EP0792702B1 - Device for forming flanged collars in workpieces - Google Patents

Device for forming flanged collars in workpieces Download PDF

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Publication number
EP0792702B1
EP0792702B1 EP97103051A EP97103051A EP0792702B1 EP 0792702 B1 EP0792702 B1 EP 0792702B1 EP 97103051 A EP97103051 A EP 97103051A EP 97103051 A EP97103051 A EP 97103051A EP 0792702 B1 EP0792702 B1 EP 0792702B1
Authority
EP
European Patent Office
Prior art keywords
plunger
locking
stamp
block
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97103051A
Other languages
German (de)
French (fr)
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EP0792702A3 (en
EP0792702A2 (en
Inventor
Manfred Scholte
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.)
Witulski Kathrin
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Witulski Kathrin
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Filing date
Publication date
Application filed by Witulski Kathrin filed Critical Witulski Kathrin
Publication of EP0792702A2 publication Critical patent/EP0792702A2/en
Publication of EP0792702A3 publication Critical patent/EP0792702A3/en
Application granted granted Critical
Publication of EP0792702B1 publication Critical patent/EP0792702B1/en
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Classifications

    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of 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
    • 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
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • B21C37/292—Forming collars by drawing or pushing a rigid forming tool through an opening in the tube wall
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/49442—T-shaped fitting making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49428—Gas and water specific plumbing component making
    • Y10T29/49446—Ferrule making or reforming

Definitions

  • the invention relates to a device for production of neckings in workpieces, in particular in pipes or for pipe branches.
  • FR-A-2245431 is a mandrel for necking known from pipes, the body of which in his Outside diameter of the size of the neck to be necked in the pipe corresponds.
  • the drag area of the essentially cylindrical mandrel is in the middle Area formed as part of a cylindrical surface, whose surface lines in the pulling position parallel run to the longitudinal axis of an elongated hole in the tube. The remaining part of the drawing surface is opposite to the cylinder surface reset.
  • Another one Embodiment of the mandrel is the drawing surface from two intersecting cylinder jacket surfaces, see above that four symmetrical sectors arise.
  • the essential The disadvantage of the known mandrel is that that the mandrel does not attack the workpiece done evenly over the entire drawing area, so that only an uneven deformation is achieved and there is a risk of cracking.
  • the object of the present invention is therein a novel device for the production of Specify neckings in workpieces that are simple and works reliably.
  • the drawing shows a device 2 for production of neckings in pipes with a base plate 4, on the a first frame 6 fixed and a second, designed as a slide Frame 8 slidably arranged (see arrow 9) are, cf. Fig. 1.
  • a first plate 10 preferably circular plate, rotatably arranged on of several cylindrical bowl-shaped outer forms on a circle 12 different sizes are arranged, cf. Fig. 2.
  • a second plate 14 preferably circular plate, rotatably arranged on which on a Circle several cylindrical, the outer shapes 12 assigned Inner molds 16 are arranged, whose outer diameter is smaller than the inside diameter of the outer molds.
  • the outer shapes 12 and inner shapes 16 can also each all be of the same design, and only one Outer shape and an inner shape may be provided.
  • the inner mold 16 By moving the carriage 8 in the drawing (Fig. 1) To the left, the inner mold 16 can be in the working position downward open cylindrical shell-shaped form be pushed.
  • the outer shape is slightly larger than one Half cylinder and has a bending hole 18 in the cylinder jacket on whose inner hole edge is designed as a bending edge 20 (see also Fig. 4), on which the necking by tightening by means of a stamp is formed, which is explained in more detail below becomes.
  • the inner shape 16 is also with a hole in the cylinder jacket formed (see also FIG. 3), which as the receptacle 22nd for a stamp 24, with the help of the neck on the tube by tightening on the bending edge 20 of the outer shape 12 is formed, which is explained in more detail below.
  • the external shapes can also be on Carriage and the inner forms can be arranged stationary.
  • Reference numerals 30 and 32 denote threaded bores on the end face in the outer and inner forms 12 and 16 for attachment on the plates 10 and 14 by means of not shown Bolts.
  • the stamp 24 is shown in more detail in FIGS. 5a to 5c. It is designed as a hollow body, the outer surface as the surface of two intersecting vertically the same Large cylindrical surfaces 34, 36 is formed, the one Cylinder surface 34 vertical and the other cylinder surface 36 is arranged horizontally.
  • the cutting edge 38 is rounded, see. in particular Fig. 5a.
  • In the cylindrical round Top 39 is an elongated hole 40 with a circular arc in the middle Narrow sides 42, 44 are formed.
  • the elongated hole 40 has all around an undercut 46.
  • the slot 40 with the undercut 46 is used to accommodate one in the Fig. 5a to 5c, not shown, with reference to FIGS. 6a and 6b below locking device described in more detail.
  • the height of the stamp is equal to the radius of the cylinder 36 or chosen slightly larger than this radius so the necking becomes exactly circular.
  • the stamp 24 described has the great advantage that due to its shape an even distribution of the pulling forces on the tubular workpiece because the stamp is always on the workpiece. Thereby the risk of material breakage is avoided.
  • 6a and 6b show this from the inner mold 16, the External mold 12 and the stamp 24 existing tool on one Actuator 50.
  • the actuating device 50 comprises a locking and unlocking device 52, which via an adapter 54 or also directly with a piston rod of the hydraulic cylinder 28 connected is.
  • the locking and unlocking device 52 includes an after semicircular, disc-shaped locking element at the top 56 and two locking elements 58, 60 which, as shown, preferably in the form of circular disks are.
  • the locking member 56 is on a rectangular tie rod 62 arranged with the adapter 54 or the piston rod of the hydraulic cylinder 28 connected or for example how is screwed shown.
  • the locking elements 58, 60 are on a holder 64 by means of molded pendulum rods 66, 68 suspended like a pendulum.
  • the holder 64 is slidable arranged on the tie rod 62.
  • a limiting pin 70 arranged on the pull rod 62 limits the displacement of the holder 64 on the drawbar 62 down.
  • the holder 64 is also in a link guide 72 Unlocking member 74 slidably arranged, which one Guide slot 76 for a guide pin flattened on both sides 78, which is firmly in the backdrop guide 72 of the holder 64 is arranged.
  • the unlocking member 74 has inclined surfaces 80, 82 on the top and bottom.
  • the guide slot 76 opens at both ends in bores 81, 83, whose diameter is chosen so that rotation of the unlocking member 74 around the guide pin 78 is possible.
  • the lower end of the locking lever 90 can additionally have a weight 94 for weighting, preferably as Handle is formed.
  • the move Locking elements 58, 60 on the circular surface of the locking member 56 outwards and under the undercut 46 of the elongated hole 40 of the punch 24. If now the pull rod 62 is moved upwards with the locking member 56, the locking member 56 locks the locking elements 58 and 60 under the undercut 46, what the locking elements dashed lines in Fig. 6a is.
  • the stamp 24 is carried along taken above for bending or flanging the in the bending hole 18 of the edge of the hole protruding from the outer shape of the tubular workpiece 96 for the purpose of producing a neck.
  • To unlock the stamp 24 is after manufacture the necking and raising of the stamp the inner shape 16 pulled out of the workpiece and the outer shape 12 and the tie rod 62 by means of the hydraulic cylinder 28 moved down until the still through the locking member 56 and the locking elements 58, 60 locked Stamp 24 is placed in the inner mold 16 and by further Lowering the tie rod 62 and that by putting on Setting guide 72 caused the locking member to move away 56 of the locking elements 58 and 60 the locking elements can swing back in solid position shown in FIG. 6a and the locking lever 90 relative to the locking block 84 is moved down and with its locking pin 88 in the Blind hole 86 of the locking block 84 engages automatically.
  • the additional weight 94 supports this snapping.
  • the locking element can be pulled up by pulling the pull rod 62 56 and the locking elements 58, 60 the stamp 24 and are pulled out of the inner mold 16.
  • the device is now ready for the next drawing process.
  • the stamp described can advantageously be made neckings that have the same diameter as the tubular workpiece.
  • the neckings can also have a diameter arbitrarily smaller than that Diameter of the tubular workpiece.
  • the described device 52 for locking and unlocking is not only for stamps for the production of pipe neckings, but also with stamps for the production of Neckings in other workpieces, for example plate-shaped Workpieces, suitable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Punching Or Piercing (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

A device for producing a collar on a tube (96) consists of a tension rod (62) operated b a drive (28). The end of the rod has a locking device (56) and around the rod end is a locking block (84) with holder (64) for freely rotatable locking elements (58, 60). The block (84) is connected to the rod (62) by locking lever (90) whose locking pin (88) fits into hole (88) in the side of the block. As the rod moves downwardly and the device (56) enters the stamp (24), already located inside the tube (96) held between inner and outer moulds (12, 16) th decoupling member (74) is blocked by the stamp and as th block, holder and guide pin (78) continue to move downwardly the member (74) contacts th bottom surface of lever (90) forcing it to unlock from block (84). At this point the block and holder fall freely until they rest on pin (70). This fall causes the locking elements (58, 60) to rotate outwardly and lock onto the stamp. By moving the rod (62) upwardly the tube can be deformed to produce the required collar effect.

Description

Die Erfindung betrifft eine Vorrichtung zur Herstellung von Aushalsungen in Werkstücken, insbesondere in Rohren bzw. für Rohrabzweigungen.The invention relates to a device for production of neckings in workpieces, in particular in pipes or for pipe branches.

Es ist bekannt, solche Aushalsungen in Rohren mit Hilfe von Kugeln herzustellen, indem die Kugel in das Rohr eingeschoben und mittels beispielsweise hydraulisch betätigter Keilstempel durch ein in der Rohrwandung ausgeschnittenes Loch, dessen Durchmesser geringer ist als der Durchmesser der Kugel, hindurch nach außen gedrückt wird. Bei diesem Vorgang wird der Werkstoff unter Vergrößerung des Loches seitlich nach außen umgelegt zur Ausbildung einer Aushalsung oder eines Kragens, an die bzw. den dann beispielsweise Rohrstücke anbringbar sind. Diese bekannte Vorrichtung ist aufwendig und arbeitet umständlich und auch nicht zuverlässig.It is known to have such neckings in pipes with the help of balls by putting the ball in inserted the tube and by means of hydraulic, for example operated wedge stamp by a in the Pipe wall cut hole, its diameter is smaller than the diameter of the ball is pushed outwards. In this process, the Material by enlarging the hole laterally turned over to form a neck or a collar, to which, for example, then Pipe pieces are attachable. This known device is complex and laborious and also not reliable.

Aus der FR-A-2245431 ist ein Ziehdorn zum Aushalsen von Rohren bekannt, dessen Körper in seinem Außendurchmesser der Größe des auszuhalsenden Stutzens im Rohr entspricht. Die Ziehfläche des im wesentlichen zylindrischen Ziehdorns ist im mittleren Bereich als Teil einer Zylindermantelfläche ausgebildet, deren Mantellinien in Ziehstellung parallel zur Längsachse eines Langloches im Rohr verlaufen. Der übrige Teil der Ziehfläche ist gegenüber der Zylindermantelfläche zurückgesetzt. Bei einer anderen Ausführungsform des Ziehdorns besteht die Ziehfläche aus zwei sich kreuzenden Zylindermantelflächen, so daß vier symmetrische Sektoren entstehen. Der wesentliche Nachteil des bekannten Ziehdorns besteht darin, daß der Angriff des Ziehdorns auf das Werkstück nicht gleichmäßig über die gesamte Ziehfläche erfolgt, so daß nur eine ungleichmäßige Verformung erreicht wird und die Gefahr von Rißbildungen besteht.FR-A-2245431 is a mandrel for necking known from pipes, the body of which in his Outside diameter of the size of the neck to be necked in the pipe corresponds. The drag area of the essentially cylindrical mandrel is in the middle Area formed as part of a cylindrical surface, whose surface lines in the pulling position parallel run to the longitudinal axis of an elongated hole in the tube. The remaining part of the drawing surface is opposite to the cylinder surface reset. Another one Embodiment of the mandrel is the drawing surface from two intersecting cylinder jacket surfaces, see above that four symmetrical sectors arise. The essential The disadvantage of the known mandrel is that that the mandrel does not attack the workpiece done evenly over the entire drawing area, so that only an uneven deformation is achieved and there is a risk of cracking.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine neuartige Vorrichtung zur Herstellung von Aushalsungen in Werkstücken anzugeben, die einfach und zuverlässig arbeitet.The object of the present invention is therein a novel device for the production of Specify neckings in workpieces that are simple and works reliably.

Diese Aufgabe wird durch die Erfindung gemäß Anspruch 1 gelöst.This object is achieved by the invention Claim 1 solved.

Vorteilhafte und zweckmäßige Weiterbildungen der Erfindung nach Anspruch 1 sind in den Unteransprüchen angegeben.Advantageous and practical training of the invention according to claim 1 are in the dependent claims specified.

Die Erfindung soll nachfolgend anhand der beigefügten Zeichnung, in der ein Ausführungsbeispiel dargestellt ist, näher erläutert werden.The invention will now be described with reference to the accompanying Drawing in which an embodiment is shown are explained in more detail.

Es zeigt

Fig. 1
schematisch eine Vorrichtung zur Herstellung von Aushalsungen in Rohren mit einer Außen- und einer Innenform als Teile eines Werkzeuges,
Fig. 2
schematisch eine Seitenansicht auf eine bei der Vorrichtung nach Fig. 1 verwendete Aufnahme für mehrere Außenformen unterschiedlicher Größe,
Fig. 3a und 3b
die Innenform des Werkzeuges der Vorrichtung nach Fig. 1 in einer Vorderansicht und einer Seitenansicht,
Fig. 4a und 4b
die Außenform des Werkzeuges der Vorrichtung nach Fig. 1 in einer axialen Ansicht und einer Seitenansicht,
Fig. 5a, 5b und 5c
einen bei der Vorrichtung nach Fig. 1 verwendeten Zieh-Stempel des Werkzeuges in einer Vorderansicht, einer Seitenansicht und einer Draufsicht und
Fig. 6a und 6b
eine bei der Vorrichtung nach Fig. 1 eingesetzte Vorrichtung zur Betätigung des Zieh-Stempels nach Fig. 5 mit einer Verriegelungsund Entriegelungsvorrichtung in einer Vorderansicht und einer Seitenansicht - teilweise im Schnitt.
It shows
Fig. 1
schematically a device for producing neckings in pipes with an outer and an inner shape as parts of a tool,
Fig. 2
1 schematically shows a side view of a receptacle used for the device according to FIG. 1 for several outer shapes of different sizes,
3a and 3b
1 the inside shape of the tool of the device according to FIG. 1 in a front view and a side view,
4a and 4b
1 the external shape of the tool of the device according to FIG. 1 in an axial view and a side view,
5a, 5b and 5c
a pulling stamp of the tool used in the device of FIG. 1 in a front view, a side view and a plan view and
6a and 6b
a device used in the device of FIG. 1 for actuating the drawing die according to FIG. 5 with a locking and unlocking device in a front view and a side view - partly in section.

Gleiche Bauteile in den Figuren der Zeichnung sind mit den gleichen Bezugszeichen versehen.The same components in the figures of the drawing are included provided with the same reference numerals.

Die Zeichnung zeigt eine Vorrichtung 2 zur Herstellung von Aushalsungen in Rohren mit einer Grundplatte 4, auf dem ein erstes Gestell 6 fest und ein zweites, als Schlitten ausgebildetes Gestell 8 verschiebbar (siehe Pfeil 9) angeordnet sind, vgl. Fig. 1. Am ersten Gestell 6 ist eine erste Platte 10, vorzugsweise kreisförmige Platte, drehbar angeordnet, auf der auf einem Kreis mehrere zylinderschalenförmige Außenformen 12 unterschiedlicher Größe angeordnet sind, vgl. Fig. 2. The drawing shows a device 2 for production of neckings in pipes with a base plate 4, on the a first frame 6 fixed and a second, designed as a slide Frame 8 slidably arranged (see arrow 9) are, cf. Fig. 1. On the first frame 6 is a first plate 10, preferably circular plate, rotatably arranged on of several cylindrical bowl-shaped outer forms on a circle 12 different sizes are arranged, cf. Fig. 2.

Am Schlitten 8 ist eine zweite Platte 14, vorzugsweise kreisförmige Platte, drehbar angeordnet, auf der auf einem Kreis mehrere zylinderförmige, den Außenformen 12 zugeordnete Innenformen 16 angeordnet sind, deren Außendurchmesser kleiner als der Innendurchmesser der Außenformen ist.On the carriage 8 is a second plate 14, preferably circular plate, rotatably arranged on which on a Circle several cylindrical, the outer shapes 12 assigned Inner molds 16 are arranged, whose outer diameter is smaller than the inside diameter of the outer molds.

Die Außenformen 12 und Innenformen 16 können jeweils auch sämtlich gleich ausgebildet sein, und es kann auch nur eine Außenform und eine Innenform vorgesehen sein.The outer shapes 12 and inner shapes 16 can also each all be of the same design, and only one Outer shape and an inner shape may be provided.

Durch Verfahren des Schlittens 8 in der Zeichnung (Fig. 1) nach links kann die Innenform 16 in die in der Arbeitsstellung nach unten offene zylinderschalenförmige Außenform geschoben werden. Die Außenform ist etwas größer als ein Halbzylinder und weist im Zylindermantel ein Biegeloch 18 auf, dessen Lochinnenkante als Biegekante 20 ausgebildet ist (vgl. auch Fig. 4), an der die Aushalsung durch Anziehen mittels eines Stempels geformt wird, was weiter unten näher erläutert wird.By moving the carriage 8 in the drawing (Fig. 1) To the left, the inner mold 16 can be in the working position downward open cylindrical shell-shaped form be pushed. The outer shape is slightly larger than one Half cylinder and has a bending hole 18 in the cylinder jacket on whose inner hole edge is designed as a bending edge 20 (see also Fig. 4), on which the necking by tightening by means of a stamp is formed, which is explained in more detail below becomes.

Die Innenform 16 ist ebenfalls mit einem Loch im Zylindermantel ausgebildet (vgl. auch Fig. 3), das als Aufnahme 22 für einen Stempel 24 dient, mit dessen Hilfe die Aushalsung an dem Rohr durch Anziehen an der Biegekante 20 der Außenform 12 geformt wird, was weiter unten näher erläutert wird.The inner shape 16 is also with a hole in the cylinder jacket formed (see also FIG. 3), which as the receptacle 22nd for a stamp 24, with the help of the neck on the tube by tightening on the bending edge 20 of the outer shape 12 is formed, which is explained in more detail below.

Am Schlitten 8 ist ein Ausleger 26 zur Aufnahme eines Hydraulikzylinders 28 angeordnet, welcher über eine unten näher beschriebene Vorrichtung den Stempel 24 betätigt.On the carriage 8 is a boom 26 for receiving a Hydraulic cylinder 28 arranged, which has a bottom Device described in more detail actuates the stamp 24.

Anders als dargestellt können auch die Außenformen am Schlitten und die Innenformen ortsfest angeordnet sein.In contrast to the illustration, the external shapes can also be on Carriage and the inner forms can be arranged stationary.

Bezugszeichen 30 und 32 bezeichnen stirnseitige Gewindebohrungen in den Außen- und Innenformen 12 und 16 zur Befestigung an den Platten 10 und 14 mittels nicht dargestellter Schraubbolzen.Reference numerals 30 and 32 denote threaded bores on the end face in the outer and inner forms 12 and 16 for attachment on the plates 10 and 14 by means of not shown Bolts.

Der Stempel 24 ist in den Fig. 5a bis 5c näher dargestellt. Er ist als Hohlkörper ausgebildet, dessen Außenfläche als Fläche zweier sich senkrecht schneidender gleich großer Zylinderflächen 34, 36 ausgebildet ist, wobei die eine Zylinderfläche 34 senkrecht und die andere Zylinderfläche 36 waagerecht angeordnet ist. Die Schnittkante 38 ist abgerundet, vgl. insbesondere Fig. 5a. In der zylindrisch runden Oberseite 39 ist mittig ein Langloch 40 mit kreisbogenförmigen Schmalseiten 42, 44 ausgebildet. Das Langloch 40 weist rundherum eine Hinterschneidung 46 auf. Das Langloch 40 mit der Hinterschneidung 46 dient zur Aufnahme einer in den Fig. 5a bis 5c nicht dargestellten, anhand der Fig. 6a und 6b unten näher beschriebenen Verriegelungsvorrichtung. Die Höhe des Stempels wird gleich dem Radius des Zylinders 36 oder etwas größer als dieser Radius gewählt, damit die Aushalsung exakt kreisrund wird. Der beschriebene Stempel 24 hat den großen Vorteil, daß durch seine Form eine gleichmäßige Verteilung der Ziehkräfte auf das rohrförmige Werkstück erreicht wird, da der Stempel stets überall am Werkstück anliegt. Dadurch ist die Gefahr eines Materialrisses vermieden.The stamp 24 is shown in more detail in FIGS. 5a to 5c. It is designed as a hollow body, the outer surface as the surface of two intersecting vertically the same Large cylindrical surfaces 34, 36 is formed, the one Cylinder surface 34 vertical and the other cylinder surface 36 is arranged horizontally. The cutting edge 38 is rounded, see. in particular Fig. 5a. In the cylindrical round Top 39 is an elongated hole 40 with a circular arc in the middle Narrow sides 42, 44 are formed. The elongated hole 40 has all around an undercut 46. The slot 40 with the undercut 46 is used to accommodate one in the Fig. 5a to 5c, not shown, with reference to FIGS. 6a and 6b below locking device described in more detail. The height of the stamp is equal to the radius of the cylinder 36 or chosen slightly larger than this radius so the necking becomes exactly circular. The stamp 24 described has the great advantage that due to its shape an even distribution of the pulling forces on the tubular workpiece because the stamp is always on the workpiece. Thereby the risk of material breakage is avoided.

Die Fig. 6a und 6b zeigen das aus der Innenform 16, der Außenform 12 und dem Stempel 24 bestehende Werkzeug an einer Betätigungsvorrichtung 50.6a and 6b show this from the inner mold 16, the External mold 12 and the stamp 24 existing tool on one Actuator 50.

Die Betätigungsvorrichtung 50 umfaßt eine Ver- und Entriegelungsvorrichtung 52, welche über einen Adapter 54 oder auch direkt mit einer Kolbenstange des Hydraulikzylinders 28 verbunden ist.The actuating device 50 comprises a locking and unlocking device 52, which via an adapter 54 or also directly with a piston rod of the hydraulic cylinder 28 connected is.

Die Ver- und Entriegelungsvorrichtung 52 umfaßt ein nach oben halbkreisförmiges, scheibenförmiges Verriegelungsorgan 56 und zwei Verriegelungselemente 58, 60, die, wie dargestellt, vorzugsweise in Form von Kreisscheiben ausgebildet sind.The locking and unlocking device 52 includes an after semicircular, disc-shaped locking element at the top 56 and two locking elements 58, 60 which, as shown, preferably in the form of circular disks are.

Das Verriegelungsorgan 56 ist an einer Rechteck-Zugstange 62 angeordnet, die mit dem Adapter 54 bzw. der Kolbenstange des Hydraulikzylinders 28 verbunden oder beispielsweise wie dargestellt verschraubt ist. Die Verriegelungselemente 58, 60 sind an einem Halter 64 vermittels angeformter Pendelstangen 66, 68 pendelartig aufgehängt. Der Halter 64 ist verschiebbar auf der Zugstange 62 angeordnet.The locking member 56 is on a rectangular tie rod 62 arranged with the adapter 54 or the piston rod of the hydraulic cylinder 28 connected or for example how is screwed shown. The locking elements 58, 60 are on a holder 64 by means of molded pendulum rods 66, 68 suspended like a pendulum. The holder 64 is slidable arranged on the tie rod 62.

Ein an der Zugstange 62 angeordneter Begrenzungsstift 70 begrenzt den Verschiebeweg des Halters 64 auf der Zugstange 62 nach unten.A limiting pin 70 arranged on the pull rod 62 limits the displacement of the holder 64 on the drawbar 62 down.

Am Halter 64 ist ferner in einer Kulissenführung 72 ein Entriegelungsglied 74 verschiebbar angeordnet, welches einen Führungsschlitz 76 für einen beidseitig abgeflachten Führungsstift 78 aufweist, welcher fest in der Kulissenführung 72 des Halters 64 angeordnet ist. Das Entriegelungsglied 74 weist oberseitig und unterseitig Schrägflächen 80, 82 auf. Der Führungsschlitz 76 mündet beidendig in Bohrungen 81, 83, deren Durchmesser so gewählt ist, daß eine Drehung des Entriegelungsgliedes 74 um den Führungsstift 78 möglich ist.The holder 64 is also in a link guide 72 Unlocking member 74 slidably arranged, which one Guide slot 76 for a guide pin flattened on both sides 78, which is firmly in the backdrop guide 72 of the holder 64 is arranged. The unlocking member 74 has inclined surfaces 80, 82 on the top and bottom. The guide slot 76 opens at both ends in bores 81, 83, whose diameter is chosen so that rotation of the unlocking member 74 around the guide pin 78 is possible.

Oberhalb des Halters 64 ist ein mit diesem fest verbundener und entlang der Zugstange 62 verschiebbarer Verriegelungsblock 84 angeordnet, welcher eine vorzugsweise schräg aufwärts zeigende Sackbohrung 86 aufweist, in die ein Verriegelungsstift 88 einführbar ist, welcher am unteren Ende eines Verriegelungshebels 90 angebracht ist, welcher mit seinem oberen Ende drehbar an einem Arm 92 angeordnet ist, welcher fest mit der Zugstange 62 bzw. dem Adapter 54 verbunden ist. Das untere Ende des Verriegelungshebels 90 kann zusätzlich ein Gewicht 94 zum Beschweren aufweisen, das vorzugsweise als Griff ausgebildet ist.Above the holder 64 there is a fixed one and locking block slidable along the tie rod 62 84 arranged, which is preferably angled has upwardly facing blind bore 86 into which a locking pin 88 is insertable, which is at the lower end of a Locking lever 90 is attached, which with its upper end is rotatably arranged on an arm 92 which is firmly connected to the pull rod 62 or the adapter 54. The lower end of the locking lever 90 can additionally have a weight 94 for weighting, preferably as Handle is formed.

Die beschriebene Vorrichtung arbeitet wie folgt:The described device works as follows:

Zunächst wird im auseinandergefahrenen Zustand von Gestell 6 und Schlitten 8 der Stempel 24 über das Aufnahmeloch 22 in die zylindrische Innenform 16 gelegt; danach wird ein rohrförmiges Werkstück 96, beispielsweise ein V4a-Schornsteinrohr, an dem eine Aushalsung ausgebildet werden soll, so über die Innenform 16 geschoben, daß ein im Werkstück 96 vorgefertigtes Loch über das Aufnahmeloch 22 zu liegen kommt; danach wird die Außenform 12 durch Verschieben des Schlittens 8 über das Werkstück 96 und die Innenform 16 gefahren, derart, daß das Biegeloch 18 der Außenform mit dem Loch des Werkstückes und dem Stempel in der Innenform fluchtet. In der Fig. 1 und Fig. 6 ist dieser Zustand schematisch dargestellt.First of all, when the frame is pulled apart 6 and slide 8 of the punch 24 over the receiving hole 22 placed in the cylindrical inner mold 16; after that will be a tubular workpiece 96, for example a V4a chimney pipe, on which a neck should be formed, so pushed over the inner mold 16 that a prefabricated in the workpiece 96 Hole comes to rest over the receiving hole 22; then the outer shape 12 by moving the carriage 8 moved over the workpiece 96 and the inner mold 16, such that the bending hole 18 of the outer shape with the hole of the Aligned workpiece and the stamp in the inner shape. In the Fig. 1 and Fig. 6, this state is shown schematically.

Die Fig. 6 zeigt die Vorrichtung 52 im teilweise abgesenkten Zustand, d. h. in dem Zustand, in dem das Verriegelungsorgan 56 und die Verriegelungselemente 58, 60 in den Stempel 24 eingefahren werden zur Verriegelung mit dem Stempel. Beim weiteren Absenken mittels des Hydraulikzylinders 28 setzt das Entriegelungsglied 74 auf den Stempel 24 auf, wird geführt vom Führungsstift 78 nach oben geschoben und läuft mit seiner Schrägfläche 80 gegen die schräg ausgebildete Unterseite 98 des Verriegelungshebels 90 und verschwenkt infolge der Keilwirkung den Verriegelungshebel 90 nach außen, wodurch der Verriegelungsstift 88 aus der Sackbohrung 86 ausrückt; hierdurch werden der Verriegelungsblock 84 und der Halter 64 frei und fallen zusammen mit den Verriegelungselementen 58, 60 und dem Führungsstift 78 auf der Zugstange 62 nach unten bis zur Anlage auf dem Begrenzungsstift 70. Dabei gelangt der Führungsstift 78 in das jeweils untere Loch (hier Loch 83) des Entriegelungsgliedes 74, wodurch dieses Entriegelungsglied infolge der schrägen unteren Fläche 82 mit seinem oberen Ende nach außen kippt. Ferner bewegen sich die Verriegelungselemente 58, 60 auf der Kreisfläche des Verriegelungsorganes 56 nach außen und unter die Hinterschneidung 46 des Langloches 40 des Stempels 24. Wenn jetzt die Zugstange 62 mit dem Verriegelungsorgan 56 nach oben bewegt wird, verriegelt das Verriegelungsorgan 56 die Verriegelungselemente 58 und 60 unter der Hinterschneidung 46, was für die Verriegelungselemente gestrichelt in der Fig. 6a eingezeichnet ist. Durch weiteres Hochziehen wird der Stempel 24 mit nach oben genommen zum Umbiegen oder Umbördeln des in das Biegeloch 18 des der Außenform hineinragenden Randes des Loches des rohrförmigen Werkstückes 96 zwecks Herstellung einer Aushalsung.6 shows the device 52 partially lowered Condition, d. H. in the state in which the locking member 56 and the locking elements 58, 60 in the Stamp 24 are retracted for locking with the stamp. When lowering further by means of the hydraulic cylinder 28 sets the unlocking member 74 on the stamp 24, is guided upwards by the guide pin 78 and runs with its inclined surface 80 against the inclined underside 98 of the locking lever 90 and pivots as a result the wedge action the locking lever 90 outwards, whereby the locking pin 88 disengages from the blind bore 86; this will lock block 84 and Holder 64 free and fall together with the locking elements 58, 60 and the guide pin 78 on the pull rod 62 down to the system on the limit pin 70 the guide pin 78 gets into the respective lower hole (here Hole 83) of the unlocking member 74, whereby this unlocking member due to the sloping lower surface 82 with his the upper end tilts outwards. Furthermore, the move Locking elements 58, 60 on the circular surface of the locking member 56 outwards and under the undercut 46 of the elongated hole 40 of the punch 24. If now the pull rod 62 is moved upwards with the locking member 56, the locking member 56 locks the locking elements 58 and 60 under the undercut 46, what the locking elements dashed lines in Fig. 6a is. By further pulling up, the stamp 24 is carried along taken above for bending or flanging the in the bending hole 18 of the edge of the hole protruding from the outer shape of the tubular workpiece 96 for the purpose of producing a neck.

Zum Entriegeln des Stempels 24 wird nach erfolgter Herstellung der Aushalsung und Hochfahren des Stempels die Innenform 16 aus dem Werkstück und der Außenform 12 herausgezogen und die Zugstange 62 mit Hilfe des Hydraulikzylinders 28 nach unten gefahren, bis der noch durch das Verriegelungsorgan 56 und die Verriegelungselemente 58, 60 verriegelte Stempel 24 in der Innenform 16 aufsetzt und durch weiteres Absenken der Zugstange 62 und das durch das Aufsetzen der Kulissenführung 72 bewirkte Abrücken des Verriegelungsorganes 56 von den Verriegelungselementen 58 und 60 die Verriegelungselemente wieder nach innen schwenken können in die durchgezogen dargestellte Stellung gemäß Fig. 6a und der Verriegelungshebel 90 relativ zum Verriegelungsblock 84 nach unten bewegt wird und mit seinem Verriegelugnsstift 88 in die Sackbohrung 86 des Verriegelungsblockes 84 selbsttätig einrastet. Das Zusatzgewicht 94 unterstützt dieses Einrasten.To unlock the stamp 24 is after manufacture the necking and raising of the stamp the inner shape 16 pulled out of the workpiece and the outer shape 12 and the tie rod 62 by means of the hydraulic cylinder 28 moved down until the still through the locking member 56 and the locking elements 58, 60 locked Stamp 24 is placed in the inner mold 16 and by further Lowering the tie rod 62 and that by putting on Setting guide 72 caused the locking member to move away 56 of the locking elements 58 and 60 the locking elements can swing back in solid position shown in FIG. 6a and the locking lever 90 relative to the locking block 84 is moved down and with its locking pin 88 in the Blind hole 86 of the locking block 84 engages automatically. The additional weight 94 supports this snapping.

Jetzt können durch Hochziehen der Zugstange 62 das Verriegelungsorgan 56 und die Verriegelungselemente 58, 60 aus dem Stempel 24 und aus der Innenform 16 herausgezogen werden. Dabei wird das Ende des Entriegelungsgliedes 74, in dem sich der Führungsstift 78 befindet, durch den Führungsstift 78 mit nach oben genommen, und das Entriegelungsglied 74 verschwenkt selbsttätig wieder in die senkrechte Lage. Die Vorrichtung ist jetzt für den nächsten Ziehvorgang bereit. Mit der beschriebenen Vorrichtung, insbesondere dem beschriebenen Stempel, können vorteilhaft Aushalsungen hergestellt werden, die den gleichen Durchmesser aufweisen wie das rohrförmige Werkstück. Mit der beschriebenen Vorrichtung ist es auch möglich, zwei oder sich gegenüberliegende oder versetzt zueinander angeordnete Aushalsungen zu erzeugen, wobei die Aushalsungen auch einen Durchmesser haben können beliebig kleiner als der Durchmesser des rohrförmigen Werkstücks.Now the locking element can be pulled up by pulling the pull rod 62 56 and the locking elements 58, 60 the stamp 24 and are pulled out of the inner mold 16. The end of the unlocking member 74, in which the guide pin 78 is located with the guide pin 78 taken up, and the unlocking member 74 pivoted automatically back into the vertical position. The device is now ready for the next drawing process. With the described Device, in particular the stamp described, can advantageously be made neckings that have the same diameter as the tubular workpiece. With the device described, it is also possible two or opposite or offset from each other to produce arranged neckings, the neckings can also have a diameter arbitrarily smaller than that Diameter of the tubular workpiece.

Die beschriebene Vorrichtung 52 zum Verriegeln und Entriegeln ist nicht nur bei Stempeln zur Herstellung von Rohraushalsungen, sondern auch bei Stempeln zur Herstellung von Aushalsungen in anderen Werkstücken, beispielsweise plattenförmigen Werkstücken, geeignet.The described device 52 for locking and unlocking is not only for stamps for the production of pipe neckings, but also with stamps for the production of Neckings in other workpieces, for example plate-shaped Workpieces, suitable.

Claims (6)

  1. Device for forming flanged collars in workpieces comprising a forming tool comprising a bending former to receive the workpiece and a convex plunger to draw through the bending former, further an actuator for the plunger, characterised in that the actuator (50) comprises a draw bar (62) driven by a drive means (28), a system (52) for receiving, locking and unlocking the plunger (24) being mounted on said draw bar (62), the outer surface of said plunger being designed to be the surface (34, 36) of a vertical cylinder and the surface of an equally large cylinder horizontally intersecting said vertical cylinder, the intersecting edges (38) of both cylinders being rounded.
  2. Device as claimed in claim 1, characterised in that the plunger (24) is provided with an elongated slot (40), located centrally on its cylindrically round upper top side (39, for operative connection with said actuator (50).
  3. Device as claimed in claim 1, characterised in that the bending former comprises a cylindrical inner forming segment (16) fitted with a hole (22) receiving the plunger (24), a tubular workpiece (96) to be processed being displaceable over said inner forming segment (16), further a downwardly open outer forming segment (12) of which the inside radius is larger at least by the amount of the thickness of the tubular workpiece (96) being processed than the outside radius of the inner forming segment, said outer forming segment being fitted with a bending hole (18) cooperating with the plunger (24) and evincing an inside in said hole designed as a bending edge (20), said outer forming segment being displaceable over the inner forming segment (16) and the workpiece (96).
  4. Device as claimed in claim 3, characterised in that the external surface of the outer forming segment (12) is somewhat larger than the external surface of a half-cylinder.
  5. Device as claimed in either of claims 1 and 3, characterised in that several different inner forming segments (16) and several outer forming segments (12) associated to said inner forming segments are mounted mutually opposite on vertical rotating plates (14, 10) , at least one of said plates being displaceably mounted on a carriage (8).
  6. Device as claimed in either of claims 1, 2 and 3, characterised in that the plunger height is equal to or somewhat larger than the radius of the cylinder (36).
EP97103051A 1996-02-27 1997-02-26 Device for forming flanged collars in workpieces Expired - Lifetime EP0792702B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19607311A DE19607311A1 (en) 1996-02-27 1996-02-27 Device for producing neckings in workpieces
DE19607311 1996-02-27

Publications (3)

Publication Number Publication Date
EP0792702A2 EP0792702A2 (en) 1997-09-03
EP0792702A3 EP0792702A3 (en) 1997-11-05
EP0792702B1 true EP0792702B1 (en) 2000-08-16

Family

ID=7786551

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97103051A Expired - Lifetime EP0792702B1 (en) 1996-02-27 1997-02-26 Device for forming flanged collars in workpieces

Country Status (5)

Country Link
US (1) US6021571A (en)
EP (1) EP0792702B1 (en)
AT (1) ATE195446T1 (en)
CZ (1) CZ56697A3 (en)
DE (3) DE19607311A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2343981A1 (en) * 1973-08-31 1975-03-20 Messer Griesheim Gmbh METHOD AND DEVICE FOR COLLARING PIPES

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368394A (en) * 1943-05-03 1945-01-30 Young Radiator Co Apparatus for flanging openings in tube type headers
US2507859A (en) * 1947-10-13 1950-05-16 Ladish Drop Forge Co Method of making pipe fittings
DE2511491C2 (en) * 1975-03-15 1983-07-21 Ing. Edwin Rothenberger Schweisstechnik- U. Industrie-Bedarf, 6000 Frankfurt Necking device for forming cylindrical extensions on the circumference of pipelines etc.
US4106322A (en) * 1976-09-22 1978-08-15 Evgeny Nikolaevich Moshnin Press for pressing pipe fittings
IT1116912B (en) * 1977-04-04 1986-02-10 Verrina Spa MACHINE FOR FORMING DRAWN COLLARS IN CYLINDRICAL PLATE COLLECTORS EVEN OF LARGE THICKNESS
JPS609519A (en) * 1983-06-29 1985-01-18 Hitachi Ltd Formation of branch pipe
JPS60244422A (en) * 1984-05-17 1985-12-04 Hitachi Ltd Apparatus for producing branched pipe joint
US4676088A (en) * 1985-06-10 1987-06-30 Hitachi, Ltd. T-joint manufacturing apparatus
DE3744046C2 (en) * 1987-12-24 1994-11-24 Westaflexwerk Gmbh & Co Kg Method and device for necking thin-walled sheet metal tubes
ATE229598T1 (en) * 1993-10-06 2002-12-15 Toto Ltd TAP MADE OF TUBE MATERIAL AND METHOD FOR PRODUCING IT

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2343981A1 (en) * 1973-08-31 1975-03-20 Messer Griesheim Gmbh METHOD AND DEVICE FOR COLLARING PIPES

Also Published As

Publication number Publication date
CZ56697A3 (en) 1997-11-12
DE19607311A1 (en) 1997-08-28
ATE195446T1 (en) 2000-09-15
DE29612422U1 (en) 1996-12-19
EP0792702A3 (en) 1997-11-05
DE59702173D1 (en) 2000-09-21
EP0792702A2 (en) 1997-09-03
US6021571A (en) 2000-02-08

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