EP2433720B1 - Four-roll bending machine and method for bending, round bending and rolling sheet - Google Patents
Four-roll bending machine and method for bending, round bending and rolling sheet Download PDFInfo
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- EP2433720B1 EP2433720B1 EP11181544.5A EP11181544A EP2433720B1 EP 2433720 B1 EP2433720 B1 EP 2433720B1 EP 11181544 A EP11181544 A EP 11181544A EP 2433720 B1 EP2433720 B1 EP 2433720B1
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- roll
- bending
- supporting bracket
- machine according
- support bracket
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- 238000005452 bending Methods 0.000 title claims description 35
- 238000013000 roll bending Methods 0.000 title claims description 29
- 238000005096 rolling process Methods 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 12
- 210000005069 ears Anatomy 0.000 claims 5
- 230000000903 blocking effect Effects 0.000 claims 1
- 239000002184 metal Substances 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 101100390736 Danio rerio fign gene Proteins 0.000 description 1
- 101100390738 Mus musculus Fign gene Proteins 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Classifications
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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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
Definitions
- the invention relates to a four-roll bending machine and a method for bending and rolling of sheet metal, with a top roll, a bottom roll and two side rolls, the ends of the upper roll stationary and the ends of the lower roll and the side rolls mounted adjustable on side posts of a machine frame are, and with a pivotally mounted on the machine frame support bracket having at its upper free end an attacking at the top roller attacking upper pressure element and at its lower free end an attacking on the lower roller attacking lower pressure element, wherein the lower pressure piece in the Support bracket is vertically adjustable.
- a four-roll bending machine is already out of the DE 28 47 965 B1 known, the upper and lower support rollers for supporting the upper roller and the lower roller, wherein the upper and lower support rollers are connected via oppositely operating adjusting devices to the ends of the arcuate support bracket.
- the size or the diameter of the tubes to be produced is severely limited, since the support bracket can not be pivoted far enough below the working range of the rollers, wherein also bent for bending the second end of the sheet metal sheet by means of a hall crane by 180 ° must become.
- the invention is therefore an object of the invention to provide a four-roll bending machine and a method of the type specified, in which or in which no hydraulic oil can reach the component to be manufactured, in which or in the tearing out of the foundation screws for the attachment of the support bracket or the machine is excluded with the foundation during the manufacturing process, with or with which the range of sizes or diameters of the pipes to be bent or pipes is not limited, and with the at Bending without using the support bracket, the bending of both sides of the sheet is possible without the sheet must be removed from the machine.
- the upper pressure piece is fixedly secured to the support bracket, wherein the support bracket is designed to be vertically adjustable. All degrees of freedom of the support bracket can be decoupled from the foundation for the machine frame during the bending or rolling.
- the support bracket is mounted with its pivot axis between the lateral limbs of a arranged on the base frame of the machine frame lifting fork, wherein attacking the machine frame, pivoting lifting cylinder for the vertical adjustment of the support bracket at the front free ends of the side legs of the lifting fork.
- pivoting lifting cylinder for the vertical adjustment of the support bracket at the front free ends of the side legs of the lifting fork.
- the pivot axis of the support bracket is provided in the area of the free ends of the web connecting the lateral legs at the rear ends of the same supporting wheels for the pivoting movement or horizontal movement of the lifting fork.
- the web At the free ends of the web are in extension of the lateral legs of the lifting fork thrust or pull tabs pivotally mounted with one of its ends about a horizontal axis.
- the other ends of the thrust and pull tabs are pivotable about a further horizontal axis on bearing blocks of two via a torsion shaft interconnected and mounted on the base frame of the machine frame mounted eccentric.
- the central axis of the torsion shaft extends at a distance parallel to the horizontal axis of the pivotable bearing at the other ends of the thrust and pull tabs below the same.
- the eccentric devices each have below the bearing blocks two at the ends of the bearing blocks attacking, on the base frame of the machine frame supporting and in the longitudinal direction of the push or pull tabs arranged in succession locking cylinder.
- the support bracket is movable by means of a pivotally mounted on the support bracket and on the other hand in the foundation pivot cylinder. In this case, the support bracket is pivoted away by means of the pivoting cylinder to below the upper sides of the lower roller and the side rollers.
- a feeder for the sheets may be provided on the opposite side of the support bracket.
- the feed device is pivotally connected to the machine frame and movable over at least one Zustellzylinder.
- the lifting cylinder for the vertical adjustment of the support bracket and the locking cylinder of the eccentric devices are depressurized, wherein the support bracket at the upper roller and at the lower roller occurring movements when bending or rolling over the lifting fork and the connected via the thrust and pull tabs with the same connected eccentric devices in connection with the torsion shaft in all directions.
- the four-roll bending machine Due to the fixed attachment of the upper pressure piece, the four-roll bending machine according to the invention has no hydraulic oil above the sheet to be bent or rolled, so that contamination of the sheet or the later zuzusch spaenden longitudinal groove between the bent ends of the sheet is excluded by escaping hydraulic oil.
- the vertical delivery of the upper pressure piece to the top roller is achieved by the vertically adjustable support bracket, wherein the support bracket vertically adjusting lifting cylinder is provided below the support bracket.
- the support bracket is used only for bending sheet metal with larger sheet thicknesses, in which the existing crowning of the rollers is no longer sufficient. Since in conventional four-roll bending without support bracket on the basis of the predetermined crowning of the rollers no optimal bending results of the smallest sheet thickness to the maximum sheet thickness are possible in the four-roll bending machine according to the invention in the sheet thickness, where the existing crown of the rolls is not sufficient and the support bracket is used the pressure of the pressure cylinder adjusted accordingly. As a result, the rolling deflection is reduced and adapted to the existing crown.
- the Entkoppeliana all degrees of freedom of the support bracket or in that the swivel cylinder for swinging in and out of the support bracket, the lifting cylinder for the vertical adjustment of the support bracket and the locking cylinder of the eccentric devices are unpressurized during bending, allows the rollers and the respective sheet between the Clamping spanning support bracket to follow the movements of the rolls when bending in all directions, the forces acting on the foundation bolts are substantially reduced compared to conventional four-roll bending machines.
- the four-roll bending machine 1 shown in the figures which serves for bending and rolling of sheet metal on and round, consists of a machine frame 2 and two with the machine frame 2 connected side uprights 3 (in the FIGS. 1 and 2 to 6 has been omitted for better recognition of the front in the foreground stand 3), in which a top roller 4, a bottom roller 5 and two side rollers 6, 7 are stored.
- the ends of the upper roller 4 are stationary and the ends of the lower roller 5 and the ends of the two side rollers 6, 7 arranged adjustably on the side uprights 3.
- support bracket 8 To support the upper roller 4 and the lower roller 5 a pivotally mounted on the machine frame 2 support bracket 8 is provided, which has at its upper free end 9 an attacking on the upper roller 4 attacking upper thrust piece 10, which is preferably fixedly secured to the support bracket 8 , At the free lower end 11 of the support bracket 8 is an attacking on the lower roller 5 attacking lower pressure member 12 is provided, which is arranged vertically adjustable in the support bracket 8.
- pivot cylinder 14 For pivoting the support bracket 8 a hinged on the one hand on the support bracket 8 and the other part in the base 13 pivot cylinder 14 is provided, wherein the pivot cylinder 14 is preferably arranged in the foundation 13, that the support bracket 8 with its upper edge below the tops of the lower roller 5 and the side rollers 6, 7 is swinging away (see Fig. 1 ). This allows unlimited pipe diameters.
- the swivel cylinder 14 can also be arranged in the foundation 13 in a less preferred embodiment such that the support bracket 8 can be pivoted away with its upper edge only to above the upper sides of the lower roller 5 and the side rollers 6, 7 (see Fign . 3 to 6 )
- the entire support bracket 8 with the upper pressure member 10 is lowered vertically after pivoting up to the upper roller 4 (see Fig. 5 ) and simultaneously or subsequently the vertically adjustable lower pressure piece 12 is raised to the lower roller 5 (see Fig. 6 ).
- a pressure cylinder 15 integrated, at the piston rod 16, the lower pressure member 12 is attached.
- the lifting cylinders 17 engage the front free ends 18 of lateral legs 19 of a lifting fork 20, in which the support bracket 8 with its pivot axis 21 between the lateral Legs 19 which is mounted on the base frame 22 of the machine frame 2 (see Fig. 2 ).
- the support bracket 8 with its pivot axis 21 between the lateral Legs 19 which is mounted on the base frame 22 of the machine frame 2 (see Fig. 2 ).
- the base frame 22 supporting wheels 26 for the pivoting movement of the lifting fork 20 when raising and lowering the support bracket 8 and for the horizontal movement of Lifting fork 20 arranged when bending.
- the pivot axis 21 of the support bracket 8 is provided between the lifting cylinders 17 and the wheels 26.
- the support bracket 8 when bending the respective sheet according to the movement of the rollers 4, 5 can move in all degrees of freedom, at the free ends 23 of the web 25 in extension of the lateral legs 19 of the lifting fork 20 thrust or pull tabs 27 with the one of its ends 28 pivotally mounted about a horizontal axis 29.
- the other ends 30 of the push or pull tabs 27 are in turn pivotally mounted about a further horizontal axis 31 on bearing blocks 32 of two interconnected via a torsion 33 and attached to the base frame 22 of the machine frame 2 eccentric 34.
- the central axis 35 of the torsion shaft 33 extends at a distance a parallel to the horizontal axis 31 of the pivotable mounting at the other ends 30 of the thrust and pull tabs 27 below the same.
- the eccentric devices 34 each have below the bearing blocks 32 two acting on the ends of the bearing blocks 32, on the base frame 22 of the machine frame 2 supporting and in the longitudinal direction of the Push or pull tabs 27 successively arranged locking cylinder 36, which ensure that the eccentric means 34 are blocked during the pivoting of the support bracket 8 to the clamping of the rollers 4, 5 by means of the pressure pieces 10, 12.
- the locking cylinder 36, the lifting cylinder 17 and the swing cylinder 14 are depressurized, so that the support bracket 8 with the rollers 4, 5 on the lifting fork 20, the push or pull tabs 27, the eccentric 34 and the torsion 33 in can move in all directions, wherein the rollers 4, 5 are clamped with a permanent pressure between the pressure pieces 10, 14.
- a feeder for the sheets may be provided (not shown), which is preferably pivotally connected to the machine frame 2 and is movable over at least one Zustellzylinder with which the slope of the feeder is adjustable.
- the support bracket 8 After insertion of the sheet to be bent and the pressure-controlled clamping same between the upper roller 4 and the lower roller 5 by vertical movement of the lower roller 5, the support bracket 8 is first pivoted so far from a Parkpostion until the upper pressure piece 10 is above the upper roller 4, wherein then the support bracket 8 is lowered so far about the lifting cylinder 17 until the upper pressure piece 10 rests on the top roller 4, and at the same time or subsequently the lower pressure piece 12 is vertically lifted by means of the pressure cylinder 15 until the lower pressure piece 12 at the Bottom roller 5 is present. After reaching the required support pressure, the locking cylinder, 36, the lifting cylinder 17 and the swing cylinder 14 are depressurized, whereupon the bending operation of the first side of the sheet by means of the side rollers 6, 7 begins.
- the sheet is from the four-roll bending machine 1, turned 180 ° and returned to the four-roll bending machine, whereupon the bending operation of the second side of the sheet begins.
- the locking cylinder, 36, the lifting cylinder 17 and the pivot cylinder 14 again pressurized, the lower pressure member 12 by means of the Andrückzylinders 15 in its lower position and the support bracket 8 by means of the lifting cylinder 16 in its upper position is moved. Thereafter, the pivoting away of the support bracket 8 by means of the pivot cylinder 14, whereupon the actual round bending process can begin.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Die Erfindung betrifft eine Vierwalzenbiegemaschine und ein Verfahren zum An- und Rundbiegen bzw. -walzen von Blechen, mit einer Oberwalze, einer Unterwalze und zwei Seitenwalzen, wobei die Enden der Oberwalze ortsfest und die Enden der Unterwalze sowie der Seitenwalzen verstellbar an Seitenständern eines Maschinengestells gelagert sind, und mit einem an dem Maschinengestell schwenkbar gelagerten Stützbügel, der an seinem oberen freien Ende ein beim Anbiegen an der Oberwalze angreifendes oberes Druckstück und an seinem unteren freien Ende ein beim Anbiegen an der Unterwalze angreifendes unteres Druckstück aufweist, wobei das untere Druckstück in dem Stützbügel vertikal verstellbar ist.The invention relates to a four-roll bending machine and a method for bending and rolling of sheet metal, with a top roll, a bottom roll and two side rolls, the ends of the upper roll stationary and the ends of the lower roll and the side rolls mounted adjustable on side posts of a machine frame are, and with a pivotally mounted on the machine frame support bracket having at its upper free end an attacking at the top roller attacking upper pressure element and at its lower free end an attacking on the lower roller attacking lower pressure element, wherein the lower pressure piece in the Support bracket is vertically adjustable.
Eine Vierwalzenbiegemaschine ist bereits aus der
Bei der vorgenannten Vierwalzenbiegemaschine tritt jedoch das Problem auf, dass bei Undichtigkeiten aufgrund auftretender Querkräfte und verschlissenen Dichtungssystemen der Andrückzylinder das Hydrauliköl der oberen Verstellvorrichtung bzw. Zylinders zwangsläufig auf das zu biegende bzw. zu walzende Blech gelangt. Dies wiederum erfordert in einigen bestimmten Industriezweigen erhöhte Reinigungsmaßnahmen bevor die Längsnaht des beim Biegen bzw. Walzen entstandenen Rohres geschweißt werden darf, was wiederum zwangläufig zu erhöhten Herstellkosten führt.In the aforementioned four-roll bending machine, however, the problem arises that, in the case of leaks due to transverse forces and worn sealing systems, the pressure cylinder forcibly reaches the hydraulic oil of the upper adjusting device or cylinder on the sheet to be bent or rolled. This in turn requires in some specific industries increased cleaning measures before the longitudinal seam of the resulting tube during bending or rolling must be welded, which in turn inevitably leads to increased manufacturing costs.
Ein weiteres Problem ist darin zu sehen, dass insbesondere beim Anbiegen der Enden des jeweiligen Bleches sehr hohe Kräfte in allen Richtungen auftreten. Dies führt jedoch dazu, dass aufgrund der relativ starren Verbindung des Stützbügels mit dem Fundament die in demselben eingesetzten Fundamentschrauben für die Befestigung des Stützbügel bzw. der Maschine mit dem Fundament von den auftretenden Kräften und Bewegungen so sehr belastet werden, das diese aus demselben herausgerissen werden.Another problem is that in particular when bending the ends of the respective sheet very high forces occur in all directions. However, this leads to the fact that due to the relatively rigid connection of the support bracket to the foundation in the same foundation bolts used for the attachment of the support bracket or the machine with the foundation of the forces and movements are so much burdened that they are torn out of the same ,
Ferner ist mit der vorgenannten Vierwalzenbiegemaschine die Größe bzw. der Durchmesser der herzustellenden Rohre stark begrenzt, da der Stützbügel nicht weit genug unterhalb des Arbeitbereiches der Walzen weggeschwenkt werden kann, wobei zudem zum Anbiegen des zweiten Blechendes das jeweilige Blech mittels eines Hallenkrans um 180° gedreht werden muss.Further, with the aforementioned four-roll bending machine, the size or the diameter of the tubes to be produced is severely limited, since the support bracket can not be pivoted far enough below the working range of the rollers, wherein also bent for bending the second end of the sheet metal sheet by means of a hall crane by 180 ° must become.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vierwalzenbiegemaschine sowie ein Verfahren der angegebenen Gattung zu schaffen, bei der bzw. bei dem kein Hydrauliköl auf das herzustellende Bauteil gelangen kann, bei der bzw. bei dem ein Herausreißen der Fundamentschrauben für die Befestigung des Stützbügel bzw. der Maschine mit dem Fundament während des Fertigungsprozesses ausgeschlossen ist, mit der bzw. mit dem der Bereich der Größen bzw. Durchmesser der zu biegenden bzw. Rohren nicht eingeschränkt ist, und mit der bzw. dem beim Anbiegen ohne Verwendung des Stützbügel das Anbiegen beider Seiten des Bleches möglich ist, ohne dass das Blech aus der Maschine entnommen werden muss.The invention is therefore an object of the invention to provide a four-roll bending machine and a method of the type specified, in which or in which no hydraulic oil can reach the component to be manufactured, in which or in the tearing out of the foundation screws for the attachment of the support bracket or the machine is excluded with the foundation during the manufacturing process, with or with which the range of sizes or diameters of the pipes to be bent or pipes is not limited, and with the at Bending without using the support bracket, the bending of both sides of the sheet is possible without the sheet must be removed from the machine.
Diese Aufgabe wird erfindungsgemäß durch eine Vierwalzenbiegemaschine mit den Kennzeichnungsmerkmalen des Patentanspruchs 1 und durch ein Verfahren mit den Kennzeichnungsmerkmalen des Patentanspruchs 10 gelöst.This object is achieved by a four-roll bending machine with the characterizing features of claim 1 and by a method with the characterizing features of
Zweckmäßige Weiterbildungen der Vierwalzenbiegemaschine sind in den Unteransprüchen gekennzeichnet.Advantageous developments of the four-roll bending machine are characterized in the subclaims.
Bei der erfindungsgemäßen Vierwalzenbiegemaschine ist das obere Druckstück ortsfest an dem Stützbügel befestigt, wobei der Stützbügel vertikal verstellbar ausgebildet ist. Sämtliche Freiheitsgrade des Stützbügels sind während des Anbiegens bzw. -walzens vom Fundament für das Maschinengestell entkoppelbar.In the four-roll bending machine according to the invention, the upper pressure piece is fixedly secured to the support bracket, wherein the support bracket is designed to be vertically adjustable. All degrees of freedom of the support bracket can be decoupled from the foundation for the machine frame during the bending or rolling.
Der Stützbügel ist mit seiner Schwenkachse zwischen den seitlichen Schenkeln einer am Grundrahmen des Maschinengestells angeordneten Hubgabel gelagert, wobei an den vorderen freien Enden der seitlichen Schenkel der Hubgabel sich am Maschinengestell abstützende, schwenkbare Hubzylinder für die vertikale Verstellung des Stützbügels angreifen. Im Bereich der freien Enden des die seitlichen Schenkel an den hinteren Enden derselben verbindenden Steges sind sich auf dem Grundrahmen abstützende Laufräder für die Schwenkbewegung bzw. horizontale Bewegung der Hubgabel angeordnet, wobei zwischen dem Hubzylinder und den Laufrädern die Schwenkachse des Stützbügels vorgesehen ist.The support bracket is mounted with its pivot axis between the lateral limbs of a arranged on the base frame of the machine frame lifting fork, wherein attacking the machine frame, pivoting lifting cylinder for the vertical adjustment of the support bracket at the front free ends of the side legs of the lifting fork. In the area of the free ends of the web connecting the lateral legs at the rear ends of the same supporting wheels for the pivoting movement or horizontal movement of the lifting fork are arranged on the base frame, wherein between the lifting cylinder and the wheels, the pivot axis of the support bracket is provided.
An den freien Enden des Steges sind in Verlängerung der seitlichen Schenkel der Hubgabel Schub- bzw. Zuglaschen mit den einen ihrer Enden um eine horizontale Achse schwenkbar gelagert. Die anderen Enden der Schub- bzw. Zuglaschen sind schwenkbar um eine weitere horizontale Achse an Lagerböcken zweier über eine Torsionswelle miteinander verbundener und an dem Grundrahmen des Maschinengestells befestigter Exzentereinrichtungen gelagert.At the free ends of the web are in extension of the lateral legs of the lifting fork thrust or pull tabs pivotally mounted with one of its ends about a horizontal axis. The other ends of the thrust and pull tabs are pivotable about a further horizontal axis on bearing blocks of two via a torsion shaft interconnected and mounted on the base frame of the machine frame mounted eccentric.
Die Mittelachse der Torsionswelle verläuft mit Abstand parallel zu der horizontalen Achse der schwenkbaren Lagerung an den anderen Enden der Schub- bzw. Zuglaschen unterhalb derselben.The central axis of the torsion shaft extends at a distance parallel to the horizontal axis of the pivotable bearing at the other ends of the thrust and pull tabs below the same.
Die Exzentereinrichtungen weisen jeweils unterhalb der Lagerböcke zwei an den Enden der Lagerböcke angreifende, sich an dem Grundrahmen des Maschinengestells abstützende und in Längsrichtung der Schub- bzw. Zuglaschen hintereinander angeordnete Feststellzylinder auf.The eccentric devices each have below the bearing blocks two at the ends of the bearing blocks attacking, on the base frame of the machine frame supporting and in the longitudinal direction of the push or pull tabs arranged in succession locking cylinder.
Der Stützbügel ist mittels eines einerseits am Stützbügel und andererseits im Fundament angelenkten Schwenkzylinders bewegbar. Dabei ist der Stützbügel mittels des Schwenkzylinders bis unterhalb der Oberseiten der Unterwalze und der Seitenwalzen wegschwenkbar.The support bracket is movable by means of a pivotally mounted on the support bracket and on the other hand in the foundation pivot cylinder. In this case, the support bracket is pivoted away by means of the pivoting cylinder to below the upper sides of the lower roller and the side rollers.
Auf der dem Stützbügel gegenüberliegenden Seite kann eine Zuführeinrichtung für die Bleche vorgesehen sein. Vorzugsweise ist die Zuführeinrichtung schwenkbar mit dem Maschinengestell verbunden und über mindestens einen Zustellzylinder bewegbar.On the opposite side of the support bracket, a feeder for the sheets may be provided. Preferably, the feed device is pivotally connected to the machine frame and movable over at least one Zustellzylinder.
Bei dem erfindungsgemäßen Verfahren zum An- und Rundbiegen bzw. — walzen von Blechen wird der Stützbügel nach den Einschwenken desselben aus einer Parkposition soweit abgesenkt, bis dass das obere Druckstück auf der Oberwalze anliegt, wobei gleichzeitig oder anschließend das untere Druckstück vertikal soweit angehoben wird, bis dass das untere Druckstück an der Unterwalze unterhalb derselben anliegt. Dabei ist die Oberwalze und die Unterwalze druckgeregelt mit dem zwischen denselben hindurchlaufenden Blech zwischen den Druckstücken eingespannt. Zumindest beim Anbiegen der Enden des jeweiligen Bleches sind der Schwenkzylinder für das Ein- und Ausschwenken des Stützbügels, die Hubzylinder für die vertikale Verstellung des Stützbügels sowie die Feststellzylinder der Exzentereinrichtungen drucklos, wobei der Stützbügel an der Oberwalze und an der Unterwalze auftretenden Bewegungen beim Biegen bzw. Walzen über die Hubgabel und die über die Schubund Zuglaschen mit derselben verbundenen Exzentereinrichtungen in Verbindung mit der Torsionswelle in sämtlichen Richtungen folgt.In the method according to the invention for on and round bending or rolling of metal sheets of the support bracket is the same pivoted from a parking position until it engages the upper pressure piece on the top roller, at the same time or subsequently the lower pressure piece is lifted vertically so far until the lower pressure piece rests against the lower roller below it. In this case, the upper roller and the lower roller is pressure-controlled with the sheet passing between them clamped between the pressure pieces. At least when bending the ends of the respective sheet of the swivel cylinder for swinging in and out of the support bracket, the lifting cylinder for the vertical adjustment of the support bracket and the locking cylinder of the eccentric devices are depressurized, wherein the support bracket at the upper roller and at the lower roller occurring movements when bending or rolling over the lifting fork and the connected via the thrust and pull tabs with the same connected eccentric devices in connection with the torsion shaft in all directions.
Durch die ortsfeste Befestigung des oberen Druckstückes weist die erfindungsgemäße Vierwalzenbiegemaschine oberhalb des zu biegenden bzw. walzenden Bleches kein Hydrauliköl auf, so dass eine Verschmutzung des Bleches bzw. der später zuzuschweißenden Längsnut zwischen den gebogenen Enden des Bleches durch austretendes Hydrauliköl ausgeschlossen ist. Das vertikale Zustellen des oberen Druckstückes zur Oberwalze hin wird durch den vertikal verstellbaren Stützbügel erreicht, wobei die den Stützbügel vertikal verstellenden Hubzylinder unterhalb des Stützbügels vorgesehen ist.Due to the fixed attachment of the upper pressure piece, the four-roll bending machine according to the invention has no hydraulic oil above the sheet to be bent or rolled, so that contamination of the sheet or the later zuzuschweißenden longitudinal groove between the bent ends of the sheet is excluded by escaping hydraulic oil. The vertical delivery of the upper pressure piece to the top roller is achieved by the vertically adjustable support bracket, wherein the support bracket vertically adjusting lifting cylinder is provided below the support bracket.
Der Stützbügel dient lediglich zum Anbiegen von Blechen mit größeren Blechdicken, bei denen die vorhandene Balligkeit der Walzen nicht mehr ausreicht. Da bei herkömmlichen Vierwalzenbiegemaschinen ohne Stützbügel anhand der vorgegebenen Balligkeit der Walzen keine optimalen Anbiegeergebnisse von der geringsten Blechdicke bis zur maximalen Blechdicke möglich sind, wird bei der erfindungsgemäßen Vierwalzenbiegemaschine bei den Blechdicken, bei denen die vorhandene Balligkeit der Walzen nicht ausreicht und der Stützbügel eingesetzt wird, der Druck der Andrückzylinder entsprechend eingestellt. Dadurch wird die Walzendurchbiegung reduziert und an die vorhandene Balligkeit angepasst.The support bracket is used only for bending sheet metal with larger sheet thicknesses, in which the existing crowning of the rollers is no longer sufficient. Since in conventional four-roll bending without support bracket on the basis of the predetermined crowning of the rollers no optimal bending results of the smallest sheet thickness to the maximum sheet thickness are possible in the four-roll bending machine according to the invention in the sheet thickness, where the existing crown of the rolls is not sufficient and the support bracket is used the pressure of the pressure cylinder adjusted accordingly. As a result, the rolling deflection is reduced and adapted to the existing crown.
Die Entkoppelbarkeit sämtlicher Freiheitsgrade des Stützbügel bzw. dadurch, dass der Schwenkzylinder für das Ein- und Ausschwenken des Stützbügels, die Hubzylinder für die vertikale Verstellung des Stützbügels sowie die Feststellzylinder der Exzentereinrichtungen beim Anbiegen drucklos sind, ermöglicht dem die Walzen und das jeweilige Blech zwischen den Druckstücken einspannenden Stützbügel den Bewegungen der Walzen beim Biegen in sämtlichen Richtungen zu folgen, wobei die auf die Fundamentschrauben wirkenden Kräfte gegenüber herkömmlichen Vierwalzenbiegemaschinen wesentlich reduziert sind.The Entkoppelbarkeit all degrees of freedom of the support bracket or in that the swivel cylinder for swinging in and out of the support bracket, the lifting cylinder for the vertical adjustment of the support bracket and the locking cylinder of the eccentric devices are unpressurized during bending, allows the rollers and the respective sheet between the Clamping spanning support bracket to follow the movements of the rolls when bending in all directions, the forces acting on the foundation bolts are substantially reduced compared to conventional four-roll bending machines.
Nachfolgend wird anhand der Zeichnung eine bevorzugte Ausführungsform der Vierwalzenbiegemaschine näher erläutert.Hereinafter, a preferred embodiment of the four-roll bending machine will be explained in detail with reference to the drawing.
Es zeigen
- Fig. 1
- eine Seitenansicht der Vierwalzenbiegemaschine ohne den vorderen Seitenständer, in der der Stützbügel bis unterhalb der Walzen weggeschwenkbar ist,
- Fig. 2
- perspektivisch eine Ansicht auf die Hubgabel und die daran über die Schub- bzw. Zuglaschen angreifenden Exzentereinrichtungen mit Torsionswelle,
- Fig. 3
- eine Seitenansicht der Vierwalzenbiegemaschine ohne den vorderen Seitenständer, in der der Stützbügel lediglich bis oberhalb der Walzen wegschwenkbar ist,
- Fig. 4
- eine Seitenansicht wie
Fig. 3 mit eingeschwenktem Stützbügel, - Fig. 5
- eine Seitenansicht wie
Fig. 3 mit eingeschwenktem und abgesenktem Stützbügel bzw. oberem Druckstück und - Fig. 6
- eine Seitenansicht wie
Fig. 3 mit eingeschwenktem und abgesenktem Stützbügel bzw. oberem Druckstück sowie angehobenem unteren Druckstück.
- Fig. 1
- a side view of the four-roll bending machine without the front side stand, in which the support bracket is pivoted to below the rollers,
- Fig. 2
- perspective view of the lifting fork and the thereon acting on the push or pull straps eccentric with torsion,
- Fig. 3
- a side view of the four-roll bending machine without the front side stand, in which the support bracket is pivotable only to above the rollers,
- Fig. 4
- a side view like
Fig. 3 with pivoted support bracket, - Fig. 5
- a side view like
Fig. 3 with pivoted-in and lowered support bracket or upper pressure piece and - Fig. 6
- a side view like
Fig. 3 with pivoted-in and lowered support bracket or upper pressure piece and raised lower pressure piece.
Die in den Figuren dargestellte Vierwalzenbiegemaschine 1, die zum An- und Rundbiegen bzw. ―walzen von Blechen dient, besteht aus einem Maschinengestell 2 und zwei mit dem Maschinengestell 2 verbundenen Seitenständern 3 (in den
Zur Abstützung der Oberwalze 4 und der Unterwalze 5 ist ein an dem Maschinengestell 2 schwenkbar gelagerter Stützbügel 8 vorgesehen, der an seinem oberen freien Ende 9 ein beim Anbiegen an der Oberwalze 4 angreifendes oberes Druckstück 10 aufweist, das vorzugsweise ortsfest an dem Stützbügel 8 befestigt ist. Am freien unteren Ende 11 des Stützbügels 8 ist ein beim Anbiegen an der Unterwalze 5 angreifendes unteres Druckstück 12 vorgesehen, das in dem Stützbügel 8 vertikal verstellbar angeordnet ist.To support the
Zum Schwenken des Stützbügels 8 ist ein einerseits am Stützbügel 8 und andererseits im Fundament 13 angelenkter Schwenkzylinder 14 vorgesehen, wobei der Schwenkzylinder 14 vorzugsweise so im Fundament 13 angeordnet ist, dass der Stützbügel 8 mit seiner oberen Kante unterhalb der Oberseiten der Unterwalze 5 und der Seitenwalzen 6, 7 wegschwenkbar ist (siehe
Der Schwenkzylinder 14 kann aber auch bei einer weniger bevorzugten Ausführungsform so im Fundament 13 angeordnet sein, dass der Stützbügel 8 mit seiner oberen Kante lediglich bis oberhalb der Oberseiten der Unterwalze 5 und der Seitenwalzen 6, 7 wegschwenkbar ist (siehe
Um den Stützbügel 8 mit den Druckstücken 10, 12 zur Anlage an der Oberwalze 4 bzw. an der Unterwalze 5 zu bringen, wird der gesamte Stützbügel 8 mit dem oberen Druckstück 10 nach dem Einschwenken bis an die Oberwalze 4 vertikal abgesenkt (siehe
Die vertikale Verstellung des Stützbügels 8 verrichten sich einerseits am Maschinengestell 2 abstützende, schwenkbare Hubzylinder 17. Andererseits greifen die Hubzylinder 17 an den vorderen freien Enden 18 von seitlichen Schenkeln 19 einer Hubgabel 20 an, in der der Stützbügel 8 mit seiner Schwenkachse 21 zwischen den seitlichen Schenkeln 19 der am Grundrahmen 22 des Maschinengestells 2 gelagert ist (siehe
Damit sich der Stützbügel 8 beim Anbiegen des jeweiligen Bleches entsprechend der Bewegung der Walzen 4, 5 in sämtlichen Freiheitsgraden bewegen kann, sind an den freien Enden 23 des Steges 25 in Verlängerung der seitlichen Schenkel 19 der Hubgabel 20 Schub- bzw. Zuglaschen 27 mit den einen ihrer Enden 28 um eine horizontale Achse 29 schwenkbar gelagert. Die anderen Enden 30 der Schub- bzw. Zuglaschen 27 sind wiederum schwenkbar um eine weitere horizontale Achse 31 an Lagerböcken 32 zweier über eine Torsionswelle 33 miteinander verbundener und an dem Grundrahmen 22 des Maschinengestells 2 befestigter Exzentereinrichtungen 34 gelagert. Dabei verläuft die Mittelachse 35 der Torsionswelle 33 mit Abstand a parallel zu der horizontalen Achse 31 der schwenkbaren Lagerung an den anderen Enden 30 der Schub- bzw. Zuglaschen 27 unterhalb derselben.Thus, the
Die Exzentereinrichtungen 34 weisen jeweils unterhalb der Lagerböcke 32 zwei an den Enden der Lagerböcke 32 angreifende, sich an dem Grundrahmen 22 des Maschinengestells 2 abstützende und in Längsrichtung der Schub- bzw. Zuglaschen 27 hintereinander angeordnete Feststellzylinder 36 auf, die dafür sorgen, dass die Exzentereinrichtungen 34 während des Einschwenkens des Stützbügel 8 bis zum Einspannen der Walzen 4, 5 mittels der Druckstücke 10, 12 blockiert sind. Während des Anbiegevorgangs sind die Feststellzylinder 36, die Hubzylinder 17 sowie der Schwenkzylinder 14 drucklos, so dass sich der Stützbügel 8 mit den Walzen 4, 5 über die Hubgabel 20, den Schub- bzw. Zuglaschen 27, der Exzentereinrichtungen 34 und der Torsionswelle 33 in allen Richtungen bewegen kann, wobei die Walzen 4, 5 mit dauerhaftem Druck zwischen den Druckstücken 10, 14 eingespannt sind.The
Auf der dem Stützbügel 8 gegenüberliegenden Seite kann eine Zuführeinrichtung für die Bleche vorgesehen sein (nicht dargestellt), die vorzugsweise schwenkbar mit dem Maschinengestell 2 verbunden ist und über mindestens einen Zustellzylinder bewegbar ist, mit dem die Schräge der Zuführeinrichtung einstellbar ist.On the opposite side of the
Nachfolgend wird noch kurz ein Verfahren zum An- und Rundbiegen bzw. ―walzen näher erläutert.In the following, a method for bending on and round bending or rolling will be explained in more detail.
Nach dem Einführen des zu biegenden Bleches und dem druckgeregelten Einspannen desselben zwischen der Oberwalze 4 und der Unterwalze 5 durch vertikales Verfahren der Unterwalze 5 wird zunächst der Stützbügel 8 aus einer Parkpostion soweit eingeschwenkt, bis das sich das obere Druckstück 10 oberhalb der Oberwalze 4 befindet, wobei anschließend der Stützbügel 8 über die Hubzylinder 17 soweit abgesenkt wird, bis dass das obere Druckstück 10 auf der Oberwalze 4 aufliegt, und gleichzeitig oder anschließend das untere Druckstück 12 mittels des Andrückzylinders 15 vertikal soweit angehoben wird, bis dass das untere Druckstück 12 an der Unterwalze 5 anliegt. Nach dem Erreichen des erforderlichen Stützdruckes werden die Feststellzylinder, 36, die Hubzylinder 17 sowie der Schwenkzylinder 14 drucklos geschaltet, woraufhin der Anbiegevorgang der ersten Seite des Bleches mittels der Seitenwalzen 6, 7 beginnt. Nach Abschluss des Anbiegevorgangs wird das Blech aus der Vierwalzenbiegemaschine 1 entnommen, um 180° gewendet und der Vierwalzenbiegemaschine wieder zugeführt, woraufhin der Anbiegevorgang der zweiten Seite des Bleches beginnt. Nachdem auch dieser Anbiegevorgang abgeschlossen ist, werden die Feststellzylinder, 36, die Hubzylinder 17 sowie der Schwenkzylinder 14 wieder mit Druck beaufschlagt, wobei das untere Druckstück 12 mittels des Andrückzylinders 15 in seine untere Position und der Stützbügel 8 mittels der Hubzylinder 16 in seine obere Position bewegt wird. Danach erfolgt das Wegschwenken des Stützbügels 8 mittels des Schwenkzylinders 14, woraufhin der eigentliche Rundbiegevorgang beginnen kann.After insertion of the sheet to be bent and the pressure-controlled clamping same between the
Claims (10)
- A four-roll bending machine (1) for pre-bending and round bending or rolling of plates, having an upper roll (4), a lower roll (5) and two side rolls (6, 7), wherein the ends of the upper roll (4) are stationarily mounted and the ends of the lower roll (5) and of the side rolls (6, 7) are adjustably mounted on side stands (3) of a machine frame (2), and having a supporting bracket (8) that is pivotably mounted on the machine frame (2), and which presents, on its upper free end (9), an upper pressure piece (10) that engages the upper roll (4) during the pre-bending process as well as, on its lower free end (11), a lower pressure piece (12) that engages the lower roll (5) during the pre-bending process, wherein the lower pressure piece (12) can be vertically adjusted inside the supporting bracket (8),
characterised in that
the upper pressure piece (10) is stationarily fixed onto the supporting bracket (8), in that the supporting bracket (8) is formed to be vertically adjustable, and in that all degrees of freedom of the supporting bracket (8) can be decoupled from the base (13) for the machine frame (2) during the pre-bending or pre-rolling process. - The four-roll bending machine according to claim 1,
characterised in that
the supporting bracket (8) is, with its pivot axis (21), mounted between the lateral flanks (19) of a lifting fork (20) that is arranged at the base frame (22) of the machine frame (2), wherein lifting cylinders (17), which support themselves at the machine frame (2) and which are pivotable, engage at the front free ends (18) of the lateral flanks (19) of the lifting fork (20) for the vertical adjustment of the supporting bracket (8), in the area of the free ends (23) of the crosspiece (25) that connects the lateral flanks (19) at the back ends (24) of the same, carrying wheels (26) that support themselves on the base frame (22) are arranged for the pivoting movement and the horizontal movement, respectively, of the lifting fork (20) and, the pivot axis (21) of the supporting bracket (8) is provided between the lifting cylinders (17) and the carrying wheels (26). - The four-roll bending machine according to claim 1 or 2,
characterised in that
on the free ends (23) of the crosspiece (25), as an extension of the lateral flanks (19) of the lifting fork (20), thrust or traction ears (27) are pivotably mounted around a horizontal axis (29) with one of their ends (28), wherein the other end (30) of the thrust or traction ears (27) is mounted at bearing supports (32) of two eccentric devices (34) that are connected to each other via a torsional shaft (33) and that are fixed onto the base frame (22) of the machine frame (2), being pivotable around another horizontal axis (31). - The four-roll bending machine according to claim 3,
characterised in that
the central axis (35) of the torsional shaft (33), with the distance (a), runs parallel to the horizontal axis (31) of the pivotable bearing on the other ends (30) of the thrust or traction ears (27) below the same. - The four-roll bending machine according to claim 3 or 4,
characterised in that
the eccentric devices (34) comprise, below the bearing supports (32), respectively, two locking cylinders (36) that engage on the ends of the bearing supports (32) and that support themselves at the base frame (22) of the machine frame (2) and that are arranged in a row in the longitudinal direction of the thrust or traction ears (27). - The four-roll bending machine according to any one of the claims 1 to 5,
characterised in that
the supporting bracket (8) can be moved by means of a pivot cylinder (14) that is hinged, on one side, at the supporting bracket (8) and on the other side, in the base (13). - The four-roll bending machine according to claim 6,
characterised in that
the supporting bracket (8) can be pivoted away by means of the pivot cylinder (14) as far as below the upper sides of the lower roll (5) and of the side rolls (6, 7). - The four-roll bending machine according to any one of the claims 1 to 7,
characterised in that
on the side facing away from the supporting bracket (8), a feeding device for the plates is provided. - The four-roll bending machine according to claim 8,
characterised in that
the feeding device is pivotably connected to the machine frame (2) and can be moved by at least one blocking cylinder. - A method for pre-bending and round bending or rolling of plates using the four-roll bending machine according to the claims 1 to 9,
characterised in that
the supporting bracket (8) is lowered, after having been pivoted in from a stand-by position, until the upper pressure piece (10) rests on the upper roll (4), wherein, at the same time or subsequently, the lower pressure piece (12) is vertically lifted until the lower pressure piece (12) rests against the lower roll (5) below the same, wherein the upper roll (4) and the lower roll (5) are clamped between the pressure pieces (10, 12) with pressure control together with the plate that passes between the same, and in that at least when pre-bending the ends of the respective plate, the pivot cylinder (14) for pivoting the supporting bracket (8) in and out, the lifting cylinders (17) for the vertical adjustment of the supporting bracket (8) and the locking cylinders (36) of the eccentric devices (34) are non-pressurised, wherein, during the bending or the rolling processes, via the lifting fork (20) and the eccentric devices (34) that are connected to the same by the thrust or traction ears (27), the supporting bracket (8), in connection with the torsional shaft (33), follows movements that occur at the upper roll (4) and at the lower roll (5) in all directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL11181544T PL2433720T3 (en) | 2010-09-23 | 2011-09-16 | Four-roll bending machine and method for bending, round bending and rolling sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010041296A DE102010041296A1 (en) | 2010-09-23 | 2010-09-23 | Four-roll bending machine and method for bending and rolling sheet metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2433720A1 EP2433720A1 (en) | 2012-03-28 |
| EP2433720B1 true EP2433720B1 (en) | 2013-11-13 |
Family
ID=45044305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11181544.5A Active EP2433720B1 (en) | 2010-09-23 | 2011-09-16 | Four-roll bending machine and method for bending, round bending and rolling sheet |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2433720B1 (en) |
| DE (1) | DE102010041296A1 (en) |
| PL (1) | PL2433720T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607505A (en) * | 2015-01-21 | 2015-05-13 | 上海理工大学 | Veneer reeling machine |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20120710A1 (en) * | 2012-08-07 | 2014-02-08 | Mauro Meliga | BENDING MACHINE FOR BENDING PROFILES, SHEETS AND THE LIKE |
| CN104624745B (en) * | 2015-01-20 | 2017-08-04 | 江苏和平动力机械有限公司 | Automatic spheronizator |
| CN104588459A (en) * | 2015-02-10 | 2015-05-06 | 南通超力卷板机制造有限公司 | Four-roller pre-bending plate bending machine |
| CN105537334B (en) * | 2016-01-25 | 2017-05-31 | 上海理工大学 | Argosy three rolls plate bending machine |
| CN106363097B (en) * | 2016-08-31 | 2019-05-31 | 北京创然铝塑工业有限公司 | A kind of four-roller compounding machine and roll bending technique |
| CN108580606B (en) * | 2018-04-27 | 2019-11-22 | 南通威锋重工机械有限公司 | A kind of three-roller linkage adjustable numerical control four-roll plate bending machine |
| CN108817149B (en) * | 2018-05-29 | 2019-08-30 | 江苏金泽重机集团有限公司 | A kind of horizontal down-regulation type numerical control plate bending roll |
| CN109047403A (en) * | 2018-09-17 | 2018-12-21 | 顺德职业技术学院 | Gap can adjust automatically four-roller furling plate round machine |
| DE102022103815B4 (en) | 2022-02-17 | 2023-12-28 | Haeusler Ag Duggingen | Bending a sheet of metal into a piece of pipe |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT938695B (en) * | 1971-10-01 | 1973-02-10 | Verrina Spa | BENDING MACHINE ROLLING MACHINE FOR SHEET |
| DE2845965C2 (en) | 1978-10-21 | 1983-01-20 | Fritz Eichenauer GmbH & Co KG, 6744 Kandel | Electric resistance heating element |
| DE2847965C2 (en) * | 1978-11-04 | 1980-12-11 | Schaefer Maschbau Wilhelm | Four roll bending machine |
| CH688437A5 (en) * | 1990-04-12 | 1997-09-30 | Haeusler Ag Chr | For Cylindrical-bending a plate serving forming machine. |
| IT223460Z2 (en) * | 1990-09-28 | 1995-07-19 | Davi Spa | BENDING CALENDER WITH 4 SHAPING ROLLERS WITH LONGITUDINAL ANTI-DEFLECTION SUPPORTS AND SEASES OF CONTRAST ROLLERS. |
| JP3561540B2 (en) * | 1994-10-25 | 2004-09-02 | アイセル株式会社 | Upper roll support device for roll bending device |
-
2010
- 2010-09-23 DE DE102010041296A patent/DE102010041296A1/en not_active Withdrawn
-
2011
- 2011-09-16 EP EP11181544.5A patent/EP2433720B1/en active Active
- 2011-09-16 PL PL11181544T patent/PL2433720T3/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607505A (en) * | 2015-01-21 | 2015-05-13 | 上海理工大学 | Veneer reeling machine |
| CN104607505B (en) * | 2015-01-21 | 2016-05-25 | 上海理工大学 | Veneer reeling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010041296A1 (en) | 2012-03-29 |
| EP2433720A1 (en) | 2012-03-28 |
| PL2433720T3 (en) | 2014-04-30 |
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