EP2529857A1 - Method and device for producing sheet-shaped reinforcement mats - Google Patents

Abstract

The method involves welding multiple rods to a structure made of multiple longitudinal rods (2) and transverse rods (3). An advancement takes place over a traction device (6) by using a train, and is driven in the longitudinal direction (L) and transverse direction (Q). The advancement is carried out at a welded transverse rod (3'), and is rotated in a plane of a wire mesh (1). The train is formed at the welded transverse rods or longitudinal rods (2'), and is releasably attached to the traction device. Independent claims are included for the following: (1) a method for producing a three dimensional truncated cone-shaped reinforcement for concrete components; and (2) an apparatus for manufacturing curved wire mesh.

Description

The invention relates to a method for the production of substantially arcuate structural steel mats from a plurality of bars by welding the bars to a structure consisting of longitudinal bars and transverse bars, starting at a front end by welding a first transverse bar to the longitudinal bars, generating a feed for positioning the longitudinal bars for all further crossbar welds until reaching a desired rear end, wherein to achieve the arch shape of the reinforcing steel mat from the bow interior to the arc outward increasing feed distance is generated, and wherein the feed by train to at least one welded cross bar and / or longitudinal bar preferably in the area the front end takes place. Furthermore, the invention relates to a device for producing substantially arcuate construction steel mats, which consist of longitudinal bars and transverse bars welded together, the device comprising feeders for the longitudinal bars, feeders for the cross bars and a welding device for welding the longitudinal bars with the transverse bars, and wherein the device further comprises a pulling device for generating a feed path increasing from the inside of the sheet of the arched reinforcing steel mat to the outside of the sheet.

Reinforced steel mats (also referred to as reinforcing mats) serve to reinforce (reinforce) concrete components. They are manufactured industrially on semi-automatic or fully automatic machines and consist of intersecting, typically corrugated steel bars, which extend in the longitudinal and transverse direction and are joined together at the intersection points by welding.

An arcuate structural steel mat is a structural steel mat which is curved in its plane, ie in the plane defined by the reinforcing steel mat, at least in one area. This is achieved in that the distance between the welding points of two adjacent transverse bars is smaller with the longitudinal bars located inside the sheet, as the distance between the welding points of two adjacent transverse bars with the longitudinal bars lying in the sheet outer.

Such arcuate structural steel meshes are used to reinforce round, half-round or conical concrete components, e.g. used to reinforce supports for wind turbines, elements for tunneling, pipes or lighthouses.

From the WO 2010/136421 A2 It is known that arcuate mild steel mats are made in Schweißanlangen that one pushes the longitudinal bars through the welding portal, with the help of the Quererstäbeschweißungen are pushed through, while at the same time generates a feed path from the arc inside to the bow outer. The advancing of the longitudinal bars is usually by means of feeders or feed rollers.

This procedure for positioning the longitudinal bars for each upcoming welding cycle has several significant disadvantages: First of all, relative positioning errors between adjacent longitudinal bars can occur. Furthermore, the tracking or the slippage of the feed rollers can lead to an accumulation of positioning errors. These two effects lead to the fact that the arched steel mats can only be produced with a relatively large inaccuracy, which varies from mat to mat. If you want to reduce this inaccuracy, so laborious readjustments are required during the welding process of a mat, which significantly increases the production time. And finally, a conversion of the welding system on the production of a new mat type is very time-consuming, since the feed distance for each longitudinal bar must be set individually.

From the German publication DE 3324678 A1 is known a solution in which the feed is not by pushing but by train. Technically, this is realized by means of a swivel arm. Although this solution does not have a part of the disadvantages described, the flexibility of the production process is severely restricted by the use of a swivel arm, which is pivotably mounted about a fixed point. For example, it is not possible to change the arc radius during the manufacturing process.

Object of the present invention is to avoid the disadvantages described above and improved over the prior art and simplified Specify a method or a comparison with the prior art improved and simplified means for producing arcuate structural steel mats.

This object is achieved by the features of the two independent claims 1 and 9.

A basic idea of the invention therefore consists in that the advancement of the longitudinal bars for the respective welding cycle takes place by pulling on at least one welded transverse bar and / or longitudinal bar, preferably in the area of the front end of the curved structural steel mat. As a result, the desired for each longitudinal bar feed path is automatically achieved, since all the longitudinal bars are connected to this at least one transverse bar and / or longitudinal bar. Relative positioning errors between adjacent longitudinal bars and / or summation errors of positioning errors are excluded so that the arcuate structural steel mesh can be made with higher accuracy. In addition, the settings for the production of a new mat type can be made faster.

The easiest way is when the feed is done by train on the first welded cross bar.

Advantageously, the feed is carried out by train via a pulling device which is driven in the longitudinal and transverse directions and / or which is rotated in the plane of the structural steel mat. In a concrete embodiment example, it may be provided that the traction device comprises a cross slide, which is arranged on a longitudinal slide, wherein both the cross slide and the longitudinal carriage are drivable via a drive device or that the traction device comprises a rotary bar, which via a rotary drive device is rotatable in the plane of the structural steel mat.

It has been found to be expedient if the at least one transverse bar and / or longitudinal bar on which or on which the train takes place is detachably fastened eg to the traction device by means of a gripping device. In this case, the gripping device can be designed quite differently, eg with grippers, with clamping elements or - if it is magnetic steel rods - with electromagnets.

Furthermore, it is advantageous if the pulling device can be controlled via a control device. As a result, a certain once-programmed sequence of a welding process for the production of a specific type of mat can always be carried out in a reproducible manner. In addition, it is possible to more easily and quickly switch between the settings for producing various types of mats. Such a control device may be technically e.g. be realized with the help of a computer.

In a particularly advantageous embodiment of the method for producing arched building block mats, a method step is integrated, in which the sections of the longitudinal bars between a first and a second, subsequent crossbar welding after the first crossbar welding and the subsequent feed to prepare the second crossbar welding into a sheet be deformed. This method step is explained in more detail below in the description of the figures.

Furthermore, the method can be supplemented by first inserting the longitudinal and transverse bars before welding, e.g. unwound from reels by means of a unwinding device and then deformed in a straightening or cutting machine into straight bars or cut to a predetermined length. Advantageously, the longitudinal and transverse rods are unwound in each case in the longitudinal direction and the transverse rods are rotated after cutting in the transverse direction. For this purpose, for example, be provided, preferably movable over rails, transport device.

The process can also be extended to serve the production of three-dimensional truncated cone-shaped reinforcements for concrete components. Namely, this is possible by first producing an arcuate structural steel mat in the manner described and then bending it up three-dimensionally. This process step can be implemented particularly easily by means of the above-described traction device by first moving the traction device in a certain direction to produce the structural steel mat and subsequently reversing the direction of movement of the traction device to form the reinforcement, thereby bending the structural steel mat three-dimensionally becomes. The bending can be realized technically, for example, by means of a bending device, which is preferably designed to be extendable and / or wedge-shaped.

To be particularly advantageous has been found to produce the arcuate structural steel mat first in the horizontal plane and then to pivot such that the axis of symmetry of the three-dimensional truncated cone-shaped reinforcement at the end of the above-described manufacturing process substantially in the vertical direction, i. comes to a halt.

The present invention also relates to a device for producing substantially arcuate structural steel mats. One of the characteristic features of this device is that it comprises, in addition to feeders for the longitudinal bars, feeders for the cross bars and a welding device for welding the longitudinal bars with the transverse bars also a pulling device for generating a feed path from the bow interior of the curved reinforcing steel mat to the outside of the sheet.

It is advantageous if, in addition to the structural features already mentioned above, the device also has guide devices for the longitudinal bars on one side or both sides of the welding device.

The guide devices, which are arranged on the side of the welding device, which faces the feeders for the longitudinal bars (i.e., in front of the welding line), serve to ensure that all the longitudinal bars have a certain distance from each other. For example, these guide devices can be guide rollers or guide plates. Advantageously, they can be tuned to a given Längsstabraster and / or (for the same purpose) exchange.

By means of the guide devices, which are arranged on the side of the welding device, which faces the pulling device (ie behind the welding line), the method step mentioned above, which consists of the sections of the longitudinal bars between each a first and a second, following Cross bar weld after the first cross bar weld and the subsequent feed to make the second cross bar weld into a bend. For this purpose, it is advantageous if these guide devices can be pivoted in and / or are adjustable in the transverse direction via an actuator.

As has already been explained above, an advantageous procedure is that the longitudinal and transverse bars are first unwound from coils by means of an unwinding device, for example, and then shaped into straight bars in a straightening or cutting machine and cut to a predetermined length , In order to transport the longitudinal and / or transverse bars from this straightening or cutting machine to the welding device, the device advantageously has movable transport devices. These transport devices can be movably mounted on rails, for example.

Finally, it has been stated above that the method for the production of substantially arcuate structural steel mats can also be extended to be suitable for the production of three - dimensional truncated cone - shaped reinforcements. In this case, a procedure in which the reinforcing steel mat is first produced in the horizontal plane and then pivoted so that the axis of symmetry of the reinforcement at the end of the manufacturing process is substantially in the vertical direction, was found to be particularly advantageous. The feasibility of this procedure can for example be given by the fact that the area of the device comprising the welding device and the pulling device, is pivotally mounted.

Fig. 1

in der Draufsicht einen schematisch dargestellten Ausschnitt eines bevorzugten Ausführungsbeispiels der Einrichtung zur Herstellung bogenförmiger Baustahlmatten,

Fig. 2a-2c

eine Abfolge dreier Zeichnungen, in denen schematisch in der Draufsicht ein Ausschnitt einer bogenförmigen Baustahlmatte im Bereich der Schweißlinie dargestellt ist,

Fig. 3

in der Draufsicht eine schematisch dargestellte Gesamtansicht des bevorzugten Ausführungsbeispiels aus Fig. 1,

Fig. 4a - 4c

in der Draufsicht drei verschiedene Ausführungsbeispiele einer bogenförmigen Baustahlmatte und

Fig. 5a, 5b

eine Abfolge zweier Zeichnungen zur Illustration des Verfahrens zur Herstellung einer dreidimensionalen kegelstumpfmantelförmigen Bewehrung durch Verbiegen einer bogenförmigen Baustahlmatte.

Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Showing:

Fig. 1

in the plan view a schematically illustrated section of a preferred embodiment of the device for producing curved reinforcing steel mats,

Fig. 2a-2c

a sequence of three drawings in which schematically in the Top view a detail of an arched reinforcing steel mat is shown in the area of the welding line,

Fig. 3

in the plan view of a schematically illustrated overall view of the preferred embodiment Fig. 1 .

Fig. 4a - 4c

in plan view, three different embodiments of an arcuate structural steel mat and

Fig. 5a, 5b

a sequence of two drawings illustrating the method for producing a three-dimensional truncated cone-shaped reinforcement by bending an arcuate structural steel mat.

In the Fig. 1 is a plan view of a section of a preferred embodiment of the device for producing curved reinforcing steel mats 1 shown schematically. The longitudinal bars 2 are fed via a feed table 8 of the welding device 9 and welded to the transverse bars 3 to form an arcuate construction steel mat 1. The welding device 9 comprises a welding bridge with a plurality of, preferably with 12 × 3, movable multi-bladed heads (not shown in the drawing). Right and left of the welding device 9 guide devices 10 and 11 are arranged for the longitudinal bars 2. The guide devices 10, which are located in front of the welding line, are guide rollers which serve to ensure that all the longitudinal bars are at a specific distance from one another. In the illustrated embodiment, the guide rollers are tuned to a predetermined Längsstabraster. The guide devices 11, which are located behind the welding line, serve to form the sections of the longitudinal bars 2 into arc in between a first and a second subsequent transverse bar welding after the first cross bar welding and the subsequent feed in preparation of the second cross bar welding. This process is based on the FIGS. 2a-2c explained in more detail.

• zwei Greifelemente 7, mit deren Hilfe der erste verschweißte Querstab 3' bzw. einer oder mehrerer Längsstäbe 2' im Bereich des vorderen Endes 4 der Baustahlmatte 1 an der Zugvorrichtung 6 lösbar befestigt werden,
• ein Drehbalken 24, mit dessen Hilfe das vordere Ende 4 der Matte in ihrer Ebene über eine Drehantriebsvorrichtung gedreht werden kann,
• einen Querschlitten 23, der auf einem Längsschlitten 22 angeordnet ist, wobei sowohl der Querschlitten 23 als auch der Längsschlitten 22 über eine Antriebsvorrichtung antreibbar sind und der Längsschlitten 22 entlang zweier Schienen 25 in Längsrichtung L bewegt werden kann.

As stated above, a basic idea of the invention is that the advance of the longitudinal bars 2 takes place by train for the pending welding cycle. In this case, in order to obtain the arch shape of the reinforcing steel mat 1, a feed path increasing from the inside of the sheet to the outside of the sheet must be generated. In the illustrated embodiment, the feed takes place by train via a traction device 6. This traction device 6 comprises

• two gripping elements 7, with the aid of which the first welded transverse bar 3 'or one or more longitudinal bars 2' are detachably fastened to the pulling device 6 in the region of the front end 4 of the structural steel mat 1,
• a pivot bar 24, with the aid of which the front end 4 of the mat can be rotated in its plane via a rotary drive device,
• a cross slide 23, which is arranged on a longitudinal slide 22, wherein both the cross slide 23 and the longitudinal slide 22 are driven by a drive device and the longitudinal slide 22 along two rails 25 in the longitudinal direction L can be moved.

The longitudinal direction L and the transverse direction Q are marked in the drawing by means of two arrows. It should be noted that the contours of the components in the area of the welding device 9 are shown projected onto a plane for better illustration, but are only partially visible in reality in plan view.

For the production of the arched reinforcing steel mat 1, the following is used in the illustrated embodiment: First, a plurality of longitudinal bars 2 are fed to the welding device 9. Subsequently, a first transverse bar 3 'is welded to the longitudinal bars 2. Thereafter, this first welded transverse bar 3 'is releasably secured to the pulling device 6 by means of the gripping devices 7, so that the longitudinal bars 2 can be collectively positioned stepwise by means of the pulling device 6 for all subsequent cross bar weldings. In this case, the longitudinal slide 22 moves to the right, the cross slide 23 down and the rotary bar 24 is rotated clockwise. In this way, a feed path increasing from the inside of the sheet to the outside of the sheet is generated. In each case following a feed step, the sections of the longitudinal bars 2 between a first and a second, subsequent cross-bar welding after the first transverse bar welding and the subsequent feed to prepare the second transverse bar welding are deformed into an arc.

This process is based on the FIGS. 2a and 2b explained in more detail below, wherein in these figures, only a small section of the sheet mat in the region of the weld line is shown. The longitudinal bars 2 are on the guide rollers 10 of Welding device 9 (which can not be seen in these figures) supplied until they have reached the position Pos. 1. At this point, the longitudinal bars 2 are welded to a first transverse bar 3 at the points 27. Subsequently, the longitudinal bars 2 (by train) a piece in the direction of in the Fig. 2a to be seen arrow continues to move until the first cross bar 3 is in position Pos. 2. The sections 28 of the longitudinal bars 2, which are located between the guide rollers 10 and the transverse bar position Pos. 2, initially formed as a straight chord. In a second step, in the Fig. 2b is indicated schematically, the guide device 11 is pivoted after the feed to the reinforcing steel mat. There it hooks behind an outer longitudinal rod portion and is then moved over an actuator a piece in the direction of the arrow, that is substantially perpendicular to the longitudinal bar sections 28. As a result, this outer longitudinal bar portion and thus at the same time all other longitudinal bar sections pulled so far outward until the longitudinal bars 2 have reached the transverse bar position Pos. 1 desired for the subsequent transverse bar welding desired positions in the transverse direction. In this way, the first formed as a straight chords sections 28 of the longitudinal bars 2, which are located between the guide rollers 10 and the cross bar position pos. 2, each deformed into an arc. Following this process step, the welding of a next transverse bar 3 takes place (cf. Fig. 2c ).

In the Fig. 3 is an overall view of the in Fig. 1 shown preferred embodiment of the device for producing curved reinforcing steel mats 1 to see. It should be noted in advance that, as with the other figures, it is a schematic representation, ie that technical details that are not important to the basic understanding have been omitted. Right above eight coils 20 are indicated, which are located in a unwinding device 12. On these coils 20, the rods are wound, from which the reinforcing steel mat 1 is welded together, that is, that these rods are first unwound and fed to a straightening or cutting machine 13. Here they are first deformed into straight bars, cut to a predetermined length and finally placed on a bar outlet beam 14. The part of the rods, which is provided as longitudinal bars, is then moved by means of a movable rail 16 transport device 15 in the direction of the arrow, passed to a transfer device 17 and subsequently using this Transfer device 17 to the right of the welding device 9 supplied. The part of the cut rods provided as crossbars is likewise fed to the welding device 9 in a corresponding manner by means of a transport device 18 which moves along two rails 19. Of course, these cross bars, so that they show Q in the transverse direction, must be rotated by 90 ° during this transport process. Therefore, the rails 19 have a 90 ° curve. The transport device 18 for the transverse rods is guided below the feed table 8 for the longitudinal bars to the welding device 9. The end positions of the transport devices 15 and 18 and the transfer device 17 are shown in dashed lines. It should also be noted that the transfer device 17 is movably mounted between two guide rails 29.

Using the in the Fig. 3 illustrated device, it is also possible to produce three-dimensional truncated cone-shaped reinforcements for concrete components. For this purpose, first an arcuate structural steel mat 1 in the horizontal plane, ie produced in the drawing plane. During the manufacture of the reinforcing mat 1, the pulling device 6 moves to the right. Following the last transverse bar welding, the direction of movement of the pulling device 6 is then reversed, ie, the entire mat 1 is pushed back to the left while being three-dimensionally arranged by wedge-shaped bending elements arranged in the area of the feed table 8 (not shown in the drawing) is bent. At the same time, the entire area 26 of the device comprising the welding device 9 and the pulling device 6 is pivoted by 90 °, so that the axis of symmetry of the reinforcement at the end of the production process is substantially in the vertical direction.

The Fig. 4a, 4b and 4c show three different embodiments of arcuate structural steel mats 1, which can be produced by the method or by means of the device. For example, mats with different radii of curvature, mats that are curved in only one area or mats can be made in different widths and lengths. In addition, mild steel mats 1 can be produced with different crossbar or longitudinal bar spacing. The spacing of the transverse bars 3 can be varied over a different impact on the feed, whereas the distance of the longitudinal bars 2 by an adjustment or replacement of the guide rollers can be varied 10th

FIGS. 5a and 5b schematically indicate the manner in which a three - dimensional truncated cone - shaped reinforcement 21 can be produced by bending from an arcuate structural steel mat 1. In each case, only the outer contour of the structural steel mat 1 is shown in these two figures. For reasons of clarity, the grid of longitudinal and transverse bars has been omitted. Following the three-dimensional bending of the reinforcing steel mat 1 to the reinforcement 21, the edges of the two ends 4 and 5 are advantageously still seized.

LIST OF REFERENCE NUMBERS

1

arched reinforcing steel mat

2, 2 '

longitudinal bars

3, 3 '

crossbars

4

front end of the arched structural steel mat

5

rear end of the arched structural steel mat

6

hitch

7

gripping device

8th

Feed table for the longitudinal bars

9

welder

10

Guide rollers in front of the welding line

11

Guiding devices behind the welding line

12

unwinding

13

Straightening or cutting machine

14

Staff outlet bar

15

Transport device for the longitudinal bars

16

Rails for the transport device for the longitudinal bars

17

Transfer device for the longitudinal bars

18

Transport device for the cross bars

19

Rails for the transport device for the cross bars

20

Do the washing up

21

Truncated cone-shaped reinforcement

22

longitudinal slide

23

cross slide

24

bogie beam

25

Rails for the longitudinal slide

26

pivotally mounted area

27

welding locations

28

Longitudinal bar sections

29

Guide rails for the transfer device

Q

transversely

L

longitudinal direction

Pos. 1, 2

Positions of a longitudinal bar

Claims (20)

Method for the production of substantially arcuate structural steel mats (1) from a multiplicity of bars by welding the bars to a structure consisting of longitudinal bars (2) and transverse bars (3), beginning at a front end (4) by welding a first transverse bar (Fig. 3 ') with the longitudinal bars (2), generating a feed for positioning the longitudinal bars (2) for all other transverse bar welds until reaching a desired rear end (5), wherein to achieve the arch shape of the structural steel mat (1) from the inside of the sheet to the outside of the sheet towards increasing feed distance is generated, and wherein the feed by train to at least one welded transverse bar (3 ') and / or longitudinal bar (2') preferably in the region of the front end (4), characterized in that the feed by train over a Pulling device (6) which is driven in the longitudinal direction (L) and transverse direction (Q). A method according to claim 1, characterized in that the feed by train on the first welded cross bar (3 ') takes place. A method according to claim 1 or 2, characterized in that the feed by train via a traction device (6), which is rotated in the plane of the structural steel mat (1). Method according to one of claims 1 to 3, characterized in that the at least one transverse bar (3 ') and / or longitudinal bar (2') on which or at which the train is carried out, releasably attached to the pulling device (6). Method according to one of claims 1 to 4, characterized in that the sections (28) of the longitudinal bars (2) between each a first and a second, subsequent cross-bar welding after the first cross-bar welding and the subsequent feed to prepare the second transverse bar welding to a Bow to be deformed. Method according to one of claims 1 to 5, characterized in that the longitudinal bars (2) and the transverse bars (3) before the welding first unwound from coils (20), then deformed into straight bars and finally cut to a predetermined length, wherein the longitudinal bars (2) and transverse bars (3) are preferably unwound in each case in the longitudinal direction (L) and the transverse bars (3) are rotated after being cut in the transverse direction (Q). Method for producing a three-dimensional truncated cone-shaped reinforcement (21) for concrete components, characterized in that the reinforcement (21) is formed by bending a substantially arcuate structural steel mat (1), wherein the reinforcing steel mat (1) is produced in particular by a method according to one of claims 1 until 6 is produced. A method according to claim 7, characterized in that the pulling device (6) for producing the reinforcing steel mat (1) first in one direction and then to form the reinforcement (21) moves in an opposite direction and while the reinforcing steel mat (1) is bent three-dimensional, wherein the reinforcing steel mat (1) is preferably first produced in a horizontal plane and then pivoted such that the axis of symmetry (S) of the reinforcement (21) at the end of the manufacturing process substantially in the vertical direction. Device for producing substantially arcuate structural steel mats (1) consisting of longitudinal bars (2) and transverse bars (3) welded together, the device comprising feed devices (8, 15, 16, 17) for the longitudinal bars (2), feed devices (18 , 19) for the transverse bars (3) and a welding device (9) for welding the longitudinal bars (2) with the transverse bars (3), and wherein the device further comprises a pulling device (6) for producing a curved inside of the sheet of reinforcing steel mat (1 ) to the bow outer increasing feed line comprises, characterized in that the pulling device (6) via a drive device in the longitudinal direction (L) and in the transverse direction (Q) is drivable. Device according to claim 9, characterized in that the pulling device (6) is controllable via a control device. Device according to claim 9 or 10, characterized in that the pulling device (6) comprises a transverse slide (23) which is arranged on a longitudinal slide (22), wherein both the transverse slide (23) and the longitudinal slide (22) via a drive device are drivable. Device according to one of claims 9 to 11, characterized in that the traction device (6) via a rotary drive device in the plane of the structural steel mat (1) is rotatable, wherein the traction device (6) preferably comprises a rotary bar (24), which via a rotary drive device in the plane of the structural steel mat (1) is rotatable. Device according to one of claims 9 to 12, characterized in that the pulling device (6) comprises at least one gripping device (7). Device according to one of claims 9 to 13, characterized in that on one side or both sides of the welding device (9) guide devices (10, 11) for the longitudinal bars (2) are arranged, wherein it is in the guide devices (10), the on the side of the welding device (9) which faces the feed devices (8, 15, 16, 17) for the longitudinal bars (2), preferably being guide rollers. Device according to claim 14, characterized in that the guide devices (10) which are arranged on the side of the welding device (9) which faces the feed devices (8, 15, 16, 17) for the longitudinal bars (2) a predetermined longitudinal scanning are tunable and / or interchangeable and / or. Device according to claim 14 or 15, characterized in that the guide devices ( 11), which are arranged on the side of the welding device (9) which faces the pulling device (6), can be pivoted in are formed and / or via an actuator in the transverse direction (Q) are adjustable. Device according to one of claims 9 to 16, characterized in that the device comprises a take-off device (12) for coils (20) on which the longitudinal bars (2) and the transverse rods (3) are wound, and / or a straightening or Cutting machine (13). Device according to one of claims 9 to 17, characterized in that the feed devices (8, 15, 16, 17) for the longitudinal bars (2) and / or the feed devices (18, 19) for the transverse rods (3), preferably via rails (16, 19), movable transport devices (15, 18). Device according to one of claims 9 to 18, characterized in that in the region of the feed devices (8, 15, 16, 17) for the longitudinal bars (2) a Aufbiegevorrichtung is arranged, wherein the Aufbiegevorrichtung is preferably extendable and / or wedge-shaped. Device according to one of claims 9 to 19, characterized in that the region (26) of the device comprising the welding device (9) and the pulling device (6) is pivotally mounted.

Images