EP2279811A1 - Machine with cross-transport device and method for producing a casing using the machine - Google Patents

Abstract

The machine has a base body comprising front and rear processing sides, and a tool assembly (14) for processing a workpiece (32) made from metal. A cross-transport device (30) transports the workpiece from the rear processing side to the front processing side through a passage opening. The transport device has a central rail (36) that runs through the passage opening. The transport device stays in force-transmission connection with the tool assembly in such a manner that forces produced during deformation of the workpiece are partially braced by the transport device. An independent claim is also included for a method for manufacturing a cylindrical casing from a workpiece made from metal.

Description

The invention relates to a work machine, in particular a wire or strip bending machine, for forming workpieces passing through the work machine, having a wall-like base body which has a front and a rear machining side and having at least one tool unit for machining the workpieces, wherein the tool unit is attachable or attached to the front or the rear processing side, wherein the working machine has a transverse transport device which is formed such that workpieces to be formed by a processing side, preferably the rear processing side to the other processing side, preferably the front processing side formed in the base body through opening can be transported, and that the workpieces along a to the planes of the processing pages substantially orthogonal transverse transport direction, in particular along a bending axis d It tool aggregate, the tool assembly arranged in the region of the passage opening can be fed directly.

Such a work machine in which workpieces can be transported from one processing side to the other processing side, for example, from DE 196 05 647 A1 known. Reference is made in particular to FIG. 13A there. The transverse transport shown there is based on a supply of strip material in the transverse direction, which is pre-cut on the rear processing side. The pre-punched, but still contiguous strip material is then passed through an opening in the body and fed to the front processing side a tool unit, not shown, with the example, a Sleeve can be made of pre-punched plates of the strip material. The illustrated transverse transport variant is thus based essentially on the fact that a contiguous strip material is conveyed in the transverse transport direction. The supply of strip material in the transverse direction requires in addition to the already mentioned punching device still a collection device, so that the machine takes a relatively large overall space in the transverse direction.

The object of the invention is to develop a working machine of the type mentioned in that the transverse transport of individual workpieces, in particular plate-like workpieces, is made possible, wherein the space taken in the transverse direction space should be as small as possible.

According to the invention it is proposed for this purpose that the transverse transport device is in power transmission connection with the tool unit, such that forces occurring during the forming of workpieces are at least partially supported by the transverse transport device.

Due to the power transmission connection between the transverse transport device and the tool unit, the transverse transport device itself can be kept compact. It extends into the area of the tool unit lying on the other side of the processing and is supported on the machine by the tool unit.

According to a further aspect of the invention, which also has independent significance, the transverse transport device has a central rail running through the passage opening and designed in such a way that workpieces can be transported along it. Such a central rail makes it possible that the transport device can be kept compact in the transverse direction of the work machine, as well as the existing space in the through hole is utilized to accommodate the transverse transport device. In connection with the power transmission connection between the transverse transport device and tool unit, it is Particularly advantageous that the central rail can be guided very close to the tool unit of the machine, so that a reliable and reliable supply of workpieces in the tool unit is possible.

In a further development, it is proposed that the transverse transport device be supported by means of a support element on the tool unit and / or on that side of the main body on which the tool unit is arranged. Such a support element allows the already mentioned power transmission connection between the transverse transport device and tool unit. In this case, the support element is preferably dimensioned such that it can support forces occurring during forming of the workpiece at least in one direction on the tool unit or on the main body. The acting forces can be transmitted from the bending core to the support element and from there to the tool unit and the main body.

The central rail is preferably connected to the said support element, so that the central rail is supported by the support element on the tool unit or on the main body.

In order to be able to support the bending forces occurring during forming on the base body of the working machine, it is proposed that a bending core of the tool assembly can be connected or connected to the transverse transport device, in particular to the central rail and / or the supporting element. This connection between the bending core and the central rail or support element is possibly carried out by means of other components which are connected to the bending core, the support element or the central rail.

The transverse transport device is preferably designed such that it can be connected in different relative positions to the tool unit with this. It is especially thought that the transverse transport device can be installed rotated relative to the tool assembly by 180 ° relative to the bending axis, so that the tool unit workpieces can be supplied in different flow or transport levels. The transverse transport device is designed so that its function is ensured, regardless of the position in which it is positioned to the tool unit. Assuming that workpieces are supplied in the form of individual boards above the central rail and along this the bending core at its upper peripheral edge, the same workpieces can be supplied to the lower peripheral edge of the bending core mounted in the other installed position transverse transport device below the central rail. According to the feed in the respective flow or transport planes then takes place in the tool unit forming, which begins first from above or first from below by moving corresponding punch in the direction of the bending core. When reversing the transverse transport device and the already mentioned supporting element is rotated accordingly, so that the bending forces acting during forming by the support member depending on the initial bending direction from above or from below can be supported accordingly.

In order to enable this support in the different mounting positions of the transverse transport device in a simple manner, it is proposed that the support element is a circular segment disc, which is supported with its peripheral edge in a corresponding recess on the tool unit and / or on the base body, wherein the circular segment disc preferably concentric to the bending axis is arranged. The mentioned recess on the tool unit or on the base body is provided both above and below the bending axis and the central rail, so that the support element can be supported in any possible mounting position of the transverse transport device on the tool unit or the main body. The shape of a circular segment disc has, in addition to the advantage that it can be used in different twisted mounting positions of the transverse transport device, still the further advantage that in Center of the circle segment through which the bending axis generally passes, acting forces can be passed evenly in the radial direction over the entire circumference of the circle segment, so that the forces can be optimally distributed to the tool unit or the body. Thus, there are no excessive internal stresses on the mentioned machine parts.

The circular segment disk is preferably dimensioned such that workpieces can be transported along the bending axis or along the central rail of the circular segment disk to the tool unit. That is, the angle included by the radial sides of the circle segment is less than 180 °, preferably less than 120 °, and preferably greater than 60 °. In a particularly preferred embodiment, the circular segment disc has approximately the shape of a quarter circle, d. H. the radial sides enclose an angle of about 90 °.

In order to move workpieces along the transport rail in the direction of the tool unit, it is proposed that on the central rail a workpieces moving transport carriage is slidably disposed. This transport carriage is movable along the central rail both towards the tool unit and away from it, so that individual workpieces can be continuously fed to the tool unit by the reciprocating motion. Of course, this movement of the transport carriage with a machine cycle, which is essentially predetermined by the bending process, tuned. The transport carriage is also preferably designed so that it can simultaneously move several, with respect to the transport direction arranged successively workpieces in the direction of the tool unit.

So that the workpieces can be fed to the tool unit as possible in a rectilinear movement, ie in a defined transport plane, it is proposed that the central rail is arranged essentially concentric to the bending core of the tool unit. It was on this point noted that the central rail is preferably a cylindrical rod whose central rail axis is aligned with the bending axis. Of course, the central rail may also have a different shape, for example in the form of a double-T, a rectangular profile or the like.

The transverse transport device are preferably associated with lateral and parallel to the central rail Werkstückgleitschienen on which slidably mounted workpieces to be transported, wherein preferably the distance between the two Werkstückgleitschienen is adjustable in order to adapt to the dimensions of the transported workpieces. For this purpose, it is further proposed that the Werkstückgleitschienen are removably attached to the tool unit and / or on the base body to change their position relative to the central rail can. Such a change in position relative to the central rail is particularly necessary when the transverse transport device, in particular central rail, as well as the attached transport carriage and the support element are rotated by 180 ° and are arranged in this further installation position in the machine. Since the different mounting positions, as already indicated above, cause workpieces above or below the central rail are supplied to the tool unit, of course, the workpieces laterally supporting workpiece slide rails must be attached according to other locations of the body or of the tool unit, so that the workpieces can be supported or held in the corresponding transport plane.

The transport carriage preferably has a plurality of carrier elements which can be brought into contact with respective workpieces to be transported, which are pivotable relative to the central rail about the transport axis and are movable back and forth in the transport direction together with the transport carriage. These entrainment elements are preferably designed in the form of pins or bolts, which act on the rear edge of the workpieces with respect to the transport direction towards the tool aggregate. so that the workpieces can be moved to the tool unit. In order to enable the backward movement of the transport carriage, the carrier elements are pivoted about the central rail so that they lie out of contact mti the workpieces, so are pivoted from the transport plane of the workpieces, so that the transport carriage and the entrainment below or above (depending on Installation position of the transverse transport device) of the workpieces can be moved away from the tool unit.

The transverse transport device is fastened in addition to its support by means of the support element on the tool unit or the main body on the processing unit side facing away from the tool unit by means of a holder. This holder may be formed in a flange and is also designed such that it does not hinder the movement of the transport carriage along the central rail.

The workpieces, which are transported by the transverse transport device substantially orthogonal to the planes of the processing pages, can be fed in this direction of the transverse transport device, for example via a magazine device which feeds individual boards. However, in order to save installation space in the transverse direction of the work machine, it is proposed that workpieces be fed on the processing unit side facing away from the tool unit along the main body substantially orthogonal to the transport direction of the transverse transport device. Such a feed also has the advantage that in the longitudinal direction of the working machine the transverse transport, for example, a punching device can be preceded, in which from a fed in the longitudinal direction of the machine strip material to be transported in the transverse direction boards are punched.

According to a preferred embodiment, the working machine comprises on the processing unit facing away from the tool unit a coupled to the transverse transport device, preferably integrated, further Tool unit, which brings the supplied workpieces before transporting them to the other processing side in a preform. Such a further tool unit can, for example, serve to slightly pre-bend the essentially flat workpieces in their outer edge regions, which is advantageous, for example, in the manufacture of cylindrical sleeves in the first tool unit. If, in particular, the front and rear edge regions or edge sections of the workpieces are bent relative to the longitudinal direction of the work machine, further transport of the workpieces thus deformed in the longitudinal direction is not optimal. Therefore, the direct production of a preform before or during the transverse transport of the workpiece is particularly advantageous.

• Zuführen der Werkstücke auf einer Bearbeitungsseite, vorzugsweise der hinteren Bearbeitungsseite, der Arbeitsmaschine;
• vorzugsweise Vorbiegen der Werkstücke, insbesondere Umbiegen von äußeren Endabschnitten der Werkstücke;
• Transportieren der Werkstücke von der einen Bearbeitungsseite auf die andere Bearbeitungsseite, vorzugsweise vordere Bearbeitungsseite direkt in ein an dieser Bearbeitungsseite angebrachtes Werkzeugaggregat;
• Biegen des Werkstücks im Werkzeugaggregat zur fertigen Hülse, wobei die beim Biegevorgang zusammentreffenden Enden des Werkstücks vorzugsweise mittels einer beim Biegevorgang hergestellten Clinchverbindung miteinander verbunden werden;
• vorzugsweise Weitertransport der Hülse in eine Kalibrierstation, insbesondere Ringpresse;
• Auswerfen der fertigen Hülse.

According to another aspect of the invention, there is provided a method of manufacturing a cylindrical sleeve from a plate-like metal workpiece using a work machine as suggested above. This procedure comprises the following steps:

• Feeding the workpieces on a processing side, preferably the rear processing side, the working machine;
• preferably pre-bending the workpieces, in particular bending over outer end sections of the workpieces;
• Transporting the workpieces from the one processing side to the other processing side, preferably the front processing side directly into a tool unit attached to this processing side;
• Bending the workpiece in the tool assembly to the finished sleeve, wherein the ends of the workpiece coinciding in the bending operation are preferably connected to each other by means of a clinch connection produced during the bending operation;
• preferably further transport of the sleeve into a calibration station, in particular ring press;
• Eject the finished sleeve.

Fig. 1

zeigt eine schematische Vorderansicht einer Biegemaschine mit einem an einer vorderen Bearbeitungsseite angebrachten Werkzeugaggregat.

Fig. 2

zeigt stark schematisch und vereinfacht eine Teilschnittdarstel- lung einer Quertransportvorrichtung für die Arbeitsmaschine.

Fig. 3

zeigt eine perspektivische Darstellung von schräg vorne des Werkzeugaggregats sowie von Teilen der Quertransportvor- richtung.

Fig. 4

zeigt eine Querschnittsdarstellung entsprechend der Linie IV-IV der Fig. 1.

Fig. 5

zeigt eine vergrößerte Querschnittsdarstellung der Quertrans- portvorrichtung der Fig. 4.

Fig. 6

zeigt eine vereinfachte perspektivische Darstellung von schräg hinten auf die Quertransportvorrichtung sowie die Rückseite des Werkzeugaggregats.

Fig. 7

zeigt eine Vergrößerung der Quertransportvorrichtung der Fig. 6.

Fig. 8

zeigt in den Teilfiguren a) und b) stark vereinfacht unterschied- liche Einbaustellungen der Quertransportvorrichtung relativ zum Werkzeugaggregat.

Fig. 9

zeigt beispielhaft das Umformen eines vorgebogenen Werk- stücks.

The invention will be described below with reference to an embodiment of the working machine with reference to the accompanying figures by way of example and not limitation.

Fig. 1

shows a schematic front view of a bending machine with a mounted on a front processing side tool unit.

Fig. 2

shows very schematically and simplifies a partial sectional view of a transverse transport device for the working machine.

Fig. 3

shows a perspective view obliquely from the front of the tool assembly and parts of the transverse transport device.

Fig. 4

shows a cross-sectional view along the line IV-IV of Fig. 1 ,

Fig. 5

shows an enlarged cross-sectional view of the transverse transport device of Fig. 4 ,

Fig. 6

shows a simplified perspective view of obliquely behind the transverse transport device and the back of the tool unit.

Fig. 7

shows an enlargement of the transverse transport device of Fig. 6 ,

Fig. 8

shows in the subfigures a) and b) greatly simplified different installation positions of the transverse transport device relative to the tool unit.

Fig. 9

shows by way of example the forming of a pre-bent workpiece tee.

Fig. 1 shows a work machine 10, which is set up as a bending machine for the production of sleeves. It concerns with the Fig. 1 to a simplified schematic view of a front side A of the bending machine 10. The bending machine comprises a supported on a substrate U wall-like base body 12, on which a working tool for machining workpieces 14 (also referred to as bending station or bending tool) is mounted. From the illustration it can be seen that 12 openings 16 are recessed on the base body, through which the view of an indicated central drive wheel 18 is released. Drive devices 20a-20d for bending punches 22a-22d of the bending tool 14 can be coupled to this drive wheel 18. The bending punches 22a-22d shown here are movable relative to a bending axis B substantially in the radial direction towards a bending core 24 and away from it. The tool unit 14 further comprises a base plate 12 attached to the base plate 26 and a cover plate, not shown here, which is attachable to the bending tool 14 that the bending punch 22 a - 22 d between it and the base plate 26 are received. With regard to the exact structure of the tool unit 14 and the bending punch used, reference is made to the German patent application filed at the same time by the applicant entitled "Bending tool for a working machine, in particular wire or strip bending machine". The content of this patent application with respect to the configuration of the tool assembly 14 and the bending dies 22a-22d is incorporated herein by reference.

Fig. 2 shows a highly schematic section through the bending machine 10 according to the section line II-II. The main body 12 of the bending machine and a passage opening 28 recessed in the base body 12 can be seen. Through this passage opening 28 extends a transverse transport device 30, here shown only partially and greatly simplified, by means of which plate-like workpieces 32 extend from the rear side B of the working machine 10 can be fed to the front of the tool unit 14 A. From the tool unit 14 of the bending core 24 can be seen. The supplied along the base 12 on the back B of the bending machine 10 workpieces 32 pass through a predetermined number of process steps from the back B in the tool assembly 14 on the front A. As shown in Fig. 2 As can be seen, these can be, for example, five steps, which are marked with the Roman numerals I to V. The first position of a workpiece 32 is at I the insertion of the workpiece 32 in the transverse transport device. Thereafter, a movement of the workpiece takes place substantially orthogonal to the previous transport direction in a so-called transverse transport direction QT to the tool unit 14 out. In step II, an optional pre-bending of the workpiece 32 can take place, wherein in particular lateral edge sections 32-1 and 32-2 can be slightly pre-bent. For this purpose, a corresponding bending tool with its base plate 25 may be provided on the transverse transport device 30 or on the main body 12. As already mentioned, the pre-bending of the workpieces 32 is not absolutely necessary. The positions III and IV are pure intermediate positions on the transverse transport device 30 during the transport of a workpiece 32 through the passage opening 28 in the base body 12. In step V, the workpiece 32 is tangent to the bending core 24 and can by the in the Fig. 1 be seen bending punch 22a - 22d bent to the finished sleeve. Further details on the transverse transport device 30 will be described below.

Fig. 3 is a schematic perspective view obliquely from the front of the tool assembly 14. It can be seen the base plate 26 of the tool assembly 14 and two of the attached punch 22b and 22c. In the base plate 26, an opening 34 is recessed through which workpieces can be conveyed. The passage opening 34 of the base plate 26 is slightly smaller than the passage opening 28 in the base body 12 (see Fig. 2 ). However, the size of the passage opening 34 of the base plate 26 may also vary depending on the size of the workpieces that are to be transported through this passage opening 34 therethrough.

From the representation of Fig. 3 are also parts of the transverse transport device 30 can be seen, namely a central rail 36 and a supporting member connected thereto 38. The central rail 36 is a cylindrical rod, possibly also a hollow cylindrical rod whose longitudinal axis LA is aligned with the bending axis BA. Towards the punching dies 22b and 22c, a cylindrical spacer element 40 adjoins the support element, to which the bending core 24 (not illustrated here) can be fastened. For further details on the tool assembly 14, reference is made to the simultaneously filed patent application entitled "Bending tool for a working machine, in particular wire or strip bending machine" whose contents are incorporated herein by reference.

Fig. 4 shows a cross section through the bending machine 10 according to the section line IV-IV of Fig. 1 , and Fig. 5 shows an enlarged section corresponding to the dashed rectangle V of Fig. 4 ,

From these cross-sectional views, on the left side of the main body 12, the rear processing side B and on the right side, the front processing side A can be seen. Other components already known are the tool unit 14 on the front A with its base plate 26, the bending core 24 and punch punches 22b and 22c. As already mentioned, the passage opening 28 is formed in the main body 12 through which the mentioned transverse transport device 30 extends. The transverse transport device is supported on the front side A by means of its support element 38 in a corresponding recess 42 of the base plate 26 of the tool unit 14. On the rear side B, the transverse transport device 30 is connected by means of a flange-like holder 44 with the base body 12. The transverse transport device has the already mentioned central rail 36, which extends through the passage opening 28 of the base body 12 and is connected by means of the spacer 40 with the bending core 24. The central rail 36 formed as a cylindrical rod and the bending core 24 are concentric with one another aligned, such that the bending axis BA is aligned with the transverse transport axis QT. On the central rail 36, a transport carriage 46 is mounted displaceably in the transverse transport direction QT. This transport carriage 46 can be reciprocated along the central rail 36. The transport carriage 46 is not rotatable relative to the central rail 36 around it. On transport carriage 46 a plurality of driving elements in the form of pins or bolts 48 are mounted, which are pivotable relative to the transport carriage 46 and the central rail 36 about the axis QT. To perform this pivotal movement, a pivot drive 50 is provided, which is fixedly connected to the transport carriage 46. With regard to the detailed operation, reference is made to the description of the following FIGS. 6 and 7 directed.

Fig. 6 is a perspective view of obliquely behind the transverse transport device 30 and the tool assembly 14 with its base plate 26. From this illustration, two side of the central rail 36 arranged Werkstückgleitschienen 52-1 and 52-2 can be seen, on which workpieces 32 during their transport in the transverse transport direction QT their lateral edge portions 32-1 and 32-2 rest.? The slide rail 52-1 is also in the Fig. 3 seen. In the Fig. 3 are also provided for each slide 52-1 and 52-2 provided adjusting means 54-1 and 54-2, by which the distance of the slide rails 52-1 and 52-2 can be adjusted to each other. This adjustment takes place as a function of the dimensions of the workpieces 32 to be transported. For the sake of completeness, it is pointed out that the cross-sectional representations of FIGS FIGS. 4 and 5 the slide 52-2 is shown.

In Fig. 6 Furthermore, a drive device 56 is indicated, by means of which the transport carriage 46 can be moved back and forth along the central rail 36 in the transverse transport direction QT. It is also noted that the in Fig. 6 shown workpieces 32 are shown with non-pre-bent end portions 32-1 and 32-2. However, such workpieces could also be transported by the transverse transport device 30.

Fig. 7 is an enlarged view of the transverse transport device 30. As already mentioned, the transverse transport device 30 has a plurality of carrier elements 48. These driving elements are arranged in pairs laterally of the central rail 36. This results in the transverse transport direction QT in the direction of the bending tool 14, a group of right-hand driving elements and a group of left driving elements. These groups are characterized in that their reference numbers are each identified by the lowercase letter r or I. Further, the driving elements are arranged in pairs laterally of the central rail 36 so that a pair causes the forward movement of a workpiece by applying to this workpiece and the other pair of driving element causes the braking of the transported workpiece. This is in the reference numerals characterized in that driving elements for the feed have a lowercase letter v and driving elements for braking a lowercase letter b. Further, the reference numerals have a continuous numbering of 1 to 7 in accordance with their paired order along the central rail 36. All driving elements 48-1 to 48-7 on the left side (with lower case letter I) are via a common carrier 581 with two pivoting levers 60 and 62, which are pivotally mounted on the transport carriage 46. The pivot levers 60 and 62 are connected to each other on the side facing away from the carrier 581 via a common pivot axis 64. At the pivot axis 64 is already in Fig. 5 mentioned pivot drive 50 attached, which is rotatably supported by means of a tightened on the transport carriage ring holder 66. If the drive 50 is actuated, the pivot levers 60 and 62 are pivoted about the axis QT upwards or downwards and together with them the carrier 581 and the left-side driving elements 48-1 to 48-71. Of course, a pivoting drive arrangement described for this for the left side is also available for the entrainment elements 48-1 r to 48-7r arranged on the right side. The statements made for the left driving elements thus also apply analogously to the right driving elements 48-1r to 48-7r. The drive device 50 can be electric, hydraulic or pneumatic.

The provided for the advance of workpieces in the direction of the tool assembly 14 entrainment elements 48-1, 48-3, 48-5 and 48-7 on both sides are arranged to each other at a regular distance. The carrier elements 48-2, 48-4 and 48-6 on both sides of the central rail 36, which act counter to the feed direction and brake the workpiece, are each connected to a carrier 68l or 68r which is displaceably connected to the carrier 581 or 58r. The carriers 68r and 68l are displaceable relative to the carriers 58r and 581, respectively, such that the distance between the feed-causing carrier elements and the deceleration-causing carrier elements can be adjusted. This adjustable distance W is set according to the dimensions of the workpiece to be conveyed. In order to fix the carrier 68r or 681, respectively screws 70 are provided.

From the representation of Fig. 7 It can also be seen that the support element 38, by means of which the transverse transport device 30 is supported on the base plate 26 of the tool assembly, has substantially the shape of a circle segment and is received with its outer peripheral edge 72 in the recess 42 formed in the base plate 26. The Fig. 7 further shows that in the base plate 26, an upper recess 42 'is formed. This also arcuate or circular recess can also accommodate the support member 38 of the transverse transport device when the transverse transport device is rotated by 180 ° relative to the axis QT or the bending axis BA to be installed. It should be noted that the transverse transport device 30 requires little space in the transverse direction. Furthermore, the transport carriage to be moved is relatively light, so that, including the workpieces to be transported only a weight of less than 20 kg must be moved.

By means of the transverse transport device 30, workpieces 32 in different transport planes TE1 or TE2 can be fed to the tool unit 14 be what is indicated by the dash-dotted lines in the Fig. 4 is indicated. With reference to Fig. 8 This will be explained in a simplified schematic representation in more detail. Fig. 8a shows the case in which workpieces 32 are transported above the central rail 36. By way of example, the carrier elements 48-31v and 48-3rv are shown here. Furthermore, from this illustration, the Schwenkhebelarm 60 for the left driving element 48-31v can be seen. The entrainment 48-3rv is mounted on a symmetrically formed Schwenkhebelarm 60 '. As can be seen from the illustration, the two pivot lever arms 60, 60 'and the entrainment elements 48-3 mounted thereon can be pivoted upwards or downwards about the central rail 36 or the axis QT, which is indicated by the double arrows P. If a workpiece 32 is transported in the direction of the tool unit, the carrier elements 48 in the in Fig. 8a shown upper position, which can also be referred to as transport position. As soon as the displacement corresponding to one working stroke has been carried out along the central rail 36, the pivot lever arms 60, 60 'and the associated entrainment elements 48-31v, 48-3rv are pivoted downwards into a return position in which the entrainment elements 48 are no longer in engagement can be moved away from the tool unit 14 with the workpiece 32, but so that in the next power stroke, a subsequent workpiece 32 can be promoted in the direction of the tool assembly 14. In the Fig. 8a illustrated installation position of the transverse transport device 30 corresponds to that in the Fig. 1 to 7 illustrated installation.

Fig. 8b shows a rotated by 180 ° mounting position of the transverse transport device 30, wherein the central rail 36, the support member 38 and the transport carriage together with swivel lever arms 60, 60 'and 48 Mitsubishi 48-31v, 48-3rv are also rotated. In such a mounting position workpieces below the central rail 36 can be supplied to the tool unit, so that the workpiece 32 tangentially abuts the tool unit on the underside of the bending core and in a first step is bent from below upwards to the finished sleeve. In order that the workpieces 32 to be conveyed are also laterally supported in this position, the slide rails 52-2 and 52-1 are moved from a position lying laterally above the central rail 36 (FIG. Fig. 8a ) is mounted in a position laterally below the central rail 36, as is the Fig. 8b can be seen.

From the representations of Fig. 8 It can be seen that the transverse transport device by simply rotating a supply of workpieces in different transport levels TE-1 and TE-2 allows. The feeding of workpieces in different transport planes leads to a high degree of flexibility of the working machine, because it can optionally be decided whether an upper side 32o of the workpiece 32 forms the outer peripheral edge after being formed into the sleeve ( Fig. 8a ) or the inner peripheral edge ( Fig. 8b ). This is particularly interesting when sleeves are made of multilayer materials, for example, given that the punching direction must be from soft to hard material, ie, that the soft material will always be the top 32o. Depending on how the finished sleeve should look, the workpiece 32 can then be bent around the bending core from above or from below, so that the softer material forming the upper side 32o lies either outside or inside the finished sleeve.

Finally, reference is made to a special bending process for producing a cylindrical sleeve using the presented machine with transverse transport device with reference to the Fig. 9 , This figure shows a workpiece 32 whose outer ends 32-1 and 32-2 have been pre-bent. This pre-bending preferably takes place on the rear processing side B of the working machine (see step II of the Fig. 2 ). The addressed edge portions 32-1 and 32-2 are pre-bent with a radius which corresponds to the radius R of the bending core. The pre-bend is made to a predetermined length, which is preferably about 1/16 to 1/4 of the total length of the workpiece. In the present example, the pre-bent length is about 1/8 of each

Total length of the workpiece 32. The thus pre-bent workpiece is then supplied by means of transverse transport device to the tool unit 14, where it is first transformed from above to the bending core around. It is specific to this technique that in the final stage of the forming process, when the bending punches 22c, 22d press the workpiece against the bending core 24 from below, the two pre-bent ends 32-1, 32-2 can be brought into engagement in nearly tangential direction , Such a tangential telescoping of corresponding contours for producing a clinch connection prevents shearing at the connecting edges, as is often the case with non-pre-bent ends, which are pressed together with a more radially acting component. A finished sleeve can finally be fed to a calibrating device, in particular a ring press, in which it is brought into its definitive final shape by hammering. Subsequently, the finished sleeve is ejected from the bending machine.

Claims (15)

Working machine, in particular wire or strip bending machine, for forming workpieces (32) passing through the working machine, with a wall-like base body (12) having a front and a rear working side (A, B) on a base (U), and at least one tool assembly (14) for machining the workpieces (32), the tool assembly (14) being attachable or attached to the front or rear machining side (A, B),
wherein the work machine has a transverse transport device (30) which is designed such that workpieces (32) to be reshaped are formed by one in the main body (1) from one processing side, preferably the rear processing side (B), to the other processing side, preferably the front processing side (A). 12) formed through opening (28) are transportable, and that the workpieces (32) along a to the planes of the processing sides (A, B) substantially orthogonal transverse transport direction (QT), in particular along a bending axis (BA) of the tool unit (14), in the region of the passage opening (28) arranged tool unit (14) are fed directly,
characterized in that the transverse transport device (30) with the tool unit (14) in power transmission connection (38, 42), such that during forming of workpieces (32) occurring forces are at least partially supported by the transverse conveyor (30). Work machine according to the preamble of claim 1 or claim 1, characterized in that the transverse transport device (30) through the through opening (28) extending central rail (36), which is formed deart that workpieces (32) along this are transportable. Work machine according to claim 1 or 2, characterized in that the transverse transport device (30) by means of a support element (38) on the tool unit (14) and / or on that processing side (A) of the base body (12) is supported, on which the tool unit (14 ) is arranged. Work machine according to claim 2 and 3, characterized in that the central rail (36) is connected to the support element (38). Work machine according to claim 3 or 4, characterized in that a bending core (24) of the tool unit (14) with the transverse transport device (30), in particular with the central rail (36) and / or the support element (38), connectable or connected. Work machine according to one of claims 1 to 5, characterized in that the transverse transport device (30) is designed such that it is connectable in different relative positions to the tool unit (14) with this. Working machine according to claim 3 and 6, characterized in that the support element (38) is a circular segment disc, which is supported with its peripheral edge (72) in a corresponding recess (42) on the tool unit (14) and / or on the base body (12), wherein the circular segment disc (38) is preferably arranged concentrically to the bending axis (BA), preferably the circular segment disc (38) is dimensioned such that workpieces (32) along the bending axis (BA) on the circular segment disc (38) over to the tool unit (14) are transportable. Work machine according to one of claims 1 to 7 in any case according to claim 2, characterized in that on the central rail (36) a the workpieces (32) to the tool unit (14) moving transport carriage (46) is arranged displaceably. Work machine according to claim 2 and 8, characterized in that the central rail (36) is arranged substantially concentric to the bending core (24) of the tool assembly (14). Work machine according to claim 8 or 9, characterized in that the transverse transport device (30) side and parallel to the central rail (36) arranged Werkstückgleitschienen (52-1, 52-2) are assigned, on which to be transported workpieces (32) slidably rest, wherein Preferably, the distance between the two Werkstückgleitschienen (52-1, 52-2) is adjustable to adapt it to the dimension of the workpieces to be transported (32), wherein preferably the Werkstückgleitschienen (52-1, 52-2) on the tool unit (14 ) and / or on the base body (12) are removably attached to change their position relative to the central rail (36) can. Work machine according to one of claims 8 to 10, characterized in that the transport carriage (46) has a plurality of respective to be transported workpieces (32) in contact with bring driving elements (48-1 ... 48-7), relative to the central rail (36 ) are pivotable about the transport axis (QT) and are reciprocable together with the transport carriage (46) in the transport direction, wherein preferably the entrainment elements (48-1 ... 48-7) between a driving position in which they with the workpieces (32) are brought into contact or stand, and a release position in which they are on the workpieces (32) movable past, are pivotable. Work machine according to one of claims 8 to 11, characterized in that the transverse transport device (30) via a holder (44) on the tool assembly (14) facing away from the machining side (B) of the base body (12) is attached. Work machine according to one of the preceding claims, characterized in that workpieces (32) on the tool unit (14) facing away from the machining side (B) of the base body (12) along the base body (12) substantially orthogonal to the transport direction (QT) of the transverse transport device (30 ) can be supplied. Work machine according to one of the preceding claims, characterized in that it comprises on the tool unit (14) facing away from the machining side (B) with the transverse transport device (30) coupled further tool unit, the supplied workpieces (32) prior to their transport to the other processing side ( A) brings into a preform. A method of manufacturing a cylindrical sleeve from a plate-like metal workpiece, using a work machine according to any one of the preceding claims, comprising the steps of: Feeding the workpieces (32) on a machining side (B), preferably the rear machining side, of the work machine (10); preferably pre-bending of the workpieces (32), in particular bending of outer end portions (32-1, 32-2) of the workpieces (32); Transporting the workpieces (32) from the one processing side (B) to the other processing side (A), preferably the front processing side directly into a tool unit (14) attached to this processing side; Bending the workpiece (32) in the tool assembly (14) to the finished sleeve, wherein the ends (32-1, 32-2) of the workpiece coinciding in the bending operation are preferably connected to each other by means of a clinch connection produced during the bending operation; preferably further transport of the sleeve into a calibration station, in particular Ring press; Eject the finished sleeve.

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