EP0413955B1 - Device for rounding and conveying on sheet blanks for can shells - Google Patents

Device for rounding and conveying on sheet blanks for can shells Download PDF

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Publication number
EP0413955B1
EP0413955B1 EP90113603A EP90113603A EP0413955B1 EP 0413955 B1 EP0413955 B1 EP 0413955B1 EP 90113603 A EP90113603 A EP 90113603A EP 90113603 A EP90113603 A EP 90113603A EP 0413955 B1 EP0413955 B1 EP 0413955B1
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EP
European Patent Office
Prior art keywords
metal blank
sheet
bending
rounded
guide rail
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
EP90113603A
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German (de)
French (fr)
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EP0413955A3 (en
EP0413955A2 (en
Inventor
Othmar Stieger
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Elpatronic AG
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Elpatronic AG
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Publication date
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Priority to AT90113603T priority Critical patent/ATE88388T1/en
Publication of EP0413955A2 publication Critical patent/EP0413955A2/en
Publication of EP0413955A3 publication Critical patent/EP0413955A3/en
Application granted granted Critical
Publication of EP0413955B1 publication Critical patent/EP0413955B1/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
    • 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
    • B21D51/2676—Cans or tins having longitudinal or helical seams

Definitions

  • a device of this type is known from DE-A-23 19 447.
  • the sheet metal blank must be moved axially, with its two edges guided on the guide rail being inserted into a groove in a subsequent so-called Z-rail.
  • two devices are provided for this purpose in a device according to DE-A-33 30 171, which are arranged below the bending rollers and on both sides outside the area of the rounded sheet metal blank and grasp each with carriers from the outside over the edge of the sheet metal blank in order to push it further axially.
  • the invention is based on the object of making the means for the axial conveyance of the rounded sheet metal blanks more space-saving and with less installation effort in a device of the type mentioned.
  • the means for further conveying the sheet metal blanks in the length range of the bending rollers require practically no space outside of the rounded blanks.
  • This also means that the arrangement of guide shells which surround the space occupied by the rounded blank is no longer impaired. Since the rod-shaped conveying elements engage close to the guided edges of the rounded blank (seen in its cross section), their position does not have to be adapted to the respective diameter.
  • the lines of action of the feed forces exerted by the conveying members on the sheet metal blank are adjacent to the frictional guides of the longitudinal edges, which is why the sheet metal blank is only exposed to slight canting moments during its axial movement.
  • a push rod is arranged on the slide at a distance from the two conveyor members and essentially parallel to them outside the space enclosed by the rounded sheet metal blank, which, in addition to the two conveyor members and against them, with a pawl mounted on it Angle offset attacks at the rear edge of the rounded sheet metal blank. In this way, the feed forces required for axially moving the rounded sheet metal blank can be distributed evenly.
  • the carriage can be driven via a crank drive which has a crank attached to an output shaft and a connecting rod with two connecting rod parts which telescopically guided to each other and connected to each other by a latching device which triggers when overloaded.
  • the articulated coupling drive preferably has two cranks that bwz on the drive shaft. attached to the output shaft and connected to each other by a coupling member of adjustable length.
  • the length of the coupling element can be changeable, for example.
  • flat sheet metal blanks 10 are rounded cylindrically and welded at their edges parallel to the cylinder axis.
  • the devices required for these operations are arranged on a common machine frame 11. 2, coming from a stacking device (not shown), is fed to a round station 13 in a horizontal direction of movement 12 and leaves it rounded in a likewise horizontal direction of movement 14, which includes a right angle with the original direction of movement 12, and becomes one Welding station 15 supplied.
  • the round station 13 includes a pair of horizontally lying, vertically superposed transport rollers 16 and 17, which can be driven together to convey a sheet metal blank 10 in the direction of movement 12 through an adjustable roller gap formed between them.
  • a table 20 adjoins the lower transport roller 17 horizontally.
  • a pre-bending body 21 Arranged in front of the transport rollers 16 and 17 is a pre-bending body 21 which, in a vertical section according to FIG. 2, has a profile which tapers in a wedge shape in the direction of the roller gap between the transport rollers 16 and 17.
  • the pre-bending body 21 is parallel to the transport rollers 16 and 17 Axis swiveling and infinitely lockable; In addition, the horizontal distance of the pre-bending body 21 from the gap between the transport rollers 16 and 17 is adjustable.
  • a cover plate 22 Connected to the transport rollers 16 and 17 is a cover plate 22, which is also arranged in a stationary manner above the table 20 and is also horizontal. At the end of the cover plate 22 and the table 20, horizontally lying bending rollers 24 and 25 are arranged vertically one above the other. The nip between the bending rollers 24 and 25 is adjustable.
  • the sheet metal blank 10 which gets into the nip between the transport rollers 16 and 17, is pressed down by the pre-bending body 21, so that its front edge abuts against the lower transport roller 17. During the further movement in the direction 12 caused by the transport rollers 16 and 17, the sheet metal blank 10, with the exception of its front edge region, loses the bend imposed on it by the pre-bending body 21; Most of the sheet metal blank 10 is bent downwards and upwards once, which reduces internal stresses. On the way from the transport rollers 16 and 17 to the bending rollers 24 and 25, the sheet metal blank 10 is guided between the table 20 and the cover plate 22. Before the transport rollers 16 and 17 release the rear edge region of the sheet metal blank 10, the front edge region which has remained curved downwards is gripped by the bending rollers 24 and 25.
  • a guide 27 is arranged, which is curved in the shape of an arc around the narrowest point of the gap between the bending rollers 24 and 25 and carries a deflecting body 28 which can be adjusted correspondingly in the shape of an arc.
  • the deflector 28 is arranged so that it The sheet metal blank 10 moving between the bending rollers 24 and 25, the front edge region of which is already bent downwards for the reasons mentioned, bends overall in the same direction as the front edge region, in the example shown downwards, that is to say away from the upper bending roller 24.
  • a catch bar 29 is arranged, which extends over the entire length of the two bending rollers 24, 25 and is designed as a component of a height-adjustable guide rail 30.
  • the guide rail 30 is aligned with a so-called Z-rail 31, which is common in electrical resistance welding machines for welding pinch seams, has a Z-shaped cross-sectional profile and extends to the welding station 15.
  • the sheet metal blank 10 which is bent by the bending rollers 24 and 25, rounds around the guide rail 30 until it abuts with its front edge in the previous direction of movement 12 against the left side of the catch strip 29 in FIGS. 2 and 3, as a result of which the latter Edge between the lower bending roller 25 and the guide rail 30 is caught. As soon as the rear edge of the bent sheet metal blank 10 in the previous direction of movement 12 is released by the bending rollers 24 and 25, it jumps into the space between the lower bending roller 25 and the guide rail 30 and lies on the right side in FIGS Catch strip 29.
  • the space that is required for rounding the sheet metal blank 10 is enclosed by two shells 32 and 33.
  • the shell 32 is arranged on the left in FIGS. 2 and 3, facing the transport rollers 16 and 17, of the catch bar 29 and the guide rail 30 and has a fixed position a C-shaped cross-sectional profile;
  • the shell 33 is arranged on the side of the catch bar 29 and the guide rail 30 facing away from the transport rollers 16 and 17, has an L-shaped cross-sectional profile and is fastened to an adjustable support plate 34.
  • the support plate 34 is supported in a hinge-like manner on a roller-shaped elastomer body 35 and can be pivoted about this elastomer body by means of a piston-cylinder unit 36.
  • the lower part of its cross section of the guide rail 30 is let into an electrode support arm 37 which is fastened to the machine frame 11, extends in the direction of movement 14 to the welding station 15 and also carries the Z-rail 31.
  • the rounded sheet metal blank 10 encloses the electrode support arm 37 at a radial distance, so that it can be moved along the guide rail 30 to the free end of the electrode support arm 37 on the right in FIG. 1 and can be moved away from it there.
  • a plate-shaped transport rail 38 is arranged in a vertical plane, on which a slide 40 can be pushed back and forth in and against the direction of movement 14 by means of ball guides 39.
  • a horizontal journal 41 is fastened to the slide 40 at right angles to the transport rail 38, on which a rocker 42 is mounted so that it can be swiveled up and down between stops 43 and 44.
  • Two curves 45 are formed on the rocker 42, each of which controls a lever 46.
  • the two levers 46 are each attached to one of two shafts 47, which are mounted parallel to each other and to the transport rail 38 on the carriage 40 and each carry a slim, rod-shaped conveying member 48.
  • the conveyor members 48 extend parallel to the transport rail 38 and are each eccentric on the associated one Shaft 47 attached so that their distance from each other can be changed by rotating the shafts 47 by pivoting the levers 46 attached to them. 2, 3 and 9, the two conveying members 48 are shown in a rest position, in which they are arranged radially within the rounded sheet metal blank 10 and move backwards from the rounded sheet metal blank 10 by a backward movement of the carriage 40, counter to the direction of movement 14 let it pull out. In Fig. 10, the conveyor members 48 are shown in a working position in which they push the next forward stroke of the carriage 40 in the direction of movement 14 against the circular edge of the rounded sheet metal blank 10, which is relative to this direction, and push it forward.
  • a vertical support 49 is fastened to the carriage 40, on which a push rod 50 parallel to the conveyor members 48 is clamped in a height-adjustable manner.
  • the push rod 50 is set such that it can be moved past the outside thereof without touching it.
  • a pawl 51 is mounted at the front end of the push rod 50. This is shown in Fig. 6 with full lines in its rest position and with dash-dotted lines in its working position.
  • the pawl 51 In the rest position, the pawl 51 does not touch the rounded sheet metal blank 10 any more than the push rod 50 itself during the backward stroke of the slide 40; during the forward stroke of the slide 40, however, the pawl 51 abuts against the rear edge of the rounded sheet metal blank 10 in order to advance the rounded sheet metal blank 10 from the rounding station 13 into the welding station 15 together with the two conveying members 48.
  • the pawl 51 like the two conveying members 48, is controlled by pivoting the rocker 42.
  • the pawl 51 is connected to the rocker 42 by a rope 52 which, together with a jacket 53, forms a Bowden cable.
  • the jacket 53 is supported on the one hand on an abutment 54 fastened to the slide 40 and on the other hand at the rear end of the push rod 50.
  • the pivoting of the rocker 42 with respect to the carriage 40 required to control the conveying members 48 and the pawl 51 is derived from its reciprocating movements.
  • a brake body 55 is displaceably guided in the carriage 40 towards the transport rail 38 and is biased by a spring 56 in such a way that it constantly acts on the carriage 40 in a braking manner.
  • the driving forces required to move the carriage 40 are derived from a motor 57 and introduced into the rocker 42 via an articulated coupling drive 58 and a crank drive 59 in such a way that they have a torque with respect to the journal 41.
  • the articulated coupling drive 58 includes a drive shaft 60 rotated continuously or intermittently by the motor 57, which is connected by a first crank 61 fastened to it via a coupling member 62 to a second crank 63 which is fastened to an output shaft 64 parallel to the drive shaft 60 at a distance .
  • the articulated coupling drive 58 is adjustable in the example shown in that the length of the coupling member 62 is variable. Instead or in addition, the effective length of the crank 61 and / or the crank 63 can be changed in that the coupling member 62 is articulated on the crank 61 or 63 at a more or less large radial distance from the drive shaft 60 or the output shaft 64.
  • the connecting rod guide 66 is articulated on the crank 65 and contains a spring 68 which is set with an adjusting screw 69 in such a way is biased that it presses a locking pin 70 with a predetermined force into a recess 71 of the connecting rod 67.
  • the locking pin 70 When overloaded, the locking pin 70 is pressed out of the recess 71, so that the connecting rod 67 can move relative to the connecting rod guide 66 within limits, which are determined by the fact that a pin 72 is attached to the connecting rod guide 66, which is in a longitudinal groove 73 of the connecting rod 67 engages.
  • the end of the connecting rod 67 remote from the connecting rod guide 66 is connected to the rocker 42 by a joint 74.
  • the joint 74 is arranged at a distance parallel to the axle journal 41 in such a way that a force transmitted from the connecting rod 67 to the rocker 42 and directed forward in the direction of movement 14 causes the rocker to pivot upward 42 effected according to FIG. 10, whereby the conveyor members 48 and the pawl 51 get into their working position. If, on the other hand, the connecting rod 67 transmits a force opposing the direction of movement 14 to the rocker 42, this is pivoted downward, so that the conveyor members 48 and the pawl 51 assume their rest position according to FIGS. 6 and 9.
  • the welding station 15 is of a conventional type. Its main components are an upper electrode roller 75, which is mounted on a vertically movable, downwardly biased electrode head 76, and a lower electrode roller 77, which is mounted on the front end of the electrode carrier arm 37 on the right in FIG. 1.
  • An electrode wire 78 runs over the electrode rollers 75 and 77, which is removed as a round wire from a storage container (not shown) and runs over deflection rollers 79 and 80 with a wire brake arranged in between and through a rolling device 81.
  • the electrode wire 78 runs over further deflection rollers 82 and 83, loops around the upper electrode roller 75, runs from there further over deflection rollers 84 to 87, wraps around the lower electrode roller 76 and continues from there via deflection rollers 88 to 93 to a take-off device 94 and a chopper 95, from which the electrode wire 78 is chopped into small pieces which are discharged through a channel 96.
  • each sheet blank 10 is pushed by the two conveying members 48 and the pawl 51 through a roller cage 97 and a calibration roller ring 98.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Making Paper Articles (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Replacement Of Web Rolls (AREA)
  • Resistance Welding (AREA)
  • Chutes (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

A sheet blank (10) can be moved through between a first and a second bending roll (24, 25). Arranged behind the bending rolls (24, 25) in the direction (12) of motion of the blank is a deflector (28), at which the sheet blank (10) can be deflected away from the first bending roll (24) out of its original direction (12) of motion and around the second bending roll (25). To intercept the forward edge of the sheet blank (10) in the original direction (12) of motion, an intersecting strip (29) is arranged at that side of the second bending roll (25) which faces away from the first bending roll (24), at least approximately in the common plane of the axes of the two bending rolls (24, 25). The intersecting strip (29) is part of a guide rail (30), along which the rounded sheet blank (10) is guided with the longitudinal edges close together during an axial onward movement. The guide rail (30) extends at least approximately over the entire length of the two bending rolls (24, 25) and is arranged in such a way that the sheet blank (10) surrounds it during the bending of the latter. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Runden und Weiterfördern von Blechzuschnitten, mit

  • einer ersten und einer zweiten Biegewalze, zwischen denen ein Blechzuschnitt hindurchbewegbar ist,
  • einem in Bewegungsrichtung des Blechzuschnittes hinter den Biegewalzen angeordneten Ablenkkörper, an dem der Blechzuschnitt von der ersten Biegewalze weg und um die zweite Biegewalze herum aus seiner ursprünglichen Bewegungsrichtung ablenkbar ist, und
  • einer Führungsschiene zur Führung des gerundeten Blechzuschnitts bei seiner axialen Weiterbewegung, welche Führungsschiene derart in Längsrichtung der beiden Biegewalzen angeordnet ist, dass sie beim Biegen des Blechzuschnitts von diesem umrundet wird, und an welcher eine Fangleiste zum Abfangen des in Bewegungsrichtung vorderen Randes des Blechzuschnitts auf der von der ersten Biegewalze abgewandten Seite der zweiten Biegewalze etwa in der die Achsen beider Walzen enthaltenden Ebene angeordnet ist.
The invention relates to a device for rounding and conveying sheet metal blanks, with
  • a first and a second bending roller, between which a sheet metal blank can be moved,
  • a deflection body arranged behind the bending rollers in the direction of movement of the sheet metal blank, on which the sheet metal blank can be deflected away from its original direction of movement away from the first bending roller and around the second bending roller, and
  • a guide rail for guiding the rounded sheet metal blank during its axial further movement, which guide rail is arranged in the longitudinal direction of the two bending rollers such that it is surrounded by the sheet metal blank when it is bent, and on which a catch bar for catching the front edge of the metal sheet blank in the direction of movement on the from the side of the second bending roller facing away from the first bending roller is arranged approximately in the plane containing the axes of both rollers.

Eine Vorrichtung dieser Art ist aus DE-A-23 19 447 bekannt. Jeweils nach dem Runden eines Blechzuschnitts, sobald dessen hinterer Rand den Walzenspalt verlassen hat, muss der Blechzuschnitt axial weiterbewegt werden, wobei seine beiden an der Führungsschiene geführten Ränder in je eine Nut einer anschliessenden sogenannten Z-Schiene eingeschoben werden. Ueber die Mittel zum axialen Weiterbewegen ist im vorgenannten Dokument nichts Genaueres ausgesagt, jedoch sind bei einer Vorrichtung nach DE-A-33 30 171 zu diesem Zweck zwei Kettenförderer vorgesehen, die unterhalb der Biegewalzen und beidseits ausserhalb des Bereichs des gerundeten Blechzuschnitts angeordnet sind und je mit Mitnehmern von aussen über den Rand des Blechzuschnitts greifen, um ihn axial weiterzuschieben. Solche Kettenförderer mit abstehenden Mitnehmern sind sperrig, und sie müssen auf den jeweiligen Durchmesser der gerundeten Zuschnitte (der in weiten Grenzen variieren kann) eingestellt werden. Weiterhin ist nachteilig, dass die Mitnehmer der Kettenförderer relativ weit von den geführten Rändern entfernt am Blechzuschnitt angreifen, wodurch die Führung beeinträchtigt werden kann.A device of this type is known from DE-A-23 19 447. Each time a sheet metal blank has been rounded, as soon as its rear edge has left the nip, the sheet metal blank must be moved axially, with its two edges guided on the guide rail being inserted into a groove in a subsequent so-called Z-rail. Nothing more is stated in the aforementioned document about the means for moving axially further, however two devices are provided for this purpose in a device according to DE-A-33 30 171, which are arranged below the bending rollers and on both sides outside the area of the rounded sheet metal blank and grasp each with carriers from the outside over the edge of the sheet metal blank in order to push it further axially. Such chain conveyors with protruding drivers are bulky and they have to be adjusted to the respective diameter of the rounded blanks (which can vary within wide limits). Another disadvantage is that the drivers of the chain conveyors engage the sheet metal blank relatively far from the guided edges, as a result of which the guidance can be impaired.

Der Erfindung liegt die Aufgabe zugrunde, bei einer Vorrichtung der eingangs genannten Gattung die Mittel zur axialen Weiterförderung der gerundeten Blechzuschnitte raumsparender und mit geringerem Einrichtungsaufwand zu gestalten.The invention is based on the object of making the means for the axial conveyance of the rounded sheet metal blanks more space-saving and with less installation effort in a device of the type mentioned.

Diese Aufgabe ist erfindungsgemäss dadurch gelöst, dass zum axialen Weiterbewegen des gerundeten Blechzuschnittes zwei stabförmige Förderglieder zu beiden Seiten längs der Führungsschiene, und gemeinsam mit dieser vom Blechzuschnitt umrundbar, angeordnet sind, wobei diese Förderglieder entgegen der Richtung der Weiterbewegung des Blechzuschnitts aus diesem herausziehbar und hinter ihm spreizbar sind, um ihn bei einer anschliessenden Vorwärtsbewegung mitzunehmen.This object is achieved according to the invention in that two rod-shaped conveying members are arranged on both sides along the guide rail and can be surrounded by the sheet metal blank to move the rounded sheet metal blank axially, these conveying members being able to be pulled out of and behind the direction of the further movement of the sheet metal blank are spreadable so that they can be carried along during a subsequent forward movement.

Dadurch wird erreicht, dass die Mittel zur Weiterförderung der Blechzuschnitte im Längenbereich der Biegewalzen praktisch keinen Raum ausserhalb der gerundeten Zuschnitte benötigen. Damit wird auch die Anordnung von Führungsschalen, die den vom gerundeten Zuschnitt eingenommenen Raum umschliessen, nicht mehr beeinträchtigt. Da die stabförmigen Förderglieder nahe bei den geführten Rändern des gerundeten Zuschnitts (in dessen querschnitt gesehen) angreifen, muss deren Position nicht dem jeweiligen Durchmesser angepasst werden. Ausserdem sind die Wirkungslinien der von den Fördergliedern auf den Blechzuschnitt ausgeübten Vorschubkräfte den reibungsbehafteten Führungen der Längsränder benachbart, weshalb der Blechzuschnitt bei seiner axialen Weiterbewegung nur geringen Verkantungsmomenten ausgesetzt ist.It is thereby achieved that the means for further conveying the sheet metal blanks in the length range of the bending rollers require practically no space outside of the rounded blanks. This also means that the arrangement of guide shells which surround the space occupied by the rounded blank is no longer impaired. Since the rod-shaped conveying elements engage close to the guided edges of the rounded blank (seen in its cross section), their position does not have to be adapted to the respective diameter. In addition, the lines of action of the feed forces exerted by the conveying members on the sheet metal blank are adjacent to the frictional guides of the longitudinal edges, which is why the sheet metal blank is only exposed to slight canting moments during its axial movement.

Die erfindungsgemäße Vorrichtung ist vorzugsweise dadurch weitergebildet, daß

  • die beiden Förderglieder an einem in Längsrichtung der Führungsschiene hin- und herbewegbaren Schlitten schwenkbar gelagert sind,
  • an dem Schlitten auch eine Wippe derart gelagert ist, daß hin- und hergehende Bewegungen des Schlittens in Schwenkungen der Wippe umgesetzt werden, und
  • an der Wippe Kurven angeordnet sind, von denen Schwenkungen der Förderglieder zueinander hin und voneinander weg gesteuert sind.
The device according to the invention is preferably further developed in that
  • the two conveying members are pivotably mounted on a slide that can be moved back and forth in the longitudinal direction of the guide rail,
  • a rocker is also mounted on the slide in such a way that reciprocating movements of the slide are converted into swiveling of the rocker, and
  • curves are arranged on the rocker, of which swivels of the conveying members are controlled towards and away from each other.

Dabei ist es ferner vorteilhaft, wenn am Schlitten in einem Abstand von den beiden Fördergliedern und im wesentlichen parallel zu ihnen außerhalb des vom gerundeten Blechzuschnitt umschlossenen Raumes eine Schubstange angeordnet ist, die mit einer an ihr gelagerten Klinke zusätzlich zu den beiden Fördergliedern und gegen diese im Winkel versetzt am hinteren Rand des gerundeten Blechzuschnitts angreift. Auf diese Weise lassen sich die zum axialen Weiterbewegen des gerundeten Blechzuschnitts erforderlichen Vorschubkräfte noch gleichmäßiger verteilen.It is also advantageous if a push rod is arranged on the slide at a distance from the two conveyor members and essentially parallel to them outside the space enclosed by the rounded sheet metal blank, which, in addition to the two conveyor members and against them, with a pawl mounted on it Angle offset attacks at the rear edge of the rounded sheet metal blank. In this way, the feed forces required for axially moving the rounded sheet metal blank can be distributed evenly.

Selbst bei vollständig momentenfreier Übertragung der Vorschubkräfte auf den gerundeten Blechzuschnitt läßt sich die Gefahr nicht völlig ausschließen, daß sich, beispielsweise infolge einer Störung in einer nachgeordneten Schweißvorrichtung, zwei oder mehr hintereinander geförderte Blechzuschnitte stauen. Deshalb ist es zweckmäßig, die Gefahr einer Überlastung der notwendigerweise schlanken erfindungsgemäßen Förderglieder dadurch auszuschließen, daß der Schlitten über einen Kurbeltrieb antreibbar ist, der eine an einer Abtriebswelle befestigte Kurbel und ein Pleuel mit zwei Pleuelteilen aufweist, die teleskopartig verschiebbar aneinander geführt und miteinander durch eine bei Überlast auslösende Rastvorrichtung verbunden sind.Even with completely torque-free transmission of the feed forces to the rounded sheet metal blank, the risk cannot be completely ruled out that two or more sheet metal blanks conveyed in series, for example as a result of a fault in a downstream welding device, may jam. It is therefore expedient to rule out the risk of overloading the necessarily slender conveying members according to the invention in that the carriage can be driven via a crank drive which has a crank attached to an output shaft and a connecting rod with two connecting rod parts which telescopically guided to each other and connected to each other by a latching device which triggers when overloaded.

Die Übergabe des mit der erfindungsgemäßen Vorrichtung axial weiterbewegten Blechzuschnitts an eine nachfolgende Vorrichtung, beispielsweise ein Paar Elektrodenrollen, erfordert eine genaue Abstimmung des Übergabeortes und der Geschwindigkeiten der bewegten Bauteile der bekannten Vorrichtungen. Deshalb ist es, auch unabhängig von den vorstehend beschriebenen Merkmalen, vorteilhaft, wenn die Antriebswelle achsversetzt zu einer Antriebswelle gelagert und mit dieser durch einen Gelenkkoppeltrieb verbunden ist.The transfer of the sheet metal blank, which is moved axially with the device according to the invention, to a subsequent device, for example a pair of electrode rollers, requires a precise coordination of the transfer location and the speeds of the moving components of the known devices. Therefore, regardless of the features described above, it is advantageous if the drive shaft is axially offset from a drive shaft and is connected to it by an articulated coupling drive.

Der Gelenkkoppeltrieb weist vorzugsweise zwei Kurbeln auf, die an der Antriebswelle bwz. an der Abtriebswelle befestigt und durch ein Koppelglied von einstellbarer Länge miteinander verbunden sind. Zum Einstellen des Gelenkkoppeltriebs kann beispielsweise die Länge des Koppelglieds veränderbar sein.The articulated coupling drive preferably has two cranks that bwz on the drive shaft. attached to the output shaft and connected to each other by a coupling member of adjustable length. To adjust the articulated coupling drive, the length of the coupling element can be changeable, for example.

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

Fig. 1
eine Seitenansicht einer Maschine zum elektrischen Widerstands-Quetschnahtschweißen der Längsränder von Dosenzargen,
Fig. 2
eine Schrägansicht einer Baugruppe im Bereich II in Fig. 1,
Fig. 3
einen vergrößerten Schnitt derselben Baugruppe in der senkrechten Ebene III-III in Fig. 1,
Fig. 4
eine Schrägansicht des Bereichs IV in Fig. 1,
Fig. 5
den waagerechten Teilschnitt V-V in Fig. 4,
Fig. 6
die Seitenansicht in Richtung des Pfeils VI in Fig. 4,
Fig. 7
den senkrechten Teilschnitt VII-VII in Fig. 6,
Fig. 8
den waagerechten Teilschnitt VIII-VIII in Fig. 6,
Fig. 9
eine Schrägansicht in Richtung des Pfeils IX in Fig. 4, in einer ersten Betriebsstellung, und
Fig. 10
eine der Fig. 9 entsprechende Schrägansicht in einer zweiten Betriebsstellung.
An embodiment of the invention is explained below with the aid of schematic drawings with further details. Show it:
Fig. 1
1 shows a side view of a machine for electrical resistance squeeze seam welding of the longitudinal edges of can bodies,
Fig. 2
2 shows an oblique view of an assembly in area II in FIG. 1,
Fig. 3
2 shows an enlarged section of the same assembly in the vertical plane III-III in FIG. 1,
Fig. 4
2 shows an oblique view of area IV in FIG. 1,
Fig. 5
the horizontal partial section VV in Fig. 4,
Fig. 6
the side view in the direction of arrow VI in Fig. 4,
Fig. 7
the vertical partial section VII-VII in Fig. 6,
Fig. 8
the horizontal partial section VIII-VIII in Fig. 6,
Fig. 9
an oblique view in the direction of arrow IX in Fig. 4, in a first operating position, and
Fig. 10
an oblique view corresponding to FIG. 9 in a second operating position.

Mit der dargestellten Maschine werden ebene Blechzuschnitte 10 zylindrisch gerundet und an ihren zur Zylinderachse parallelen Rändern verschweißt. Die für diese Arbeitsgänge erforderlichen Vorrichtungen sind an einem gemeinsamen Maschinengestell 11 angeordnet. Die Blechzuschnitte 10 werden gemäß Fig. 2, von einer nicht dargestellten Abstapelvorrichtung kommend, in einer waagerechten Bewegungsrichtung 12 einer Rundestation 13 zugeführt und verlassen diese gerundet in einer ebenfalls waagerechten Bewegungsrichtung 14, die mit der ursprünglichen Bewegungsrichtung 12 einen rechten Winkel einschließt, und werden einer Schweißstation 15 zugeführt.With the machine shown, flat sheet metal blanks 10 are rounded cylindrically and welded at their edges parallel to the cylinder axis. The devices required for these operations are arranged on a common machine frame 11. 2, coming from a stacking device (not shown), is fed to a round station 13 in a horizontal direction of movement 12 and leaves it rounded in a likewise horizontal direction of movement 14, which includes a right angle with the original direction of movement 12, and becomes one Welding station 15 supplied.

Zur Rundestation 13 gehört ein Paar waagerecht liegende, senkrecht übereinander angeordnete Transportwalzen 16 und 17, die gemeinsam antreibbar sind, um jeweils einen Blechzuschnitt 10 in der Bewegungsrichtung 12 durch einen zwischen ihnen gebildeten, einstellbaren Walzenspalt zu fördern. An die untere Transportwalze 17 schließt sich waagerecht ein Tisch 20 an. Vor den Transportwalzen 16 und 17 ist ein Vorbiegekörper 21 angeordnet, der in einem senkrechten Schnitt gemäß Fig. 2 ein Profil aufweist, das sich keilförmig in Richtung zum Walzenspalt zwischen den Transportwalzen 16 und 17 verjüngt. Der Vorbiegekörper 21 ist um eine zu den Transportwalzen 16 und 17 parallele Achse schwenkbar und stufenlos feststellbar; außerdem ist der waagerechte Abstand des Vorbiegekörpers 21 vom Spalt zwischen den Transportwalzen 16 und 17 einstellbar.The round station 13 includes a pair of horizontally lying, vertically superposed transport rollers 16 and 17, which can be driven together to convey a sheet metal blank 10 in the direction of movement 12 through an adjustable roller gap formed between them. A table 20 adjoins the lower transport roller 17 horizontally. Arranged in front of the transport rollers 16 and 17 is a pre-bending body 21 which, in a vertical section according to FIG. 2, has a profile which tapers in a wedge shape in the direction of the roller gap between the transport rollers 16 and 17. The pre-bending body 21 is parallel to the transport rollers 16 and 17 Axis swiveling and infinitely lockable; In addition, the horizontal distance of the pre-bending body 21 from the gap between the transport rollers 16 and 17 is adjustable.

An die Transportwalzen 16 und 17 schließt sich eine oberhalb des Tisches 20 ortsfest angeordnete, ebenfalls waagerechte Deckplatte 22 an. Am Ende der Deckplatte 22 und des Tisches 20 sind waagerecht liegende Biegewalzen 24 und 25 senkrecht übereinander angeordnet. Der Walzenspalt zwischen den Biegewalzen 24 und 25 ist einstellbar.Connected to the transport rollers 16 and 17 is a cover plate 22, which is also arranged in a stationary manner above the table 20 and is also horizontal. At the end of the cover plate 22 and the table 20, horizontally lying bending rollers 24 and 25 are arranged vertically one above the other. The nip between the bending rollers 24 and 25 is adjustable.

Der Blechzuschnitt 10, der in den Walzenspalt zwischen den Transportwalzen 16 und 17 gelangt, wird vom Vorbiegekörper 21 nach unten gedrückt, so daß er mit seinem vorderen Rand gegen die untere Transportwalze 17 stößt. Bei der weiteren, von den Transportwalzen 16 und 17 hervorgerufenen Bewegung in der Richtung 12 verliert der Blechzuschnitt 10 mit Ausnahme seines vorderen Randbereichs durch die Einwirkung des Tisches 20 seine ihm vom Vorbiegekörper 21 aufgezwungene Biegung wieder; der größte Teil des Blechzuschnitts 10 wird also je einmal abwärts und wieder aufwärts gebogen, wodurch innere Spannungen abgebaut werden. Auf dem Weg von den Transportwalzen 16 und 17 zu den Biegewalzen 24 und 25 ist der Blechzuschnitt 10 zwischen Tisch 20 und Deckplatte 22 geführt. Ehe die Transportwalzen 16 und 17 den hinteren Randbereich des Blechzuschnitts 10 freigeben, wird dessen nach unten gekrümmt gebliebener vorderer Randbereich von den Biegewalzen 24 und 25 erfaßt.The sheet metal blank 10, which gets into the nip between the transport rollers 16 and 17, is pressed down by the pre-bending body 21, so that its front edge abuts against the lower transport roller 17. During the further movement in the direction 12 caused by the transport rollers 16 and 17, the sheet metal blank 10, with the exception of its front edge region, loses the bend imposed on it by the pre-bending body 21; Most of the sheet metal blank 10 is bent downwards and upwards once, which reduces internal stresses. On the way from the transport rollers 16 and 17 to the bending rollers 24 and 25, the sheet metal blank 10 is guided between the table 20 and the cover plate 22. Before the transport rollers 16 and 17 release the rear edge region of the sheet metal blank 10, the front edge region which has remained curved downwards is gripped by the bending rollers 24 and 25.

Hinter den Biegewalzen 24 und 25 ist eine Führung 27 angeordnet, die um die engste Stelle des Spalts zwischen den Biegewalzen 24 und 25 herum bogenförmig gekrümmt ist und einen entsprechend bogenförmig einstellbaren Ablenkkörper 28 trägt. Der Ablenkkörper 28 ist so angeordnet, daß er den sich zwischen den Biegewalzen 24 und 25 hindurchbewegenden Blechzuschnitt 10, dessen vorderer Randbereich aus den genannten Gründen schon nach unten gebogen ist, insgesamt in der gleichen Richtung wie den vorderen Randbereich, im dargestellten Beispiel abwärts, also von der oberen Biegewalze 24 weg, biegt.Behind the bending rollers 24 and 25, a guide 27 is arranged, which is curved in the shape of an arc around the narrowest point of the gap between the bending rollers 24 and 25 and carries a deflecting body 28 which can be adjusted correspondingly in the shape of an arc. The deflector 28 is arranged so that it The sheet metal blank 10 moving between the bending rollers 24 and 25, the front edge region of which is already bent downwards for the reasons mentioned, bends overall in the same direction as the front edge region, in the example shown downwards, that is to say away from the upper bending roller 24.

Unmittelbar unterhalb der unteren Biegwalze 25, diese nahezu berührend, ist eine Fangleiste 29 angeordnet, die sich über die gesamte Länge der beiden Biegewalzen 24, 25 erstreckt und als Bestandteile einer höheneinstellbaren Führungsschiene 30 ausgebildet ist. Die Führungsschiene 30 fluchtet mit einer sogenannten Z-Schiene 31, die bei elektrischen Widerstands-Schweißmaschinen zum Schweißen von Quetschnähten üblich ist, ein Z-förmiges Querschnittsprofil hat und sich bis zur Schweißstation 15 erstreckt.Immediately below the lower bending roller 25, almost touching it, a catch bar 29 is arranged, which extends over the entire length of the two bending rollers 24, 25 and is designed as a component of a height-adjustable guide rail 30. The guide rail 30 is aligned with a so-called Z-rail 31, which is common in electrical resistance welding machines for welding pinch seams, has a Z-shaped cross-sectional profile and extends to the welding station 15.

Der Blechzuschnitt 10, der von den Biegewalzen 24 und 25 gebogen wird, rundet sich um die Führungsschiene 30 herum, bis er mit seinem in der bisherigen Bewegungsrichtung 12 vorderen Rand gegen die in Fig. 2 und 3 linke Seite der Fangleiste 29 stößt, wodurch dieser Rand zwischen der unteren Biegewalze 25 und der Führungsschiene 30 gefangen ist. Sobald der in der bisherigen Bewegungsrichtung 12 hintere Rand des gebogenen Blechzuschnitts 10 von den Biegewalzen 24 und 25 freigegeben wird, springt er in den Zwischenraum zwischen der unteren Biegewalze 25 und der Führungsschiene 30 und legt sich an die in Fig. 2 und 3 rechte Seite der Fangleiste 29 an.The sheet metal blank 10, which is bent by the bending rollers 24 and 25, rounds around the guide rail 30 until it abuts with its front edge in the previous direction of movement 12 against the left side of the catch strip 29 in FIGS. 2 and 3, as a result of which the latter Edge between the lower bending roller 25 and the guide rail 30 is caught. As soon as the rear edge of the bent sheet metal blank 10 in the previous direction of movement 12 is released by the bending rollers 24 and 25, it jumps into the space between the lower bending roller 25 and the guide rail 30 and lies on the right side in FIGS Catch strip 29.

Der Raum, der für das Runden des Blechzuschnitts 10 beansprucht wird, ist von zwei Schalen 32 und 33 umschlossen. Die Schale 32 ist auf der in Fig. 2 und 3 linken, den Transportwalzen 16 und 17 zugewandten Seite der Fangleiste 29 und der Führungsschiene 30 ortsfest angeordnet und hat ein C-förmiges Querschnittsprofil; die Schale 33 ist auf der von den Transportwalzen 16 und 17 abgewandten Seite der Fangleiste 29 und der Führungsschiene 30 angeordnet, hat ein L-förmiges Querschnittsprofil und ist an einer verstellbaren Tragplatte 34 befestigt. Die Tragplatte 34 stützt sich scharnierartig an einem walzenförmigen Elastomerkörper 35 ab und ist mittels einer Kolbenzylindereinheit 36 um diesen Elastomerkörper schwenkbar.The space that is required for rounding the sheet metal blank 10 is enclosed by two shells 32 and 33. The shell 32 is arranged on the left in FIGS. 2 and 3, facing the transport rollers 16 and 17, of the catch bar 29 and the guide rail 30 and has a fixed position a C-shaped cross-sectional profile; the shell 33 is arranged on the side of the catch bar 29 and the guide rail 30 facing away from the transport rollers 16 and 17, has an L-shaped cross-sectional profile and is fastened to an adjustable support plate 34. The support plate 34 is supported in a hinge-like manner on a roller-shaped elastomer body 35 and can be pivoted about this elastomer body by means of a piston-cylinder unit 36.

Die Führungsschiene 30 ist mit dem unteren Teil ihres Querschnitts in einen Elektrodenträgerarm 37 eingelassen, der am Maschinengestell 11 befestigt ist, sich in der Bewegungsrichtung 14 zur Schweißstation 15 erstreckt und auch die Z-Schiene 31 trägt. Der gerundete Blechzuschnitt 10 umschließt den Elektrodenträgerarm 37 mit radialem Abstand, so daß er längs der Führungsschiene 30 bis zum freien, in Fig. 1 rechten Ende des Elektrodenträgerarms 37 verschiebbar und dort von ihm wegbewegbar ist.The lower part of its cross section of the guide rail 30 is let into an electrode support arm 37 which is fastened to the machine frame 11, extends in the direction of movement 14 to the welding station 15 and also carries the Z-rail 31. The rounded sheet metal blank 10 encloses the electrode support arm 37 at a radial distance, so that it can be moved along the guide rail 30 to the free end of the electrode support arm 37 on the right in FIG. 1 and can be moved away from it there.

Parallel zum Elektrodenträgerarm 37 ist in einer senkrechten Ebene eine plattenförmige Transportschiene 38 angeordnet, auf der mittels Kugelführungen 39 ein Schlitten 40 in und entgegen der Bewegungsrichtung 14 hin- und herschiebbar ist. Am Schlitten 40 ist im rechten Winkel zur Transportschiene 38 ein waagerechter Achszapfen 41 befestigt, auf dem eine Wippe 42 zwischen Anschlägen 43 und 44 auf-und abschwenkbar gelagert ist. An der Wippe 42 sind zwei Kurven 45 ausgebildet, die je einen Hebel 46 steuern. Die beiden Hebel 46 sind an je einer von zwei Wellen 47 befestigt, die parallel zueinander und zur Transportschiene 38 am Schlitten 40 gelagert sind und je ein schlankes, stangenförmiges Förderglied 48 tragen.Parallel to the electrode support arm 37, a plate-shaped transport rail 38 is arranged in a vertical plane, on which a slide 40 can be pushed back and forth in and against the direction of movement 14 by means of ball guides 39. A horizontal journal 41 is fastened to the slide 40 at right angles to the transport rail 38, on which a rocker 42 is mounted so that it can be swiveled up and down between stops 43 and 44. Two curves 45 are formed on the rocker 42, each of which controls a lever 46. The two levers 46 are each attached to one of two shafts 47, which are mounted parallel to each other and to the transport rail 38 on the carriage 40 and each carry a slim, rod-shaped conveying member 48.

Die Förderglieder 48 erstrecken sich parallel zur Transportschiene 38 und sind jeweils exzentrisch an der zugehörigen Welle 47 befestigt, so daß ihr Abstand voneinander dadurch veränderbar ist, daß die Wellen 47 durch Schwenken der an ihnen befestigten Hebel 46 gedreht werden. In Fig. 2, 3 und 9 sind die beiden Förderglieder 48 in einer Ruhestellung abgebildet, in der sie radial innerhalb des gerundeten Blechzuschnitts 10 angeordnet sind und sich durch eine Rückwärtsbewegung des Schlittens 40, entgegen der Bewegungsrichtung 14, aus dem gerundeten Blechzuschnitt 10 nach hinten herausziehen lassen. In Fig. 10 sind die Förderglieder 48 in einer Arbeitsstellung abgebildet, in der sie beim nächsten Vorwärtshub des Schlittens 40 in der Bewegungsrichtung 14 gegen den bezogen auf diese Richtung hinteren kreisförmigen Rand des gerundeten Blechzuschnitts 10 stoßen und diesen vorwärtsschieben.The conveyor members 48 extend parallel to the transport rail 38 and are each eccentric on the associated one Shaft 47 attached so that their distance from each other can be changed by rotating the shafts 47 by pivoting the levers 46 attached to them. 2, 3 and 9, the two conveying members 48 are shown in a rest position, in which they are arranged radially within the rounded sheet metal blank 10 and move backwards from the rounded sheet metal blank 10 by a backward movement of the carriage 40, counter to the direction of movement 14 let it pull out. In Fig. 10, the conveyor members 48 are shown in a working position in which they push the next forward stroke of the carriage 40 in the direction of movement 14 against the circular edge of the rounded sheet metal blank 10, which is relative to this direction, and push it forward.

Am Schlitten 40 ist eine senkrechte Stütze 49 befestigt, an der eine zu den Fördergliedern 48 parallele Schubstange 50 höheneinstellbar festgeklemmt ist. Die Schubstange 50 ist bei gegebenem Durchmesser des gerundeten Blechzuschnitts 10 so eingestellt, daß sie an dessen Außenseite vorbeibewegbar ist, ohne ihn zu berühren. Am vorderen Ende der Schubstange 50 ist eine Klinke 51 gelagert. Diese ist in Fig. 6 mit vollen Linien in ihrer Ruhestellung und mit strichpunktierten Linien in ihrer Arbeitsstellung abgebildet. In der Ruhestellung berührt die Klinke 51 beim Rückwärtshub des Schlittens 40 den gerundeten Blechzuschnitt 10 ebensowenig wie die Schubstange 50 selbst; beim Vorwärtshub des Schlittens 40 stößt die Klinke 51 jedoch gegen den hinteren Rand des gerundeten Blechzuschnitts 10, um gemeinsam mit den beiden Fördergliedern 48 den gerundeten Blechzuschnitt 10 aus der Rundestation 13 in die Schweißstation 15 vorzuschieben.A vertical support 49 is fastened to the carriage 40, on which a push rod 50 parallel to the conveyor members 48 is clamped in a height-adjustable manner. For a given diameter of the rounded sheet metal blank 10, the push rod 50 is set such that it can be moved past the outside thereof without touching it. A pawl 51 is mounted at the front end of the push rod 50. This is shown in Fig. 6 with full lines in its rest position and with dash-dotted lines in its working position. In the rest position, the pawl 51 does not touch the rounded sheet metal blank 10 any more than the push rod 50 itself during the backward stroke of the slide 40; during the forward stroke of the slide 40, however, the pawl 51 abuts against the rear edge of the rounded sheet metal blank 10 in order to advance the rounded sheet metal blank 10 from the rounding station 13 into the welding station 15 together with the two conveying members 48.

Ebenso wie die Förderglieder 48 und die Schubstange 50 mit Klinke 51 in deren Ruhestellung sind alle anderen mit dem Schlitten 40 hin- und herbewegbaren Teile so angeordnet, daß sie beim Rückwärtshub 40 das Runden des in der Bearbeitungsfolge nächsten Blechzuschnitts 10 nicht behindern. Dieser nächste Blechzuschnitt 10 kann somit schon während der Rückwärtsbewegung des Schlittens 40 um die beiden Förderglieder 48 herum gerundet werden, wobei die Schubstange 50 außerhalb des entstehenden Rundkörpers bleibt. Sobald dieser vollständig gerundet ist, haben die vorderen, in Fig. 4 und 6 rechten Enden der Förderglieder 48 sowie der Klinke 51 eine Stellung hinter dem hinteren Rand dieses neu gerundeten Blechzuschnitts erreicht, so daß die Bewegungsrichtung des Schlittens 40 umgekehrt und der neue Blechzuschnitt ohne Zeitverlust dem vorangegangenen Blechzuschnitt folgend in die Schweißstation 15 vorgeschoben werden kann.Just like the conveyor members 48 and the push rod 50 with pawl 51 in their rest position, all others are with the Carriage 40 reciprocating parts arranged so that they do not hinder the rounding of the next sheet metal blank 10 in the machining sequence during the reverse stroke 40. This next sheet metal blank 10 can thus already be rounded around the two conveying members 48 during the backward movement of the slide 40, the push rod 50 remaining outside the round body which is created. As soon as this is completely rounded, the front ends of the conveying members 48 and the pawl 51 in FIGS. 4 and 6 have reached a position behind the rear edge of this newly rounded sheet metal blank, so that the direction of movement of the carriage 40 is reversed and the new sheet metal blank is without Loss of time following the previous sheet metal blank can be advanced into the welding station 15.

Die Klinke 51 wird ebenso wie die beiden Förderglieder 48 durch Schwenkungen der Wippe 42 gesteuert. Hierzu ist die Klinke 51 mit der Wippe 42 durch ein Seil 52 verbunden, das zusammen mit einem Mantel 53 einen Bowdenzug bildet. Der Mantel 53 ist einerseits an einem am Schlitten 40 befestigten Widerlager 54 abgestützt und andererseits am hinteren Ende der Schubstange 50.The pawl 51, like the two conveying members 48, is controlled by pivoting the rocker 42. For this purpose, the pawl 51 is connected to the rocker 42 by a rope 52 which, together with a jacket 53, forms a Bowden cable. The jacket 53 is supported on the one hand on an abutment 54 fastened to the slide 40 and on the other hand at the rear end of the push rod 50.

Die zum Steuern der Förderglieder 48 und der Klinke 51 erforderlichen Schwenkungen der Wippe 42 in bezug auf den Schlitten 40 werden von dessen hin- und hergehenden Bewegungen abgeleitet. Zu diesem Zweck ist im Schlitten 40 ein Bremskörper 55 zur Transportschiene 38 hin verschiebbar geführt und durch eine Feder 56 derart vorgespannt, daß er ständig bremsend auf den Schlitten 40 einwirkt. Die zum Bewegen des Schlittens 40 erforderlichen Antriebskräfte werden von einem Motor 57 abgeleitet und über einen Gelenkkoppeltrieb 58 sowie einen Kurbeltrieb 59 in die Wippe 42 derart eingeleitet, daß sie ein Drehmoment in bezug auf den Achszapfen 41 haben.The pivoting of the rocker 42 with respect to the carriage 40 required to control the conveying members 48 and the pawl 51 is derived from its reciprocating movements. For this purpose, a brake body 55 is displaceably guided in the carriage 40 towards the transport rail 38 and is biased by a spring 56 in such a way that it constantly acts on the carriage 40 in a braking manner. The driving forces required to move the carriage 40 are derived from a motor 57 and introduced into the rocker 42 via an articulated coupling drive 58 and a crank drive 59 in such a way that they have a torque with respect to the journal 41.

Zum Gelenkkoppeltrieb 58 gehört eine vom Motor 57 ständig oder intermittierend gedrehte Antriebswelle 60, die durch eine an ihr befestigte erste Kurbel 61 über ein Koppelglied 62 mit einer zweiten Kurbel 63 verbunden ist, welche an einer zur Antriebswelle 60 in einem Abstand parallelen Abtriebswelle 64 befestigt ist. Der Gelenkkoppeltrieb 58 ist im dargestellten Beispiel dadurch einstellbar, daß die Länge des Koppelgliedes 62 veränderbar ist. Stattdessen oder zusätzlich kann die wirksame Länge der Kurbel 61 und/oder der Kurbel 63 veränderbar sein, indem das Koppelglied 62 in einem mehr oder weniger großen radialen Abstand von der Antriebswelle 60 bzw. der Abtriebswelle 64 an der Kurbel 61 bzw. 63 angelenkt wird.The articulated coupling drive 58 includes a drive shaft 60 rotated continuously or intermittently by the motor 57, which is connected by a first crank 61 fastened to it via a coupling member 62 to a second crank 63 which is fastened to an output shaft 64 parallel to the drive shaft 60 at a distance . The articulated coupling drive 58 is adjustable in the example shown in that the length of the coupling member 62 is variable. Instead or in addition, the effective length of the crank 61 and / or the crank 63 can be changed in that the coupling member 62 is articulated on the crank 61 or 63 at a more or less large radial distance from the drive shaft 60 or the output shaft 64.

Die Abtriebswelle 64 bildet zusammen mit einer an ihr befestigten weiteren Kurbel 65, einer Pleuelführung 66 und einer teleskopartig in dieser verschiebbaren Pleuelstange 67 den Kurbeltrieb 59. Die Pleuelführung 66 ist an der Kurbel 65 angelenkt und enthält eine Feder 68, die mit einer Einstellschraube 69 derart vorgespannt ist, daß sie einen Rastbolzen 70 mit einer vorbestimmten Kraft in eine Vertiefung 71 der Pleuelstange 67 drückt. Bei Überlastung wird der Rastbolzen 70 aus der Vertiefung 71 herausgedrückt, so daß die Pleuelstange 67 sich gegenüber der Pleuelführung 66 in Grenzen verschieben kann, die dadurch festgelegt sind, daß an der Pleuelführung 66 ein Zapfen 72 befestigt ist, der in eine Längsnut 73 der Pleuelstange 67 eingreift.The output shaft 64 together with a further crank 65 fastened to it, a connecting rod guide 66 and a connecting rod 67 which can be displaced telescopically in this connecting rod 67 form the crank drive 59. The connecting rod guide 66 is articulated on the crank 65 and contains a spring 68 which is set with an adjusting screw 69 in such a way is biased that it presses a locking pin 70 with a predetermined force into a recess 71 of the connecting rod 67. When overloaded, the locking pin 70 is pressed out of the recess 71, so that the connecting rod 67 can move relative to the connecting rod guide 66 within limits, which are determined by the fact that a pin 72 is attached to the connecting rod guide 66, which is in a longitudinal groove 73 of the connecting rod 67 engages.

Das von der Pleuelführung 66 entfernte Ende der Pleuelstange 67 ist durch ein Gelenk 74 mit der Wippe 42 verbunden. Das Gelenk 74 ist in einem Abstand parallel zum Achszapfen 41 derart angeordnet, daß eine von der Pleuelstange 67 auf die Wippe 42 übertragene, in Bewegungsrichtung 14 vorwärtsgerichtete Kraft eine Aufwärtsschwenkung der Wippe 42 gemäß Fig. 10 bewirkt, wodurch die Förderglieder 48 und die Klinke 51 in ihre Arbeitsstellung gelangen. Überträgt die Pleuelstange 67 hingegen eine der Bewegungsrichtung 14 entgegengerichtete Kraft auf die Wippe 42, so wird diese abwärtsgeschwenkt, so daß die Förderglieder 48 und die Klinke 51 ihre Ruhestellung gemäß Fig. 6 und 9 einnehmen.The end of the connecting rod 67 remote from the connecting rod guide 66 is connected to the rocker 42 by a joint 74. The joint 74 is arranged at a distance parallel to the axle journal 41 in such a way that a force transmitted from the connecting rod 67 to the rocker 42 and directed forward in the direction of movement 14 causes the rocker to pivot upward 42 effected according to FIG. 10, whereby the conveyor members 48 and the pawl 51 get into their working position. If, on the other hand, the connecting rod 67 transmits a force opposing the direction of movement 14 to the rocker 42, this is pivoted downward, so that the conveyor members 48 and the pawl 51 assume their rest position according to FIGS. 6 and 9.

Die Schweißstation 15 ist von üblicher Bauart. Ihre Hauptbestandteile sind eine obere Elektrodenrolle 75, die an einem senkrecht bewegbaren, nach unten vorgespannten Elektrodenkopf 76 gelagert ist, und eine untere Elektrodenrolle 77, die am vorderen, in Fig. 1 rechten Ende des Elektrodenträgerarms 37 gelagert ist. Über die Elektrodenrollen 75 und 77 läuft ein Elektrodendraht 78, der als Runddraht einem nicht dargestellten Vorratsbehälter entnommen wird und über Umlenkrollen 79 und 80 mit einer dazwischen angeordneten Drahtbremse sowie durch eine Walzvorrichtung 81 läuft. Von der Walzvorrichtung 81, in der er ein flaches Profil erhält, läuft der Elektrodendraht 78 über weitere Umlenkrollen 82 und 83, umschlingt die obere Elektrodenrolle 75, läuft von dort weiter über Umlenkrollen 84 bis 87, umschlingt die untere Elektrodenrolle 76 und läuft von dort weiter über Umlenkrollen 88 bis 93 zu einer Abzugvorrichtung 94 und einem Zerhacker 95, von dem der Elektrodendraht 78 in kleine Stücke zerhackt wird, die durch eine Rinne 96 abgeführt werden.The welding station 15 is of a conventional type. Its main components are an upper electrode roller 75, which is mounted on a vertically movable, downwardly biased electrode head 76, and a lower electrode roller 77, which is mounted on the front end of the electrode carrier arm 37 on the right in FIG. 1. An electrode wire 78 runs over the electrode rollers 75 and 77, which is removed as a round wire from a storage container (not shown) and runs over deflection rollers 79 and 80 with a wire brake arranged in between and through a rolling device 81. From the rolling device 81, in which it receives a flat profile, the electrode wire 78 runs over further deflection rollers 82 and 83, loops around the upper electrode roller 75, runs from there further over deflection rollers 84 to 87, wraps around the lower electrode roller 76 and continues from there via deflection rollers 88 to 93 to a take-off device 94 and a chopper 95, from which the electrode wire 78 is chopped into small pieces which are discharged through a channel 96.

Auf dem kurzen Weg zwischen der Rundestation 13 und der Schweißstation 15 wird jeder Blechzuschnitt 10 von den beiden Fördergliedern 48 und der Klinke 51 durch einen Rollenkäfig 97 und einen Kalibrierrollenkranz 98 hindurchgeschoben.On the short path between the round station 13 and the welding station 15, each sheet blank 10 is pushed by the two conveying members 48 and the pawl 51 through a roller cage 97 and a calibration roller ring 98.

Claims (6)

  1. Apparatus for rounding and conveying onwards sheet-metal blanks (10), having
    - a first and a second bending roll (24, 25) between which a sheet-metal blank (10) can be moved through,
    - a deflecting member (28) which is disposed behind the bending rolls (24, 25) in the direction of movement (12) of the sheet-metal blank (10) and at which the sheet-metal blank (10) can be deflected away from the first bending roll (24) and around the second bending roll (25) out of its original direction of movement (12), and
    - a guide rail (30) for guiding the rounded sheet-metal blank (10) during its axial onward movement, said guide rail (30) being arranged in the longitudinal direction of the two bending rolls (24, 25) so that it is rounded by the sheet-metal blank as the latter is being bent, and a catch ridge (29) to catch the edge of the sheet-metal blank (10) that is leading in the direction of movement being arranged on said guide rail on the side of the second bending roll (25) remote from the first bending roll (24) and substantially in the common plane of the axes of the two bending rolls,
    characterised in that for the axial onward movement of the rounded sheet-metal blank (10), two bar-shaped conveying members (48) are disposed to both sides along the guide rail (30) and are adapted to be rounded in common with said guide rail by the sheet-metal blank, said conveying members (48) being withdrawable from the sheet-metal blank (10) in the opposite direction to that of the onward movement of the sheet-metal blank (10) and expandable behind the latter, so as to entrain said blank with them in a subsequent forward movement.
  2. Apparatus according to claim 1,
    characterised in that
    - the two conveying members (48) are pivotably mounted on a carriage (40) adapted to move back and forth in the longitudinal direction of the guide rail (30),
    - also mounted on the carriage (40) is a rocker (42), in such a way that reciprocating movements of the carriage (40) are converted into pivotal movements of the rocker (42),
    and
    - cams (45) are disposed on the rocker (42) and control pivotal movements of the conveying members (48) towards one another and away from one another.
  3. Apparatus according to claim 2,
    characterised in that arranged on the carriage (40), at a distance from the two conveying members (48) and substantially parallel to them outside the space enclosed by the rounded sheet-metal blank (10), is a push rod (50) which by means of a catch (51) mounted on it, and in addition to the two conveying members (48) and offset at an angle thereto, engages the rear edge of the rounded sheet-metal blank (10).
  4. Apparatus according to claim 2 or 3,
    characterised in that the carriage (40) can be driven by a crank drive which incorporates a crank (65) secured to an output shaft (64) and a connecting rod with two connecting-rod parts (66, 67) telescopically displaceable against one another and joined to one another by a locking mechanism (68-71) which is triggered in the event of an overload.
  5. Apparatus according to claim 4,
    characterised in that the output shaft (64) is mounted axially offset to an input shaft (60) and linked thereto by an articulated coupling drive (58).
  6. Apparatus according to claim 5,
    characterised in that the articulated coupling drive (58) incorporates two cranks (61, 63) which are secured to the input shaft (60) and output shaft (64), respectively, and are linked to one another by a coupling member (62) of adjustable length.
EP90113603A 1989-08-22 1990-07-16 Device for rounding and conveying on sheet blanks for can shells Expired - Lifetime EP0413955B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90113603T ATE88388T1 (en) 1989-08-22 1990-07-16 DEVICE FOR ROUNDING AND CONVEYING SHEET METAL BLANKS FOR CAN FRAMES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3044/89 1989-08-22
CH3044/89A CH680714A5 (en) 1989-08-22 1989-08-22

Publications (3)

Publication Number Publication Date
EP0413955A2 EP0413955A2 (en) 1991-02-27
EP0413955A3 EP0413955A3 (en) 1991-04-10
EP0413955B1 true EP0413955B1 (en) 1993-04-21

Family

ID=4247358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113603A Expired - Lifetime EP0413955B1 (en) 1989-08-22 1990-07-16 Device for rounding and conveying on sheet blanks for can shells

Country Status (14)

Country Link
US (1) US5120177A (en)
EP (1) EP0413955B1 (en)
JP (1) JPH0734938B2 (en)
KR (1) KR930007072B1 (en)
CN (1) CN1020684C (en)
AT (1) ATE88388T1 (en)
BR (1) BR9004127A (en)
CH (1) CH680714A5 (en)
CZ (1) CZ282348B6 (en)
DE (4) DE3928959C1 (en)
DK (1) DK169658B1 (en)
ES (1) ES2041084T3 (en)
FI (1) FI904097A0 (en)
SU (1) SU1831397A3 (en)

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* Cited by examiner, † Cited by third party
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CH680714A5 (en) * 1989-08-22 1992-10-30 Elpatronic Ag
CH686665A5 (en) * 1992-08-26 1996-05-31 Maegerle Karl Lizenz A process for preparing Rohrkoerper for packaging tubes.
EP0696486B1 (en) * 1994-08-10 2002-05-22 Elpatronic Ag Method and device for bending sheet metal blanks
US8561445B2 (en) * 2008-10-21 2013-10-22 Smi & Hydraulics, Inc. Rounding system and method used in the manufacture of wind towers
CH700092A2 (en) * 2008-12-09 2010-06-15 Soudronic Ag Vorrund element to a rounding apparatus.
CN102259140B (en) * 2011-07-05 2013-04-17 日照光慧机械设备有限公司 Full-automatic external solar energy barrel processing machine
CN102626819A (en) * 2012-04-05 2012-08-08 汕头市新青罐机有限公司 Rounding device of resistance welding tank body welding machine
JP7027122B2 (en) * 2017-10-27 2022-03-01 シロキ工業株式会社 How to seam weld vehicle door sashes
CN107914415B (en) * 2017-12-08 2023-08-04 汕头市虹桥包装实业有限公司 Sheet-like conveying object storage device capable of conveying stably
CN108555078A (en) * 2018-04-09 2018-09-21 汕头市信力制罐设备有限公司 A kind of tinplate is at circle method and device
CN108746264B (en) * 2018-05-18 2019-07-23 张玉芙 Fully-automatic packaging steel band wears button bending cutting all-in-one machine and wears button bending method
GB201815121D0 (en) 2018-09-17 2018-10-31 Crown Packaging Technology Inc Welding of can bodies
CN109127925A (en) * 2018-10-26 2019-01-04 河北科技大学 Convey roller shaft head automatic stamping equipment
CN113843628B (en) * 2021-10-28 2023-03-28 武昌工学院 Integrated process system and process for robot-based cartridge filter manufacturing
CN117380855B (en) * 2023-12-11 2024-02-20 常州菲莫斯桶业有限公司 Metal barrel production device and production process

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US3001637A (en) * 1958-12-17 1961-09-26 American Can Co Conveyor mechanisms
CH519371A (en) * 1970-02-10 1972-02-29 Opprecht Paul Automatic prodn of welded cans
JPS4817235U (en) * 1971-07-02 1973-02-27
CH553012A (en) * 1972-06-05 1974-08-30 Opprecht Paul DEVICE FOR ROUNDING BEAMS.
US3934324A (en) * 1975-02-14 1976-01-27 Grotnes Machine Works, Inc. Method and apparatus for forming automotive wheel rim blanks
DE2532976B2 (en) * 1975-03-19 1978-03-23 Opprecht, Paul, Bergdietikon, Aargau (Schweiz) Device for the semi or fully automatic electrical resistance longitudinal seam welding of can bodies
CH621499A5 (en) * 1977-06-10 1981-02-13 Paul Opprecht
IT8249012A0 (en) * 1982-08-20 1982-08-20 Fmi Mecfond Aziende Mecc ELECTRIC RESISTANCE WELDING MACHINE FOR BOX BODIES WITH IMPROVED MEANS FOR CALENDERING THE METAL CLAMP AND TRANSPORT OF THE CALENDERED BODIES TO THE WELDING STATION
CH682906A5 (en) * 1984-09-25 1993-12-15 Elpatronic Ag Openable can member and method and apparatus for its production.
CH669130A5 (en) * 1985-06-11 1989-02-28 Elpatronic Ag METHOD AND DEVICE FOR ROUNDING SHEETS, ESPECIALLY FOR CAN BODIES.
CH667831A5 (en) * 1985-08-21 1988-11-15 Elpatronic Ag MACHINE FOR WELDING LONGITUDINAL ROUNDED CANARIES.
CH670212A5 (en) * 1986-05-28 1989-05-31 Elpatronic Ag
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CH671945A5 (en) * 1987-05-07 1989-10-13 Elpatronic Ag
CH680714A5 (en) * 1989-08-22 1992-10-30 Elpatronic Ag

Also Published As

Publication number Publication date
CZ282348B6 (en) 1997-07-16
JPH0394919A (en) 1991-04-19
FI904097A0 (en) 1990-08-20
ES2041084T3 (en) 1993-11-01
DE4023157A1 (en) 1991-02-28
KR910004267A (en) 1991-03-28
US5120177A (en) 1992-06-09
CN1020684C (en) 1993-05-19
EP0413955A3 (en) 1991-04-10
DE4023157C2 (en) 1992-07-16
DK192190D0 (en) 1990-08-13
CN1051875A (en) 1991-06-05
DK192190A (en) 1991-02-23
DE3928940C2 (en) 1992-07-16
KR930007072B1 (en) 1993-07-29
DK169658B1 (en) 1995-01-09
CS9003865A2 (en) 1991-10-15
DE3928940A1 (en) 1991-02-28
ATE88388T1 (en) 1993-05-15
DE3928959C1 (en) 1990-08-09
CH680714A5 (en) 1992-10-30
SU1831397A3 (en) 1993-07-30
BR9004127A (en) 1991-09-03
DE59001240D1 (en) 1993-05-27
JPH0734938B2 (en) 1995-04-19
EP0413955A2 (en) 1991-02-27

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