EP1029606A1 - Method for the production of metal tubes, in particular copper tubes and transport structure - Google Patents
Method for the production of metal tubes, in particular copper tubes and transport structure Download PDFInfo
- Publication number
- EP1029606A1 EP1029606A1 EP99103277A EP99103277A EP1029606A1 EP 1029606 A1 EP1029606 A1 EP 1029606A1 EP 99103277 A EP99103277 A EP 99103277A EP 99103277 A EP99103277 A EP 99103277A EP 1029606 A1 EP1029606 A1 EP 1029606A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- large coils
- coils
- tubes
- stacked
- transport
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/16—Unwinding or uncoiling
- B21C47/18—Unwinding or uncoiling from reels or drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/28—Drums or other coil-holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/18—Constructional details
- B65H75/20—Skeleton construction, e.g. formed of wire
Definitions
- the invention relates to a method for producing pipes from metal, especially copper pipes, as well as a transport frame for the coils Tube.
- Copper pipes are usually made from bolts in a hot forming process by extrusion or cross rolling.
- the blanks produced in this way (press tubes) are then further processed by vocational rolling or drawing. Further processing can take place in a single train or in a multiple train.
- the further transport to the next processing stage is usually carried out by a basket transport system. So far, it has been known to continuously produce copper pipes in a line in a plant, starting from the casting of the billets, the hot forming process and the final drawing process.
- the extrusion systems used for the hot forming process are very costly to buy and have a large production capacity. For the special production of copper pipes, also by large producers, the capacity of an extrusion system can only be used to a certain extent.
- the invention was based on the object of a method for producing pipes from metal, especially copper pipes, to create improved utilization of the production facilities as well as a particularly economical production enables and with which finished pipes can be produced easily and inexpensively. It is also an object of the invention to provide a suitable transport frame for the To create large coils of coiled pipes.
- the pre-tubes After drawing the tubes on a continuous drawing machine, for example, to pre-tubes with an outer diameter of 35 to 80 mm and a wall thickness of 1.5 to 4.0 mm, the pre-tubes are wound into large coils on a suitable winding machine.
- the large coils are preferably wound layer by layer into so-called LWC coils with a constant inside diameter of at least 800 mm and an outside diameter of up to 3500 mm. So far, LWC pipes have only been used for near-end dimensions, ie the wall thickness is less than or equal to 1 mm, for example. It has not been previously known to use front pipes for further drawing with much thicker wall thicknesses over 1 mm, such as 44 x 2 mm or 44 x 1.65 mm.
- large coils with a unit weight of 400 to 1500 kg are obtained.
- the large coils can be stored temporarily and transported to a second production facility using suitable means of transport immediately after their manufacture.
- the large coils are stacked on suitable transport racks, in a number of three to seven large coils.
- the transport racks with the large coils are then placed on the loading area of the transport vehicle, for example a truck, by means of lifting devices and transported to the final production site.
- So-called spiders can be used as a transport frame, on which the large coils are stacked in a horizontal arrangement.
- Another variant is to weld several large coils as a composite in shrink film and place them horizontally on flat pallets.
- Another variant is the standing storage of the large coils on prism pallets, whereby the inside of the prism pallets can be provided with a felt pad.
- the further processing of the large coils into finished pipes can either take place directly from the means of transport or via an intermediate storage facility.
- the further processing of the delivered large coils is carried out on conventional continuous drawing machines. When transporting the large coils on spiders, they serve as transport, storage and / or drainage equipment. If the large coils are delivered lying down, on spiders or flat pallets, the frames with the large coils can be placed on a retractable discharge table, which is located directly in front of the decoiler. The coil start of the uppermost large coil is then positioned at the required working height by lowering the discharge table.
- the large coils can also be removed individually from the frames and transported to the drawing machine, for example on a forklift.
- the respective coil start is fed to a separate drain device by means of an inner gripper.
- This variant enables the coil start to be sharpened separately while the previous coil is being pulled, and the decoiler can be simplified in terms of construction. As a result, the auxiliary times for these work steps can be shortened.
- the proposed procedure leads to the advantage that the plants for the downpipe production can be fully utilized. As a result, large coils are obtained at very reasonable prices, which can be resold to third parties as an intermediate product.
- a transport frame which is particularly suitable for intermediate transport is formed by a spider consisting of a metal construction.
- the use of spiders for tubes wound into coils is not yet known.
- the proposed tubular construction of the spiders makes it possible to stack the spiders as empty goods, with at least three spiders being able to be placed one inside the other. This ensures cost-effective transportation of the empty spider.
- the space between the shaft of the spider and the inside of the large coils can be compensated for by an inflatable air cushion element.
- the large coils are locked by means of a spreading device which can be attached to the shaft.
- extrusion tubes with an outer diameter of 50 mm and a wall thickness of 3 mm are pressed by extrusion of copper bolts, which are then pulled in a train to pre-tubes of the dimension 44 x 2 mm can be processed.
- the down tube drawn to this dimension is wound layer by layer on a conventional winding system to form an LWC large coil with an outside diameter of 2175 mm and an inside diameter of 1250 mm with a winding height of 350 mm.
- the large coil has a weight of 1000 kg and the tube length of the wound material is 426 m per large coil. 5 large coils are stacked horizontally on a spider.
- the loading area of a truck trailer truck is loaded with 5 spiders with 5 large coils each.
- the large coils are transported from the central production site to the respective pipe processors in the aforementioned manner.
- the spiders are removed from the truck by forklift trucks and transported by a chain conveyor to a lifting table and placed vertically on this.
- the lifting table places the Spider on receiving forks, approx. 400 mm down.
- the forks drive the spider over the uncoiler.
- the spider crown takes over the spider by lifting, the forks move back to their starting position.
- the decoiler or discharge table is lowered by approx. 2 m until the top coil is at the level of the feed line.
- the pipe start of the top coil is positioned at working height and the required tangent is attached.
- the decoiler is designed for a circumferential deceleration speed of up to 100 m / min, the speed between the decoiler and the continuous drawing machine being synchronized.
- the start of the pipe is placed in the bending apparatus and fed to the sharpening unit, in which the lubricant is introduced, the mandrels are set and the sharpening takes place. Then the start of the pipe is placed in the driving apparatus and fed to the drawing machine.
- a 44 x 2 mm tube is drawn from the 44 x 2 mm front tube, which is wound into a basket, which is transported to the subsequent drawing machine in order to carry out the next production train.
- the discharge table (decoiler) is continuously moved upwards, depending on the speed of the discharge, so that the pipe that runs out is always at working height.
- the spider is unstacked at the pipe processor as the final producer and the large coils are placed one after the other on a stationary decoiler.
- This simplified variant enables a separate sharpening of the tube start of the individual large coils while the previous large coil is being pulled.
- the large coils are unstacked by the spider immediately before the decoiler.
- the large coils are delivered on prism pallets.
- FIG. 3 shows an LWC large coil 9.
- This can also consist of a position-wound copper pipe 44 x 1.65 mm, with an outer diameter OD of 2300 mm and an inner diameter ID of 1250 mm and a height H of 350 mm.
- the coiled tube length of such a large coil is 512 mm.
- the LWC coil has a weight of 1000 kg.
- Several of these large coils 9, for example five, are stacked and transported on a spider according to the type shown in FIGS. 1 and 2.
- the spider consists of a base part 1 and a centrally arranged shaft 2 as a welded tube construction.
- the bottom part 1 is formed by an inner ring 3 and an outer ring 4, which are connected to one another via tubular pieces 5 arranged in the form of spokes.
- Four tubes 6 are vertically fastened to the inner tube 3 at the same distance from one another and are connected to one another at their upper end by means of tubular webs 7.
- the length or height of the tubes 6 depends on the number of large coils that are to be stacked on the spider.
- the spiders are very sturdy because they have to carry loads of up to 7 t. The proposed design of the spider enables them to be stacked one inside the other as empties.
- the individual spiders are placed one inside the other by rotating them at a certain angle about the central axis, the respective base parts 1 resting on one another.
- the following possibilities exist, for example, for securing the large coils 9 stacked on the spiders during transport on a vehicle.
- a spreading device is attached to the shaft 2 of the spider, by means of which the individual large coils are locked in their position.
- an inflatable air cushion element can be arranged around the shaft 2 of the spider, by means of which the space between the shaft 2 and the inside 10 of the large coils 9 is at least partially filled after inflation, so that the large coils 9 slip during transport is excluded.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Pallets (AREA)
- Warehouses Or Storage Devices (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung von Rohren aus Metall, insbesondere Kupferrohre, sowie ein Transportgestell für die zu Coils aufgewickelten Rohre.The invention relates to a method for producing pipes from metal, especially copper pipes, as well as a transport frame for the coils Tube.
Kupferrohre werden üblicherweise aus Bolzen in einem Warmformgebungsprozeß
durch Strangpressen oder Schrägwalzen hergestellt. Die auf diese Weise erzeugten
Luppen (Pressrohre) werden anschließend durch Pilgerwalzen oder Ziehen weiterverarbeitet.
Die Weiterverarbeitung kann im Einzelzug oder durch Mehrfachzug
erfolgen. Der Weitertransport zur nächsten Verarbeitungsstufe erfolgt in der Regel
durch ein Korbtransportsystem.
Bisher ist es bekannt, Kupferrohre in einer Betriebsstätte kontinuierlich in einer Linie
herzustellen, ausgehend vom Gießen der Bolzen, dem Warmformgebungsprozeß und
dem abschließenden Ziehprozeß.
Die für den Warmformgebungsprozeß eingesetzten Strangpreßanlagen sind in ihrer
Anschaffung sehr kostenaufwendig und verfügen über eine große Fertigungskapazität.
Für die spezielle Herstellung von Kupferrohren, auch durch Großproduzenten, kann
die Kapazität einer Strangpreßanlage nur zu einem Teil ausgelastet werden. Eine
Herstellung anderer Produktionssortimente auf dieser Anlage, wie z.B. Profile oder
Stangen, führt zwar zu einer verbesserten Auslastung der Strangpreßanlage, andererseits
entstehen aber durch die erforderlichen Umrüstarbeiten erhebliche Zusatzkosten,
die sich nachteilig auf den Preis der Halbzeuge auswirken. Außerdem steht die Anlage
während der Umbauarbeiten still, was zu einer weiteren Kostenbelastung führt.Copper pipes are usually made from bolts in a hot forming process by extrusion or cross rolling. The blanks produced in this way (press tubes) are then further processed by pilgrim rolling or drawing. Further processing can take place in a single train or in a multiple train. The further transport to the next processing stage is usually carried out by a basket transport system.
So far, it has been known to continuously produce copper pipes in a line in a plant, starting from the casting of the billets, the hot forming process and the final drawing process.
The extrusion systems used for the hot forming process are very costly to buy and have a large production capacity. For the special production of copper pipes, also by large producers, the capacity of an extrusion system can only be used to a certain extent. A production of other production ranges on this system, such as profiles or bars, leads to an improved utilization of the extrusion system, but on the other hand, the necessary retrofitting work results in considerable additional costs, which have a disadvantageous effect on the price of the semi-finished products. In addition, the system stands still during the renovation work, which leads to a further cost burden.
Der Erfindung lag die Aufgabe zugrunde, ein Verfahren zur Herstellung von Rohren aus Metall, insbesondere Kupferrohre, zu schaffen, das eine verbesserte Auslastung der Fertigungsanlagen sowie eine besonders wirtschaftliche Fertigung ermöglicht und mit dem Fertigrohre einfach und kostengünstig produziert werden können. Ferner ist es Aufgabe der Erfindung, ein geeignetes Transportgestell für die zu Großcoils aufgewickelten Rohre zu schaffen. The invention was based on the object of a method for producing pipes from metal, especially copper pipes, to create improved utilization of the production facilities as well as a particularly economical production enables and with which finished pipes can be produced easily and inexpensively. It is also an object of the invention to provide a suitable transport frame for the To create large coils of coiled pipes.
Erfindungsgemäß wird die Aufgabe durch die im Anspruch 1 angegebenen Merkmale
gelöst, geeignete Ausgestaltungsvarianten sind in den Ansprüche 2 bis 12 angegeben.
Ein Transportgestell für die zu Großcoils aufgewickelten lagengespulten Rohre ist
Gegenstand des Anspruches 13. Weitere Ausführungsvarianten sind in den
Ansprüchen 14 und 15 angegeben.
Die vorgeschlagene diskontinuierliche Verfahrensweise, Rohre aus Metall, vorzugsweise
Kupferrohre, in zwei örtlich getrennten Fertigungsstätten, erst als Vorprodukt
und zu einem späteren Zeitpunkt als Fertigerzeugnis herzustellen, führt zu einer
wesentlichen Verbesserung der Wirtschaftlichkeit der gesamten Rohrfertigung. In
einer gesonderten Fertigungsstätte werden zuerst durch die Verfahrensschritte
Strangpressen oder Warmwalzen und Ziehen aufwickelbare Vorrohre hergestellt. Die
Verfahrensstufen Strangpressen und Warmwalzen mit jeweils nachfolgendem Ziehen
erfolgen nach der aus der Kupferrohrfertigung allgemein bekannten und üblichen
Technologie. Nach dem Ziehen der Rohre auf beispielsweise einer Konti-Ziehmaschine
zu Vorrohren mit einem Außendurchmesser von 35 bis 80 mm und einer Wanddicke
von 1,5 bis 4,0 mm werden die Vorrohre auf einer geeigneten Spulmaschine zu
Großcoils aufgewickelt. Bevorzugterweise werden die Großcoils Lage an Lage
gewickelt, zu sogenannten LWC-Coils, mit einem konstanten Innendurchmesser von
mindestens 800 mm und einem Außendurchmesser bis maximal 3500 mm. Bisher
wurden LWC-Rohre nur für endnahe Abmessungen verwendet, d.h. die Wanddicke ist
z.B. kleiner gleich 1 mm. Eine Verwendung von Vorrohren zum Weiterziehen mit
wesentlich stärkeren Wanddicken über 1 mm, wie z.B. 44 x 2 mm oder 44 x 1,65 mm,
ist bisher nicht bekannt. Je nach Außendurchmesser und Wanddicke der Vorrohre
werden Großcoils mit einem Stückgewicht von 400 bis 1500 kg erhalten. Die Großcoils
können zwischengelagert und unmittelbar nach ihrer Herstellung zu einer zweiten
Fertigungsstätte mit geeigneten Transportmitteln transportiert werden. Die Großcoils
werden auf geeigneten Transportgestellen gestapelt, in einer Anzahl von drei bis
sieben Großcoils. Die Transportgestelle mit den Großcoils werden dann mittels
Hebezeugen auf die Ladefläche des Transportfahrzeuges, z.B. einem LKW, abgestellt
und an den endgültigen Fertigungsort transportiert. Als Transportgestell können
sogenannte Spider eingesetzt werden, auf denen die Großcoils in liegender
Anordnung gestapelt werden. Eine andere Variante besteht darin, mehrere Großcoils
als Verbund in Schrumpffolie einzuschweißen und diese liegend auf Flachpaletten
abzustellen. Eine weitere Variante stellt die stehende Ablage der Großcoils auf
Prismenpaletten dar, wobei die Innenseite der Prismenpaletten mit einer Filzauflage
versehen sein kann.
Die Weiterverarbeitung der Großcoils zu Fertigrohren kann entweder direkt vom Transportmittel
aus erfolgen oder über ein Zwischenlager. Die Weiterverarbeitung der
angelieferten Großcoils wird auf üblichen Konti-Ziehmaschinen durchgeführt. Beim
Transport der Großcoils auf Spidern dienen diese als Transport-, Lager- und/oder
Ablaufeinrichtung. Werden die Großcoils liegend, auf Spidern oder Flachpaletten
angeliefert, so können die Gestelle mit den Großcoils auf einem versenkbaren Ablauftisch
abgestellt werden, der sich unmittelbar vor der Abwickelhaspel befindet. Das
Coilanfang des obersten Großcoils wird dann durch Absenken des Ablauftisches in
der erforderlichen Arbeitshöhe positioniert.
Die Großcoils können auch einzeln von den Gestellen abgenommen und bis an die
Ziehmaschine, z.B. auf einem Gabelstapler, transportiert werden. Mittels eines Innengreifers
wird der jeweilige Coilanfang einer gesonderten Ablaufeinrichtung zugeführt.
Diese Variante ermöglicht ein separates Anspitzen des Coilanfangs während des
Ziehens des vorhergehenden Coils und der Ablaufhaspel kann konstruktiv vereinfacht
werden. Dadurch können die Hilfszeiten für diese Arbeitsschritte verkürzt werden.
Je nach den Erfordernissen besteht auch die Möglichkeit, die Großcoils vor dem
abschließenden Ziehen durch eine zusätzliche Wärmebehandlung auf den Festigkeitszustand
"weich" einzustellen.
Die vorgeschlagene Verfahrensweise führt zu dem Vorteil, daß die Anlagen für die
Vorrohrproduktion vollständig ausgelastet werden können. Dadurch werden Großcoils
zu sehr günstigen Preisen erhalten, die z.B. an Dritte als Zwischenprodukt weiterverkauft
werden können. Der Finalproduzent benötigt dann lediglich eine Konti-Ziehmaschine
mit den üblichen Zusatzeinrichtungen, um aus den Großcoils
Fertigrohre der gewünschten Abmessungen herzustellen. Trotz der zusätzlichen
Transportkosten überwiegen die Vorteile aus der besonders wirtschaftlichen
zentralisierten Vorrohrfertigung. Da die Großcoils bereits auf eine Wanddicke von 1,5
bis 4,0 mm gezogen sind, kann im Rahmen der Endfertigung in der Regel auf einen
Zug verzichtet werden.
Ein für den Zwischentransport besonders geeignetes Transportgestell bildet ein aus
einer Metallkonstruktion bestehender Spider. Die Verwendung von Spidern für zu Coils
aufgewickelten Rohren ist bisher noch nicht bekannt. Die vorgeschlagene Rohrkonstruktion
der Spider ermöglicht es, die Spider als Leergut zu stapeln, wobei
mindestens drei Spider ineinandergesetzt werden können. Dadurch wird ein kostengünstiger
Transport der leeren Spider gewährleistet. Um ein Verrutschen der
Großcoils auf dem Spider während des Transportes vollkommen auszuschließen, kann
der Zwischenraum zwischen dem Schaft des Spiders und der Innenseite der Großcoils
durch ein aufblasbares Luftkissenelement ausgeglichen werden. Gemäß einer anderen
Variante ist vorgesehen, daß mittels einer an dem Schaft befestigbaren Spreizvorrichtung
die Großcoils arretiert werden. According to the invention the object is achieved by the features specified in
The proposed discontinuous procedure of producing pipes made of metal, preferably copper pipes, in two locally separate production sites, first as a preliminary product and at a later point in time as a finished product, leads to a significant improvement in the economy of the entire pipe production. In a separate production facility, extrudates that can be wound up are first produced by the process steps extrusion or hot rolling and drawing. The process steps of extrusion and hot rolling, each with subsequent drawing, take place according to the technology which is generally known and customary from copper tube production. After drawing the tubes on a continuous drawing machine, for example, to pre-tubes with an outer diameter of 35 to 80 mm and a wall thickness of 1.5 to 4.0 mm, the pre-tubes are wound into large coils on a suitable winding machine. The large coils are preferably wound layer by layer into so-called LWC coils with a constant inside diameter of at least 800 mm and an outside diameter of up to 3500 mm. So far, LWC pipes have only been used for near-end dimensions, ie the wall thickness is less than or equal to 1 mm, for example. It has not been previously known to use front pipes for further drawing with much thicker wall thicknesses over 1 mm, such as 44 x 2 mm or 44 x 1.65 mm. Depending on the outside diameter and wall thickness of the front pipes, large coils with a unit weight of 400 to 1500 kg are obtained. The large coils can be stored temporarily and transported to a second production facility using suitable means of transport immediately after their manufacture. The large coils are stacked on suitable transport racks, in a number of three to seven large coils. The transport racks with the large coils are then placed on the loading area of the transport vehicle, for example a truck, by means of lifting devices and transported to the final production site. So-called spiders can be used as a transport frame, on which the large coils are stacked in a horizontal arrangement. Another variant is to weld several large coils as a composite in shrink film and place them horizontally on flat pallets. Another variant is the standing storage of the large coils on prism pallets, whereby the inside of the prism pallets can be provided with a felt pad.
The further processing of the large coils into finished pipes can either take place directly from the means of transport or via an intermediate storage facility. The further processing of the delivered large coils is carried out on conventional continuous drawing machines. When transporting the large coils on spiders, they serve as transport, storage and / or drainage equipment. If the large coils are delivered lying down, on spiders or flat pallets, the frames with the large coils can be placed on a retractable discharge table, which is located directly in front of the decoiler. The coil start of the uppermost large coil is then positioned at the required working height by lowering the discharge table.
The large coils can also be removed individually from the frames and transported to the drawing machine, for example on a forklift. The respective coil start is fed to a separate drain device by means of an inner gripper. This variant enables the coil start to be sharpened separately while the previous coil is being pulled, and the decoiler can be simplified in terms of construction. As a result, the auxiliary times for these work steps can be shortened. Depending on the requirements, it is also possible to set the large coils to the "soft" strength state by means of an additional heat treatment before the final drawing.
The proposed procedure leads to the advantage that the plants for the downpipe production can be fully utilized. As a result, large coils are obtained at very reasonable prices, which can be resold to third parties as an intermediate product. The final producer then only needs a continuous drawing machine with the usual additional equipment to produce finished pipes of the desired dimensions from the large coils. Despite the additional transport costs, the advantages of the particularly economical centralized pre-pipe production outweigh the costs. Since the large coils are already drawn to a wall thickness of 1.5 to 4.0 mm, there is usually no need for a train during the final production.
A transport frame which is particularly suitable for intermediate transport is formed by a spider consisting of a metal construction. The use of spiders for tubes wound into coils is not yet known. The proposed tubular construction of the spiders makes it possible to stack the spiders as empty goods, with at least three spiders being able to be placed one inside the other. This ensures cost-effective transportation of the empty spider. In order to completely prevent the large coils from slipping on the spider during transport, the space between the shaft of the spider and the inside of the large coils can be compensated for by an inflatable air cushion element. According to another variant it is provided that the large coils are locked by means of a spreading device which can be attached to the shaft.
Ein Vorteil dieser Spider besteht auch darin, daß die lagegespulten Cu-Vorrohre für die Weiterverarbeitung direkt vom Spider ablaufen können, ohne vorher die Coils vom Spider abstapeln zu müssen.An advantage of this spider is that the position-coiled copper tubes for the Further processing can run directly from the spider, without the coils from Having to stack the spider.
Die Erfindung wird nachstehend näher erläutert. In der zugehörigen Zeichnung zeigen
In einer zentralen Fertigungsstätte werden in einer Vorfertigungslinie, bestehend aus
einer herkömmlichen Strangpresse und einer Konti-Ziehmaschine, durch Strangpessen
von Kupferbolzen Vorrohre mit einem Außendurchmesser von 50 mm und
einer Wanddicke von 3 mm gepreßt, die durch nachfolgendes Ziehen in einem Zug zu
Vorrohren der Abmessung 44 x 2 mm weiterverarbeitet werden. Das auf diese
Abmessung gezogene Vorrohr wird auf einer herkömmlichen Spulanlage Lage an Lage
zu einem LWC-Großcoil mit einem Außendurchmesser von 2175 mm und einem Innendurchmesser
von 1250 mm mit einer Wickelhöhe von 350 mm gewickelt. Das Großcoil
hat ein Gewicht von 1000 kg und die Rohrlänge des aufgewickelten Materials beträgt je
Großcoil 426 m. Jeweils 5 Großcoils werden liegend auf einem Spider gestapelt. Die
Ladefläche eines LKW-Lastzuges wird mit 5 Spidern zu je 5 Großcoils beladen. Die
Großcoils werden in der vorgenannten Art und Weise von dem zentralen Fertigungsstandort
zu den jeweiligen Rohrverarbeitern transportiert.
Am Rohrverarbeitungsstandort werden die Spider mittels Gabelstapler vom LKW
entnommen und von einem Kettenförderer auf einen Hubtisch transportiert und auf
diesem senkrecht abgestellt. Der Hubtisch setzt den Spider auf Aufnahmegabeln, ca.
400 mm nach unten. Die Gabeln fahren den Spider über den Abhaspel. Die
Haspelkrone übernimmt den Spider durch Anheben, die Gabeln fahren in ihre
Ausgangsposition zurück. Der Ablaufhaspel bzw. Ablauftisch wird um ca. 2 m
abgesenkt, bis das oberste Coil in Höhe der Einziehlinie ist. Der Rohranfang des
obersten Coils wird in Arbeitshöhe positioniert und die erforderliche Tangente
angebracht. Der Ablaufhaspel ist für eine Umfangsablaufgeschwindigkeit von bis zu
100 m/min ausgelegt, wobei die Geschwindigkeit zwischen dem Ablaufhaspel und der
Konti-Ziehmaschine synchronisiert ist. Der Rohranfang wird in den Aufbiegeapparat
eingelegt und der Anspitzeinheit zugeführt, in der das Einbringen des Schmiermittels,
das Setzen der Dorne und das Anspitzen erfolgen. Danach wird der Rohranfang in den
Treibapparat eingelegt und der Ziehmaschine zugeführt.
Auf dieser wird aus dem Vorrohr 44 x 2 mm im ersten Zug ein Rohr der Abmessung
42 x 1,5 mm gezogen, das in einen Korb gewickelt wird, der zu der nachfolgenden
Ziehmaschine transportiert wird, um den nächsten Fertigungszug durchzuführen.
Während des Ablaufs der nachfolgenden Coils wird der Ablauftisch (Ablaufhaspel)
kontinuierlich, in Abhängigkeit von der Ablaufgeschwindigkeit, nach oben bewegt,
damit sich das ablaufende Rohr ständig in Arbeitshöhe befindet.
Nach dem Ablauf aller Coils vom Spider wird dieser vom Ablauftisch abgenommen
und ein neuer Spider in der vorbeschriebenen Art und Weise zugeführt.
Gemäß einer anderen Variante werden beim Rohrverarbeiter als Finalproduzent die
Spider entstapelt und die Großcoils nacheinander auf einen stationären Ablaufhaspel
aufgesetzt. Diese vereinfachte Variante ermöglicht ein separates Anspitzen des
Rohranfanges der einzelnen Großcoils während des Ziehens des vorhergehenden
Großcoils. Das Entstapeln der Großcoils von dem Spider wird dabei unmittelbar vor
dem Ablaufhaspel vorgenommen.
Gemäß einer dritten Variante werden die Großcoils auf Prismenpaletten angeliefert.
Die Prismenpaletten werden von dem Fahrzeug abgehoben und danach entstapelt und
die Großcoils bereits vereinzelt dem Kettenförderer übergeben.
Alle anderen Arbeitsschritte erfolgen in analoger Weise, wie vorstehend bereits
erläutert.
In der Figur 3 ist ein LWC- Großcoil 9 dargestellt. Dieses kann auch aus einem lagegespulten
Cu-Rohr 44 x 1,65 mm bestehen, mit einem Außendurchmesser OD von
2300 mm und einem Innendurchmesser ID von 1250 mm sowie einer Höhe H von
350 mm. Die aufgewickelte Rohrlänge eines solchen Großcoils beträgt 512 mm. Das
LWC-Coil besitzt ein Gewicht von 1000 kg. Mehrere dieser Großcoils 9, z.B. fünf,
werden auf einem Spider gemäß der in den Figuren 1 und 2 gezeigten Bauart gestapelt
und transportiert. Der Spider besteht aus einem Bodenteil 1 und einem zentrisch
angeordneten Schaft 2 als geschweißte Rohrkonstruktion. Der Bodenteil 1 wird durch
einen Innenring 3 und einen Außenring 4, die über speichenförmig angeordnete
Rohrstücken 5 miteinander verbunden sind, gebildet. An dem Innenrohr 3 sind in
gleichem Abstand zueinander vier Rohre 6 vertikal befestigt, die an ihrem oberen Ende
durch rohrförmige Stege 7 kreuzweise miteinander verbunden sind. Die Länge bzw.
Höhe der Rohre 6 richtet sich nach der Anzahl der Großcoils, die auf dem Spider
gestapelt werden sollen. Die Spider sind sehr stabil ausgeführt, da diese Lasten von
bis zu 7 t aufnehmen müssen. Die vorgesehene konstruktive Ausführung der Spider
ermöglicht, daß diese als Leergut ineinander gestapelt werden können. Die einzelnen
Spider werden durch Drehen in einem bestimmten Winkel um die zentrale Achse
ineinandergesetzt, wobei die jeweiligen Bodenteile 1 aufeinanderaufliegen.
Zur Sicherung der auf den Spidern gestapelten Großcoils 9 während des Transportes
auf einem Fahrzeug bestehen z.B. folgende Möglichkeiten. An dem Schaft 2 des
Spiders wird eine Spreizvorrichtung befestigt, durch die die einzelnen Großcoils in
ihrer Lage arretiert werden. Gemäß einer anderen Variante kann um den Schaft 2 des
Spiders ein aufblasbares Luftkissenelement angeordnet werden, durch das nach dem
Aufblasen der Zwischenraum zwischen dem Schaft 2 und der Innenseite 10 der
Großcoils 9 zumindest teilweise ausgefüllt ist, so daß ein Verrutschen der Großcoils 9
während des Transportes ausgeschlossen ist.In a central production facility, in a prefabrication line consisting of a conventional extrusion press and a continuous drawing machine, extrusion tubes with an outer diameter of 50 mm and a wall thickness of 3 mm are pressed by extrusion of copper bolts, which are then pulled in a train to pre-tubes of the dimension 44 x 2 mm can be processed. The down tube drawn to this dimension is wound layer by layer on a conventional winding system to form an LWC large coil with an outside diameter of 2175 mm and an inside diameter of 1250 mm with a winding height of 350 mm. The large coil has a weight of 1000 kg and the tube length of the wound material is 426 m per large coil. 5 large coils are stacked horizontally on a spider. The loading area of a truck trailer truck is loaded with 5 spiders with 5 large coils each. The large coils are transported from the central production site to the respective pipe processors in the aforementioned manner.
At the tube processing site, the spiders are removed from the truck by forklift trucks and transported by a chain conveyor to a lifting table and placed vertically on this. The lifting table places the Spider on receiving forks, approx. 400 mm down. The forks drive the spider over the uncoiler. The spider crown takes over the spider by lifting, the forks move back to their starting position. The decoiler or discharge table is lowered by approx. 2 m until the top coil is at the level of the feed line. The pipe start of the top coil is positioned at working height and the required tangent is attached. The decoiler is designed for a circumferential deceleration speed of up to 100 m / min, the speed between the decoiler and the continuous drawing machine being synchronized. The start of the pipe is placed in the bending apparatus and fed to the sharpening unit, in which the lubricant is introduced, the mandrels are set and the sharpening takes place. Then the start of the pipe is placed in the driving apparatus and fed to the drawing machine.
On the first tube, a 44 x 2 mm tube is drawn from the 44 x 2 mm front tube, which is wound into a basket, which is transported to the subsequent drawing machine in order to carry out the next production train. During the course of the subsequent coils, the discharge table (decoiler) is continuously moved upwards, depending on the speed of the discharge, so that the pipe that runs out is always at working height.
After all the coils from the spider have run out, they are removed from the discharge table and a new spider is fed in the manner described above. According to another variant, the spider is unstacked at the pipe processor as the final producer and the large coils are placed one after the other on a stationary decoiler. This simplified variant enables a separate sharpening of the tube start of the individual large coils while the previous large coil is being pulled. The large coils are unstacked by the spider immediately before the decoiler.
According to a third variant, the large coils are delivered on prism pallets. The prism pallets are lifted from the vehicle and then destacked and the large coils are handed over to the chain conveyor.
All other steps are carried out in an analogous manner, as already explained above.
FIG. 3 shows an LWC large coil 9. This can also consist of a position-wound copper pipe 44 x 1.65 mm, with an outer diameter OD of 2300 mm and an inner diameter ID of 1250 mm and a height H of 350 mm. The coiled tube length of such a large coil is 512 mm. The LWC coil has a weight of 1000 kg. Several of these large coils 9, for example five, are stacked and transported on a spider according to the type shown in FIGS. 1 and 2. The spider consists of a
Claims (15)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT99103277T ATE224247T1 (en) | 1999-02-19 | 1999-02-19 | METHOD FOR PRODUCING METAL PIPES, IN PARTICULAR COPPER PIPES, AND TRANSPORT RACK |
EP99103277A EP1029606B1 (en) | 1999-02-19 | 1999-02-19 | Method for the production of metal tubes, in particular copper tubes and transport structure |
ES99103277T ES2183446T3 (en) | 1999-02-19 | 1999-02-19 | PROCEDURE FOR THE MANUFACTURE OF METAL TUBES, PARTICULARLY COPPER TUBES, AND TRANSPORT FRAME. |
PT99103277T PT1029606E (en) | 1999-02-19 | 1999-02-19 | METHOD FOR PRODUCING METAL TUBES IN PARTICULAR OF COPPER TUBES AND TRANSPORTATION DEVICE |
DK99103277T DK1029606T3 (en) | 1999-02-19 | 1999-02-19 | Process for the manufacture of metal pipes, especially copper pipes, and transport rack |
DE59902740T DE59902740D1 (en) | 1999-02-19 | 1999-02-19 | Process for the production of pipes made of metal, in particular copper pipes, and transport frame |
ARP000100641A AR022599A1 (en) | 1999-02-19 | 2000-02-15 | PROCEDURE FOR MANUFACTURING METAL TUBES, AND TRANSPORTATION SKELETON FOR WINDED TUBES IN ROLLS USED IN THE SAME |
CA002299012A CA2299012A1 (en) | 1999-02-19 | 2000-02-18 | Process for producing metal tubes, and transportation rack |
BR0000848-6A BR0000848A (en) | 1999-02-19 | 2000-02-18 | Process for manufacturing tubes from metal, especially copper tubes, and transport structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99103277A EP1029606B1 (en) | 1999-02-19 | 1999-02-19 | Method for the production of metal tubes, in particular copper tubes and transport structure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1029606A1 true EP1029606A1 (en) | 2000-08-23 |
EP1029606B1 EP1029606B1 (en) | 2002-09-18 |
Family
ID=8237590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99103277A Expired - Lifetime EP1029606B1 (en) | 1999-02-19 | 1999-02-19 | Method for the production of metal tubes, in particular copper tubes and transport structure |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1029606B1 (en) |
AR (1) | AR022599A1 (en) |
AT (1) | ATE224247T1 (en) |
BR (1) | BR0000848A (en) |
CA (1) | CA2299012A1 (en) |
DE (1) | DE59902740D1 (en) |
DK (1) | DK1029606T3 (en) |
ES (1) | ES2183446T3 (en) |
PT (1) | PT1029606E (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101298084B (en) * | 2008-07-03 | 2010-08-04 | 中铝洛阳铜业有限公司 | Technique for processing D type copper pipe with unequal-radius wall thickness or equal-radius wall thickness |
CN114653778A (en) * | 2022-05-24 | 2022-06-24 | 广东科莱博科技有限公司 | Winding and unwinding equipment and method for continuous transfer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110934092B (en) * | 2019-12-18 | 2023-10-27 | 杭州电子科技大学 | Poultry drinking water pipe blanking device and blanking method thereof |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1115679B (en) * | 1958-09-27 | 1961-10-26 | Wilhelm Stoehr Fa | Storage and circular conveyor device interacting with a pulling device and having conveyor tracks lying one above the other |
US3827274A (en) * | 1972-10-20 | 1974-08-06 | Aetna Standard Eng Co | Strand drawing apparatus including means for preparing the leading end of the strand |
FR2340149A1 (en) * | 1976-02-05 | 1977-09-02 | Benteler Werke Ag | Continuous welding machine for steel tubes - has steel strip feed coil and guide to feed successive strips into forming and welding machines |
US4068971A (en) * | 1976-03-16 | 1978-01-17 | Bundy Corporation | Universal coil carrier |
FR2528391A1 (en) * | 1982-06-09 | 1983-12-16 | Trefimetaux | DEVICE FOR HANDLING AND STORING IN STACKS OF CONTAINER BASKETS FOR WOUND PRODUCTS |
DE3902844C1 (en) * | 1989-01-27 | 1989-11-30 | Mannesmann Ag, 4000 Duesseldorf, De | Apparatus for the automatic feeding of bull-block machines with drawing stock in strand form, especially tubes |
DE4332140A1 (en) * | 1993-09-17 | 1995-04-06 | Mannesmann Ag | Method and apparatus for coiling and further treatment of tubes made of nonferrous metals, especially copper and copper alloys |
-
1999
- 1999-02-19 PT PT99103277T patent/PT1029606E/en unknown
- 1999-02-19 DE DE59902740T patent/DE59902740D1/en not_active Expired - Fee Related
- 1999-02-19 DK DK99103277T patent/DK1029606T3/en active
- 1999-02-19 AT AT99103277T patent/ATE224247T1/en not_active IP Right Cessation
- 1999-02-19 ES ES99103277T patent/ES2183446T3/en not_active Expired - Lifetime
- 1999-02-19 EP EP99103277A patent/EP1029606B1/en not_active Expired - Lifetime
-
2000
- 2000-02-15 AR ARP000100641A patent/AR022599A1/en unknown
- 2000-02-18 BR BR0000848-6A patent/BR0000848A/en not_active Application Discontinuation
- 2000-02-18 CA CA002299012A patent/CA2299012A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1115679B (en) * | 1958-09-27 | 1961-10-26 | Wilhelm Stoehr Fa | Storage and circular conveyor device interacting with a pulling device and having conveyor tracks lying one above the other |
US3827274A (en) * | 1972-10-20 | 1974-08-06 | Aetna Standard Eng Co | Strand drawing apparatus including means for preparing the leading end of the strand |
FR2340149A1 (en) * | 1976-02-05 | 1977-09-02 | Benteler Werke Ag | Continuous welding machine for steel tubes - has steel strip feed coil and guide to feed successive strips into forming and welding machines |
US4068971A (en) * | 1976-03-16 | 1978-01-17 | Bundy Corporation | Universal coil carrier |
FR2528391A1 (en) * | 1982-06-09 | 1983-12-16 | Trefimetaux | DEVICE FOR HANDLING AND STORING IN STACKS OF CONTAINER BASKETS FOR WOUND PRODUCTS |
DE3902844C1 (en) * | 1989-01-27 | 1989-11-30 | Mannesmann Ag, 4000 Duesseldorf, De | Apparatus for the automatic feeding of bull-block machines with drawing stock in strand form, especially tubes |
DE4332140A1 (en) * | 1993-09-17 | 1995-04-06 | Mannesmann Ag | Method and apparatus for coiling and further treatment of tubes made of nonferrous metals, especially copper and copper alloys |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101298084B (en) * | 2008-07-03 | 2010-08-04 | 中铝洛阳铜业有限公司 | Technique for processing D type copper pipe with unequal-radius wall thickness or equal-radius wall thickness |
CN114653778A (en) * | 2022-05-24 | 2022-06-24 | 广东科莱博科技有限公司 | Winding and unwinding equipment and method for continuous transfer |
CN114653778B (en) * | 2022-05-24 | 2022-09-13 | 广东科莱博科技有限公司 | Winding and unwinding equipment capable of transferring continuously |
Also Published As
Publication number | Publication date |
---|---|
EP1029606B1 (en) | 2002-09-18 |
ES2183446T3 (en) | 2003-03-16 |
PT1029606E (en) | 2003-02-28 |
BR0000848A (en) | 2000-09-12 |
DK1029606T3 (en) | 2002-12-30 |
CA2299012A1 (en) | 2000-08-19 |
ATE224247T1 (en) | 2002-10-15 |
DE59902740D1 (en) | 2002-10-24 |
AR022599A1 (en) | 2002-09-04 |
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