EP0232257A1 - Process for the production of flanges or collars on hollow parts by lateral extrusion. - Google Patents

Process for the production of flanges or collars on hollow parts by lateral extrusion.

Info

Publication number
EP0232257A1
EP0232257A1 EP85904093A EP85904093A EP0232257A1 EP 0232257 A1 EP0232257 A1 EP 0232257A1 EP 85904093 A EP85904093 A EP 85904093A EP 85904093 A EP85904093 A EP 85904093A EP 0232257 A1 EP0232257 A1 EP 0232257A1
Authority
EP
European Patent Office
Prior art keywords
flanges
support
extrusion
production
plastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85904093A
Other languages
German (de)
French (fr)
Other versions
EP0232257B1 (en
Inventor
Helmut Bogel
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.)
Gesenkschmiede Schneider GmbH
Original Assignee
Gesenkschmiede Schneider GmbH
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 Gesenkschmiede Schneider GmbH filed Critical Gesenkschmiede Schneider GmbH
Publication of EP0232257A1 publication Critical patent/EP0232257A1/en
Application granted granted Critical
Publication of EP0232257B1 publication Critical patent/EP0232257B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K23/00—Making other articles
    • B21K23/04—Making other articles flanged articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/14—Making machine elements fittings

Definitions

  • the invention relates to a method for producing flanges or bundles on hollow bodies which are supported on the inside during cross-extrusion.
  • Flanges formed on hollow bodies have a large number of possible uses, for example as flanges on pipes, for hubs and the like.
  • Cross extrusion as a forming process is defined, for example, according to DIN 8583.
  • Methods and devices for the production of tenons by the transverse extrusion method are known, as is the transverse extrusion of a bundle on solid bodies. It is also known to press gearwheels, using radially movable tool elements from the outside inwards. In cross extrusion, the material flows in the radial direction partly from the outside to the center of the workpiece and partly from the center of the workpiece to the outside.
  • a hollow body with a collar or flange can also be produced by perforating the bottom of the bowl.
  • the length of the hollow body that can be achieved in this way depends, however, on the length-to-diameter ratio (up to approximately 4) depending on the process, that is, until now only hollow parts with a maximum length caused by the process could be produced in this way.
  • the invention has for its object a method for producing. Indicate hollow parts with flange or collar, which permits the production of flanges or collars without crease in the flange or collar region at low manufacturing costs, with no process-related restrictions to the length of the hollow parts flanged occur.
  • the object is achieved in the generic method in that the material in the bore is supported by a plastic medium.
  • the transverse flowing material can be deflected to the outside without forming an internal fold, and the flange can be produced in a single process step.
  • a variable controlled material flow is achieved through the plastic support.
  • Conventionally manufactured parts with pleats which were produced by inexpensive cross-extrusion processes, could only be used for subordinate purposes, since the fold is practically not detectable in the strength calculation and at the same time represents a starting point for cracks under load and the breakage of the component.
  • a plastically and / or elastically deformable mass for example rubber, plastic, soft metal or the like, is used for support.
  • a gas - preferably under high pressure - is used for support.
  • water is used as a support which shows an elastic behavior under pressures in the range from up to 10,000 bar.
  • Both rotationally symmetrical and non-rotationally symmetrical flanges or bundles can be produced by the method according to the invention.
  • the support can also be partially achieved by a mandrel, while the plastic material is used to compensate and to reverse the flow only in the flange area.
  • the forming can be carried out both at room temperature and at higher temperatures.
  • the method can be applied to all materials that can be formed by transverse extrusion and can also form a component of other known forming methods, for example together with the drawing-in method, expanding and
  • the method according to the invention makes it possible for the first time to produce flanges or bundles on hollow bodies by means of transverse extrusion without costly process steps without wrinkling in the interior of the hollow body.
  • Fig. 1 shows a conventional tube with a molded collar 2 with a fold 3. It can be produced by the method according to the invention without a fold in the collar area (Fig. 2).
  • water is pumped under high pressure, i.e. in the range of up to 10,000 bar for support in the cavity during the cross extrusion of a pipe.
  • high pressure i.e. in the range of up to 10,000 bar for support in the cavity during the cross extrusion of a pipe.
  • the forming and liquid pressure is reduced and the finished workpiece can be
  • the forming can also be carried out simultaneously with an expansion of the tube itself during the formation of a bundle, so the original tube diameter of the hollow body 5 in a forming zone 6 is parallel to the forming to produce the bundle 2 in FIG. 2 the final diameter of the pipe part 1 has been expanded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Procédé de production de brides ou de colliers sur des pièces creuses par filage latéral, au cours duquel la pièce creuse est maintenue par l'intérieur, le support utilisé étant constitué d'un moyen élastique et/ou plastique inséré dans la partie creuse de la pièce.Process for the production of flanges or collars on hollow parts by lateral spinning, during which the hollow part is held from the inside, the support used being constituted by an elastic and / or plastic means inserted in the hollow part of the room.

Description

- 1 - 1
'Verfahren zur Herstellung von Flanschen oder Bunden an- Hohlkörpern durch Querfließpressen"'Process for the production of flanges or bundles on hollow bodies by cross extrusion'
B e s c h r e i b u n gDescription
Technisches GebietTechnical field
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Flanschen oder Bunden an Hohlkörpern, die während des Querfließpressens innen abgestützt werden.The invention relates to a method for producing flanges or bundles on hollow bodies which are supported on the inside during cross-extrusion.
An Hohlkörpern ausgeformte Flansche besitzen eine Vielzahl von Anwendungsmoglichkeiten, beispielsweise als Flansche an Rohren, für Naben und ähnliches.Flanges formed on hollow bodies have a large number of possible uses, for example as flanges on pipes, for hubs and the like.
Stand der TechnikState of the art
Das Querfließpressen als Umformverfahren ist beispielsweise nach der DIN 8583 definiert.Cross extrusion as a forming process is defined, for example, according to DIN 8583.
Es sind Verfahren und Vorrichtungen zur Herstellung von Zapfen nach dem Querfließpressverfahren bekannt , wie auch das Querfließpressen eines Bundes an Vollkörpern. Es ist auch bekannt, Zahnräder zu pressen, wobei von außen nach innen radialbewegliche Werkzeugelemente benutzt werden. Beim Querfließpressen fließt der Werkstoff in radialer Richtung teils von außen zur Mitte des Werkstücks und teils von der Werkstückmitte nach außen.Methods and devices for the production of tenons by the transverse extrusion method are known, as is the transverse extrusion of a bundle on solid bodies. It is also known to press gearwheels, using radially movable tool elements from the outside inwards. In cross extrusion, the material flows in the radial direction partly from the outside to the center of the workpiece and partly from the center of the workpiece to the outside.
Die Massivumformung von Vollkörpern aus Stahl durch Quer¬ fließpressen eins Bundes .ist. beispielsweise in der Zeit¬ schrift Draht, 3JL (1984), S. 13 ff. beschrieben. Aus der DE-AS 10 87 433 ist. die Innenabstützung mittels Stempel beim Querfließpressen von Nabenkörpern, insbesondere für Freilaufbremsnaben, bekannt geworden. Bisher war das Querfließpressen von Flanschen oder Bunden an Hohlkörpern insofern nachteilig, als stets an der Ausbildungsstelle des Flansches im Innenraum des Hohlenteils eine Falte entstand. Es ist nun zwar bekanntgeworden, durch eine Kombination aus zweitseitigem Napf- Rückwärts- Flie߬ pressen und Querfließpressen eine Falte zu vermeiden. Auch durch Lochen des Napfbodens ist ein Hohlkörper mit einem Bund oder Flansch herstellbar. Die derart erreichbare Länge des Hohlkörpers ist jedoch von dem ver ahrensbedingten Ver¬ hältnis Länge zu Durchmesser (bis ungefähr 4) abhängig, d.h., bisher konnten auf diese Weise nur Hohlteile mit verfahrens¬ bedingter Maximallänge hergestellt werden.The massive forming of solid bodies made of steel by means of transverse extrusion from one federal government. For example, in the magazine wire, 3JL (1984), pp. 13 ff. From DE-AS 10 87 433 is. the internal support by means of stamps during cross extrusion of hub bodies, in particular for free-wheel brake hubs, has become known. So far, the transverse extrusion of flanges or bundles on hollow bodies has been disadvantageous in that a fold has always occurred at the training site of the flange in the interior of the hollow part. It has now become known to avoid a fold by a combination of double-sided cup backward extrusion presses and cross extrusion presses. A hollow body with a collar or flange can also be produced by perforating the bottom of the bowl. The length of the hollow body that can be achieved in this way depends, however, on the length-to-diameter ratio (up to approximately 4) depending on the process, that is, until now only hollow parts with a maximum length caused by the process could be produced in this way.
Darstellung der ErfindungPresentation of the invention
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Herstellen von. Hohlteilen mit Flansch oder, Bund anzugeben, welches die Herstellung von Flanschen oder Bunden ohne Falte im Flansch oder Bundbereich bei niederen Herstellungskosten ermöglicht, wobei keine verfahrensbedingte Einschränkung der Länge der mit Flanschen versehenen Hohlteile auftreten soll.The invention has for its object a method for producing. Indicate hollow parts with flange or collar, which permits the production of flanges or collars without crease in the flange or collar region at low manufacturing costs, with no process-related restrictions to the length of the hollow parts flanged occur.
Die Aufgabe wird bei dem gattungsgemäßen Verfahren dadurch gelöst, indem der Werkstoff in der Bohrung durch ein plas¬ tisch wirkendes Medium abgestützt wird.The object is achieved in the generic method in that the material in the bore is supported by a plastic medium.
Überraschenderweise kann dadurch, daß eine plastische Innen¬ abstützung des Hohlkörpers während des Querfließpressens erfolgt, eine Umlenkung des querfließenden Materials nach außen erfolgen, ohne Bildung einer inneren Falte, und der Flansch kann in einem einzigen Verfahrenschritt her¬ gestellt werden.Surprisingly, by providing the hollow body with plastic inner support during the transverse extrusion, the transverse flowing material can be deflected to the outside without forming an internal fold, and the flange can be produced in a single process step.
Durch die plastische Abstützung wird ein variabler ge¬ steuerter Stofffluß erzielt. Herkömmlich hergestellte Teile mit Bundfalte, die nach kostengünstigen Querfließpressver¬ fahren hergestellt wurden, konnten nur für untergeordnete Zwecke eingesetzt werden, da die Falte in der Festigkeits¬ rechnung praktisch nicht erfaßbar ist und gleichzeitig eien Ausgangspunkt für Risse bei Belastung und den Bruch des Bauteils darstellt. Bei der bevorzugten Ausführungs¬ form des erfindungsgemäßen Verfahrens wird zur Abstützung eine plastisch und/oder elastisch verformbare Masse, beispielsweise Gummi, Kunststoff, Weichmetall oder ähn¬ liches eingesetzt.A variable controlled material flow is achieved through the plastic support. Conventionally manufactured parts with pleats, which were produced by inexpensive cross-extrusion processes, could only be used for subordinate purposes, since the fold is practically not detectable in the strength calculation and at the same time represents a starting point for cracks under load and the breakage of the component. In the preferred embodiment of the method according to the invention, a plastically and / or elastically deformable mass, for example rubber, plastic, soft metal or the like, is used for support.
Bei einer weiteren bevorzugten Ausführungsform des er¬ findungsgemäßen Verfahrens wird ein Gas - bevorzugt unter Hochdruck - zur Abstützung eingesetzt.In a further preferred embodiment of the method according to the invention, a gas - preferably under high pressure - is used for support.
Bei einer besonders bevorzugten Ausführungsform des er¬ findungsgemäßen Verfahrens wird Wassser als Abstützung eingesetzt, welches unter Drücken im Bereich von bis 10.000 bar ein elastisches Verhalten zeigt.In a particularly preferred embodiment of the method according to the invention, water is used as a support which shows an elastic behavior under pressures in the range from up to 10,000 bar.
Durch das erfindungsgemäße Verfahren können sowohl rota¬ tionssymmetrische als auch nicht rotationssymmetrische Flansche oder Bunde hergestellt werden.Both rotationally symmetrical and non-rotationally symmetrical flanges or bundles can be produced by the method according to the invention.
Die Abstützung kann auch teilweise durch einen Dorn er¬ zielt werden, während nur im Flanschenbereich das plastische Material zum Ausgleich und zur Flußumkehr eingesetzt wird.The support can also be partially achieved by a mandrel, while the plastic material is used to compensate and to reverse the flow only in the flange area.
Das Umformen kann sowohl bei Raumtemperatur als auch bei höheren Temperaturen durchgeführt werden.The forming can be carried out both at room temperature and at higher temperatures.
Das Verfahren ist auf alle durch Querfließpressen umform¬ baren Werkstoffe anwendbar und kann auch einen Bestandteil an sich bekannter anderer Umformverfahren bilden, bei¬ spielsweise gemeinsam mit Einziehverfahren, Aufweiten undThe method can be applied to all materials that can be formed by transverse extrusion and can also form a component of other known forming methods, for example together with the drawing-in method, expanding and
ERSÄTZBLATT ISA/EP- - -SPARE SHEET ISA / EP- - -
ähnlichem eingesetzt werden.similar can be used.
Besonders bevorzugt kann Stahl nach dem erfindungsgemäßen Verfahren querfließgepreßt werden.Steel can particularly preferably be extruded using the method according to the invention.
Durch das erfindungsgemäße Verfahren ist es erstmals möglich, ohne kostenaufwendige Verfahrensschritte durch Querfließpressen Flansche oder Bunde an Hohlkörpern ohne Faltenbildung im Innenraum des Hohlkörpers herzustellen.The method according to the invention makes it possible for the first time to produce flanges or bundles on hollow bodies by means of transverse extrusion without costly process steps without wrinkling in the interior of the hollow body.
Im nachfolgenden wird ein Anwendungsbeispiel anhand der beigefügten Zeichnung näher erläutert.An application example is explained in more detail below with the aid of the attached drawing.
Dabei zeigen:Show:
Fig. 1 einen Schnitt durch ein herkömmliches Verfahrens¬ produkt und1 shows a section through a conventional process product and
Fig. 2 das Angreifen der, Kräfte, die sich im elastischen/ plastischen Medium auf die Innenwände des Hohl¬ körpers beim Querfließpressen auswirken.2 the attack of the forces which have an effect in the elastic / plastic medium on the inner walls of the hollow body during transverse extrusion.
Fig. 1 zeigt ein herkömmliches Rohr mit einem angeformten Bund 2 mit Falte 3. Es kann durch das erfindungsgemäße Verfahren ohne Falte im Bundbereich hergestellt werden (Fig. 2) .Fig. 1 shows a conventional tube with a molded collar 2 with a fold 3. It can be produced by the method according to the invention without a fold in the collar area (Fig. 2).
Bei einer bevorzugten Ausführungsform des erfindungsge¬ mäßen Verfahrens wird Wasser unter hohem Druck, d.h. im Bereich von bis 10.000 bar zur Abstützung in den Hohlraum während des Querfließpressens eines Rohr gespreßt. Dadurch, daß Wasser eine elastische, sich stets den momentanen geometrischen Anforderungen anpassende Abstützung bewirkt, kann die erwünschte Fließrichtung des Materials bei Quer¬ fließpressen erzielt werden.In a preferred embodiment of the process according to the invention, water is pumped under high pressure, i.e. in the range of up to 10,000 bar for support in the cavity during the cross extrusion of a pipe. The fact that water provides an elastic support that always adapts to the current geometric requirements enables the desired flow direction of the material to be achieved in transverse extrusion presses.
Nach beendetem Querfließpressen wird der Umform- und Flüs¬ sigkeitsdruck abgebaut und das fertige Werkstück kann ohneAfter the transverse extrusion has ended, the forming and liquid pressure is reduced and the finished workpiece can be
ERSAT23LÄTT ISA/EP - 5 -ERSAT23LÄTT ISA / EP - 5 -
weitere Nacharbeitung des Inne'nflansches entnommen werden.further reworking of the attachments are removed 'nflansches.
Die Umformung kann auch gleichzeitig mit einer Aufweitung des Rohres selbst während des Anfor en eines Bundes erfolgen, ' so ist in Fig. 2 der ursprüngliche Rohr¬ durchmesser des Hohlkörpers 5 in einer Umformzone 6 , para- lell zur Umformung unter Herstellung des Bundes 2 auf den Enddurchmesser des Rohrteils 1 erweitert worden.The forming can also be carried out simultaneously with an expansion of the tube itself during the formation of a bundle, so the original tube diameter of the hollow body 5 in a forming zone 6 is parallel to the forming to produce the bundle 2 in FIG. 2 the final diameter of the pipe part 1 has been expanded.
Die in der vorstehenden Beschreibung, in den Zeichnungen und den Ansprüchen offenbarten Merkmale der Erfindung können so¬ wohl einzeln auch in beliebiger Kombination für die Verwirk¬ lichung der Erfindung in ihren verschiedenen Ausführungsfor¬ men wesentlich sein. The features of the invention disclosed in the above description, in the drawings and in the claims can be essential, individually or in any combination, for realizing the invention in its various embodiments.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Verfahren zur Herstellung von Flanschen oder Bunden an Hohlkörpern durch Querfließpressen, wobei der Hohlkörper während des Querfließpressens innen abgestützt wird, dadurch gekennzeichnet, daß die Abstützung durch ein elas¬ tisches und/oder plastisches, in den Hohlraum eingebrachtes Medium erfolgt.1. A process for the production of flanges or coils on hollow bodies by means of transverse extrusion, the hollow body being supported on the inside during the transverse extrusion, characterized in that the support is carried out by an elastic and / or plastic medium introduced into the cavity.
2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, daß als plastisches und/oder elas¬ tisches Medium ein festes Medium, wie beispielsweise Gummi, Kunststoff, Weichmetall oder ähnliches eingesetzt wird.2. The method according to claim 1, characterized in that a solid medium such as rubber, plastic, soft metal or the like is used as the plastic and / or elastic medium.
3. Verfahren gemäß Anspruch 1 , dadurch gekennzeichnet, daß als Abstützung ein Gas oder eine Flüssigkeit eingesetzt wird.3. The method according to claim 1, characterized in that a gas or a liquid is used as support.
4. Verfahren gemäß Anspruch 3, dadurch gekennzeichnet, daß als Abstützung Wasser eingesetzt wird.4. The method according to claim 3, characterized in that water is used as a support becomes.
5. Verfahren gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Flansch oder Bund rotations¬ symmetrisch ist.5. The method according to any one of the preceding claims, characterized in that the flange or collar is rotationally symmetrical.
6. Verfahren gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Flansch nicht rotationssym¬ metrisch ist.6. The method according to any one of claims 1 to 4, characterized in that the flange is not rotationally symmetrical.
7. Verfahren gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß zusätzlich zum elastischen Me¬ dium eine Abstützung während des Querfließpressen in den Hohlraum ein Dorn eingeführt wird.7. The method according to any one of the preceding claims, characterized in that, in addition to the elastic medium, a support is inserted into the cavity during the transverse extrusion into the cavity.
8. Verfahren gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Umformen bei erhöhter Tem¬ peratur durchgeführt wird.8. The method according to any one of the preceding claims, characterized in that the forming is carried out at elevated temperature.
9. Verfahren gemäß einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der umzuformende, querfließ- pressbare Werkstoff Stahl ist. 9. The method according to any one of the preceding claims, characterized in that the material to be shaped, cross-flow-pressable is steel.
EP85904093A 1985-08-14 1985-08-14 Process for the production of flanges or collars on hollow parts by lateral extrusion Expired - Lifetime EP0232257B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE1985/000276 WO1987001062A1 (en) 1985-08-14 1985-08-14 Process for the production of flanges or collars on hollow parts by lateral extrusion

Publications (2)

Publication Number Publication Date
EP0232257A1 true EP0232257A1 (en) 1987-08-19
EP0232257B1 EP0232257B1 (en) 1991-05-29

Family

ID=6776124

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85904093A Expired - Lifetime EP0232257B1 (en) 1985-08-14 1985-08-14 Process for the production of flanges or collars on hollow parts by lateral extrusion

Country Status (4)

Country Link
US (1) US4782679A (en)
EP (1) EP0232257B1 (en)
DE (1) DE3583041D1 (en)
WO (1) WO1987001062A1 (en)

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Publication number Priority date Publication date Assignee Title
US5724850A (en) * 1993-03-26 1998-03-10 Honda Giken Kogyo Kabushiki Kaisha Rear fork for a motorcycle
CN1060415C (en) * 1997-04-25 2001-01-10 张应宪 Technological process of manufacturing steel flange blank
US6098437A (en) * 1998-03-20 2000-08-08 The Budd Company Hydroformed control arm
US6209372B1 (en) 1999-09-20 2001-04-03 The Budd Company Internal hydroformed reinforcements
US6523887B1 (en) 1999-11-24 2003-02-25 Magna Interior Systems Inc. Modular roof and headliner assembly
FR2807684B1 (en) * 2000-04-17 2002-07-19 Michel Beffrieu MODULAR TOOL CARRIER
EP2030701A1 (en) * 2007-08-25 2009-03-04 IFUTEC Ingenieurbüro für Umformtechnik GmbH Tool and method for producing a hollow body
DE102010009345B4 (en) 2010-02-25 2011-09-22 Schuler Cartec Gmbh & Co. Kg Method and tool for producing a component and a component produced by deformation

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US203842A (en) * 1878-05-21 Improvement in the methods of bending plumbers traps
US2198643A (en) * 1935-09-28 1940-04-30 W S A Inc Method of and apparatus for making hollow articles
US2138199A (en) * 1935-09-28 1938-11-29 Frans B Wendel Method of making metal fittings and the like
US2200664A (en) * 1937-10-22 1940-05-14 Northern Indiana Brass Co Method of forming hollow metal members
US2168641A (en) * 1938-03-07 1939-08-08 Northern Indiana Brass Co Die mechanism
US2328742A (en) * 1941-02-17 1943-09-07 Thompson Prod Inc Method of making flanged tubing
US2960763A (en) * 1955-10-11 1960-11-22 Reymond M Reichl Method of forging with thin webs
US3286498A (en) * 1964-02-03 1966-11-22 Gen Electric Compressive forming
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Title
See references of WO8701062A1 *

Also Published As

Publication number Publication date
US4782679A (en) 1988-11-08
WO1987001062A1 (en) 1987-02-26
DE3583041D1 (en) 1991-07-04
EP0232257B1 (en) 1991-05-29

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