DE102011013441A1 - Bending apparatus for bending long profile e.g. tube, has upper tool unit and/or lower tool unit whose pivot axis is synchronized with change of inclination in circular path is displaced about rotational axis - Google Patents

Abstract

The bending apparatus has an upper tool unit (2) and a lower tool unit (3) which are relatively moved and are arranged to form bending deformation (17) over which bending portion of elongated profile (19) can be provided. The upper tool unit and/or lower tool unit about a pivot axis (Y1) is varied in its inclination and the pivot axis is synchronized with the change of the inclination in a circular path is displaced about a rotational axis (Y). Independent claims are included for the following: (1) bending installation; and (2) method for bending long profile.

Description

The invention relates to a bending device for bending a long profile, in particular a pipe according to the features in the preamble of claim 1 and 8 and a bending system with at least two such bending devices according to the features of claim 12 and a method for bending a long profile, in particular a pipe, according to the features of claim 17.

Individually curved long profiles receive their bending form as part of a forming manufacturing process. Compared to the conversion of flat semi-finished products, such as sheets, but this can not be done by means of folding or crimping, since such a sharp-edged bending leads to unwanted local cross-sectional changes up to kinking. To avoid such impairments and cross-sectional weakening, the profiles to be bent are bent specifically only in bending line.

In particular, it requires the bending of hollow profiles that are prone to bending, such as pipes, a corresponding bending device. Only in this way is an approximately constant cross-sectional course ensured in the region of the bending sections to be created.

The FR 2 922 127 B1 discloses such a bending device for bending a pipe comprising an upper tool unit and a lower tool unit. The tool units, which are movable relative to one another, have a forming region which predetermines the bending form, via which at least one bending section can be produced on the long profile.

The device is particularly suitable for the bending of pipes, which are to receive one after the other in the opposite direction extending bending sections. While a section of the tube is encompassed by the tool units and so a part of the tube is wound around the forming region predetermining the bending shape, a positive guide arranged opposite the forming section ensures that the tube is applied to the forming area. While a pipe section is wound around the forming area, the forced guide abuts the pipe circumferentially and follows its longitudinal movement. As a result, a damage to the surface of the tube relative movement between the tube and the guide is prevented.

Due to the design, the individual bending sections must be produced one after the other. In particular directly successive bending sections are also not feasible because either the only linearly displaceable positive guide or the pipe encompassing area of the tool units require a straight line between the bending sections of the tube.

The DE 44 00 579 C1 also shows a bending device for bending a long profile, which comprises an upper and a lower tool unit. The tool units are movable relative to each other, wherein they engage around the inserted long profile at least in sections in a closed state. The two tool units have a forming region that predetermines the bending shape, over which all bending sections can be produced on the long profile.

In the contact areas between the long profile and the forming area of the tool units occur during bending caused by bending shortening relative movements. In combination with the circumferential deformation pressure, the surface of the long profile is at least partially stressed. In particular, when bending thin-walled tubes, the resulting grooves and injuries within the surface lead to local weakening of the entire finished component.

Against this background, the design of bending devices and their rational use still offers room for improvement. The present invention is therefore based on the object to improve a bending device to the effect that directly following one another bending sections locally on a long profile, in particular on a pipe without relative movements in the contact area between the tool units and the long profile can be produced and a way to show a complex Produce component with multiple bending sections within a short time without the surface of the long profile injuring relative movements. In addition, it is an object of the invention to provide a method for bending a long profile, in particular a pipe, which is accompanied by the relative movements without the surface of the long profile.

The solution of the objective part of the task is carried out according to the invention in a bending device according to the features of claim 1 and 8 and in a bending system according to the features of claim 12. The procedural part of the object is achieved according to the invention by the measures according to claim 17.

Advantageous embodiments of the basic concept of the invention are the subject of the dependent claims 2 to 7 and 9 to 11 and 13 to 16. Vorteilhafte Ausgestaltungen der The method according to the invention is the content of the dependent claims 18 to 22.

A bending device for bending a long profile, in particular a pipe, which comprises an upper tool unit and a lower tool unit, is shown. The upper and lower tool units are movable relative to each other. The upper tool unit and / or the lower tool unit have / has at least one forming region that predetermines the bending form. At least one bending section can be produced on the long profile via the forming area. According to the invention, a part of the upper tool unit and / or the lower tool unit can be changed in its inclination about a pivot axis, wherein the pivot axis is displaceable in synchronism with the change of the inclination on a circular path about an axis of rotation spaced from the pivot axis.

Due to the combined movement of inclination about the pivot axis and simultaneous displacement of the pivot axis on the circular path about the rotation axis, a rolling of the inherently rigid part of the upper and / or lower tool unit on the long profile to be bent is made possible. In this way, a relative movement in the contact area between the part of the upper and / or lower tool unit and the surface of the long profile is excluded because of the rolling on the long profile during the bending process part of the upper and / or lower tool unit only a continuous punctiform and / or linear contact along of the bending section. The resulting between the surface of the long profile and the rolling on the long profile part of the upper and / or lower tool unit resulting contact shape is dependent on the particular design and the cross-sectional shape of the long profile.

If the part which rolls on the long profile is adapted to the cross-sectional shape of the long profile, a linear contact occurs continuously transversely to the longitudinal direction of the long profile. If the part of the upper and / or lower tool unit rolling on the long profile is not adapted to the cross-sectional shape of the long profile, a corresponding pointwise continuous contact is established which, due to the smaller area, causes a higher load during the bending operation compared to the linear contact.

The length of the thereby rolling on the long profile part of the upper and / or lower tool unit corresponds over its contact area to the long profile away at least the outer peripheral length of the bending section to be formed. The long profile to be bent can have a wide variety of cross-sectional shapes, for example, triangular or polygonal, round, oval and a combination of the above. The use of the bending device is not limited to the use of the here exemplified cross-sectional shapes of a long profile. In principle, the long profile to be bent can be a solid cross section or a hollow profile, in particular a tube.

Since the part of the upper and / or lower tool unit embodies the movable shape of a positive guide, which bends the long profile into the forming area during bending, a further bending section can be formed directly on the curvature of an already produced bending section. This is due to the fact that the inherently rigid part of the upper and / or lower tool unit is movable and has no region encompassing the long profile. As a result, no straight course of the long profile are necessary, which must be embraced to bend the long profile or created on a linear guided positive guidance. In this way, a further bending section can be formed directly after an existing bending section. Advantageously, a plurality of bending operations are performed on a long profile, wherein the long profile for each individual bending section is inserted into a dedicated bending device. Here, the successive bending sections do not have to be in the same plane, but can be bent, for example offset against each other.

Advantageously, a part of the upper tool unit and / or the lower tool unit forms a bending unit, which is displaceable over the curved course of the forming area in the form of a pass of the curvature. As a result, the motion sequence of the bending unit combined from the inclination about the pivot axis and simultaneous displacement of the pivot axis on the circular path about the rotation axis is optimized, so that over the entire contact region of the bending unit to the surface of the elongated profile a relative movement between them is excluded. As a result, during the unwinding of the bending unit on the long profile, a continuous point and / or line contact is achieved over the entire course of the bending section, which has no thrusting movements between the bending unit and the long profile during bending.

Parts of the upper and lower tool unit may form a common clamping unit. The clamping unit is intended to fix the long profile at least in sections during bending within the bending device. Here, the protruding from the clamping unit part of the long profile is at least partially to Forming determined. The clamping unit is stationary in or arranged on the bending device, since a tracking of the long profile in the forming area is not necessary inside. Also, there is no relative movement between the long profile and the clamping unit, since the section of the long profile intended for bending is already completely outside the clamping unit and is not passed through the clamping unit or past it during bending.

Advantageously, the clamping unit is adapted to the respective cross-sectional shape of the long profile to be bent. If the long profile has a round cross section, the clamping unit forming parts of the upper and lower tool unit may at least partially each have a groove in the form of a matched to the cross section of the long profile half channel. During the closing of the tool units, the two half-channels then complete to a channel enclosing sections of the long profile.

In order to protect the surface of the fixed long profile, the grooves in the clamping unit may have a corresponding insert or a corresponding lining with yielding properties. The clamping unit is designed so that the inserted into the bending device long profile is already fixed before bending and is released again after bending.

Furthermore, an analogous to the forming area curved guide section is provided. The guide section can be arranged, for example, on the upper and / or lower tool unit. Along the guide section, the bending unit is mounted shear-resistant. The curvature of the guide section is adapted to the curvature of the deformation area. The curvatures can have the same radius. The curvatures of the guide portion and the forming area then have an identical origin of their radii. In any case, the bends and the bending unit are coordinated so that the bending unit is displaceable in the form of a tangent of the outer curvature of the bending section to be produced on the long profile. For a space-saving design of the bending unit of the guide section is disposed immediately adjacent to the forming area.

The bending unit itself has a guide rail. Although the guide bar may have a curved course, this is preferably formed straight. About the guide bar, the bending unit is positively and / or non-positively coupled to the guide portion. In an advantageous manner, the bending unit is meshed with the guide section via the guide strip. The guide portion may have the partial circumference of a gear, while the guide bar is formed as a toothed cross-gear rack. The mutually corresponding toothing between the guide portion and the guide bar allows their permanent shear-resistant coupling with each other. The teeth can be straight or obliquely toothed.

In principle, the guide rail and the guide section can also be coupled to one another via suitable surfaces having a high degree of static friction between them. For example, the curved guide section can have a smooth, rubberized surface, while the guide strip either also has a smooth rubberized or, for example, metallic surface. The surfaces may, for example, also have a structure which increases the static friction.

The length of the guide bar corresponds to at least one circumferential length of the guide section. As a result, a rolling of the bending unit over the entire length of the guide rail is made possible.

Preferably, the bending unit and / or the clamping unit forming parts of the upper and lower tool unit in a closed state at least partially shear-resistant coupled to each other. As a result, only a part of the upper and / or lower tool unit must be actively moved because the shear-resistant coupling with the other part then change them as a unit in their position. Due to the shear-resistant coupling, only a part of the upper and / or lower tool unit can have a guide strip, in order nevertheless to be guided as a unit. Advantageously, the coupling is activated during the closing of the upper and lower tool unit and decoupled when they are opened again. The coupling of the parts can be done, for example, positive and / or non-positive. For a positive connection, the parts may have a corresponding contour, which, for example, in the bending unit, at least in their directions of movement causes a coupling of the bending unit forming parts of the lower and / or upper tool unit. The coupling can also be done via a temporary pinning of the parts. In principle, the coupling of the parts can also be done only after closing the upper and lower tool unit.

As an alternative to this, the invention provides that the upper tool unit and / or the lower tool unit have / have a contour area which is contoured to the curvature of the deformation area. The contour area is displaceable in a closing direction of the upper and lower tool unit, the forming area being synchronous with the displacement of the contour area in one is displaceable perpendicular to the closing direction extending tracking.

The long profile inserted into the bending device receives at least one bending section, which is formed between the forming area and the contour area. Due to the combination of lowering movement of the contour area with simultaneous lateral displacement of the forming area, the bending section to be created is formed successively between its respective ends from the forming area to the contour area. As a result, a relative movement between the forming area and / or the contour area and the long profile which damages the surface of the long profile is prevented. In addition, immediately consecutive bending sections can be produced.

Advantageously, both in the forming area and in the contour area on the cross section of the long profile adapted recesses are arranged, in which the long profile is at least partially embedded. In principle, the recesses can also be arranged in the form of a single groove within the forming area and / or contour area. Advantageously, the groove is arranged in the forming area and the contour area, so that a complete, at least the bending portion encompassing channel is formed only when fully closed upper and lower tool unit. Through the side walls of the channel to be bent long profile is at least partially supported laterally parallel to the plane of the bend. Thus, the groove serves the cross-sectional preservation of the long profile in its bending sections. If a possible change in cross-section within the bending section is desired, the grooves arranged in the forming area and / or contour area can naturally also have a corresponding configuration.

Preferably, parts of the upper and lower tool units form a common clamping unit. The clamping unit is intended to fix the inserted long profile at least in sections during bending in its position. Here, the protruding from the clamping unit part of the long profile is determined at least in sections for forming. In addition, there is no relative movement between the long profile and the clamping unit, since the portion of the long profile intended for bending is already completely outside the clamping unit and is not passed through the clamping unit or past it during bending.

Advantageously, the clamping unit is adapted to the respective cross-sectional shape of the long profile to be bent. If the long profile has a round cross-section, the clamping unit forming parts of the upper and lower tool unit may at least partially each having a groove in the form of a half-channel. During the closing of the tool units, the two half-channels then complete to a channel enclosing sections of the long profile. For a desired change in cross section of the long profile within the clamping unit, the grooves can be designed accordingly.

In order to protect the surface of the fixed long profile, the grooves in the clamping unit may have a corresponding insert or a corresponding lining with yielding properties. The clamping unit is designed so that the inserted into the bending device long profile is already fixed before bending and is released again after bending. In principle, the actual fixation of the long profile can only begin with the bending process or be activated shortly after its beginning. In an activated after the beginning of bending fixation of the long profile within the clamping unit, this supports the actual bending process in which the long profile is bent both adjacent and within its bending section to be formed to the respective contour of the forming area and / or contour area around.

In a preferred embodiment, the clamping unit is arranged displaceable in the direction of tracking. As a result, the long profile is tracked parallel to its transformation from at least one side in the direction of its bending section to be formed. By moving the clamping unit and the portion of the long profile fixed therein, the bending shortening that occurs during the bending process is compensated for in the direction of tracking.

The clamping unit forming parts of the upper and lower tool unit are in a closed state at least partially shear-resistant coupled to each other. As a result, only a part of the clamping unit has to be displaced in the tracking direction, since the part coupled thereto follows the movement of the other part and the clamping unit is thus displaceable in total. The coupling can be done, for example, positive and / or non-positive. For this purpose, the parts can have contours which correspond to one another and through which a coupling takes place, at least in the tracking direction.

The illustrated bending device allows the bending of a long profile without its surface damaging relative movements. Due to the coordinated and coordinated movements of individual components within the bending device, find no thrust movements in the contact area between the long profile and the bending device instead. In particular, by the elimination of the long profile during bending leading components, directly behind one another arranged bending sections can be produced.

In the following, a bending system for the three-dimensional pre-emergence of a long profile, in particular of a tube, is shown, which comprises at least two of the previously described bending devices.

According to the invention, at least two bending stations are provided, wherein each individual one of the bending stations has at least two of the previously described bending devices. The arrangement of the at least two bending devices is provided so that at least two bending sections can be produced at the same time on the long profile in each bending station. In this way, two directly adjacent bending sections can be produced in which the bending devices are arranged in the longitudinal direction of the long profile directly adjacent to each other.

The invention provides that the long profile is formed from both sides at the same time by the arrangement of the two bending devices within a bending station. In this way, a bending mold can be produced, the individual bending sections are not successive, but at the same time malleable. The bending mold can also be mirror-symmetrical, for example. Compared to the use of a single bending device, the time required for bending thus reduced by at least 50%. In principle, the bending devices can also produce differently configured bent sections of the long profile, which can also be realized at the same time.

Preferably, a manipulator is arranged, which is intended to insert the long profile in at least one of the bending devices and / or to remove from at least one of the bending devices. In this case, the manipulator can be designed, for example, for a linear transport. The manipulator can also perform only a single pivoting movement over which the respective bending device with the long profile is loading or unloaded. Advantageously, the manipulator has more than one degree of freedom, so that the long profile can also be inserted into or removed from individually arranged bending devices and removed. The manipulator may be a robot.

The invention provides that the long profile can be transferred by the manipulator between at least two bending stations. As a result, at least two bending sections can be produced at the same time on the long profile, which is subsequently transferred by the manipulator into the next bending station and there receives further bending sections. The resulting bending station can be immediately equipped with another long profile to be formed. By the parallel use of the bending devices and the immediate onward transport after production of the bending sections to the next bending station high cycle times are achieved, whereby an individually shaped long profile can be realized within a short time.

Advantageously, at least one sensor is arranged, which is intended to detect the position of the long profile within the bending devices. The position information thus obtained can be transmitted, for example, mechanically, preferably electrically, in particular digitally. In principle, the information can be transmitted via physical lines, for example as a light guide or via radio.

By the sensor, both the bending process and a possibly incorrectly inserted long profile within the bending device can be detected. In this way, the rejects can be reduced to a minimum since, for example, incorrectly inserted long profiles can be corrected in their position before the actual bending process begins. By way of example, it is also possible to detect, via the sensor, flexing or even damaging layers and configurations of the long profile that might impair the bending devices.

Preferably, at least one of the bending devices can be manipulated directly or indirectly in its adjustable bending parameters by position information acquired by the sensor. In combination with controllable actuators, it is thus possible to make individual adjustments to the bending device that affect the result of the bending. As a result, a desired-actual comparison of the individual bending forms is made possible, whereby both the individual bending devices and the individual bending stations can be adapted to changing parameters. Advantageously, both the detection and processing and control of the actuators is automated, so that a self-regulating bending device and / or bending station is realized.

The procedural part of the object is achieved by a method for bending a long profile, in particular a tube, in which the long profile is first inserted into a bending device and at least partially fixed via a clamping unit. In order to obtain the desired bending shape, a bending section of the long profile is bent around a curved forming region of the bending device, in which the long profile by means of a bending unit at least is partially displaced from its position. According to the bending unit is bent during bending about a pivot axis. In synchronism with the change in inclination of the bending unit, the pivot axis of the bending unit is displaced on a circular path about an axis of rotation.

The rotation axis is in this case spaced from the pivot axis. Due to the mutually synchronous change in inclination and displacement of the bending unit on a circular path, the surface of the long profile undergoes no impairment during bending due to any relative movements.

Such relative movements between the surface of the long profile and the bending device occur when those, the long profile displacing from its position bending unit is displaced only about an axis of rotation around. The axis of rotation forms the center of the curved forming area. The reason for the relative movements are the different distances of the long profile and the bending unit to the axis of rotation. The resulting different circumferential lengths cause the bending unit to be displaced over a longer inclined distance during the bending operation, whereby it is displaced along its surface in the contact area to the long profile. As a result of the coupling according to the invention of the inclination and displacement movement of the bending unit, it rolls off tangentially on the surface of the long profile, without any relative movement that offsets the surface.

Advantageously, the bending unit is displaced during the bending over the curved course of the forming area in the form of a pass of the curvature. This results in an ideal contact region between the bending unit and the surface of the long profile, whereby relative movements between them are avoided and the long profile has successively through a over the entire bending portion away a tangential contact with the bending unit. A reversal of movement of the individual components makes it clear that the forming area, together with the long profile, is moved on the bending unit more or less like a rolling wheel. Basically, in this case, the bending unit is unrolled during bending on an outer circumference of the bending section, whereby a portion of the workpiece located outside the bending section is displaced out of its position via a non-contact contact with the bending unit. In this way, the portion of the long profile lying outside the bending section to be created is guided over the entire bending process without any relative movements with respect to the bending unit. Alternatively, starting from its opposite ends, the bending section is successively bent into the forming area. In this case, the bending section is not, as usual, bent on one side starting in succession, but produced directly from its opposite ends starting from the center. As a result, any relative movements between the forming area and the bending device as a whole and the surface of the long profile are avoided.

Preferably, a fixed in the clamping unit part of the long profile is tracked smoothly during the bending of the bending section. The targeted tracking compensates for the bending shortening occurring during the bending process within the bending section. Depending on the configuration of the forming area thus any relative movement between the long profile and the bending device itself is prevented.

In a preferred manner, an intermediate section of the long profile located between the bending section and a further bending section is displaced from its position during bending by means of a punch. In this way, two spaced apart S-shaped bent portions can be produced at the same time, wherein the intermediate portion of the long profile located between the bending sections is displaced parallel to the bending operation of the bending sections from its location in the longitudinal direction of the long profile. The intermediate portion of the long profile is displaced parallel to the longitudinal direction of the long profile over the stamp from its position. If the opposing bending sections have a different configuration, the intermediate section of the elongated profile located between the bending sections can also be inclined and / or pivoted during its displacement in order to prevent any relative movements between the long profile and the bending device.

Overall, the invention creates an extremely flexible possibility for producing individual bending sections on a long profile, wherein surface damage to the component to be bent is prevented by the avoidance of relative movements. Depending on the configuration, at least one of the bending devices may include a cooling device, whereby a previously heated long profile within the bending device is curable. In principle, the long profiles to be bent can also be processed in a tempered state in order to simplify the bending process.

Alternatively, long profiles, which are a hollow profile, can also be supported with an internal mandrel during bending, if necessary. Especially when bending thin-walled pipes The bending process can also be carried out as a hydroforming process. In order to obtain the desired bending shape, the individual bending sections are sometimes over-bent on the long profile, whereby its spring-back behavior is taken into account. For this purpose, in particular bending devices are used, the bending unit are adjustable in its pivot radius.

The present invention is described below with reference to some schematically illustrated embodiments. Show it:

1 a bending device according to the invention in a perspective representation;

2 Parts of the bending device 1 in a side view;

3 a variant of the bending device 1 in self-presentation;

4 an alternative variant of the bending devices of the 1 and 3 in self-presentation;

5 a system structure of a plurality of bending devices of 1 . 3 and 4 in self-presentation;

6 a three-dimensionally shaped long profile in perspective representation as well

7 individual intermediate stations of the shaping of in 6 illustrated bending shape of the long profile in the same representation.

1 shows a bending device according to the invention 1 , which is an upper tool unit 2 and a lower tool unit 3 includes. The upper and lower tool unit 2 . 3 are movable in a closing direction X relative to each other. The upper tool unit 2 is incorporated into a forming machine, not shown, for example, a press, whereby they contactless above the lower tool unit 3 is arranged.

The upper tool unit 2 has a push head 4 and a hold-down spaced therefrom 5 on. The push head 4 and the hold-down 5 are over two telescopic connectors 6 , For example, nitrogen springs, interconnected. The telescopic connectors 6 allow a linear degree of freedom, so the pusher head 4 and the hold-down 5 in the closing direction X are relatively displaceable.

The hold down 5 has a perpendicular to the closing direction X extending structural axis of rotation Y, to this a swivel head 7 swiveling with the hold-down 5 connected is. In addition to the connection to the downholder 5 points the swivel head 7 a connection to the push head 4 over a push rod 8th on. The push rod 8th is at both ends with both the push head 4 as well as with the swivel head 7 connected. The articulated connection of the push rod 8th takes place via end-side axes, which are parallel to the axis of rotation Y of the swivel head 7 extend.

The push rod 8th includes a threaded rod 9 and a sleeve-like pressure body 10 where the threaded rod 9 via an external thread in the pressure hull 10 is screwed. This is the push rod 8th adjustable in length, which directly affects the inclination of the swivel head 7 effect. To block unwanted rotation between the threaded rod 9 and the pressure body 10 is a locknut 11 on the threaded rod 9 arranged, which against the pressure hull 10 stressed. As a result, the friction forces in the thread flanks are increased, thus the threaded rod 9 secured against twisting. That the swivel head 7 opposite end of the push rod 8th is in a direction parallel to the closing direction X extending groove 12 the push head 4 slidably mounted. The embodiment provides that a relative movement of the push head 4 in the direction of the hold-down 5 not directly via the pivoting movement of the swivel head 7 causing push rod 8th is transferred, but only after the end-side leadership of the push rod 8th an end stop inside the groove 12 reached.

Basically, the transmission of the swivel head 7 shifting forces from the pusher head 4 not limited to the illustrated embodiment. For example, the power transmission can also take place by connecting rods, a corresponding gear and the combination of a gear and a rack. Also conceivable is the use of a wedge slide and the direct control via a hydraulic unit.

The hold down 5 points in the area of the Schwenkopfes 7 a curved guide section 13 which extends on a circular path about the axis of rotation Y. Here is the guide section 13 end of a leg of the substantially U-shaped hold-down 5 arranged, with the swivel head 7 around the guide section 13 is pivotable around. Between the hold down 5 and the swivel head 7 is a bending unit 14 arranged on the curved guide section 13 is stored. The bending unit 14 has a square configuration, wherein a center of the guide portion 13 facing side of the bending unit 14 a groove 15 is arranged. The groove 15 is semicircular in cross section.

With respect to the lower tool unit 3 this first has a stationary base 16 over which the lower tool unit 3 connected to a non-illustrated background. On the pedestal 16 opposite top of the lower tool unit 3 is a curved forming area 17 arranged, whose curved course that of the guide section 13 the upper tool unit 2 equivalent. Analogous to the bending unit 14 also has the forming area 17 a groove 18 which is due to the curved course of the forming area 17 extends. The groove 18 of the forming area 17 also has a semi-circular cross section, which in combination with the groove 15 the bending unit 14 completed to a circular channel.

Between the upper tool unit 2 and the lower tool unit 3 is a long profile intended for bending 19 inserted in the form of a tube. The long profile 19 extends in its longitudinal direction Z, wherein it is with its half cross-sectional area in the over the curved forming area 17 also extending groove 18 is inserted. The above the forming area 17 out extending part of the groove 18 is formed in a straight line and forms together with a non-illustrated part of the upper tool unit 2 , closer to the hold-down 5 a common clamping unit 20 , Through the clamping unit 20 is the long profile 19 by a closing operation of the upper and lower tool unit 2 . 3 fixed in his position.

2 represents the upper tool unit 2 without the swivel head 7 This is the view of the guide section 13 and the subsequent storage of the bending unit 14 clarified. The illustration shows that the curved guide section 13 has a circumferential toothing. In this case, the guide section forms 13 a gear sector, which corresponds to the quarter of a gear in this embodiment. Furthermore, also has the with the guide section 13 in contact area of the bending unit 14 a toothing in the form of a guide rail 21 on, which is rectilinear along the bending unit 14 extends. A length L1 of the guide rail 21 corresponds to a circumferential length 12 of the guide section 13 , The tangential contact of the bending unit 14 and the guide section 13 forms a parallel to the axis of rotation Y extending pivot axis Y1, wherein the bending unit 14 can be changed in its inclination around the pivot axis Y1, while the pivot axis Y1 moves parallel to the change in inclination on a circular path about the rotation axis Y around. The circular path is thereby by the curved course of the guide section 13 educated.

The representation of the push head 4 of the 2 clarifies that the push rod 8th about their end-side storage along the groove 12 of the swivel head 4 over a height H of the groove 12 is displaceable parallel to the closing direction X.

3 represents an alternative bending device 1a as a variant of in 1 shown bending device 1 During the bending device 1 of the 1 a between the closing direction X and the longitudinal direction Z of the long profile 19 has exciting vertical bending plane, the bending device works 1a of the 3 in a perpendicular and thus horizontal bending plane.

The bending device 1a has an upper tool unit 2a and a lower tool unit 3a on, which are movable relative to each other in the closing direction X. The lower tool unit 3a is on a pedestal 16a stored in the form of a base plate, whereby it is fixedly connected to a substrate, not shown. Parts of the upper and lower tool unit 2a . 3a form a clamping unit in the closed state 20a , which is a section of the inserted long profile 19 fix. At the same time, parts of the upper and lower tool unit form 2a . 3a in the closed state, a bending unit 14a , which tangentially on a forming in the closed state forming area 17a is pivotable. Made up of parts of the upper and lower tool unit 2a . 3a forming bending unit 14a is changeable about the pivot axis Y1 in its inclination, said pivot axis Y1 is displaceable in synchronism with the change of the inclination on a circular path about the rotation axis Y around.

The upper and lower tool unit 2a . 3a are in the closed state of the bending device 1a about individual bolts 22 pinned together. Bolts 22 grip in the closed state of the bending device 1a thereby in not shown depressions in the upper tool unit 2a , with the bolts 22 in the lower tool unit 3a are arranged. Bolts 22 as well as the recesses extend parallel to the axis of rotation Y and cause a positive connection of the individual parts. The bending unit 14a points in the opposite edge areas of the upper and lower tool unit 2a . 3a a groove 15a on, which represents a four-circle in each cross-section. Also the forming area 17a has the edge of the forming area 17a forming parts of the upper and lower tool unit 2a . 3a a cross-sectionally quadrilateral groove 18a which extends over the curved forming area 17a extends straight.

The grooves 15a . 18a the bending unit 14a and the forming area 17a form in the closed Condition of the bending device 1a a half channel, which after the pivoting of the bending unit 14a completed to a channel with a fully circular cross-section. To the clamping unit 20a down, grooves complement each other 15a . 18a the bending unit 14a and the forming area 17a regardless of the pivoting of the bending unit 14a to a respective semicircular in cross section groove, which in the closed state of the bending device 1a form a circular cross-section channel. This is already when closing the bending device 1a the inserted long profile 19 in the area of the clamping unit 20a fixed within the trained channel.

On one of the forming area 17a opposite side of the upper tool unit is in extension of the forming area 17a a likewise curved guide section 13a arranged, which with one on the bending unit 14a arranged guide rail 21a corresponds. Both the guide section 13a , as well as the guide bar 21a each have a toothing, which mesh together. Due to the toothing is the bending unit 14a tangential to the forming area 17a displaced.

4 also provides a bending device 1b which is opposite to the bending devices 1 . 1a of the 1 and 3 no swiveling bending unit 14 . 14a , having. Furthermore, compared with the bending devices 1 . 1a of the 1 and 3 directly in pairs opposite bending forms are created. The bending device 1b has an upper tool unit 2 B and a lower tool unit 3b on. The lower tool unit 3b is on a pedestal 16b stored in the form of a base plate. Parts of the upper and lower tool unit 2 B . 3b are each as a jaw 23 formed, which in an at least partially closed state of the bending device 1b in pairs a clamping unit 20b form. The bending device 1b includes two clamping units 20b which the inserted long profile 19 engage around spaced apart sections.

The clamping units 20b are in a manner not shown on the base 16b in a direction parallel to the longitudinal direction Z of the long profile 19 extending tracking direction A relative to each other displaceable. Between the jaws 23 the lower tool unit 3b is a table 24 stationary on the pedestal 16b arranged. The clamping units 20b are from the table 24 spaced and can be moved in Nachführrichtung A on this. On a pedestal 16b opposite side of the table 24 indicates the upper tool unit 2 B a stamp 25 on, which in the here perpendicular to the longitudinal direction Z of the long profile 19 extending closing direction X is displaced. The movement dependencies of the individual components are designed so that the displacement of the punch 25 in the closing direction X with the respectively perpendicular thereto opposing displacements of the clamping units 20b in tracking direction A are synchronized.

The jaws 23 the lower tool unit 3b Show on their table 24 each side facing a curved forming area 17b on. The forming area 17b has two opposite curvatures, so that the forming area 17b each having an S-shaped curvature. The Stamp 25 indicates to its the clamping units 20b facing corners in each case to the curvature of the forming area 17b contoured contour area 26 on. The two contour areas 26 of the stamp 25 are in the longitudinal direction Z of the long profile 19 spaced apart. The inside of the lower tool unit 3b located forming area 17b has a shape adapted to the curvature groove 18b on. The groove 18b has a semicircle in cross section, wherein the groove 18b over the forming area 17b form-fitting in the table 24 extends. In a contracted in Nachführrichtung A state of the clamping units 20b the groove extends 18b thus of a forming area 17b over the table 24 up to the opposite forming area 17b ,

Analogous to the groove 18b also have the contour areas 26 of the stamp 25 a groove 27 on, which is also between the two contour areas 26 over the stamp 25 extends. The groove 27 also has a semicircular contour in cross-section, wherein in a completely closed state of the bending device 1b the grooves 18b . 27 together form a circular channel, which is the inserted long profile 19 encloses peripherally. The contours of the grooves 18b . 27 extend in a manner not shown in the jaws 23 into it, which the clamping units 20a form.

The embodiment of the bending device 1b Foresees that the stamp 25 along with its contour areas 26 in the closing direction X is displaced and the opposite clamping units 20b with their forming areas 17b synchronous to the relocation of the stamp 25 are displaceable in the direction perpendicular to the closing direction X tracking direction A.

5 shows the perspective view of a bending machine 100 , which several benders 1 . 1a . 1b includes. Inside the bending machine 100 goes through the long profile 19 in a flow direction B various bending processes to obtain its final bending shape. As in the presentation of 5 to recognize, are thereby individual benders 1 . 1a to common bending stations 101 . 102 . 103 summarized. Inside the bending machine 100 are in particular the bending devices 1 having a vertical bending plane within a bending station 101 mirrored to each other arranged to a rectified bending of the long profile 19 to enable. The last in bending direction B bending station 103 also has the bending plane having a vertical bending plane 1 on, which are arranged rectified.

6 clarifies the bending shape of the long profile to be produced 19 , This has in the final result a plurality of bending sections C-G, which mirror-symmetrically along the long profile 19 are arranged. The present bending form of the long profile 19 corresponds for example to the shape of a stabilizer for a motor vehicle.

7 illustrates the sequential steps for three-dimensional shaping of the long profile 19 within a bending process. The long profile 19 is provided in the middle of a first step with two spaced single curved bending sections C. The thus transformed long profile 19a is provided in a further step with opposite bending sections D, which adjoin directly to the previous bending sections and also have a simple curvature. The thus created long profile 19b has between its ends and the bending sections C, D still a straight course, which the longitudinal direction Z of the long profile 19 equivalent. With reference to the 5 For example, the bending sections C, D may be formed by a simple bending process within the bending device 1b be created at the same time.

From the bending device 1b becomes the deformed long profile 19b taken by a manipulator, not shown, and to the subsequent bending station 101 passed on. Inside the bending station 101 further bending sections E are arranged between each of the ends and the already created bending sections C, D, through which the end sections are bent. The shaped long profile 19c in turn, with a manipulator, not shown, from the bending station 101 in the subsequent bending station 102 transferred, which two benders 1a having a horizontal bending plane.

As a result, the end portions are bent by bending sections F rectified by 90 °. In a last step inside the bending machine 100 becomes the bending shape of the long profile so created 19d by a further manipulator not shown in the last bending station 103 each transferred with vertical bending planes. This gives the long profile 19d again a simple bend of its end sections on bending sections G. The now created bending shape of the long profile 19e can now be removed by hand or with the help of another manipulator from the last bending station and fed to its further processing.

LIST OF REFERENCE NUMBERS

1

bender

1a

bender

1b

bender

2

upper tool unit

2a

upper tool unit

2 B

upper tool unit

3

lower tool unit

3a

lower tool unit

3b

lower tool unit

4

pusher head

5

Stripper plate

6

telescopic connector

7

swivel head

8th

pushrod

9

threaded rod

10

pressure vessels

11

locknut

12

groove

13

guide section

14

bending unit

14a

bending unit

15

groove

15a

groove

16

base

16a

base

16b

base

17

forming region

17a

forming region

17b

forming region

18

groove

18a

groove

18b

groove

19

long profile

19a

long profile

19b

long profile

19c

long profile

19d

long profile

19e

long profile

20

terminal unit

20a

terminal unit

20b

terminal unit

21

guide rail

21a

guide rail

22

bolt

23

jaw

24

table

25

stamp

26

contour area

27

groove

100

bending machine

101

bending station

102

bending station

103

bending station

A

tracking direction

B

Throughput direction

C

bending section

D

bending section

e

bending section

F

bending section

G

bending section

L1

length

L2

circumferential length

X

closing direction

Y

axis of rotation

Y1

swivel axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• FR 2922127 B1 [0004]
• DE 4400579 C1 [0007]

Claims (22)

Bending device for bending a long profile ( 19 . 19a E), in particular a tube, comprising an upper tool unit ( 2 . 2a ) and a lower tool unit ( 3 . 3a ), which are movable relative to each other, wherein the upper tool unit ( 2 . 2a ) and / or the lower tool unit ( 3 . 3a ) at least one bending region predetermining the forming area ( 17 . 17a ), over which at least one bending section (C-G) on the long profile (FIG. 19 . 19a -E), characterized in that a part of the upper tool unit ( 2 . 2a ) and / or the lower tool unit ( 3 . 3a ) is variable in its inclination about a pivot axis (Y1) and this pivot axis (Y1) is displaceable in synchronism with the change of the inclination on a circular path about a rotation axis (Y) around. Bending device according to claim 1, characterized in that a part of the upper tool unit ( 2 . 2a ) and / or the lower tool unit ( 3 . 3a ) a bending unit ( 14 . 14a ), which over the curved course of the forming area ( 17 . 17a ) is displaceable in the form of a passant of the curvature. Bending device according to claim 1 or 2, characterized in that parts of the upper and lower tool unit ( 2 . 2a ; 3 . 3a ) a common clamping unit ( 20 . 20a ), which is intended for the long profile ( 19 . 19a -E) to fix at least in sections during bending. Bending device according to claim 2 or 3, characterized in that an analogous to the forming area ( 17 . 17a ) curved guide section ( 13 . 13a ) is provided, wherein the bending unit ( 14 . 14a ) shear-resistant along the guide section ( 13 . 13a ) is stored. Bending device according to claim 4, characterized in that the bending unit ( 14 . 14a ) a guide strip ( 21 . 21a ), wherein the bending unit ( 14 . 14a ) via the guide bar ( 21 . 21a ) positively and / or non-positively with the guide portion ( 13 . 13a ) is coupled. Bending device according to claim 5, characterized in that the length of the guide strip ( 21 . 21a ) at least one circumferential length of the guide section ( 13 . 13a ) corresponds. Bending device according to one of claims 3 to 6, characterized in that the bending unit ( 14 . 14a ) and / or the clamping unit ( 20 . 20a ) forming parts of the upper and lower tool unit ( 2 . 2a ; 3 . 3a ) in a closed state at least partially shear-resistant coupled to each other. Bending device for bending a long profile ( 19 . 19a E), in particular a tube, comprising an upper tool unit ( 2 B ) and a lower tool unit ( 3b ), which are movable relative to each other, wherein the upper tool unit ( 2 B ) and / or the lower tool unit ( 3b ) at least one bending region predetermining the forming area ( 17b ), over which at least one bending section (C-G) on the long profile (FIG. 19 . 19a -E), characterized in that the upper tool unit ( 2 B ) and / or the lower tool unit ( 3b ) one to the curvature of the forming area ( 17b ) contoured contour area ( 26 ), wherein the contour area ( 26 ) in a closing direction (X) of the upper and lower tool units (FIG. 2 B . 3b ) is displaceable and the forming area ( 17b ) synchronously with the displacement of the contour area ( 26 ) is displaceable in a direction perpendicular to the closing direction (X) tracking direction (A). Bending device according to claim 8, characterized in that parts of the upper and lower tool unit ( 2 B . 3b ) a common clamping unit ( 20b ), which is intended for the long profile ( 19 . 19a -E) to fix at least in sections during bending. Bending device according to claim 9, characterized in that the clamping unit ( 20b ) is arranged to be displaceable in the tracking direction (A). Bending device according to claim 9 or 10, characterized in that the clamping unit ( 20b ) forming parts of the upper and lower tool unit ( 2 B . 3b ) in a closed state at least partially shear-resistant coupled to each other. Bending plant for the three-dimensional shaping of a long profile ( 19 . 19a E), in particular a tube comprising at least two bending devices ( 1 . 1a B) according to one of the preceding claims 1 to 11, characterized in that at least two bending stations ( 101 . 102 . 103 ), each of the bending stations ( 101 . 102 . 103 ) at least two of the bending devices ( 1 . 1a -B), which are designed to ensure that in each bending station ( 101 . 102 . 103 ) at least two bending sections (C-G) at the same time on the long profile ( 19 . 19a -E) can be produced. Bending plant according to claim 12, characterized in that a manipulator is arranged, which is provided for the long profile ( 19 . 19a E) in at least one of the bending devices ( 1 . 1a B) and / or from at least one of the bending devices ( 1 . 1a -B). Bending plant according to claim 13, characterized in that the long profile ( 19 . 19a E) by the manipulator between at least two bending stations ( 101 . 102 . 103 ) is transferable. Bending plant according to one of claims 12 to 14, characterized in that at least one sensor is arranged, which is provided for the position of the long profile ( 19 . 19a -E) within the bending devices ( 1 . 1a -B). Bending plant according to claim 15, characterized in that at least one of the bending devices ( 1 . 1a B) can be manipulated directly or indirectly in their adjustable bending parameters by position information captured by the sensor. Method for bending a long profile ( 19 . 19a E), in particular a tube, wherein the long profile ( 19 . 19a -E) in a bending device ( 1 . 1a ) and at least partially via a clamping unit ( 20 . 20a ) is fixed and a bending section (C-G) of the long profile ( 19 . 19a -E) around a curved forming area ( 17 . 17a ) of the bending device ( 1 . 1a ) is bent around by the long profile ( 19 . 19a -E) by means of a bending unit ( 14 . 14a ) is at least partially displaced from its position, characterized in that the bending unit ( 14 . 14a ) is tilted during bending about a pivot axis (Y1) and the pivot axis (Y1) in synchronism with the change in inclination of the bending unit ( 14 . 14a ) is displaced on a circular path around a rotation axis (Y). Method according to claim 17, characterized in that the bending unit ( 14 . 14a ) during bending over the curved course of the forming area ( 17 . 17a ) is displaced in the form of a passant of the curvature. Method according to claim 17 or 18, characterized in that the bending unit ( 14 . 14a ) is rolled during bending over a point contact or a line contact on an outer circumference of the bending section (C-G), wherein a portion of the elongated profile (B) located outside the bending section (C-G) 19 . 19a -E) via a non-contact contact with the bending unit ( 14 . 14a ) is displaced from its position. Method for bending a long profile ( 19 . 19a E), in particular a tube, wherein the long profile ( 19 . 19a -E) in a bending device ( 1b ) and at least partially via a clamping unit ( 20b ) is fixed and a bending section (C-G) of the long profile ( 19 . 19a -E) around a curved forming area ( 17b ) of the bending device ( 1b ) is bent around, characterized in that the bending section (C-G) starting from its opposite ends from successively into the forming area ( 17b ) is bent into it. A method according to claim 20, characterized in that a in the clamping unit ( 20b ) fixed part of the long profile ( 19 . 19a -E) is smoothly tracked during the bending of the bending section (C-G). Method according to claim 20 or 21, characterized in that an intermediate section of the long profile (B) located between the bending section (C-G) and a further bending section (C-G) ( 19 . 19a -E) while bending over a stamp ( 25 ) is displaced from its position.

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