EP0010057A1 - Method and machine for spin forming thin-walled seamless tubular elbows - Google Patents

Method and machine for spin forming thin-walled seamless tubular elbows Download PDF

Info

Publication number
EP0010057A1
EP0010057A1 EP79810071A EP79810071A EP0010057A1 EP 0010057 A1 EP0010057 A1 EP 0010057A1 EP 79810071 A EP79810071 A EP 79810071A EP 79810071 A EP79810071 A EP 79810071A EP 0010057 A1 EP0010057 A1 EP 0010057A1
Authority
EP
European Patent Office
Prior art keywords
bend
pipe
tube
core
sheet metal
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
Application number
EP79810071A
Other languages
German (de)
French (fr)
Other versions
EP0010057B1 (en
Inventor
Heinz Blaser
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP0010057A1 publication Critical patent/EP0010057A1/en
Application granted granted Critical
Publication of EP0010057B1 publication Critical patent/EP0010057B1/en
Expired legal-status Critical Current

Links

Images

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
    • 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
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers

Definitions

  • the present invention seeks to overcome the above disadvantages by means of a method which relates to the outward pushing of thin-walled seamless pipe bends of any bend radius, bend angle, pipe diameter from a short and thick-walled pipe blank Compliance with the caliber and exact shape, with an absolutely smooth surface of the pipe bend.
  • the thin-walled pipe bend can be made with or without cylindrical pipe extensions, made of iron, copper, brass, aluminum, zinc, etc.
  • the sheet metal pipe bends made from a thick-walled pipe blank in an outflow printing process can have a wall thickness of 0.2 - 1.5 mm and more.
  • a short and thick-walled tube blank is placed on a tube bend core which gives the desired tube bend shape and is pivoted in with this in accordance with the given tube bend radius between pressure rollers of a rotating pressure roller head which rotate around and act on the tube blank and which circulate through the outflow pressure on the pivoting tube blank effect and roll it into a thin-walled sheet metal tube bender with a smooth tube surface.
  • the pressure rollers are adjusted radially towards one another in order to exert the flying pressure on the pipe bend to be formed.
  • the pipe blank can be converted into a sheet metal pipe bend with a wall thickness of approx. 0.2 to 1.5 mm, and that of any bend radius, bottom angle and pipe diameter, with an absolutely smooth pipe bend surface and accurate caliber maintenance and exact shape from a single piece without any seam .
  • a cylindrical one is used core.
  • the bow supporting the elbow is attached to the front as a core extension, whereupon the cylindrical outflow pressure. by moving a support parallel to the axis of the pressure roller head.
  • the blanks to be machined do not rotate, but are machined with flow pressure by the radially adjustable pressure rollers of the driven pressure roller head, in that the pressure rollers circle the workpiece.
  • a machine that rotatably supports a motor-driven pressure roller head with pressure rollers that can be moved and controlled radially from and against one another in a machine frame, under which a longitudinally and transversely displaceable cross slide is located on a base plate.
  • the latter is supported by a support which can be pivoted about a vertical pivot axis as the carrier of an exchangeable tube bend core which receives the tube bend blank and which, while maintaining the tube bend radius, can be pivoted in an arc shape into the pressure roller head between the rotating pressure rollers.
  • An electric motor 3 for driving a pressure roller head 4 rests on a base plate 1 of a machine frame 2.
  • the latter is rotatably mounted in the machine frame 2 by means of a hollow shaft 5 by means of bearings 6, 7.
  • a push rod 8 which is actuated hydraulically, pneumatically etc. at 9 (cylinder with piston).
  • an exchangeable cylindrical tube core 10 At the free end of the push rod protruding in the pressure roller head 4 there is an exchangeable cylindrical tube core 10, which can be replaced by a stirring core of different dimensions.
  • the push rod 8 is guided by guide bearings 11.
  • a cylinder 12 which can be pushed back and forth is pushed on, can be mechanically controlled at 13 or in some other way.
  • This has a conical inner jacket 14 for controlling three pressure rollers 15 in star shape which are radially adjustable in relation to one another in the pressure roller head 4.
  • the latter are guided in the pressure roller head 4 with guide axes 16, for example spring-loaded, so that the free ends of the axes 16 rest against the inner jacket 14.
  • guide axes 16 for example spring-loaded
  • a cross slide 19 is guided back and forth on rods 20 of the machine frame 2 on the base plate 1, while the upper cross slide part 21 is transversely adjustable.
  • a support 23 is seated on a vertical axis 22 for receiving an exchangeable tube bend core 24.
  • the thick tube blank 25 to be machined is pushed onto it.
  • the swivel radius R of the support 23 can be shortened or extended by exchanging the corresponding support 23 and at the same time adjusting the cross slide upper part 21, which is made possible by transverse slots 26 therein.
  • the support 23 is driven by an electric motor 27 via a gear 28 for exerting a swiveling movement in the radius R of the tube bend core 24 with the tube blank in the direction of the pressure roller head 4 and its rotating pressure rollers 15.
  • the cross slide is in movement connection with a rod 30 controlled by a cylinder 29, again hydraulically, pneumatically, electrically or by hand.
  • an ejection lever 31 which can be pivoted on all sides on the cross slide 19 on its upper part 21, is used, which has a fork piece 32 or the like located at the free end the bend core 24 comprises at one end of the pipe bend of the rolled sheet metal bend 33 at 36.
  • the cylindrical core extension 10 is required at the end of the pipe bend core 24, which sits on the push rod 8, which is pushed forward as an extension on the pipe bend core 24 with the push rod 8.
  • the cylindrical pipe bend extension 34 to be achieved can be the same, larger or smaller than the pipe bend diameter, as desired.
  • the cylindrical pipe bend extensions 34 can thus also be molded on widely or closely.
  • the cylinder 9 with the piston comes into action in order to bring about the longitudinal displacement of the cross slide 19, the cylinder 29 being able to cooperate with the piston, or merely being displaced.
  • extension arm 25 of the support 23 is also conceivable to design the extension arm 25 of the support 23 to be shortenable or extendable.
  • the sheet metal pipe bend 33 (Eig. 8) produced seamlessly and without seams by the machine using the machine has an absolutely smooth surface. It contains caliber and conforms to shape. As an extension of the pipe bend, it can have cylindrical pipe bend extensions 34, which can be the same as the pipe bend diameter or can be narrowed or expanded. The wall thickness measures approx. 0.2 to 1.5 mm depending on the purpose of the sheet metal pipe bend.

Abstract

1. A method for spin-forming thin-walled seamless tubular elbows with any desired elbow radius, elbow angle and tube diameter from a short and thick-walled tubular blank material using a rotatable tubular elbow corepiece, characterized in that the short and thick-walled tubular blank material has the form of a section of a segment with a curvature matching the curvature of the tubular corepiece and that the blank material is fitted over the tubular corepiece and is rotated together with said corepiece according to corresponding tubular elbow radius arch-like between and through pressing rollers of a rotating pressing roller head rotating around the blank material for acting thereon, with said rotating pressing rollers acting with flow pressure onto the rotating blank material so that the same is stretched out and rolled out into a thin-walled sheet metal tubular elbow with its length elongated to many times the length of the blank material.

Description

Bis zur Zeit bestand keine Möglichkeit, dünnwandige Blech- rohrbogen nahtlos in einem Stück zu biegen. Alle dickwandigen gezogenen Rohrbogen haben den Nachteil, dass sie in Rohrbereich sich in Kaliber verändern, hervorgerufen durch Stauchungen auf der Rohrbogcnaussenseite. Eine genaue Masshaltung und exakte Formgebung ist nicht möglich. Rohrbogen wie solche z.B. für Dachrinnenabläufe Verwendung finden, sind nach wie vor aus zwei Teilen zusammengesetzt, durch Schweiss- oder Falznaht miteinander verbunden. Aus einem Stück bestehende Rohrbogen weisen unansehnliche weit abstehende Rippen auf, die durch Stauchung der Rohrbogeninnenseite entstehen.Until now there was no possibility of seamlessly bending thin-walled sheet metal elbows in one piece. All thick-walled drawn pipe bends have the disadvantage that they change in caliber in the pipe area, caused by compression on the outside of the pipe bend. It is not possible to maintain exact dimensions and shapes. Elbows such as e.g. used for gutter drains are still composed of two parts, connected by welded or seamed seams. One-piece pipe elbows have unsightly, protruding ribs that result from compression of the inside of the pipe elbow.

Vorliegende Erfindung sucht durch ein Verfahren obige Nachteile zu beheben, das sich zum Ausfliessdrücken von dünnwandigen nahtlosen Rohrbogen von beliebigem Bogenradius, Bogenwinkel, Rohrdurchmesser aus einem kurzen und dickwandigen Rohrrohling bezieht, bei Einhaltung des Kalibers und exakter Formgebung, bei absolut glatter Oberfläche des Rohrbogens. Der dünnwandige Rohrbegen kann mit oder ohne zylindrische Rohrfortsätze hergestellt werden, aus Eisen, Kupfer, Messing, Aluminium, Zink u.s.w. Die in Ausfliessdruckverfahren aus einem dickwandigen Rohrrchling hergestellten Blech-Rohrbogen können eine Wandstärke von 0,2 - 1,5 mm und mehr aufweisen.The present invention seeks to overcome the above disadvantages by means of a method which relates to the outward pushing of thin-walled seamless pipe bends of any bend radius, bend angle, pipe diameter from a short and thick-walled pipe blank Compliance with the caliber and exact shape, with an absolutely smooth surface of the pipe bend. The thin-walled pipe bend can be made with or without cylindrical pipe extensions, made of iron, copper, brass, aluminum, zinc, etc. The sheet metal pipe bends made from a thick-walled pipe blank in an outflow printing process can have a wall thickness of 0.2 - 1.5 mm and more.

Gemäss dem vorliegenden Verfahren wird ein kurzer und dickwandiger Rohrrohling auf einen die gewünschte Rohrbogenform gebenden Rohrbogenkern aufgesetzt und mit diesem entsprechend dem gegebenen Rohrbogenradius zwischen um den Rohrrohling kreisenden und auf diesen einwirkenden Druckrollen eines rotierenden Druckrollenkopfes bogenförmig eingeschwenkt, welche umlaufenden Durchrollen den Ausfliessdruck auf den einschwenkenden Rohrrohling bewirken und diesen in einen dünnwandigen Blech-Rohrboger mit glatter Rohroberfläche auswalzen.According to the present method, a short and thick-walled tube blank is placed on a tube bend core which gives the desired tube bend shape and is pivoted in with this in accordance with the given tube bend radius between pressure rollers of a rotating pressure roller head which rotate around and act on the tube blank and which circulate through the outflow pressure on the pivoting tube blank effect and roll it into a thin-walled sheet metal tube bender with a smooth tube surface.

Während dem Einschwenkvorgang werden die Druckrollen zur Ausübung des Flieggdruckes auf den zu bildenden Rohrbogen radial aufeinander zulaufend nachgestellt. Der Rohrrohling kann auf diese Weise in einen Blechrohrbogen von ca. 0,2 bis 1,5 mm Wandstärke umgewandelt werden, und zwar von beliebigem Bogenradius, Bodenwinkel und Rohrdurchmesser, bei absolut glatter Rohrbogenoberfläche und genauster Kaliberhaltung und exakter Formgebung aus einem Stück ohne jegliche Naht.During the pivoting-in process, the pressure rollers are adjusted radially towards one another in order to exert the flying pressure on the pipe bend to be formed. In this way, the pipe blank can be converted into a sheet metal pipe bend with a wall thickness of approx. 0.2 to 1.5 mm, and that of any bend radius, bottom angle and pipe diameter, with an absolutely smooth pipe bend surface and accurate caliber maintenance and exact shape from a single piece without any seam .

Zur Erzielung von zylindrischen Rohrbogenfortsätzen am bereits ausgewalzten Blechrohrbogen wird ein zylindrischer

Figure imgb0001
kern an. den den Rohrbogen tragenden Bogenkern stirnseits als Kernverlängerung angesetzt, worauf das zylindrische Ausfliessdru. cken durch Verschieben eines Supports parallel zur Achse des Druckrollenkopfes erfolgt.To achieve cylindrical pipe bend extensions on the already rolled sheet metal pipe bend, a cylindrical one is used
Figure imgb0001
core. the bow supporting the elbow is attached to the front as a core extension, whereupon the cylindrical outflow pressure. by moving a support parallel to the axis of the pressure roller head.

Gemäss dem Verfahren ist es auch möglich, dickwandige Rohrt in dünnwandige zylindrische Blechrohre umzuarbeiten.According to the method, it is also possible to rework thick-walled tubes into thin-walled cylindrical sheet metal tubes.

Die zu bearbeitenden Rohlinge rotieren nicht, sondern sie werden durch die radial verstellbaren Druckrollen des angetriebenen Druckrollenkopfes mit Fliessdruck bearbeitet, indem die Druckrollen das Werkstück umkreisen.The blanks to be machined do not rotate, but are machined with flow pressure by the radially adjustable pressure rollers of the driven pressure roller head, in that the pressure rollers circle the workpiece.

Zur Durchführung des Verfahrens dient eine Maschine, die in einem Maschinengestell einen motorisch angetriebenen Druckrollenkopf mit radial von und gegeneinander verschiebbaren bzw. steuerbaren Druckrollen drehtbar lagert, unter welchem sich auf einer Grundplatte ein längs- und querverschiebbarer.Kreuzschlitten befindet. Auf letzterem rüht um eine vertikale Schwenkachse schwenkbarer Support als Träger eines auswechselbaren, den Rohrbogenrohling aufnehmenden Rohrbogenkern, welcher den Rohrbogenradius einhaltend, zwischen die umlaufenden Druckrollen in den Druckrollenkopf bogenförmig einschwenkbar ist.To carry out the method, a machine is used that rotatably supports a motor-driven pressure roller head with pressure rollers that can be moved and controlled radially from and against one another in a machine frame, under which a longitudinally and transversely displaceable cross slide is located on a base plate. The latter is supported by a support which can be pivoted about a vertical pivot axis as the carrier of an exchangeable tube bend core which receives the tube bend blank and which, while maintaining the tube bend radius, can be pivoted in an arc shape into the pressure roller head between the rotating pressure rollers.

Auf Leiliegenden Zeichnungen ist die Maschine in einer beispielsweisen Ausführungsform dargestellt. Es zeigt:

  • Fig. 1 die Maschine in einer Längsansicht,
  • Fig. 2 eine Draufsicht,
  • Fig. 3 eine Draufsicht ohne den Druckrollenkopf,
  • Fig. 4 einen Druckrollenkopf im Längsschnitt mit Support,
  • Fig. 5 den Druckrollenkopf in Vorderansicht,
  • Fig. 6 und 7 einen Rohrrohling in Ansicht und Draufsicht,
  • Fig. 8 den nach dem vorliegenden Fliessdruckverfahren hergestellte nahtlose und falzlose glatte, aus einem Stück geformte dünnwandige Blechrohrbogen in Ansicht.
The attached drawings show the machine in an exemplary embodiment. It shows:
  • 1 shows the machine in a longitudinal view,
  • 2 is a plan view,
  • 3 is a plan view without the pressure roller head,
  • 4 shows a pressure roller head in longitudinal section with support,
  • 5 the pressure roller head in front view,
  • 6 and 7 a tube blank in a view and plan view,
  • Fig. 8 shows the seamless and fold-free smooth, one-piece formed thin-walled sheet metal tube bend produced by the present flow printing process in view.

Auf einer Grundplatte 1 eines Maschinengestelles 2 ruht ein Elektromotor 3 für den Antrieb eines Druckrollenkopfes 4. Letzterer ist mit einer Hohlwelle 5 mittelst Lager 6, 7 im Maschinengestell 2 drehbar gelagert. In der Hohlwelle 5 ruht achsial verschiebbar aber nicht drehbar eine Schubstange 8, die hydraulisch, pneumatisch etc. bei 9 (Zylinder mit Kolben) betätigt wird. Am freien im Druckrollenkopf 4 vorstehenden Schubstangenende sitzt ein auswechselbarer zylindrischer Rohrkern 10, der durch einen im Durchmesser anderst dimensionierten Rbhrkern ersetzbar ist.An electric motor 3 for driving a pressure roller head 4 rests on a base plate 1 of a machine frame 2. The latter is rotatably mounted in the machine frame 2 by means of a hollow shaft 5 by means of bearings 6, 7. In the hollow shaft 5 rests axially displaceable but not rotatable, a push rod 8, which is actuated hydraulically, pneumatically etc. at 9 (cylinder with piston). At the free end of the push rod protruding in the pressure roller head 4 there is an exchangeable cylindrical tube core 10, which can be replaced by a stirring core of different dimensions.

Die Schubstange 8 wird von Führungslagern 11 geführt. Auf dem Druckrollenkopf 4 ist ein hin- und herschiebbarer Zylinder 12 aufgeschoben, mechanisch bei 13 oder auf eine andere Art und Weise steuerbar. Dieser weist einen konischen Innenmantel 14 auf, zur Steuerung von im Druckrollenkopf 4 radial zueinander verstellbaren drei Druckrollen 15 in Sternform. Letztere sind im Druckrollenkopf 4 mit Führungsachsen 16 zum Beispiel federbelastet geführt, sodass die freien Enden der Achsen 16 am Innenmantel 14 anliegen. Zur Steuerung bzw. Längverschiebung des Zylin. ders 12 auf dem Druckrollenkopf 4 können Rollen 17 auf einen Flansch 18 des Zylinders 12 durch Verschiebung derselben einwirken.The push rod 8 is guided by guide bearings 11. On the pressure roller head 4, a cylinder 12 which can be pushed back and forth is pushed on, can be mechanically controlled at 13 or in some other way. This has a conical inner jacket 14 for controlling three pressure rollers 15 in star shape which are radially adjustable in relation to one another in the pressure roller head 4. The latter are guided in the pressure roller head 4 with guide axes 16, for example spring-loaded, so that the free ends of the axes 16 rest against the inner jacket 14. For control or longitudinal displacement of the Zylin. ders 12 on the pressure roller head 4 rollers 17 can act on a flange 18 of the cylinder 12 by moving the same.

Unter dem Druckrollenkopf 4 ist auf der Grundplatte 1 ein Kreuzschlitten 19 auf Stangen 20 des Maschinengestelles 2 hin-und herschiebbar geführt, während der obere Kreuzschlittenteil 21 quer verstellbar ist. Auf dem letzteren sitzt an einer Vertikalachse 22 ein Support 23 zur Aufnahme eines auswechselbaren Rohrbogenkerns 24. Auf diesen wird wie bereits eingangs erwähnt, der zu bearbeitende dicke Rohrrohling 25 aufgeschoben. Je nach dem gewünschten Radius des Rohrbogens und Durchmesser des Rohres ist der Schwenkradius R des Supports 23 verkürzbar oder verlängerbar durch Auswechslung des entsprechenden Supports 23 und gleichzeitiger Querverstellung des Kreuzschlittenoberteils 21, was durch Querschlitze 26 in diesem ermöglicht wird. Der Support 23 wird von einem Elektromotor 27 über ein Getriebe 28 zur Ausübung einer Schwenkbewegung im Radius R des Rohrbogenkerns 24 mit dem Rohrrohling in Richtung Druckrollenkopf 4 und dessen umlaufenden Druckrollen 15 angetrieben. Der Kreuzschlitten steht mit einer von einem Zylinder 29 aus gesteuerten Stange 30 in Bewegungsverbindung, wiederum hydraulisch, pneumatisch, elektrisc oder von hand steuerbar.Under the pressure roller head 4, a cross slide 19 is guided back and forth on rods 20 of the machine frame 2 on the base plate 1, while the upper cross slide part 21 is transversely adjustable. On the latter, a support 23 is seated on a vertical axis 22 for receiving an exchangeable tube bend core 24. As already mentioned at the beginning, the thick tube blank 25 to be machined is pushed onto it. Depending on the desired radius of the pipe bend and the diameter of the pipe, the swivel radius R of the support 23 can be shortened or extended by exchanging the corresponding support 23 and at the same time adjusting the cross slide upper part 21, which is made possible by transverse slots 26 therein. The support 23 is driven by an electric motor 27 via a gear 28 for exerting a swiveling movement in the radius R of the tube bend core 24 with the tube blank in the direction of the pressure roller head 4 and its rotating pressure rollers 15. The cross slide is in movement connection with a rod 30 controlled by a cylinder 29, again hydraulically, pneumatically, electrically or by hand.

Um den dünnwandigen fertigen Rohrbogen 33 vom Rohrkern 24 abstreifen zu können, dient ein allseitig auf dem Kreuzschlitten 19 auf dessen Oberteil 21 schwenkbarerAuswurfhebel 31, der mit einem am freien Ende befindlichen Gabelstück 32 oder dergleichen den Bogenkern 24 stirnseits am einen Rohrbogenende des ausgewalzten Blechrohrbogens 33 bei 36 umfasst. Durch Ausschwingen des Auswurfhebels 31 in Richtung Rohrbogenradius ist der Rohrbogen 33 vom Rohrbogenkern 24 abziehbar, wenn der Schlitten 19, 21 mit der Stange 30, zusammen mit dem Support 23 vom Druckrollenkopf 4 weggeschoben wurde.In order to be able to strip the thin-walled finished pipe bend 33 from the pipe core 24, an ejection lever 31, which can be pivoted on all sides on the cross slide 19 on its upper part 21, is used, which has a fork piece 32 or the like located at the free end the bend core 24 comprises at one end of the pipe bend of the rolled sheet metal bend 33 at 36. By swinging out the ejection lever 31 in the direction of the pipe bend radius, the pipe bend 33 can be pulled off the pipe bend core 24 when the slide 19, 21 with the rod 30, together with the support 23, has been pushed away from the pressure roller head 4.

Wenn der Rohrbogen 33 zylindrische Rohrfortsätze 34 aufweisen soll, dann wird am Rohrbogenkern 24 stirnseitig der zylindrische Kernfortsatz 10 benötigt, der an der Schubstange 8 sitzt, welcher stirnseits als Verlängerung an den Rohrbogenkern 24 mit der Schubstange 8 vorgeschoben wird. Der zuerzielende zylindrische Rohrbogenfortsatz 34 kann je nach Wunsch gegenüber dem Rohrbogendurchmesser gleich, grösser oder kleiner sein. Es können somit die zylindrischen Rohrbogenfortsätze 34 auch weit oder eng angeformt werden. Für die zylindrische Auswalzung im Fliessdruckverfahren tritt der Zylinder 9 mit Kolben in Aktion, um die Längsverschiebung des Kreuzschlittens 19 zu bewirken, wobei der Zylinder 29 mit Kolben mitwirken kann, oder lediglich mitverschoben wird.If the pipe bend 33 is to have cylindrical pipe extensions 34, then the cylindrical core extension 10 is required at the end of the pipe bend core 24, which sits on the push rod 8, which is pushed forward as an extension on the pipe bend core 24 with the push rod 8. The cylindrical pipe bend extension 34 to be achieved can be the same, larger or smaller than the pipe bend diameter, as desired. The cylindrical pipe bend extensions 34 can thus also be molded on widely or closely. For the cylindrical rolling in the flow pressure method, the cylinder 9 with the piston comes into action in order to bring about the longitudinal displacement of the cross slide 19, the cylinder 29 being able to cooperate with the piston, or merely being displaced.

Statt die Auswechslung des Supports 23 bei verändertem Rohrbogenradius R eines herzustellenden Blech-Rohrbogens vorzunehmen, ist es auch denkbar, den Auslegearm 25 des Supports 23 verkürzbar oder verlängerbar zu konstruieren.Instead of replacing the support 23 with a changed pipe bend radius R of a sheet metal pipe bend to be produced, it is also conceivable to design the extension arm 25 of the support 23 to be shortenable or extendable.

Der nach dem Verfahren mit der Maschine aus einem Stück nahtlos und falzlos hergestellte Blech-Rohrbogen 33 (Eig. 8) weist eine absolut glatte Oberfläche auf. Er ist kaliberhaltig und formgerecht. Er kann als Verlängerung des Rohrbogens zylindrische Rohrbogenfortsätze 34 aufweisen, die gleich dem Rohrbogendurchmesser oder verengt oder ausgeweitet sein können. Die Wandstärke misst ca. 0,2 bis 1,5 mm je nach Verwendungszweck des Blechrohrbogens.The sheet metal pipe bend 33 (Eig. 8) produced seamlessly and without seams by the machine using the machine has an absolutely smooth surface. It contains caliber and conforms to shape. As an extension of the pipe bend, it can have cylindrical pipe bend extensions 34, which can be the same as the pipe bend diameter or can be narrowed or expanded. The wall thickness measures approx. 0.2 to 1.5 mm depending on the purpose of the sheet metal pipe bend.

Claims (11)

1. Verfahren zum Ausfliessdrücken von dünnwandigen näht- und falzlosen Blech-Rohrbogen von beliebigem Bogenradius, Bogenwinkel und Röhrdurchmesser aus einem kurzen und dickwandigen Rohrrohling, mit oder ohne am Rohrbogen anschliessenden zylindrische Rohrfortsätzen, dadurch gekennzeichnet, dass ein kurzer und dick. wandiger Rohrrohling auf einen die gewünschte Rohrbegenform geben den Rohrbogenkern aufgesetzt und mit diesem entsprechend dem gege benen Rohrbogenradius zwischen um den Rohrrohling kreisenden und auf diesen einwirkenden Druckrollen eines rotierenden Druckrollen kopfes bogenförmig eingeschwenkt wird, welche umlaufenden Druckrollen den Ausfliessdruck auf den einschwenkenden Rohrrohling bewirken und diesen in einen dünnwandigen Blech-Rohrbogen mit glatter Rohroberfläche auswalzen.1. Process for the outward pressing of thin-walled, seam-free and folded sheet metal pipe bends of any bend radius, bend angle and tube diameter from a short and thick-walled pipe blank, with or without cylindrical pipe extensions adjoining the pipe bend, characterized in that a short and thick. Wall pipe blank on a desired pipe bend shape put the pipe bend core and with this according to the given pipe bend radius between the pipe blank and acting on it pressure rollers of a rotating pressure roller head is swung in an arc, which rotating pressure rollers cause the outflow pressure on the swiveling tube blank and this in Roll out a thin-walled sheet metal pipe bend with a smooth pipe surface. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zur Erzielung von zylindrischen Rohrbogenfortsätzen am ausgewalzten Blech-Rohrbogen ein zylindrischer Rohrkern als Verlängerung an dl den Rohrbogen tragenden Bogenkern angesetzt wird, worauf durch Verschieben des Blech-Rohrbogens in der Achse des zylindrischen Rohrkerns in den Bereich der umlaufenden Druckrollen, die längen. mässige Auswalzung des zylindrischen Rohrbogenfortsatzes erfolgt2. The method according to claim 1, characterized in that for obtaining cylindrical pipe elbow appendages on the rolled-out sheet metal tube sheet, a cylindrical tube core as an extension of d l the tube sheet supporting arch core is prepared, followed by displacement of the sheet metal pipe bend in the axis of the cylindrical tube core in the area of the circumferential pressure rollers that length. moderate rolling out of the cylindrical pipe bend process takes place 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zur Erzielung von lediglich zylindrischen Blechrohren, dessen Rohrrohling auf einem zylindrischen Rohrkern aufgesetzt und mit diesem zwischen die umlaufenden Druckrollen bei nicht rotierende; Rohrkern axial verschoben wird. 3rd A method according to claim 1, characterized in that to achieve only cylindrical sheet metal tubes, the tube blank is placed on a cylindrical tube core and with this between the rotating pressure rollers in the case of non-rotating; Tube core is axially displaced. 4. Maschine zur Herstellung von nahtlosen und falzlosen dünnwandigen Blech-Rohrbogen mit glatter Oberfläche und beliebigem Bogenradius, Bogenwinkel und Rohrdurchmesser aus einem kurzen und dickwandigen Rohrrohling, nach dem Verfahren nach Anspruch 1 dadurch gekennzeichnet, dass auf einem mit Grundplatte (1) versehenen Maschinengestell (2) ein Druckrollenkopf (4) mit radial verstellbaren Druckrollen (15) drehbar lagert, unter welchem ein um eine vertikale Achse (22) schwenkend antreibbarer Support (23) festsitzt, der als Träger eines, einen Rohrrohling (25) aufnehmenden Rohrbogenkern (24) dient, der durch Schwenkung um den Rohrbogenradius (R) zwischen die umlaufenden Druckrollen (15) des Druckrollenkopfes (4) führbar ist, die den Rohrrohling durch Auswalzen in einen Blech-Rohrbogen verwandelt.4. Machine for producing seamless and seam-free thin-walled sheet metal pipe bends with a smooth surface and any bend radius, bend angle and pipe diameter from a short and thick-walled pipe blank, according to the method of claim 1, characterized in that on a machine frame provided with a base plate (1) ( 2) a pressure roller head (4) with radially adjustable pressure rollers (15) rotatably, under which a support (23) which can be driven to pivot about a vertical axis (22) and which serves as a support for a tube bend core (24) which receives a tube blank (25) and which is pivoted about the tube bend radius (R) between the rotating pressure rollers (15) of the Pressure roller head (4) is feasible, which transforms the tube blank by rolling it into a sheet metal tube bend. 5. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass der Support (23) gegen einen anderen Support mit verändertem bzw. kürzerem oder längerem Auslegearm (35) in Anpassung an den gewünschten Rohrbogenradius (R) auswechselbar ist.5. Machine according to claim 4, characterized in that the support (23) can be exchanged for another support with a modified or shorter or longer extension arm (35) in adaptation to the desired pipe bend radius (R). 6. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass der Support (23) einen in seiner Länge veränderlichen Auslegearm (35) besitzt.6. Machine according to claim 4, characterized in that the support (23) has a variable extension arm (35). 7. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass auf dem angetriebenen Druckrollenkopf (4) ein koaxialer Zylinder (12) axial verschiebbar gelagert ist, der mit einem hohlkonischen Innenmantel (14) versehen ist, gegen welchen Führungsbolzen (16) der Druckrollen (15) unter Ferderwirkung anliegen, welche durch axiales Verschieben des Zylinders (12) auf dem Druckrollenkopf (4) von und gegeneiander radial steuerbar sind.7. Machine according to claim 4, characterized in that on the driven pressure roller head (4) a coaxial cylinder (12) is axially displaceably mounted, which is provided with a hollow conical inner jacket (14) against which guide pin (16) of the pressure rollers (15 ) apply under spring action, which can be radially controlled by and against each other by axially displacing the cylinder (12) on the pressure roller head (4). 8. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass im Druckrollenkopf (4) und dessen Hohlwelle (5) eine nicht mitdrehbare aber längsverschiebbare Schubstange (8) lagert, die im Bereich des Druckrollenkopfes (4) einen: zylindrischen und auswechselbaren Rohrkern (10) trägt, der durch Verschieben der Schubstange (8) als Verlängerung am Bogenkern (24) stirnseits ansetzbar ist, bei gleichbleibendem, geringerem oder grösseren Durchmesser gegenüber demjenigen des Bogenkerns (24), sodass durch Längsverschiebung der Schubstange (8) am Blechrohrbogen (33) bei umlaufenden Druckrollen (15) ein zylindrischer Rohrbogenfortsatz (34) im Ausfliessdruckverfahren auswalzbar ist.8. Machine according to claim 4, characterized in that in the pressure roller head (4) and its hollow shaft (5) supports a non-rotatable but longitudinally displaceable push rod (8) which in the region of the pressure roller head (4) has a: cylindrical and exchangeable tube core (10) which can be attached as an extension to the bend core (24) at the end by moving the push rod (8), with the same, smaller or larger diameter compared to that of the bend core (24), so that by longitudinal displacement of the push rod (8) on the sheet metal tube bend (33) circumferential pressure rollers (15) a cylindrical pipe bend extension (34) can be rolled out in the outflow printing process. 9. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass der den Bogenkern (24) tragende Support (23) um die Vertikalachse (22) mittels Elektromotor (27) über ein Getriebe (28) steuer- bzw. schwenkbar ist, welche Teile sich auf dem oberen quer verstellbaren Kreuzschlittenteil (21) befinden.9. Machine according to claim 4, characterized in that the support (23) supporting the arc core (24) about the vertical axis (22) by means of an electric motor (27) via a gear (28) is controllable or pivotable, which parts are on the upper cross-adjustable cross slide part (21). 10. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass die Schwenkachse (22) des Supports (23) in bezug zur Rotationsachse des Druckrollenkopfes (4) mit Hilfe des Kreuzschlittens (19, 21) längenmässig veränderbar ist.10. Machine according to claim 4, characterized in that the pivot axis (22) of the support (23) with respect to the axis of rotation of the pressure roller head (4) with the help of the cross slide (19, 21) can be changed in length. 11. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass ein allseitig ausschwenkbarer Auswurfhebel (31) auf dem Kreuzschlitten. oberteil (21) angeordnet ist, dessen freies oberes Ende (32) stirnseits am ausgewalzten Blech-Rohrbogen (33) angesetzt, letzterer vom Bogenkern (24) bei ausfahrendem Blechrohrbogen aus dem Druckrollenkopf (4) abstreifbar ist.11. Machine according to claim 4, characterized in that an ejection lever (31) which can be swung out on all sides on the cross slide. The upper part (21) is arranged, the free upper end (32) of which is attached to the end of the rolled-out sheet metal tube bend (33), the latter being stripped from the bend core (24) when the sheet metal tube bend extends out of the pressure roller head (4).
EP79810071A 1978-10-11 1979-08-21 Method and machine for spin forming thin-walled seamless tubular elbows Expired EP0010057B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH10534/78 1978-10-11
CH1053478A CH634238A5 (en) 1978-10-11 1978-10-11 METHOD AND MACHINE FOR FLOW PRESSING A THIN-WALLED SEAMLESS AND FOLDLESS SHEET PIPE SHEET FROM A SHORT AND THICK-WALLED PIPE SHEET BLANK.

Publications (2)

Publication Number Publication Date
EP0010057A1 true EP0010057A1 (en) 1980-04-16
EP0010057B1 EP0010057B1 (en) 1983-01-19

Family

ID=4364244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79810071A Expired EP0010057B1 (en) 1978-10-11 1979-08-21 Method and machine for spin forming thin-walled seamless tubular elbows

Country Status (14)

Country Link
EP (1) EP0010057B1 (en)
CA (1) CA1123381A (en)
CH (1) CH634238A5 (en)
CS (1) CS216685B2 (en)
DD (1) DD146402A5 (en)
DE (1) DE2964544D1 (en)
ES (1) ES484879A1 (en)
FI (1) FI792882A (en)
HU (1) HU178179B (en)
IE (1) IE49621B1 (en)
NO (1) NO148665C (en)
PL (1) PL218848A1 (en)
PT (1) PT70295A (en)
YU (1) YU231279A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314936A2 (en) * 1987-10-09 1989-05-10 BLM S.p.A. Method and apparatus for plastic forming of tubular articles
US5979202A (en) * 1997-05-29 1999-11-09 Blakeley Engineering Ltd. Method and apparatus for making pipe line steel grooved-end fittings
US7316142B2 (en) 2004-05-21 2008-01-08 Lancaster Paul B Metal spin forming head

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989435A (en) * 1989-12-11 1991-02-05 Kabushiki Kaisha Asahi Kinzoku Hogyosho Method and apparatus for manufacturing curved pipe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137864A (en) * 1935-09-28 1938-11-22 Taylor James Hall Method of making pipe fittings
US2560822A (en) * 1945-11-08 1951-07-17 Walton S Robinson Means and method for making seamless pipe elbows
US3340713A (en) * 1965-02-11 1967-09-12 James E Webb Spin forming tubular elbows
FR1540166A (en) * 1967-10-09 1968-09-20 Zentrale Entwicklung Konstrukt Device for pressing parts stretched in length with symmetry of revolution
DE1289017B (en) * 1963-10-03 1969-02-13 Lodge And Shipley Company Centrifugal force absorption of a radially adjustable carrier for a pressure tool during operation
DE2714782A1 (en) * 1977-04-02 1978-10-05 Bertrams Ag Bender for thin-wall pipes - has mandrel built up from discs to fit in bend during external working by rollers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137864A (en) * 1935-09-28 1938-11-22 Taylor James Hall Method of making pipe fittings
US2560822A (en) * 1945-11-08 1951-07-17 Walton S Robinson Means and method for making seamless pipe elbows
DE1289017B (en) * 1963-10-03 1969-02-13 Lodge And Shipley Company Centrifugal force absorption of a radially adjustable carrier for a pressure tool during operation
US3340713A (en) * 1965-02-11 1967-09-12 James E Webb Spin forming tubular elbows
FR1540166A (en) * 1967-10-09 1968-09-20 Zentrale Entwicklung Konstrukt Device for pressing parts stretched in length with symmetry of revolution
DE2714782A1 (en) * 1977-04-02 1978-10-05 Bertrams Ag Bender for thin-wall pipes - has mandrel built up from discs to fit in bend during external working by rollers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0314936A2 (en) * 1987-10-09 1989-05-10 BLM S.p.A. Method and apparatus for plastic forming of tubular articles
EP0314936A3 (en) * 1987-10-09 1990-07-11 Blm S.P.A. Method and apparatus for plastic forming of tubular articles
US5979202A (en) * 1997-05-29 1999-11-09 Blakeley Engineering Ltd. Method and apparatus for making pipe line steel grooved-end fittings
US7316142B2 (en) 2004-05-21 2008-01-08 Lancaster Paul B Metal spin forming head

Also Published As

Publication number Publication date
PL218848A1 (en) 1980-06-16
NO148665C (en) 1983-11-23
NO148665B (en) 1983-08-15
PT70295A (en) 1979-11-01
FI792882A (en) 1980-04-12
ES484879A1 (en) 1980-04-01
IE49621B1 (en) 1985-11-13
CH634238A5 (en) 1983-01-31
HU178179B (en) 1982-03-28
DD146402A5 (en) 1981-02-11
DE2964544D1 (en) 1983-02-24
CS216685B2 (en) 1982-11-26
YU231279A (en) 1984-04-30
EP0010057B1 (en) 1983-01-19
NO793232L (en) 1980-04-14
CA1123381A (en) 1982-05-11
IE791923L (en) 1980-04-11

Similar Documents

Publication Publication Date Title
DE10316854A1 (en) Method and device for deforming a workpiece from a material with exponential stress-strain behavior into a thin-walled, hollow shell
DE2458233C3 (en) Device for the manufacture of glasses by the cooling lathing process
DE4313648C2 (en) Method and device for producing seamless tubes by pressure rolling
EP0010057A1 (en) Method and machine for spin forming thin-walled seamless tubular elbows
EP0344570B1 (en) Method and apparatus for making a spiral tubing
DE2922692A1 (en) METHOD FOR PRODUCING ROTATIONALLY SYMMETRICAL METAL HOLLOW BODIES BY FLOW PRESSURE
AT360312B (en) METHOD FOR OUTFLOWING PRESSURE OF SINGLE-WALLED AND SEAMLESS SHEET-TUBE ELBOWS OF ANY ELBOW RADIUS, ELBOW ANGLE AND PIPE DIAMETER FROM A SHORT AND THICK-WALLED PIPE PIPE, WITH OR WITHOUT THE PIPE FITTING, PIPE FITTING, PIPE FITTING
WO1980000667A1 (en) Method for producing by repousse work of a metal sheet bent pipe,with a thin wall and without a joint bead,specific radius of curvature,opening angle and pipe diameter,with or without terminal cylindrical ends,from a thick wall tubular blank,and machine for implementing such method
WO2016142162A1 (en) Method and coating device for applying a cladding layer during the production of a multilayer heavy-duty pipe
DE19732146B4 (en) Method and device for producing annular components with a wedge-shaped inner profile
DE169853C (en)
DE3020795C2 (en) Device for producing conical inner surfaces or conical outer surfaces on a curved tubular continuous casting mold
DE2924461C2 (en) Device for the production of pipe elbows
DE634385C (en) Pilgrim's step rolling mill
DE232512C (en)
EP3436205A1 (en) Cold pilger rolling mill and method for producing a pipe
DE16255C (en) Apparatus and methods for welding short pipe ends together
DE560211C (en) Device for moving the mandrel bar and the workpiece in pilgrim step rolling mills
AT293143B (en) Method and device for producing bent tubes with bending zones with a small radius of curvature
DE2310886A1 (en) DEVICE FOR THE MANUFACTURING OF WAVE GUIDES
DE17706C (en) Rolling mill for the production of rings without seams for steam boilers and the like
DE617270C (en) Machine for flanging and beading the coats of tin vessels
DE1527450A1 (en) Rolling method and device for bending large diameter pipes
DE36178C (en) Method and apparatus for rolling tubes and other hollow cylindrical objects
DE1935100B2 (en) Process for pipe bending and equipment for carrying out the process

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed
AK Designated contracting states

Designated state(s): BE DE FR GB LU NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE FR GB LU NL SE

ET Fr: translation filed
REF Corresponds to:

Ref document number: 2964544

Country of ref document: DE

Date of ref document: 19830224

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19830808

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19830831

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19840930

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19860831

Year of fee payment: 8

BERE Be: lapsed

Owner name: BLASER HEINZ

Effective date: 19870831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19880301

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881118

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19890621

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19900822

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920817

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920820

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940429

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940503

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 79810071.5

Effective date: 19910410

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT