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EP0114570B1 - Device for the extrusion of a hollow section - Google Patents

Device for the extrusion of a hollow section Download PDF

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Publication number
EP0114570B1
EP0114570B1 EP83810591A EP83810591A EP0114570B1 EP 0114570 B1 EP0114570 B1 EP 0114570B1 EP 83810591 A EP83810591 A EP 83810591A EP 83810591 A EP83810591 A EP 83810591A EP 0114570 B1 EP0114570 B1 EP 0114570B1
Authority
EP
European Patent Office
Prior art keywords
die
recess
flange
pressing
shaping
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
Application number
EP83810591A
Other languages
German (de)
French (fr)
Other versions
EP0114570A2 (en
EP0114570A3 (en
Inventor
Alfred Wagner
Adolf Ames
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.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium AG
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 Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Publication of EP0114570A2 publication Critical patent/EP0114570A2/en
Publication of EP0114570A3 publication Critical patent/EP0114570A3/en
Application granted granted Critical
Publication of EP0114570B1 publication Critical patent/EP0114570B1/en
Expired 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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/217—Tube extrusion presses
    • 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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making 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
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/14—Making other products
    • 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
    • B21C25/00—Profiling tools for metal extruding
    • B21C25/02—Dies

Definitions

  • the invention relates to a device for extruding a hollow profile from a block, in particular made of light metal, which is brought up in a block receiver to the shaping cross section of a die and inserted into it by means of the pressing force of a press die, the hollow profile between a mandrel determining its inner contour and the its shaping cross-section, which produces the outer contour, is formed and, at the end of the pressing process, a flange is formed which overlaps the shaping cross-section towards the stamp.
  • An extrusion press for such a pressing process is known from DE-A-2935804.
  • the block is partially pressed between the stamping die and the die and the outer shape of the flange is determined by the receiver bore containing the block. After the tube / flange unit has been created, it is removed against the pressing direction.
  • the invention has for its object to develop the device of the type mentioned in such a way that the circumferential contour of the flange remains independent of the shape of the transducer bore. In addition, it should be possible to pull off the pipe provided with the flange in the pressing direction.
  • the die forms both the hollow profile and the flange which is stuck thereon in its entire height.
  • Particular developments of the invention are characterized in the subclaims.
  • the embodiment according to claim 3 is particularly advantageous when large-height flanges are to be produced.
  • the finished hollow profile with flange can be removed from the extrusion press in the pressing direction.
  • the divided surfaces delimiting the shaping cross-section can be moved apart by a gap, forming a gap, which is larger than the corresponding extension of the flange, so that the latter can be extended by the tool or the die.
  • DE-C-92 64 82 indicates that matrices of extrusion presses can be divided radially per se.
  • the separating surfaces of the die parts - and optionally also the parts of a tool holder containing these die parts - advantageously run diagonally through the flange floor plan, i. H. through two of the floor plan corners. These corners preferably determine vertical dividing surfaces, which allows the die parts to be moved laterally.
  • the radially split die is held together during the pressing process by a surrounding pressure ring, which either represents a separate machine part or is formed by the block receiver.
  • the contours of the cavern determine the shape of the flange, it is also possible according to claim 1 to design the flange with ring ribs or the like if there are corresponding shaped channels in the cavern floor.
  • a hollow press die 4 projects into a bore 5 of a block receiver 6 according to FIG. 1.
  • the maximum distance a between the cylinder-side receiver front 7 and the press surface 8 of a press disk provided on the press die 4 9 in - not shown - rest position of the press ram 4 is dimensioned such that in this rest position of the transducer bore 5, a hollow bolt B made of light metal can be inserted through a loading carriage 11. If the pin axis A is aligned coaxially with the press axis E, the pin B is pushed into the receiver 6 by the press ram 4 in the pressing direction x.
  • a die 20 is seated in a tool holder 19 as a molding tool.
  • the tool holder 19 is supported against a crosshead 21 at the press exit.
  • the tool holder 19 and die 20 are divided on the vertical diameter D of the circular shaping cross section or die opening 23 and can be moved apart in the radial direction z; the shaping cross section 23 thus limit two half rings 24, 24 a . From these, an outlet channel 25 widens conically to a through opening 26 of the crosshead 21.
  • an indentation 30 lies in front of the die opening 23 in the die 20, the greatest width b of which is slightly larger than the diameter f of the receiver bore 5.
  • the side walls 31 of this indentation 30 delimit an almost square outline according to FIG. 3 and are one Embodiment curved (31 a in Fig. 5).
  • the pitch diameter D forms a diagonal through two mutually opposite molding corners 32, which are thus located on the parting surfaces 33 of the die 20.
  • This indentation 30 receives a part of the matrix B formed from the bolt B, which is formed into the hollow profile 3 during the pressing process.
  • This consists of a tubular part 35, the inner contour of the mandrel column 14 and the outer contour of the half rings 24, 24 a of the die opening 23 are determined, and a flange 36 integrally formed therewith with a height i.
  • This flange 36 arises from the baling residue of the matrix B ,.
  • the distance of this flange 36 from the side walls 31 of the indentation 30 is shown exaggerated in FIG. 3.
  • the flange 36 can be removed after pressing the bolt B completely and moving the die halves 20 a and 20 b (FIG. 5) between them in the pressing direction x. Before the extruded hollow profile 3 is pulled off, the mandrel column 14 is retracted, flange corners 36 e being supported against the transducer face 18.
  • the die 20 expands in the pressing direction x from its die front 40 to form a truncated cone-like closing pressure surface 41 of a length n up to an annular surface 42, which is a shoulder-like ring shoulder 43 follows; the latter abuts an annular rib 44 of the tool holder 19.
  • the closing pressure surface 41 which is inclined at an angle w of, for example, 15 ° to the press axis E, encloses an approximately parallel pressure wall 49 of a central recess 50 of the one-piece block receiver 6, as is particularly clear from FIG. 4.
  • the closing pressure surface 41 can also be encompassed by a closing ring 51, which abuts a nose 52 of the die 20 and whose thickness h corresponds at least to the height i of the flange 36.
  • FIG. 7 An embodiment of FIG. 7 is produced thanks to a shaped groove 45 of the die 20, delimited by a shaped rib 46, a flange 36 with a circumferential rib 37, the flange 36 projecting over the die front 40; the projecting flange part is formed in a shaped cavity 54 of the transducer face 18, to which the central transducer opening 50 connects in the pressing direction x.
  • flange tubes 3 in one piece, which can be used, for example, as recipients for centrifuges of uranium separation systems.
  • the outline shape of the flange 36 which is determined by the indentation 30. freely selectable, as well as the diameter d of the flange tube 3. It is also up to the respective circumstances whether conventional hollow bolts B are used or these are tempered beforehand.
  • the device for solution annealing of the bolt B is not shown in the drawing.
  • the mandrel column 14 can be designed to move along or be a fixed part of the press ram 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Strangpressen eines Hohlprofils aus einem Block, insbesondere aus Leichtmetall, der in einem Blockaufnehmer an den Formgebungsquerschnitt einer Matrize herangebracht und in diesen mittels Presskraft eines Pressstempels eingeführt wird, wobei das Hohlprofil zwischen einem seine Innenkontur bestimmenden Dorn sowie dem seine Aussenkontur erzeugenden Formgebungsquerschnitt entsteht und am Ende des Pressvorganges ein den Formgebungsquerschnitt stempelwärts übergreifender Flansch angeformt wird.The invention relates to a device for extruding a hollow profile from a block, in particular made of light metal, which is brought up in a block receiver to the shaping cross section of a die and inserted into it by means of the pressing force of a press die, the hollow profile between a mandrel determining its inner contour and the its shaping cross-section, which produces the outer contour, is formed and, at the end of the pressing process, a flange is formed which overlaps the shaping cross-section towards the stamp.

Eine Strangpresse für einen derartigen Pressvorgang ist aus der DE-A-2935804 bekannt. In dieser wird zum Herstellen von zumindest zwei durch einen Flansch verbundenen Rohren zwischen Pressstempel und Matrize der Block teilweise verpresst und die Aussenform des Flansches von der den Block enthaltenden Aufnehmerbohrung bestimmt. Nach dem Entstehen der Einheit Rohr/Flansch wird diese gegen die Pressrichtung entnommen.An extrusion press for such a pressing process is known from DE-A-2935804. In order to produce at least two tubes connected by a flange, the block is partially pressed between the stamping die and the die and the outer shape of the flange is determined by the receiver bore containing the block. After the tube / flange unit has been created, it is removed against the pressing direction.

Aus der DE-C-92 64 82 ist es ausserdem an sich bekannt, Flansche, Bunde oder dergleichen an Rohre durch Strangpressen dadurch zu bilden, dass am Ende des Rohrpressens ein entsprechend dick bemessener Pressrest belassen wird. Beim Verfahren nach der DE-C-926482 wird ein anderer Weg als bei der Erfindung beschritten ; es wird ein Vorrohr hergestellt und in dieses eine Umfangsnut eingebracht, wonach man ein unterteiltes Mundstück in die Umfangsnut der Vorwerkstückes einschiebt und daraufhin einen Pressstempel in Bewegung setzt. Es werden also zwei Arbeitsgänge durchgeführt, um - gegebenenfalls an beiden Enden - beflanschte Rohre herzustellen. Es ist nachteilig, einen am Ende des Rohrpressens stehenbleibenden Pressrest spanabhebend zu bearbeiten, um ein Flanschrohr zu erhalten.From DE-C-92 64 82 it is also known per se to form flanges, collars or the like on pipes by extrusion by leaving a correspondingly thick press residue at the end of pipe pressing. In the method according to DE-C-926482, a different path is followed than in the invention; a front pipe is produced and a circumferential groove is introduced into it, after which a subdivided mouthpiece is inserted into the circumferential groove of the pre-workpiece and a press ram is then set in motion. So two work steps are carried out to produce flanged pipes - at both ends if necessary. It is disadvantageous to machine a press rest that remains at the end of pipe pressing in order to obtain a flange pipe.

Der Erfindung liegt die Aufgabe zugrunde, die Vorrichtung der eingangs genannten Art so weiterzubilden, dass die Umfangskontur des Flansches von der Gestalt der Aufnehmerbohrung unabhängig bleibt. Darüber hinaus soll es möglich werden, das mit dem Flansch versehene Rohr in Pressrichtung abzuziehen.The invention has for its object to develop the device of the type mentioned in such a way that the circumferential contour of the flange remains independent of the shape of the transducer bore. In addition, it should be possible to pull off the pipe provided with the flange in the pressing direction.

Die Lösung dieser Aufgabe wird darin gesehen, dass dem Formgebungsquerschnitt an der Matrize als Formraum für den Flansch eine Kaverne unmittelbar vorgeschaltet ist, deren radiale Erstreckung als Radialmass für den Flansch grösser ist als die Weite des Formgebungsquerschnittes, und dass die kaverne in die zum Blockaufnehmer gerichtete Matrizenfront eingeformt sowie vom Blockaufnehmer und der Stirn des Pressstempels verschliessbar ist.The solution to this problem is seen in the fact that a cavity is placed directly in front of the shaping cross-section on the die as a molding space for the flange, the radial extent of which as a radial dimension for the flange is greater than the width of the shaping cross-section, and that the cavern is in the direction of the block receiver The front of the die is molded in and can be closed by the block receiver and the forehead of the press ram.

Durch die Ausbildung nach der Erfindung formt die Matrize sowohl das Hohlprofil als auch den daran festsitzenden Flansch in seiner gesamten Höhe. Besondere Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Due to the design according to the invention, the die forms both the hollow profile and the flange which is stuck thereon in its entire height. Particular developments of the invention are characterized in the subclaims.

Die Ausbildung nach Anspruch 3 ist besonders dann von Vorteil, wenn Flansche grosser Höhe erzeugt werden sollen.The embodiment according to claim 3 is particularly advantageous when large-height flanges are to be produced.

Dank der Matrizenteilung gemäss Anspruch 4 kann das fertige Hohlprofil mit Flansch aus der Strangpresse in Pressrichtung entnommen werden. Die den Formgebungsquerschnitt begrenzenden, geteilten Flächen sind unter Bildung eines Spaltes um ein Mass auseinanderfahrbar, welches grösser ist als die entsprechende Erstreckung des Flansches, so dass letzterer durch das Werkzeug bzw. die Matrize ausgefahren werden kann. Dass Matrizen von Strangpressen an sich radial geteilt werden können, wird durch die DE-C-92 64 82 angedeutet.Thanks to the die division according to claim 4, the finished hollow profile with flange can be removed from the extrusion press in the pressing direction. The divided surfaces delimiting the shaping cross-section can be moved apart by a gap, forming a gap, which is larger than the corresponding extension of the flange, so that the latter can be extended by the tool or the die. DE-C-92 64 82 indicates that matrices of extrusion presses can be divided radially per se.

Ist der Flansch mehreckig, so verlaufen die Trennflächen der Matrizenteile - und gegenbenenfalls der.diese Matrizenteile enthaltenden Teile eines Werkzeughalters - vorteilhafterweise diagonal durch den Flanschgrundriss, d. h. durch zwei der Grundrissecken. Bevorzugt bestimmen diese Ecken vertikale Trennflächen, was ein seitliches Bewegen der Matrizenteile erlaubt.If the flange is polygonal, the separating surfaces of the die parts - and optionally also the parts of a tool holder containing these die parts - advantageously run diagonally through the flange floor plan, i. H. through two of the floor plan corners. These corners preferably determine vertical dividing surfaces, which allows the die parts to be moved laterally.

Die radial geteilte Matrize wird nach Anspruch 6 während des Pressvorganges von einem sie umgebenden Druckring zusammengehalten, der entweder ein gesondertes Maschinenteil darstellt oder vom Blockaufnehmer gebildet wird.The radially split die is held together during the pressing process by a surrounding pressure ring, which either represents a separate machine part or is formed by the block receiver.

Dazu hat es sich als günstig erwiesen, das dem Blockaufnehmer nahe Ende der Matrize anzufasen, d. h. mit einer Kegelstumpffläche zu versehen, auf die jener Druckring bzw. der dann eine entsprechende Ausnehmung aufweisende Blockaufnehmer aufgeschoben wird. Druckring bzw. Blockaufnehmer sind von ausreichender Stärke, um alle Radialkräfte während des Pressvorganges aufzunehmen. Als Vorzug der konischen Verbindungsflächen zwischen Matrize und Blockaufnehmer bzw. Druckring ist anzusehen, dass die axiale Verbindung leicht herstellbar und wieder zu unterbrechen ist.For this purpose, it has proven to be advantageous to chamfer the end of the die close to the block receiver, i. H. to be provided with a truncated cone surface onto which that pressure ring or the block receiver which then has a corresponding recess is pushed. The pressure ring or block sensor are of sufficient strength to absorb all radial forces during the pressing process. One advantage of the conical connection surfaces between the die and the block receiver or pressure ring is that the axial connection is easy to produce and can be interrupted again.

Da die Konturen der Kaverne die Gestalt des Flansches bestimmen, ist es nach Anspruch 1 auch möglich, den Flansch mit Ringrippen oder dergleichen auszugestalten, wenn entsprechende Formrinnen im Kavernenboden vorhanden sind.Since the contours of the cavern determine the shape of the flange, it is also possible according to claim 1 to design the flange with ring ribs or the like if there are corresponding shaped channels in the cavern floor.

Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung ; diese zeigt in

  • Figur 1 den horizontal gelegten Längsschnitt durch eine Strangpresse während des Herstellens eines Hohlprofiles ;
  • Figur 2 einen vergrößerten Ausschnitt aus Fig. 1 ;
  • Figur 3 einen Teilschnitt durch Fig. 2 nach deren Linie 111-111 ;
  • Figur 4 eine der Fig. 2 entsprechende Wiedergabe eines Teiles der Strangpresse in einer anderen Betriebsstellung ;
  • Figur 5 einen Teilschnitt durch Fig. 4 nach deren Linie V-V:
  • Figuren 6, 7 einen Teil der Fig. 2 entsprechende Darstellungen anderer Ausführungsformen.
Further advantages and details of the invention emerge from the following description of preferred exemplary embodiments and with reference to the drawing; this shows in
  • Figure 1 shows the horizontally placed longitudinal section through an extruder during the manufacture of a hollow profile;
  • FIG. 2 shows an enlarged detail from FIG. 1;
  • Figure 3 is a partial section through Figure 2 along the line 111-111.
  • FIG. 4 shows a representation of a part of the extrusion press corresponding to FIG. 2 in another operating position;
  • 5 shows a partial section through FIG. 4 along the line VV:
  • Figures 6, 7 a part of FIG. 2 corresponding representations of other embodiments.

Vom Preßzylinder 1 einer Strangpresse 2 zum Herstellen von Hohlprofilen 3 eines Außendurchmessers d ragt gemäss Fig. 1 ein hohler Preßstempel 4 in eine Bohrung 5 eines Blockaufnehmers 6. Der maximale Abstand a zwischen der zylinderseitigen Aufnehmerfront 7 und der Preßfläche 8 einer am Preßstempel 4 vorgesehenen Preßscheibe 9 in - nicht dargestellter - Ruhelage des Preßstempels 4 ist so bemessen, daß in dieser Ruhelage der Aufnehmerbohrung 5 ein hohler Bolzen B aus Leichtmetall durch einen Ladeschlitten 11 vorgesetzt werden kann. Ist die Bolzenachse A koaxial zur Pressenachse E ausgerichtet, wird der Bolzen B vom Preßstempel 4 in Preßrichtung x in den Aufnehmer 6 eingeschoben.From the press cylinder 1 of an extrusion press 2 for producing hollow profiles 3 with an outside diameter d, a hollow press die 4 projects into a bore 5 of a block receiver 6 according to FIG. 1. The maximum distance a between the cylinder-side receiver front 7 and the press surface 8 of a press disk provided on the press die 4 9 in - not shown - rest position of the press ram 4 is dimensioned such that in this rest position of the transducer bore 5, a hollow bolt B made of light metal can be inserted through a loading carriage 11. If the pin axis A is aligned coaxially with the press axis E, the pin B is pushed into the receiver 6 by the press ram 4 in the pressing direction x.

In der Pressenachse E verläuft eine die Bohrung 12 des hohlen Preßstempels 4 und den Hohlbolzen B durchsetztende horizontale Dornsäule 14 eines Aussendurchmessers e, die im gewählten Ausführungsbeispiel in Lagern 15 eines Kolbens 16 des PreBzylinders 1 verschieblich ruht. Der Kolben 16 wird durch Kolbenstangen 17 betätigt.In the press axis E runs a bore 12 of the hollow press ram 4 and the hollow pin B horizontal mandrel column 14 of an outer diameter e, which in the selected embodiment rests displaceably in bearings 15 of a piston 16 of the press cylinder 1. The piston 16 is actuated by piston rods 17.

An der dem Preßzylinder 1 fernliegenden Aufnehmerstirn 18 sitzt in einem Werkzeughalter 19 eine Matrize 20 als Formwerkzeug. Der Werkzeughalter 19 stützt sich gegen ein Querhaupt 21 am Pressenausgang ab.On the pick-up face 18 remote from the press cylinder 1, a die 20 is seated in a tool holder 19 as a molding tool. The tool holder 19 is supported against a crosshead 21 at the press exit.

Wie insbesondere Fig. 4, 5 erkennen lassen, sind Werkzeughalter 19 und Matrize 20 am vertikalen Durchmesser D der kreisförmigen Formgebungsquerschnittes oder Matrizendurchbruches 23 geteilt und in Radialrichtung z auseinanderfahrbar ; den Formgebungsquerschnitt 23 begrenzen so zwei Halbringe 24, 24a. Von diesen aus erweitert sich ein Austrittskanal 25 konisch zu einer Durchgangsöffnung 26 des Querhauptes 21 hin.As can be seen in particular in FIGS. 4 and 5, the tool holder 19 and die 20 are divided on the vertical diameter D of the circular shaping cross section or die opening 23 and can be moved apart in the radial direction z; the shaping cross section 23 thus limit two half rings 24, 24 a . From these, an outlet channel 25 widens conically to a through opening 26 of the crosshead 21.

In Preßrichtung x liegt vor dem Matrizendurchbruch 23 in der Matrize 20 eine Einformung 30, deren größte Weite b geringfügig größer ist als der Durchmesser f der Aufnehmerbohrung 5. Die Seitenwände 31 dieser Einformung 30 begrenzen gemäß Fig. 3 einen nahezu quadratischen Grundriß und sind bei einer Ausführungsform geschwungen (31a in Fig. 5). Der Teilungsdurchmesser D bildet eine Diagonale durch zwei einander gegenüberliegende Einformungsecken 32, die somit an den Trennflächen 33 der Matrize 20 liegen. Mit diesen fluchten Trennflächen 34 des mehrteiligen Werkzeughalters 19. Die Trennflächen 34 der Werkzeughalterteile 19a, 19b weisen in Fig. 5 einerseits Zentrierleisten 38 und anderseits diese in Schließlage aufnehmende Zentriernuten 39 auf.In the pressing direction x, an indentation 30 lies in front of the die opening 23 in the die 20, the greatest width b of which is slightly larger than the diameter f of the receiver bore 5. The side walls 31 of this indentation 30 delimit an almost square outline according to FIG. 3 and are one Embodiment curved (31 a in Fig. 5). The pitch diameter D forms a diagonal through two mutually opposite molding corners 32, which are thus located on the parting surfaces 33 of the die 20. With these aligned parting surfaces 34 of the multi-part tool holder 19. The parting surfaces 34 of the tool holder parts 19 a , 19 b in FIG.

Diese Einformung 30 nimmt einen Teil der aus dem Bolzen B entstehenden Matrix B, auf, die während des Preßvorganges zum Hohlprofil 3 geformt wird. Dieses besteht aus einem Rohrteil 35, dessen Innenkontur von der Dornsäule 14 und dessen Außenkontur von den Halbringen 24, 24a des Matrizendurchbruches 23 bestimmt sind, und einem damit einstückig ausgeformten Flansch 36 einer Höhe i. Dieser Flansch 36 entsteht aus dem Preßrest der Matrix B,. Der Abstand dieses Flansches 36 von den Seitenwänden 31 der Einformung 30 ist in Fig. 3 überhöht dargestellt.This indentation 30 receives a part of the matrix B formed from the bolt B, which is formed into the hollow profile 3 during the pressing process. This consists of a tubular part 35, the inner contour of the mandrel column 14 and the outer contour of the half rings 24, 24 a of the die opening 23 are determined, and a flange 36 integrally formed therewith with a height i. This flange 36 arises from the baling residue of the matrix B ,. The distance of this flange 36 from the side walls 31 of the indentation 30 is shown exaggerated in FIG. 3.

Der Flansch 36 kann nach dem restlosen Verpressen des Bolzens B und dem Auseinanderfahren der Matrizenhälften 20a und 20b (Fig. 5) zwischen diesen in Preßrichtung x abgezogen werden. Vor dem Abziehen des stranggepreßten Hohlprofils 3 wird die Dornsäule 14 zurückgefahren, wobei sich Flanschecken 36e gegen die Aufnehmerstirn 18 stützen.The flange 36 can be removed after pressing the bolt B completely and moving the die halves 20 a and 20 b (FIG. 5) between them in the pressing direction x. Before the extruded hollow profile 3 is pulled off, the mandrel column 14 is retracted, flange corners 36 e being supported against the transducer face 18.

Um während des Preßvorganges das Aneinanderliegen der Trennflächen 33 der Matrizenhälften 20a, 20b zu gewährleisten, erweitert sich die Matrize 20 in Preßrichtung x von ihrer Matrizenfront 40 unter Bildung einer kegelstumpfähnlichen Schliessdruckfläche 41 einer Länge n bis zu einer Ringfläche 42, der ein schulterartiger Ringabsatz 43 folgt ; letzterer liegt einer Ringrippe 44 des Werkzeughalters 19 an.In order to ensure that the separating surfaces 33 of the die halves 20 a , 20 b lie against one another during the pressing process, the die 20 expands in the pressing direction x from its die front 40 to form a truncated cone-like closing pressure surface 41 of a length n up to an annular surface 42, which is a shoulder-like ring shoulder 43 follows; the latter abuts an annular rib 44 of the tool holder 19.

In geschlossener Pressstellung der Matrize 20 umfängt die in einem Winkel w von beispielsweise 15° zur Pressenachse E geneigte Schliessdruckfläche 41 eine dazu etwa parallele Druckwand 49 einer zentrischen Ausnehmung 50 des einstückigen Blockaufnehmers 6, wie dies vor allem Fig. 4 verdeutlicht.In the closed pressing position of the die 20, the closing pressure surface 41, which is inclined at an angle w of, for example, 15 ° to the press axis E, encloses an approximately parallel pressure wall 49 of a central recess 50 of the one-piece block receiver 6, as is particularly clear from FIG. 4.

Statt jener Druckwand 49 kann die Schließdruckfläche 41 auch von einem Schließring 51 umfangen sein, welcher einer Nase 52 der Matrize 20 anliegt und dessen Dicke h zumindest der Höhe i des Flansches 36 entspricht.Instead of that pressure wall 49, the closing pressure surface 41 can also be encompassed by a closing ring 51, which abuts a nose 52 of the die 20 and whose thickness h corresponds at least to the height i of the flange 36.

Ein Ausführungsbeispiel der Fig. 7 wird dank einer - von einer Formrippe 46 begrenzten - Formnut 45 der Matrize 20 ein Flansch 36 mit Umfangsrippe 37 erzeugt, wobei der Flansch 36 über die Matrizenfront 40 auskragt ; der auskragende Flanschteil wird in einer Formkaverne 54 der Aufnehmerstirn 18 gebildet, an die in Preßrichtung x die zentrische Aufnehmeröffnung 50 anschließt.An embodiment of FIG. 7 is produced thanks to a shaped groove 45 of the die 20, delimited by a shaped rib 46, a flange 36 with a circumferential rib 37, the flange 36 projecting over the die front 40; the projecting flange part is formed in a shaped cavity 54 of the transducer face 18, to which the central transducer opening 50 connects in the pressing direction x.

Dank dieser Vorrichtung 2 ist es nunmehr möglich, Flanschrohre 3 einstückig zu pressen, die beispielsweise als Rezipienten für Zentrifugen von Uranscheidungsanlagen eingesetzt werden können. Dabei ist die Grundrißform des Flansches 36, welche von der Einformung 30 bestimmt ist. frei wählbar, ebenso der Durchmesser d des Flanschrohres 3. Auch bleibt es den jeweiligen Gegebenheiten überlassen, ob man übliche Hohlbolzen B einsetzt oder diese vorher vergütet. Die Einrichtung zum Lösungsglühen des Bolzens B ist in der Zeichnung nicht wiedergegeben.Thanks to this device 2, it is now possible to press flange tubes 3 in one piece, which can be used, for example, as recipients for centrifuges of uranium separation systems. Here is the outline shape of the flange 36, which is determined by the indentation 30. freely selectable, as well as the diameter d of the flange tube 3. It is also up to the respective circumstances whether conventional hollow bolts B are used or these are tempered beforehand. The device for solution annealing of the bolt B is not shown in the drawing.

Die Dornsäule 14 kann mitlaufend ausgebildet oder feststehender Teil des Preßstempels 4 sein.The mandrel column 14 can be designed to move along or be a fixed part of the press ram 4.

Claims (10)

1. Device for extruding a hollow section (35) from a billet (B), in particular made of light metal, which is advanced in a billet holder (6) to the shaping orifice (23) of a die (20) and introduced into it by means of pressure applied by a ram (4), the hollow section (35) being formed between a mandrel (14) determining its inner contour and the shaping orifice (23) which produces its outer contour, and a flange (36) overlapping the shap- ping orifice (23) in the direction of the ram (4) being formed integrally at the end of the pressing process,
characterised in that immediately in front of the shaping orifice (23) in the die (20), acting as a shaping chamber for the flange (36), is a recess (30) whose radial dimension (b) as the radial measure of the flange (36) is greater than the width (d) of the shaping orifice (23), and the recess (30) is formed in the die face (40) facing towards the billet holder (6) and can be closed off by the billet holder (6) and the face (9) of the ram (4).
2. Device according to claim 1, characterised in that the die portion containing the recess (30) can be detached from the die (20).
3. Device according to claim 1 or 2, characterised in that associated with the recess (30) in the die (20) is a recess (54) in the adjoining face (18) of the holder (6), which extends it in the direction opposite the direction of pressing (x).
4. Device according to any of claims 1 to 3, characterised in that the die (20) is divided into at least two die portions (20a, 20b) radially to the direction of pressing (x), and the surfaces (24, 24a) defining the shaping orifice (23) can be moved apart to form a gap by an amount which is greater than the corresponding radial dimension (b) of the flange (36) or recess (30).
5. Device according to claim 4, characterised in that the side walls (31) of the recess (30) extend in a polygon in outline, and the position of the dividing faces (33) of the die portions (20a, 20b) is determined by two angles (32) of the outline, the dividing face (33) extending preferably vertically through the shaping orifice (23).
6. Device according to at least one of claims 1 to 5, characterised in that associated with the die (20) is a thrust collar (6, 51) which encompasses it in the extruding position.
7. Device according to claims 1 and 6, characterised in that the billet holder (6) is constructed as the thrust collar, and a recess (50) in the billet holder (6) facing towards the die (20) receives the die (20).
8. Device according to at least one of claims 1 to 7, characterised in that the die (20) tapers in a direction opposite the direction of pressing (x), at least in a region close to the die face (40), and this conical region (41) can be inserted in the thrust collar (6, 51) which is preferably at least axially displaceable.
9. Device according to claim 7 or 8, characterised in that the conical regions and surfaces (41 and 49) on the die (20) and thrust collar (6, 51) respectively are inclined at an angle (w) of approximately 5 to 15° to the direction of pressing (x).
10. Device according to at least one of claims 1 to 9, characterised in that shaping grooves (45) are formed in the bottom of the recess (30) in the die (20).
EP83810591A 1982-12-24 1983-12-14 Device for the extrusion of a hollow section Expired EP0114570B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3247977 1982-12-24
DE19823247977 DE3247977A1 (en) 1982-12-24 1982-12-24 METHOD AND DEVICE FOR EXTRUDING A HOLLOW PROFILE

Publications (3)

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EP0114570A2 EP0114570A2 (en) 1984-08-01
EP0114570A3 EP0114570A3 (en) 1984-10-10
EP0114570B1 true EP0114570B1 (en) 1987-07-29

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EP83810591A Expired EP0114570B1 (en) 1982-12-24 1983-12-14 Device for the extrusion of a hollow section

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US (1) US4592224A (en)
EP (1) EP0114570B1 (en)
DE (2) DE3247977A1 (en)

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KR101230752B1 (en) * 2010-12-03 2013-02-06 주식회사 코리아나화장품 Cosmetic Composition comprising Hispidulin or derivative thereof as an active ingredient
CN102716932B (en) * 2010-12-10 2015-06-10 玉环普天单向器有限公司 Mold for fabricating starting gear in gear-reduction starter
US9346089B2 (en) 2012-10-12 2016-05-24 Manchester Copper Products, Llc Extrusion press systems and methods
US9545653B2 (en) 2013-04-25 2017-01-17 Manchester Copper Products, Llc Extrusion press systems and methods

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Also Published As

Publication number Publication date
US4592224A (en) 1986-06-03
DE3372720D1 (en) 1987-09-03
EP0114570A2 (en) 1984-08-01
EP0114570A3 (en) 1984-10-10
DE3247977A1 (en) 1984-07-05

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