EP3858512B1 - Dispositif de pliage destiné à l'usinage par pliage d'un module de tôle - Google Patents

Dispositif de pliage destiné à l'usinage par pliage d'un module de tôle Download PDF

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Publication number
EP3858512B1
EP3858512B1 EP20213769.1A EP20213769A EP3858512B1 EP 3858512 B1 EP3858512 B1 EP 3858512B1 EP 20213769 A EP20213769 A EP 20213769A EP 3858512 B1 EP3858512 B1 EP 3858512B1
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EP
European Patent Office
Prior art keywords
hemming
setting
folding bed
base frame
hemming die
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
Application number
EP20213769.1A
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German (de)
English (en)
Other versions
EP3858512C0 (fr
EP3858512A1 (fr
Inventor
Arndt Birkert
Moritz Nowack
Markus Straub
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hochschule Heilbronn
Inigence GmbH
Original Assignee
Hochschule Heilbronn
Inigence GmbH
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Publication date
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Publication of EP3858512A1 publication Critical patent/EP3858512A1/fr
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Publication of EP3858512C0 publication Critical patent/EP3858512C0/fr
Publication of EP3858512B1 publication Critical patent/EP3858512B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/16—Folding; Pleating
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/02—Die constructions enabling assembly of the die parts in different ways
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/04—Movable or exchangeable mountings for tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards

Definitions

  • the invention relates to a folding device.
  • a folding device is, for example, from DE 10 2015 220 540 A1 known and provided for folding a sheet metal assembly of a vehicle body.
  • a linear joint at the edge between different sheet metal components of the sheet metal assembly is produced in a manner which is known in principle.
  • the known folding device has a folding bed, on the upper side of which a folding bed contour is formed, which accommodates at least one of the sheet metal components in a positioning manner.
  • the folding device also has a base frame, referred to as the base, on which the folding bed is supported.
  • More folding devices are also from the WO 2016/152968 A1 and the EP 3 479 920 A1 known.
  • the folding devices shown there each have a support device with several supports, by means of which the folding bed is supported on the base frame.
  • the supports can each be placed against the folding bed from below. This is intended to improve the support of the folding bed on the base frame.
  • the folding bed contour in the area of car body production, it is common practice for the folding bed contour to be shaped in accordance with a desired target geometry of the sheet metal component to be accommodated on it.
  • This target geometry is usually also referred to as the zero geometry.
  • Measures to improve the dimensional and shape accuracy of the sheet metal assembly usually start at the level of individual part production.
  • the drawing tools used in the production of individual parts can be geometrically adjusted using basically known methods to correct the deviations in the sheet metal components caused by springback. This is time-consuming and costly.
  • the object of the invention is to provide a hemming device of the type mentioned at the outset, which enables improved hemming of the sheet metal assembly with regard to dimensional and shape accuracy that can be achieved.
  • the solution according to the invention enables a correction of any dimensional and/or shape deviations caused by springback starting at the level of the fold processing. In this way, in particular, a time-consuming and costly correction at the level of the individual part production of the sheet metal assembly can be avoided.
  • an assembly that is intrinsically accurate in terms of dimensions and shape can be adapted to an adjacent assembly in order to obtain an improved joint quality when the assemblies are brought together. Such a procedure can be considered, for example, if it would be significantly more expensive to adapt the neighboring assembly.
  • the correction is made by adjusting the folding bed contour, which can also be referred to as a geometric change or geometric adjustment of the folding bed contour.
  • the fold bed contour can be adjusted, for example, with the aim of improving the mounting and/or positioning of the sheet metal component to its actual geometry.
  • the folding bed contour is preferably set in accordance with a setting specification that is not described in detail in the context of this application and that can be created, for example, on the basis of empirical values, measured values and/or simulation results.
  • the folding bed contour is adjusted by means of a targeted elastic and/or elastic-plastic deformation of the folding bed, with the at least one adjusting device being provided for this purpose according to the invention.
  • the folding bed is deformed under the action of the at least one adjusting element of the adjusting device, which for this purpose engages the underside of the folding bed in a force-transmitting manner and can be displaced between the different adjusting positions relative to the base frame.
  • the folding bed can be deformed as a function of the adjustment movement of the at least one adjustment element.
  • the folding bed assumes a first state of deformation, for example in a first setting position of the setting element, and assumes a second state of deformation in a second setting position of the at least one setting element.
  • the folding bed contour formed on the upper side of the folding bed changes, as a result of which the said adjustability is ultimately achieved.
  • the folding bed is preferably made of steel or cast iron.
  • the folding bed contour is formed on the upper side of the folding bed and is used for positioning the at least one sheet metal component of the sheet metal assembly.
  • the folding bed contour can in particular also be referred to as the active surface.
  • the folding bed contour In a non-deformed state of the folding bed, the folding bed contour preferably corresponds to the zero geometry of the sheet metal component to be picked up.
  • the folding bed contour is therefore preferably manufactured according to the desired zero geometry of the sheet metal component and can be geometrically adapted, ie adjusted, starting from this zero geometry.
  • the base frame is used for load-bearing support of the folding bed and the at least one adjustment device and, if necessary, other components and/or sections of the folding device.
  • the base frame can be manufactured in particular as a cast component or steel plate construction.
  • the at least one adjusting element is supported at least indirectly on the base frame and at the other end at least indirectly on the underside of the folding bed, preferably firmly attached to the same.
  • the adjusting element can be adjusted in a translatory and/or rotary manner.
  • the adjustment mobility can be provided along and/or around at least one adjustment axis.
  • the adjusting movement of the at least one adjusting element causes a tensile and/or compressive force to be applied to the folding bed, as a result of which said deformation is brought about.
  • the folding bed is pressed upwards and/or pulled downwards at least locally, namely in the area of the folding bed in which the at least one adjusting element acts.
  • different states of deformation and thus folding bed contours can be set as a result.
  • the at least one adjusting element acts on the underside of the folding bed in a manner that transmits compressive force and tensile force. Accordingly, force is not transmitted for the purpose of deforming the folding bed in just one direction of the adjustment movement. Rather, the folding bed can be both pushed and pulled under the action of the at least one adjusting element.
  • the at least one adjusting element can be adjusted in a translatory manner at least along an adjusting axis.
  • Such a translational adjustment mobility can be implemented with structurally simple and robust means.
  • the at least one adjustment axis can in particular be aligned perpendicularly or at an angle to the underside and/or the contour of the folding bed.
  • the at least one adjustment axis is aligned coaxially to a normal direction of the folding bed contour.
  • the inventors have recognized that by a such alignment of the at least one adjustment axis, a particularly advantageous adjustability of the folding bed contour can be achieved. If several adjusting elements act at different points on the underside of the folding bed, these are preferably each aligned coaxially to the normal direction of the folding bed contour at the respective point.
  • the at least one adjustment device has at least one joint bearing, by means of which the at least one adjusting element is mounted in an articulated manner about at least one joint axis relative to the base frame.
  • the at least one joint bearing counteracts an unwanted state of tension between the base frame and the folding bed. Due to the articulated mounting of the at least one adjusting element, the adjusting element--in terms of an orientation of the adjusting movement--can be tracked as it were to the deformation state of the folding bed that is set, whereby the said tension states are avoided. Such states of tension can have a negative effect on the achievable quality of setting the folding bed contour.
  • the at least one joint axis is preferably aligned perpendicular to the adjustment movement of the at least one adjustment element.
  • the at least one joint bearing is designed as a ball joint bearing and allows spatial joint mobility of the at least one actuating element.
  • a ball joint bearing has a ball-like joint head which interacts with a spherical cap-shaped joint socket.
  • a bearing arrangement is preferably provided which allows both the adjustment mobility and the joint mobility of the at least one adjustment element in a combined manner.
  • Such a bearing arrangement can in particular be designed as a spherical axial bearing, or at least have such a spherical axial bearing.
  • the at least one adjustment device has a bearing housing which is fixedly connected to the base frame and in which the at least one adjustment element is mounted in an adjustable and/or articulated manner.
  • a bearing housing which is fixedly connected to the base frame and in which the at least one adjustment element is mounted in an adjustable and/or articulated manner.
  • the at least one adjusting element is an adjusting cylinder that can be screwed between the different adjusting positions.
  • One end of the actuating cylinder acts on the underside of the folding bed.
  • the latter is mounted in a screw-movable manner on the base frame or in the bearing housing, if one is provided. The positioning movement of the positioning cylinder takes place along its longitudinal axis and thus in the axial direction.
  • each control element forms a “degree of freedom” of adjustability, so to speak.
  • the multiple adjustment devices are of identical design, which means that the construction of the folding device can be simplified even further and that it can be constructed in a particularly cost-effective manner.
  • the folding bed is supported on the base frame exclusively via the multiple adjustment devices.
  • additional load-bearing components for supporting the folding bed on the base frame can be dispensed with.
  • the folding bed is supported solely by the multiple adjustment devices. As a result, a particularly simple construction can be achieved.
  • the folding bed and the adjustability of the at least one adjusting element are dimensioned in a coordinated manner, so that in the different adjusting positions of the at least one adjusting element an at least largely, preferably completely, reversible deformation of the folding bed is achieved.
  • the deformations of the folding bed caused by the action of the at least one adjusting element can be elastic and/or elastic-plastic, with this embodiment of the invention providing an at least largely elastic, preferably completely elastic, deformation.
  • the Falzbett are in terms of its flexibility on the one hand and on the other the extent of Adjustability constructively coordinated. This prevents plastic deformation of the folding bed from occurring during a maximum adjustment movement.
  • the folding bed contour can practically only be adjusted once.
  • plastic deformations of the folding bed contour can lead to a development length of the folding bed contour and a development length of the sheet metal component to be accommodated no longer matching, which can be regarded as fundamentally problematic.
  • the folding bed contour can accordingly be adjusted several times and in different ways, if this should be necessary.
  • the coordinated dimensioning of the folding bed and the adjustability can take place, for example, on the basis of empirical values, measured values and/or simulation results. It goes without saying that the structural design of the folding bed also takes into account the process forces occurring during folding.
  • the folding bed has at least one defined weakening, by means of which—compared to an imaginary unweakened state—an increased flexibility of the folding bed is achieved under the action of the at least one adjusting element. Due to the increased dimensional flexibility of the folding bed, the same can be deformed into the different deformation states under the influence of comparatively lower actuating forces of the at least one actuating element. As a result, the construction can be designed to be less massive and thus save material, which ultimately means that costs can be saved.
  • the at least one weakening can be due to the material and/or design.
  • the at least one weakening can be designed, for example, in the form of a bore, recess, notch, cross-sectional reduction or the like.
  • a hold-down device arranged above the folding bed, which has a hold-down frame supported on the base frame and a plurality of hold-down elements which are provided for holding down the sheet metal assembly and are attached to the hold-down frame, the hold-down elements being moved relative to each other by means of a guide element between different fastening positions are led to the hold-down frame.
  • the function and the basic structure of such a hold-down device are the prior art as such known.
  • the hold-down elements can be fastened in different positions on the hold-down frame in a manner coordinated with the folding bed contour set by means of the at least one adjustment device.
  • a guide element is assigned to each hold-down element. The respective hold-down element is guided between the different fastening positions by means of the guide element.
  • the guide elements can each be designed in particular in the form of a guide groove, a slotted hole or the like.
  • the invention also relates to a method with the features of claim 13.
  • a hemming device 1 for hemming a sheet metal assembly, not shown in the drawing, of a vehicle body and has a folding bed 2, which is supported on a base frame 3 in a manner that will be described in more detail below.
  • the sheet metal assembly is, for example, a hood or a vehicle door.
  • the folding bed 2 has a top O and a bottom U ( 2 , 3 ).
  • a folding bed contour K is formed on the upper side O of the folding bed 2 .
  • a sheet metal component of the sheet metal assembly called the outer part is first placed on the upper side O of the fold bed 2 .
  • another sheet metal component which can be referred to as the inner part, is placed on the outer part that is already positioned on the folding bed 2 .
  • the inner part is held down by means of a hold-down device N (cf. 7 ) fixed in a manner known in principle, with the hold-down device N not necessarily having to be part of the folding device 1 in the present case.
  • the outer part and the inner part are joined together in a linear manner at the edge by means of folding. Methods suitable for this are well known in the prior art and are therefore not described in detail at this point.
  • the folding device 1 has at least one adjustment device 4 assigned to the folding bed contour K.
  • the at least one adjusting device 4 is supported on the base frame 3 and has at least one adjusting element 5 .
  • the at least one adjusting element 5 can be adjusted between different adjusting positions relative to the base frame 3 and acts on the underside U of the folding bed 2 in a force-transmitting manner.
  • the folding bed 2 can be deformed into different deformation states D1, D2 for setting the folding bed contour K by means of an adjusting movement of the at least one adjusting element 5 (cf. 3 ).
  • a plurality of adjustment devices 4 are provided, each with an actuating element 5, with such a configuration not being mandatory.
  • only one setting device, a smaller or a greater number than the number of setting devices 4 shown here can be provided instead.
  • the folding bed contour K can be adjusted, ie the geometry of the folding bed contour K is changed and/or adjusted.
  • An adjusting movement of the at least one adjusting element 5 that is necessary for this setting of the folding bed contour K preferably takes place according to a predetermined setting specification, which can be based on empirical values, measured values and/or simulation results.
  • a total of 27 identical adjustment devices 4 are provided. To avoid repetition, the specific design selected here and the functioning of the adjustment devices 4 are only based on the figure 5 and 6 described in detail visible adjustment device 4. The other adjustment devices 4 have a corresponding design.
  • the adjustment device 4 has a bearing housing 6 which is firmly connected to the base frame 3 .
  • the bearing housing 6 is firmly joined to an unspecified upper side of the base frame 3 by means of a plurality of screw connections S.
  • the bearing housing 6 has a pot-shaped basic shape with a circumferential flange 7 at the edge, which is provided with through bores, not designated in any more detail, for the said screw connections S.
  • the actuating element 5 is movably mounted in the bearing housing 6 in a manner that will be described in more detail below.
  • the adjusting element 5 can be adjusted relative to the base frame 3 along an adjusting axis 8 in a translatory manner between the different adjusting positions.
  • the adjusting axis 8 is oriented coaxially to a longitudinal axis (not designated in more detail) of the adjusting element 5 , which is designed as an adjusting cylinder 9 in the embodiment shown.
  • the actuating cylinder 9 engages at its end region 10 facing the folding bed 2 in a force-transmitting manner on the underside U of the folding bed crown 2 .
  • the actuating element 5 or the actuating cylinder 9 acts on the underside U in a manner that transmits both tensile force and compressive force.
  • a screw connection between the adjusting element 5 and the folding bed 2 is provided here.
  • the folding bed 2 has at least one threaded hole 11 on its underside U ( 4 ), into which the front end area 10 of the actuating element 5 is screwed.
  • the front end region 10 is provided with a thread G which is complementary to the threaded bore 11 .
  • the folding bed 2 has a number of threaded holes 11 corresponding to the total number of adjusting elements 5 provided ( 3 ).
  • a lock nut can be screwed onto the thread G, which is locked on the underside U after the folding bed contour K has been set.
  • the front end area 10 can be welded to the underside U.
  • the adjusting element 5 is displaced along the adjusting axis 8, as a result of which the folding bed 2 is subjected to pressure or tension under the action of the adjusting element 5 becomes. Accordingly, the folding bed 2 is pushed upwards or pulled downwards along the actuating axis 8 in the region of the respective force application of the actuating element 5 and is thereby deformed at least locally elastically and/or elastically-plastically.
  • the based 3 The different states of deformation D1, D2 illustrated by way of example are accordingly achieved by a different and coordinated infeed of the plurality of adjusting elements 5.
  • a type of fixed point is defined at which the folding bed 2 is firmly positioned relative to the base frame 3 .
  • a fixed point can be formed, for example, by the folding bed 2 being firmly connected to the base frame 3 at at least one point.
  • said fixed point for setting the folding bed contour K is formed by providing a device 4' that is designed differently from the other setting devices 4 ( 1 ).
  • the device 4 ′ as such has a structure which is fundamentally similar to that of the setting devices 4 .
  • no adjustability is provided, so that the folding bed 2 is firmly positioned relative to the base frame 3 and is fixed to this extent by means of the device 4′—at the point of application of the device 4′.
  • the setting device 4 has a bearing arrangement L, which is accommodated in a receiving recess 12 in the bearing housing 6 .
  • the bearing arrangement L ensures an axial mounting of the adjusting element 5 for the purpose of adjusting mobility along the adjusting axis 8.
  • the bearing arrangement L ensures an articulated pivotable mounting relative to the base frame 3 (cf. figure 5 , 6 ).
  • the bearing arrangement L has a joint bearing in the form of a ball joint bearing 13, 14, 15, 16, which comprises two bearing elements 13, 15 that are spaced apart from one another in the axial direction of the actuating element 5 and are spherically shaped and two bearing shells 14, 16 that are designed to complement them.
  • the bearing shells 14, 16 are fitted into a cylindrical bearing bushing 17 in the radial direction and are arranged at opposite ends of the same.
  • the bearing bush 17 is held in the receiving recess 12 in the axial direction.
  • the bearing bushing 17 is held in the bearing housing 6 so that it can move to a limited extent in the radial direction of the receiving recess 12 .
  • the actuating element 5 is mounted in the bearing housing 6 so that it can move to a limited extent in the radial direction by means of the bearing arrangement L.
  • the actuating element 5 has a circular-cylindrical bearing section 18 which is arranged approximately centrally in relation to its longitudinal extension and on the outer circumference of which the bearing elements 13, 15 are fixed radially, with the bearing section 18 and thus the actuating element 5 being able to slide in the bearing elements in relation to the actuating axis 8 13, 15 is guided.
  • a spacer bushing 19 is provided, which is arranged between the bearing elements 13, 15 in the axial direction.
  • the thread G arranged at one end interacts with a first threaded nut 20 and a second threaded nut 21 for the adjusting mobility of the adjusting element 5 .
  • the adjusting element 5 is provided with a further thread G′ on a lower end region 25 facing away from the folding bed 2 , which thread interacts with a third threaded nut 22 and a fourth threaded nut 23 .
  • Upper bearing element 13 is an upper spacer sleeve 24 is arranged.
  • a lower spacer sleeve 26 is arranged between the third threaded nut 22 and the lower bearing element 15 .
  • the third threaded nut 22 and the fourth threaded nut 23 are first loosened.
  • the second threaded nut 21 is screw-actuated using a corresponding screwing tool, so that the actuating element 5 is moved upwards along the actuating axis 8 .
  • the front end 10 acts via the threaded hole 11 on the underside U of the folding bed 2, so that the same is locally pressed upwards in the area of the force application point of the adjustment element 5 relative to the base frame 3 and is thus elastically and/or elastically-plastically deformed becomes.
  • this can be fixed by tightening the third threaded nut 22 and the fourth threaded nut 23 as well as the first threaded nut 20 .
  • the first threaded nut 20 and the second threaded nut 21 are loosened. Thereafter, the actuating element 5 is displaced downwards along the actuating axis 8 by actuating the third threaded nut 22 . Accordingly, the folding bed 2 is pulled downwards, as it were, along the adjustment axis 8 by means of the adjustment element 5 and elastically and/or elastically-plastically deformed.
  • the setting position of the setting element 5 assumed here can be fixed by tightening the threaded nuts 20, 21, 23.
  • the setting devices 4 can be actuated successively and/or repeatedly until the desired deformation state is reached. In this way, a "local”, “regional” or “global” deformation of the folding bed 2 is possible.
  • the adjusting axes 8 of the adjusting elements 5 are each oriented coaxially to a normal direction of the folding bed contour K.
  • the folding bed contour K in the present case is not flat, but shaped spatially curved, so that the direction of the normal is locally variable over the extent of the folding bed contour K. Accordingly, there are different alignments of the respective adjustment axes 8.
  • the underside U is designed at least in sections parallel to the surface of the upper side O, on which in turn the folding bed contour K is formed. Accordingly, the actuating elements 5 act perpendicularly on the underside U at least at a few points.
  • the above-described articulated mounting of the adjusting elements 5 relative to the base frame 3 ensures that the adjusting axes 8 always remain aligned in the direction normal to the folding bed contour K, even in different states of deformation. In other words, the articulated mounting allows the adjusting axis 8 to follow the deformation that occurs.
  • the mounting of the bearing arrangement L which is movable to a limited extent in the radial direction of the bearing housing 6, simultaneously enables a translatory tracking movement.
  • the folding bed 2 is supported on the base frame 3 exclusively by means of the adjustment devices 4 and the device 4'.
  • the folding bed 2 can only be supported in sections by means of one or more adjustment devices 4 in a load-bearing manner on the base frame 3, so that apart from the one or more adjustment devices 4, there is a direct or at least non-adjustable, i.e. rigidly spaced, support for the folding bed 2 the base frame 3 is provided.
  • the folding bed 2 and the above-described adjustability of the adjusting elements 5 are dimensioned in a coordinated manner, so that in the different adjusting positions—and thus in the different deformation states D1, D2—there is a purely elastic deformation of the folding bed 2 in each case .
  • the fold bed contour K is reversible and can thus be adjusted multiple times—without loss of quality in terms of surface quality of the fold contour and/or the sheet metal assembly to be folded.
  • the design dimensioning of the folding bed 2 required for this and the adjustability can be based on empirical values, measured values and/or simulation results.
  • the folding bed 2 in the present case has at least one defined mechanical weakening M, which is designed in the present case in the form of a sectional reduction in the cross section of the folding bed 2 .
  • the folding bed 2 has increased dimensional flexibility under the action of the at least one actuating element 5—compared to an imaginary unweakened state.
  • the design of the weakening M shown here is to be understood as purely exemplary and can differ from this in the embodiments that are not shown.
  • the folding bed 2 has a design in the manner of a frame that is closed all the way around, but this is not mandatory.
  • the adjusting elements 5 act on the underside U at a distance from one another along a circumferential direction of the frame (not designated in any more detail).
  • the folding bed contour K is manufactured according to a so-called zero geometry of the sheet metal component to be accommodated.
  • the folding bed contour K at least in a state that is not deformed by means of the setting devices 4—corresponds to the zero geometry. Based on this zero geometry, the above-described geometric adjustment then takes place, i. H. Setting using the setting devices 4.
  • the folding bed contour is manufactured in a geometry that deviates from the zero geometry of the sheet metal component to be accommodated and can be set in particular in the direction of the zero geometry by means of the geometric adaptation described above.
  • the base frame 3 is manufactured as a cast component. In an embodiment not shown, the base frame 3 as a steel plate construction or be made of solid material.
  • the base frame 3 has a number of flange surfaces 27 corresponding to the number of adjustment devices 4 , which are provided for flange connection with the flange 7 of the respective adjustment device 4 .
  • the flange surfaces 27 are oriented parallel to its underside U with respect to an undeformed state of the folding bed 2 .
  • the flange surfaces 27 each have a central through hole 28 which, starting from an upper side of the base frame 3 (not designated in any more detail), opens into a respective lateral recess 29 .
  • the lower front ends 25 of the actuating elements 5 protrude through the through-holes 28 into the recesses 29 in the fully assembled state.
  • the third threaded nut 22 and the fourth threaded nut 23 in particular are freely accessible and ergonomically accessible with an appropriate screwing tool.
  • the folding device 1 in the embodiment shown also has a hold-down device N ( 7 ), which is arranged in a manner known in principle above the folding bed 2 for holding down the sheet metal assembly during the folding process.
  • the hold-down device N has a hold-down frame 30, which is supported by means of a plurality of support arms on centering devices 31 provided for this purpose on the base frame 3, with reference to FIG 7 only one support arm 32 is shown in the drawing.
  • the hold-down device N also has a plurality of hold-down elements 33 which rest on the sheet metal assembly during the fold processing and are arranged spaced apart from one another along a circumferential direction of the hold-down frame 30 , which is not designated in any more detail.
  • the hold-down elements 33 are each fastened to the hold-down frame 30, in the present case each of the hold-down elements 33 being assigned a guide element in the form of an angle plate 34 provided with elongated holes.
  • the angle plates 34 are screwed at one end to the hold-down element 33 in question. At the other end, the angle plates 34 are screwed to the hold-down frame 30 via the slotted holes.
  • the hold-down elements 33 are each guided in different fastening positions relative to the hold-down frame 30 between different fastening positions.
  • the hold-down elements 33 can be positioned and attached to the hold-down frame 30 in a way that is matched to the contour K of the folding bed that has been set.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Invalid Beds And Related Equipment (AREA)

Claims (13)

  1. Dispositif de pliage (1) pour le pliage d'un module en tôle, avec un banc de pliage (2) sur le côté supérieur (O) duquel un contour de banc de pliage (K) est formé et est prévu pour accueillir au moins un composant en tôle du module en tôle, et avec un bâti de base (3) sur lequel est appuyé le banc de pliage (2), sachant qu'est prévu au moins un dispositif de réglage (4) associé au contour du banc de pliage (K), lequel dispositif est appuyé contre le bâti de base (3) et présente au moins un élément de réglage (5) qui est mobile pour le réglage, pouvant se déplacer entre différentes positions de réglage, relativement au bâti de base (3) et s'engage sur un côté inférieur (U) du banc de pliage (2) en transmettant les forces, sachant que le banc de pliage (2) est déformable dans différents états de déformation (D1, D2) au moyen d'un mouvement de réglage de l'élément de réglage (5) afin de régler le contour du banc de pliage (K), caractérisé en ce que ledit au moins un élément de réglage (5) s'engage sur le côté inférieur (U) du banc de pliage (2) en transmettant la force de pression et la force de traction.
  2. Dispositif de pliage (1) selon la revendication 1, caractérisé en ce que ledit au moins un élément de réglage (5) est mobile par translation pour le réglage au moins le long d'un axe de réglage (8).
  3. Dispositif de pliage (1) selon la revendication 2, caractérisé en ce que ledit au moins un axe de réglage (8) est orienté coaxialement par rapport à une direction normale du contour de banc de pliage (K).
  4. Dispositif de pliage (1) selon l'une des revendications précédentes, caractérisé en ce que ledit au moins un dispositif de réglage (4) présente au moins une rotule d'articulation (13, 14, 15, 16) au moyen de laquelle ledit au moins un élément de réglage (5) est monté de manière mobile par articulation autour d'un axe d'articulation, par rapport au bâti de base (3).
  5. Dispositif de pliage (1) selon la revendication 4, caractérisé en ce que ladite au moins une rotule d'articulation (13, 14, 15, 16) est conçue comme palier à rotule et permet une mobilité spatiale par articulation dudit au moins un élément de réglage (5).
  6. Dispositif de pliage (1) selon l'une des revendications précédentes, caractérisé en ce que ledit au moins un dispositif de réglage (4) présente un carter de palier (6) fixé au bâti de base (3) dans lequel ledit au moins un élément de réglage (5) est monté de manière mobile pour le réglage et/ou mobile par articulation.
  7. Dispositif de pliage (1) selon l'une des revendications précédentes, caractérisé en ce que ledit au moins un élément de réglage (5) est un vérin de réglage (9) mobile par vis entre les différentes positions de réglage.
  8. Dispositif de pliage (1) selon l'une des revendications précédentes, caractérisé en ce que sont prévus plusieurs dispositifs de réglage (4) notamment de construction identique, sachant que les éléments de réglage (5) de la pluralité des dispositifs de réglage (4) s'engagent sur différentes zones du côté inférieur (U) du banc de pliage (2) et sont mobiles indépendamment les uns des autres pour le réglage.
  9. Dispositif de pliage (1) selon la revendication 8, caractérisé en ce que le banc de pliage (2) est appuyé sur le bâti de base (3) exclusivement via la pluralité des dispositifs de réglage (4).
  10. Dispositif de pliage (1) selon l'une des revendications précédentes, caractérisé en ce que le banc de pliage (2) et la mobilité de réglage dudit au moins un élément de réglage (5) sont dimensionnés d'une façon adaptée l'un à l'autre de sorte que dans les différentes positions de réglage dudit au moins un élément de réglage (5), respectivement une déformation réversible au moins en grande partie, de préférence totale du banc de pliage (2) est atteinte.
  11. Dispositif de pliage (1) selon l'une des revendications précédentes, caractérisé en ce que le banc de pliage (2) présente au moins une atténuation définie (M) au moyen de laquelle est atteinte une élasticité de forme accrue du banc de pliage (2) - en comparaison d'un état théorique non atténué - sous l'effet dudit au moins un élément de réglage (5).
  12. Dispositif de pliage (1) selon l'une des revendications précédentes, caractérisé en ce qu'est prévu un dispositif de retenue (N) disposé au-dessus du banc de pliage (2), qui présente un cadre de retenue (30) appuyé sur le bâti de base (3) et plusieurs éléments de retenue (33) qui sont prévus pour retenir le module en tôle et sont fixés sur le cadre de retenue (30), sachant que les éléments de retenue (33) sont guidés entre différentes positions de fixation par rapport au cadre de retenue (30), au moyen respectivement d'un élément de guidage (34).
  13. Procédé pour régler un contour de banc de pliage (K) d'un dispositif de pliage (1), sachant que le dispositif de pliage (1) présente un banc de pliage (2) sur le côté supérieur (O) duquel le contour du banc de pliage (K) est formé et prévu pour accueillir au moins un composant en tôle, un bâti de base (3), sur lequel est appuyé le banc de pliage (2), un dispositif de réglage (4) associé au contour du banc de pliage (K), lequel dispositif est appuyé sur le bâti de base (3), et au moins un élément de réglage (5) qui est mobile pour le réglage, entre différentes positions de réglage, le long d'un axe de réglage (8), par rapport au bâti de base (3) et s'engage sur un côté inférieur (U) du banc de pliage (2) en transmettant la force de pression et la force de traction, sachant que le procédé présente l'étape suivante :
    Mouvement dudit au moins un élément de réglage (5) entre les différentes positions de réglage, ce qui soumet le banc de pliage (2) à une traction ou à une pression, sous l'effet de l'élément de réglage (5) et a pour effet que le contour de banc de pliage (K) est déformé dans différents états de déformation (D1, D2) et est ainsi réglé.
EP20213769.1A 2020-01-31 2020-12-14 Dispositif de pliage destiné à l'usinage par pliage d'un module de tôle Active EP3858512B1 (fr)

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DE102020201185.0A DE102020201185A1 (de) 2020-01-31 2020-01-31 Falzvorrichtung zur Falzbearbeitung einer Blechbaugruppe

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EP3858512C0 EP3858512C0 (fr) 2023-06-07
EP3858512B1 true EP3858512B1 (fr) 2023-06-07

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Publication number Priority date Publication date Assignee Title
DE10203491A1 (de) 2002-01-30 2003-07-31 Helmut Reccius Umformwerkzeug
DE102014215001B4 (de) 2014-07-30 2020-02-20 J. Schmalz Gmbh Spannsystem zum Spannen und Greifen unebener Werkstücke sowie Verfahren zum Betreiben eines solchen Spannsystems
JP6698070B2 (ja) 2015-03-25 2020-05-27 株式会社ヒロテック 加工装置
DE102015220540A1 (de) 2015-10-21 2017-04-27 Volkswagen Aktiengesellschaft Falzeinrichtung und Verfahren zum Falzen eines Bauteils
DE202016100596U1 (de) 2016-02-05 2016-06-07 Edag Production Solutions Gmbh & Co. Kg Gegenhalter zum Stützen mindestens eines Bauteils bei einer Bauteilbehandlung
JP6281928B1 (ja) * 2017-06-16 2018-02-21 株式会社ヒロテック ヘミング加工装置及びヘミング加工方法

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CN113198884A (zh) 2021-08-03
EP3858512A1 (fr) 2021-08-04
DE102020201185A1 (de) 2021-08-05

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