EP0318905B1 - Method and apparatus for making downpipes - Google Patents
Method and apparatus for making downpipes Download PDFInfo
- Publication number
- EP0318905B1 EP0318905B1 EP88119856A EP88119856A EP0318905B1 EP 0318905 B1 EP0318905 B1 EP 0318905B1 EP 88119856 A EP88119856 A EP 88119856A EP 88119856 A EP88119856 A EP 88119856A EP 0318905 B1 EP0318905 B1 EP 0318905B1
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- European Patent Office
- Prior art keywords
- mandrel
- pipe profile
- section
- bending
- pipe
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/10—Making tubes with seams being neither welded nor soldered, e.g. riveted seams
- B21C37/101—Making of the seams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/10—Making tubes with seams being neither welded nor soldered, e.g. riveted seams
Definitions
- the invention relates to a method and a device for the production of folded pluggable downpipes, in particular according to DIN 18 461, by bending formed from non-ferrous metals, preferably zinc and copper material, existing in a preforming arrangement sheet metal strips of certain cut width and cut length to pre-rounded pipe profiles, the Edged longitudinal edges, brought together to form a fold connection and bent flat on the outer circumference of the tubular profile.
- non-ferrous metals preferably zinc and copper material
- foldable plug-in downpipes are standardized, which are made from sheet metal strips of non-ferrous metal with a cutting width of 200 to 500 mm by bending, the longitudinal edges of which are connected to each other via a fold connection lying flat on the outer circumference of the downpipes.
- the diameter at the narrower pipe end is designed to be insertable into the further pipe end of the subsequent downpipe in such a way that the inside diameter at the narrower pipe end is approximately twice the wall thickness smaller than at the further pipe end.
- downpipes of this type can be produced from sheet metal strips of the desired cut length cut from an endless sheet metal strip to the desired length in such a way that the sheet metal strip is inserted into a bending section and into a reciprocating pulling carriage which passes the sheet metal strip through Bending stretch pulls through, is clamped. With each backward movement of the slide, the sheet metal strip is held in place and released in the outward direction during the forward movement.
- the initially flat, but then more and more curved bending shape of the bending section narrows to a cylindrical fold shape.
- the two longitudinal edges of the bending shape are turned inwards by approximately 180 °.
- the sheet metal strip is supported in these envelopes in the course of the deformation until the envelopes are finally omitted and the longitudinal edges of the sheet metal strip reach a folding device in which one longitudinal edge is bent to the standing seam and the other to the Z fold.
- a subsequent closing device the two folds are brought together, the standing seam is covered by the Z fold and both folds are bent by 90 ° C., as a result of which the fold connection comes to lie flat on the outer circumference of the downpipe.
- the downpipe After leaving the closing device, the downpipe is guided over a mandrel corresponding to its width, through which the deformation stresses of the sheet metal strip are compensated and the surface lines of the downpipes are smoothed.
- This device is perfected in that, according to DE-A-2 629 559, the endless sheet metal strip is inserted directly into the bending section and an endless tube is made from it, from which the downpipes of the desired length can then be cut to length using a so-called flying saw.
- the object of the present invention is therefore to produce downpipes of the shape described at the outset in such a way that their outer surface has a high quality and is free from scratches and scratches.
- the fold connection of the pipe profiles which have been rounded by roll profiling, is formed in several sections by bending with rotating tool movement, each pipe profile is transported in the outlet direction by the length of the section of the fold connection formed in each case, and the pipe section in the manufacture of the last section of the fold connection this section is manufactured expanded.
- the method according to the invention permits the mechanical production of rebated connections which, based on the outer circumference of the downpipe, can lie completely inside, completely outside or partly outside and partly inside.
- the downpipes have a high surface quality, as they are practically free of scratches and / or scratches, which ensures a uniform wall thickness.
- the device for carrying out the method according to the invention consists of a roll profiling device formed from a plurality of drivable bending roller pairs, the axes of which lie in the bending plane, for bending the sheet metal strips into pre-rounded tubular profiles, a stationary, essentially cylindrical mandrel with a conically or cylindrically widened section on the inlet side and with in Direction of outlet lying axis for receiving the pre-rounded tubular profile, counter-holder attached to the side of the mandrel, which can be moved transversely to the axis of the mandrel, for pressing the tubular profile onto the mandrel and a reversible one of several that can be driven Bending roll pairs, the axes of which are perpendicular or inclined to the bending plane, formed folding tool for edging and compressing the folds and folding the fold connection.
- the mandrel is divided in the longitudinal direction in such a way that the two segments can be displaced relative to one another along the parting plane emerging at the end faces of the mandrel, which is inclined relative to the plane including the axis of the mandrel.
- the diameter of the mandrel is reduced perpendicular to the plane including the axis of the mandrel, so that the tubular profile can be pulled off the mandrel.
- the mandrel is divided in the longitudinal direction along a dividing plane emerging at the end faces of the mandrel and the two segments can be spread apart.
- the folded connection of the tubular profile is produced in a spread state; by reducing the spread, the diameter of the mandrel decreases perpendicularly on the plane comprising the axis of the mandrel and the tubular profile can be removed from the mandrel.
- the mandrel can also be made of a rubber-elastic material and its effective diameter can be adjusted by compressing the end faces. By reducing the pressure load, the effective diameter of the mandrel is reduced to the initial size, which is smaller than the diameter of the tubular profile, and the tubular profile can be removed from the mandrel.
- the length of the mandrel is at least 10%, preferably 10 to 50% of the length of the tubular profile.
- the folding tool is designed such that the tubular profile is also transported when it moves in the outlet direction.
- a rolling straightening section can be arranged downstream of the folding tool, in which the tubular profile is straightened.
- a sheet metal strip (5) corresponding to the desired length of the downpipe is cut to length from the sheet metal strip (2) that runs out of the reel (1) and passed through the two pairs of straightening rollers (6 ) into the six Rolling roll pairs (7), which are arranged one behind the other, are introduced into the roll profiling device, in which the sheet metal strip (5) is rounded to form a tubular profile (8).
- the tubular section (8) is then pushed with its first section onto the stationary cylindrical mandrel (9), which in the longitudinal direction emerges along a plane (10) which emerges at the end faces of the mandrel (9) and is inclined with respect to the plane including the axis of the mandrel.
- the length of the mandrel (9) is approximately 10% of the length of the tubular profile (8).
- the inlet-side section (9 ') of the mandrel has a conical outer shape.
- the tubular profile (8) is pressed firmly onto the mandrel (9), so that the longitudinal edges without problems for producing the folded connection in the bending section of the Folding tool (15) can run in.
- the tubular profile (8) is moved forward by the folding tool (15) moving in the outlet direction.
- the conically widened insertion end of the tubular profile (9) is formed.
- the two segments (11, 11 ') of the mandrel (9) are displaced relative to one another along the division plane (10), the diameter of the mandrel (9) is reduced and the tubular profile (8) can be pulled off the mandrel (9).
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- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Vehicle Body Suspensions (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
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Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Herstellung von gefalzten steckbaren Regenfallrohren, insbesondere nach DIN 18 461, durch Biegeumformen von aus NE-Metall, vorzugsweise Zink- und Kupferwerkstoff, bestehenden in einer Vorformungsanordnung fortbewegten Blechstreifen bestimmter Zuschittbreite und Zuschnittlänge zu vorgerundeten Rohrprofilen, deren Längsränder aufgekantet, unter Bildung einer Falzverbindung zusammengeführt und flach auf den Außenumfang des Rohrprofils umgebogen werden.The invention relates to a method and a device for the production of folded pluggable downpipes, in particular according to DIN 18 461, by bending formed from non-ferrous metals, preferably zinc and copper material, existing in a preforming arrangement sheet metal strips of certain cut width and cut length to pre-rounded pipe profiles, the Edged longitudinal edges, brought together to form a fold connection and bent flat on the outer circumference of the tubular profile.
Durch DIN 18 461 sind gefalzte steckbare Regenfallrohre genormt, die aus Blechstreifen von NE-Metall von 200 bis 500 mm Zuschnittbreite durch Biegeumformen hergestellt werden, wobei deren Längsränder über eine flach auf dem Außenumfang der Regenfallrohre liegende Falzverbindung miteinander verbunden sind. Der Durchmesser am engeren Rohrende ist passend in das weitere Rohrende des nachfolgenden Regenfallrohrs in der Weise einsteckbar gestaltet, daß der Innendurchmesser am engeren Rohrende um etwa den Betrag der doppelten Wanddicke kleiner als am weiteren Rohrende ist.According to DIN 18 461, foldable plug-in downpipes are standardized, which are made from sheet metal strips of non-ferrous metal with a cutting width of 200 to 500 mm by bending, the longitudinal edges of which are connected to each other via a fold connection lying flat on the outer circumference of the downpipes. The diameter at the narrower pipe end is designed to be insertable into the further pipe end of the subsequent downpipe in such a way that the inside diameter at the narrower pipe end is approximately twice the wall thickness smaller than at the further pipe end.
Nach der DE-C-1 170 891 lassen sich derartige Regenfallrohre aus von einem endlosen Blechband gewünschter Zuschnittbreite abgelängten Blechstreifen gewünschter Zuschnittlänge in der Weise herstellen, daß der Blechstreifen in eine Biegestrecke eingeführt und in einen hin- und herbewegbaren Ziehschlitten, der den Blechstreifen durch die Biegestrecke hindurchzieht, eingespannt wird. Bei jeder Rückwärtsbewegung des Ziehschlittens wird der Blechstreifen festgehalten und bei der Vorwärtsbewegung in Auslaufrichtung freigegeben.According to DE-C-1 170 891, downpipes of this type can be produced from sheet metal strips of the desired cut length cut from an endless sheet metal strip to the desired length in such a way that the sheet metal strip is inserted into a bending section and into a reciprocating pulling carriage which passes the sheet metal strip through Bending stretch pulls through, is clamped. With each backward movement of the slide, the sheet metal strip is held in place and released in the outward direction during the forward movement.
Die zunächst flache, dann aber mehr und mehr nach unten gewölbte Biegeform der Biegestrecke verengt sich zu einer zylindrischen Falzform. Die beiden Längsränder der Biegeform sind um etwa 180° nach innen umgeschlagen. In diesen Umschlägen stützt sich der Blechstreifen im Verlauf der Verformung ab, bis schließlich die Umschläge entfallen und die Längskanten des Blechstreifens in eine Falzeinrichtung gelangen, in der der eine Längsrand zum Stehfalz und der andere zum Z-Falz gebogen werden. In einer nachfolgenden Schließvorrichtung werden die beiden Falze zusammengeführt, der Stehfalz wird dabei von dem Z-Falz überdeckt und beide Falze um 90°C umgebogen, wodurch die Falzverbindung flach auf dem Außenumfang des Regenfallrohrs zu liegen kommt. Nach dem Verlassen der Schließvorrichtung wird das Regenfallrohr über einen seiner Weite entsprechenden Dorn geführt, durch den Verformungsspannungen des Blechstreifens ausgeglichen und die Mantellinien der Regenfallrohre geglättet werden. Diese Vorrichtung ist dadurch vervollkommnet, daß gemäß DE-A-2 629 559 das endlose Blechband unmittelbar in die Biegestrecke eingeführt und daraus ein endloses Rohr gefertigt wird, von dem dann Regenfallrohre gewünschter Länge mit Hilfe einer sogenannten fliegenden Säge abgelängt werden können.The initially flat, but then more and more curved bending shape of the bending section narrows to a cylindrical fold shape. The two longitudinal edges of the bending shape are turned inwards by approximately 180 °. The sheet metal strip is supported in these envelopes in the course of the deformation until the envelopes are finally omitted and the longitudinal edges of the sheet metal strip reach a folding device in which one longitudinal edge is bent to the standing seam and the other to the Z fold. In a subsequent closing device, the two folds are brought together, the standing seam is covered by the Z fold and both folds are bent by 90 ° C., as a result of which the fold connection comes to lie flat on the outer circumference of the downpipe. After leaving the closing device, the downpipe is guided over a mandrel corresponding to its width, through which the deformation stresses of the sheet metal strip are compensated and the surface lines of the downpipes are smoothed. This device is perfected in that, according to DE-A-2 629 559, the endless sheet metal strip is inserted directly into the bending section and an endless tube is made from it, from which the downpipes of the desired length can then be cut to length using a so-called flying saw.
Die vorstehend beschriebenen Einrichtungen zur Herstellung von gefalzten Regenfallrohren haben sich zwar seit vielen Jahren in der Praxis bewährt, ihnen haftet jedoch der Nachteil an, daß sich beim Ziehen der Blechsteifen bzw. des Blechbandes durch die Biegeform Riefen und/oder Kratzer auf der Außenoberfläche der Regenfallrohre bilden, die die ästhetische Wirkung der Regenfallrohre erheblich beeinträchtigen und zu einer ungleichmäßigen Wanddicke führen.The devices described above for the production of folded downpipes have proven themselves in practice for many years, but they have the disadvantage that when the sheet metal stiffeners or sheet metal strip are pulled, the bending shape causes grooves and / or scratches on the outer surface of the downpipes form, which significantly impair the aesthetic effect of the downpipes and lead to an uneven wall thickness.
Aufgabe der vorliegenden Erfindung ist es deshalb, Regenfallrohre der eingangs beschriebenen Form so herzustellen, daß ihre Außenoberfläche eine hohe Güte aufweist und frei von Riefen und Kratzern ist.The object of the present invention is therefore to produce downpipes of the shape described at the outset in such a way that their outer surface has a high quality and is free from scratches and scratches.
Diese Aufgabe wird dadurch gelöst, daß die Falzverbindung der durch Walzprofilieren vorgerundeten Rohrprofile in mehreren Abschnitten durch Biegeumformen mit drehender Werkzeugbewegung geformt, jedes Rohrprofil um die Länge des jeweils geformten Abschnitts der Falzverbindung in Auslaufrichtung transportiert und bei der Herstellung des letzten Abschnitts der Falzverbindung das Rohrprofil in diesem Abschnitt aufgeweitet gefertigt wird. Das erfindungsgemäße Verfahren erlaubt die maschinelle Herstellung von Falzverbindungen, die, bezogen auf den Außenumfang des Regenfallrohrs, vollständig innen, vollständig außen oder zu einem Teil außen und zu einem Teil innen liegen können. Die Regenfallrohre besitzen eine hohe Oberflächengüte, da sie praktisch frei von Riefen und/oder Kratzern sind und damit eine gleichmäßige Wanddicke gewährleistet ist.This object is achieved in that the fold connection of the pipe profiles, which have been rounded by roll profiling, is formed in several sections by bending with rotating tool movement, each pipe profile is transported in the outlet direction by the length of the section of the fold connection formed in each case, and the pipe section in the manufacture of the last section of the fold connection this section is manufactured expanded. The method according to the invention permits the mechanical production of rebated connections which, based on the outer circumference of the downpipe, can lie completely inside, completely outside or partly outside and partly inside. The downpipes have a high surface quality, as they are practically free of scratches and / or scratches, which ensures a uniform wall thickness.
Die Vorrichtung zur Durchführung des Verfahrens besteht erfindungsgemäß aus einer aus mehreren antreibbaren Biegewalzenpaaren, deren Achsen in der Biegeebene liegen, gebildeten Walzprofiliereinrichtung zum Biegeumformen der Blechstreifen zu vorgerundeten Rohrprofilen, einem ortsfest angeordneten, im wesentlichen zylindrischen Dorn mit einlaufseitig konisch oder zylindrisch aufgeweitetem Abschnitt und mit in Auslaufrichtung liegender Achse für die Aufnahme des vorgerundeten Rohrprofils, seitlich des Dorns angebrachte, quer zur Achse des Dorns verschiebliche Gegenhalter zum Andrücken des Rohrprofils auf den Dorn und einem reversierbaren, aus mehreren antreibbaren Biegewalzenpaaren, deren Achsen senkrecht oder geneigt zur Biegeebene stehen, gebildeten Falzwerkzeug zum Aufkanten und Zusammendrücken der Falze und Umlegen der Falzverbindung.The device for carrying out the method according to the invention consists of a roll profiling device formed from a plurality of drivable bending roller pairs, the axes of which lie in the bending plane, for bending the sheet metal strips into pre-rounded tubular profiles, a stationary, essentially cylindrical mandrel with a conically or cylindrically widened section on the inlet side and with in Direction of outlet lying axis for receiving the pre-rounded tubular profile, counter-holder attached to the side of the mandrel, which can be moved transversely to the axis of the mandrel, for pressing the tubular profile onto the mandrel and a reversible one of several that can be driven Bending roll pairs, the axes of which are perpendicular or inclined to the bending plane, formed folding tool for edging and compressing the folds and folding the fold connection.
Nach einem besonderen Merkmal der Vorrichtung ist der Dorn in Längsrichtung so geteilt, daß die zwei Segmente entlang der an den Stirnseiten des Dorns austretenden Teilungsebene, die gegenüber der die Achse des Dorns einschließenden Ebene geneigt ist, gegeneinander verschiebbar sind. Beim Verschieben der Segmente gegeneinander wird der Durchmesser des Dorns senkrecht zu der die Achse des Dorns einschließenden Ebene verkleinert, so daß das Rohrprofil von dem Dorn abgezogen werden kann.According to a special feature of the device, the mandrel is divided in the longitudinal direction in such a way that the two segments can be displaced relative to one another along the parting plane emerging at the end faces of the mandrel, which is inclined relative to the plane including the axis of the mandrel. When the segments are moved relative to one another, the diameter of the mandrel is reduced perpendicular to the plane including the axis of the mandrel, so that the tubular profile can be pulled off the mandrel.
Die gleiche Wirkung läßt sich auch dadurch erreichen, daß der Dorn in Längsrichtung entlang einer an den Stirnseiten des Dorns austretenden Teilungsebene geteilt ist und die zwei Segmente gegeneinander spreizbar sind. In gespreiztem Zustand wird die Falzverbindung des Rohrprofils hergestellt; durch Zurücknahme der Spreizung verkleinert sich der Durchmesser des Dorns senkrecht an der die Achse des Dorns umfassenden Ebene und das Rohrprofil kann von dem Dorn abgenommen werden.The same effect can also be achieved in that the mandrel is divided in the longitudinal direction along a dividing plane emerging at the end faces of the mandrel and the two segments can be spread apart. The folded connection of the tubular profile is produced in a spread state; by reducing the spread, the diameter of the mandrel decreases perpendicularly on the plane comprising the axis of the mandrel and the tubular profile can be removed from the mandrel.
Der Dorn kann auch aus einem gummielastischen Werkstoff bestehen und sein Wirkdurchmesser durch Druckbelastung der Stirnflächen einstellbar sein. Durch Abbau der Druckbelastung geht der Wirkdurchmesser des Dorns auf die Ausgangsgröße, die kleiner als der Durchmesser des Rohrprofils ist, zurück, und das Rohrprofil kann von dem Dorn entfernt werden.The mandrel can also be made of a rubber-elastic material and its effective diameter can be adjusted by compressing the end faces. By reducing the pressure load, the effective diameter of the mandrel is reduced to the initial size, which is smaller than the diameter of the tubular profile, and the tubular profile can be removed from the mandrel.
Nach einer vorzugsweisen Ausgestaltung der Vorrichtung beträgt die Länge des Dorns wenigstens 10 %, vorzugsweise 10 bis 50 % der Länge des Rohrprofils.According to a preferred embodiment of the device, the length of the mandrel is at least 10%, preferably 10 to 50% of the length of the tubular profile.
Nach einem weiteren Erfindungsmerkmal ist das Falzwerkzeug so ausgebildet, daß bei dessen Bewegung in Auslaufrichtung das Rohrprofil mittransportiert wird.According to a further feature of the invention, the folding tool is designed such that the tubular profile is also transported when it moves in the outlet direction.
Falls erforderlich, kann dem Falzwerkzeug noch eine Walzrichtstrecke nachgeordnet sein, in der das Rohrprofil gerichtet wird.If necessary, a rolling straightening section can be arranged downstream of the folding tool, in which the tubular profile is straightened.
Die Erfindung ist in den Zeichnungen beispielhaft dargestellt und wird nachfolgend näher erläutert. Es zeigen:
- Fig. 1
- eine schematische Darstellung einer Vorrichtung zur Herstellung gefalzter und steckbarer Regenfallrohre.
- Fig. 2
- einen Querschnitt durch die Vorrichtung im Bereich des Dorns.
- Fig. 3
- eine einen Teil des Dorns und das Falzwerkzeug umfassende Seitenansicht.
- Fig. 4
- eine einen Teil des Dorns und das Falzwerkzeug umfassende Draufsicht.
- Fig. 1
- is a schematic representation of a device for producing folded and pluggable downpipes.
- Fig. 2
- a cross section through the device in the region of the mandrel.
- Fig. 3
- a side view comprising part of the mandrel and the folding tool.
- Fig. 4
- a plan view comprising part of the mandrel and the folding tool.
Von dem von dem Haspel (1) ablaufenden Blechband (2) bestimmter Zuschnittbreite wird nach Durchlauf durch die Einzugsrollen (3) mit Hilfe der Trennvorrichtung (4) ein Blechsteifen (5) entsprechend der gewünschten Länge des Regenfallrohrs abgelängt und durch die beiden Richtwalzenpaare (6) hindurch in die aus sechs hintereinander angeordneten angetriebenen Biegewalzenpaaren (7) gebildete Walzprofiliereinrichtung eingeführt, in der der Blechsteifen (5) zu einem Rohrprofil (8) verrundet wird. Anschließend wird das Rohrprofil (8) mit seinem ersten Abschnitt auf den ortsfest angeordneten zylindrischen Dorn (9) aufgeschoben, der in Längsrichtung entlang einer an den Stirnseiten des Dorns (9) austretenden, gegenüber der die Achse des Dorns einschließenden Ebene geneigten Ebene (10) so geteilt ist, daß die zwei Segmente (11,11') gegeneinander verschiebbar sind. Die Länge des Dorns (9) beträgt etwa 10 % der Länge des Rohrprofils (8). Der einlaufseitige Abschnitt (9') des Dorns besitzt eine konische Außenform. Das über die Führungsrollen (12) in den Führungsschienen (13) des Tragrahmens (14) reversierbar geführte Falzwerkzeug (15) verfährt entgegen der Auslaufrichtung über den Dorn (9), so daß die angetriebenen Biegewalzenpaare (16) die Längsränder des Rohrprofils (8) zu Falzen (17) aufkanten, diese unter Bildung einer Falzverbindung zusammenführen und letztere um 90° auf den Außenumfang des Regenfallrohrs umbiegen. Durch die seitlich schräg nach oben vom Dorn (9) angeordneten quer zur Achse des Dorns verschiebbaren Gegenhalter (18) wird das Rohrprofil (8) fest auf den Dorn (9) gedrückt, so daß die Längsränder problemlos zur Herstellung der Falzverbindung in die Biegestrecke des Falzwerkzeugs (15) einlaufen können. Nach der Herstellung eines jeden Abschnitts der Falzverbindung wird das Rohrprofil (8) durch das sich in Auslaufrichtung bewegende Falzwerkzeug (15) vorwärts bewegt. Bei der Formgebung des letzten Abschnitts der Falzverbindung wird das konisch aufgeweitete Einsteckende des Rohrprofils (9) geformt. Dann werden die beiden Segmente (11,11') des Dorns (9) entlang der Teilungsebene (10) gegeneinander verschoben, der Durchmesser des Dorns (9) verkleinert sich und das Rohrprofil (8) kann von dem Dorn (9) abgezogen werden.After passing through the feed rollers (3) with the aid of the separating device (4), a sheet metal strip (5) corresponding to the desired length of the downpipe is cut to length from the sheet metal strip (2) that runs out of the reel (1) and passed through the two pairs of straightening rollers (6 ) into the six Rolling roll pairs (7), which are arranged one behind the other, are introduced into the roll profiling device, in which the sheet metal strip (5) is rounded to form a tubular profile (8). The tubular section (8) is then pushed with its first section onto the stationary cylindrical mandrel (9), which in the longitudinal direction emerges along a plane (10) which emerges at the end faces of the mandrel (9) and is inclined with respect to the plane including the axis of the mandrel. is divided so that the two segments (11, 11 ') are displaceable relative to one another. The length of the mandrel (9) is approximately 10% of the length of the tubular profile (8). The inlet-side section (9 ') of the mandrel has a conical outer shape. The folding tool (15), which is reversibly guided in the guide rails (13) of the supporting frame (14) via the guide rollers (12), moves against the outlet direction via the mandrel (9), so that the driven pairs of bending rollers (16) extend the longitudinal edges of the tubular profile (8). Edge up to folds (17), bring them together to form a fold connection and bend the latter by 90 ° onto the outer circumference of the downpipe. By the laterally obliquely upwards from the mandrel (9) arranged transversely to the axis of the mandrel movable counter-holder (18), the tubular profile (8) is pressed firmly onto the mandrel (9), so that the longitudinal edges without problems for producing the folded connection in the bending section of the Folding tool (15) can run in. After each section of the fold connection has been produced, the tubular profile (8) is moved forward by the folding tool (15) moving in the outlet direction. When the last section of the folded connection is shaped, the conically widened insertion end of the tubular profile (9) is formed. Then the two segments (11, 11 ') of the mandrel (9) are displaced relative to one another along the division plane (10), the diameter of the mandrel (9) is reduced and the tubular profile (8) can be pulled off the mandrel (9).
Claims (8)
- A process for the preparation of seamed plug-in rainwater downpipes, in particular in accordance with DIN 18 461, by bend forming metal strips of a certain blank width and blank length, made of non-ferrous metal, preferably zinc or copper material, which are moved in a deformation unit, to form pre-rounded pipe profiles, the longitudinal edges of which are set on edge, brought together to form a lock seam and said seam is bent round flat on to the outer periphery of the pipe profile, characterised in that on the pipe profiles which have been pre-rounded by roll-forming the lock seam is formed in several sections by bend forming with a rotating tool movement, the pipe profile is transported in the exit direction by the length of the section of the lock seam formed each time, and for the production of the final section of the lock seam the pipe profile is made enlarged in this section.
- An apparatus for performing the process according to Claim 1, consisting of a bending apparatus (7) for the bend forming of the metal strip to form a pre-rounded pipe profile (8), and a fixed, substantially cylindrical mandrel (9), lying with its axis in the exit direction, for receiving the pre-rounded pipe profile, characterised in that the bending apparatus consists of a plurality of drivable pairs of bending profile rollers (16), the axes of which lie in the bending plane, the mandrel (9) has a section (9') which is conically or cylindrically enlarged on the inlet side, holding-up means (18) movable transversely to the axis of the mandrel for pressing the pipe profile on to the mandrel are provided laterally to the mandrel and a reversible folding tool (15) is provided which is formed of a plurality of pairs (16) of bending profile rollers, the axes of which are perpendicular or inclined with respect to the bending plane, for setting on edge and bringing together the folds (17) and beading the lock seam on to the outer periphery of the pipe profile (8).
- An apparatus according to Claim 2, characterised in that the mandrel (9) is divided in the longitudinal direction and the joint plane (10) of the two segments (11, 11') which are displaceable relative to each other in the longitudinal direction, which plane emerges on the end faces of the mandrel, is inclined with respect to the plane enclosing the axis of the mandrel.
- An apparatus according to Claim 2, characterised in that the mandrel (9) is divided in the longitudinal direction along a joint plane (10) emerging on the end faces of the mandrel and the two segments (11, 11') can be spread relative to one another.
- An apparatus according to Claim 2, characterised by a mandrel (9) made of a rubber-elastic material, the effective diameter of which mandrel can be produced by pressure-loading the end faces.
- An apparatus according to Claim 3, 4 or 5, characterised in that the length of the mandrel (9) is at least 10%, preferably 10 to 50%, of the length of the pipe profile (8).
- An apparatus according to Claims 2 to 6, characterized in that the folding tool (15) is designed as a transport means for the pipe profile (8) in the exit direction.
- An apparatus according to Claims 2 to 7, characterised in that the folding tool (15) is succeeded by a roller-levelling section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873740750 DE3740750A1 (en) | 1987-12-02 | 1987-12-02 | METHOD AND DEVICE FOR PRODUCING RAINFALL PIPES |
| DE3740750 | 1987-12-02 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0318905A2 EP0318905A2 (en) | 1989-06-07 |
| EP0318905A3 EP0318905A3 (en) | 1990-09-19 |
| EP0318905B1 true EP0318905B1 (en) | 1994-06-15 |
Family
ID=6341676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88119856A Expired - Lifetime EP0318905B1 (en) | 1987-12-02 | 1988-11-29 | Method and apparatus for making downpipes |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0318905B1 (en) |
| AT (1) | ATE107203T1 (en) |
| DE (2) | DE3740750A1 (en) |
| DK (1) | DK169907B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991016156A1 (en) * | 1990-04-12 | 1991-10-31 | Die-Craft Engineering Pty. Ltd | Tapered conduit |
| RU2181313C2 (en) * | 2000-06-13 | 2002-04-20 | Открытое акционерное общество "Череповецкий сталепрокатный завод" | Shape bending mill for making tubes with folded seam |
| RU2270731C1 (en) * | 2004-08-09 | 2006-02-27 | Общество с ограниченной ответственностью "Русские карнизы" | Mandrel for squeezing tubes with inner folded seam |
| RU2276627C1 (en) * | 2004-09-28 | 2006-05-20 | Общество с ограниченной ответственностью "Русские карнизы" | Shape bending mill |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1408232A (en) * | 1917-05-12 | 1922-02-28 | Frank H Stolp | Method of forming sheet metal |
| US2644416A (en) * | 1949-02-02 | 1953-07-07 | Oldberg Mfg Company | Apparatus for forming tubes |
| GB867915A (en) * | 1956-06-02 | 1961-05-10 | Metal Developments Ltd | Improvements relating to columns |
| DE3022671A1 (en) * | 1980-06-18 | 1982-01-14 | Krückels, Gerhard, Dipl.-Ing., 7860 Schopfheim | PROFILING MACHINE AND METHOD FOR PRODUCING A PROFILE |
-
1987
- 1987-12-02 DE DE19873740750 patent/DE3740750A1/en not_active Withdrawn
-
1988
- 1988-11-29 EP EP88119856A patent/EP0318905B1/en not_active Expired - Lifetime
- 1988-11-29 AT AT88119856T patent/ATE107203T1/en not_active IP Right Cessation
- 1988-11-29 DE DE3850225T patent/DE3850225D1/en not_active Expired - Lifetime
- 1988-12-01 DK DK671488A patent/DK169907B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0318905A3 (en) | 1990-09-19 |
| EP0318905A2 (en) | 1989-06-07 |
| ATE107203T1 (en) | 1994-07-15 |
| DK671488A (en) | 1989-06-03 |
| DE3850225D1 (en) | 1994-07-21 |
| DE3740750A1 (en) | 1989-06-15 |
| DK671488D0 (en) | 1988-12-01 |
| DK169907B1 (en) | 1995-04-03 |
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