WO1991013704A1 - Dispositif de pliage des toles - Google Patents

Dispositif de pliage des toles Download PDF

Info

Publication number
WO1991013704A1
WO1991013704A1 PCT/AT1991/000044 AT9100044W WO9113704A1 WO 1991013704 A1 WO1991013704 A1 WO 1991013704A1 AT 9100044 W AT9100044 W AT 9100044W WO 9113704 A1 WO9113704 A1 WO 9113704A1
Authority
WO
WIPO (PCT)
Prior art keywords
bending
bending device
punch
sheet
upper punch
Prior art date
Application number
PCT/AT1991/000044
Other languages
German (de)
English (en)
Inventor
Otto Schubert
Original Assignee
Lift Verkaufsgeräte-Gesellschaft M.B.H.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lift Verkaufsgeräte-Gesellschaft M.B.H. filed Critical Lift Verkaufsgeräte-Gesellschaft M.B.H.
Priority to AT9191906557T priority Critical patent/ATE105216T1/de
Priority to KR1019910701614A priority patent/KR920700792A/ko
Priority to BR9205777A priority patent/BR9205777A/pt
Priority to EP91906557A priority patent/EP0476092B1/fr
Priority to DE59101563T priority patent/DE59101563D1/de
Publication of WO1991013704A1 publication Critical patent/WO1991013704A1/fr
Priority to SU915010375A priority patent/RU2015769C1/ru
Priority to US07/847,749 priority patent/US5295384A/en
Priority to SI9210226A priority patent/SI9210226A/sl
Priority to CS931860A priority patent/CZ283115B6/cs
Priority to CA002105587A priority patent/CA2105587A1/fr
Priority to SK981-93A priority patent/SK279575B6/sk
Priority to DE59200920T priority patent/DE59200920D1/de
Priority to JP4505883A priority patent/JP2672402B2/ja
Priority to DK92906012.7T priority patent/DK0575393T3/da
Priority to KR1019930702747A priority patent/KR960007488B1/ko
Priority to AT92906012T priority patent/ATE115014T1/de
Priority to EP92906012A priority patent/EP0575393B1/fr
Priority to ES92906012T priority patent/ES2065177T3/es
Priority to PCT/AT1992/000032 priority patent/WO1992016319A1/fr
Priority to AU13491/92A priority patent/AU657312B2/en
Priority to CN92101602A priority patent/CN1045731C/zh
Priority to AR92321920A priority patent/AR246448A1/es

Links

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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • 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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • 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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0263—Die with two oscillating halves

Definitions

  • the invention relates to a sheet metal bending device with an upper punch which can be moved up and down relative to a frame transversely to the sheet plane and which is opposed by two lower stamps arranged on the frame.
  • a sheet is bent along a straight bending edge by moving an upper punch (also called upper tool) against the sheet resting on a lower die or on two lower, stationary punches (lower tools), the upper punch being the sheet with the area of the bending edge to be molded into the die or between the two lower punches, whereby the bending of the sheet is accomplished.
  • the disadvantage here is that generally no precisely defined or sharp bending edges can be formed, and furthermore that a considerable part of the energy applied is lost due to friction on the die or on the stationary lower punches.
  • a bending device for already profiled sheets (WO 81/02535) in order to provide these profiled sheets with a corrugation, with an upper, up and down movable die with a stationary lower die and with oblique ones arranged on both sides in the direction their main level works diagonally up and down movable additional stamps. While the upper stamp forms the corrugation in the sheet with the stationary lower stamp opposite it, the two oblique stamps on the side prepare the next corrugation.
  • This known bending machine is not designed and is not suitable for simple bending of a sheet with the sharpest possible bending edge.
  • the plate bending device according to the invention of the type mentioned at the outset is characterized in that at least two stamps are mounted in the frame so as to be pivotable about an axis which generally extends in the region of the bending of the plate and are coupled to a pivoting mechanism.
  • the above objective is advantageously met, whereby at least one of the lower punches - in this case together with the upper punch - or both lower punches are pivoted when bending the sheet metal with the sheet metal areas to be bent against one another only a gentle, energy-saving bending work on the sheet is made possible, but moreover, since then the upper punch can be easily formed with a sharp lower edge around which the sheet is bent, also sharp or precisely defined bending edges can be generated.
  • the construction of the bending device can be relatively simple, in particular no solid frame is required as in conventional bending presses.
  • the two lower punches are mounted in the frame so as to be pivotable in opposite directions about an axis running in the region of the bending of the sheet.
  • the movement of the lower punches can take place in equilibrium with the upper punch or with each other, and since the swiveling of the lower punches together with the sheet metal sections can be found with comparatively low forces.
  • the lower punches can be pivoted about a common axis.
  • the mentioned common axis, about which the lower punches are pivoted, lies in the area of the bending edge to be formed in the sheet.
  • the common axis for the intended purpose of the sharp bending edge is preferably in the plane of the up and down movement of the upper punch.
  • the upper punch can be locked in its working position brought up to the surface of the sheet to be bent and thus forms a stationary counter-punch during bending, around which the sheet can be bent by means of the counter-rotating lower punch.
  • the upper punch in order to hold back a hindrance by the upper punch, against which the multi-bent sheet then abuts, when bending a sheet several times, it is also advantageous if the upper punch with its holder is moved up and down on the support on the frame an axis parallel to or coinciding with the bending edge in the sheet metal is pivotably mounted. With such a design, a lateral pivoting away of the upper punch in the final phase of the respective bending process is made possible when the multi-bent sheet metal abuts against it.
  • the upper punch can be pivoted freely, or it can be connected to a swivel drive which is activated, for example, by a microswitch against which the sheet metal abuts.
  • the lower punches are assigned a rack and pinion gear as a pivoting mechanism.
  • the rack and pinion gears are preferably arranged symmetrically and in particular coupled to a common drive motor.
  • An advantageous embodiment is further characterized in that several racks are articulated on each lower punch distributed over the width of the device, which in turn mesh with gearwheels seated on a shaft, as a result of which the lower punch can be driven simultaneously in several places across the width of the device .
  • the lower punches have pressure bodies which are freely pivotable on their upper sides and come into contact with the sheet.
  • the pressure bodies are flat on their upper side and are each mounted in a partially cylindrical bed provided in the corresponding lower punch.
  • the lower punches are designed in a cutting-like manner on their upper side, with a convex curve.
  • the upper one e.g. sword-shaped stamp a cutting-like lower bending edge, e.g. with convex curvature.
  • the lower stamps are coupled with at least one pair of angle levers for their movement during pivoting, which in turn are connected to one another centrally via a joint are.
  • the angle levers can be provided on one or both end faces of the bending device, or several angle lever pairs can be provided over the width of the device, which is particularly preferred for larger constructions.
  • the joints, via which the angle levers of a pair are tied together, move in particular in the vertical center plane of the bending device, in which the common pivot axis mentioned also lies.
  • This center plane is, in particular, also the plane along which the upper punch can possibly be moved up and down.
  • angle levers are in each case articulated on the one hand with one of the lower punches and on the other hand are displaceably guided with a sliding block or the like in a sliding groove of the other of the lower punches.
  • An embodiment which is kinematically equivalent to the above embodiments, but which is preferred in certain cases with regard to the design of the stationary part of the bending device (for example because of the stationary fixation of one sheet metal section during bending), is further characterized in that one lower punch is stationary and the other lower Stamp and the upper stamp are pivotally mounted, wherein the pivotable lower stamp can be driven at twice the angular speed compared to the upper stamp.
  • the lower punches - like the upper punches - can be cheek-shaped.
  • Figure 1 is a schematic, perspective view of a sheet metal bending device according to the invention in the rest position.
  • FIG. 3 shows a diagrammatic representation corresponding to FIG. 1 of this sheet metal bending device in a work phase in which the sheet metal bending is started;
  • FIG. 6 shows a very schematic, partially sectioned end view of the essential working parts of the sheet metal bending device in the rest position corresponding to FIG. 1;
  • FIG. 7 shows a corresponding schematic end view of these working parts of the sheet metal bending device, but now in accordance with the illustration in FIG. 2 at the beginning of the bending process;
  • FIG. 8 shows a corresponding front view of these working parts as shown in FIG. 4, with the sheet almost bent;
  • FIG. 9 is a corresponding front view of the working parts of the sheet metal bending device at the end of the bending process, in a work phase representation according to FIG.
  • FIG. 12 shows a schematic front view corresponding to FIG. 9 of an embodiment of the bending device with modified lower bending dies
  • FIG. 13 shows a schematic partial view of a further modified lower bending punch
  • Fig. 14 is a schematic cross section through the upper part of a lower, e.g. 6 left bending punch, along the line XIV-XIV in Fig. 15, to illustrate bearing recesses and sliding or. Guide grooves in the punch;
  • Figure 15 is a partial view of the inside of this lower punch, seen essentially in the direction of arrow XV in Fig. 14 .; 16 shows an axonometric representation of a double angle lever arrangement serving for the articulated connection, mounting and movement control for the lower bending punches;
  • FIG. 17 is a sectional view similar to FIG. 14, but now with a double angle lever arrangement, along the line XVII-XVII in FIG. 18;
  • Fig. 18 is a view, partly in section, along the line XVIII in Fig. 17;
  • FIGS. 14 and 17 are sectional views similar to FIGS. 14 and 17, but now with both lower bending punches and the double angle lever arrangement, to illustrate different phases during the pivoting of the lower bending punches;
  • FIG. 22 shows a schematic, diagrammatic view of the arrangement of the punches of a further modified bending device
  • 26 is a schematic end view, generally corresponding approximately to the illustration in FIG. 7, of yet another bending device, the initial position of the bending tools being shown with full lines and an intermediate position with dashed lines.
  • the present, generally designated 1 sheet bending device or press in the currently particularly preferred embodiment has a lower frame 2, on which 3, 4 vertical guides 5 are provided in the front main supports, in which columnar supports 6, 7 are guided vertically up and down.
  • These carriers 6, 7 carry an upper holder 8 with a crosshead 9 on which an upper, cheek-shaped or sword-shaped punch 10 (also an upper tool, an upper bending tool or an upper bending punch) )) is fastened in an exchangeable manner, the holder 8 for the upper punch 10 being mounted on the supports 6, 7 in conventional pivot joints 11, 12, which are conventional per se and are only illustrated schematically, for example freely pivotable.
  • This pivot bearing will be explained in more detail below with reference to FIGS. 5 and 9.
  • the pivot axis defined by the pivot joints 11, 12 of the holder 8 on the supports 6, 7 preferably runs along the lower bending edge 13 of the upper bending punch 10, which is designed like a blade.
  • spindle drives For moving the upper punch 10 up and down, conventional spindle drives, for example, are connected to the supports 6, 7, as is illustrated only very schematically at 14 in FIG. 1.
  • These spindle drives 14 contain, for example, spindles 16 driven by a drive motor 15, optionally via a gear and a clutch (not shown), which cooperate with a spindle nut 17 provided on the underside of the carriers 6, 7, in order to support the carriers when the spindles 16 rotate 6 or 7 to move up and down in their guides 5.
  • These spindle drives 14 and further drive devices to be explained in more detail are accommodated on or in the frame 2 in a conventional manner.
  • two lower, in particular plate or cheek-shaped bending punches 19, 20 are further provided on the frame 2.
  • These two lower bending dies 19, 20 are pivotally mounted on the frame 2 in a manner not illustrated in FIGS. 1 to 9, for example with the aid of double lever arrangements hinged on the end face or cam guides on the main supports 3, 4.
  • An example of such an arrangement for guiding the movement of the two lower bending dies 19, 20 when pivoting will be explained below with reference to FIGS. 14 to 21.
  • FIG. 26 Another example is shown in FIG. 26. Based on these Movement guidance, the two lower bending dies 19, 20 are at least essentially pivotable about a common pivot axis 21 (see, for example, FIGS.
  • the common pivot axis 21 preferably coincides with the axis defined by the pivot joints 10, 11 for the pivoting of the upper punch 10 together with its holder 8 relative to the supports 6, 7 when the upper punch 10 is in its working position according to FIG. 3 to 5 or 7 to 9, in which it serves as a stationary counter tool for bending.
  • the up and down displaceable carriers 6, 7 have been omitted and only the holder 8 with the upper stamp 10 and the Swivel joints 10, 11 are indicated schematically.
  • the plane in which the upper punch 10 can be moved up and down is indicated at 23 in FIGS. 6 to 8.
  • a drive mechanism for pivoting the lower bending dies 19, 20 around the common pivot axis 21 is a pivot mechanism which, in the present exemplary embodiment, distributed over the width of the bending device 1, contains a plurality of rack and pinion gears schematically indicated at 24 in FIGS. 1 to 5.
  • a rack 25 is articulated in each case in the lower region of the respective lower bending die 19 or 20, as indicated schematically at 26 in FIG. 6.
  • These toothed racks 25 mesh with shafts 29 and 30 of the same size that sit on shafts parallel to one another and to the bending dies 19, 20 (which are indicated in FIGS. 6 to 9 by their geometric axes 27 and 28, respectively).
  • the one shaft for example 27, is driven by a drive motor, preferably the single, common drive motor 15, which also drives the spindle drives 14 for the upper punch 10, as shown schematically in FIG. 6 6, a gear mechanism 'symbolically indicated in FIG. 6 by a gear 31 may be interposed, in a manner similar to that which can also be provided in the case of the spindle drive 14 (not shown).
  • a drive motor preferably the single, common drive motor 15
  • a gear mechanism 'symbolically indicated in FIG. 6 by a gear 31 may be interposed, in a manner similar to that which can also be provided in the case of the spindle drive 14 (not shown).
  • the two shafts 27, 28 extend over the entire width of the bending device 1, and they are rotatably mounted on the front side and optionally also at intermediate points, between the individual rack drives 24, in corresponding bearings (not shown) in the frame 2.
  • the toothed racks 25 are therefore shifted lengthways, pivoting the lower bending punches 19, 20 connected to them in a symmetrical movement in the manner of a spreading apart, cf. in particular the representations in Fig. 7 (rest position) and 8 (swung-apart working position).
  • the toothed racks 25 can be accommodated and guided in tubular housings 32, as is schematically illustrated in FIG. 6, these housings 32 having flange sections 33 of the respective shaft 27 and 28 are freely rotatable.
  • the gears 29, 30 pass through slot openings parallel to the longitudinal axis of the rack 25 in the tubular housings 32 in order to be able to mesh with the racks 25 stored therein.
  • the starting or rest position of the sheet metal bending device 1 is illustrated in FIGS. 1, 2 and 6.
  • the upper punch 10 assumes its upper rest position, which is lifted from the sheet 18, and in this position a position to be bent can be used Sheet 18 is manually or mechanically fed to the bending device 1 and brought into position on it. If a sheet metal bending cycle is now started, the upper punch 10 together with its holder 8 is first moved downwards in the guides 5 with the aid of the supports 6, 7 until the upper punch 10 with its edge 13 (which is in particular in alignment with the axis 11, 12) touches the sheet 18 to be bent, which was previously brought onto the lower bending dies 19, 20.
  • This phase in which the sheet 18 is practically clamped between the three bending dies 10, 19 and 20, but has not yet been bent, is illustrated in FIGS. 3 and 7 and further with solid lines in FIGS. 10 and 11.
  • the upper punch 10 together with its holder 8, for example with the aid of the spindle drive 14 (FIG. 1), is advantageously locked or locked in position so that it forms a stationary counter-punch during this bending process.
  • the sheet 18 is bent, for example, by approximately 90 ° along the bending edge 22, cf. the representation in Figures 4 and 8; As is further illustrated in FIGS. 10 and 11, an acute bending angle can also be brought about in the sheet 18 during this bending process, cf. there the position of the lower bending dies 19, 20 shown in dashed lines.
  • the bending process is thus ended and the drives are reversed in order to pivot the lower bending dies 19, 20 back into the vertical starting position and to move the upper bending die 10 upwards and to straighten them again.
  • the bent sheet 18 can now be advanced one step further or removed from the device 1.
  • the lower, pivotable bending punches can be provided on their upper side in the rest position with rod-like pressure bodies 35, 36 which are approximately semicircular in cross section and which are arranged in a semi-cylindrical Bed 37 and 38 (Fig. 10 and 11) on the upper sides of the lower punch 19, 20 are freely pivoted.
  • rod-like pressure bodies 35, 36 which have a flat surface 39 facing the sheet 18 to be bent, an adaptation to the respective sheet 18, in particular with different sheet thicknesses, is possible in a simple manner.
  • the lower bending punches 19, 20 can instead also be provided with a cutting-like upper side, with a convex rounding, as illustrated at 40 in FIG. 12.
  • this embodiment corresponds to the device described above, and in particular the representation in FIG. 12 corresponds to the representation in FIG. 9, ie the final state after a bending process, with the upper punch 10 pivoted to the side, is illustrated, so that a new one Explanation of how given above with reference to FIGS. 1 to 5 or 6 to 9, can be omitted.
  • Fig. 13 is a schematic partial view of another embodiment of the lower punch, e.g. of the punch 19, illustrated.
  • a pressure body 35 with a flat upper side 39 is pivotably mounted on the upper side of this bending die 19.
  • schematically illustrated front pivot pins 41 and a channel-shaped bearing recess 42 are provided for mounting the prismatic pressure body 35, which is approximately triangular in cross section.
  • FIGS. 14 to 21 An example of an arrangement for mounting, articulated connection and movement control of the lower bending punches 19, 20 will now be described with reference to FIGS. 14 to 21.
  • FIGS. 14 and 15 only show the upper part of the lower bending die 19, whereas in FIGS. 17 and 18 the upper part of this lower bending die 19 is shown together with a pair of angle levers. This pair of angle levers is illustrated by itself in a schematic axonometric view in FIG. 16.
  • a blind hole-like bearing recess 43 and a continuous slot-shaped opening 44 with straight sliding grooves 45 are provided in the respective lower bending punch, for example in the bending punch 19, wherein in view (see FIG 15) results in a cross shape of this opening 44 with the sliding grooves 45.
  • At least one pair of double angled ones is used for the articulated connection of the two lower bending dies 19, 20 (see FIGS. 19 to 21)
  • Angle levers 46, 47, s. also FIG. 16 these angle levers 46, 47 being pivotally connected to one another in an angular range at 48.
  • 16 indicates a pin for the pivot connection of the two angle levers 46, 47, but it can also be a continuous axis that extends over the entire width of the bending device according to FIGS. 1 to 5, wherein such a design will be provided if several such pairs of angle levers are provided distributed over the width of the bending device 1, similar to that described for the rack and pinion gear 24.
  • Each lower punch e.g. the bending die 19 is articulated to one of the angle levers 46, 47 of such a pair of articulated angle levers, in the region of its bearing recess 43 in which one end of an arm 49 of the one angle lever, e.g. of the angle lever 46 (FIGS. 14, 17 and 18), is pivotably articulated by means of a pivot pin (or in turn a continuous pivot axis) 50.
  • this lower bending punch, e.g. 19, the opposite end of the other angle lever, ie here the angle lever 47, is displaceable in the sliding grooves 45 of the through opening or opening 44.
  • a pair of sliding blocks 51 can be pivotably attached to the end of the angle lever 47, and these sliding blocks 51 are guided in the sliding grooves 45 in a linearly displaceable manner, cf. from FIG. 16 in particular also the representation in FIGS. 17 and 18. It should be pointed out that in FIG. 18 the second sliding block 51 is covered by the other angle lever 46 and therefore cannot be seen.
  • the lower bending dies 19, 20 have already been pivoted over part of their swivel stroke, and according to the illustration in FIG. 21 they have finally reached their end swivel position, for example. 19 to 21 it can be seen that the hinge axis 48 of the angle lever pairs 46, 47 moves essentially vertically according to the center plane (plane 23 according to FIG. 6). Otherwise, the sliding blocks 51 slide in their sliding or control grooves 45 during this pivoting movement, whereas the angle levers 46, 47 are pivoted with their opposite ends relative to the respective bending dies 19, 20.
  • bearing blocks (not shown) in the bearing recesses 43 from the inside or front side (which can be seen in FIG. 15) ) to be used, the ends of the angle levers 46, 47 being pivoted in these bearing blocks.
  • the dimensions of these bearing blocks can correspond exactly to the bearing recesses 43, and can also be secured in these bearing recesses 43 with the aid of screws or bolts.
  • a further sheet metal bending device 1 is illustrated very schematically with its essential working parts, with regard to the relative movement of its Stamp or tools 10, 19 and 20 completely corresponds to the previously described exemplary embodiments, but during the bending process it is not the upper stamp 10 that is held stationary, but the one, as shown in FIGS. 22 to 25, the lower stamp 20 on the right, whereas the other lower punch 19 is pivoted when bending the sheet metal 18 (see FIGS. 23 to 25) in accordance with the previous exemplary embodiments, and in order to bring about the relative pivoting movements between the stamps, the upper punch 10 - with half the angular velocity in comparison to the lower left punch 19 - is pivoted, see also the intermediate position of the three punches shown in FIG.
  • the two lower punches 19, 20 are hingedly connected to one another with interlocking eyelet members 52 to form the hinge joint 53, a hinge axis 54 extending through the entire joint arrangement.
  • the two lower punches 19, 20 have a rounded cheek shape where they come into contact with the sheet 18 to be bent.
  • the two lower tools or stamps 19 can also be lighter Interchangeability, be made up of individual segments 55, which are firmly connected to a tool carrier or punch lower part 56, for example with the aid of bolts 57.
  • circular-shaped guide rails 58 can be provided with a toothing, not shown, which extend through guide slots 59 in the base part 56 of the other lower punch 20 and with drive gear wheels 60, which in principle correspond to the gear wheels 29 and 30, respectively 6 to 9 correspond, comb.
  • the drive for these gear wheels 59 can take place in the manner already mentioned with reference to FIGS. 6 to 9 via a drive motor (not shown in more detail in FIG. 22) and a transmission.
  • Fig. 22 it is also schematically illustrated with broken lines how, when the gear 60 is rotated counterclockwise (see arrow), the left stamp 19 outwards, i.e. is pivoted away from the right stamp 20.
  • the upper stamp 10 also pivots - as mentioned at half the angular velocity in relation to the lower stamp 19.
  • the drive of the upper punch 10 can take place in a manner basically analogous to that for the lower punch 19, the required transmission ratio of 2: 1 having to be ensured via a gear.
  • Such a drive arrangement is conventional per se, so that it does not need to be explained further at this point.
  • the mounting of the upper punch 10 in the frame (not illustrated in more detail) in the bending device according to FIG. 22 can in principle be provided in a manner similar to that explained above with reference to FIGS. 1 to 5, i.e. in particular with supports 6, 7 and an upper bracket 8 pivotably mounted thereon.
  • pivot axis 21 for the relative pivoting between the lower bending dies 19, 20 is illustrated, which here with the geometric axis of the Joint axis 54 (FIG. 22) of the hinge joint 53 coincides.
  • the upper punch 10 is also pivoted about this pivot axis 21 during bending, see the illustration in FIGS. 24 and 25.
  • the center of the arcuate rails 58 lies on this pivot axis 21 (i.e. the geometric axis of the hinge axis 54).
  • the two lower punches 19, 20 are in turn pivoted symmetrically relative to the upper punch 10, which is only symbolized here by a circle illustrating the curvature of the bending edge, with circular guideways with correspondingly circular tooth segments 61 (for the Bending punch 19) or 62 (for the bending punch 20) are provided.
  • a common drive gear 65 which can be coupled to a motor (corresponding to the motor 15 in FIG. 6), and the gears 63, 64 mesh directly with one another for their counter-rotating movement, similar to the gears 29, 30 according to FIG. 6.
  • Shoes 66 and 67 are firmly connected to the toothed rails 61 and 62, these shoes 66, 67 being guided as sliding shoes in the slideways which are not shown in more detail and which are equipped with the toothed rails 61, 62. With these shoes 66, 67, the tool holders 68, 69 for the lower tools 19, 20 are connected via joints 70 and 71, respectively, so as to enable slight compensating movements of the lower tools or punches 19, 20 relative to the sheet metal surface during bending.
  • the upper punch 10 is driven vertically downward when the sheet 18 is bent, for example with the aid of a drive similar to the spindle drive 14 according to FIG. 1, this vertical downward drive with the pivoting movement of the lower tools 19, 20, for example via a numerical control a computer (not shown) - is coupled to depending on To achieve sheet thickness that when bending the sheet 18, when the two lower punches 19, 20 swing apart and at the same time the upper punch 10 moves downward, cf. the dashed intermediate position shown in FIG. 26 when bending to achieve a frictional engagement of the lower punches 19, 20 on the sheet 18, so that there is no relative movement between these punches and the sheet 18 along its surface. This ensures a particularly gentle treatment of the sheet 18 during bending, and surface defects that otherwise occur frequently are avoided.
  • circular-toothed racks as explained with reference to FIGS. 22 or 26, can also be used in the embodiment according to FIGS. 1 to 11 (and conversely straight-line racks, for example, in the embodiment according to FIGS. 22 or 26).
  • a subdivision into individual stamp segments 55, as explained with reference to FIG. 22, can of course also be provided in all other exemplary embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Making Paper Articles (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

On décrit un dispositif de pliage des tôles (1) avec un poinçon supérieur (10) du type lame se déplaçant vers le haut et vers le bas par rapport à un bâti (2), transversalement par rapport au plan de la tôle, et pivotant le cas échéant, poinçon auquel sont opposés deux poinçons inférieurs (19, 20) en forme de joue qui pivotent par rapport au poinçon supérieur (10) autour d'un axe commun situé au niveau du pliage de la tôle (18), un mécanisme de pivotement (24) étant prévu pour le pivotement des poinçons, et le poinçon supérieur (10) formant pendant le pliage, dans sa position de travail au contact de la surface de la tôle (18) à plier, un contre-poinçon fixe autour duquel la tôle (18) est pliée au moyen des poinçons inférieurs (19, 20).
PCT/AT1991/000044 1990-03-15 1991-03-14 Dispositif de pliage des toles WO1991013704A1 (fr)

Priority Applications (22)

Application Number Priority Date Filing Date Title
AT9191906557T ATE105216T1 (de) 1990-03-15 1991-03-14 Blechbiegevorrichtung.
KR1019910701614A KR920700792A (ko) 1990-03-15 1991-03-14 판재 절곡 장치(Plate Bending Machine)
BR9205777A BR9205777A (pt) 1991-03-14 1991-03-14 Dispositivo de dobramento de chapas metálicas
EP91906557A EP0476092B1 (fr) 1990-03-15 1991-03-14 Dispositif de pliage des toles
DE59101563T DE59101563D1 (de) 1990-03-15 1991-03-14 Blechbiegevorrichtung.
SU915010375A RU2015769C1 (ru) 1990-03-15 1991-11-14 Устройство для гибки листов
US07/847,749 US5295384A (en) 1990-03-15 1992-03-05 Sheet-metal bending device
SI9210226A SI9210226A (sl) 1991-03-14 1992-03-06 Priprava za upogibanje pločevine
AU13491/92A AU657312B2 (en) 1991-03-14 1992-03-11 Sheet-metal bending device
SK981-93A SK279575B6 (sk) 1991-03-14 1992-03-11 Ohýbací stroj na ohýbanie plechov
AT92906012T ATE115014T1 (de) 1991-03-14 1992-03-11 Blechbiegevorrichtung.
CS931860A CZ283115B6 (cs) 1991-03-14 1992-03-11 Ohýbací stroj k ohýbání plechů
DE59200920T DE59200920D1 (de) 1991-03-14 1992-03-11 Blechbiegevorrichtung.
JP4505883A JP2672402B2 (ja) 1991-03-14 1992-03-11 シート曲げ加工機械
DK92906012.7T DK0575393T3 (da) 1991-03-14 1992-03-11 Pladebukkeindretning
KR1019930702747A KR960007488B1 (ko) 1991-03-14 1992-03-11 판재절곡장치
CA002105587A CA2105587A1 (fr) 1991-03-14 1992-03-11 Machine a plier pour toles
EP92906012A EP0575393B1 (fr) 1991-03-14 1992-03-11 Cintreuse pour toles
ES92906012T ES2065177T3 (es) 1991-03-14 1992-03-11 Dispositivo de doblado de chapa.
PCT/AT1992/000032 WO1992016319A1 (fr) 1991-03-14 1992-03-11 Cintreuse pour toles
AR92321920A AR246448A1 (es) 1991-03-14 1992-03-13 Maquina dobladora de chapa.
CN92101602A CN1045731C (zh) 1991-03-14 1992-03-13 弯板装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA621/90 1990-03-15
AT0062190A AT393639B (de) 1990-03-15 1990-03-15 Blechbiegevorrichtung

Publications (1)

Publication Number Publication Date
WO1991013704A1 true WO1991013704A1 (fr) 1991-09-19

Family

ID=3495445

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1991/000044 WO1991013704A1 (fr) 1990-03-15 1991-03-14 Dispositif de pliage des toles

Country Status (7)

Country Link
EP (1) EP0476092B1 (fr)
JP (1) JPH04506182A (fr)
KR (1) KR920700792A (fr)
AT (2) AT393639B (fr)
DE (1) DE59101563D1 (fr)
RU (1) RU2015769C1 (fr)
WO (1) WO1991013704A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU657312B2 (en) * 1991-03-14 1995-03-09 Lift Verkaufsgerate-Gesellschaft mbH Sheet-metal bending device
CN109262267A (zh) * 2018-09-29 2019-01-25 青岛先楚能源发展集团有限公司 核电站换料水池水中折弯设备

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1395798B1 (it) * 2009-10-02 2012-10-19 G01 Com S R L Pressa piegatrice
EP2484460A1 (fr) 2011-02-02 2012-08-08 Luciano Gasparini Procédé de centrage et dispositif permettant de l'effectuer
EP2484459A1 (fr) 2011-02-02 2012-08-08 Luciano Gasparini Procédé de préhension et dispositif permettant de l'effectuer
AT514769B1 (de) 2013-09-02 2015-05-15 Trumpf Maschinen Austria Gmbh Biegemaschine, sowie Verfahren zum Biegen eines Blechwerkstückes
DE102017006218A1 (de) 2017-06-28 2019-01-03 Technische Universität Dortmund Vorrichtung und Verfahren zum Biegen von blechartigen Werkstücken bei gleichzeitiger Druckspannungsüberlagerung
WO2019188002A1 (fr) * 2018-03-30 2019-10-03 Ｊｆｅスチール株式会社 Procédé et dispositif pour plier un bord d'une plaque d'acier et procédé et équipement de fabrication de tuyau en acier
RU2741916C1 (ru) * 2018-03-30 2021-01-29 ДжФЕ СТИЛ КОРПОРЕЙШН Способ и устройство для гибки краев толстого стального листа и способ и установка для изготовления стальной трубы
CN112958655A (zh) * 2021-02-23 2021-06-15 南京川仁商贸有限公司 一种新能源设备用外壳成型装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649128A (en) * 1948-02-24 1953-08-18 Northrop Aircraft Inc Means and method of cold bending sheet metal
FR1221933A (fr) * 1958-02-06 1960-06-07 Matrice pour le pliage des tôles et matériaux analogues
US3282076A (en) * 1963-12-20 1966-11-01 Laval Turbine Brakes for forming plate or sheet workpieces
GB1119811A (en) * 1966-02-04 1968-07-10 Chambers John Improvements in or relating to bending machines
FR2201973A1 (fr) * 1972-10-06 1974-05-03 Verrina Spa
GB2050887A (en) * 1979-05-16 1981-01-14 Keeton Sons Folding machine
EP0379886A1 (fr) * 1989-01-18 1990-08-01 Rolf Haberstock Dispositif de matrice de pliage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649128A (en) * 1948-02-24 1953-08-18 Northrop Aircraft Inc Means and method of cold bending sheet metal
FR1221933A (fr) * 1958-02-06 1960-06-07 Matrice pour le pliage des tôles et matériaux analogues
US3282076A (en) * 1963-12-20 1966-11-01 Laval Turbine Brakes for forming plate or sheet workpieces
GB1119811A (en) * 1966-02-04 1968-07-10 Chambers John Improvements in or relating to bending machines
FR2201973A1 (fr) * 1972-10-06 1974-05-03 Verrina Spa
GB2050887A (en) * 1979-05-16 1981-01-14 Keeton Sons Folding machine
EP0379886A1 (fr) * 1989-01-18 1990-08-01 Rolf Haberstock Dispositif de matrice de pliage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU657312B2 (en) * 1991-03-14 1995-03-09 Lift Verkaufsgerate-Gesellschaft mbH Sheet-metal bending device
CN109262267A (zh) * 2018-09-29 2019-01-25 青岛先楚能源发展集团有限公司 核电站换料水池水中折弯设备

Also Published As

Publication number Publication date
AT393639B (de) 1991-11-25
RU2015769C1 (ru) 1994-07-15
JPH04506182A (ja) 1992-10-29
KR920700792A (ko) 1992-08-10
DE59101563D1 (de) 1994-06-09
EP0476092A1 (fr) 1992-03-25
ATA62190A (de) 1991-05-15
EP0476092B1 (fr) 1994-05-04
ATE105216T1 (de) 1994-05-15

Similar Documents

Publication Publication Date Title
EP0575393B1 (fr) Cintreuse pour toles
DE1939623A1 (de) Rotationsmaschine fuer die Herstellung von Eindruecken an Dosenmaenteln
EP0476092B1 (fr) Dispositif de pliage des toles
DE2318970C3 (de) Fliegende Schere oder Stanze für laufendes Material
WO2001051234A1 (fr) Dispositif monte sur une manivelle a coulisse, destine a produire un mouvement d'une partie montee sur le coulisseau par rapport a ce dernier
DE3134652C2 (fr)
CH658205A5 (de) Maschine zum kontinuierlichen abscheren und kaltstauchen des abgescherten teils, insbesondere ausgehend von drahtmaterial.
WO1992000154A1 (fr) Machine a plier et a former des feuilles de tole
DE3709018C2 (de) Vorrichtung zum Biegebearbeiten von Blechtafeln
DE2804107A1 (de) Verfahren und einrichtung zur verbindung aneinanderliegender materialschichten
DE1815027A1 (de) Roll-Schmiedemaschine
DE4034248A1 (de) Vorrichtung zum biegen von blech
DE3523557C2 (fr)
DE2258647A1 (de) Presse mit zwei um die eine bzw. andere von zwei parallelen drehachsen synchron rotierenden werkzeugtraegern
DE3512514C2 (de) Querwalzmaschine mit zwei geradlinig, hydraulisch angetriebenen Walzschlitten
DE10329949B4 (de) Heftapparat mit einem wenigstens einen Heftkopf tragenden Heftzylinder
DE1901325C3 (de) Fräsmaschine zur Nachformbearbeitung von sich drehenden Werkstücken
DE9213164U1 (de) Windeeinrichtung für Drahtform-Vorrichtungen, insbesondere Federwindemaschinen
DE1752739A1 (de) Maschine zur Kaltumformung von Rohren auf kleinere Durchmesser
DE489675C (de) Verfahren fuer das Fertigarbeiten der gekruemmten Arbeitsflaeche an Kraft uebertragenden Koerpern
DE1909625C3 (de) Streckschmiedemaschine mit mindestens zwei einander gegenüberliegenden Schwingbacken
EP1459815B1 (fr) Dispositif de pliage, en particulier pour des materiaux de profile en tôle
DE2055411C3 (de) Für verschiedene Grundkreisdurchmesser einstellbares Wälzgetriebe bei einer Verzahnungsmaschine für Evolventenverzahnung
EP0732294A2 (fr) Machine à faire des poches pliées
DE677354C (de) Maschine zum Formen, Einrollen, Bridieren usw. von Hutraendern

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1991906557

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1991906557

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1991906557

Country of ref document: EP