EP1958712B1 - Press - Google Patents
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- Publication number
- EP1958712B1 EP1958712B1 EP08002237A EP08002237A EP1958712B1 EP 1958712 B1 EP1958712 B1 EP 1958712B1 EP 08002237 A EP08002237 A EP 08002237A EP 08002237 A EP08002237 A EP 08002237A EP 1958712 B1 EP1958712 B1 EP 1958712B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- tool carriers
- actuators
- press table
- sheet
- 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.)
- Active
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- 239000000969 carrier Substances 0.000 claims abstract description 30
- 238000005452 bending Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 description 23
- 238000000429 assembly Methods 0.000 description 23
- 239000002184 metal Substances 0.000 description 12
- 238000003825 pressing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
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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
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
-
- 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
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49364—Tube joined to flat sheet longitudinally, i.e., tube sheet
Definitions
- the invention relates to a (hydraulic) press for bending sheet metal edges, in particular of longitudinal edges of sheets or the like in the course of the production of pipes or the like hollow profiles.
- - Tubes means in particular longitudinal seam tubes or longitudinally welded tubes, which are formed from (metal) sheets in several stages and then welded along a longitudinal seam to the tube.
- the sheet is pre-bent or bent in the region of the (two) longitudinal edges.
- the bending radius corresponds to z. B. approximately the diameter of the tube to be produced.
- Press means in the context of the invention in particular a hydraulic press for bending sheet metal in such a (first) forming stage.
- the sheets prepared in this way are then usually bent in a second stage in a so-called U-press to a U-shape.
- the U-profile is formed in a so-called O-press in a further operation to a round tube or slot tube.
- the welding of the longitudinal seam can follow from inside and / or from outside.
- the bending of the sheet longitudinal edges in the first forming stage represents an important step in the process of pipe production, so that optimization of this step leads to an optimization of the pipe production.
- a certain press for bending press the two sheet longitudinal edges are each assigned an upper tool and a lower tool, wherein the upper tool may have a convex and the lower tool has a concave shape or vice versa.
- sheets of different widths are usually processed.
- the entire C frame presses are usually moved (cf. DE 23 52 573 and DE 24 55 596 ).
- the extent known plants are z. B. can be improved in terms of stability. - This is where the invention starts.
- the invention has for its object to provide a press for bending sheet metal edges of the type described above, which can be adapted to different conditions with a stable and compact design in a simple and functional way.
- the invention is initially based on the recognition that the pressing forces occurring in the course of forming can be particularly well absorbed when working with closed press frame, so that consequently a frame at the same time receives the pressing forces that arise in the region of both longitudinal edges.
- This is particularly advantageous when forming sheets of relatively large thickness to produce pipes of large thickness.
- the frame construction succeeds in a simple way an adaptation of the press to different conditions and in particular different sheet widths and different bending radii.
- the tool carrier and thus also attached to the tool carrier tools are adjustable within the press frame and therefore freely positioned. Such a positioning succeeds in the sense of a remote adjustment, so that no elaborate manual adjustments are required. Rather, the Tool carrier or the tool carrier can be positioned by external control in the desired manner.
- the actuators may be connected to one or more suitable control and / or regulating devices.
- suitable control and / or regulating devices Of particular importance is that within the scope of the invention, with the actuators associated with the tool carriers not only a positioning, but also a locking succeeds. It is therefore not necessary to mechanically lock the positioned tool carrier, for. B. clamp. Rather, z. B. in hydraulic cylinder piston assemblies as actuators positioning and hydraulic locking via the cylinder piston arrangements themselves. The cylinder piston assemblies are thus hydraulically locked. These are preferably NC-controlled hydraulic cylinder piston arrangements. The positioning of the tools can be even during the initiation of the pressing forces on the press cylinder in the order of z. B. 1/10 mm constant, without a mechanical lock is required. With the help of actuators, z.
- the actuator cylinder piston assemblies may be configured as double-acting (differential) cylinder piston assemblies.
- the actuators (at least one end) are supported on the upper and lower press table. If the actuators are designed as cylinder piston assemblies, it is within the scope of the invention, the possibility of the piston or the piston rod of the cylinder piston assemblies firmly or fixed to the upper or lower press table to connect, and the tool carrier fixed to the cylinder or
- the upper and / or lower press table have at least one (central) support bracket, on which the or the actuators are supported or held.
- the invention is based on the finding that two upper tool carriers and two lower tool carriers are provided for the simultaneous processing of both sheet edges, wherein preferably each tool carrier is assigned its own cylinder piston arrangement or several separate cylinder piston arrangements. The two tool carriers for the two sheet metal edges are then arranged on both sides of the central support bracket.
- the cylinder piston assemblies can work transversely from both sides on the support block or trestles.
- each have a piston rod of the associated cylinder piston assembly may be connected.
- This has the advantage that in the course of the bending of the two sheet edges introduced during the pressing in the tool carrier forces are taken up centrally of the support block and there are substantially compensated.
- the invention is based on the recognition that the forces introduced essentially vertically into the sheet metal edges in the course of forming are diverted to a considerable extent into horizontal forces or transverse forces by the contour of the tools. These forces arising in the region of the two sheet metal edges are opposite, so that they are - when they are introduced in the common support block - compensated by and large. In the context of the invention is thus prevented that high forces must be absorbed by the frame and in particular by the vertical frame members or columns.
- the pistons are arranged stationarily on the press frame, for. B. on their piston rods on the press frame, z. B. a central support bracket, are supported.
- the piston rods are formed as tubular or hollow piston rods, which are penetrated by at least one tie rod. If, for example, the two cylinder arrangements associated piston rods are arranged on both sides of the central support bracket, it is expedient if the piston and piston rods are clamped by means of the piston rods sweeping drawbars against the support frame, the tie rods are attached to the piston.
- the two tubular piston rods arranged on both sides of a support bracket can be penetrated by a single common pull rod, which is fastened to the end of the piston and with which the two pistons and tubular rods are braced against the central support bracket and against each other.
- the support bracket may have an opening through which the central pull rod is passed.
- the cylinder piston assemblies are preferably designed as double-acting cylinder piston assemblies, so that each individual tool carrier is independently adjustable. It is understood that a tool or z. B. on the press base of a sheet metal side associated cylinder piston assemblies are preferably operated synchronously.
- the invention proposes that one or more cylinder piston assemblies, preferably each cylinder piston assembly, a displacement measuring system is assigned, which determines the position of the piston within the cylinder housing. This may be, for example, a measuring spindle associated with the piston or the piston rod.
- the sheets to be machined are fixed within the press during processing.
- one or more sheet holding devices may be provided.
- the invention includes not only embodiments with hydraulic actuators for the tool carrier, but also those in which the actuators are designed as spindle drives, wherein the spindle can usually be driven by an electric motor.
- a hydraulic bending press or forming press for bending sheet metal edges is shown.
- Such a press is part of a plant for producing longitudinally welded pipes.
- the thus prepared bent sheets are then usually formed in a U-press and then in an O-press and then welded into tubes. This processing of the bent sheets is not shown in detail.
- the press according to the invention has a press frame 3 which consists of several press frames 2. Furthermore, the press has an upper press table 4 and a lower press table 5, wherein on the upper press table 4 or the lower press table 5, several forming cylinder piston assemblies 6 work, which are supported on the press frame 2.
- Fig. 1 and 2 show a press according to the invention in the embodiment of an upper piston press with fixed lower press table 5 and up and lowerable upper press table 4.
- the upper press table 4 are assigned two upper tool carrier 7a, 7b for two upper tools 17.
- the lower press table 5 is associated with two lower tool carriers 8a, 8b for two lower tools 18.
- both longitudinal edges of a sheet 1 wherein the tool carrier 7a and 8a of a longitudinal edge (in the Fig. 1 the left longitudinal edge) and the tool carrier 7b, 8b of the other longitudinal edge (in the Fig. 1 are assigned to the right longitudinal edge.
- the upper tools 17 in the embodiment a convex and the lower tools 18 in the embodiment a concave shape.
- the press frame 2 are formed as a closed press frame.
- Fig. 1 shows a preferred embodiment in which the closed press frame are formed by frame plates. These can each be formed integrally or in several pieces from upper cross plate 2a and lower cross plate 2b and two lateral sheet metal legs 2c.
- the horizontal position of all tool carrier is adjustable transversely to the horizontal press longitudinal direction L and consequently in the horizontal press transverse direction by means of a plurality of actuators 9a, 9b, 10a, 10b.
- the tool carriers are consequently positioned or adjusted within the scope of the invention within the press frame or relative to the press frame 2 and also relative to the press tables 4, 5.
- the actuators 9a, 9b, 10a, 10b according to the invention are provided.
- the actuators are designed as hydraulic cylinder piston assemblies which operate in the press transverse direction and also in the horizontal plane or parallel to the sheet plane.
- the hydraulic cylinder piston arrangements 9a, 9b, 10a, 10b not only a positioning of the tool carriers 7a, 7b, 8a, 8b but at the same time a locking or fixing can take place without mechanical aids.
- the tool carriers 7a, 7b, 8a, 8b are moved by means of the hydraulic cylinder piston arrangements 9a, 9b, 10a, 10b.
- the cylinder piston assemblies 9a, 9b, 10a, 10b are supported on the upper or lower press table 4, 5 or are held on this.
- the upper and lower press table each have a central support block 14 or more central support blocks, so that upper Press table 4 and lower press table 5 in the embodiment in cross-section substantially T-shaped or partially T-shaped.
- the support frame is an integral part of the respective press table 4, 5 or as a separately manufactured component connected to this fixed.
- the cylinder piston assemblies are now based in the region of this support bracket 14 on the respective press table 4, 5 from. Of particular importance is that the cylinder piston assemblies with their pistons 11 and / or the piston rod 11a are firmly connected to the respective press table 4, 5 or to the support block 14.
- the tool carriers 7a, 7b, 8a, 8b are fixedly connected to the cylinder housing 12 of the cylinder piston assemblies 9a, 9b, 10a, 10b.
- the cylinder housing 12 with the attached tool carriers 7a, 7b and 8a, 8b relative to the fixed piston rod 11a process are fixedly connected to the cylinder housing 12 of the cylinder piston assemblies 9a, 9b, 10a, 10b.
- Fig. 1 are in several respects various functional positions indicated.
- the left-hand cylinder piston arrangements 9a, 10a show the tool carriers in the maximum inwardly driven position
- the right-hand cylinder piston arrangements 9b, 10b show a functional position with tool carriers moved outwards to the outside.
- the sectional representation suggests Fig. 1 in the left half of the vertically operating press cylinder 6 with the press closed and in the right half with the press open in order to represent different functional positions clearly in a drawing can. This applies equally to Fig. 3 ,
- a sheet holding device 15 may be provided for fixing the sheet 1 within the press.
- This can also be formed by (hydraulic) cylinder piston arrangements. It is possible to fix the sheet from above and from below, each with a cylinder piston arrangement. Such an embodiment is not shown. In Fig. 1 Rather, only lower cylinder piston assemblies 15 are provided which lock the sheet in the course of fixing against an opposite stop 16 on the upper tool carrier.
- cylinder piston arrangements 9a, 9b, 10a, 10b are assigned as positioning cylinders to the tool carriers 7a, 7b, 8a, 8b passing through in the longitudinal direction L of the press.
- the number of these cylinder piston arrangements can be varied and adapted to the circumstances.
- Fig. 3 and 4 illustrated embodiment corresponds in its basic structure of the embodiment according to Fig. 1 and 2 , In turn, different functional positions of the right and left press side are arranged.
- the press is open.
- the actuators are also designed as a cylinder piston arrangements, wherein here too the piston rods 11a and 11 pistons are fixedly fixed to the press table 4 and 5, while the cylinder housing 12 are moved for positioning of the tools.
- the piston rods 11a are now formed as tubular or hollow piston rods 11a, which are penetrated by a pull rod 11b. This is in particular on Fig. 3 directed.
- Piston 11 and piston rod 11a are each made as separate components.
- Fig. 3 it can be seen that the z. B.
- a Wegmesssystem 21 is associated.
- This is equipped in the embodiment with a measuring spindle or designed as a measuring spindle, which passes through the cylinder in the cylinder longitudinal direction, so determined by means of this measuring spindle, the relative position between the cylinder housing and piston and in this way the positioning of the tool is made or can be monitored ,
- FIG. 5 and 6 Another embodiment of the invention is in the Fig. 5 and 6 shown.
- This press is also designed as a frame press.
- the frame 2 are composed of upper press bar 2a, lower press bar 2b and lateral legs 2c, which are braced by tie rods 2d or columns.
- this embodiment is designed as an underpressure press, ie only the lower press table 5 can be moved by means of the cylinder 6.
- the actuators 9a, 9b, 10a, 10b are not designed as hydraulic cylinder piston assemblies, but as spindle drives.
- the upper press table 4 and the lower press table 5 each have at least one central support block 14, on which the spindle drives are connected with their spindles 13 at the end.
- the spindles (rotatably) mounted on the press tables 4, 5 are driven in a rotating manner manually or by a motor (eg by an electric motor) so that the tool carriers 7a, 7b, 8a, 8b are displaced along the spindles.
- a motor eg by an electric motor
- the embodiment according to Fig. 1 and 2 respectively.
- the training as a top or bottom piston press is variable.
- Fig. 1 to 6 show preferred embodiments of the invention, in which the position of the upper and lower tool carrier is adjusted transversely to the press longitudinal direction by means of actuators.
- Fig. 7 shows a (simplified) modified embodiment of the invention, in which the position of the tool carrier is also adjustable, but without the use of appropriate actuators.
- Fig. 7 shows only the lower press table 5 of such a press, the presses according to their basic structure Fig. 1 to 6 can correspond. It is in Fig. 7 recognizable that is dispensed with actuators. Instead, the tool carriers 8a, 8b (freely) on support surfaces 19 are displaced to adjust a desired position. Subsequently, a locking of the adjusted position by the use of one or more spacer elements or spacers 20 which lock the position and the tool carrier 8a and 8b are supported on the press table 5 then takes place. Also in this embodiment, a central support block 14 is provided.
- the press table 4 similar to the embodiment according to Fig. 5 - formed substantially M-shaped or W-shaped.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Press Drives And Press Lines (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Die Erfindung betrifft eine (hydraulische) Presse zum Anbiegen von Blechkanten, insbesondere von Längskanten von Blechen oder dergleichen im Zuge der Herstellung von Rohren oder dergleichen Hohlprofilen. - Rohre meint insbesondere Längsnahtrohre bzw. längsnahtgeschweißte Rohre, welche aus (Metall-) Blechen in mehreren Stufen geformt und anschließend entlang einer Längsnaht zu dem Rohr verschweißt werden. Um derartige Rohre aus zunächst ebenen Blechen herzustellen, wird üblicherweise in einer ersten Umformungsstufe das Blech im Bereich der (beiden) Längskanten vorgebogen bzw. angebogen. Der Biegeradius entspricht dabei z. B. in etwa dem Durchmesser des herzustellenden Rohres. Presse meint im Rahmen der Erfindung insbesondere eine hydraulische Presse zum Anbiegen von Blechen in einer solchen (ersten) Umformungsstufe. Die derart vorbereiteten Bleche werden dann in der Regel in einer zweiten Stufe in einer sogenannten U-Presse zu einer U-Form gebogen. In der dritten Umformungsstufe wird das U-Profil in einer sogenannten O-Presse in einem weiteren Arbeitsgang zu einem runden Rohr bzw. Schlitzrohr geformt. Anschließend kann dann nach ggf. weiteren Verarbeitungsschritten das Schweißen der Längsnaht von innen und/oder von außen folgen.The invention relates to a (hydraulic) press for bending sheet metal edges, in particular of longitudinal edges of sheets or the like in the course of the production of pipes or the like hollow profiles. - Tubes means in particular longitudinal seam tubes or longitudinally welded tubes, which are formed from (metal) sheets in several stages and then welded along a longitudinal seam to the tube. To produce such tubes from initially flat sheets, usually in a first forming stage, the sheet is pre-bent or bent in the region of the (two) longitudinal edges. The bending radius corresponds to z. B. approximately the diameter of the tube to be produced. Press means in the context of the invention in particular a hydraulic press for bending sheet metal in such a (first) forming stage. The sheets prepared in this way are then usually bent in a second stage in a so-called U-press to a U-shape. In the third deformation stage, the U-profile is formed in a so-called O-press in a further operation to a round tube or slot tube. Subsequently, after further processing steps, if appropriate, the welding of the longitudinal seam can follow from inside and / or from outside.
Das Anbiegen der Blechlängskanten in der ersten Umformungsstufe stellt einen wichtigen Verfahrensschritt im Zuge der Rohrherstellung dar, so dass Optimierung dieses Schrittes zu einer Optimierung der Rohrherstellung führt. In einer für das Anbiegen bestimmten Presse sind den beiden Blechlängskanten jeweils ein Oberwerkzeug und ein Unterwerkzeug zugeordnet, wobei das Oberwerkzeug eine konvexe und das Unterwerkzeug eine konkave Form aufweisen kann oder umgekehrt. Um Rohre mit verschiedenem Durchmesser herzustellen, werden üblicherweise Bleche mit verschiedener Breite verarbeitet. Um eine Presse an unterschiedliche Blechbreiten anpassen zu können, ist es bekannt, jeder der beiden Blechkanten eine eigene Presse zuzuordnen, die als C-Gestellpresse ausgebildet ist. Zur Anpassung werden üblicherweise die gesamten C-Gestellpressen verfahren (vgl. z. B.
Der Erfindung liegt die Aufgabe zugrunde, eine Presse zum Anbiegen von Blechkanten der eingangs beschriebenen Art zu schaffen, welche sich bei stabilem und kompaktem Aufbau in einfacher und funktionsgerechter Weise an verschiedene Gegebenheiten anpassen lässt.The invention has for its object to provide a press for bending sheet metal edges of the type described above, which can be adapted to different conditions with a stable and compact design in a simple and functional way.
Zur Lösung dieser Aufgabe lehrt die Erfindung eine Presse zum Anbiegen von Blechkanten, insbesondere von Längskanten von Blechen im Zuge der Herstellung von Rohren oder dergleichen, mit zumindest
- einem aus einem oder mehreren geschlossenen Pressenrahmen bestehenden Pressengestell,
- einem oberen Pressentisch und einem unteren Pressentisch, wobei auf den oberen und/oder unteren Pressentisch eine oder mehrere Umform-Zylinderkolbenanordnungen arbeiten, welche an den Pressenrahmen abgestützt sind,
- einem oder mehreren oberen Werkzeugträgern für ein oder mehrere Oberwerkzeuge und einem oder mehreren unteren Werkzeugträgern für ein oder mehrere Unterwerkzeuge,
- a press frame consisting of one or more closed press frames,
- an upper press table and a lower press table, wherein on the upper and / or lower press table, one or more Umform-Zylinderkolbenanordnungen work, which are supported on the press frame,
- one or more upper tool carriers for one or more upper tools and one or more lower tool carriers for one or more lower tools,
Die Erfindung geht zunächst einmal von der Erkenntnis aus, dass die im Zuge der Umformung auftretenden Presskräfte besonders gut aufgenommen werden können, wenn mit geschlossenen Pressenrahmen gearbeitet wird, so dass folglich ein Rahmen zugleich die Presskräfte aufnimmt, die im Bereich beider Längskanten entstehen. Dieses ist insbesondere dann vorteilhaft, wenn Bleche mit verhältnismäßig großer Dicke umgeformt werden, um Rohre großer Dicke herzustellen. Trotz der Rahmenbauweise gelingt auf einfache Weise eine Anpassung der Presse an verschiedene Gegebenheiten und insbesondere verschiedene Blechbreiten und verschiedene Biegeradien. Denn die Werkzeugträger und damit auch die an den Werkzeugträger befestigten Werkzeuge sind innerhalb der Pressenrahmen verstellbar und folglich frei positionierbar. Eine derartige Positionierung gelingt im Sinne einer Fernverstellung, so dass keine aufwendigen manuellen Anpassungen erforderlich sind. Vielmehr kann der Werkzeugträger bzw. können die Werkzeugträger durch externe Ansteuerung in der gewünschten Weise positioniert werden. Dazu können die Stellantriebe mit einer oder mehreren geeigneten Steuer- und/oder Regeleinrichtungen verbunden sein. Von besonderer Bedeutung ist, dass im Rahmen der Erfindung mit den den Werkzeugträgern zugeordneten Stellantrieben nicht nur eine Positionierung, sondern darüber hinaus auch eine Arretierung gelingt. Es ist folglich nicht erforderlich, die positionierten Werkzeugträger mechanisch zu arretieren, z. B. festzuklemmen. Vielmehr kann z. B. bei hydraulischen Zylinderkolbenanordnungen als Stellantriebe eine Positionierung und hydraulische Arretierung über die Zylinderkolbenanordnungen selbst erfolgen. Die Zylinderkolbenanordnungen werden folglich hydraulisch verriegelt. Dabei handelt es sich vorzugsweise um NC-gesteuerte hydraulische Zylinderkolbenanordnungen. Die Positionierung der Werkzeuge lässt sich dabei selbst während der Einleitung der Presskräfte über die Presszylinder in einer Größenordnung von z. B. 1/10 mm konstant halten, ohne dass eine mechanische Verriegelung erforderlich ist. Mit Hilfe der Stellantriebe, z. B. hydraulischen Zylinderkolbenanordnungen, gelingt aber nicht nur eine Positionierung und anschließend Arretierung der Werkzeugträger, sondern es besteht im Rahmen der Erfindung auch die Möglichkeit, einen oder mehrere Werkzeugträger während des Pressvorgangs in Querrichtung zu verschieben. Damit gelingt eine einwandfreie Anpassung des Pressvorgangs an verschiedenste Gegebenheiten. Die Stell-Zylinderkolbenanordnungen können als doppelt wirkende (Differential-) Zylinderkolbenanordnungen ausgebildet sein.The invention is initially based on the recognition that the pressing forces occurring in the course of forming can be particularly well absorbed when working with closed press frame, so that consequently a frame at the same time receives the pressing forces that arise in the region of both longitudinal edges. This is particularly advantageous when forming sheets of relatively large thickness to produce pipes of large thickness. Despite the frame construction succeeds in a simple way an adaptation of the press to different conditions and in particular different sheet widths and different bending radii. Because the tool carrier and thus also attached to the tool carrier tools are adjustable within the press frame and therefore freely positioned. Such a positioning succeeds in the sense of a remote adjustment, so that no elaborate manual adjustments are required. Rather, the Tool carrier or the tool carrier can be positioned by external control in the desired manner. For this purpose, the actuators may be connected to one or more suitable control and / or regulating devices. Of particular importance is that within the scope of the invention, with the actuators associated with the tool carriers not only a positioning, but also a locking succeeds. It is therefore not necessary to mechanically lock the positioned tool carrier, for. B. clamp. Rather, z. B. in hydraulic cylinder piston assemblies as actuators positioning and hydraulic locking via the cylinder piston arrangements themselves. The cylinder piston assemblies are thus hydraulically locked. These are preferably NC-controlled hydraulic cylinder piston arrangements. The positioning of the tools can be even during the initiation of the pressing forces on the press cylinder in the order of z. B. 1/10 mm constant, without a mechanical lock is required. With the help of actuators, z. As hydraulic cylinder piston assemblies, but not only succeeds positioning and then locking the tool carrier, but it is within the scope of the invention also has the ability to move one or more tool carrier during the pressing operation in the transverse direction. This manages a perfect adaptation of the pressing process to a variety of conditions. The actuator cylinder piston assemblies may be configured as double-acting (differential) cylinder piston assemblies.
Nach bevorzugter Ausführungsform sind die Stellantriebe (zumindest mit einem Ende) an dem oberen bzw. unteren Pressentisch abgestützt. Sofern die Stellantriebe als Zylinderkolbenanordnungen ausgebildet sind, besteht im Rahmen der Erfindung die Möglichkeit, den Kolben bzw. die Kolbenstange der Zylinderkolbenanordnungen fest bzw. ortsfest an den oberen bzw. unteren Pressentisch anzuschließen, und den Werkzeugträger fest mit dem Zylinder bzw.According to a preferred embodiment, the actuators (at least one end) are supported on the upper and lower press table. If the actuators are designed as cylinder piston assemblies, it is within the scope of the invention, the possibility of the piston or the piston rod of the cylinder piston assemblies firmly or fixed to the upper or lower press table to connect, and the tool carrier fixed to the cylinder or
Zylindergehäuse zu verbinden, so dass im Zuge der Positionierung das Zylindergehäuse mit dem Werkzeugträger verfahren wird, während der Kolben bzw. die Kolbenstange relativ zum Pressengestell ortsfest bleiben. In diesem Zusammenhang ist es besonders zweckmäßig, wenn der obere und/oder untere Pressentisch zumindest einen (zentralen) Stützbock aufweisen, an welchem der bzw. die Stellantriebe abgestützt bzw. gehalten sind. Dabei geht die Erfindung von der Erkenntnis aus, dass zur gleichzeitigen Bearbeitung beider Blechkanten zwei obere Werkzeugträger und zwei untere Werkzeugträger vorgesehen sind, wobei vorzugsweise jedem Werkzeugträger eine eigene Zylinderkolbenanordnung oder mehrere eigene Zylinderkolbenanordnungen zugeordnet sind. Die beiden Werkzeugträger für die beiden Blechkanten sind dann beidseitig des zentralen Stützbocks angeordnet. So können die Zylinderkolbenanordnungen in Querrichtung von beiden Seiten auf den Stützbock oder die Stützböcke arbeiten. Folglich können beidseitig an den Stützbock jeweils eine Kolbenstange der zugeordneten Zylinderkolbenanordnung angeschlossen sein. Dieses hat den Vorteil, dass im Zuge des Anbiegens der beiden Blechkanten die im Zuge des Pressens in den Werkzeugträger eingeleiteten Kräfte zentral von dem Stützbock aufgenommen werden und dort im Wesentlichen kompensiert werden. Dabei geht die Erfindung von der Erkenntnis aus, dass die im Zuge des Umformens im Wesentlichen vertikal in die Blechkanten eingeleiteten Kräfte durch die Kontur der Werkzeuge in erheblichem Maße in Horizontalkräfte bzw. Querkräfte umgeleitet werden. Diese im Bereich der beiden Blechkanten entstehenden Kräfte sind entgegengesetzt, so dass sie - wenn sie in dem gemeinsamen Stützbock eingeleitet werden - im Großen und Ganzen kompensiert werden. Im Rahmen der Erfindung wird folglich verhindert, dass hohe Kräfte von den Rahmen und insbesondere von den vertikalen Rahmenteilen bzw. Säulen aufgenommen werden müssen. Insofern wird eine besonders stabile Bauweise gewährleistet. Umgekehrt kann zur Erzielung bestimmter Presskräfte eine besonders kompakte Bauweise gewählt werden, da durch die Kraftkompensation das Pressengestell sehr kompakt aufgebaut sein kann. Damit besteht die Möglichkeit, bereits im Zuge des Anbiegens große Bereiche des Bleches vorzuformen, so dass sich mit der erfindungsgemäßen Presse auch die nachfolgenden Verfahrensschritte optimieren lassen.To connect cylinder housing, so that in the course of positioning the cylinder housing is moved with the tool carrier, while the piston or the piston rod remain stationary relative to the press frame. In this context, it is particularly expedient if the upper and / or lower press table have at least one (central) support bracket, on which the or the actuators are supported or held. The invention is based on the finding that two upper tool carriers and two lower tool carriers are provided for the simultaneous processing of both sheet edges, wherein preferably each tool carrier is assigned its own cylinder piston arrangement or several separate cylinder piston arrangements. The two tool carriers for the two sheet metal edges are then arranged on both sides of the central support bracket. Thus, the cylinder piston assemblies can work transversely from both sides on the support block or trestles. Consequently, on both sides of the support bracket each have a piston rod of the associated cylinder piston assembly may be connected. This has the advantage that in the course of the bending of the two sheet edges introduced during the pressing in the tool carrier forces are taken up centrally of the support block and there are substantially compensated. The invention is based on the recognition that the forces introduced essentially vertically into the sheet metal edges in the course of forming are diverted to a considerable extent into horizontal forces or transverse forces by the contour of the tools. These forces arising in the region of the two sheet metal edges are opposite, so that they are - when they are introduced in the common support block - compensated by and large. In the context of the invention is thus prevented that high forces must be absorbed by the frame and in particular by the vertical frame members or columns. In this respect, a particularly stable construction is ensured. Conversely, to achieve certain compressive forces a particularly compact design can be chosen because of the Force compensation the press frame can be constructed very compact. This makes it possible to preform large areas of the sheet already in the course of bending so that the subsequent method steps can also be optimized with the press according to the invention.
Es wurde bereits erläutert, dass es im Rahmen der Erfindung zweckmäßig ist, dass die Kolben ortsfest am Pressengestell angeordnet sind, z. B. über ihre Kolbenstangen am Pressengestell, z. B. einem zentralen Stützbock, abgestützt sind. Dazu kann es im Rahmen einer abgewandelten Ausführungsform der Erfindung zweckmäßig sein, wenn die Kolbenstangen als rohrförmige oder hohle Kolbenstangen ausgebildet sind, welche von zumindest einer Zugstange durchgriffen werden. Sofern beispielsweise die den beiden Zylinderanordnungen zugeordneten Kolbenstangen beidseitig des zentralen Stützbockes angeordnet sind, ist es zweckmäßig, wenn die Kolben und Kolbenstangen mittels der die Kolbenstangen durchgreifenden Zugstangen gegen den Stützbock verspannt sind, wobei die Zugstangen an dem Kolben befestigt werden. In einer bevorzugten Ausführungsform können dabei die beiden beidseitig eines Stützbockes angeordneten rohrförmigen Kolbenstangen von einer einzigen gemeinsamen Zugstange durchgriffen werden, welche endseitig an den Kolben befestigt ist und mit welcher die beiden Kolben und rohrförmigen Kolbestangen gegen den zentralen Stützbock und auch gegeneinander verspannt werden. Dazu kann auch der Stützbock eine Durchbrechung aufweisen, durch welche die zentrale Zugstange hindurchgeführt ist.It has already been explained that it is expedient in the context of the invention that the pistons are arranged stationarily on the press frame, for. B. on their piston rods on the press frame, z. B. a central support bracket, are supported. For this purpose, it may be useful in the context of a modified embodiment of the invention, when the piston rods are formed as tubular or hollow piston rods, which are penetrated by at least one tie rod. If, for example, the two cylinder arrangements associated piston rods are arranged on both sides of the central support bracket, it is expedient if the piston and piston rods are clamped by means of the piston rods sweeping drawbars against the support frame, the tie rods are attached to the piston. In a preferred embodiment, the two tubular piston rods arranged on both sides of a support bracket can be penetrated by a single common pull rod, which is fastened to the end of the piston and with which the two pistons and tubular rods are braced against the central support bracket and against each other. For this purpose, the support bracket may have an opening through which the central pull rod is passed.
Die Zylinderkolbenanordnungen sind vorzugsweise als doppelt wirkende Zylinderkolbenanordnungen ausgebildet, so dass jeder einzelne Werkzeugträger unabhängig voneinander verstellbar ist. Es versteht sich, dass die einem Werkzeug bzw. z. B. am Pressenunterteil einer Blechseite zugeordneten Zylinderkolbenanordnungen vorzugsweise synchron betätigt werden.The cylinder piston assemblies are preferably designed as double-acting cylinder piston assemblies, so that each individual tool carrier is independently adjustable. It is understood that a tool or z. B. on the press base of a sheet metal side associated cylinder piston assemblies are preferably operated synchronously.
Ferner schlägt die Erfindung vor, dass einer oder mehrere Zylinderkolbenanordnungen, vorzugsweise jeder Zylinderkolbenanordnung ein Wegmesssystem zugeordnet ist, welches die Position des Kolbens innerhalb des Zylindergehäuses bestimmt. Dabei kann es sich beispielsweise um eine dem Kolben bzw. der Kolbenstange zugeordnete Messspindel handeln.Furthermore, the invention proposes that one or more cylinder piston assemblies, preferably each cylinder piston assembly, a displacement measuring system is assigned, which determines the position of the piston within the cylinder housing. This may be, for example, a measuring spindle associated with the piston or the piston rod.
Im Übrigen ist es zweckmäßig, wenn die zu bearbeitenden Bleche innerhalb der Presse während der Bearbeitung fixiert werden. Dazu können ein oder mehrere Blechhalteeinrichtungen vorgesehen sein.Incidentally, it is expedient if the sheets to be machined are fixed within the press during processing. For this purpose, one or more sheet holding devices may be provided.
Ferner umfasst die Erfindung nicht nur Ausführungsformen mit hydraulischen Stellantrieben für die Werkzeugträger, sondern auch solche, bei denen die Stellantriebe als Spindelantriebe ausgebildet sind, wobei die Spindel üblicherweise elektromotorisch angetrieben werden kann.Furthermore, the invention includes not only embodiments with hydraulic actuators for the tool carrier, but also those in which the actuators are designed as spindle drives, wherein the spindle can usually be driven by an electric motor.
Im Folgenden wird die Erfindung anhand von lediglich Ausführungsbeispiele darstellenden Zeichnungen näher erläutert. Es zeigen
- Fig. 1
- eine bevorzugte Ausführungsform der Erfindung in einem Querschnitt,
- Fig. 2
- eine Seitenansicht des Gegenstandes nach
Fig. 1 (teilweise geschnitten), - Fig. 3
- eine abgewandelte Ausführungsform des Gegenstandes nach
Fig. 1 - Fig. 4
- eine vereinfachte Draufsicht auf den Gegenstand nach
Fig. 3 - Fig. 5
- eine weitere Ausführungsform der Erfindung teilweise im Querschnitt,
- Fig. 6
- eine Seitenansicht auf den Gegenstand nach
Fig. 5 und - Fig. 7
- einen Ausschnitt aus einer abgewandelten Ausführungsform der Erfindung.
- Fig. 1
- a preferred embodiment of the invention in a cross section,
- Fig. 2
- a side view of the object
Fig. 1 (partially cut), - Fig. 3
- a modified embodiment of the article according to
Fig. 1 - Fig. 4
- a simplified plan view of the object after
Fig. 3 - Fig. 5
- a further embodiment of the invention partially in cross section,
- Fig. 6
- a side view of the object
Fig. 5 and - Fig. 7
- a section of a modified embodiment of the invention.
In den Figuren ist eine hydraulische Biegepresse bzw. Umformpresse zum Anbiegen von Blechkanten dargestellt. Eine solche Presse ist Teil einer Anlage zum Herstellen von längsnahtgeschweißten Rohren. In der erfindungsgemäßen Presse erfolgt das Anbiegen der Längskanten von Blechen 1. Die derart vorbereiteten angebogenen Bleche werden anschließend üblicherweise in einer U-Presse und daraufhin in einer O-Presse umgeformt und anschließend zu Rohren verschweißt. Diese Weiterverarbeitung der angebogenen Bleche ist nicht im Detail dargestellt.In the figures, a hydraulic bending press or forming press for bending sheet metal edges is shown. Such a press is part of a plant for producing longitudinally welded pipes. In the press according to the invention, the bending of the longitudinal edges of
Die erfindungsgemäße Presse weist ein Pressengestell 3 auf, welches aus mehreren Pressenrahmen 2 besteht. Ferner weist die Presse einen oberen Pressentisch 4 und einen unteren Pressentisch 5 auf, wobei auf den oberen Pressentisch 4 oder den unteren Pressentisch 5 mehrere Umform-Zylinderkolbenanordnungen 6 arbeiten, welche an den Pressenrahmen 2 abgestützt sind.
Die Pressenrahmen 2 sind als geschlossene Pressenrahmen ausgebildet.
In den beiden Ausführungsbeispielen nach den
Die Zylinderkolbenanordnungen 9a, 9b, 10a, 10b stützen sich dabei an dem oberen bzw. unteren Pressentisch 4, 5 ab bzw. sind an diesem gehalten. Dazu weisen der obere und der untere Pressentisch jeweils einen zentralen Stützbock 14 oder mehrere zentrale Stützböcke auf, so dass oberer Pressentisch 4 und unterer Pressentisch 5 im Ausführungsbeispiel im Querschnitt im Wesentlichen T-förmig oder bereichsweise T-förmig ausgebildet sind. Der Stützbock ist integraler Bestandteil des jeweiligen Pressentisches 4, 5 oder auch als separat gefertigtes Bauteil an diesen fest angeschlossen. Die Zylinderkolbenanordnungen stützen sich nun im Bereich dieses Stützbockes 14 an dem jeweiligen Pressentisch 4, 5 ab. Von besonderer Bedeutung ist dabei, dass die Zylinderkolbenanordnungen mit ihren Kolben 11 und/oder der Kolbenstange 11a fest an den jeweiligen Pressentisch 4, 5 bzw. an den Stützbock 14 angeschlossen sind. Die Werkzeugträger 7a, 7b, 8a, 8b sind fest an die Zylindergehäuse 12 der Zylinderkolbenanordnungen 9a, 9b, 10a, 10b angeschlossen. Damit werden im Zuge der Ansteuerung der Zylinderkolbenanordnungen die Zylindergehäuse 12 mit den daran befestigten Werkzeugträgern 7a, 7b bzw. 8a, 8b relativ zu der fest angeordneten Kolbenstange 11a verfahren.The
In der
Es ist nun in
Im Übrigen ist in
Im Übrigen ist in
Das in den
Im Übrigen ist in
Eine weitere Ausführungsform der Erfindung ist in den
Die
Claims (11)
- Press for bending sheet edges, particularly longitudinal edges of sheets (1) in the course of the production of pipes or the like, with at least- one press framework (3) consisting of one or a plurality of closed press frames (2),- one upper press table (4) and one lower press table (5), wherein one or a plurality of forming piston-cylinder arrangements (6), which are supported on the press frames (2), operate on the upper and/or lower press table (4, 5),- one or a plurality of upper tool carriers (7a, 7b) for one or a plurality of upper tools (17) and one or a plurality of lower tool carriers (8a, 8b) for one or a plurality of lower tools (18),wherein the position of the upper/lower tool carrier(s) can be set and, if appropriate, locked transversely to the press longitudinal direction (L).
- Press according to Claim 1, wherein the position of the upper/lower tool carriers (17, 18) can be set and, if appropriate, locked transversely to the press longitudinal direction (L) by means of one or a plurality of actuators (9a, 9b, 10a, 10b).
- Press according to Claim 2, wherein the actuators (9a, 9b, 10a, 10b) for the tool carriers or tools (17, 18) are constructed as e.g. hydraulic piston-cylinder arrangements and/or spindle drives.
- Press according to Claim 2 or 3, wherein the actuators (9a, 9b, 10a, 10b) are supported on the upper or lower press table (4, 5).
- Press according to Claim 3 or 4, wherein the pistons (11) or piston rods (11 a) of the actuators (9a, 9b, 10a, 10b) constructed as piston-cylinder arrangements are attached securely or fixedly to the upper or lower press table (4, 5) and wherein the tool carrier (7a, 7b, 8a, 8b) assigned to the respective actuator can be moved with the cylinder housing (12) in the course of the positioning.
- Press according to any one of the Claims 3 to 5, wherein at least one end of the spindle (13) of the actuators (9a, 9b, 10a, 10b) constructed as spindle drives is securely or rotatably attached to the upper or lower press table (4, 5) and the tool carrier can be moved in the course of the positioning on the assigned spindle or with the assigned spindle.
- Press according to any one of Claims 1 to 6, wherein the upper and/or lower press table (4, 5) has at least one (central) support block (14), on which the actuator(s) (9a, 9b, 10a, 10b) is/are supported or held.
- Press according to any one of Claims 1 to 7, wherein the upper press table (4) has two tool carriers (7a, 7b) assigned to the two sheet edges and/or the lower press table (5) has two tool carriers (8a, 8b) assigned to the two sheet edges, wherein the two tool carriers (7a, 7b or 8a, 8b) are arranged on both sides of the central support block (14) of the upper or lower press table (4, 5), so that the forces introduced into the tool carriers in the course of the forming are introduced from two opposite sides into the support block (14).
- Press according to any one of Claims 1 to 8, wherein the piston rods (11 a) are constructed (at least in some areas) as tubular or hollow piston rods through which at least one tension rod (11 b) passes.
- Press according to any one of Claims 1 to 9, wherein the two tubular piston rods (11a) and pistons (11) arranged on both sides of a support block (14) are tensioned against one another and against the central support block (14) with at least one tension rod (11b) which passes through the support block (14), preferably a tension rod (11b) which passes through the piston rods (11a).
- Press according to any one of Claims 1 to 10, wherein one or a plurality of sheet holders (15) are attached to the upper and/or lower press table (4, 5), with which sheet holders the sheet is held before and/or during and/or after the sheet forming.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710008312 DE102007008312A1 (en) | 2007-02-16 | 2007-02-16 | Press e.g. hydraulic bending press, for use during production of longitudinal seam-welded pipe, has tool carriers arranged on both sides of central support rack of tables so that forces are initiated by opposite sides of support rack |
DE202007007517U DE202007007517U1 (en) | 2007-02-16 | 2007-05-26 | Press e.g. hydraulic bending press, for use during production of longitudinal seam-welded pipe, has tool carriers arranged on both sides of central support rack of tables so that forces are initiated by opposite sides of support rack |
Publications (3)
Publication Number | Publication Date |
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EP1958712A1 EP1958712A1 (en) | 2008-08-20 |
EP1958712B1 true EP1958712B1 (en) | 2010-05-26 |
EP1958712B2 EP1958712B2 (en) | 2018-09-19 |
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DE102008048393A1 (en) * | 2008-09-22 | 2010-03-25 | Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg | Frame press, in particular one-day press |
IT1391762B1 (en) * | 2008-11-11 | 2012-01-27 | Sms Demag Innse Spa Ora Sms Innse Spa | FOLDING-EDGE PRESS |
DE102010008894A1 (en) | 2010-02-23 | 2011-08-25 | SMS Meer GmbH, 41069 | Method for bending a sheet |
CN102935728A (en) * | 2012-11-16 | 2013-02-20 | 无锡阳工机械制造有限公司 | Crossbeam structure for small and medium-size hydraulic machines |
CN113199771A (en) * | 2021-07-06 | 2021-08-03 | 山东永丰液压机械有限公司 | High-speed compression fittings of fiber reinforced plastic pipe and aluminum product |
IT202200008012A1 (en) * | 2022-04-22 | 2023-10-22 | L M C Mecc S R L | Press for bending sheet metal. |
CN117698197B (en) * | 2024-02-06 | 2024-04-19 | 大同宇林德石墨新材料股份有限公司 | Flexible graphite extrusion forming device |
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US3472053A (en) * | 1967-02-10 | 1969-10-14 | Yoder Co | Tube mill |
SU654153A3 (en) | 1973-10-17 | 1979-03-25 | Маннесманн Аг (Фирма) | Device for bending sheet edges |
DE2455596C3 (en) * | 1974-11-23 | 1978-05-03 | Mannesmann Ag, 4000 Duesseldorf | Press with convex and concave tools for bending the edges of metal sheets |
JPS6044050B2 (en) * | 1976-09-10 | 1985-10-01 | 新日本製鐵株式会社 | Multi-stage forming method for long shells |
DE2701207C2 (en) * | 1977-01-13 | 1978-11-09 | G. Siempelkamp Gmbh & Co, 4150 Krefeld | Hydraulic sheet metal bending press |
US4476703A (en) * | 1980-06-17 | 1984-10-16 | Kaiser Steel (Delaware), Inc. | Edge preforming of metal plate |
JPS6022992A (en) * | 1983-07-18 | 1985-02-05 | Kubota Ltd | Apparatus for treating filthy water |
JPS60166121A (en) * | 1984-02-10 | 1985-08-29 | Nippon Kokan Kk <Nkk> | Method and apparatus for bending end part of steel plate |
JP2003190282A (en) * | 2001-12-27 | 2003-07-08 | Terumo Corp | Metal tubular body and its manufacturing method |
DE10232098B4 (en) * | 2002-07-15 | 2004-05-06 | Sms Meer Gmbh | Device for producing pipes from sheet metal |
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