EP0300149A2 - Device for leading in a profiled bar in a drawing die - Google Patents

Device for leading in a profiled bar in a drawing die Download PDF

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Publication number
EP0300149A2
EP0300149A2 EP88107282A EP88107282A EP0300149A2 EP 0300149 A2 EP0300149 A2 EP 0300149A2 EP 88107282 A EP88107282 A EP 88107282A EP 88107282 A EP88107282 A EP 88107282A EP 0300149 A2 EP0300149 A2 EP 0300149A2
Authority
EP
European Patent Office
Prior art keywords
drawing die
die
auxiliary
bar
sectional
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
EP88107282A
Other languages
German (de)
French (fr)
Other versions
EP0300149A3 (en
EP0300149B1 (en
Inventor
Rudolf Bültmann
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.)
Bueltmann Monika
Original Assignee
Bueltmann Monika
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 Bueltmann Monika filed Critical Bueltmann Monika
Priority to AT88107282T priority Critical patent/ATE57631T1/en
Publication of EP0300149A2 publication Critical patent/EP0300149A2/en
Publication of EP0300149A3 publication Critical patent/EP0300149A3/en
Application granted granted Critical
Publication of EP0300149B1 publication Critical patent/EP0300149B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21C5/00—Pointing; Push-pointing
    • 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
    • B21C5/00—Pointing; Push-pointing
    • B21C5/003—Pointing; Push-pointing of hollow material, e.g. tube
    • 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
    • B21C5/00—Pointing; Push-pointing
    • B21C5/006—Pointing; Push-pointing of solid material, e.g. wire or profiles

Definitions

  • the task of the innovation consists in a device with which an introduction into the drawing die can be carried out even with rods made of soft metal without loss of material.
  • a drawing bar which can be inserted into the drawing die without being pushed in, can be formed by a stretching process in the case of profiled bars made of soft metal, with no material loss occurring.
  • a waisted deformation is formed at a distance from the end of the bar with the aid of a tool, which corresponds to the desired cross section of the drawing die.
  • the rod is then pulled out of the auxiliary drawing die with a clamping device until the end is free, so that the desired drawing bar is formed up to the end of the rod by this drawing process. It is up to you to determine the length of the drawbar, depending on where the forming tool is attached.
  • the pressures to be used in the deformation are limited, since the deformation is limited to a relatively small rod length.
  • the further invention relates to the special design of a shaping tool with which rectangular cross sections or square cross sections of any size can be formed and which can thus be used universally.
  • this tool can be used in a position close to the actual drawing die for guiding the undeformed rod during the actual drawing process.
  • a waisted deformation is formed on the bar 2 at a distance from the bar end with the aid of an auxiliary drawing die 4.
  • the waisted deformation of the profile bar 2 has the cross section of the desired drawing bar, in the embodiment one Square cross section.
  • the two jaws of the clamping device grip the profile bar in front of the auxiliary drawing die 4 and pull the bar through the auxiliary drawing die to the end, a drawing bar 2a being formed by stretching the material.
  • This deformation can be seen in FIG. 3.
  • the auxiliary drawing die 4 is set so that the drawing die 2a is released so that it can be inserted into the drawing die with the aid of the clamping device 3, as shown in FIG. 4.
  • the auxiliary drawing die 4 can be used as a guide element. For this purpose, it is moved directly in front of the drawing die 1 and the die cross section is adjusted in accordance with the undeformed rod cross section, so that guidance is given in front of the drawing die during the further drawing process.
  • the actual drawing process takes place in a manner known per se, by touching a drawing carriage on drawing die 2a to the left of drawing die 1 and pulling the profile bar through the die.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Earth Drilling (AREA)

Abstract

1. Device having a longitudinally shiftable clamping device (3) for inserting a sectional bar or a sectional tube into a drawing die, characterized by the following features : - in front of a drawing die (1) there is arranged an auxiliary drawing die (4) on the same axis which consists of at least two radially slidable jaws for the formation of a reduced shank diameter of the sectional bar or the sectional tube, respectively : - the longitudinally shiftable clamping device (3) is arranged in front of the auxiliary drawing die (4) ; - the auxiliary drawing die (4) is adjustable by shifting in the drawing direction from a position at a distance from the drawing die to a position directly in front of the drawing die (1), the auxiliary drawing die serving as a guide for the insertion of the shaped sectional bar or sectional tube into the drawing die.

Description

Da Profilstäbe oder Rohre aus weichem Metall, zum Beispiel Aluminium oder Kupfer, nicht direkt in eine Ziehmatrize eingestoßen werden können, ist es erforderlich, durch spanabhebende Bearbeitung eine Ziehangel zu formen, was jedoch mit Werkstoffverlust verbunden ist.Since profiled bars or pipes made of soft metal, for example aluminum or copper, cannot be directly pushed into a drawing die, it is necessary to form a drawbar by machining, but this is associated with material loss.

Die Aufgabe der Neuerung besteht in einer Vorrichtung, mit der auch bei Stäben aus weichem Metall ohne Werkstoffverlust eine Einführung in die Ziehmatrize vorgenommen werden kann.The task of the innovation consists in a device with which an introduction into the drawing die can be carried out even with rods made of soft metal without loss of material.

Diese Aufgabe wird durch eine Vorrichtung mit den Merkmalen nach dem kennzeichnenden Teil des Hauptanspruches gelöst. Die Unteransprüche haben bevorzugte konstruktive Ausführungsformen zum Inhalt.This object is achieved by a device with the features according to the characterizing part of the main claim. The subclaims have preferred constructive embodiments.

Mit Hilfe einer solchen Vorrichtung kann bei Profilstäben aus weichem Metall eine Ziehangel, die ohne Einstoßen in die Ziehmatrize eingeführt werden kann, durch einen Streckvorgang gebildet werden, wobei keinerlei Materialverlust entsteht. Dabei wird zunächst in einem Abstand vom Stangenende mit Hilfe eines Werkzeuges eine taillierte Verformung gebildet, die dem gewünschten Ziehangelquerschnitt entspricht. Sodann wird der Stab mit einer Klemmvorrichtung aus der Hilfsziehmatrize herausgezogen bis das Ende frei ist, so daß sich durch diesen Ziehvorgang die gewünschte Ziehangel bis zum Stabende bildet. Dabei hat man es in der Hand, die Länge der Ziehangel zu bestimmen, je nach dem, wo das Verformungswerkzeug angesetzt wird. Die Drücke, die bei der Verformung anzuwenden sind, halten sich in Grenzen, da die Verformung nur auf einer relativ geringen Stablänge beschränkt ist.With the help of such a device, a drawing bar, which can be inserted into the drawing die without being pushed in, can be formed by a stretching process in the case of profiled bars made of soft metal, with no material loss occurring. First, a waisted deformation is formed at a distance from the end of the bar with the aid of a tool, which corresponds to the desired cross section of the drawing die. The rod is then pulled out of the auxiliary drawing die with a clamping device until the end is free, so that the desired drawing bar is formed up to the end of the rod by this drawing process. It is up to you to determine the length of the drawbar, depending on where the forming tool is attached. The pressures to be used in the deformation are limited, since the deformation is limited to a relatively small rod length.

Die weitere Erfindung hat die spezielle Ausbildung eines Verformungswerkzeuges zum Inhalt, mit dem Rechteckquerschnitte oder Quadratquerschnitte beliebiger Größe geformt werden können und das somit universell eingesetzt werden kann. Im besonderen kann dieses Werkzeug in einer Stellung nahe bei der eigentlichen Ziehmatrize zur Führung des unverformten Stabes während des eigentlichen Ziehvorganges eingesetzt werden.The further invention relates to the special design of a shaping tool with which rectangular cross sections or square cross sections of any size can be formed and which can thus be used universally. In particular, this tool can be used in a position close to the actual drawing die for guiding the undeformed rod during the actual drawing process.

Im folgenden wird ein Ausführungsbeispiel der Erfindung näher beschrieben unter Bezugnahme auf die beiliegenden Zeichnungen.

  • Fig. 1 zeigt in einer Seitenansicht eine Vorrichtung nach der Erfindung, im Prinzip, vor Beginn des Arbeitsganges;
  • Fig. 2 ist eine entsprechende Ansicht nach der Verformung;
  • Fig. 3 zeigt die Stellung der Elemente nach dem Abstrecken;
  • Fig. 4 stellt die Vorrichtung nach dem Einführen der Ziehangel in die Ziehmatrize dar;
  • Fig. 5 ist ein Schnitt nach V-V von Fig. 1;
  • Fig. 6 ist ein Schnitt nach VI-VI von Fig. 2;
  • Fig. 7 ist ein Schnitt nach VII-VII von Fig. 4.
In the following an embodiment of the invention is described in more detail with reference to the accompanying drawings.
  • Fig. 1 shows a side view of a device according to the invention, in principle, before the start of the operation;
  • Fig. 2 is a corresponding view after deformation;
  • Fig. 3 shows the position of the elements after stretching;
  • Fig. 4 shows the device after inserting the drawing die into the drawing die;
  • Fig. 5 is a section on VV of Fig. 1;
  • Fig. 6 is a section along VI-VI of Fig. 2;
  • FIG. 7 is a section according to VII-VII of FIG. 4.

Es geht darum, an einem Profilstab 2 mit quadratischem Querschnitt und aus einem weichen Metall, zum Beispiel Aluminium oder Kupfer bestehend, eine Ziehangel auszubilden, geeignet zum Einführen in eine Ziehmatrize 1, damit diese Ziehangel an der linken Seite von einem Ziehwagen erfaßt werden kann. In einem ersten Arbeitsgang wird an dem Stab 2 mit Abstand vom Stabende eine taillierte Verformung mit Hilfe einer Hilfsziehmatrize 4 gebildet. Die taillierte Verformung des Profilstabes 2 hat den Querschnitt der gewünschten Ziehangel, bei dem Ausführungsbeispiel einen Quadratquerschnitt. Wenn der verkleinerte Querschnitt gebildet ist, dann tritt eine Klemmvorrichtung 3 in Tätigkeit. Die beiden Backen der Klemmvorrichtung erfassen den Profilstab vor der Hilfsziehmatrize 4 und Ziehen den Stab durch die Hilfsziehmatrize bis zum Ende, wobei sich eine Ziehangel 2a durch Strecken des Werkstoffes bildet. Diese Verformung ist aus Fig. 3 ersichtlich. Dann wird die Hilfsziehmatrize 4 so eingestellt, daß die Ziehangel 2a freigegeben wird, so daß sie mit Hilfe der Klemmvorrichtung 3 in die Ziehmatrize eingeführt werden kann, wie Fig. 4 zeigt. Für das weitere Ziehen kann die Hilfsziehmatrize 4 als Führungselement eingesetzt werden. Zu diesem Zweck wird sie unmittelbar vor die Ziehmatrize 1 gefahren und der Matrizenquerschnitt wird entsprechend dem unverformten Stabquerschnitt eingestellt, so daß beim weiteren Ziehvorgang vor der Ziehmatrize eine Führung gegeben ist. Der eigentliche Ziehvorgang geht in an sich bekannter Weise von statten, indem links von der Ziehmatrize 1 ein Zeihwagen an der Ziehangel 2a anfaßt und den Profilstab durch die Matrize zieht.It is a question of forming a drawing bar on a profile bar 2 with a square cross section and consisting of a soft metal, for example aluminum or copper, suitable for insertion into a drawing die 1, so that this drawing bar can be grasped on the left side by a drawing car. In a first step, a waisted deformation is formed on the bar 2 at a distance from the bar end with the aid of an auxiliary drawing die 4. The waisted deformation of the profile bar 2 has the cross section of the desired drawing bar, in the embodiment one Square cross section. When the reduced cross section is formed, a clamping device 3 comes into operation. The two jaws of the clamping device grip the profile bar in front of the auxiliary drawing die 4 and pull the bar through the auxiliary drawing die to the end, a drawing bar 2a being formed by stretching the material. This deformation can be seen in FIG. 3. Then the auxiliary drawing die 4 is set so that the drawing die 2a is released so that it can be inserted into the drawing die with the aid of the clamping device 3, as shown in FIG. 4. For further drawing, the auxiliary drawing die 4 can be used as a guide element. For this purpose, it is moved directly in front of the drawing die 1 and the die cross section is adjusted in accordance with the undeformed rod cross section, so that guidance is given in front of the drawing die during the further drawing process. The actual drawing process takes place in a manner known per se, by touching a drawing carriage on drawing die 2a to the left of drawing die 1 and pulling the profile bar through the die.

Die Hilfsziehmatrize 4 besteht, wie aus Fig. 5 bis 7 hervorgeht, aus vier Werkzeugteilen 4a (Verformungsbacken) von quadratischem oder rechteckigem Querschnitt in einer solchen Anordnung, daß jeweils eine Backenwand zum Teil einen rechteckigen Raum umschließt und zum anderen Teil am benachbarten Backen anliegt. Bei dieser Anordnung ist es möglich, jede Backe in zwei aufeinander senkrecht stehenden Richtungen zu verschieben, wodurch jeder beliebige Rechteck- oder Quadratquerschnitt einstellbar ist.

  • Fig. 5 zeigt die Einstellung der Backen 4a bei der Einführung des Stabendes.
  • Fig. 6 zeigt die Stellung der Backen nach der taillierten Verformung.
  • Fig. 7 zeigt ihre Stellung in der Führungsfunktion.
The auxiliary drawing die 4 consists, as can be seen from FIGS. 5 to 7, of four tool parts 4a (deformation jaws) of square or rectangular cross-section in such an arrangement that one jaw wall in each case partly encloses a rectangular space and the other partly abuts the adjacent jaw. With this arrangement, it is possible to move each jaw in two mutually perpendicular directions, whereby any rectangular or square cross-section can be set.
  • Fig. 5 shows the setting of the jaws 4a when inserting the rod end.
  • Fig. 6 shows the position of the jaws after the waisted deformation.
  • Fig. 7 shows its position in the management function.

Claims (3)

1. Vorrichtung zum Einführen eines Profilstabes (Profilrohres) in eine Ziehmatrize, gekennzeichnet durch die nachfolgenden Merkmale:
- vor einer Ziehmatrize (1), im Abstand von dieser, ist eine Hilfsziehmatrize (4) angeordnet, bestehend aus mindestens zwei Backen zur Bildung einer taillierten Verformung entsprechend dem gewünschten Ziehangelquerschnitt;
- vor der Hilfsziehmatrize (4) ist eine längsverschiebbare Klemmvorrichtung (3) angeordnet.1. Device for inserting a profile rod (profile tube) into a drawing die, characterized by the following features:
- In front of a drawing die (1), at a distance from this, an auxiliary drawing die (4) is arranged, consisting of at least two jaws to form a waisted deformation corresponding to the desired drawing cross section;
- In front of the auxiliary drawing die (4) a longitudinally displaceable clamping device (3) is arranged. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Hilfsziehmatrize (4) aus vier quadratischen oder rechteckigen Backen (4a) besteht, in einer derartigen Anordnung, daß jeweils mit einer Backenwand ein rechteckiger Innenraum gebildet wird und ein Teil der Backenwand an der benachbarten Backe anliegt.2. Device according to claim 1, characterized in that the auxiliary drawing die (4) consists of four square or rectangular jaws (4a), in such an arrangement that a rectangular interior is formed with one jaw wall and a part of the jaw wall on the adjacent one Cheek fits. 3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Hilfsziehmatrize (4) durch Verschiebung in Ziehrichtung unmittelbar vor der Ziehmatrize (1) einstellbar ist.3. Apparatus according to claim 1, characterized in that the auxiliary drawing die (4) is adjustable by displacement in the drawing direction immediately before the drawing die (1).
EP88107282A 1987-07-24 1988-05-06 Device for leading in a profiled bar in a drawing die Expired - Lifetime EP0300149B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107282T ATE57631T1 (en) 1987-07-24 1988-05-06 DEVICE FOR INSERTING A PROFILE BAR INTO A DRAWING DIE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3724472 1987-07-24
DE19873724472 DE3724472A1 (en) 1987-07-24 1987-07-24 DEVICE FOR INSERTING A PROFILE ROD IN A DRAWING MATRICE

Publications (3)

Publication Number Publication Date
EP0300149A2 true EP0300149A2 (en) 1989-01-25
EP0300149A3 EP0300149A3 (en) 1989-07-26
EP0300149B1 EP0300149B1 (en) 1990-10-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107282A Expired - Lifetime EP0300149B1 (en) 1987-07-24 1988-05-06 Device for leading in a profiled bar in a drawing die

Country Status (3)

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EP (1) EP0300149B1 (en)
AT (1) ATE57631T1 (en)
DE (2) DE3724472A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8051694B2 (en) * 2007-02-22 2011-11-08 Honda Motor Co., Ltd. Method of and apparatus for manufacturing shaft
CN108838225A (en) * 2018-08-09 2018-11-20 安陆火凤凰铝材有限责任公司 A kind of aluminum pipe head machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1954575B2 (en) * 1969-10-30 1972-02-17 Fa. Friedr. Krollmann, 5990 Altena FORMING PRESS WITH AT LEAST THREE STAR-SHAPED PRISMATIC PRISM JAWS IN PARTICULAR FOR FINGING PIPES
US3802244A (en) * 1972-12-29 1974-04-09 A Jackman Apparatus and method for pointing wire
DE2951715A1 (en) * 1979-12-19 1981-07-02 Mannesmann AG, 4000 Düsseldorf Tube sizing device - has gliding wedge elements moved by powered piston-cylinder assembly
DE3600700A1 (en) * 1986-01-13 1987-07-23 Rudolf Bueltmann Machine for pushing tube-drawing points (pushpointer)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938785C (en) * 1952-01-10 1956-02-09 Albert Calmes A pulling or pushing bench for pipes directly in front of it, the pull-in device, which is open on both sides and which is to be extended, with the pushing mandrel in a non-positive manner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1954575B2 (en) * 1969-10-30 1972-02-17 Fa. Friedr. Krollmann, 5990 Altena FORMING PRESS WITH AT LEAST THREE STAR-SHAPED PRISMATIC PRISM JAWS IN PARTICULAR FOR FINGING PIPES
US3802244A (en) * 1972-12-29 1974-04-09 A Jackman Apparatus and method for pointing wire
DE2951715A1 (en) * 1979-12-19 1981-07-02 Mannesmann AG, 4000 Düsseldorf Tube sizing device - has gliding wedge elements moved by powered piston-cylinder assembly
DE3600700A1 (en) * 1986-01-13 1987-07-23 Rudolf Bueltmann Machine for pushing tube-drawing points (pushpointer)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8051694B2 (en) * 2007-02-22 2011-11-08 Honda Motor Co., Ltd. Method of and apparatus for manufacturing shaft
CN108838225A (en) * 2018-08-09 2018-11-20 安陆火凤凰铝材有限责任公司 A kind of aluminum pipe head machine

Also Published As

Publication number Publication date
EP0300149A3 (en) 1989-07-26
ATE57631T1 (en) 1990-11-15
DE3860880D1 (en) 1990-11-29
EP0300149B1 (en) 1990-10-24
DE3724472A1 (en) 1989-02-02

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