A die Positionen B und C über den Kühlzonen 8 und 9 und gelangt in die Position D in der die Profilgruppe an die Zangen der Streckvorrichtung übergeben wird. Die Zange I wird dann gelöst, in die Position E gefahren, angehoben und über die Profilgruppe hinweg in die Position F gefahren. Dort erfolgt die Längsverschiebung um das Stichmaß R bis in die Position G von wo aus sie an der Zange II vorbei in die Ausgangsposition zurückfährt. Die Zange II durchläuft ausgehend von der Position A ebenso die Position B, C und D, wo die von ihr gehaltene Profilgruppe an die Zangen der Streckvorrichtung übergeben wird. Nach dem Lösen der Zange II fährt diese ebenfalls in die Position E, wird angehoben und fährt über die Profilgruppe hinweg in die Position F. Dort erfolgt die Längsverschiebung um das Stichmaß R in die Position H von wo aus sie an der Zange I vorbei in die Ausgangsposition zurückfährt.10, 11 and 12 offers a particular advantage by dimensioning the rails 45 and the travel of the guides 46 in the rails 45, which the pliers I and II from a transversely aligned position on the line S, the corresponds to the position of the pliers when the profile group is transferred to the pliers of the stretching device, allows longitudinal movements in opposite directions to an extent which corresponds to the pitch R between the intersecting pliers I and II and the dimension resulting from the shrinking and stretching of the profiles. This makes it possible to convey the profile groups in constant clamping from the discharge conveyor 2 to the stretching device, the tongs I and II moving on the line S suitable for transferring the profile groups to the stretching device and the retracting tongs in the crossing area the movement can deviate by the pitch R of the moving pliers and then returns to the line S of the moving pliers. Thus, the tongs I with clamped profile group, starting from position A, pass through positions B and C over the cooling zones 8 and 9 and reach position D in which the profile group is transferred to the tongs of the stretching device. The pliers I are then released, moved into position E, raised and moved over the profile group into position F. There the longitudinal displacement takes place by the pitch R to position G from where it moves past the pliers II back into the starting position. Starting from position A, pliers II also pass through positions B, C and D, where the profile group held by them is transferred to the pliers of the stretching device. After loosening the pliers II, this also moves to position E, is raised and moves over the profile group into position F. There, the longitudinal displacement by the pitch R takes place in position H, from where it passes the pliers I into Starting position moves back.

Claims (7)

  1. A device for the stepwise transverse transportation of sections, in particular groups of sections, from a longitudinal conveyor at the end of a metal extrusion press (1) to a first (8; 38) and optionally a second (9; 39) and further (40) cooling station as far as a stretcher-leveller (10), wherein
    a) each section or each group of sections is gripped between clamps (I, II, III, IV) at the ends of the sections during the said transverse transportation,
    b) the clamps (I, II, III, IV) accompanying a section or group of sections over one step with the clamps accompanying the next step and finally the clamps of the stretcher-leveller (10) arranged at the outside position [are] arranged alternately offset in the longitudinal direction of the sections at the distance of the depth of a clamping jaw,
    c) the clamps (I, II, III, IV) for one step remain closed until the clamps for a following step or the clamps of the stretcher-leveller (10) are closed,
    d) the clamps which are open laterally in the transverse conveying direction (Y) are supported by vertical columns (18) vertically displaceable in guides (20) and the guides (20) in turn are guided horizontally by transverse rails (21, 22, 23, 24, 35, 41, 42) and are arranged so as to be movable in the transverse conveying direction (Y), and so after the clamps (I, II, III, IV) have been raised into the end position of their step they are lifted by horizontal transverse movement and vertical movement above the section or group of sections and can be retracted into the starting position for receiving a following section or group of sections, and
    e) the transverse rails (23, 24) displaceable in the longitudinal direction (X) of the sections for compensating the lengths of the sections are supported by movable carriages guided by horizontal longitudinal rails,
    characterized in that the transverse rails guiding the clamps are constructed as bridges (21, 22, 23, 24; 35; 41, 42) with trolleys (20; 43, 44) as clamp guides, the bridges spanning the transverse transportation along its length and being supported at their ends by longitudinal supports (26, 27) which are mounted on stands and arranged parallel to the end (2) of the press and of which at least the bridges (23, 24; 41, 42) displaceable in the longitudinal direction (X) of the sections are movable with bridge carriages (28; 41c, 42c) on the longitudinal supports (27).
  2. A transverse-transportation device according to Claim 1, characterized in that the two carriages (28) of a bridge (23, 24) movable in synchronism can be fixed with respect to the longitudinal supports (27), and each bridge (23, 24) is displaceable in its carriage (28) in synchronism in the longitudinal direction by at least the amount resulting from elongation and shrinkage of the clamped section or sections.
  3. A transverse-transportation device according to Claim 1, characterized in that the two carriages (41c, 42c) of a bridge (41, 42) movable in synchronism can be fixed with respect to the longitudinal supports (27), and each bridge (41c, 42c) [sic] is provided with a trolley (43, 44) or a plurality thereof, wherein each trolley (43, 44) carries longitudinal rails (45) in which a clamp (I, II, III, IV) is displaceable with a clamp guide in the longitudinal direction (X) by at least the amount resulting from elongation and shrinkage of the clamped section or sections.
  4. A transverse-transportation device according to one of the preceding Claims, characterized in that the clamps (IIb) of the pair of clamps transferring a section or group of sections in the last step to the clamps of a stretcher-leveller (10) are opposed, i.e. are opened laterally in the transverse conveying direction.
  5. A transverse-transportation device according to one of the preceding Claims, characterized in that electro-mechanical linear lifting gears (21, 32, 47) driven by rotating-field motors are provided for the clamp closure, for the vertical lifting of the clamp columns (18) in their guides (20) and optionally for the longitudinal movement of the bridges (23, 24) in their carriages (28) and of the clamp guides (46) in their trolleys (43, 44).
  6. A transverse-transportation device according to one of the preceding Claims, characterized in that the trolleys (20, 43, 44) for the clamps can be driven by dynamic servo motors synchronously with the speed of the transverse conveyor belts (6, 7) for transporting a section or group of sections.
  7. A transverse-transportation device according to one of Claims 1, 3, 5 or 6, characterized by two bridges (41, 42), trolleys (43, 44) movable transversely on the bridges, clamp guides (46) mounted on the trolleys (43, 44) in the space between the bridges (41, 42) and movable transversely with the trolleys (43, 44) and longitudinally with respect to the trolleys (43, 44), wherein the distance of the bridges (41, 42) and the longitudinal path of travel of the clamp guide (46) from the trolley (43, 44) is dimensioned such that each clamp guide (46) can be moved from an advanced position in the middle (S) by the internal dimension (R) between intersecting clamps (I, II) and clamp guides (46) onto the associated bridge (41 and 42 respectively), so that the group of sections received from the end conveyor (2) by a clamp (I and II respectively) can be moved in the clamping head (11) and the counter head (12) while maintaining the clamping in the said clamp (I and II respectively) until it is transferred by the clamps of the stretching device.
EP95115199A 1995-08-12 1995-09-27 Transverse step-by-step transport apparatus of profiles between an extrusion press and a stretcher leveller Expired - Lifetime EP0759331B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP95115199A EP0759331B1 (en) 1995-08-12 1995-09-27 Transverse step-by-step transport apparatus of profiles between an extrusion press and a stretcher leveller
PCT/DE1996/001452 WO1997006902A1 (en) 1995-08-12 1996-08-03 Apparatus for stepwise transverse conveyance of profiles between the outlet of a metal extrusion press and a stretcher leveller
AU70827/96A AU713747B2 (en) 1995-08-12 1996-08-03 Device for the stepwise transverse transporation of sections between the delivery end of a metal extrusion press and stretcher-leveller
JP9508814A JP3071470B2 (en) 1995-08-12 1996-08-03 Apparatus for transferring a molded product in a horizontal direction in a step-by-step manner between a run-out part of a metal extrusion press and a stretch straightening machine
KR1019980701034A KR100287982B1 (en) 1995-08-12 1996-08-03 Stepwise transverse conveying profile between the exit of the metal extrusion press and the stretcher leveler
US09/011,293 US5907968A (en) 1995-08-12 1996-08-03 Apparatus for stepwise transverse conveyance of profiles between the outlet of a metal extrusion press and a stretcher leveller
NO980598A NO309932B1 (en) 1995-08-12 1998-02-12 Device for stepwise transverse transport of profiles

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP95112737 1995-08-12
EP95112737 1995-08-12
EP95115199A EP0759331B1 (en) 1995-08-12 1995-09-27 Transverse step-by-step transport apparatus of profiles between an extrusion press and a stretcher leveller

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EP0759331A1 EP0759331A1 (en) 1997-02-26
EP0759331B1 true EP0759331B1 (en) 1997-04-09

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US (1) US5907968A (en)
EP (1) EP0759331B1 (en)
JP (1) JP3071470B2 (en)
KR (1) KR100287982B1 (en)
AU (1) AU713747B2 (en)
NO (1) NO309932B1 (en)
WO (1) WO1997006902A1 (en)

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JPH05179492A (en) * 1991-12-30 1993-07-20 Yoshida Kogyo Kk <Ykk> Method for working end part of material to be treated for vertical hanging type surface treatment
EP0672473A1 (en) * 1994-03-15 1995-09-20 Norsk Hydro A/S Apparatus and process for the extrusion of profiles

Also Published As

Publication number Publication date
NO980598L (en) 1998-02-12
JPH10510477A (en) 1998-10-13
EP0759331A1 (en) 1997-02-26
NO980598D0 (en) 1998-02-12
NO309932B1 (en) 2001-04-23
JP3071470B2 (en) 2000-07-31
KR100287982B1 (en) 2001-05-02
US5907968A (en) 1999-06-01
KR19990036366A (en) 1999-05-25
AU7082796A (en) 1997-03-12
WO1997006902A1 (en) 1997-02-27
AU713747B2 (en) 1999-12-09

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