WO1996030139A1 - Method and device for rounding cans - Google Patents

Method and device for rounding cans Download PDF

Info

Publication number
WO1996030139A1
WO1996030139A1 PCT/EP1996/001172 EP9601172W WO9630139A1 WO 1996030139 A1 WO1996030139 A1 WO 1996030139A1 EP 9601172 W EP9601172 W EP 9601172W WO 9630139 A1 WO9630139 A1 WO 9630139A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
molding
shaping
bushing
die
Prior art date
Application number
PCT/EP1996/001172
Other languages
German (de)
French (fr)
Inventor
Harald Garth
Original Assignee
Krauss-Maffei 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 Krauss-Maffei Ag filed Critical Krauss-Maffei Ag
Priority to EP96908069A priority Critical patent/EP0759822B1/en
Priority to KR1019960706661A priority patent/KR970703207A/en
Priority to JP8528874A priority patent/JPH10501467A/en
Priority to DE59603336T priority patent/DE59603336D1/en
Publication of WO1996030139A1 publication Critical patent/WO1996030139A1/en

Links

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
    • B21D53/00—Making other particular articles
    • B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/10—Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects

Definitions

  • the invention relates to a method for the round bending of bushings, in which a blank is inserted into a gap between a core and a first die, which has a first molding chamber, the inner contour of which is at least approximately complementary to the outer contour of the bushing and extends over at least half the bushing circumference extends that by relatively moving the core into the first mold chamber, the blank is bent approximately in a preform, that by relatively moving the core immersed in the first mold chamber into a second mold chamber of a second die, the two legs of the U-shape are bent Board are deformed into a socket in a final shaping and that the edges of the two molding chambers of the two molding dies open into parallel end face planes of the molding die and these end face planes at least approximate one another in the closed position of both molding chambers.
  • a method of this kind is known. Most round housings, bushings and bearing shells are bent from pre-punched blanks according to this principle, but the result after the final shaping is unsatisfactory, in particular because the roundings are imperfect in the area of the end face planes. Irregularities also occur at the socket ends. Reworking by calibrating the bushes is usually necessary. With the known methods, grinding marks on the sleeve surfaces cannot be avoided and high-quality materials with, for example, multilayer layers, plastic-coated boards and the like cannot be processed by this method without surface damage.
  • the object of the invention is to provide a method and an apparatus for carrying it out, with which or with the blanks can be bent more precisely than before and this bending takes place more gently, so that even sensitive materials can be processed.
  • round bending refers to the bending of rotationally symmetrical objects, such as cylindrical or conical bushings, but is not restricted to this.
  • the bent parts can also have oval, elliptical, teardrop-shaped and similar cross sections.
  • the object is achieved in a method according to the invention of the type mentioned at the outset in that the core is moved deeper into the first molding chamber than it corresponds to the sleeve radius, so that the sleeve axis after the preforming lies at a distance from the die face plane within the first molding chamber.
  • a further development of the invention consists in that the core is also moved deeper into the second mold chamber than it corresponds to the socket radius, so that after the socket has been finally shaped, the socket axis lies within the mold chamber at a distance from the end face plane of the second die.
  • the socket Since the middle of the socket is preferably run over by both end dies from their end planes, the socket is rounded much better in the 90 "and 270" regions than in the known bending process, in which the dies always move exactly to the middle of the socket.
  • at least the core, but preferably also the first die, between the preforming and the final shaping must have a cross section be changed.
  • the device according to the invention offers a solution for this, which will be discussed below.
  • Another important embodiment of the invention is that an auxiliary molding takes place between preforming and final shaping, by means of which only the ends of the U-legs of the board are bent by relative retraction of the core into the second molding chamber in accordance with its curvature, without the between these ends and to bend the U-leg parts lying in the preformed base of the U-shaped blank.
  • the blank is thus transformed into an elongated round profile, which in particular favors the precise rounding of the bush ends.
  • a further embodiment of the invention consists in that the machining of the bushing takes place in two working planes, the preforming, the auxiliary shaping and the final shaping being assigned to the first working plane and the bushing after the final shaping is pushed axially into the second working plane and calibrated there.
  • An important feature of the method in the invention is that before the start of the preforming, the core is given a larger overall cross section by axially retracting an auxiliary core, so that the bushing center can be passed over by at least one of the form punches.
  • This auxiliary core is now used very advantageously according to the invention to push the socket after its final shaping into the second working plane on an expansion sleeve of the calibration station.
  • the invention further relates to a bending device for carrying out the bending process and this device is characterized in that the core and the first molding chamber have a larger cross-section during the pre-molding process than during the final molding process. This feature can be achieved by exchanging the cores.
  • a more advantageous alternative is the use of an auxiliary core, which is temporarily removed for the final shaping.
  • This auxiliary core preferably sits on the core with a concave surface and has a convex working surface which is complementary to the inner surface of the molding chamber.
  • This auxiliary core thus has a crescent-shaped cross section, in which the working surface and the inner surface lie on circular cylinders of the same size.
  • the first die preferably supports a slide which is displaceable in the direction of the bushing and which forms part of the first molding chamber, and on this slide the end face of the molding chamber is formed, which defines the parting plane of the die, during preforming and intermediate or auxiliary molding.
  • This division plane is then at a distance from the center of the bush on the side of the first die.
  • the auxiliary core can now be connected to the slide to form a jointly displaceable structural unit, so that after this structural unit has been removed from the first working level, the core and the first molding chamber for the final shaping of the bushing receive new cross-sectional shapes, so that the unchanged second shaping die receives the center of the bushing can run over for the final shaping of the socket.
  • the method according to the invention allows the boards to be connected to the carrier strip via two webs which are assigned to the end regions of the board.
  • the board can therefore be positioned more precisely in the bending device. Since these webs after separation from Carrier strips leave end-side shear marks on the socket, the sockets produced according to the invention differ from the prior art in that these shear marks are located in the quarters adjacent to the socket gap.
  • the three-step bending process by changing the core and mold chamber cross-sections ultimately leads to a gentle and very precise round bending of blanks, so that the method according to the invention is also suitable for highly sensitive layered board materials.
  • the two mold stamps of the device according to the invention have a width at least equal to twice the width of the bushing to be bent and each have a calibration chamber axially next to their mold chambers, with both calibration chambers having the same mirror image, the curvature of which corresponds to that of the associated mold chambers, but are identical only extend over a circumferential angle of 180 °.
  • the two calibration chambers form a circumferentially closed calibration cavity corresponding to the outer surface of the socket.
  • a spreading device which preferably consists of an expansion sleeve, which can be widened or narrowed by an internal cone by axially displacing an actuating rod.
  • FIG. 1 - FIG. 6 The bending device with the plate to be bent in successive work processes
  • FIG. 7 - FIG. 12 cross-sections through the bending device, in the work processes assigned to the respective views.
  • the auxiliary core 18 and the slide 20 form a structural unit which is pushed back and forth in the direction of arrow A (FIG. 10) by an actuating tool, not shown.
  • the first molding die 12 has a molding chamber 22 with a semi-cylindrical bottom in the form of a cylinder section. In the area of the slide 20, the part-cylindrical inner surface of the molding chamber 22 continues continuously into a semi-cylindrical surface and opens out with parallel inner surface sections at the end face plane 23 of the first molding die 12.
  • the second molding die 1 4 consists of two die halves 1 4a and 1 4b, which together form a second molding chamber 24. This is approximately mirror-inverted to the molding chamber 22 and, apart from a step between the two stamp parts 14a and 14b, has a semi-cylindrical contour, to which parallel inner surface sections pointing downward adjoin.
  • the stamp part 1 4b is vertically displaceably mounted on the stamp part 14a and is biased by means of a spring 1 5, which is illustrated only schematically here, against a stop of the stamp part 1 4a in such a way that a step 17 is formed in the mold chamber 24 in its central plane.
  • the two form stamps 12, 14 have moved apart.
  • the core 16 is stationary.
  • a board 26 is inserted into the gap between the core 1 6 and the end face of the first die 1 2.
  • the form stamp 12 then moves upwards in the direction of the arrow according to FIG. 1 and bends the board 26 into a U shape as shown in FIG. 2 is shown.
  • the core center which corresponds to the center of the bushing, lies below the end face 23 of the first die 1 2.
  • the core 1 6 has thus entered the molding chamber 22 deeper than it corresponds to the bushing radius.
  • the 90 ° and 270 ° positions of the socket to be formed are thus in the molding chamber 22, so that the U-legs of the plate 26 formed do not spring outwards, but lie closely against the auxiliary core 18.
  • the preforming process of the board 26 is thus ended.
  • the second die 1 4 moves according to FIG. 3 down.
  • the ends 26 'of the U-legs of the blank blank are bent inwards when they come into contact with the mold chamber wall 24 and lie on the auxiliary stamp 18 when the mold stamp 14 is placed on it.
  • the straightness of the U-legs of the blank 26 is preserved. Due to the stage 17 in the molding chamber 24, the bending of the two leg ends 26 'takes place with a slight time offset.
  • the bending of the two leg ends 26 'between the second die 14 and the auxiliary core 18 represents an intermediate auxiliary shaping, according to which these leg ends 26' are bent exactly in a circular cylindrical manner and thus already have their final shape.
  • the auxiliary core 1 8 is pulled together with the slide 20 in the direction of arrow A (FIG. 10) axially between the shaping dies 1 2, 14, for which purpose the second shaping punch 1 4 is possibly lifted somewhat.
  • the second die 1 4 moves downward again to bring about the final shaping of the bushing 27.
  • the die 1 4 can extend deeper beyond the end face 23 of the first die 1 1 to the bottom surface 28 of the die 1 2, the end face 1 9 of the second die 1 4
  • the core center travels downward until the inner surface of the molding chamber 24 likewise deforms the socket blank at its straight U-leg sections in a circular-cylindrical manner, thus completing the final shaping of the socket 27.
  • the socket ends are usually interlocked.
  • the bush edges have mutually engaging projections and recesses. Since the stamp half 1 4b first presses one socket edge against the core 16, the form-fitting closing of the socket 27 can take place during the last phase of the downward movement of the stamp part 14a. Both stamps 1 2 and 14 then move apart (FIG. 5), so that the finished bushing 27 can be stripped from the core 1 6.
  • Figures 7 to 1 2 illustrate an additional calibration process of the bushing 27, which takes place in the same device 10 on a second working level.
  • tool parts 30, 32 are attached to the two mold punches 1 2, 1 4 on the right, each having calibration chambers 34, 36, which have the same curvatures as the mold chambers 22, 24, but each only extend over a circumferential angle of 180 °.
  • the division plane of the calibration chambers 34, 36 thus lies at the core center.
  • the hollow core 1 6 is penetrated by an operating rod 38 which carries a cone 40 in the second working plane, which is surrounded by an expansion sleeve 42.
  • the structural unit consisting of auxiliary core 1 8 and slide 20 is now pushed back into the first working level after final shaping of the bushing 27, whereby the auxiliary core 18 inserts the bushing 27 on the core 16 into the second working level via the expansion sleeve 42 pushes.
  • the socket 27 calibrated there in the previous work cycle is simultaneously pushed out of the device 10 (FIG. 12).
  • the device 10 is then prepared in the first working level for receiving a new board 26.
  • the work processes of preforming, intermediate shaping and final shaping of the bushing 27 are repeated and in the position according to FIGS. 4 and 10 the two tools 30, 32 are closed and form a cylindrical calibration cavity which encloses the bushing 27.
  • the actuating rod 38 is pulled in the direction of the arrow A (FIG. 10), as a result of which the expansion sleeve 42 is expanded by the action of the cone 40 and the bushing 27 is calibrated.
  • a board 26 is thus bent and closed with high precision in a first working level without any handling devices and calibrated in the second working level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Forging (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Closures For Containers (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

The invention concerns a rounding device (10) comprising two shaping dies (12, 14) with shaping chambers (22, 24) in order to round a sheet bar (26) about a core (16). The peripheral lengths of the two shaping chambers (22, 24) are each longer than half the can length. During a shaping step, the core (16) penetrates a first shaping chamber (22) by a depth which is greater than the can radius. The sheet bar (26) is thus shaped in the form of a U. In an intermediate shaping stage, an auxiliary core (18) is placed on the core (16) such that, as the second shaping die (14) moves downwards, only the ends of the U-legs of the sheet bar blank (26) are shaped arcuately. When the auxiliary core (18) and part (20) of the first shaping die (12) have been removed, the final can shaping process occurs, in which the second shaping die (14) likewise travels over the centre of the can. The three-stage rounding method enables cans to be rounded highly accurately and carefully.

Description

"Verfahren und Vorrichtung zum Rundbiegen von Buchsen " "Method and device for bending bushes"
BESCHREIBUNGDESCRIPTION
Die Erfindung betrifft ein Verfahren zum Rundbiegen von Buchsen, bei dem eine Platine in einen Spalt zwischen einem Kern und einem ersten Formstempel eingelegt wird, der eine erste Formkammer aufweist, deren Innenkontur zur Außenkontur der Buchse wenigstens angenähert komplementär ist und sich über mindestens den halben Buchsenumfang erstreckt, daß durch relatives Einfahren des Kerns in die erste Formkammer die Platine in einer Vorformung etwa U-förmig gebogen wird, daß durch relatives Einfahren des in der ersten Formkammer eingetauchten Kerns in eine zweite Formkammer eines zweiten Formstempels die beiden Schenkel der U-förmig gebogenen Platine in einer Endformung zu einer Buchse verformt werden und daß die Ränder beider Formkammern der beiden Formstempel in parallelen Stirnflächenebenen der Formstempel münden und diese Stirnflächenebenen einander in der geschlossenen Stellung beider Formkammern wenigstens angenähert berühren.The invention relates to a method for the round bending of bushings, in which a blank is inserted into a gap between a core and a first die, which has a first molding chamber, the inner contour of which is at least approximately complementary to the outer contour of the bushing and extends over at least half the bushing circumference extends that by relatively moving the core into the first mold chamber, the blank is bent approximately in a preform, that by relatively moving the core immersed in the first mold chamber into a second mold chamber of a second die, the two legs of the U-shape are bent Board are deformed into a socket in a final shaping and that the edges of the two molding chambers of the two molding dies open into parallel end face planes of the molding die and these end face planes at least approximate one another in the closed position of both molding chambers.
Ein Verfahren dieser Art ist bekannt. Die meisten Rundgehäuse, Buchsen und Lagerschalen werden nach diesem Prinzip aus vorgestanzten Platinen gebogen, allerdings ist das Ergebnis nach der Endformung unbefriedigend, insbesondere weil im Bereich der Stirnflächenebenen der Formstempel die Rundungen unvollkommen sind. Irregularitäten treten auch an den Buchsenenden auf. Eine Nachbearbeitung durch Kallibrieren der Buchsen ist in der Regel erforderlich. Mit den bekannten Verfahren sind auch Schleifmarken an den Buchsenoberflächen nicht zu vermeiden und hochwertige Materialien mit z.B. mehrschichtigen Lagen, kunststoffbeschichtete Platinen und dergl. sind nach diesem Verfahren ohne Oberflächenbeschädigungen nicht verarbeitbar. Aufgabe der Erfindung ist es, ein Verfahren und eine Vorrichtung zu dessen Durchführung zu schaffen, mit dem bzw. mit der Platinen genauer als bisher rundgebogen werden können und dieses Biegen schonender erfolgt, sodaß auch empfindliche Materialien verarbeitet werden können.A method of this kind is known. Most round housings, bushings and bearing shells are bent from pre-punched blanks according to this principle, but the result after the final shaping is unsatisfactory, in particular because the roundings are imperfect in the area of the end face planes. Irregularities also occur at the socket ends. Reworking by calibrating the bushes is usually necessary. With the known methods, grinding marks on the sleeve surfaces cannot be avoided and high-quality materials with, for example, multilayer layers, plastic-coated boards and the like cannot be processed by this method without surface damage. The object of the invention is to provide a method and an apparatus for carrying it out, with which or with the blanks can be bent more precisely than before and this bending takes place more gently, so that even sensitive materials can be processed.
Das Rundbiegen bezieht sich in den meisten Anwendungsfällen auf das Biegen rotationssymmetrischer Gegenstände, wie zylindrischer oder konischer Buchsen, ist darauf aber nicht beschränkt. Die Biegeteile können auch ovale, elliptische, tropfenförmige und ähnliche Querschnitte aufweisen.In most applications, round bending refers to the bending of rotationally symmetrical objects, such as cylindrical or conical bushings, but is not restricted to this. The bent parts can also have oval, elliptical, teardrop-shaped and similar cross sections.
Die Aufgabe wird bei einem erfindungsgemäßen Verfahren der eingangs genannten Art dadurch gelöst, daß der Kern in die erste Formkammer tiefer eingefahren wird als es dem Buchsenradius entspricht, sodaß die Buchsenachse nach der Vorformung im Abstand von der Formstempel-Stirnflächenebene innerhalb der ersten Formkammer liegt.The object is achieved in a method according to the invention of the type mentioned at the outset in that the core is moved deeper into the first molding chamber than it corresponds to the sleeve radius, so that the sleeve axis after the preforming lies at a distance from the die face plane within the first molding chamber.
Eine Weiterbildung der Erfindung besteht darin, daß der Kern auch in die zweite Formkammer tiefer eingefahren wird als es dem Buchsenradius entspricht, sodaß die Buchsenachse nach Endformung der Buchse im Abstand von der Stirnflächenebene des zweiten Formstempels innerhalb dessen Formkammer liegt.A further development of the invention consists in that the core is also moved deeper into the second mold chamber than it corresponds to the socket radius, so that after the socket has been finally shaped, the socket axis lies within the mold chamber at a distance from the end face plane of the second die.
Da die Buchsenmitte vorzugsweise beider Formstempel von deren Stirnebenen jeweils überfahren werden, wird die Buchse im 90 " -Bereich und im 270 "-Bereich wesentlich besser gerundet als nach dem bekannten Biegeverfahren, bei dem die Formstempel jeweils genau bis auf die Buchsenmittenebene fahren. Um dieses Verfahren durchzuführen, müssen mindestens der Kern, vorzugsweise aber auch der erste Formstempel zwischen Vorformung und Endformung im Querschnitt geändert werden. Dafür bietet die erfindungsgemäße Vorrichtung eine Lösung an, auf die nachstehend eingegangen wird.Since the middle of the socket is preferably run over by both end dies from their end planes, the socket is rounded much better in the 90 "and 270" regions than in the known bending process, in which the dies always move exactly to the middle of the socket. In order to carry out this method, at least the core, but preferably also the first die, between the preforming and the final shaping must have a cross section be changed. The device according to the invention offers a solution for this, which will be discussed below.
Eine weitere wichtige Ausgestaltung der Erfindung besteht darin, daß zwischen Vorformung und Endformung eine Hilfsformung erfolgt, durch die lediglich die Enden der U-Schenkel der Platine durch relatives Einfahren des Kerns in die zweite Formkammer entsprechend deren Wölbung gebogen werden, ohne die zwischen diesen Enden und der in der Vorformung gewölbten Basis des U-förmigen Platinenrohlings liegenden U-Schenkelteile mitzubiegen. In dieser Zwischenformungsstufe wird der Rohling also in ein gestrecktes Rundprofil verwandelt, wodurch insbesondere das präzise Runden der Buchsenenden begünstigt wird.Another important embodiment of the invention is that an auxiliary molding takes place between preforming and final shaping, by means of which only the ends of the U-legs of the board are bent by relative retraction of the core into the second molding chamber in accordance with its curvature, without the between these ends and to bend the U-leg parts lying in the preformed base of the U-shaped blank. In this intermediate forming stage, the blank is thus transformed into an elongated round profile, which in particular favors the precise rounding of the bush ends.
Obwohl mit dem erfindungsgemäßen Verfahren ein hochgenaues Rundbiegen von Buchsen möglich ist, besteht eine weitere Ausgestaltung der Erfindung darin, daß die Bearbeitung der Buchse in zwei Arbeitsebenen erfolgt, wobei das Vorformen, das Hilfsformen und das Endformen der ersten Arbeitsebene zugewiesen sind und daß die Buchse nach der Endformung axial in die zweite Arbeitsebene geschoben und dort kalibriert wird.Although with the method according to the invention a highly precise round bending of bushings is possible, a further embodiment of the invention consists in that the machining of the bushing takes place in two working planes, the preforming, the auxiliary shaping and the final shaping being assigned to the first working plane and the bushing after the final shaping is pushed axially into the second working plane and calibrated there.
Ein wichtiges Verfahrensmerkmal besteht bei der Erfindung noch darin, daß vor Beginn der Vorformung der Kern durch axiales Einfahren eines Hilfskernes einen größeren Gesamtquerschnitt erhält, sodaß das Überfahren der Buchsenmitte durch mindestens einen der Formstempel ermöglicht wird. Dieser Hilfskern wird nun erfindungsgemäß sehr vorteilhaft dazu verwendet, die Buchse nach ihrer Endformung in die zweite Arbeitsebene auf eine Spreizhülse der Kalibrierstation zu schieben. Die Erfindung betrifft weiterhin eine Biegevorrichtung zur Durchführung des Biegeverfahrens und diese Vorrichtung ist dadurch gekennzeichnet, daß der Kern und die erste Formkammer während des Vorformungsvorganges einen größeren Querschnitt aufweisen als während des Endformungsvorganges. Dieses Merkmal läßt sich durch Austauschen der Kerne realisieren. Eine vorteilhaftere Alternative ist der Einsatz eines Hilskernes, der für die Endformung vorübergehend entfernt wird. Dieser Hilfskern sitzt vorzugsweise mit einer konkaven Fläche auf dem Kern auf und besitzt eine konvexe Arbeitsfläche, die zur Formkammerinnenfläche komplementär ist. Dieser Hilfskern hat also einen sichelförmigen Querschnitt, bei dem die Arbeitsfläche und die Innenfläche auf gleich großen Kreiszylindern liegen.An important feature of the method in the invention is that before the start of the preforming, the core is given a larger overall cross section by axially retracting an auxiliary core, so that the bushing center can be passed over by at least one of the form punches. This auxiliary core is now used very advantageously according to the invention to push the socket after its final shaping into the second working plane on an expansion sleeve of the calibration station. The invention further relates to a bending device for carrying out the bending process and this device is characterized in that the core and the first molding chamber have a larger cross-section during the pre-molding process than during the final molding process. This feature can be achieved by exchanging the cores. A more advantageous alternative is the use of an auxiliary core, which is temporarily removed for the final shaping. This auxiliary core preferably sits on the core with a concave surface and has a convex working surface which is complementary to the inner surface of the molding chamber. This auxiliary core thus has a crescent-shaped cross section, in which the working surface and the inner surface lie on circular cylinders of the same size.
Der erste Formstempel lagert vorzugsweise einen in Buchsenachsrichtung verschiebbaren Schieber, der einen Teil der ersten Formkammer bildet und an diesem Schieber ist die Formkammerstirnfläche ausgebildet, die die Teilungsebene der Formstempel während der Vorformung und der Zwischen- oder Hilfsformung definiert. Diese Teilungsebene liegt dann im Abstand von der Buchsenmitte auf der Seite des ersten Formstempels. In sehr vorteilhafter Weise läßt sich nun der Hilfskern mit dem Schieber zu einer gemeinsam verschiebbaren Baueinheit verbinden, sodaß nach Wegziehen dieser Baueinheit aus der ersten Arbeitsebene der Kern und die erste Formkammer für die Endformung der Buchse neue Querschnitssformen erhalten, sodaß der unveränderte zweite Formstempel die Buchsenmitte für die Endformung der Buchse überfahren kann.The first die preferably supports a slide which is displaceable in the direction of the bushing and which forms part of the first molding chamber, and on this slide the end face of the molding chamber is formed, which defines the parting plane of the die, during preforming and intermediate or auxiliary molding. This division plane is then at a distance from the center of the bush on the side of the first die. In a very advantageous manner, the auxiliary core can now be connected to the slide to form a jointly displaceable structural unit, so that after this structural unit has been removed from the first working level, the core and the first molding chamber for the final shaping of the bushing receive new cross-sectional shapes, so that the unchanged second shaping die receives the center of the bushing can run over for the final shaping of the socket.
Während nach dem Stand der Technik kleinere Platinen mittig über einen Steg an einem Trägerstreifen hängen, erlaubt das erfindungsgemäße Verfahren die Anbindung der Platinen an den Trägerstreifen über zwei Stege, die den Endbereichen der Platine zugeordnet sind. Die Platine kann daher genauer in der Biegevorrichtung positioniert werden. Da diese Stege nach dem Abtrennen vom Trägerstreifen stirnseitige Abschermarken an der Buchse hinterlassen, unterscheiden sich die erfindungsgemäß hergestellten Buchsen vom Stand der Technik dadurch, daß sich diese Abschermarken in den an den Buchsenspalt angrenzenden Viertel umfangen befinden.While, according to the prior art, smaller boards hang in the middle of a web on a carrier strip, the method according to the invention allows the boards to be connected to the carrier strip via two webs which are assigned to the end regions of the board. The board can therefore be positioned more precisely in the bending device. Since these webs after separation from Carrier strips leave end-side shear marks on the socket, the sockets produced according to the invention differ from the prior art in that these shear marks are located in the quarters adjacent to the socket gap.
Das dreischrittige Biegeverfahren unter Veränderung der Kern- und Formkammerquerschnitte führt letztendlich zu einer schonenden und sehr genauen Rundbiegung von Platinen, sodaß das erfindungsgemäße Verfahren auch für hochempfindliche Schichtplatinenstoffe geeignet ist.The three-step bending process by changing the core and mold chamber cross-sections ultimately leads to a gentle and very precise round bending of blanks, so that the method according to the invention is also suitable for highly sensitive layered board materials.
Die beiden Formstempel der erfindungsgemäßen Vorrichtung haben einen Breite mindestens gleich der doppelten Breite der zu biegenden Buchse und weisen axial neben ihren Formkammern jeweils eine Kalibrierkammer auf, wobei beide Kalibrierkammern spiegelbildlich gleich ausgebildet sind, in ihrer Wölbung mit derjenigen der zugeordneten Formkammern übereinstimmen, sich aber jeweils nur über einen Umfangswinkel von 180° erstrecken. Die beiden Kalibrierkammern bilden einen umfangsgeschlossenen Kalibrierhohlraum entsprechend der Außenmantelfläche der Buchse. In diesem Kalibrierhohlraum befindet sich eine Spreizeinrichtung, die vorzugsweise aus einer Spreizhülse besteht, die von einem innenliegenden Konus durch Axialverschieben einer Betätigungsstange geweitet oder verengt werden kann.The two mold stamps of the device according to the invention have a width at least equal to twice the width of the bushing to be bent and each have a calibration chamber axially next to their mold chambers, with both calibration chambers having the same mirror image, the curvature of which corresponds to that of the associated mold chambers, but are identical only extend over a circumferential angle of 180 °. The two calibration chambers form a circumferentially closed calibration cavity corresponding to the outer surface of the socket. In this calibration cavity there is a spreading device, which preferably consists of an expansion sleeve, which can be widened or narrowed by an internal cone by axially displacing an actuating rod.
Mit dieser Weiterbildung wird zusätzlich zu dem Vorteil einer Buchsenbiegung in ein und demselben Werkzeug eine Kalibrierung in einer zweiten Arbeitsebene dieses Werkzeugs erzielt, sodaß ein mehrfaches Entnehmen und Einlegen von Platinen und Buchsenrohlingen und die damit verbunden Ungenauigkeiten entfallen. Anhand der Zeichnung, die ein Ausführungsbeispiel darstellt, wird die Erfindung näher beschrieben.With this development, in addition to the advantage of a socket bend in one and the same tool, calibration is achieved in a second working plane of this tool, so that multiple removal and insertion of circuit boards and socket blanks and the associated inaccuracies are eliminated. The invention is described in more detail with reference to the drawing, which represents an exemplary embodiment.
Es zeigen:Show it:
FIG. 1 - FIG. 6 Die Biegevorrichtung mit der zu biegenden Platine in nacheinander erfolgenden Arbeitsabläufen, undFIG. 1 - FIG. 6 The bending device with the plate to be bent in successive work processes, and
FIG. 7 - FIG. 12 Querschnitte durch die Biegevorrichtung, in den, den jeweiligen Ansichten zugeordneten Arbeitsabläufen.FIG. 7 - FIG. 12 cross-sections through the bending device, in the work processes assigned to the respective views.
Die Figuren veranschaulichen schematisch Vorrichtungsteile einer Biegevorrichtung 10, die einen ersten Formstempel 1 2, einen zweiten Formstempel 1 4, einen kreiszylindrischen hohlen Kern 16, einen Hilfskern 1 8 und einen am ersten Formstempel 1 2 in Achsrichtung des Kerns 16 verschiebbar gelagerten Schieber 20 aufweist. Der Hilfskem 18 und der Schieber 20 bilden eine Baueinheit, die von einem nicht dargestellten Betätigungswerkzeug in Richtung des Pfeiles A (FIG. 10) hin- und hergeschoben wird. Der erste Formstempel 12 weist eine Formkammer 22 auf mit einem teiizylindrischen Boden in Form eines Zylinderabschnittes. Im Bereich des Schiebers 20 setzt sich die teilzylindrische Innenfläche der Formkammer 22 stetig in eine halbzylindrische Fläche fort und mündet mit parallelen Innenflächenabschnitten an der Stirnflächenebene 23 des ersten Formstempels 12.The figures schematically illustrate device parts of a bending device 10, which has a first form punch 1 2, a second form punch 1 4, a circular cylindrical hollow core 16, an auxiliary core 1 8 and a slide 20 mounted on the first form punch 1 2 in the axial direction of the core 16. The auxiliary core 18 and the slide 20 form a structural unit which is pushed back and forth in the direction of arrow A (FIG. 10) by an actuating tool, not shown. The first molding die 12 has a molding chamber 22 with a semi-cylindrical bottom in the form of a cylinder section. In the area of the slide 20, the part-cylindrical inner surface of the molding chamber 22 continues continuously into a semi-cylindrical surface and opens out with parallel inner surface sections at the end face plane 23 of the first molding die 12.
Der zweite Formstempel 1 4 besteht aus zwei Stempelhälften 1 4a und 1 4b, die zusammen eine zweite Formkammer 24 bilden. Diese ist angenähert spiegelbildlich zur Formkammer 22 ausgebildet und hat abgesehen von einer Stufe zwischen den beiden Stempelteilen 14a und 14b eine halbzylindrische Kontur, an die sich abwärtsweisende parallele Innenflächenabschnitte anschließen. Das Stempelteil 1 4b ist am Stempelteil 14a lotrecht verschiebbar gelagert und wird mittels einer Feder 1 5, die hier nur schematisch veranschaulicht ist gegen einen Anschlag des Stempelteils 1 4a derart vorgespannt, daß in der Formkammer 24 in deren Mittelebene eine Stufe 17 entsteht.The second molding die 1 4 consists of two die halves 1 4a and 1 4b, which together form a second molding chamber 24. This is approximately mirror-inverted to the molding chamber 22 and, apart from a step between the two stamp parts 14a and 14b, has a semi-cylindrical contour, to which parallel inner surface sections pointing downward adjoin. The stamp part 1 4b is vertically displaceably mounted on the stamp part 14a and is biased by means of a spring 1 5, which is illustrated only schematically here, against a stop of the stamp part 1 4a in such a way that a step 17 is formed in the mold chamber 24 in its central plane.
In FIG. 1 sind die beiden Formstempel 12, 14 auseinandergefahren. Der Kern 16 ist stationär gelagert. In den Spalt zwischen Kern 1 6 und Stirnfläche des ersten Formstempels 1 2 ist eine Platine 26 eingeschoben. Der Formstempel 12 fährt dann aufwärts in Richtung des Pfeiles gemäß FIG. 1 und biegt die Platine 26 in eine U-Form, wie in FIG. 2 gezeigt ist. Das Kernzentrum, das der Buchsenmitte entspricht, liegt unterhalb der Stirnfläche 23 des ersten Formstempels 1 2. Der Kern 1 6 ist damit tiefer in die Formkammer 22 eingetreten, als es dem Buchsenradius entspricht. Die 90°- und 270°-Stellen der zu bildenden Buchse liegen somit in der Formkammer 22, sodaß die gebildeten U-Schenkel der Platine 26 nicht nach außen federn, sondern am Hilfskern 18 eng anliegen. Der Vorformungsvorgang der Platine 26 ist damit beendet.In FIG. 1, the two form stamps 12, 14 have moved apart. The core 16 is stationary. A board 26 is inserted into the gap between the core 1 6 and the end face of the first die 1 2. The form stamp 12 then moves upwards in the direction of the arrow according to FIG. 1 and bends the board 26 into a U shape as shown in FIG. 2 is shown. The core center, which corresponds to the center of the bushing, lies below the end face 23 of the first die 1 2. The core 1 6 has thus entered the molding chamber 22 deeper than it corresponds to the bushing radius. The 90 ° and 270 ° positions of the socket to be formed are thus in the molding chamber 22, so that the U-legs of the plate 26 formed do not spring outwards, but lie closely against the auxiliary core 18. The preforming process of the board 26 is thus ended.
Nun fährt der zweite Formstempel 1 4 gemäß FIG. 3 abwärts. Die Enden 26' der U- Schenkel des Platinenrohlings werden bei der Berührung mit der Formkammerwandung 24 nach innen gebogen und legen sich beim Aufsetzen des Formstempels 14 auf den Hilfsstempel 1 8 an diesen an. Im Bereich der parallelen Kammerflächenabschnitte beider Formstempel 1 2, 1 4 bleibt die Geradlinigkeit der U-Schenkel des Platinenrohlings 26 erhalten. Aufgrund der Stufe 1 7 in der Formkammer 24 erfolgt das Biegen der beiden Schenkelenden 26' mit einem geringen zeitlichen Versatz. Das Biegen der beiden Schenkelenden 26' zwischen dem zweiten Formstempel 14 und dem Hilfskern 1 8 stellt eine zwischengeschaltete Hilfsformung dar, nach der diese Schenkelenden 26' exakt kreiszylindrisch gebogen sind und damit schon ihre endgültige Form aufweisen. Nunmehr wird der Hilfskern 1 8 zusammen mit dem Schieber 20 in Richtung des Pfeiles A (FIG. 10) axial zwischen den Formstempeln 1 2, 14 weggezogen, wozu der zweite Formstempel 1 4 ggf. etwas geliftet wird. Nunmehr fährt der zweite Formstempel 1 4 erneut abwärts, um die Endformung der Buchse 27 zu bewirken. Nachdem der Schieber 20 aus dem ersten Formstempel 1 2 herausgezogen ist, kann der Formstempel 1 4 über die Stirnfläche 23 des ersten Formstempels 1 2 hinaus tiefer bis zur Bodenfläche 28 des Formstempels 1 2 einfahren, wobei die Stirnfläche 1 9 des zweiten Formstempels 1 4 das Kernzentrum nach unten überfährt bis die Innenfläche der Formkammer 24 den Buchsenrohling an seinen geraden U-Schenkelabschnitten ebenfalls kreiszylindrisch verformt, womit die Endformung der Buchse 27 beendet ist.Now the second die 1 4 moves according to FIG. 3 down. The ends 26 'of the U-legs of the blank blank are bent inwards when they come into contact with the mold chamber wall 24 and lie on the auxiliary stamp 18 when the mold stamp 14 is placed on it. In the area of the parallel chamber surface sections of the two dies 1 2, 1 4, the straightness of the U-legs of the blank 26 is preserved. Due to the stage 17 in the molding chamber 24, the bending of the two leg ends 26 'takes place with a slight time offset. The bending of the two leg ends 26 'between the second die 14 and the auxiliary core 18 represents an intermediate auxiliary shaping, according to which these leg ends 26' are bent exactly in a circular cylindrical manner and thus already have their final shape. Now the auxiliary core 1 8 is pulled together with the slide 20 in the direction of arrow A (FIG. 10) axially between the shaping dies 1 2, 14, for which purpose the second shaping punch 1 4 is possibly lifted somewhat. Now the second die 1 4 moves downward again to bring about the final shaping of the bushing 27. After the slide 20 is pulled out of the first die 1 2, the die 1 4 can extend deeper beyond the end face 23 of the first die 1 1 to the bottom surface 28 of the die 1 2, the end face 1 9 of the second die 1 4 The core center travels downward until the inner surface of the molding chamber 24 likewise deforms the socket blank at its straight U-leg sections in a circular-cylindrical manner, thus completing the final shaping of the socket 27.
Die Buchsenenden werden üblicherweise miteinander verzahnt. Dazu weisen die Buchsenränder miteinander wechselseitig in Eingriff tretende Vorsprünge und Aussparungen auf. Da die Stempelhälfte 1 4b den einen Buchsenrand zuerst gegen den Kern 16 drückt, kann das formschlüssige Schließen der Buchse 27 während der letzten Phase des Abwärtsganges des Stempelteils 14a erfolgen. Beide Stempel 1 2 und 14 fahren dann auseinander (FIG. 5), sodaß die fertige Buchse 27 vom Kern 1 6 abgestreift werden kann.The socket ends are usually interlocked. For this purpose, the bush edges have mutually engaging projections and recesses. Since the stamp half 1 4b first presses one socket edge against the core 16, the form-fitting closing of the socket 27 can take place during the last phase of the downward movement of the stamp part 14a. Both stamps 1 2 and 14 then move apart (FIG. 5), so that the finished bushing 27 can be stripped from the core 1 6.
Die Figuren 7 bis 1 2 veranschaulichen einen zusätzlichen Kalibriervorgang der Buchse 27, der in derselben Vorrichtung 10 in einer zweiten Arbeitsebene stattfindet. Dazu sind an beiden Formstempeln 1 2, 1 4 rechtseitig Werkzeugteile 30, 32 angebracht, die jeweils Kalibrierkammern 34, 36 aufweisen, die dieselben Wölbungen wie die Formkammern 22, 24 haben, sich jedoch jeweils nur über einen Umfangswinkel von 180° erstrecken. Im geschlossenen Zustand der Stempel 12, 1 4 liegt also die Teilungsebene der Kalibrierkammern 34, 36 auf Kernmitte. Der hohle Kern 1 6 wird von einer Betätigungsstange 38 durchsetzt, die in der zweiten Arbeitsebene einen Konus 40 trägt, die von einer Spreizhülse 42 umgeben ist.Figures 7 to 1 2 illustrate an additional calibration process of the bushing 27, which takes place in the same device 10 on a second working level. For this purpose, tool parts 30, 32 are attached to the two mold punches 1 2, 1 4 on the right, each having calibration chambers 34, 36, which have the same curvatures as the mold chambers 22, 24, but each only extend over a circumferential angle of 180 °. In the closed state of the punches 12, 1 4, the division plane of the calibration chambers 34, 36 thus lies at the core center. The hollow core 1 6 is penetrated by an operating rod 38 which carries a cone 40 in the second working plane, which is surrounded by an expansion sleeve 42.
Ausgehend von den Figuren 5 und 1 1 wird nun nach Endformung der Buchse 27 die aus Hilfskem 1 8 und Schieber 20 bestehende Baueinheit wieder in die erste Arbeitsebene eingeschoben, wodurch der Hilfskem 18 die Buchse 27 auf dem Kern 16 in die zweite Arbeitsebene über die Spreizhülse 42 schiebt. Die dort im vorigen Arbeitszyklus kalibrierte Buchse 27 wird gleichzeitig aus der Vorrichtung 10 herausgestoßen (FIG. 12). Die Vorrichtung 10 ist dann in der ersten Arbeitsebene für die Aufnahme einer neuen Platine 26 vorbereitet. Die Arbeitsabläufe der Vorformung, der Zwischenformung und der Endformung der Buchse 27 wiederholen sich und in der Stellung gemäß Figuren 4 und 10 sind die beiden Werkzeuge 30, 32 geschlossen und bilden einen zylindrischen Kalibrierhohlraum, der die Buchse 27 umschließt. In dieser Stellung wird die Betätigungsstange 38 in Richtung des Pfeiles A (FIG. 10) gezogen, wodurch die Spreizhülse 42 durch Wirkung des Konus 40 aufgeweitet wird und die Buchse 27 kalibriert.Starting from FIGS. 5 and 11, the structural unit consisting of auxiliary core 1 8 and slide 20 is now pushed back into the first working level after final shaping of the bushing 27, whereby the auxiliary core 18 inserts the bushing 27 on the core 16 into the second working level via the expansion sleeve 42 pushes. The socket 27 calibrated there in the previous work cycle is simultaneously pushed out of the device 10 (FIG. 12). The device 10 is then prepared in the first working level for receiving a new board 26. The work processes of preforming, intermediate shaping and final shaping of the bushing 27 are repeated and in the position according to FIGS. 4 and 10 the two tools 30, 32 are closed and form a cylindrical calibration cavity which encloses the bushing 27. In this position, the actuating rod 38 is pulled in the direction of the arrow A (FIG. 10), as a result of which the expansion sleeve 42 is expanded by the action of the cone 40 and the bushing 27 is calibrated.
In der dargestellten Vorrichtung 10 wird also eine Platine 26 ohne jegliche Handlingsgeräte in einer ersten Arbeitsebene hochgenau rundgebogen und verschlossen und in der zweiten Arbeitsebene kalibriert. In the device 10 shown, a board 26 is thus bent and closed with high precision in a first working level without any handling devices and calibrated in the second working level.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
Verfahren zum Rundbiegen von Buchsen, bei dem eine Platine (26) in einen Spalt zwischen einem, zur Innenkontur der Buchse (27) komplementären Kern (16) und einem ersten Formstempel (12) eingelegt wird, der eine erste mehrteilige Formkammer (22) aufweist, deren einer Teil eine Innenkontur hat, die zur Außenkontur der Buchse (27) komplementär ist und deren anderer Teil die Höhe der Formkammer vergrößert, sodaß sich diese über mehr als den halben Buchsenumfang erstreckt, daß durch relatives Einfahren des Kerns ( 16) in die erste Formkammer (22) die Platine (26) zu einem etwa U- förmigen Formung gebogen wird, daß durch relatives Einfahren des in der ersten Formkammer (22) eingetauchten Kerns ( 1 6) in eine ebenfalls zur Buchsenkontur komplementäre zweite Formkammer (24) eines zweiten Formstempels (14) die beiden Schenkel des U-förmigen Formlings in einer Endformung zu einer Buchse (27) verformt werden, wobei der Kern ( 1 6, 1 8) in die erste Formkammer (22) tiefer eingefahren wird, als es demMethod for bending bushes in a circular manner, in which a blank (26) is inserted into a gap between a core (16) which is complementary to the inner contour of the bush (27) and a first mold stamp (12) which has a first multi-part mold chamber (22) , one part of which has an inner contour that is complementary to the outer contour of the bushing (27) and the other part of which increases the height of the molding chamber, so that it extends over more than half the bushing circumference, by relative retraction of the core (16) into the first molding chamber (22) the board (26) is bent into an approximately U-shaped shape, that by relative insertion of the core (16) immersed in the first molding chamber (22) into a second molding chamber (24) which is also complementary to the socket contour second die (14), the two legs of the U-shaped molding are deformed into a bushing (27) in a final shaping, the core (1 6, 1 8) being moved deeper into the first molding chamber (22) than it is
Buchsenradius entspricht, und nach der Vorformung und vor der Endformung eine Hilfsformung erfolgt, bei welcher der Abstand der U-Schenkel des Formlings verringert wird, dadurch gekennzeichnet, daß während der Hilfsformung der Kern (1 6, 1 8) einen größeren Querschnitt aufweist als bei der Endformung und in Richtung der U-Schenkel des Formlings verlängert ist und daß durch relatives Einfahren der Schenkel des Formlings zusammen mit dem vergrößerten Kern (16, 1 8) in die zweite Formkammer (24) die Schenkelenden (26') entsprechend der Formkammerkontur jeweils nach innen gegen den vergrößerten Kern (1 6, 1 8) gebogen werden, ohne die an den Schenkelenden (26') angrenzenden Schenkelbereiche mitzubiegen. Corresponds to the socket radius, and after the preforming and before the final shaping, an auxiliary shaping is carried out in which the distance between the U-legs of the molded article is reduced, characterized in that during the auxiliary shaping the core (1 6, 1 8) has a larger cross section than in the case of the final shaping and in the direction of the U-leg of the molding is extended and that by relative retraction of the leg of the molding together with the enlarged core (16, 1 8) in the second molding chamber (24) the leg ends (26 ') in each case according to the molding chamber contour be bent inwards against the enlarged core (1 6, 1 8) without bending the leg regions adjacent to the leg ends (26 ').
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß der Kern (1 6, 18) während der Endformung der Buchse (27) in die zweite Formkammer (24) tiefer eingefahren wird, als es dem Buchsenradius entspricht, sodaß die Buchsenachse nach Endformung der Buchse (27) im Abstand von der Stirnflächenebene ( 1 9) des zweiten Formstempels ( 1 4) innerhalb dessen2. The method according to claim 1, characterized in that the core (1 6, 18) during the final shaping of the bushing (27) in the second molding chamber (24) is moved deeper than it corresponds to the bushing radius, so that the bushing axis after the final shaping Bushing (27) at a distance from the end face plane (1 9) of the second die (1 4) within it
Formkammer (24) liegt.Molding chamber (24) lies.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Vergrößerung des buchsenkomplementären Kerns ( 1 6) durch axiales Einfahren eines Hilfskerns ( 1 8) erfolgt.3. The method according to claim 1 or 2, characterized in that the enlargement of the socket-complementary core (1 6) is carried out by axially retracting an auxiliary core (1 8).
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der Beginn der Biegungen der beiden Enden (26') des Formlings mit geringer Verzögerung erfolgt.4. The method according to claim 3, characterized in that the beginning of the bends of the two ends (26 ') of the molding takes place with little delay.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Bearbeitung der Buchse (27) in zwei parallelen Arbeitsebenen erfolgt, daß in der ersten Arbeitsebene mindestens die Vorformung und die Endformung der Buchse (27) stattfinden, die dann axial in die zweite Arbeitsebene geschoben und dort kalibriert wird.5. The method according to any one of claims 1 to 4, characterized in that the machining of the bushing (27) takes place in two parallel working planes, that at least the preforming and the final shaping of the bushing (27) take place in the first working plane, which then axially in the second working level is pushed and calibrated there.
6. Verfahren nach Ansprüchen 3 bis 5, dadurch gekennzeichnet, daß die Buchse (27) nach ihrer Endformung von dem Hilfskem ( 1 8) in die zweite Arbeitsebene und auf eine Spreizhülse (42) der Kalibrierstation geschoben wird..6. The method according to claims 3 to 5, characterized in that the bush (27) after its final shaping of the auxiliary core (1 8) is pushed into the second working plane and onto an expansion sleeve (42) of the calibration station.
7. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß während der Vorformung in der geschlossenen Stellung beider Formkammern (22,24) deren Umfangskontur - abgesehen von der Wandstärke der Buchse (27) - der Außenkontur des im Querschnitt vergrößerten Kerns (16,18) komplementär ist.7. The method according to any one of claims 1 to 6, characterized in that during the preforming in the closed position of both mold chambers (22,24) their peripheral contour - apart from the wall thickness of the socket (27) - the outer contour of the core (16, 18), enlarged in cross section, is complementary.
8 Biegevorrichtung zur Herstellung von Buchsen (27) mit einem unteren Formstempel (12) und einem oberen Formstempel (14) zur Ausfuhrung des Verfahrens nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Kern (16, 18) und die erste Formkammer (22) während des Vorformungsvorganges jeweils einen größeren Querschnitt aufweisen als während des Endformungsvorganges.8 bending device for the production of bushings (27) with a lower die (12) and an upper die (14) for carrying out the method according to one or more of claims 1 to 7, characterized in that the core (16, 18) and first molding chamber (22) each have a larger cross section during the preforming process than during the final molding process.
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der erste Formstempel (12) einen in Buchsenachsrichtung verschiebbaren Schieber9. The device according to claim 8, characterized in that the first die (12) has a slidable in the sleeve axis
(20) lagert, der einen Teil der ersten Formkammer (22) bildet, und daß die Teilungsebene, des den Schieber (20) umfassenden ersten Formstempels (12) im Abstand von der Buchsenmitte auf der Seite des zweiten Formstempels liegt.(20), which forms part of the first molding chamber (22), and that the parting plane of the first molding die (12) comprising the slide (20) lies on the side of the second molding die at a distance from the center of the bushing.
10. Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß der Kern (16) während der Vorformung durch einen Hilfskem (18) ergänzt ist, der mit einer konkaven Fläche auf dem Kern (16) aufsitzt und eine konvexe Arbeitsfläche aufweist, die zur Formkammeπnnenflache des zweiten Formstempels (14) komplementär ist10. The device according to claim 8 or 9, characterized in that the core (16) is supplemented during the preforming by an auxiliary core (18) which sits on the core (16) with a concave surface and has a convex working surface which for Formkammeπnnenflache the second die (14) is complementary
11. Vorrichtung nach Ansprüchen 9 und 10, dadurch gekennzeichnet, daß der11. Device according to claims 9 and 10, characterized in that the
Hilfskem (18) mit dem Schieber (20) eine verschiebbare Baueinheit bildet.Auxiliary core (18) forms a displaceable structural unit with the slide (20).
12. Vorrichtung nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß der zweite Formstempel (14) aus zwei Hälften (14a, 14b) besteht, deren eine (14b) an der angetriebenen Hälfte (14a) mit ihrer Formkammerhalfte in Stempelbewegungsrichtung beweglich geführt ist und mittels Federkraft in eine zur anderen Stempelhälfte ( 1 4a) versetzte Ausgangslage vorgespannt ist, sodaß die Formkammer (24) an der Position der Buchsenränder zu deren Verzahnung eine Stufe ( 1 7) bildet.12. The device according to one of claims 8 to 11, characterized in that the second molding die (14) consists of two halves (14a, 14b), one (14b) on the driven half (14a) with its mold chamber half in Stamp movement direction is guided movably and is biased by spring force in an initial position offset to the other stamp half (1 4a), so that the molding chamber (24) forms a step (1 7) at the position of the bush edges for their teeth.
1 3 Vorrichtung nach einem der Ansprüche 8-1 2, dadurch gekennzeichnet, daß die beiden Formstempel ( 1 2, 1 4) eine Breite mindestens gleich der doppelten Breite der Buchse (27) aufweisen und axial neben ihren Formkammern (22, 24) jeweils eine Kalibrierkammer (34, 36) aufweisen, daß beide Kalibrierkammern (34, 6) dieselben Wölbungen wie ihre jeweils zugeordneten Formkammern (22, 24) aufweisen, sich aber jeweils nur über einen1 3 Device according to one of claims 8-1 2, characterized in that the two shaping punches (1 2, 1 4) have a width at least equal to twice the width of the bushing (27) and axially next to their molding chambers (22, 24) in each case have a calibration chamber (34, 36) in such a way that both calibration chambers (34, 6) have the same curvatures as their respective associated molding chambers (22, 24), but each have only one
Umfangswinkel von 1 80 ° erstrecken und im Endformungsvorgang einen umfangsgeschlossenen Kalibrierhohlraum entsprechend derExtend circumferential angle of 1 80 ° and in the final molding process a circumferentially closed calibration cavity corresponding to the
Außenmantelfläche der Buchse (27) bilden und daß in diesem Kalibrierhohlraum eine Spreizeinrichtung (40, 42) angeordnet ist.Form the outer surface of the sleeve (27) and that a spreader (40, 42) is arranged in this calibration cavity.
14 Vorrichtung nach Anspruch 1 3, dadurch gekennzeichnet, daß der Kern ( 16) hohl ausgebildet ist und von einer axial bewegten Betätigungsstange (38) durchsetzt wird, die im Bereich des Kalibrierhohlraumes einen Konus (40) aufweist, der mit einem Innenkonus einer Spreizhülse (42) zusammenwirkt. 14 Device according to claim 1 3, characterized in that the core (16) is hollow and is penetrated by an axially moved actuating rod (38) which in the region of the calibration cavity has a cone (40) which with an inner cone of an expansion sleeve ( 42) interacts.
PCT/EP1996/001172 1995-03-25 1996-03-19 Method and device for rounding cans WO1996030139A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP96908069A EP0759822B1 (en) 1995-03-25 1996-03-19 Method and device for rounding cans
KR1019960706661A KR970703207A (en) 1995-03-25 1996-03-19 METHOD AND DEVICE FOR ROUNDING CANS
JP8528874A JPH10501467A (en) 1995-03-25 1996-03-19 Method and apparatus for bending a bush
DE59603336T DE59603336D1 (en) 1995-03-25 1996-03-19 METHOD AND DEVICE FOR BENDING SOCKETS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511095A DE19511095A1 (en) 1995-03-25 1995-03-25 Method and device for bending bushings
DE19511095.1 1995-03-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US9718398A Continuation 1995-03-25 1998-06-12

Publications (1)

Publication Number Publication Date
WO1996030139A1 true WO1996030139A1 (en) 1996-10-03

Family

ID=7757805

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/001172 WO1996030139A1 (en) 1995-03-25 1996-03-19 Method and device for rounding cans

Country Status (10)

Country Link
EP (1) EP0759822B1 (en)
JP (1) JPH10501467A (en)
KR (1) KR970703207A (en)
CN (1) CN1064869C (en)
AT (1) ATE185502T1 (en)
CA (1) CA2220097A1 (en)
DE (3) DE19511095A1 (en)
ES (1) ES2138810T3 (en)
RU (1) RU2161544C2 (en)
WO (1) WO1996030139A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850220A1 (en) * 1998-10-31 2000-05-11 Turbo Clean Gmbh Method and device for producing wound and bent sheet metal parts
CN108393381A (en) * 2018-05-18 2018-08-14 秦皇岛兴龙轮毂有限公司 Conical screen producing device

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1058916C (en) * 1998-06-15 2000-11-29 许红喜 Method for producing shaft sleeve by tetrachronium 13 bar material
DE102010037533A1 (en) 2010-09-14 2012-03-15 Thyssenkrupp Steel Europe Ag Apparatus and method for producing at least partially closed hollow profiles with low cycle time
CN102151753A (en) * 2011-01-08 2011-08-17 宁波轴瓦厂 One-step punching and coiling forming die for shaft sleeve
CN102172732B (en) * 2011-01-29 2013-01-16 昆山联德精密机械有限公司 Progressive die rounding and core-pulling mechanism
JP5788625B2 (en) * 2012-04-03 2015-10-07 ティッセンクルップ スチール ヨーロッパ アクチェンゲゼルシャフトＴｈｙｓｓｅｎＫｒｕｐｐ Ｓｔｅｅｌ Ｅｕｒｏｐｅ ＡＧ Apparatus and method for producing at least partially closed profiles or tubular parts from sheet metal
CN102615152A (en) * 2012-04-23 2012-08-01 无锡铸华机械科技有限公司 Process and die for one-time round-bending and molding
CN102962374B (en) * 2012-08-10 2015-02-25 贵州航天精工制造有限公司 Method and device for machining saddle-type lining part
CN103624135A (en) * 2013-11-27 2014-03-12 安徽鑫龙电器股份有限公司 Punching composite die for machining shaft sleeve and machining method thereof
RU2673365C2 (en) * 2014-09-18 2018-11-26 Ниппон Стил Энд Сумитомо Метал Корпорейшн Method of manufacturing molded product, tool equipment and product of tubular form
CN104324987B (en) * 2014-11-13 2016-05-04 广州科技职业技术学院 Automatic rolling circular bending modular system and using method thereof
CN104493486B (en) * 2014-12-23 2016-10-12 绵阳富临精工机械股份有限公司 A kind of OCV filter screen rolls double team device and operational method
CN105537471B (en) * 2016-02-03 2019-03-08 重庆金猫纺织器材有限公司 A kind of high-precision numerical control molding machine for ring-traveller
CN106111837B (en) * 2016-06-17 2017-11-14 宁夏太阳镁业有限公司 A kind of machine-shaping device for magnesium crystallizer
CN110461488B (en) * 2017-03-15 2021-09-10 杰富意钢铁株式会社 Press die and method for manufacturing steel pipe
DE102020000238B4 (en) 2020-01-16 2022-08-04 Fritz Stepper GmbH & Co. KG. core station
CN111872885B (en) * 2020-07-01 2022-10-04 中国石油天然气股份有限公司 Elastic ball seat curling installation tool and use method
CN112676418A (en) * 2020-12-07 2021-04-20 安徽科达汽车轴瓦有限公司 Bearing bush stamping and shaping device convenient to locate

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR675967A (en) * 1929-05-30 1930-02-17 Pont A Mousson Fond Improvements to the process and installations for the manufacture of tubes
US2077336A (en) * 1935-01-07 1937-04-13 Gen Motors Corp Apparatus for forming circular bushings
US3675460A (en) * 1970-06-08 1972-07-11 Torin Corp Four-slide machine with improved mandrel for producing bearings and the like

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1330782A (en) * 1918-09-05 1920-02-17 Brown William Milton Method of and apparatus for making ferrules
US1802723A (en) * 1928-12-19 1931-04-28 Cleveland Graphite Bronze Co Method of and apparatus for making bearings
US2126473A (en) * 1933-08-31 1938-08-09 Gen Motors Corp Method of making tubular articles
DE667949C (en) * 1936-02-29 1938-11-23 Sonntag G M B H R Device for the production of pipes on a press brake
US3973717A (en) * 1975-04-21 1976-08-10 Ppg Industries, Inc. Bushing fabrication
DE3523091A1 (en) * 1985-06-28 1987-01-02 Feuchtenberger Irmgard Process for the manufacture of annular machine elements
DD287148A7 (en) * 1988-12-19 1991-02-21 Thueringer Gartengeraete Gmbh,De TOOL FOR THE MANUFACTURE OF A CONDUCTIVE PIPE TUBE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR675967A (en) * 1929-05-30 1930-02-17 Pont A Mousson Fond Improvements to the process and installations for the manufacture of tubes
US2077336A (en) * 1935-01-07 1937-04-13 Gen Motors Corp Apparatus for forming circular bushings
US3675460A (en) * 1970-06-08 1972-07-11 Torin Corp Four-slide machine with improved mandrel for producing bearings and the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850220A1 (en) * 1998-10-31 2000-05-11 Turbo Clean Gmbh Method and device for producing wound and bent sheet metal parts
DE19850220C2 (en) * 1998-10-31 2003-01-02 Turbo Clean Gmbh Device for manufacturing bushings
CN108393381A (en) * 2018-05-18 2018-08-14 秦皇岛兴龙轮毂有限公司 Conical screen producing device
CN108393381B (en) * 2018-05-18 2023-12-05 秦皇岛兴龙轮毂有限公司 Conical filter screen manufacturing device

Also Published As

Publication number Publication date
DE19511095A1 (en) 1996-09-26
CA2220097A1 (en) 1996-10-03
ATE185502T1 (en) 1999-10-15
CN1148822A (en) 1997-04-30
JPH10501467A (en) 1998-02-10
ES2138810T3 (en) 2000-01-16
DE29511070U1 (en) 1995-09-14
EP0759822A1 (en) 1997-03-05
CN1064869C (en) 2001-04-25
DE59603336D1 (en) 1999-11-18
KR970703207A (en) 1997-07-03
EP0759822B1 (en) 1999-10-13
RU2161544C2 (en) 2001-01-10

Similar Documents

Publication Publication Date Title
EP0759822B1 (en) Method and device for rounding cans
DE2409668C2 (en) Method and device for compacting a metal powder compact from a main body and a hub part
DE3874811T2 (en) METHOD FOR PRODUCING BOX-SHAPED ITEMS.
DE102009003668B4 (en) Device and method for producing at least partially closed profiles or semi-finished products from a circuit board
WO2012034967A1 (en) Device and method for producing at least partially closed hollow profiles with rotatable die halves and low cycle time
DE19820473A1 (en) Bending press for ductile metal plates
DE19508952C2 (en) Press device for producing a molded part and corresponding molded part
WO2006021391A1 (en) Method and device for the production of a longitudinally welded hollow profile
DE4410146C2 (en) Device for the production of press fittings
EP2370214B1 (en) Method and device for producing a cage of a rolling bearing
EP0941780B1 (en) Method and device for producing a hollow body with bulges at a distance from oneanother
DE3033475C2 (en)
DE2928707C2 (en) Device for manufacturing fork elements
EP0682999B1 (en) Article molded from metal powder and process and apparatus for preparing the same
EP1024913B1 (en) Method and device for producing a shaft from a tubular workpiece
DE19912864B4 (en) Method and machine for producing slot insulations for electric motor stators
DE19755342A1 (en) Method for holding and forming a workpiece
DE2646502C2 (en) Device for the production of a metal ring element
DE2025482C2 (en) Method and device for the production of metal sleeves
DE4444857C1 (en) Method for forming opening in wall of esp. exhaust pipe
DD155126A5 (en) METHOD FOR PRODUCING ROHLINGS FOR PRESSURE COMPOUNDS
DE3943368C2 (en) Device for producing a bellows or corrugated pipe
DE2953354C2 (en) Method for producing an inner joint body for a constant velocity joint
DE3911441A1 (en) METHOD FOR PRODUCING A SEMI-DIVIDED BEARING
DE1959881A1 (en) Process and machine for the fully automatic production of spring pins with a wavy longitudinal slot

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 96190229.9

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): CA CN JP KR RU SG US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

ENP Entry into the national phase

Ref document number: 1996 737636

Country of ref document: US

Date of ref document: 19961115

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1996908069

Country of ref document: EP

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 1996908069

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2220097

Country of ref document: CA

Ref document number: 2220097

Country of ref document: CA

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: CA

WWG Wipo information: grant in national office

Ref document number: 1996908069

Country of ref document: EP