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
  • B21D7/00—Bending rods, profiles, or tubes
  • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
• • 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
  • B21D9/00—Bending tubes using mandrels or the like
  • B21D9/10—Bending tubes using mandrels or the like by passing between rollers

Definitions

• the present invention relates to a method and a device for profile bending of metal profiles (in particular also hollow profiles) according to the preamble of patent claim 1.
• the disadvantage of the known method is that an expensive pushing station must be used which is suitable for pushing the profile to be bent between the rotating driven bending rollers by means of high pushing forces (in the range of several tons) in order to achieve a corresponding deformation.
• rollers assigned to one another are not arranged to be displaceable in the X direction (longitudinal direction of the profile to be bent), but are fixed in a machine bed. This has the disadvantage that it is a self-contained machine that cannot be modified or combined. If you want to use other bending methods or bend in another way, you have to design a completely new machine, which is very expensive.
• the object of the present invention is therefore to provide a method and an apparatus for bending metal To further develop hollow profiles according to the preamble of claim 1 so that a universal machine is created with which it is possible to exchange individual bending stations for one another, to completely remove them or to arrange them in another way, with the aim of being universally usable
• the entire roll bending station consists of individual roll stations, of which each roll station has at least one roll that bears against the profile to be bent and that a different bending task is assigned to each roll station and that each roll station is also modularly interchangeable and adjustable and removable is arranged on a common machine body.
• a mandrel can be provided for supporting the profile on the inside thereof.
• the present bending machine is not only suitable for bending closed metal hollow profiles, but these hollow profiles can also be partially or completely open.
• a link mandrel or a mandrel shaft is carried in the (possibly partially open) cavity, which is held stationary in the bending area, so that the hollow profile to be bent is optimally supported in the bending area and against buckling, bulging or against any other deformation is protected.
• the core of the invention is therefore the modular structure, where a number of roller stations are adjustable and deliverable in the common machine body, and preferably the individual roller stations are arranged adjustable on so-called X / Y slides, it being sufficient for individual roller stations, only enable infeed in the Y direction, while adjustment in the X direction can be omitted.
• a so-called roll bending (left or right bending) by lying on one side of the hollow profile to be bent in the X-Y direction next to one another and adjustable at a mutual distance Bending station, a guide and rolling station and a support station are arranged.
• Each of the stations mentioned has at least one roller, it being left open whether all the rollers are driven in rotation or not.
• it is provided in any case that the roller of the bending station (bending roller) is not driven in rotation, while the rolling and guiding roller of the guiding and rolling station is driven in rotation and that the supporting roller of the supporting station is also not driven in rotation.
• a central roller station is arranged opposite this structure, which consists of a single, rotationally driven central roller, which is interchangeable and which can be replaced by other rollers of different diameters and profile shapes. This interchangeability also applies to the other roles - just mentioned above.
• the center roller of the center roller station is only adjustable in the Y direction and is arranged on an associated slide, so that the adjustment in the X direction can be omitted, while the other way round three roller stations mentioned above (bending station, support station, guiding and rolling station) are designed to be adjustable in the XY direction.
• the three mentioned roller stations are arranged at the top in the plan view, while the center roller station is arranged at the bottom. If, on the other hand, the profile is to be bent around to the right, then there is an exactly reversed arrangement, where the three named are
• the inlet side of the entire roller bending station can also be exchanged with the outlet side of the same roller bending station in order to achieve right or left bending.
• this also applies to the offset of the center roller station, which is just arranged on the lower side when bending to the left and is determined in the machine bed when bending to the right on the opposite (upper) side.
• a so-called core-roll bending is provided, again with two or three roller stations laying on one side of the profile, only the presence of two roller stations being preferred, of which one roller station is the guide and Rolling station and the other roller station is the support station, and that opposite these two stations, a core bending station is arranged, which has a rotatingly driven core, to which a clamping head is attached, which receives the front, free end of the profile to be bent.
• the profile is under one
• Torque is bent around the core by means of a tensile force which counteracts the rotation, the core rotating (winding process), the aforementioned roller stations ensuring that the profile is pressed cleanly against the core in the bending region.
• one or more sliding shoes are arranged between the roller stations mentioned, in order to prevent the profile to be bent between the roller stations mentioned from bulging or deforming.
• an important advantage of the invention is that practically only two there are mutually opposite, rotationally driven rollers, namely the rotationally driven roller of the guiding and rolling station, which is generally the middle roller of the three roller stations arranged on one side, while this guiding and rolling station is opposite a rotatingly driven middle roller of the middle roller station. Because these two rollers of the mutually opposite stations are driven in rotation, there is no need for an expensive pushing device, as was described with the subject of the older EP 492 211 B1. In this elaborately designed pushing station, extraordinary pushing forces in the range of several tons had to be applied, which was associated with a correspondingly high level of machine expenditure. It was also provided in EP 492 211 Bl that not only two rotating rollers were present, but that more than two rotating rollers were present, which was associated with a correspondingly higher machine outlay.
• this invention has the advantage that the forward drive of this profile to be bent can be set precisely via the delivery of the individual roll stations to the profile to be offered, which was not possible with the previously known machines.
• a slide is also present in the present invention, which lies against the back of the profile to be bent, and which is displaceably driven in a slide track on the machine body.
• this slide can only run with it, so that a thrust force is not exerted on the profile to be bent. With the moving carriage, however, an exact measurement is straight ME-ISRAKE to determine the length of the to be bent
• Measuring roller could never be arranged in the neutral bending area of the hollow profile to be bent, as a result of which the measurement result was already falsified. This is avoided with the invention in that the aforementioned X measuring system is arranged in the traveling carriage.
• the said carriage is otherwise intended for the fact that the profile can be pulled with the carriage in the opposite direction to its transport direction, i. H. compared to the drive of the roll bending stations, a tensile force is exerted on the profile to be bent, which is particularly the case with so-called core-roll bending.
• the said carriage also serves to facilitate the threading of a hollow profile to be bent into the
• Figure 1 Schematic of a device for roll bending a hollow profile in a first embodiment
• Figure 2 the perspective view of the device of Figure 1;
• Figure 3 is an enlarged view of the bending of the hollow profile in the roll bending station
• Figure 4 the same representation as Figure 3 with changed position of the roller stations
• FIG. 5 an embodiment of the machine for right-hand bending modified compared to FIG. 2;
• FIG. 6 shows a comparison of Figure 3 and Figure 4 modified from ⁇ guide die of the machine for roll bending in further detail
• Figure 7 the representation of Figure 6 when bending a frame
• Figure 8 a same representation as Figure 7 for bending a frame with small and large bending radii
• Figure 9 the function of the roll bending station when bending a circle
• Figure 10 the roll bending station according to the invention in the function of changing roll bending
• Figure 11 the same representation as Figure 10 with progressive bend
• Figure 12 the same representation as Figure 10 and Figure 11 with more advanced bending;
• FIG. 13 a perspective view of a machine for performing the interchangeable roll bending
• FIG. 14 the perspective view of a machine for core-roll bending
• FIG. 15 schematically shows the bending sequence for core-roll bending with a machine according to FIG. 14;
• Figure 16 a bend advanced compared to Figure 15;
• FIG. 17 a modification of a machine for core-roll bending
• FIG. 18 the representation according to FIG. 17 with a more advanced bend
• FIG 19 an embodiment modified from Figure 3 and Figure 4.
• Figure 20 a modification to Figures 15 to 18 with a different type of core that is centrally fixed.
• the machine according to the invention essentially consists of a roller bending station, generally designated 1, which consists of a series of roller stations.
• the roller bending station 1 consists of a bending station 17 arranged at the end to the bending profile 4, an adjoining, approximately centrally arranged guide and rolling station 15 and a downward supporting station 16.
• These roller stations 15 - 17 are on one side of the Bending profile 4 is arranged, while a center roller station 11 is provided opposite, which consists of a single, rotationally driven center roller 13.
• the profile to be bent is parallel to a slide track 2 above this, on which a slide 3 is arranged, which is designed to be displaceable in the X direction.
• a mandrel is arranged, which consists of a mandrel rod 7, which is connected via a coupling 10 to an associated drive of a mandrel station 5.
• a drive 6 for the carriage 3 is provided.
• a mandrel shaft 8 is arranged, on which a number of mandrel members 9 are attached.
• mandrel shape and design of the mandrel is not critical to the invention; a simple mandrel shaft with links or lamellae can also be used.
• each roller station is arranged on a separate X-Y carriage and the entire
• Roller stations deliverable and fixable in the XY direction are attached to the machine body 18.
• the X setting of the stations 15-17 depends on the size of the profile.
• the displacement in the Y direction is necessary in order to optimally design the bending process.
• the bending station 17 is assigned a slide 24 which is fixed in the XY direction on the machine body 18.
• a bending roller 27 is assigned to the bending station 17, a rolling and guiding roller 28 is assigned to the guiding and rolling station, and a supporting roller 29 is assigned to the supporting station 16.
• the individual stations 15 - 17 are designed to be adjustable and lockable in the X direction.
• the adjusting drives for setting the individual rollers 27 to 29 or stations 15-17 in the Y direction are not shown in more detail. This happens e.g. B. via hydraulic igniter or also via spindle drives.
• center roller station 11 is also of modular construction and is attached to the machine body 18, a drive 23 being provided for the rotational movement of the center roller 13 about the axis 12.
• FIG. 2 shows more clearly that the slide 3 is designed to be movable in the X direction on the slide track 2, a guide rope 21 being provided which is guided at the end over a deflection roller 59 which is fastened to the machine body 18.
• the movement of the carriage 3 is precisely implied with the drive of the two opposing rollers 28, 13, so that the carriage 3 therefore only runs along.
• FIG. 3 shows, compared to FIG. 1, an enlarged representation of the bending process when bending the profile to the left.
• Stations 15-17 are adjustable and lockable, and it is also important that the distance 35 between the individual stations 15-17 is also individually adjustable.
• the distance adjustment 20 in the X direction is carried out - as indicated previously - with the aid of the individual actuatable spindles 19 a, 19 c.
• the center roller 13 in the embodiment shown consists of a roller of smaller diameter, which is arranged between two disks 14 (FIGS. 1, 2) of larger diameter, the disks at least partially overlapping the profile to be bent from above and below and the diameter of the Center roll 13 creates on the side of the profile to be bent.
• a pressure 33 is provided by the middle rolling and guide roller 28 of about 50 kN, with a profile cross section in the range between 40 to 220 mm.
• this rolling and guide roller 28 is driven in the direction of arrow 30 ', while the central direction 13 is driven in the direction of arrow 30.
• FIG. 3 also shows that a relatively small central roller 13 can be replaced by a correspondingly larger central roller 13 '. This results in better bending qualities.
• Figure 4 shows, moreover, that with such an arrangement very tight radii with profile cross sections of z. B. 40 mm can be bent.
• 5 shows the module-like structure, where it can be seen compared to Figure 2, that only on the machine body 18, the stations 15 module-like - one of the were placed on the other side ⁇ 17 and also the center roller station 11 on the opposite side was repositioned.
• a slide 24 is provided for the bending station 17, a slide 25 for the guiding and rolling station 15 and a slide 26 for the support station 16. All of the slides mentioned can be set and locked in the X-Y direction.
• FIG. 6 and FIG. 7 Due to the measuring device shown, which is arranged in the slide 3 and allows an exact measurement of the profile to be bent in the X direction, it can now be seen from FIG. 6 and FIG. 7 that frames with round corners can also be bent very precisely. It is essential here that two opposing slide shoes 39, 40 are arranged between the roller and guide roller 28 and the support roller 29, which are fixed and are frictionally attached to the bending profile cross section from both sides.
• the lower slide shoe 39 acts as a wrinkle smoother, and the upper slide shoe 40 as a guide receptacle.
• Rolls of the different stations in the arrow directions 32 and 34 can be made adjustable.
• the stations mentioned are also designed to be adjustable in the direction of arrow 38 (Y direction), it being sufficient in the exemplary embodiment shown to make the middle station 11 adjustable only in the Y direction (infeed direction 38) during adjustment in the X direction is not required.
• the invention is not restricted to this; the invention can also be provided that the center roller station 11 is designed to be adjustable and lockable in X and Y.
• FIG. 8 shows, in comparison to FIG. 7, that it is not only possible to bend such a frame with straight profile sections due to the precisely carried out bending process, but curved profile sections 43 can also be provided.
• FIG. 9 shows, in comparison to FIG. 8, that with a corresponding setting of the individual roller stations 15-17 in connection with the central roller station 11, another one
• Full circle (curved profile section 44) can be bent.
• this full circle is also possible to form this full circle as a spiral, in which case it is additionally necessary to deflect the already bent, free end of the profile section 44 upwards via a guide plate which is arranged in the Z direction, so that a spiral bend is possible .
• roller stations are designed to be adjustable in the setting directions 42 and, in the rest, a pressure 33 is exerted on the profile to be bent by the central roller and guide roller 28 in the direction of the arrow shown.
• FIGS. 10 to 13 A so-called interchangeable roll bending is shown in FIGS. 10 to 13, whereby it can be seen that the central roller station 11 has now been removed due to the given modular structure and instead another module, consisting of the stations 15-17 of the one, is on the opposite side is arranged, as shown in Figures 10 and 11. Since the same modular parts are involved, the added modules are marked with a prime.
• the direction of the arrow 42 (setting direction) can be changed and since, depending on the desired bend, both the distance and the pressure of these bending rollers 27, 27 'are adjustable to the profile to be bent. This creates an exact guidance of the hollow profile to be bent.
• FIG. 12 shows the more advanced alternate bending process, it being recognizable that radii with different centers 45 a, b, c can be bent.
• the central roller 13 is therefore removed and instead the roller and guide roller 28 'are fixed on the machine body 18 in an adjustable manner.
• the other roles of the complementary stations namely the bending roller 27 'and the support roller 29', can then be used.
• rollers 27 ', 29' are in any case necessary because these rollers have to absorb the action forces that arise during the bending process.
• FIGS. 2, 5 and 13 show the universal applicability of the machine according to the invention.
• roller stations 15, 16 are present, to which the known and previously described rolling and guiding roller 28 and the supporting roller 29 are assigned.
• Rotationally adjustable with the m XY direction m of its axis 56 and m arrow 30 and m opposite direction drivable Core 50 is connected to a clamping head 52, which is the front, free
• the core bending station 46 consists of an X-slide 49 and a Y-slide 48, both of which can be adjusted separately from one another in the directions mentioned and which are fastened together on the machine bed 47, which is attached to the machine body 18 in a modular manner.
• FIGS 15 and 16 show further details of the device.
• a slide and guide shoe 54 is arranged between the rollers 28, 29, which frictionally engages on one side of the profile and thus for a high
• Bending quality ensures that it presses the profile 4 to be bent against the outer circumference of the core 50 which can be driven in rotation.
• the bending is carried out in the region of the axis of the roller 28, a pressure being additionally applied in the direction of the arrow 33. This can be seen in particular from FIG. 16.
• This pressure in turn has a rolling effect on this side of the profile, while the opposite side lies against the outer circumference of the core with less rolling work.
• the carriage 3 not only runs along and serves as a path measuring system, but it can also be displaceably driven in the arrow direction 51 shown in order to exert a tensile force in the arrow direction 51 on the free end of the profile to be bent.
• the slide thus exerts the tensile force described over the entire length of the profile to be bent in the connection area between the slide 3 and the clamping head 52.
• the profile is thus stretched by the tensile force described.
• the selection process described by the roller 28 and the stretching process described by the slide 3 favors the bending accuracy with the least possible deflection of the profile to be bent.
• FIGS. 17 and 18 show the use of another core 53, but otherwise the same explanations apply that were given with reference to FIGS. 15 and 16.
• the core can be driven in the direction of arrow 30 and in the opposite direction.
• the profile to be bent is brought into the position according to FIG. 18, the first corner 60 having already been bent.
• the clamping head 52 then opens, swivels its starting position back according to FIG. 17, closes, the carriage 3 is fed in the opposite direction to the arrow direction 51 drawn onto the profile up to the beginning of the corner 61; this is then bent according to FIG. 18. This process is then repeated until the last corner 62, which has just been bent in FIG. 18.
• FIG. 19 shows, as a further exemplary embodiment, the bending around a circular core 58, the same explanations as above apply.
• the clamping head 52 opens, travels back a part of the way, closes again and further bends the arc to 360 ° and beyond with the core 58 rotating, with an inclined
• machine body 18 and the module-like stations 15-17 attached to it mean a single machine, for example the right part of the overall machine according to FIG. 13 is realized.
• the machine body 18, 18 ' can therefore also be understood as a module.
• the saving then results from the fact that a single slide track 2 with a slide 3 and an associated mandrel station 5 and a corresponding drive 6 is nevertheless implemented for such a double machine body 18, 18 '.
• FIG. 20 shows as a further exemplary embodiment that it is not necessary to design the different rollers 27-29 of the individual roller stations 15-17 to be of the same size. To save space, it can be provided, for example, to make the middle rolling and guide roller 28 smaller and to make it adjustable only in the Y direction, while the other rollers 27 and 29 are designed to be adjustable in the X and Y directions.
• the roller and guide roller 28 is kept smaller, the slide on which the roller is seated and thus the entire guide and roller station 15 can be made significantly smaller and thus the center distances of the bending roller 27 and the support roller 29 to the axis of the Center roll 13 can be greatly reduced.
• this exemplary embodiment shows that the slide 3 is not only adjustable and drivable in the X direction, it can also be designed to be adjustable in the Y direction.
• mandrel station 5 which is also adjustable in the Y direction and adjustable in the X direction.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)
• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
• Shaping Of Tube Ends By Bending Or Straightening (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=7827716

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (24)

Family Cites Families (13)

• 1997
  • 1997-04-25 DE DE19717472A patent/DE19717472A1/de not_active Withdrawn
• 1998
  • 1998-04-23 ES ES98922769T patent/ES2210758T3/es not_active Expired - Lifetime
  • 1998-04-23 US US09/214,028 patent/US6189354B1/en not_active Expired - Fee Related
  • 1998-04-23 DE DE59809960T patent/DE59809960D1/de not_active Expired - Fee Related
  • 1998-04-23 WO PCT/EP1998/002418 patent/WO1998048957A1/fr active IP Right Grant
  • 1998-04-23 AT AT98922769T patent/ATE252428T1/de not_active IP Right Cessation
  • 1998-04-23 EP EP98922769A patent/EP0910486B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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