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WO1980000667A1 - 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 - Google Patents

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 Download PDF

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Publication number
WO1980000667A1
WO1980000667A1 PCT/CH1979/000116 CH7900116W WO8000667A1 WO 1980000667 A1 WO1980000667 A1 WO 1980000667A1 CH 7900116 W CH7900116 W CH 7900116W WO 8000667 A1 WO8000667 A1 WO 8000667A1
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WO
WIPO (PCT)
Prior art keywords
pipe
bend
core
sheet metal
tube
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.)
Ceased
Application number
PCT/CH1979/000116
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German (de)
French (fr)
Inventor
H Blaser
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Individual
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Individual
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Filing date
Publication date
Priority claimed from CH1054378A external-priority patent/CH633928A5/en
Application filed by Individual filed Critical Individual
Publication of WO1980000667A1 publication Critical patent/WO1980000667A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—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 remedy the above disadvantages by means of a method which relates to the outward pressing of thin-walled seamless and rebate-free sheet metal pipe bends of any bend radius, bend angle, pipe diameter from a short and thick-walled pipe blank, provided that the caliber and exact shape are used, with absolutely smoothness Surface of the elbow.
  • 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 and short pipe blank 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 giving the desired tube bend shape and is pivoted with this in accordance with the given tube bend radius between pressure rollers of a rotating pressure roller head, which rotate around the tube blank and act on them, which rotating pressure rollers pivot the outflow pressure onto the pivoting one Effect pipe blank and roll it into a thin-walled sheet metal pipe bend with a smooth pipe surface.
  • the pressure rollers are adjusted radially towards one another in order to exert the flow pressure on the sheet metal tube 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 more, and of any bend radius, bend angle and pipe diameter, with an absolutely smooth pipe bend surface and precise caliber maintenance and exact shaping from a single piece any seam or fold.
  • a cylindrical pipe core is attached to the front of the bend core supporting the pipe bend as a core extension, whereupon the cylindrical outflow pressing is carried out 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.
  • a machine is used to carry out the process, which rotatably supports a motor-driven pressure roller head with pressure rollers that can be moved or controlled radially from and against one another in a machine frame, under which a cross slide that can be moved and displaced is located on a base plate. The latter rests on a support which can be pivoted about a vertical pivot axis as the carrier of an exchangeable tube bend core which accommodates 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.
  • FIG. 1 shows the machine in a longitudinal view
  • FIG. 2 shows a plan view
  • FIG. 3 shows a top view without the pressure roller head
  • FIG. 4 shows a pressure roller head in longitudinal section with support
  • FIG. 5 shows the pressure roller head in front view
  • FIGS. 6 and 7 show a tube blank in a view and top view
  • FIG. 8 shows the seam produced according to the present flow printing method and fold-free, smooth, one-piece thin-walled sheet metal pipe bend in view.
  • An electric motor 3 for driving a pressure groove head 4 rests on a base plate 1 of a machine frame 2.
  • the latter is rotatably mounted with a hollow shaft 5 by means of bearings 6, 7 in the machine frame 2.
  • a hollow shaft 5 In the hollow shaft 5 there is an axially displaceable but not rotatable push rod 8 which is actuated hydraulically, pneumatically etc. at 9 (cylinder with piston).
  • actuated hydraulically, pneumatically etc. at 9 cylinder with piston
  • Push rod end sits an interchangeable cylindrical
  • Tube core 10 which can be replaced by a tube core with a different dimension in diameter.
  • the push rod 8 is guided by guide bearings 11.
  • a cylinder 12 which can be pushed back and forth is pushed on, mechanically controllable at 13 or in another way.
  • This has a conical inner jacket 14 for controlling three pressure rollers 15 in a star shape that are radially adjustable in relation to one another in the pressure roller head 4.
  • the latter are guided, for example, in a spring-loaded manner in the pressure roller head 4 with a guide axis 16, so that the free ends of the axes 16 abut the inner casing 14.
  • rollers 17 can act on a flange 18 of the cylinder 12 by its displacement.
  • a cross chute 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 tubular and thick tube blank 25 to be machined is pushed onto it.
  • the desired radius of the pipe bend and the diameter of the pipe the
  • the pivot axis R of the support 23 can be shortened or lengthened by exchanging the corresponding support 23 and simultaneously 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 exercising a pivoting movement in the radius R.desi 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 pour communicates with a controllable by a cylinder 29 of driven shaft 30 in motion connection, in turn, hydraulically or pneumatically, electrically or by H and.
  • an ejection lever 31 which can be pivoted on all sides on the cross slide 19 on its upper part, serves the end of the bend core 24 with a fork piece 32 or the like located at the free end comprises a pipe bend end of the rolled sheet metal pipe bend 33 at 36.
  • the cylindrical core extension 10 is required on the end of the pipe bend core 24, which sits on the push rod 8, which is pushed forward as an extension to 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. It can thus also be shaped widely or narrowly into the cylindrical tube arch extensions 34.
  • 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.
  • the sheet metal pipe bend 33 (FIG. 8) which is 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 or more depending on the purpose of the sheet metal pipe bend.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

Method and machine for implementing such method for producing by repoussé work a sheet metal elbow pipe having a thin wall, with no welding bead and no bending line, with specific radius of curvature, angle of opening and diameter of the pipe, from a thick wall short tubular blank. The blank (25) is positioned on an arcuated core (24) corresponding to the desired radius of curvature, between the press rollers (15) mutually adjustable and radially arranged on a head (4). The core (24) pivots according to the desired radius of the arc without rotating on itself, to allow the lamination of the blank (25) by rotation of the rollers (15) about the piece to be machined to form the angle of bent pipe (33) to the desired length, with a thickness of the wall comprised between 0.2 and 1.5 mm approximately.

Description

Verfahren zum Ausfliessdrücken von dünnwandigen und nahtlosen Blech-Rohrbogen von beliebigem Bogenradius, Rohrbogenwinkel und Rohrdurchmesser aus einem dickwandigen Rohrrohling, mit oder ohne am Rohrbogen anschliessenden zylindrischen Rohrfortsätzen, und Maschine zur Durchführung des Verfahrens.Process for outflowing thin-walled and seamless sheet metal pipe bends of any bend radius, pipe bend angle and pipe diameter from a thick-walled pipe blank, with or without cylindrical pipe extensions connected to the pipe bend, and machine for carrying out the process.

Bis zur Zeit bestand keine Möglichkeit, dünnwandige Blechrohrbogen naht- und faltlos in einem Stück zu verformen. Alle dickwandigen gezogenen Rohrbogen haben den Nachteil, dass sie im Rohrbereich sich im Kaliber verändern, hervorgerufen durch Stauchungen auf der Rohrbogenaussenseite. 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 forming thin-walled sheet metal elbows in one piece without seams and folds. All thick-walled drawn pipe elbows have the disadvantage that they change in caliber in the pipe area, caused by compression on the outside of the pipe elbow. 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, welded or seamed together. 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 naht- und falzlosen Blechrohrbogen von beliebigem Bogenradius, Bogenwinkel, Rohrdurchmesser aus einem kurzen und dickwandigen Rohrrohling bezieht, bei Einhaltung des Kaliebers und exakter Formgebung, bei absolut glatter Oberfläche des Rohrbogens. Derdünnwandige Rohrbogenkann mit oder ohne zylindrische Rohrfortsätze hergestellt werden, aus Eisen, Kupfer, Messing, Aluminium, Zink u.s.w. Die im Ausfliessdruckverfahren aus einem dickwandigen und kurzen Rohrrohling hergestellten Blech-Rohrbogen können eine Wandstärke von 0,2 - 1,5: mm und mehr aufweisen,The present invention seeks to remedy the above disadvantages by means of a method which relates to the outward pressing of thin-walled seamless and rebate-free sheet metal pipe bends of any bend radius, bend angle, pipe diameter from a short and thick-walled pipe blank, provided that the caliber and exact shape are used, with absolutely smoothness Surface of the elbow. 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 and short pipe blank 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 Rohrbogenfoπa 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 Druckrollen den Ausfliessdruck auf den einschwenkenden Rohrrohling bewirken und diesen in einen dünnwandigen Blechrohrbogen mit glätter Rohroberfläche auswalzen.According to the present method, a short and thick-walled tube blank is placed on a tube bend core giving the desired tube bend shape and is pivoted with this in accordance with the given tube bend radius between pressure rollers of a rotating pressure roller head, which rotate around the tube blank and act on them, which rotating pressure rollers pivot the outflow pressure onto the pivoting one Effect pipe blank and roll it into a thin-walled sheet metal pipe bend with a smooth pipe surface.

Während dem Einschwenkvorgang werden die Druckrollen zur Ausübung des Fliessdruckes auf den zu bildenden Blechrohrbogen radial aufeinander zulaufend nachgestellt. Der Rohrrohling kann auf diese Weise in einen Blechrohrbogen von ca. 0,2 bis 1,5 mm und mehr Wandstärke umgewandelt werden, und zwar von beliebigem Bogenradius, Bogenwinkel und Rohrdurchmesser, bei absolut glatter Rohrbogenoberflache und genauer Kaliberhaltung und exakter Formgebung aus einem Stück ohne jegliche Naht bzw. Falz.During the pivoting-in process, the pressure rollers are adjusted radially towards one another in order to exert the flow pressure on the sheet metal tube 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 more, and of any bend radius, bend angle and pipe diameter, with an absolutely smooth pipe bend surface and precise caliber maintenance and exact shaping from a single piece any seam or fold.

Zur Erzielung von zylindrischen Rohrbogenfortsätzen am bereits ausgewalzten Blechrohrbogen wird ein zylindrischer Rohrkern an den den Rohrbogen tragenden Bogenkern stirnseits als Kernverlängerung angesetzt, worauf das zylindrische Ausfliessdrücken durch Verschieben eines Supports parallel zur Achse des Druckrollenkopfes erfolgt.In order to achieve cylindrical pipe bend extensions on the sheet metal pipe bend that has already been rolled out, a cylindrical pipe core is attached to the front of the bend core supporting the pipe bend as a core extension, whereupon the cylindrical outflow pressing is carried out by moving a support parallel to the axis of the pressure roller head.

Gemäss dem Verfahren ist es auch möglich, dickwandige Rohre 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. Zur Dμrchführung des Verfahrend dient eine Maschine, die in einem Maschinengestell einen motorisch angetriebenen Druckrollenkopf mit radial von und gegeneinander verschiebbaren bzw. steuerbaren Druckrollen drehbar lagert, unter welchem sich auf einer Grundplatte eine lämgs- und querverschiebbarer Kreuzschlitten befindet. Auf letzterem ruht um eine vertikale Schwenkachse schwenkbarer Support als Träger eines auswechselbaren, den Rohrbogenrohling aufnehmenden Rohrbogenkem, welcher den Rohrbogenradius einhaltend, zwischen die umlaufenden Druckrollen bogenförmig in den Druckrollenkopf einschwenkbar ist.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. A machine is used to carry out the process, which rotatably supports a motor-driven pressure roller head with pressure rollers that can be moved or controlled radially from and against one another in a machine frame, under which a cross slide that can be moved and displaced is located on a base plate. The latter rests on a support which can be pivoted about a vertical pivot axis as the carrier of an exchangeable tube bend core which accommodates 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 beiliegenden Zeichnung ist die Maschine in einer beispielsweisen Ausführungsform dargestellt. Es zeigt: Fig. 1 die Maschine in einer Längsansicht, Fig. 2 eine Draufsicht,In the accompanying drawing, the machine is shown in an exemplary embodiment. 1 shows the machine in a longitudinal view, FIG. 2 shows a plan view,

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 zeigen einen Rohrrohling in Ansicht und Draufsicht, Fig. 8 den nach dem vorliegenden Fliessdruckverfahren hergestellten naht- und falzlosen, glatten, aus einem Stück geformte dünnwandige Blechrohrbogen in Ansicht.3 shows a top view without the pressure roller head, FIG. 4 shows a pressure roller head in longitudinal section with support, FIG. 5 shows the pressure roller head in front view, FIGS. 6 and 7 show a tube blank in a view and top view, FIG. 8 shows the seam produced according to the present flow printing method and fold-free, smooth, one-piece thin-walled sheet metal pipe bend in view.

Auf einer Grundplatte 1 eines Maschinengestelles 2 ruht ein Elektromotor 3 für den Antrieb eines Druckrillenkopfes 4 Letzterer ist mit einer Hohlwelle 5 mittelst Lager 6, 7 im Maschinengestell 2 drehbar gelagert. In der Hohiwelle 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 vorstehendenAn electric motor 3 for driving a pressure groove head 4 rests on a base plate 1 of a machine frame 2. The latter is rotatably mounted with a hollow shaft 5 by means of bearings 6, 7 in the machine frame 2. In the hollow shaft 5 there is an axially displaceable but not rotatable push rod 8 which is actuated hydraulically, pneumatically etc. at 9 (cylinder with piston). At the free in the pressure roller head 4 protruding

Schubstangenende sitzt ein auswechselbarer zylindrischerPush rod end sits an interchangeable cylindrical

Rohrkern 10, der durch einen im Durchmesser änderst dimensionierten Rohrkern ersetzbar ist. 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 Führungsachse 16 zum Beispiel federbelastet geführt, sodass die freien Enden der Achsen 16 am Innenmantel 14 anliegen. Zur Steuerung bzw. Längsverschiebung des Zylinders 12 auf dem Druckrollenkopf 4 können Rollen 17 auf einen Flansch 18 des Zylinders 12 durch dessen Verschiebung einwirken.Tube core 10, which can be replaced by a tube core with a different dimension in diameter. The push rod 8 is guided by guide bearings 11. On the print roller head 4 a cylinder 12 which can be pushed back and forth is pushed on, mechanically controllable at 13 or in another way. This has a conical inner jacket 14 for controlling three pressure rollers 15 in a star shape that are radially adjustable in relation to one another in the pressure roller head 4. The latter are guided, for example, in a spring-loaded manner in the pressure roller head 4 with a guide axis 16, so that the free ends of the axes 16 abut the inner casing 14. For control or longitudinal displacement of the cylinder 12 on the pressure roller head 4, rollers 17 can act on a flange 18 of the cylinder 12 by its displacement.

Unter dem Druckrollenkopf 4 ist auf der Grundplatte 1 ein Kreuzschütten 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 kubze und dicke Rohrrohling 25 aufgeschoben. Je nach dem gewünschten Radius des Rohrbogens und Durchmesser des Rohres ist dieUnder the pressure roller head 4, a cross chute 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 tubular and 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

Schwenkachse R des Supports 23 verkürzbar oder verlängerbar durch Auswechseln des entsprechenden Supports 23 und gleichzeitiger Querverstellung des Kreuzschlittenoberteils 21, was durch Querschlitze 26 in diesem ermöglichst wird. Der Support 23 wird von einem Elektromotor 27 über ein Getriebe 28 zur Ausübung einer Schwenkbewegung im Radius R.desi-Rohrbogen kerns 24 mit dem Rohrrohling in Richtung Druckrollenkopf 4 und dessen umlaufenden Druckrollen 15 angetrieben. Der Kreuz schütten steht mit einer von einem Zylinder 29 aus gesteuerten Stange 30 in Bewegungsverbindung, wiederum hydraulisch oder pneumatisch, elektrisch oder von Hand steuerbar.The pivot axis R of the support 23 can be shortened or lengthened by exchanging the corresponding support 23 and simultaneously 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 exercising a pivoting movement in the radius R.desi 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 pour communicates with a controllable by a cylinder 29 of driven shaft 30 in motion connection, in turn, hydraulically or pneumatically, electrically or by H and.

Um den dünnwandigen fertigen Rohrbogen 33 vom Rohrkern 24 abstreifen zu können, dient ein allseitig auf dem Kreuzschlitten 19 auf dessen Oberteil 21 schwenkbarer Auswurf¬kebel 31, der mit einem am freien Ende befindlichen Gabelstück 32 oder dergleichen den Bogenkern 24 stirnseits am einen Rohrbogenende des ausgewaltzen Blechrohrbogens 33 bei 36 umfasst. Durch Ausschwingen des Auswurfhebeis 31 in Richtung Rohrbogenradius ist der Blechrohrbogen 33 vom Rohrbogenkem 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, serves the end of the bend core 24 with a fork piece 32 or the like located at the free end comprises a pipe bend end of the rolled sheet metal pipe bend 33 at 36. By swinging out the ejection lever 31 in the direction of the pipe bend radius, the sheet metal 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 Rohrbogenkem 24 stirnseits der zylindrische Kernfortsatz 10 benötigt,der an der Schübstange 8 sitzt, welcher stirnseits als Verlängerung an den Rohrbogenkem 24 mit der Schubstange 8 vorgeschoben wird. Der zu erzielende zylindrische Rohrbogenfortsatz 34 kann je nach Wunsch gegenüber dem Rohrbogendurchmesser gleich, grösser oder kleiner sein. Es können soψit 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. Statt die Auswechslung des Supports 23 bei verändertem Rohrbogenradius R eines herzustellenden Blech-Rohrbogens vorzunehmen, ist es auch denkbar, den Auslegearm 25 des Suppoicts 24 verkürzbar oder verlängerbar zu konstruieren. Der nach dem Verfahren mit der Maschine aus einem Stück naht- und falzlos hergestellte Blech-Rohrbogen 33 (Fig. 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 oder mehr je nach Verwendungszweck des Blech-Rohrbogens. If the pipe bend 33 is to have cylindrical pipe extensions 34, then the cylindrical core extension 10 is required on the end of the pipe bend core 24, which sits on the push rod 8, which is pushed forward as an extension to 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. It can thus also be shaped widely or narrowly into the cylindrical tube arch extensions 34. For the cylindrical rolling in the flow pressure process, 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. 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 construct the extension arm 25 of the support 24 so that it can be shortened or extended. The sheet metal pipe bend 33 (FIG. 8) which is 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 or more depending on the purpose of the sheet metal pipe bend.

Claims

Patentansprüche Claims 1. Verfahren zum Ausfliessdrücken von dünnwandigen nahtund fälzlosen Blech-Rohrbogen von beliebigem Bogenradius, Bogenwinkel und Rohrdurchmesser aus einem kurzen und dickwandigen Rohrrohling, mit oder ohne am Rohrbogen anschliessenden zylindrischen Rohrfortsätzen, dadurch gekennzeichnet, dass ein kurzer und dickwandiger Rohrrohling auf einen die gewünschte Rohrbogenform gebenden Rohrbogenkem aufgesetzt und mit diesem entsprechend dem gegebenen Rohrbogenradius zwischen um den Rohrrohling kreisenden und auf diesen einwirkenden Druckrollen eines rotierenden Druckrollenkopfes 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.Procedure for the outward pressing of thin-walled seamless and seamless sheet metal pipe bends of any bend radius, bend angle and pipe 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-walled pipe blank gives the desired pipe bend shape Pipe bend core is placed and swung in with this in accordance with the given pipe bend radius between the pressure rolls of a rotating pressure roll head, which rotate around and act on the pipe blank, which rotating pressure rolls cause the outflow pressure on the swiveling pipe blank and roll it into a thin-walled sheet metal pipe bend with a smooth pipe surface. 2. Verfahren nach Absprach 1, dadurch gekennzeichnet, dass zur Eraieiung von zylindrischen Rohrfortsätzen am ausgewalzten Blech-Rohrbogen ein zylindrischer Rohrkern als Verlängerung den den des Rohrbogen tragenden Bogenkern angesetzt wird, worauf durch Verschieben des Blech-Rohrbogens in der Achse des zylindrischen Rohrkerns in den Bereich der umlaufenden Druckrollen, die längenmässige Auswalzung des zylindrischen Rohrbogenfortsatzes erfolgt.2. The method according to Agreement 1, characterized in that a cylindrical tube core is attached as an extension to the arc core carrying the tube elbow for the extension of cylindrical tube extensions on the rolled sheet metal tube elbow, whereupon by moving the sheet metal tube elbow in the axis of the cylindrical tube core in the Area of the circumferential pressure rollers, the lengthwise rolling out of the cylindrical tube arch extension takes place. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass zur Erzielung von lediglich zylindrischen Blechrohren, dessen Rohrrohling auf einen zylindrischen Rohrkern aufgesetzt und mit diesem zwischen die umlaufenden Druckrollen bei nicht rotierendem Rohrkern axial verschoben wird.3. The method according to claim 1, characterized in that in order to achieve only cylindrical sheet metal tubes, the tube blank is placed on a cylindrical tube core and is axially displaced therewith between the rotating pressure rollers when the tube core is not rotating. 4.. Maschine zur Herstellung von naht- 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 Rohrbogenkem (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 the production of seamless and seam-free thin-walled sheet metal pipe bend 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 with base plate (1) provided machine frame (2) a pressure roller head (4) with radially adjustable pressure rollers (15) rotatably mounted, under which a support (23), which can be driven to pivot about a vertical axis (22), is stuck, which serves as a support for a pipe bend core (24) receiving a pipe blank (25), which is pivoted by the pipe bend radius (R) between the rotating ones Pressure rollers (15) of the pressure roller head (4) can be guided, which converts the tube blank into a sheet metal tube bend by rolling it out. 5. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass der Support (23) gegen einen anderen Support mit veränderrtem bzw. kürzeren 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) against another support with a modified or shorter or longer extension arm (35). can be exchanged in accordance with 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) in length. 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 Federwirkung anliegen, welche Druckrollen durch axiales Verschieben des Zylinders (12) auf dem Druckrollenkopf (4) von und gegeneinander 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 ) under spring action which pressure rollers can be controlled radially from 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 Bogenkera (24) stinrseits ansetzbar ist, bei gleichbleibendem, geringerem oder grösseren Durchmesser gegenüber demjenigen des Bogenkerns (24), sodass durch Längsverschiebung der8. 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 carries a cylindrical and replaceable tube core (10) in the region of the pressure roller head (4) , which can be attached by pushing the push rod (8) as an extension on the bow core (24) on the inside, with the same, smaller or larger diameter compared to that of the bow core (24), so that by longitudinal displacement of the Schubstange (8) am Blechrohrbogen (33) bei umlaufenden Druckrollen. (15) ein zylindrischer Rohrbogenfortsatz (34) imPush rod (8) on the sheet metal tube bend (33) with rotating pressure rollers. (15) a cylindrical elbow extension (34) in Ausfliessdruckverfahren auswalzbar ist. Outflow printing process can be rolled out. 9. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass der den Bogenkern (24) tragende Support (23) um die Vertikalachse (22) mittelst Elektromotor (27) über ein Getriebe (28) Steuer- bzw. schwenkbar ist, welche Teile sich auf dem oberen querverstellbaren Kreuzschlitzenteil (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 gearbox (28) is controllable or pivotable as to which parts are on the upper cross adjustable cross slot part (21). 10. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass die Schwenkachse (22) des Supports (23) in bezug zur Rotationsachse des Druckrollehkopfes (4) mit Hilfe des Kreuzschlittens (19, 21) längenmässug 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) is variable in length. 11. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass ein allseitig ausschwenkbarer Auswurfhebel (31) auf dem Kreuzschlittenoberteil (21) angeordnet ist, dessen freies Ende (32) stirnseits am ausgewalzten Blech-Rohrbogen (33) angesetzt, letzteren vom Bogenkern (24) bei ausfahrendem Blech-Rohrbogen 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 is arranged on the cross slide upper part (21), the free end (32) of which is attached to the rolled-out sheet metal tube bend (33), the latter from the bend core (24) can be stripped from the pressure roller head (4) when the sheet metal tube bend extends.
PCT/CH1979/000116 1978-10-11 1979-09-03 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 Ceased WO1980000667A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH10543/78 1978-10-11
CH1054378A CH633928A5 (en) 1977-11-03 1978-10-11 ADJUSTABLE HEATING DEVICE FOR THE EXPANSION MEDIUM IN HEAT CONTROL DEVICES.

Publications (1)

Publication Number Publication Date
WO1980000667A1 true WO1980000667A1 (en) 1980-04-17

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PCT/CH1979/000116 Ceased WO1980000667A1 (en) 1978-10-11 1979-09-03 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

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104028607A (en) * 2014-06-06 2014-09-10 中国航天科技集团公司长征机械厂 Machining method for improving finish product quality of spinning thickness-reduced pipe
CN104607520A (en) * 2015-01-16 2015-05-13 西北工业大学 Spinning mechanism and method for forming corrugated 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104028607A (en) * 2014-06-06 2014-09-10 中国航天科技集团公司长征机械厂 Machining method for improving finish product quality of spinning thickness-reduced pipe
CN104607520A (en) * 2015-01-16 2015-05-13 西北工业大学 Spinning mechanism and method for forming corrugated pipe

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