EP0351560B1 - Machine for changing the cross-sectional shape of round casings, in particular for caps - Google Patents

Machine for changing the cross-sectional shape of round casings, in particular for caps Download PDF

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Publication number
EP0351560B1
EP0351560B1 EP19890111046 EP89111046A EP0351560B1 EP 0351560 B1 EP0351560 B1 EP 0351560B1 EP 19890111046 EP19890111046 EP 19890111046 EP 89111046 A EP89111046 A EP 89111046A EP 0351560 B1 EP0351560 B1 EP 0351560B1
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EP
European Patent Office
Prior art keywords
expanding
mandrel
orientation
expanding mandrel
gripper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19890111046
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German (de)
French (fr)
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EP0351560A2 (en
EP0351560A3 (en
Inventor
Felix Kramer
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Elpatronic AG
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Elpatronic AG
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Publication of EP0351560A2 publication Critical patent/EP0351560A2/en
Publication of EP0351560A3 publication Critical patent/EP0351560A3/en
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    • 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
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2646—Of particular non cylindrical shape, e.g. conical, rectangular, polygonal, bulged

Definitions

  • Such machines which are the subject of DE-A-3725186 (published on January 19, 1989) and DE-A-3811995 (published on September 28, 1989), have an expanding mandrel turret which can be driven in rotation about a central axis and several around this axis arranged expansion mandrels.
  • the expanding mandrel turret can carry the expanding mandrels with expanding mandrel axes arranged parallel to the central axis (DE-A-3725186) or can be designed in the manner of a star revolver, the expanding mandrel axes extending radially to the central axis (DE-A- 3811995).
  • the machines according to the older patent applications mentioned are intended to be arranged directly behind a machine for rounding the frames and producing the longitudinal seam, for example by welding. It is assumed that the frames are transported one behind the other in the direction of their axis and a certain orientation of their longitudinal seam is maintained, so that this comes to lie exactly in the middle between two segment bars when a can is pushed onto an expanding mandrel.
  • JP-A-59 163 041 which is considered to be the closest prior art, has disclosed a holder for a rotating expansion device for can bodies, in which the holding and releasing of the can bodies can be controlled by means of a magnet which is displaceably guided in a frame .
  • the can bodies are transferred to the rotating spreading device via a loading conveyor and a star wheel, on which they are held by means of the magnet.
  • a conveyor rod actuated by a cam lifts the empty can body located on a holding base, segment-shaped expansion stamps being introduced into the can body.
  • a control rod is moved in such a way that a round conical part attached to it is pressed against a roller.
  • a sliding plate is pulled back as far as it corresponds to the spread diameter of the can body.
  • the segment-shaped expansion stamps are now pressed outwards in the circumferential direction, as a result of which the can body is stretched and shaped.
  • the can body with the holding base is lowered again. If the can body reaches an unloading starwheel while turning further, the magnet drops off, whereby the can body can be taken along by the unloading starwheel and transported away by means of an unloading conveyor.
  • An orientation of a longitudinal frame seam with respect to the expansion stamps is not provided in this known device.
  • the invention has for its object to develop a machine of the type described in such a way that the rounded frames, whose cross-sectional shape is to be changed, can be fed to the longitudinal seam in any orientation and still ensure that when pushing each frame onto the expanding mandrel , which is to deform it, a certain position of the longitudinal seam is maintained with respect to the segment rods.
  • the orientation device with the frame held by it can be driven in rotation by a stepper motor arranged coaxially with the expanding mandrel, a sensor being provided which interrupts the rotation of the orientation device when the specific position of the longitudinal seam of the frame is reached.
  • the feed conveyor device for feeding raw frames and a discharge conveyor for removing finished frames define an intermediate floor, which is between an orientation floor defined by the orientation devices and one of them Spreading mandrel defined spreading floor is arranged.
  • the above-mentioned levels preferably have distances from one another that rule out collisions between frames arranged in different levels, in which case it is possible to have each individual frame complete more than one full cycle, for example with the orientation turret and with the expanding turret, three quarters each Rotation, so that there is plenty of time for orienting and deforming each frame and the frames still leave the machine at short intervals.
  • the first gripper is preferably a tong gripper and the second gripper is a magnetic gripper.
  • the machine works particularly smoothly even at high turning speeds if the two revolvers can be rotated continuously while orienting and deforming the frames.
  • the machine according to the invention can be equipped with an embossing device for embossing on the side surfaces of the frames, if this is arranged on a boom which can be pivoted about the central axis in the same direction as the two revolvers and can be pivoted back in the opposite direction.
  • the cylindrical frames 10 are fed upright, but otherwise disordered, to a feed conveyor 16.
  • This includes a conveyor belt 18 which is driven at a continuously adjustable speed; for this purpose, the conveyor belt 18 is connected to a main motor 28, which also drives a central vertical shaft 30, via a variator gear 20, a chain drive 22, a cardan shaft 24 and a branching gear 26.
  • the geometrical The axis of this shaft 30 is referred to below as the central axis A.
  • the feed conveyor 16 also includes a horizontal screw conveyor 32, from which the frames 10 are individually fed to a metering wheel 34, which forms a feed conveyor device with the feed conveyor 16 and which is rotatable about a vertical axis and has recesses 36 for it at regular intervals on its edge each has a frame.
  • the movement path of the frames 10 gripped by the metering wheel 34 is delimited radially outwards by a cylindrical wall section 38.
  • the cylindrical wall section 38 ends above an expanding mandrel turret 40 which is fastened to the shaft 30 and can be rotated with it about the central axis A.
  • mandrel turret 40 twelve mandrels 42 are arranged around the central axis A at regular intervals.
  • Each expanding mandrel 42 has an annular support body 44 fastened to the expanding mandrel turret 40, four segment rods 46, which can be moved radially with respect to the supporting body 44, and an expanding wedge 48 (FIG. 3).
  • the expanding wedge 48 of each expanding mandrel 42 can be displaced along its axis, the expanding axis B, in order to spread apart the associated segment rods 46.
  • Return springs (not shown) are provided for resetting the segment rods 46.
  • Exemplary embodiments of the expanding mandrels 42 result from the older patent applications mentioned.
  • the expanding mandrel axes B are arranged parallel to the central axis A.
  • Each expanding wedge 48 is fastened to an axial shaft 50 and carries a pair of axially parallel guide rods 52 which are guided in the expanding mandrel turret 40.
  • the lower end of each A cam follower roller 54 is mounted on the shaft 50.
  • the cam followers 54 of all expanding mandrels 42 run on a common cam body 56 which is arranged coaxially with the expanding mandrel turret 40 and is designed such that each expanding mandrel 42 executes a complete working cycle when the expanding mandrel turret 40 rotates fully.
  • the central shaft 30 extends above the expanding mandrel turret 40 through a stationary, tubular axle body 58. Above the axle body 58, an orienting turret 60 is fastened on the central shaft 30, on which twelve orienting devices 62 are mounted at equal angular intervals.
  • the orienting devices 62 are arranged coaxially with one of the expanding mandrels 40 and rotatable about the associated expanding mandrel axis B.
  • the orienting devices 62 are cup-shaped, permanently magnetized metal parts which expand downwards in such a way that they can each grasp, center and hold one of the cylindrical frames 10 conveyed by the metering wheel 34 at their upper edge.
  • Each orientation device 62 is assigned a stepping motor 64 attached to the top of the orientation turret 60, a sensor 66 attached to the bottom of the orientation turret, and an amplifier 68.
  • the sensor 66 is a light sensor that emits a signal when the longitudinal seam 12 of the frame 10 hanging on the associated rotating orienting device 62 assumes a predetermined position.
  • This signal is amplified by the associated amplifier 68 and causes the associated stepper motor 64 to stop when the longitudinal seam 12 reaches its predetermined position Has.
  • the predetermined position is that in which the longitudinal seam 12 points forward in the direction of the common rotation of the expanding mandrel turret 40 and the orientation turret 60 indicated by an arrow C in FIGS. 1 and 2.
  • a slide-on device 70 is assigned to each expanding mandrel 42 and the associated orienting device 62, which rotates together with the expanding mandrel turret 40 and the orienting turret 60.
  • Each of the twelve push-on devices 70 in total has a two-armed upper gripper 72 and a one-armed magnetic lower gripper 74, both of which are movable radially and parallel to the central axis A.
  • the upper grippers 72 of all push-on devices 70 are assigned a common curve 76, formed by a groove, for lifting movements rising and falling parallel to the main axis A, and a common curve 78 for opening and closing movements.
  • the lower grippers 74 of all push-on devices 70 are assigned a common curve 80 for lifting movements and a further common curve 82 for radial movements. All of the curves mentioned are arranged in a stationary manner on the axle body 58.
  • the height at which the frames 10 are located on the feed conveyor 16 is referred to below as the intermediate floor E1.
  • the curves 76 and 78 are designed so that each upper gripper 72, when it reaches a certain position on the edge of the metering wheel 34, grips the cylindrical frame 10 arriving in the direction of arrow D at the same time, takes it along and then along the associated expanding mandrel axis B. from the intermediate floor E1 up to an orientation floor E2.
  • the frame 10 is pushed into the associated orientation device 62, centered by it and held by magnetic force.
  • the gripper 72 is then opened so that the frame 10 can be rotated with the orienting device 62 about the associated expanding mandrel axis B until the longitudinal seam 12 has reached the desired orientation.
  • the revolvers 40 and 60 keep rotating, for example by 210 °.
  • the associated upper gripper 72 is closed again and moves the relevant frame 10 downward from the orienting device 62 into the intermediate level E1, i.e. into the height position at which the frame 10 has arrived on the feed conveyor 16.
  • the frame 10 is magnetically grasped by the associated lower gripper 74, in order then to be moved further downward and to be plugged onto the associated expanding mandrel 42 in the direction of the expanding mandrel axis B.
  • the height at which the frame 10 is now located is referred to as the spreading level E3.
  • the revolvers 40 and 60 have rotated for example by 60 °.
  • the frame 10 is widened in the usual way on the expanding mandrel 42.
  • the rotation of the revolvers 40 and 60 is not interrupted in the illustrated machine.
  • the revolvers 40 and 60 have moved by, for example, a further 210 ° about the central axis A, the deformation of the frame 10 caused by the expanding mandrel 42 itself is completed.
  • the frame 10 is moved back up into the intermediate days E1 by the associated gripper 74 and is thereby pulled off the expanding mandrel 42.
  • the frame 10 has now reached the working area of an embossing device 84.
  • This is arranged on a radial arm 86, which is driven by a set of curves 88 and can be pivoted back and forth in an angular range of, for example, 20 ° about the central axis A.
  • the embossing device 84 produces the lateral embossments 14, which stiffen the now rectangular and conically deformed frame 10.
  • the embossing device 84 returns to its starting position in order to emboss the frame 10 arriving on the next expanding mandrel 42.
  • the frame 10 which has already been provided with the embossments 14 and is thereby finished, has reached a discharge conveyor 90 due to the more advanced rotation of the revolvers 40 and 60.
  • This includes a pair of magnetic plates 92 which are also rotated about a vertical axis by the main motor 28.
  • the finished frame 10 is separated from the gripper 74 by a stationary deflecting rail, not shown, and taken from the plates 92 to a horizontal conveyor belt 94, which is arranged on the mezzanine floor E1, that is to say at the same height as the conveyor belt 18 of the feed conveyor 16.
  • the Conveyor belt 94 is driven synchronously with the plates 92 and the revolvers 40 and 60 by means of a cardan shaft 96 from the main motor 28 and is magnetized so that it further conveys the finished frame 10 after it has been separated from the plates 92 by another deflecting rail, not shown .
  • the entire machine can be rotated with a handwheel 98 to set up the individual devices or to rectify faults.
  • each of the upper grippers 72 has a gripper carriage 100 which can be displaced on a pair of vertical rods attached to the orienting turret 60, namely a radially inner rod 102 and a radially outer rod 104.
  • the mentioned curve 76 ensures the displacement of the gripper carriage 100.
  • Two gripper arms 106 are pivotally mounted on the gripper carriage 100 about the rod 102, each of which carries a gripper jaw 108 and is indirectly controlled by the mentioned curve 78.
  • the indirect control comprises a rocker arm 110 which runs along the curve 78 and is fastened to a further vertical rod 112.
  • the rod 112 is rotatably mounted on the orienting turret 60 and has a cam profile on which the gripping jaws 108 are supported via a roller 114 each.
  • Each of the lower grippers 74 has a gripper slide 116, which is guided on a pair of vertical rods 118 so that it can slide.
  • the pair of rods 118 is attached to the expanding mandrel turret 40.
  • a radial pair of rods 120 is displaceably guided on the gripper slide 118, to which a magnetic gripping jaw 122 is fastened on the outside and a roller 124 is mounted radially on the inside so that it can rotate about a horizontal axis.
  • the roller 124 can be rolled on a roller track 126, which is displaceably guided on a radial pair of rods 128 and is controlled by the curve 82 mentioned.
  • the embossing device 84 is shown in more detail in FIGS. 5 and 6.
  • a pair of jaw supports 130 is pivotally mounted about a horizontal axle 132.
  • an embossing jaw 134 is mounted on a journal 136, which extends parallel to the journal 132.
  • a roller 138 is mounted at the upper end of each jaw carrier 130. Between The rollers 138 are supported on the boom 86 by a cam 140 which is controlled by a tappet 142.
  • the plunger 142 is guided on the arm 86 so as to be radially displaceable with respect to the central axis A and is loaded radially outward by a spring 144 in such a way that a roller 146 mounted on the outer end of the plunger 142 is held against a stationary control cam 148.
  • the plunger 142 executes radial movements, by means of which the stamping jaws 134 are moved towards and away from one another.
  • the embossing device 84 is assigned a horizontal control shaft 150 which is driven by the main motor 28.
  • a pair of grooved cams 152 are attached to the control shaft 150, of which a pair of lever arms 154 are controlled.
  • the two lever arms 154 are firmly connected to a lever arm 156 arranged approximately at right angles to them, which is connected to an arm of an angle lever 160 via a coupling rod 158 of adjustable length.
  • the angle lever 160 is pivotable about a vertical axle 162 and has a second arm which is connected to the boom 86 by a further coupling rod 164 of adjustable length.

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Description

Die Erfindung betrifft eine Maschine zum Verändern der Querschnittsform gerundeter Zargen, insbesondere für Dosen, die eine Längsnaht aufweisen, mit

  • mindestens einem Spreizdorn, der mehrere rings um eine Spreizdornachse angeordnete, auseinanderspreizbare Segmentstangen aufweist,
  • einer Zuführ-Fördereinrichtung, mit der die Zargen in eine gleichachsig mit einem Spreizdorn liegende Position gebracht werden, und
  • einer Aufschiebevorrichtung zum Aufschieben jeweils einer Zarge auf den Spreizdorn, wobei die Längsnaht der Zargen vor dem Aufschieben eine bestimmte Lage bezüglich der Segmentstangen einnimmt.
The invention relates to a machine for changing the cross-sectional shape of rounded frames, in particular for cans that have a longitudinal seam
  • at least one expanding mandrel which has a plurality of segment bars which can be spread apart and are arranged around an expanding mandrel axis,
  • a feed conveyor with which the frames are brought into a position lying coaxially with an expanding mandrel, and
  • a push-on device for pushing a frame onto the expanding mandrel, the longitudinal seam of the frames taking on a specific position with respect to the segment rods before being pushed on.

Solche Maschinen, die Gegenstand der DE-A-3725186 (publiziert am 19.01.89) und DE-A-3811995 (publiziert am 28.09.89) sind, haben einen Spreizdornrevolver, der um eine zentrale Achse drehantreibbar ist und mehrere rings um diese Achse angeordnete Spreizdorne trägt. Dabei kann der Spreizdornrevolver beispielsweise in der Art eines Trommelrevolvers die Spreizdorne mit parallel zur zentralen Achse angeordneten Spreizdornachsen tragen (DE-A-3725186) oder in der Art eines Sternrevolvers gestaltet sein, wobei die Spreizdornachsen sich radial zur zentralen Achse erstrecken (DE-A-3811995). Möglich sind auch Anordnungen in der Art eines Kronenrevolvers, wobei die Spreizdornachsen je eine Mantelfläche eines gedachten Kegels bilden, dessen Achse die zentrale Achse ist. All diese Anordnungen sind grundsätzlich auch im Rahmen der vorliegenden Erfindung möglich.Such machines, which are the subject of DE-A-3725186 (published on January 19, 1989) and DE-A-3811995 (published on September 28, 1989), have an expanding mandrel turret which can be driven in rotation about a central axis and several around this axis arranged expansion mandrels. The expanding mandrel turret can carry the expanding mandrels with expanding mandrel axes arranged parallel to the central axis (DE-A-3725186) or can be designed in the manner of a star revolver, the expanding mandrel axes extending radially to the central axis (DE-A- 3811995). Arrangements in the manner of a crown turret are also possible, the expanding mandrel axes each forming an outer surface of an imaginary cone, the axis of which is the central axis. In principle, all of these arrangements are also possible within the scope of the present invention.

Die Maschinen nach den genannten älteren Patentanmeldungen sind dazu vorgesehen, unmittelbar hinter einer Maschine zum Runden der Zargen und Herstellen der Längsnaht, beispielsweise durch Schweißen, angeordnet zu werden. Dabei wird vorausgesetzt, daß die Zargen hintereinander in Richtung ihrer Achse transportiert werden und eine bestimmte Orientierung ihrer Längsnaht aufrechterhalten wird, so daß diese beim Aufschieben einer Dose auf einen Spreizdorn genau mittig zwischen zwei Segmentstangen zu liegen kommt.The machines according to the older patent applications mentioned are intended to be arranged directly behind a machine for rounding the frames and producing the longitudinal seam, for example by welding. It is assumed that the frames are transported one behind the other in the direction of their axis and a certain orientation of their longitudinal seam is maintained, so that this comes to lie exactly in the middle between two segment bars when a can is pushed onto an expanding mandrel.

In manchen Fällen besteht jedoch das Bedürfnis, zwischen einer Maschine zum Runden von Zargen und Herstellen ihrer Längsnaht und einer nachgeordneten Maschine zum Verändern der Querschnittsform der gerundeten Zargen eine Pufferzone zu schaffen, damit beide Maschinen mindestens zeitweise unabhängig voneinander arbeiten können. In einer solchen Pufferzone ist es nicht oder nur mit großem Aufwand möglich eine bestimmte Orientierung der Längsnaht jeder einzelnen Zarge aufrechtzuerhalten. Dies gilt vor allem dann, wenn die Zargen in der Pufferzone aus Gründen der Platzersparnis nicht axial hintereinander gespeichert werden, sondern achsparallel zueinander auf einer Stirnseite stehend.In some cases, however, there is a need to create a buffer zone between a machine for rounding frames and producing their longitudinal seam and a downstream machine for changing the cross-sectional shape of the rounded frames so that both machines can work independently of one another at least at times. In such a buffer zone it is not possible or only with great effort to maintain a certain orientation of the longitudinal seam of each individual frame. This is especially true if the frames in the buffer zone are not stored axially one behind the other for reasons of space saving, but instead are parallel to one another on one end face.

Mit der JP-A-59 163 041, die als nächstliegender Stand der Technik angesehen wird, ist ein Halter für eine rotierende Spreizvorrichtung für Dosenkörper bekannt geworden, bei welcher mittels eines in einem Rahmen verschiebbar geführten Magneten das Festhalten und Freigeben der Dosenkörper gesteuert werden kann. Hierbei werden die Dosenkörper über einen Beladeförderer und ein Sternrad der rotierenden Spreizvorrichtung übergeben, an der sie mittels des Magneten gehalten werden. Eine durch einen Nocken betätigte Förderstange hebt den auf einer Haltebasis befindlichen leeren Dosenkörper an, wobei segmentförmige Spreizstempel in den Dosenkörper eingeführt werden. Danach wird eine Steuerstange derart verschoben, dass ein an dieser angebrachter runder konischer Teil gegen eine Rolle gepresst wird. Dabei wird eine Gleitplatte so weit zurückgezogen, wie es dem gespreizten Durchmesser des Dosenkörpers entspricht. Mittels eines vom Nocken betätigten hydraulischen Kolbens werden nun die segmentförmigen Spreizstempel in Umfangsrichtung nach aussen gedrückt, wodurch der Dosenkörper gedehnt und geformt wird. Nach dem Zusammenziehen der Spreizstempel wird der Dosenkörper mit der Haltebasis wieder abgesenkt. Wenn der Dosenkörper beim Weiterdrehen ein Entlade-Sternrad erreicht, fällt der Magnet ab, wodurch der Dosenkörper vom Entlade-Sternrad mitgenommen und mittels eines Entladeförderers abtransportiert werden kann. Eine Orientierung einer Zargen-Längsnaht bezüglich den Spreizstempeln ist bei dieser bekannten Vorrichtung nicht vorgesehen.JP-A-59 163 041, which is considered to be the closest prior art, has disclosed a holder for a rotating expansion device for can bodies, in which the holding and releasing of the can bodies can be controlled by means of a magnet which is displaceably guided in a frame . Here, the can bodies are transferred to the rotating spreading device via a loading conveyor and a star wheel, on which they are held by means of the magnet. A conveyor rod actuated by a cam lifts the empty can body located on a holding base, segment-shaped expansion stamps being introduced into the can body. Then a control rod is moved in such a way that a round conical part attached to it is pressed against a roller. A sliding plate is pulled back as far as it corresponds to the spread diameter of the can body. By means of a hydraulic piston actuated by the cam, the segment-shaped expansion stamps are now pressed outwards in the circumferential direction, as a result of which the can body is stretched and shaped. After the expansion stamps have been pulled together, the can body with the holding base is lowered again. If the can body reaches an unloading starwheel while turning further, the magnet drops off, whereby the can body can be taken along by the unloading starwheel and transported away by means of an unloading conveyor. An orientation of a longitudinal frame seam with respect to the expansion stamps is not provided in this known device.

Der Erfindung liegt die Aufgabe zugrunde, eine Maschine der eingangs beschriebenen Gattung derart weiterzubilden, daß ihr die gerundeten Zargen, deren Querschnittsform verändert werden soll, in beliebiger Orientierung der Längsnaht zugeführt werden können und dennoch sichergestellt ist, daß beim Aufschieben jeder einzelnen Zarge auf den Spreizdorn, der sie verformen soll, eine bestimmte Lage der Längsnaht in bezug auf die Segmentstangen eingehalten wird.The invention has for its object to develop a machine of the type described in such a way that the rounded frames, whose cross-sectional shape is to be changed, can be fed to the longitudinal seam in any orientation and still ensure that when pushing each frame onto the expanding mandrel , which is to deform it, a certain position of the longitudinal seam is maintained with respect to the segment rods.

Die Aufgabe ist erfindungsgemäss bei einer Maschine der eingangs beschriebenen Gattung dadurch gelöst,

  • dass die Aufschiebevorrichtung für jeden Spreizdorn zwei in Richtung der Spreizdornachse gegeneinander versetzte, gemeinsam in Richtung dieser Achse hin- und herbewegbare Greifer aufweist, von denen ein oberer Greifer für die Verschiebung je einer von der Zuführ-Fördereinrichtung übernommenen Zarge zu einer Orientiervorrichtung in Form einer Halterung sowie für einen ersten Abschnitt der Verschiebung der Zarge von der Orientiervorrichtung zum zugehörigen Spreizdorn vorgesehen ist, während ein unterer Greifer für den Rest der Verschiebung der Zarge zum Spreizdorn hin sowie für das Entnehmen der verformten Zarge vom Spreizdorn vorgesehen ist,
  • dass den oberen Greifern eine gemeinsame erste Steuerkurve für parallel zu einer Hauptachse auf- und niedergehende Hubbewegungen sowie eine gemeinsame zweite Steuerkurve für Oeffnungs- und Schliessbewegungen der Greifer zugeordnet ist, und
  • dass den unteren Greifern eine gemeinsame erste Steuerkurve für Hubbewegungen und eine zweite gemeinsame Steuerkurve für zur Hauptachse radiale Bewegungen der Greifer zugeordnet ist, wobei die Steuerkurven ortsfest an einem Achskörper angeordnet sind.
According to the invention, the object is achieved in a machine of the type described in the introduction by
  • that the slide-on device for each expanding mandrel has two grippers which are offset relative to one another in the direction of the expanding mandrel axis and can be moved back and forth together in the direction of this axis, of which an upper gripper for the displacement of a frame taken over from the feed conveyor to an orienting device in the form of a holder and for a first section of the displacement of the frame from the orientation device to the associated expanding mandrel, while a lower gripper is provided for the rest of the displacement of the frame towards the expanding mandrel and for removing the deformed frame from the expanding mandrel,
  • that the upper grippers are assigned a common first control curve for upward and downward stroke movements parallel to a main axis and a common second control curve for opening and closing movements of the grippers, and
  • that the lower grippers are assigned a common first control curve for lifting movements and a second common control curve for radial movements of the grippers relative to the main axis, the control curves being arranged in a stationary manner on an axle body.

In einer bevorzugten Ausführungsform ist die Orientierungsvorrichtung mit der von ihr festgehaltenen Zarge durch einen gleichachsig mit dem Spreizdorn angeordneten Schrittmotor drehantreibbar, wobei ein Sensor vorgesehen ist, der die Drehung der Orientierungsvorrichtung bei Erreichen der bestimmten Lage der Längsnaht der Zarge unterbricht.In a preferred embodiment, the orientation device with the frame held by it can be driven in rotation by a stepper motor arranged coaxially with the expanding mandrel, a sensor being provided which interrupts the rotation of the orientation device when the specific position of the longitudinal seam of the frame is reached.

Die erindungsgemäss Maschine hat vorzugsweise, insoweit übereinstimmend mit den beiden genannten älteren Patentanmeldungen, einen Spreizdornrevolver, der um eine zentrale Achse drehantreibbar ist und mehrere rings um die zentrale Achse angeordnete Spreizdorne trägt. Dabei kann der Spreizdornrevolver ein Trommelrevolver, Sternrevolver oder Kronenrevolver im oben definierten Sinn sein. Bei jeder dieser Ausgestaltungen des Spreizdornrevolvers kann die Erfindung dadurch weitergebildet sein, dass

  • mit dem Spreizdornrevolver ein Orientierrevolver zu gemeinsamer Drehung um die Achse verbunden ist und
  • jedem Spreizdorn eine Orientiervorrichtung am Orientierrevolver gleichachsig zugeordnet ist.
The machine according to the invention preferably has, in accordance with the two earlier patent applications mentioned, an expanding mandrel turret which can be driven in rotation about a central axis and carries a plurality of expanding mandrels arranged around the central axis. The expanding mandrel turret can be a drum turret, star turret or crown turret as defined above Be meaningful. In each of these configurations of the expanding mandrel turret, the invention can be further developed in that
  • with the expanding mandrel turret, an orientation turret is connected to rotate together about the axis and
  • an orientation device on the orientation turret is assigned coaxially to each expanding mandrel.

Bei Verwendung eines Spreizdornrevolvers, vorzugsweise eines Trommelrevolvers im oben definierten Sinn, ist es ferner zweckmässig, wenn die Zuführ-Fördereinrichtung zum Zuführen roher Zargen und ein Abführförderer zum Abführen fertiger Zargen eine Zwischenetage definieren, die zwischen einer von den Orientiervorrichtungen definierten Orientieretage und einer von den Spreizdornen definierten Spreizetage angeordnet ist.When using an expanding mandrel turret, preferably a drum turret in the sense defined above, it is furthermore expedient if the feed conveyor device for feeding raw frames and a discharge conveyor for removing finished frames define an intermediate floor, which is between an orientation floor defined by the orientation devices and one of them Spreading mandrel defined spreading floor is arranged.

Die genannten Etagen haben voneinander vorzugsweise Abstände, die Kollisionen von in unterschiedlichen Etagen angeordneten Zargen ausschliessen.In diesem Fall ist es möglich, jede einzelne Zarge insgesamt mehr als einen vollen Umlauf ausführen zu lassen, beispielsweise mit dem Orientierrevolver und mit dem Spreizrevolver je drei Viertel einer Umdrehung, damit für das Orientieren und für das Verformen jeder Zarge reichlich Zeit zur Verfügung steht und die Zargen die Maschine dennoch in kurzen Zeitabständen verlassen.The above-mentioned levels preferably have distances from one another that rule out collisions between frames arranged in different levels, in which case it is possible to have each individual frame complete more than one full cycle, for example with the orientation turret and with the expanding turret, three quarters each Rotation, so that there is plenty of time for orienting and deforming each frame and the frames still leave the machine at short intervals.

In der Aufschiebevorrichtung ist vorzugsweise der erste Greifer ein Zangengreifer und der zweite Greifer ein Magnetgreifer.In the slide-on device, the first gripper is preferably a tong gripper and the second gripper is a magnetic gripper.

Die Maschine arbeitet selbst bei hoher Drehgeschwindigkeit besonders ruhig, wenn die beiden Revolver während des Orientierens und Verformens der Zargen kontinuierlich drehbar sind.The machine works particularly smoothly even at high turning speeds if the two revolvers can be rotated continuously while orienting and deforming the frames.

Trotz ihrer kontinuierlichen Arbeitsweise kann die erfindungsgemässe Maschine mit einer Prägevorrichtung für Prägungen an Seitenflächen der Zargen ausgestattet sein, wenn diese an einem Ausleger angeordnet ist, der im Gleichlauf mit den beiden Revolvern um die zentrale Achse schwenkbar und gegenläufig zurückschwenkbar ist.Despite its continuous operation, the machine according to the invention can be equipped with an embossing device for embossing on the side surfaces of the frames, if this is arranged on a boom which can be pivoted about the central axis in the same direction as the two revolvers and can be pivoted back in the opposite direction.

Ein Ausführungsbeispiel mit weiteren Einzelheiten der Erfindung wird im folgenden anhand schematischer Zeichnungen erläutert. Es zeigen:

Fig. 1
eine perspektivische Gesamtansicht einer Maschine zum Verändern der Querschnittsform gerundeter Zargen,
Fig. 2
einen vergrößerten Ausschnitt aus Fig. 1,
Fig. 3
die teilweise als senkrechter Schnitt gezeichnete Ansicht in Richtung des Pfeils III in Fig. 2,
Fig. 4
den waagerechten Teilschnitt IV-IV in Fig. 3,
Fig. 5
die teilweise als senkrechter Schnitt dargestellte Ansicht in Richtung des Pfeils V in Fig. 2 und
Fig. 6
die zu Fig. 5 gehörige Draufsicht.
An embodiment with further details of the invention is explained below with reference to schematic drawings. Show it:
Fig. 1
1 shows an overall perspective view of a machine for changing the cross-sectional shape of rounded frames,
Fig. 2
2 shows an enlarged detail from FIG. 1,
Fig. 3
the partially drawn as a vertical section view in the direction of arrow III in Fig. 2,
Fig. 4
the horizontal partial section IV-IV in Fig. 3,
Fig. 5
the view partially shown as a vertical section in the direction of arrow V in Fig. 2 and
Fig. 6
the top view associated with FIG. 5.

Auf der dargestellten Maschine werden ursprünglich zylindrische Zargen 10, die eine geschweißte Längsnaht 12 haben, derart aufgeweitet, daß sie einen abgerundet-rechteckigen Querschnitt erhalten, der an einem Ende größer ist als am anderen; außerdem werden die Zargen 10 mit seitlichen, sickenartigen Prägungen 14 versehen.On the machine shown, originally cylindrical frames 10, which have a welded longitudinal seam 12, are expanded in such a way that they obtain a rounded-rectangular cross section which is larger at one end than at the other; in addition, the frames 10 are provided with lateral, bead-like embossments 14.

Die zylindrischen Zargen 10 werden aufrechtstehend, im übrigen jedoch ungeordnet, einem Zuführförderer 16 zugeführt. Zu diesem gehört ein Förderband 18, das mit stufenlos einstellbarer Geschwindigkeit angetrieben wird; hierzu ist das Förderband 18 über ein Variatorgetriebe 20, einen Kettentrieb 22, eine Gelenkwelle 24 und ein Verzweigungsgetriebe 26 mit einem Hauptmotor 28 verbunden, der auch eine zentrale senkrechte Welle 30 antreibt. Die geometrische Achse dieser Welle 30 wird im folgenden als zentrale Achse A bezeichnet.The cylindrical frames 10 are fed upright, but otherwise disordered, to a feed conveyor 16. This includes a conveyor belt 18 which is driven at a continuously adjustable speed; for this purpose, the conveyor belt 18 is connected to a main motor 28, which also drives a central vertical shaft 30, via a variator gear 20, a chain drive 22, a cardan shaft 24 and a branching gear 26. The geometrical The axis of this shaft 30 is referred to below as the central axis A.

Zum Zuführförderer 16 gehört ferner eine waagrechte Förderschnecke 32, von der die Zargen 10 einzeln einem Zuteilrad 34 zugeführt werden, das mit dem Zuführförderer 16 eine Zuführ-Fördereinrichtung bildet und das um eine senkrechte Achse drehbar ist und an seinem Rand in gleichmässigen Abständen Aussparungen 36 für je eine Zarge aufweist. Die Bewegungsbahn der vom Zuteilrad 34 erfassten Zargen 10 ist radial nach aussen durch einen zylindrischen Wandabschnitt 38 begrenzt.The feed conveyor 16 also includes a horizontal screw conveyor 32, from which the frames 10 are individually fed to a metering wheel 34, which forms a feed conveyor device with the feed conveyor 16 and which is rotatable about a vertical axis and has recesses 36 for it at regular intervals on its edge each has a frame. The movement path of the frames 10 gripped by the metering wheel 34 is delimited radially outwards by a cylindrical wall section 38.

Der zylindrische Wandabschnitt 38 endet oberhalb eines Spreizdornrevolvers 40, der an der Welle 30 befestigt und mit dieser um die zentrale Achse A drehbar ist. Am Spreizdornrevolver 40 sind rings um die zentrale Achse A zwölf Spreizdorne 42 in gleichmässigen Abständen angeordnet.The cylindrical wall section 38 ends above an expanding mandrel turret 40 which is fastened to the shaft 30 and can be rotated with it about the central axis A. On the mandrel turret 40, twelve mandrels 42 are arranged around the central axis A at regular intervals.

Jeder Spreizdorn 42 hat einen am Spreizdornrevolver 40 befestigten ringförmigen Stützkörper 44, vier Segmentstangen 46, die in bezug auf den Stützkörper 44 radial bewegbar sind, und einen Spreizkeil 48 (Fig. 3). Der Spreizkeil 48 jedes Spreizdorns 42 ist längs dessen Achse, der Spreizachse B, verschiebbar, um die zugehörigen Segmentstangen 46 auseinanderzuspreizen. Zum Rückstellen der Segmentstangen 46 sind nicht dargestellte Rückstellfedern vorgesehen. Ausführungsbeispiele der Spreizdorne 42 ergeben sich aus den genannten älteren Patentanmeldungen.Each expanding mandrel 42 has an annular support body 44 fastened to the expanding mandrel turret 40, four segment rods 46, which can be moved radially with respect to the supporting body 44, and an expanding wedge 48 (FIG. 3). The expanding wedge 48 of each expanding mandrel 42 can be displaced along its axis, the expanding axis B, in order to spread apart the associated segment rods 46. Return springs (not shown) are provided for resetting the segment rods 46. Exemplary embodiments of the expanding mandrels 42 result from the older patent applications mentioned.

Im dargestellten Beispiel sind die Spreizdornachsen B parallel zur zentralen Achse A angeordnet. Jeder Spreizkeil 48 ist an einem axialen Schaft 50 befestigt und trägt ein Paar achsparallele Führungsstangen 52, die im Spreizdornrevolver 40 geführt sind. Am vom Spreizkeil 48 entfernten, im dargestellten Beispiel unteren Ende jedes Schafts 50 ist eine Kurvenfolgerolle 54 gelagert. Die Kurvenfolgerollen 54 sämtlicher Spreizdorne 42 laufen auf einem gemeinsamen Kurvenkörper 56, der gleichachsig mit dem Spreizdornrevolver 40 ortsfest angeordnet und so gestaltet ist, daß jeder Spreizdorn 42 bei einem vollen Umlauf des Spreizdornrevolvers 40 einen vollständigen Arbeitszyklus ausführt.In the example shown, the expanding mandrel axes B are arranged parallel to the central axis A. Each expanding wedge 48 is fastened to an axial shaft 50 and carries a pair of axially parallel guide rods 52 which are guided in the expanding mandrel turret 40. At the lower end of the expanding wedge 48, in the example shown the lower end of each A cam follower roller 54 is mounted on the shaft 50. The cam followers 54 of all expanding mandrels 42 run on a common cam body 56 which is arranged coaxially with the expanding mandrel turret 40 and is designed such that each expanding mandrel 42 executes a complete working cycle when the expanding mandrel turret 40 rotates fully.

Die zentrale Welle 30 erstreckt sich oberhalb des Spreizdornrevolvers 40 durch einen ortsfesten, rohrförmigen Achskörper 58 hindurch. Oberhalb des Achskörpers 58 ist auf der zentralen Welle 30 ein Orientierrevolver 60 befestigt, an dem in gleichen Winkelabständen zwölf Orientiervorrichtungen 62 gelagert sind.The central shaft 30 extends above the expanding mandrel turret 40 through a stationary, tubular axle body 58. Above the axle body 58, an orienting turret 60 is fastened on the central shaft 30, on which twelve orienting devices 62 are mounted at equal angular intervals.

Die Orientiervorrichtungen 62 sind gleichachsig mit je einem der Spreizdorne 40 angeordnet und um die zugehörige Spreizdornachse B drehbar. Im dargestellten Beispiel sind die Orientiervorrichtungen 62 becherförmige, permanent magnetisierte Metallteile, die sich nach unten derart erweitern, daß sie je eine der vom Zuteilrad 34 herangeförderten zylindrischen Zargen 10 an ihrem oberen Rand überfassen, zentrieren und festhalten können.The orienting devices 62 are arranged coaxially with one of the expanding mandrels 40 and rotatable about the associated expanding mandrel axis B. In the example shown, the orienting devices 62 are cup-shaped, permanently magnetized metal parts which expand downwards in such a way that they can each grasp, center and hold one of the cylindrical frames 10 conveyed by the metering wheel 34 at their upper edge.

Jeder Orientiervorrichtung 62 ist ein an der Oberseite des Orientierrevolvers 60 befestigter Schrittmotor 64 sowie ein an der Unterseite des Orientierrevolvers befestigter Sensor 66 und ein Verstärker 68 zugeordnet. Der Sensor 66 ist im dargestellten Beispiel ein Lichttaster, der ein Signal abgibt, wenn die Längsnaht 12 der an der zugehörigen, sich drehenden Orientiervorrichtung 62 hängenden Zarge 10 eine vorbestimmte Stellung einnimmt. Dieses Signal wird vom zugehörigen Verstärker 68 verstärkt und bewirkt, daß der zugehörige Schrittmotor 64 stehenbleibt, wenn die Längsnaht 12 ihre vorbestimmte Stellung erreicht hat. Im dargestellten Beispiel ist die vorbestimmte Stellung diejenige, in der die Längsnaht 12 in der mit einem Pfeil C in Fig. 1 und 2 angedeuteten Richtung der gemeinsamen Drehung des Spreizdornrevolvers 40 und Orientierrevolvers 60 nach vorne weist.Each orientation device 62 is assigned a stepping motor 64 attached to the top of the orientation turret 60, a sensor 66 attached to the bottom of the orientation turret, and an amplifier 68. In the example shown, the sensor 66 is a light sensor that emits a signal when the longitudinal seam 12 of the frame 10 hanging on the associated rotating orienting device 62 assumes a predetermined position. This signal is amplified by the associated amplifier 68 and causes the associated stepper motor 64 to stop when the longitudinal seam 12 reaches its predetermined position Has. In the example shown, the predetermined position is that in which the longitudinal seam 12 points forward in the direction of the common rotation of the expanding mandrel turret 40 and the orientation turret 60 indicated by an arrow C in FIGS. 1 and 2.

Jedem Spreizdorn 42 und der zugehörigen Orientiervorrichtung 62 ist eine Aufschiebevorrichtung 70 zugeordnet, die gemeinsam mit dem Spreizdornrevolver 40 und Orientierrevolver 60 umläuft. Jede der insgesamt zwölf Aufschiebevorrichtungen 70 hat einen zangenartig zweiarmigen oberen Greifer 72 und einen einarmigen magnetischen unteren Greifer 74, die beide radial und parallel zur zentralen Achse A beweglich sind. Den oberen Greifern 72 sämtlicher Aufschiebevorrichtungen 70 sind eine gemeinsame, von einer Nut gebildete Kurve 76 für parallel zur Hauptachse A auf-und niedergehende Hubbewegungen sowie eine gemeinsame Kurve 78 für Öffnungs- und Schließbewegungen zugeordnet. In entsprechender Weise sind den unteren Greifern 74 sämtlicher Aufschiebevorrichtungen 70 eine gemeinsame Kurve 80 für Hubbewegungen und eine weitere gemeinsame Kurve 82 für radiale Bewegungen zugeordnet. Sämtliche genannten Kurven sind ortsfest am Achskörper 58 angeordnet.A slide-on device 70 is assigned to each expanding mandrel 42 and the associated orienting device 62, which rotates together with the expanding mandrel turret 40 and the orienting turret 60. Each of the twelve push-on devices 70 in total has a two-armed upper gripper 72 and a one-armed magnetic lower gripper 74, both of which are movable radially and parallel to the central axis A. The upper grippers 72 of all push-on devices 70 are assigned a common curve 76, formed by a groove, for lifting movements rising and falling parallel to the main axis A, and a common curve 78 for opening and closing movements. Correspondingly, the lower grippers 74 of all push-on devices 70 are assigned a common curve 80 for lifting movements and a further common curve 82 for radial movements. All of the curves mentioned are arranged in a stationary manner on the axle body 58.

Die Höhenlage, in der sich die Zargen 10 auf dem Zuführförderer 16 befinden, wird im folgenden als Zwischenetage E1 bezeichnet. Die Kurven 76 und 78 sind so gestaltet, daß jeder obere Greifer 72, wenn er eine bestimmte Stellung am Rand des Zuteilrades 34 erreicht, die dort gleichzeitig in Richtung des Pfeils D ankommende zylindrische Zarge 10 zangenartig erfaßt, mitnimmt und dann längs der zugehörigen Spreizdornachse B aus der Zwischenetage E1 nach oben in eine Orientieretage E2 hebt. Dabei wird die Zarge 10 in die zugehörige Orientiervorrichtung 62 hineingeschoben, von ihr zentriert und durch Magnetkraft festgehalten. Der Greifer 72 wird dann geöffnet, so daß die Zarge 10 mit der Orientiervorrichtung 62 um die zugehörige Spreizdornachse B gedreht werden kann, bis die Längsnaht 12 die gewünschte Orientierung erreicht hat.The height at which the frames 10 are located on the feed conveyor 16 is referred to below as the intermediate floor E1. The curves 76 and 78 are designed so that each upper gripper 72, when it reaches a certain position on the edge of the metering wheel 34, grips the cylindrical frame 10 arriving in the direction of arrow D at the same time, takes it along and then along the associated expanding mandrel axis B. from the intermediate floor E1 up to an orientation floor E2. The frame 10 is pushed into the associated orientation device 62, centered by it and held by magnetic force. The The gripper 72 is then opened so that the frame 10 can be rotated with the orienting device 62 about the associated expanding mandrel axis B until the longitudinal seam 12 has reached the desired orientation.

Währenddessen drehen sich die Revolver 40 und 60 stetig weiter, beispielsweise um 210°. Sobald die betreffende Orientiervorrichtung 62 durch Abschalten des zugehörigen Schrittmotors 64 stillgesetzt worden ist, wird der zugehörige obere Greifer 72 wieder geschlossen und bewegt die betreffende Zarge 10 von der Orientiervorrichtung 62 weg nach unten in die Zwischenetage E1, also in diejenige Höhenlage, in der die Zarge 10 auf dem Zuführförderer 16 angekommen ist.In the meantime, the revolvers 40 and 60 keep rotating, for example by 210 °. As soon as the relevant orienting device 62 has been stopped by switching off the associated stepping motor 64, the associated upper gripper 72 is closed again and moves the relevant frame 10 downward from the orienting device 62 into the intermediate level E1, i.e. into the height position at which the frame 10 has arrived on the feed conveyor 16.

In der Zwischenetage E1 wird die Zarge 10 vom zugehörigen unteren Greifer 74 magnetisch erfaßt, um dann weiter nach unten bewegt und dabei in Richtung der Spreizdornachse B des zugehörigen Spreizdorns 42 auf diesen aufgesteckt zu werden. Die Höhenlage, in der sich die Zarge 10 nun befindet, wird als Spreizetage E3 bezeichnet. Während der Verschiebung der Zarge 10 aus der Orientieretage E2 in die Spreizetage E3 haben sich die Revolver 40 und 60 beispielsweise um 60° weitergedreht.In the intermediate level E1, the frame 10 is magnetically grasped by the associated lower gripper 74, in order then to be moved further downward and to be plugged onto the associated expanding mandrel 42 in the direction of the expanding mandrel axis B. The height at which the frame 10 is now located is referred to as the spreading level E3. During the displacement of the frame 10 from the orientation level E2 into the spreading level E3, the revolvers 40 and 60 have rotated for example by 60 °.

Auf dem Spreizdorn 42 wird die Zarge 10 in üblicher Weise geweitet. Auch dabei wird jedoch bei der dargestellten Maschine die Drehung der Revolver 40 und 60 nicht unterbrochen. Nach einer Bewegung der Revolver 40 und 60 um beispielsweise weitere 210° um die zentrale Achse A ist die vom Spreizdorn 42 selbst bewirkte Verformung der Zarge 10 abgeschlossen. Anschließend wird die Zarge 10 vom zugehörigen Greifer 74 nach oben in die Zwischentage E1 zurückbewegt und dabei vom Spreizdorn 42 abgezogen.The frame 10 is widened in the usual way on the expanding mandrel 42. Here too, however, the rotation of the revolvers 40 and 60 is not interrupted in the illustrated machine. After the revolvers 40 and 60 have moved by, for example, a further 210 ° about the central axis A, the deformation of the frame 10 caused by the expanding mandrel 42 itself is completed. Subsequently, the frame 10 is moved back up into the intermediate days E1 by the associated gripper 74 and is thereby pulled off the expanding mandrel 42.

Nun hat die Zarge 10 den Arbeitsbereich einer Prägevorrichtung 84 erreicht. Diese ist an einem radialen Ausleger 86 angeordnet, der von einem Kurvensatz 88 angetrieben, in einem Winkelbereich von beispielsweise 20° um die zentrale Achse A hin- und herschwenkbar ist. Die Prägevorrichtung 84 erzeugt bei ununterbrochener Drehung der Revolver 40 und 60 die seitlichen Prägungen 14, welche die inzwischen rechteckig und konisch verformte Zarge 10 versteifen. Sobald die Prägungen 14 ausgeführt sind, kehrt die Prägevorrichtung 84 in ihre Ausgangsstellung zurück, um die auf dem nächsten Spreizdorn 42 ankommende Zarge 10 zu prägen.The frame 10 has now reached the working area of an embossing device 84. This is arranged on a radial arm 86, which is driven by a set of curves 88 and can be pivoted back and forth in an angular range of, for example, 20 ° about the central axis A. With continuous rotation of the revolvers 40 and 60, the embossing device 84 produces the lateral embossments 14, which stiffen the now rectangular and conically deformed frame 10. As soon as the embossings 14 have been carried out, the embossing device 84 returns to its starting position in order to emboss the frame 10 arriving on the next expanding mandrel 42.

Währenddessen ist die schon mit den Prägungen 14 versehene und dadurch fertiggestellte Zarge 10 durch die weiter fortgeschrittene Drehung der Revolver 40 und 60 zu einem Abführförderer 90 gelangt. Zu diesem gehört ein Paar magnetischer Teller 92, die ebenfalls vom Hauptmotor 28 um eine senkrechte Achse gedreht werden. Die fertige Zarge 10 wird durch eine nicht dargestellte stationäre Abweisschiene vom Greifer 74 getrennt und von den Tellern 92 bis zu einem waagerechten Förderband 94 mitgenommen, das in der Zwischenetage E1, also in gleicher Höhe, angeordnet ist wie das Förderband 18 des Zuführförderers 16. Das Förderband 94 wird synchron mit den Tellern 92 und den Revolver 40 und 60 über eine Gelenkwelle 96 vom Hauptmotor 28 angetrieben und ist magnetisiert, so daß es die fertige Zarge 10 weiterfördert, nachdem diese durch eine weitere nicht dargestellte Abweisschiene von den Tellern 92 getrennt worden ist.In the meantime, the frame 10, which has already been provided with the embossments 14 and is thereby finished, has reached a discharge conveyor 90 due to the more advanced rotation of the revolvers 40 and 60. This includes a pair of magnetic plates 92 which are also rotated about a vertical axis by the main motor 28. The finished frame 10 is separated from the gripper 74 by a stationary deflecting rail, not shown, and taken from the plates 92 to a horizontal conveyor belt 94, which is arranged on the mezzanine floor E1, that is to say at the same height as the conveyor belt 18 of the feed conveyor 16. The Conveyor belt 94 is driven synchronously with the plates 92 and the revolvers 40 and 60 by means of a cardan shaft 96 from the main motor 28 and is magnetized so that it further conveys the finished frame 10 after it has been separated from the plates 92 by another deflecting rail, not shown .

Bei ausgeschaltetem Hauptmotor 28 läßt sich die gesamte Maschine zum Einrichten der einzelnen Vorrichtungen oder zum Beheben von Störungen mit einem Handrad 98 drehen.When the main motor 28 is switched off, the entire machine can be rotated with a handwheel 98 to set up the individual devices or to rectify faults.

Einzelheiten der Greifer 72 und 74 sind in Fig. 3 dargestellt. Jeder der oberen Greifer 72 hat, wie auch aus Fig. 4 ersichtlich ist, einen Greiferschlitten 100, der an einem am Orientierrevolver 60 befestigten senkrechten Stangenpaar, nämlich einer radial inneren Stange 102 und einer radial äußeren Stange 104 verschiebbar ist. Für die Verschiebung des Greiferschlittens 100 sorgt die erwähnte Kurve 76. Am Greiferschlitten 100 sind zwei Greifarme 106 um die Stange 102 schwenkbar gelagert, die je einen Greifbacken 108 tragen und von der erwähnten Kurve 78 mittelbar gesteuert sind. Die mittelbare Steuerung umfaßt einen Schlepphebel 110, der an der Kurve 78 entlangläuft und an einer weiteren senkrechten Stange 112 befestigt ist. Die Stange 112 ist am Orientierrevolver 60 drehbar gelagert und hat ein Nockenprofil, an dem die Greifbacken 108 sich über je eine Rolle 114 abstützen.Details of the grippers 72 and 74 are shown in FIG. 3. As can also be seen from FIG. 4, each of the upper grippers 72 has a gripper carriage 100 which can be displaced on a pair of vertical rods attached to the orienting turret 60, namely a radially inner rod 102 and a radially outer rod 104. The mentioned curve 76 ensures the displacement of the gripper carriage 100. Two gripper arms 106 are pivotally mounted on the gripper carriage 100 about the rod 102, each of which carries a gripper jaw 108 and is indirectly controlled by the mentioned curve 78. The indirect control comprises a rocker arm 110 which runs along the curve 78 and is fastened to a further vertical rod 112. The rod 112 is rotatably mounted on the orienting turret 60 and has a cam profile on which the gripping jaws 108 are supported via a roller 114 each.

Jeder der unteren Greifer 74 hat einen Greiferschlitten 116, der an einem senkrechten Stangenpaar 118 verschiebbar geführt ist. Das Stangenpaar 118 ist am Spreizdornrevolver 40 befestigt. Am Greiferschlitten 118 ist ein radiales Stangenpaar 120 verschiebbar geführt, an dem außen ein magnetischer Greifbacken 122 befestigt und radial innen eine Rolle 124 um eine waagerechte Achse drehbar gelagert ist. Die Rolle 124 ist an einer Wälzbahn 126 abwälzbar, die an einem radialen Stangenpaar 128 verschiebbar geführt und von der erwähnten Kurve 82 gesteuert ist.Each of the lower grippers 74 has a gripper slide 116, which is guided on a pair of vertical rods 118 so that it can slide. The pair of rods 118 is attached to the expanding mandrel turret 40. A radial pair of rods 120 is displaceably guided on the gripper slide 118, to which a magnetic gripping jaw 122 is fastened on the outside and a roller 124 is mounted radially on the inside so that it can rotate about a horizontal axis. The roller 124 can be rolled on a roller track 126, which is displaceably guided on a radial pair of rods 128 and is controlled by the curve 82 mentioned.

Die Prägevorrichtung 84 ist in Fig. 5 und 6 näher dargestellt. Am Ausleger 86 ist ein Paar Backenträger 130 um je einen waagerechten Achszapfen 132 schwenkbar gelagert. Am unteren Ende jedes Backenträgers 130 ist ein Prägebacken 134 auf einem Achszapfen 136 gelagert, der sich parallel zu den Achszapfen 132 erstreckt. Am oberen Ende jedes Backenträgers 130 ist eine Rolle 138 gelagert. Zwischen den Rollen 138 ist am Ausleger 86 ein Nocken 140 gelagert, der von einem Stößel 142 gesteuert wird. Der Stößel 142 ist am Ausleger 86 radial in bezug zur zentralen Achse A verschiebbar geführt und von einer Feder 144 derart radial nach außen belastet, daß eine am äußeren Ende des Stößels 142 gelagerte Rolle 146 an einer ortsfesten Steuerkurve 148 anliegend gehalten wird. Dies hat zur Folge, daß bei Schwenkungen des Auslegers 86 um die zentrale Achse A der Stößel 142 radiale Bewegungen ausführt, durch welche die Prägebacken 134 zueinander hin und voneinander weg bewegt werden.The embossing device 84 is shown in more detail in FIGS. 5 and 6. On the arm 86, a pair of jaw supports 130 is pivotally mounted about a horizontal axle 132. At the lower end of each jaw carrier 130, an embossing jaw 134 is mounted on a journal 136, which extends parallel to the journal 132. A roller 138 is mounted at the upper end of each jaw carrier 130. Between The rollers 138 are supported on the boom 86 by a cam 140 which is controlled by a tappet 142. The plunger 142 is guided on the arm 86 so as to be radially displaceable with respect to the central axis A and is loaded radially outward by a spring 144 in such a way that a roller 146 mounted on the outer end of the plunger 142 is held against a stationary control cam 148. As a result, when the boom 86 is pivoted about the central axis A, the plunger 142 executes radial movements, by means of which the stamping jaws 134 are moved towards and away from one another.

Um den Ausleger 86 periodisch gleichlaufend mit den Revolvern 40 und 60 um die zentrale Achse A zu schwenken und anschließend zurückzuschwenken, ist der Prägevorrichtung 84 eine waagerechte Steuerwelle 150 zugeordnet, die vom Hauptmotor 28 angetrieben wird. Auf der Steuerwelle 150 ist ein Paar genutete Kurvenscheiben 152 befestigt, von denen ein Paar Hebelarme 154 gesteuert wird. Die beiden Hebelarme 154 sind fest mit einem ungefähr rechtwinklig zu ihnen angeordneten Hebelarm 156 verbunden, der über eine Koppelstange 158 von einstellbarer Länge mit einem Arm eines Winkelhebels 160 verbunden ist. Der Winkelhebel 160 ist um einen senkrechten Achszapfen 162 schwenkbar und hat einen zweiten Arm, der durch eine weitere Koppelstange 164 von einstellbarer Länge mit dem Ausleger 86 verbunden ist.In order to periodically pivot the boom 86 in synchronism with the revolvers 40 and 60 about the central axis A and then pivot it back, the embossing device 84 is assigned a horizontal control shaft 150 which is driven by the main motor 28. A pair of grooved cams 152 are attached to the control shaft 150, of which a pair of lever arms 154 are controlled. The two lever arms 154 are firmly connected to a lever arm 156 arranged approximately at right angles to them, which is connected to an arm of an angle lever 160 via a coupling rod 158 of adjustable length. The angle lever 160 is pivotable about a vertical axle 162 and has a second arm which is connected to the boom 86 by a further coupling rod 164 of adjustable length.

Claims (8)

  1. Machine for altering the cross-sectional shape of rounded bodies (10), particularly for cans, which have a longitudinal seam (12), having
    - at least one expanding mandrel (42) which comprises a plurality of segmental bars (46) which are arranged around an expanding-mandrel axis (B) and can be spread apart,
    - a feeding and conveying device (16, 34) with which the bodies (10) are brought into a position coaxial with an expanding mandrel (42), and
    - a loading device (70) for pushing one body (10) at a time onto the expanding mandrel (42),
    the longitudinal seam (12) of the bodies (10), before the latter are pushed on, assuming a specified position relative to the segmental bars (46),
    characterised in that
    - the loading device (70) comprises, for each expanding mandrel (42), two grippers (72, 74) which are offset in relation to one another in the direction of the expanding-mandrel axis (B) and can be moved backwards and forwards jointly in the direction of this axis, of which an upper gripper (72) is provided for the displacement of one body at a time (10) from the feeding and conveying device (16, 34) to an orientation device (62) in the form of a mount, and for a first portion of the displacement of the body (10) from the orientation device (62) to the associated expanding mandrel (42), while a lower gripper (74) is provided for the rest of the displacement of the body (10) towards the expanding mandrel (42) and for the removal of the shaped body (10) from the expanding mandrel (42),
    - associated with the upper grippers (72) is a common first cam (76) for up-and-down lifting movements parallel to a principal axis (A) and a common second cam (78) for opening and closing movements of the grippers (72), and
    - associated with the lower grippers (74) is a common first cam (80) for lifting movements and a second common cam (82) for movements of the grippers (74) radial to the said principal axis (A),
    the said cams (76, 78, 80, 82) being fixedly arranged on an axial member (58).
  2. Machine according to claim 1, characterised in that the orientation device (62), with the body (10) held by it, can be driven in rotation by a stepping motor (64) arranged coaxially with the expanding mandrel (42), and in that a sensor (66) is provided which interrupts the rotation of the orientation device (62) when the longitudinal seam (12) of the body (10) reaches the position specified.
  3. Machine according to claim 1, having an expanding-mandrel turret (40) which can be driven in rotation about a central axis (A) and carries a plurality of expanding mandrels (42) arranged around the central axis (A),
    characterised in that
    - an orientation turret (60) is connected to the expanding-mandrel turret (40) for joint rotation about the axis (A), and
    - an orientation device (62) on the orientation turret (60) is associated coaxially with each expanding mandrel (42).
  4. Machine according to claim 3, characterised in that the feeding and conveying device (16, 34) for supplying unaltered bodies (10) and a delivery conveyor (90) for removing finished bodies (10) define an intermediate level (E1) which is disposed between an orientation level (E2) defined by the orientation devices (62) and an expanding level (E3) defined by the expanding mandrels (42).
  5. Machine according to claim 4, characterised in that said levels (E1, E2, E3) are at distances apart that rule out collisions between bodies (10) situated at different levels.
  6. Machine according to claim 1, characterised in that the first gripper (72) is a pincer gripper and the second gripper (74) is a magnetic gripper.
  7. Machine according to any one of claims 3 to 6, characterised in that the two turrets (40, 60) are continuously rotatable during the orientation and shaping of the bodies (10).
  8. Machine according to claim 7 with an impressing device (84) for impressions (14) in side faces of the bodies (10), characterised in that the impressing device (84) is disposed on an arm (86) which can be swung about the central axis (A) in synchronism with the two turrets (40, 60) and can be swung back again in the opposite direction.
EP19890111046 1988-07-19 1989-06-19 Machine for changing the cross-sectional shape of round casings, in particular for caps Expired - Lifetime EP0351560B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2764/88 1988-07-19
CH276488A CH676210A5 (en) 1988-07-19 1988-07-19

Publications (3)

Publication Number Publication Date
EP0351560A2 EP0351560A2 (en) 1990-01-24
EP0351560A3 EP0351560A3 (en) 1990-10-17
EP0351560B1 true EP0351560B1 (en) 1993-12-01

Family

ID=4241088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890111046 Expired - Lifetime EP0351560B1 (en) 1988-07-19 1989-06-19 Machine for changing the cross-sectional shape of round casings, in particular for caps

Country Status (3)

Country Link
EP (1) EP0351560B1 (en)
CH (1) CH676210A5 (en)
DE (2) DE3828879A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE115447T1 (en) * 1990-01-26 1994-12-15 American National Can Co METHOD AND APPARATUS FOR MANUFACTURING CONTAINERS.
DE4408150A1 (en) * 1994-03-11 1995-09-14 Krupp Maschinentechnik Can making machine
GB9525391D0 (en) * 1995-12-12 1996-02-14 Metal Box Plc Orientation of cans
DE10034907A1 (en) * 2000-07-18 2002-01-31 Khs Masch & Anlagenbau Ag Machine for handling bottles, cans or similar containers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT218833B (en) * 1959-05-20 1961-12-27 Rudi Ing Lueddecke Method and device for producing non-round can bodies
JPS59163041A (en) * 1983-03-08 1984-09-14 Toyo Seikan Kaisha Ltd Holder for can body of rotary expander
CH673790A5 (en) * 1987-07-07 1990-04-12 Elpatronic Ag
CH674165A5 (en) * 1988-03-15 1990-05-15 Elpatronic Ag

Also Published As

Publication number Publication date
CH676210A5 (en) 1990-12-28
DE3828879A1 (en) 1990-01-25
DE58906286D1 (en) 1994-01-13
EP0351560A2 (en) 1990-01-24
EP0351560A3 (en) 1990-10-17
DE3828879C2 (en) 1990-07-26

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