EP1857587B1 - Method for manufacturing a hollow body of a machine for manufacturing and/or refining a sheet of material and hollow body - Google Patents

Description

The invention relates to a method for producing a hollow body of a machine for producing and / or finishing a material web, in particular a paper or board web extending at least over the width of the material web, wherein the hollow body of a plurality of sheets having a sheet thickness of less 20 mm, in particular less than 12 mm, is produced, wherein the sheets of at least one plate-shaped material precisely cut out and then connected to each other, in particular welded, wherein the hollow body is provided with at least one partition plate, preferably with a plurality of bulkhead plates, with the side walls of the hollow body forming sheets is tapped according to the preamble of claim 1.

Furthermore, the invention relates to a hollow body of a machine for producing and / or finishing a material web, in particular a paper or board web, which extends at least over the width of the material web according to the preamble of claim 19th

Such a hollow body in the embodiment of a traverse is for example from the German patent application DE 102 51 592 A1 known. The horizontally and transversely to the web running direction and vertically movable traverse mounted on the underside of a continuous pressure roller is part of a pressure roller system.

In a known manner, such a hollow body is made of thick and welded together sheets, whereby it is generally very difficult, depending on the materials used and its size. Furthermore, it requires in its production a high material usage and sometimes very long and therefore also expensive processing times. In addition, it is due to the known high heat input due to the welding process used to a strong shrinkage and a large deformation of the individual components. Due to these strong deformations, each component must also have a correspondingly high machining allowance with regard to the subsequent machining.

From the WO 2006/010794 A1 is a support structure for a material-forming machine is known, which provides for the storage of stiffer body to stabilize a thin-walled sheet metal housing. In such an inhomogeneous structure, the embedded rigid body are largely self-imposed under load, since a derivative of the voltages in less-stressed zones is severely limited by the weak housing.

The invention is therefore based on the object, a method for producing a hollow body of the type mentioned in such a way that the mentioned disadvantages of the prior art are largely avoided. In particular, the use of materials, so the mass is reduced and the production time, in particular the welding time, the hollow body can be significantly reduced. Furthermore, a corresponding hollow body to be specified.

This object is achieved in a method of the type mentioned in the present invention that at least some of the pins of a respective bulkhead are hole-welded to the openings of the corresponding side wall.

The object of the invention is completely solved in this way.

The invention is thus characterized by at least one with the side walls drafted bulkhead plate, wherein the partition plate thereby in corresponding Engages openings of the side walls and at least some of the pins of a respective bulkhead are hole-welded to the openings of the corresponding side wall, whereby a desired low heat input is achieved during welding. Here, the pins mounted in the partition plate are shorter than the plate thickness, so that no abzunehmender supernatant immediately arises.

With regard to the achievement of improved accuracies, it is advantageous if the metal sheets forming the side walls of the hollow body are at least partially, preferably completely dovetailed with one another. Thus, the required accuracy comes from the sheets and any necessary alignment work will be significantly reduced.

In a preferred embodiment it is provided that a plurality of bulkhead plates are arranged perpendicular or substantially perpendicular to the longitudinal axis of the hollow body at a mutual distance in the range of 500 to 1200 mm, preferably from 650 to 900 mm. The arrangement of bulkhead plates in this distance range provides the hollow body with the necessary rigidity for the operation of the machine, in particular with regard to its deflection and torsion.

In contrast, it is provided in a further preferred embodiment that a plurality of bulkhead plates are arranged at a respective angle to the longitudinal axis of the hollow body. In this case, the partition plates can be arranged on a zig-zag line along the longitudinal axis of the hollow body and two adjacent partition plates touch ("touching truss structure") or the bulkhead plates can be arranged on a zig-zag line along the longitudinal axis of the hollow body and two adjacent bulkheads have a mutual distance from each other ("spaced truss structure"). Both embodiments provide the advantage that the stiffness and the natural frequency of the hollow body are increased while keeping the overall weight low.

Furthermore, two adjacent sheets, in particular side walls, additionally connected to one another, in particular with at least one corner plate, preferably a plurality of corner plates, in particular welded. This in turn provides increased stiffness of the hollow body with only a slight increase in weight of the hollow body.

So that the hollow body can be mounted in the machine according to requirements, elements, in particular receptacles, are welded to it, at least on the front side. These elements can additionally be tapped with the hollow body.

The precise cutting out of the sheets from the at least one plate-shaped material takes place in a preferred embodiment by means of a thermal separation process, in particular laser cutting, or by means of a non-thermal separation process, in particular water jet cutting. As a result, the sheets after cutting no longer have to be processed, which in turn saves time and money.

Laser cutting is a thermal separation process for plate-shaped material (usually metal sheets, more rarely also wood panels and comparable materials) by means of a laser. The process is used where complex contours and precise, fast processing (typically 10 m / min) are required. Compared to alternative methods such as punching, laser cutting can be used economically even at very low batch sizes. Focused high-power lasers are used, ie corresponding gas lasers (usually the CO ₂ laser) or solid-state lasers.

A distinction is made between fusion cutting, where the cut seam is melted and blown out of the kerf with a gas jet, and flame cutting, where oxygen is used as the cutting gas to oxidize the eroding effect and thus the penetration depth of the cut increase. Sublimation cutting is when the heated material does not melt but evaporates.

Currently, the maximum workable plate thicknesses for metal are about 25 mm, the resulting kerf is burr-free and therefore does not need to be reworked. 3D CAD / CAM systems can be used for offline programming of complex 3D cutting contours.

When water jet cutting, the material to be processed is separated by a high-pressure water jet. This jet has a pressure of up to 6,000 bar. Outlet speeds of up to 1,000 m / s are achieved. The processing takes place almost without heating of the material to be cut. Due to the high pressure, the cutting water is germ-free (high-pressure sterilization). The water does not need to be specially treated. Only to increase the pump life, a treatment may be necessary, for example, by water softening or reverse osmosis system. Due to the high exit velocity of the water, a sound pressure of up to 130 dB is produced during cutting. By cutting under water, for example by increasing the water level in the beam catcher, the sound emission can be significantly reduced.

With regard to the cutting process, a distinction is made between pure water cutting and abrasive cutting. When pure water cutting only the beam energy of the water is used. The cutting performance in hard materials is very limited. However, with soft materials, the kerf can only be 0.1 mm. For beam focusing polymers can be added. On the other hand, abrasive cutting involves adding a cutting agent, a so-called abrasive, to the jet to increase cutting performance. Only by the addition of such an abrasive, such as garnet or corundum, it is possible to cut harder materials that are not separable with pure water jet

So that a hollow body can be produced with the largest possible flat surfaces, at least some of the sheets are preferably directed after the precise cutting out of the at least one plate-shaped material. The direction can be done by means of well-known straightening devices.

Moreover, at least some of the sheets, after precise cutting out of the at least one sheet-shaped material, can be deformed, in particular bent when a bending moment is applied, and when a plastic and thus permanent deformation is brought about. Thus, non-planar surfaces of the hollow body can be produced in a simple manner.

As a bending process for this purpose, the pivoting bending, the Gesenkbiegen, also called folding, and roll bending come into question. When swivel bending the sheet is clamped by a hold-down and bent by a pivoting movement of the tool. On the other hand, during blank bending, the un- or pre-bent workpiece is placed on a template with a V-shaped opening and then bent. A distinction is made between free bending (the processed sheet touches the die only at the two edges), embossing bending (the sheet is stamped between punch and die at high pressure) and three-point bending (the free bending is specified by a controlled insert in the die).

The welding of the sheets is preferably carried out by means of at least one welding robot. As a result, high accuracy and low production costs can be achieved.

As a preferred welding method for the production of the hollow body is in particular a known method such as manual arc welding according to DIN EN ISO 4063: 2000-04, inert gas welding (SG) according to DIN ISO 857-1: 2002-11, metal inert gas welding (MSG) / (MIG / MAG) , Tungsten inert gas welding (TIG), TIG pulse welding or plasma welding (tungsten plasma welding) in question. The welding can be done using heat and / or pressure - with or without welding consumables. Furthermore, the welding work is preferably carried out according to EN 25817 - B.

The object of the invention is achieved by a hollow body having the features of claim 13.

The hollow body may be formed as a cross member, which finds its use in the field of a winding device. Thus, it can be, for example, a knife crosshead, a traverse of the cutting separation or a pressure roller traverse.

The pressure roller traverse, including the pressure roller carried by it and other units carried by it, preferably has a weight of less than 600 kg / m, in particular of less than 550 kg / m, based on its length, and / or a mass of 9.25. Length ^2.5 to, where mass is in kilograms and the length is in meters. Furthermore, the ratio between the height and the width of the pressure roller traverse is between 0.8 to 3 times the width.

In a further embodiment, the hollow body according to the invention can generally be a machine part in a paper or board machine, in a calender, in a reel, in a reel magazine with spool truck, in a splicing device, in a machine housing or in a packing installation.

Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.

Figur 1

eine perspektivische Teilansicht eines erfindungsgemäßen Hohlkörpers;

Figur 2

eine erste Querschnittdarstellung eines erfindungsgemäßen Hohlkörpers;

Figur 3

eine zweite Querschnittdarstellung eines erfindungsgemäßen Hohlkörpers;

Figur 4

eine erste Horizontalschnittdarstellung eines erfindungsgemäßen Hohlkörpers;

Figur 5

eine zweite Horizontalschnittdarstellung eines erfindungsgemäßen Hohlkörpers;

Figur 6

eine dritte Horizontalschnittdarstellung eines erfindungsgemäßen Hohlkörpers; und

Figuren 7A bis 7D, Figuren 8A bis 9D, Figuren 9A bis 9D und Figuren 10A bis 10F

Detailansichten von möglichen Ausgestaltungen der in der Figur 1 dargestellten Verschweißung/Fügung.

Show it

FIG. 1

a partial perspective view of a hollow body according to the invention;

FIG. 2

a first cross-sectional view of a hollow body according to the invention;

FIG. 3

a second cross-sectional view of a hollow body according to the invention;

FIG. 4

a first horizontal sectional view of a hollow body according to the invention;

FIG. 5

a second horizontal sectional view of a hollow body according to the invention;

FIG. 6

a third horizontal sectional view of a hollow body according to the invention; and

Figs. 7A to 7D, Figs. 8A to 9D, Figs. 9A to 9D and Figs. 10A to 10F

Detailed views of possible embodiments of the in the FIG. 1 shown welding / joining.

The FIGS. 1 to 6 each show a view or a representation of a hollow body 1 of a machine for producing and / or finishing a material web, not shown, in particular a paper or board web extending at least over the width of the material web, not shown, and often from a plurality of sheets 2 to 13, with a sheet thickness d of less than 20 mm, in particular less than 12 mm, was produced, wherein the sheets 2 to 13 cut out of at least one plate-shaped material precisely and then joined together, in particular welded. The welds are in the FIGS. 1 to 6 For the purpose of better understanding only partially explicitly shown or symbolically indicated.

As a preferred welding method for the production of the hollow body 1 came in particular a known method such as manual arc welding according to DIN EN ISO 4063: 2000-04, inert gas welding (SG) according to DIN ISO 857-1: 2002-11, gas metal arc welding (MSG) / (MIG / MAG ), Tungsten inert gas welding (TIG), TIG pulse welding or plasma welding (tungsten plasma welding). Welding could be done using Heat and / or pressure - done with or without welding consumables. Furthermore, the welding work was preferably carried out in accordance with EN 25817-B and the welding of the sheets 2 to 13 was carried out by means of at least one welding robot known to the person skilled in the art.

The in the FIGS. 1 to 6 shown hollow body 1 has only by way of example a quadrangular cross-sectional shape Q1 ( FIGS. 1 to 3 ) on. Rather, the cross-sectional shape Q1 can assume any polygonal contour.

The FIG. 1 now shows a partial perspective view of a hollow body 1, the sheets 2 to 5 forming the side walls were additionally at least partially, preferably completely zapped together. The hollow body 1 was further provided with at least one partition plate 6, preferably with a plurality of bulkhead plates 6, which were connected to the side walls forming sheets 2 to 5. In this case, the respective partition plate 6 was tapped with the side walls 2 to 5, so that it engages in corresponding openings 14 of the side walls 2 to 5. At least some of the pins 15 of the respective partition plate 6 were also hole-welded to the openings 14 of the corresponding side wall 2 to 5.

The FIGS. 2 and 3 show two cross-sectional views of a hollow body 1, as shown for example in the FIG. 1 can be shown at least partially.

In the execution of FIG. 2 were a plurality of bulkheads 6 perpendicular or substantially perpendicular to the longitudinal axis L (arrow) of the hollow body 1 at a mutual distance A (arrow) in the range of 500 to 1200 mm, preferably from 650 to 900 mm arranged. The corners 16 of the partition plate 6 shown were removed accordingly and the individual bulkhead plate 6 may have a corresponding recess 18 in the central region 17 for the purpose of further weight reduction (dashed line). The recess 18 can have any requirements fulfilling cross-sectional shape Q2.

In the execution of FIG. 3 two adjacent sheets 2, 3; 4, 5 of the side walls additionally connected to a plurality of corner plates 7 to 10, in particular welded. In each case two opposing corner plates 7, 8 can be arranged along the longitudinal axis L (arrow) of the hollow body 1 spatially offset from two other opposing corner plates 9, 10 (dashed line).

The FIGS. 4 to 6 show three horizontal sectional views of a hollow body 1 with two sheets (side walls) 3, 5, as he, for example, in the FIG. 1 can be shown at least partially.

In the execution of FIG. 4 were a plurality of bulkhead plates 11 arranged at a respective angle α to the longitudinal axis L (arrow) of the hollow body 1 and preferably circumferentially with the adjacent sheets 2 to 5 (see. FIGS. 1 to 3 ), preferably welded. The bulkhead plates 11 may be arranged overlapping or spaced in the direction of the longitudinal axis L (arrow) of the hollow body 1. In the present embodiment, they are spaced (distance B).

And in the remarks of FIGS. 5 and 6 the bulkhead plates 12, 13 were arranged at an angle β on a zig-zag line 19 along the longitudinal axis L (arrow) of the hollow body 1 and preferably circumferentially with the adjacent sheets 2 to 5 (see. FIGS. 1 to 3 ), preferably welded. The zig-zag line 19 is in the execution of FIG. 5 bounded by the hollow body 1, so that two adjacent bulkhead plates 12, 13 touch ("touching truss structure"). On the other hand, the zig-zag line 19 in the execution of FIG. 6 not bounded by the hollow body 1, so that two adjacent bulkhead plates 12, 13 have a mutual distance C to each other ("spaced truss structure"). The angle β can in the embodiments of FIGS. 5 and 6 basically any suitable value, in particular between 30 and 60 °, assume.

The in the FIGS. 1 to 6 Hollow bodies 1, which are at least partially illustrated, furthermore have in common that elements which are not explicitly shown on the front side, in particular receptacles, could be welded onto them. Of course, these elements could additionally be tapped with the hollow body 1.

The precise cutting out of the sheets 2 to 13 takes place from the at least one plate-shaped material by means of a thermal separation process, in particular laser cutting, or by means of a non-thermal separation process, in particular water jet cutting. The two separation methods have already been described in detail above.

Furthermore, at least some of the sheets 2 to 13 after precise cutting out of the at least one plate-shaped material have been straightened and / or deformed, in particular bent when a bending moment is applied and when a plastic and permanent deformation is brought about. The possible bending methods have already been described in detail above.

The in the FIGS. 1 to 6 At least partially illustrated hollow body 1 may be formed as a traverse, which finds its use in the field of a winding device. Thus, it may be, for example, a knife traverse, a traverse of the cutting separation or a pressure roller traverse already described.

In a further embodiment, in the FIGS. 1 to 6 At least partially illustrated hollow body 1 also generally be a machine part in a paper or board machine, in a calender, in a reel, in a spool magazine with spool truck, in a Spliceeinrichtung, in a machine housing or in a packing plant.

The FIGS. 7A to 7D . 8A to 8D . 9A to 9D and 10A to 10F show in respective Detail view of preferred embodiments X in the FIG. 1 illustrated welding / joining of the partition plate 6 and the pin 15 with the side wall 2 and the opening 14. Of course, the other welds / joints can be performed in this form.

The figures xA the FIGS. 7 . 8th and 9 each show an unwelded state, the figures xB the corresponding welded state and the figures xC and xD the respective plan view of the figures xA and xB.

In the execution of FIG. 7A is the pin 15 of the partition plate 6 with respect to the opening 14 of the side wall 2 back. This backlog will be paid according to FIG. 7B 20 hole-welded with additional material.

On the other hand concludes in the execution of Figure 8A the pin 15 of the partition plate 6 with the opening 14 of the side wall 2 largely flush. The two parts 2, 6 are according to FIG. 8B connected in the arc welding process without the addition of additional weld metal.

And in the execution of Figure 9A closes the pin 15 of the partition plate 6 with the opening 14 of the side wall 2 turn largely flush. The two parts 2, 6 are according to FIG. 9B only in the preferably lasered bevel 21 (FIG. Figure 9A ) connected to a Y-seam 22, with only a small heat input is necessary. This method is particularly suitable for connections in which the weld is not loaded on train.

The FIGS. 10A to 10C each show a design form of a joint 23 between the pin 15 of the partition plate 6 and the opening 14 of the side wall 2, wherein the FIGS. 10D to 10F an enlargement of the respective joint 23 of the FIGS. 10A to 10C demonstrate.

In the execution of Figure 10A the pin 15 of the partition plate 6 is positioned by means of small lugs 24 mounted in the opening 14 of the side wall 2.

When joining the pin 15 and the opening 14, the lugs 24 are plastically deformed.

In the remarks of the Figures 10B and 10C the pins 15 of the partition plates 6 are introduced with "play" in the openings 14 of the side walls 2, in the embodiment according to the FIG. 10B one-sided fitting, in the execution according to FIG. 10C ideally centered.

In summary, it should be noted that a method of the type mentioned is further developed by the invention that the disadvantages of the prior art mentioned are largely avoided. In particular, the use of materials, ie the mass, are reduced and the production time, in particular the welding time, of the hollow body is significantly reduced.

LIST OF REFERENCE NUMBERS

1

hollow body

2

Side wall (sheet metal)

3

Side wall (sheet metal)

4

Side wall (sheet metal)

5

Side wall (sheet metal)

6

Partition plate (sheet metal)

7

Corner plate (sheet metal)

8th

Corner plate (sheet metal)

9

Corner plate (sheet metal)

10

Corner plate (sheet metal)

11

Partition plate (sheet metal)

12

Partition plate (sheet metal)

13

Partition plate (sheet metal)

14

opening

15

spigot

16

corner

17

Central area

18

recess

19

Zig-zag line

20

material

21

Fiber-sawn chamfer

22

Y-seam

23

coincidence

24

nose

A

Distance (arrow)

B

distance

d

sheet thickness

L

Longitudinal axis (arrow)

Q1

Cross-sectional shape

Q2

Cross-sectional shape

X

detailed view

a

angle

ß

angle

Claims (15)

1. Method for producing a hollow body (1) of a machine for producing and/or finishing a material web, in particular a paper or cardboard web, which hollow body (1) extends at least over the width of the material web, the hollow body (1) being produced from a multiplicity of metal sheets (2 to 13) with a sheet-metal thickness (d) of less than 20 mm, in particular less than 12 mm, the metal sheets (2 to 13) being cut precisely out of at least one plate-shaped material and subsequently being connected to one another, in particular welded, the hollow body (1) being provided with at least one stiffening plate (6), preferably with a plurality of stiffening plates (6), which stiffening plate (6) is mortised with the metal sheets (2 to 5) which form side walls of the hollow body (1) and in the process engages into corresponding openings (14) of the side walls (2 to 5), characterized in that at least some of the tenons (15) of a respective stiffening plate (6) are puddle-welded to the openings (14) of the corresponding side wall (2 to 5).
2. Method according to Claim 1, characterized in that the metal sheets (2 to 5) which form the side walls of the hollow body (1) are mortised to one another at least partially, preferably completely.
3. Method according to Claim 1 or 2, characterized in that a plurality of stiffening plates (11) are arranged perpendicularly or substantially perpendicularly with respect to the longitudinal axis (L) of the hollow body (1) at a mutual spacing (A) in the range from 500 to 1200 mm, preferably from 650 to 900 mm.
4. Method according to Claim 1 or 2, characterized in that a plurality of stiffening plates (12, 13) are arranged at a respective angle (α, β) with respect to the longitudinal axis (L) of the hollow body (1).
5. Method according to Claim 4, characterized in that the stiffening plates (12) are arranged on a zigzag line (19) along the longitudinal axis (L) of the hollow body (1), and two adjacent stiffening plates (12) are in contact with one another.
6. Method according to Claim 4, characterized in that the stiffening plates (13) are arranged on a zigzag line (19) along the longitudinal axis (L) of the hollow body (1), and two adjacent stiffening plates (13) are at a mutual spacing (B) from one another.
7. Method according to one of the preceding claims, characterized in that two adjacent metal sheets (2, 3; 4, 5), in particular side walls, are connected to one another, in particular welded, additionally by way of at least one corner plate (7, 8; 9; 10), preferably a plurality of corner plates (7, 8; 9; 10).
8. Method according to one of the preceding claims, characterized in that elements, in particular receptacles, are welded onto the hollow body (1) at least on the end side.
9. Method according to one of the preceding claims, characterized in that the metal sheets (2 to 13) are cut precisely out of the at least one plate-shaped material by means of a thermal separating process, in particular laser cutting, or by means of a non-thermal separating process, in particular water-jet cutting.
10. Method according to one of the preceding claims, characterized in that at least some of the metal sheets (2 to 13) are straightened after being cut precisely out of the at least one plate-shaped material.
11. Method according to one of the preceding claims, characterized in that, after being cut precisely out of the at least one plate-shaped material, at least some of the metal sheets (2 to 13) are processed by forming, in particular are bent with a bending moment being applied and with a plastic and permanent deformation being brought about.
12. Method according to one of the preceding claims, characterized in that the welding of the metal sheets (2 to 13) takes place by means of at least one welding robot.
13. Hollow body (1) of a machine for producing and/or finishing a material web, in particular a paper or cardboard web, which hollow body (1) extends at least over the width of the material web, the hollow body (1) being produced from a multiplicity of metal sheets (2 to 13) with a sheet-metal thickness (d) of less than 20 mm, the metal sheets (2 to 13) being cut precisely out of at least one plate-shaped material and it subsequently being possible for the said metal sheets (2 to 13) to be connected to one another, the hollow body (1) being provided with at least one stiffening plate (6) which is mortised with the metal sheets (2 to 5) which form side walls of the hollow body (1) and in the process engages into corresponding openings (14) of the side walls (2 to 5), characterized in that at least some of the tenons (15) of a respective stiffening plate (6) are puddle-welded to the openings (14) of the corresponding side wall (2 to 5).
14. Hollow body (1) according to Claim 13, characterized in that it is configured as a crossmember which is used in the field of a winding apparatus.
15. Hollow body (1) according to Claim 14, characterized in that the crossmember is a knife crossmember, a crossmember of the cut separation means or a pressure-roll crossmember.

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