WO2015024548A2

WO2015024548A2 - Device and method for producing a folded spiral-seam tube and folded spiral-seam tube produced according to the method and by said device from a profiled metal strip

Info

Publication number: WO2015024548A2
Application number: PCT/DE2014/000412
Authority: WO
Inventors: Horst Hahn; Hans-Georg Anton
Original assignee: Fritz Hahn Gmbh & Co. Kg
Priority date: 2013-08-21
Filing date: 2014-08-18
Publication date: 2015-02-26
Also published as: DE102013013735A1; WO2015024548A3; DE102013013735B4

Abstract

The present invention relates to a device (1) for producing a folded spiral-seam tube (2) by screw-shaped winding of a profiled metal strip (6) having a lateral fold (19) and an edge bead (20).

Description

Apparatus and method for producing a

Windelfalzrohres and a made with the device and by the method of a profiled metal strip winding alzrohr

The present invention relates to a device for

Production of a spiral duct by

helical winding of a profiled metal strip, each having a lateral fold and an edge bead. The winding device comprises a plurality of arranged on the outer circumference of the tube to be wound support rollers, one inner and one outer, at the inlet point of the tape in the

Winder arranged connecting roller, a spaced before the connecting rollers feed roller pair, arranged between the connecting rollers and the feed roller pair tape guide, arranged between the tape guide and the connecting rollers pressure roller and a further tape guide, which is arranged in front of the feed roller pair.

Spiral ducts are widely used in ventilation technology and are used there as flexible or rigid pipes in a variety of ways. Winding a sheet metal strip into a pipe is a common technique. Generic devices for producing such Windelfalzrohre are known from DE 30 22 575 C3, EP 0 182 001 Bl, DE 35 40 125 C3 or DE 198 30 401 Cl.

The above-mentioned prior art devices are particularly designed to manufacture flexible corrugated tubes. Especially in ventilation technology, however, rigid tubes with a smooth inner surface are often used due to their lower internal air resistance and the lower material requirements. Such rigid pipes are

Usually manufactured via tube winding machines, which are equipped with a winding mandrel, which has the disadvantage that

CONFIRMATION COPY depending on the diameter of the tube to be produced

set different feed angle and, where appropriate, the winding mandrel must be changed, resulting in significant conversion times and corresponding costs.

The object of the present invention is to provide an apparatus and a method by means of which rigid spiral ducts with different diameters can be produced quickly and inexpensively.

The task is solved by providing a

Device based on a tube winding machine for flexible spiral ducts, but using special tool rolls that are suitable for the use of smooth

Metal bands are suitable. The object is further achieved by the use of a profiled metal strip, which has only smooth straight surfaces, wherein the angles are held so that a dense stacking and rolling of the metal bands is made possible.

When looking for a way smooth flat

Metal strips quickly and easily in a winding process to process a rigid spiral tube was

found that normal winding tube machines for flexible

Wickelfalzrohre can be used if their

Tool rolls are adjusted accordingly. Thus, a device according to the invention for producing a

Windelfalzrohres by helically winding a profiled metal strip from a winding device with circular on the outer circumference of the tube to be wound

arranged support rollers, one inner and one outer, at the inlet point of the tape in the

Winding device arranged connecting roller, one arranged at a distance in front of the connecting rollers

Pick roller pair, one between the connecting rollers and the guide roller pair arranged tape guide, one arranged between the tape guide and the connecting rollers

Andrückrolle and another tape guide, in front of the

Pick roller pair is arranged.

The pair of intake rollers is adapted to the profiled metal band, which has a lateral fold and an edge thickness, and thereby as a profiling tool with a profile

formed, which is impressed on the already profiled strip to be wound in a first deformation step. For this purpose, a profiled metal strip is used whose profile is formed in an advantageous embodiment so that after the profiling of the flat starting band

only flat smooth surfaces with angles are present, which allow a dense stacking or rolling up of the metal strip. In a particularly preferred embodiment, the profiled metal strip has a lateral fold formed as a right-angled isosceles triangle and an edge bead which is designed as a trapezoidal depression with an opening angle of 130 ° to 140 °, preferably approximately 135 °. In this embodiment, the metal strip, the support angle for the fold and the edge thickness are respectively 40 to 50 °, preferably about 45 °, so that a particularly dense stacking and rolling of the metal strip without problems by jamming or slipping is possible.

After deformation, the metal strip is guided over a tape guide to the connecting rollers, wherein a pressure roller and a guide pin is passed. The pressure roller, the

is arranged immediately in front of the connecting rollers, ensures a pre-curvature of the metal strip in the winding direction and thus allows a smooth running of the metal strip.

At the same time, the pressure roller ensures that the lateral fold of the metal strip folds over when connecting the endless belt to the right side. In a preferred embodiment of the tube winding machine is on the opposite side to the pressure roller between

Feed roller pair and pressure roller a guide pin

arranged, which acts as a pressure counterpart to the pressure roller and acts on the outer leg of the edge bead and thus the folding direction of the edge bead in connecting the

Metal strip influenced in the right direction. An advantageous embodiment of the guide pin provides that it tapers conically at its insert tip and is designed quasi as a set screw, with which the back pressure can be adjusted.

The pair of connecting rollers is at the inlet of the

Metal band arranged in the winding device and consists of a larger outer connecting roller and a

smaller inner connecting roller. The profile of

Connecting rollers are designed so that the seam after joining completely on the outside of the

Wickelfalzrohres and the Wickelfalzrohr inside a continuous smooth even in the band connection

Surface has. The profile of the connecting rollers is adapted to the profile of the metal strip, wherein the inner and outer connecting rollers each have on their outer circumference a the fold of the band adapted profile and the outer

Connecting role additionally on its inner circumference another, the edge thickness of the band has adapted profile, which is formed in a preferred embodiment as a rectangular depression. Is laterally offset in the middle of the rectangular recess and / or in the outer roller

arranged advantageously over the bottom of the recess protruding rounded locking pin, which additionally compresses the seam during folding of the tape and

compacted. A further advantageous embodiment of the profiled connecting rollers provides that the profile adapted to the rebate is provided with an in-mold at the outer circumference of the connecting rollers

Has folding direction of the fold facing inclination, whereby the lateral fold and the edge bead are led to turn over to the right side and thus trouble-free running of the tape and winding the tube is guaranteed.

Other special embodiments of the present invention provide that formed during winding of four band layers locking beads are made narrower than conventional Wickelfalzrohren, so that in the

Connection less material is consumed. Furthermore, material can be saved if the seams are arranged at a reduced distance than in the conventional Wickelfalzrohren, resulting in a greater crest resistance of the tubes results. So can at the same aspired

Strength thinner tapes are used. It can

For example, instead of the usual 0.4 to 0.5 mm thick strips of galvanized steel strips of 0.3 mm thickness can be used to meet the standard given strength

to reach. The same applies to the thicker 0.5 to 0.6 mm strips whose thickness can be reduced to 0.4 mm by the measures listed above.

The subject of the present invention is also a method for producing a rigid Wickelfalzrohres by

helical winding of a profiled

Metal strip. In a first process step, the smooth metal strip is profiled. Subsequently, the metal strip is further deformed during insertion into the tube winding machine. The deformed metal strip is precessed by means of a pressure roller and a guide pin and finally over

Folded connecting rollers to a tube. The present invention furthermore relates to a profiled metal strip which has in each case a lateral fold and an edge bead, the fold being a right-angled isosceles triangle and the edge bead being a trapezoidal depression having an opening angle of 130 ° to 140 °,

preferably about 135 °, are formed, wherein the

Support angle for the fold and the edge thickness each 40 ° to 50 °, preferably about 45 °, amount.

Another object of the present invention is produced in the device according to the invention

Windelfalzrohr whose inner wall has a smooth surface.

In the following, the present invention is based on

Drawings of an embodiment explained in detail. Showing:

Fig. 1 is a schematic section in the direction of

Bandverlaufes by a device according to the invention for producing a spiral duct,

2 cross-sections of different profiling stages of the endless metal belt,

Fig. 3 each have a radial and an axial section through the

Feed roller pair with profiled metal band,

Fig. 4 each have a radial and an axial section through the

Feed roller pair during deformation of the profiled metal strip,

Fig. 5 is a sectional view of the guide pin

(Longitudinal section) when engaging in the deformed

Metal band (cross-section), Fig. 6 each have a radial and an axial section through the

Connecting rollers during winding of the metal strip,

Fig. 7 shows an axial section through the outer connecting roller with two additional, enlarged

Sectional views of sections of the outer

Connecting roller and

Fig. 8 shows the schematic sequence of the folding of the

Endlosmetallbandes to Wickelfalzrohr in one

Cross-sectional view.

FIG. 1 shows, in a sectional view, the device 1 according to the invention for producing a rigid spiral-folded tube, the section being cut in the direction of the FIG

Workflow is performed. The profiled strip 6 is guided by a coil or directly from a profiling plant via a strip guide 12, 13, which consists of two pairs of rolls 12, 13, to the intake roller pair 7, 8 of the tube winding machine 1. In the selected representation, the profile of the metal strip 6 is not visible. The peculiarities of the profile, however, will be discussed later, in particular on the basis of the below

Figures 2 and 8 described in detail. With the help of the feed roller pair 7, 8, the metal strip is further deformed and prepared for the winding process. The profile of the band 6 after deformation will be explained in more detail with reference to the description of Figures 3, 4 and 8. from

Feed roller pair 7, 8, the metal strip 6 via two more pairs of guide rollers 9, 10 to the inlet point in the

Guided winding device, where the two connecting rollers 4, 5 are arranged. The deformed belt 6 passes through an adjustable guide pin 14 and then a

Pressure roller 11. The pressure roller 11 causes a pre-curvature the metal band 6 and the leg of the fold 19a at

The guide pin 14 presses against the leg of the edge bead 20a and thus causes a Vorkrümmung, whereby the correct folding of the edge bead 20a is ensured when connecting the metal strip 6. This process will be described later with reference to FIG. 5

explained in more detail. The connecting roller pair 4, 5 consists of a larger outer connecting roller 5 and a smaller inner connecting roller 4, by means of which the endless metal belt 6 is connected to a tube 2. The connection process itself will be explained later with reference to Figures 6 and 7 in detail. Furthermore, the

Tube winding machine 1 according to the invention circular on

Outside circumference of the wound tube 2 arranged support rollers 3, which determine the guide rollers as the diameter of the wound tubes 2, wherein with the arrangement shown

Diameter especially in the range between 80 and 300 mm can be easily realized.

2 shows schematically the profiling of

Metal strip 6 and the details of one according to the invention

preferred profile. Starting from the smooth and flat

Metal strip 6a is obtained via the intermediate stages 6b and 6c at the end of the profiled metal strip 6d in the form as it is introduced into the tube winding machine according to the invention. The

Profile can be in a single step in one

Profilierungsanlage be generated without doing the

Intermediate stages 6b and 6c must be run through separately. Essential for the present invention is that the

profiled band 6 is lightweight and tightly stackable. This is achieved when the support angle A of the edge bead 20 and the lateral fold 19 between 40 ° and 50 °, preferably about 45 °, wherein the opening angle B is relatively flat and 130 ° to 140 °, preferably about 135 ° , is. Figures 3 and 4 each show a radial and axial

Section through the intake roller pair 7, 8 and give the process when deforming the profiled strip 6 again. The profile of the feed rollers 7, 8 is adapted to the profile of the metal strip 6 to be used during the winding process and has corresponding depressions and elevations in order to further deform the edge bead 20 and the fold 19 of the metal strip 6, wherein the angles favoring the stacking are changed and a Fold 19a and a rim bead 20a are formed, which are suitable to be combined and folded together during the bonding process.

In the figure 5, the operation of the guide pin 14 is demonstrated, with a pre-curvature of the leg of the

Edge bead 20a takes place, so that the edge bead 20a folds over later in the right direction. The guide pin 14 is tapered as one at its insert tip

tapered profiling counter-tool to the pressure roller formed 11. This acts on the fold 19 a what

however, not shown in the present description. The guide pin 14 is advantageously carried out adjustable, which is achieved in a particularly preferred embodiment by a thread, so that the guide pin 14 can be adjusted as a screw for Profilierungsaufgäbe.

In the figure 6 it can be seen that the profiles of

Connecting rollers 4, 5 similar to the profiles of the feed rollers 7, 8 and the deformed, to be wound band 6 are adjusted. The inner and outer connecting rollers 4, 5 each have a profile adapted to the fold 19a on their outer circumference. The outer connecting roller 5 additionally has on the inner circumference a rectangular depression 18 which is provided as a cavity for the folded seam 16 to be formed. Since the recess is formed only on the outer connecting roller 5, while the inner connecting roller 4 is designed as a smooth counterpart, obtained when connecting the metal strip 5, a winding tube 2, which has an inner wall 15 with a smooth surface. An advantageous

Design of the connecting rollers 4, 5 provides that the profile 19a adapted to the profile on the outer circumference of the

Connecting rollers 4, 5 a slight inclination in the

Has the folding direction of the fold 19a, whereby a secure and easy connection of the metal strip 6 is ensured.

Figure 7 shows further details of the outer connecting roller 5, wherein a rounded locking pin 17 can be seen, which protrudes in the center of the recess 18 on the bottom thereof. The function of the recess 18 and the

Verrieglungsstiftes 17 is also demonstrated by means of enlarged sections of the connecting roller 5 shown in Figure 7. It is clear that the locking pin 17 is responsible for a tight and tight compression of the seam 16, which lies completely in the recess 18, so that the inner wall 15 of the tube 2 after the

Folding has a smooth surface and the seam 15 is completely on the outside of the tube 2, wherein the torsional strength of the tube 2 is increased. According to a variant of the invention, not shown, the inner

Connecting role equipped in this way. Depending on the application, the pins on the inner, the outer or on both connecting rollers are used simultaneously.

FIG. 8 shows the sequence of folding of the profiled and deformed endless belt 6 to the spiral-folded tube 2, wherein the fold 19a and the edge bead 20a of the metal strip 6 intermesh and are then folded successively, so that the

Seam 16 in the finished product on the outside of the Windelfalzrohres 2 is located, which has an inner wall 15 with a smooth surface.

LIST OF REFERENCE NUMBERS

1 tube winding machine

2 spiral-folded tube

3 support roller

4 inner connecting roller

5 External connection roller

6 metal band (6a, 6b, 6c, 6d = special versions)

7 pick roller

8 pick roller

9 tape guide

10 tape guide

11 pressure roller

12 tape guide

13 tape guide

14 guide pin

15 inner wall

16 seam seam

17 locking pin

18 deepening

19 fold (19a = special version)

20 edge bead (20a = special design)

A support angle

B opening angle

Claims

claims

1. Device (1) for producing a Wickelfalzrohres (2) by helically winding a

profiled, a lateral fold (19) and an edge bead (20) having metal strip (6) consisting of

a winding device with circular on the outer circumference of the tube to be wound (2) arranged support rollers (3),

one inner and one outer, at the

Inlet point of the band in the winding device arranged connecting roller (4, 5),

a collection roller pair (7, 8) arranged at a distance in front of the connection rollers (4, 5),

one between the connecting rollers (4, 5) and the

Feed roller pair (7, 8) arranged tape guide

(9, 10),

one between the tape guide (9, 10) and the

Connecting rollers (4, 5) arranged pressure roller (11) and

another band guide (12, 13) arranged in front of the intake roller pair (7, 8),

characterized in that

the intake roller pair (7, 8) is designed as a profiling tool and has a the band to be wound (6) aufzuprägendes profile.

2. Device (1) according to claim 1, characterized in that

between the intake roller pair (7, 8) and the

Pressure roller (11) an adjustable guide pin (14) is arranged.

3. Device (1) according to claim 1 or 2,

characterized in that

the guide pin (14) is designed as a tapering on its insert tip, profiling counter-tool to the pressure roller (11).

4. Device (1) according to one of claims 1 to 3,

characterized in that

the profile of the connecting rollers (4, 5) is adapted to the profile of the metal strip (6), wherein the inner and outer connecting rollers (4, 5) each at their

Outer circumference of the fold (19 a) of the metal strip (6) adapted profile and the outer

Connecting roller (5) in addition to its inner periphery of the edge bead (20a) of the metal strip (6) adapted profile.

5. Device (1) according to one of claims 1 to 4,

characterized in that

the profile adapted to the edge bead (20a) on the inner circumference of the outer connecting roller (5) is a rectangular depression (18).

6. Device (1) according to one of claims 1 to 5,

characterized in that

in the center of the rectangular depression (18), projecting beyond the bottom of the depression (18)

rounded locking pin (17) is arranged.

7. Device (1) according to one of claims 1 to 6, characterized in that

the fold (19a) adapted profile on the outer circumference of the connecting rollers (4, 5) has a in the folding direction of the fold (19) facing slope.

8. Method for producing a spiral-folded tube (2)

by helically winding a profiled metal strip (6) in a device (1) according to claim

1 to 6 with the steps:

Profiling a smooth metal strip (6, 6a), deforming the profiled strip (6, 6d) having a fold (19) and an edge bead (20) by means of a draw-in roller pair (7, 8),

Pre-crimping the edge bead (20a) of the deformed metal strip (6) by means of a guide pin (14),

Pre-crimping of the fold (19a) of the deformed

Metal strip (6, 6d) by means of a pressure roller (11) and

Folding the thus prepared endless sheet strip by means of connecting rollers (4, 5) to a

Winding tube (2).

9. Profiled, a fold (19) and an edge bead (20) exhibiting metal strip (6) for the production of a spiral folded tube (2) by helical

Winding the profiled metal strip (6) in one

Device (1) according to claims 1 to 6,

characterized in that

the fold (19) as a right-angled isosceles

Triangle and the edge bead (20) as trapezoidal

Deepening with an opening angle (B) of 130 ° to 140 °, preferably about 135 °, is formed, wherein the support angle (A) of the fold (19) and the edge bead (20) each 40 ° to 50 °, preferably about 45 °. Wickelfalzrohr (2) produced by

helical winding of a profiled metal strip (6) in a device (1) according to claims 1 to 6,

characterized in that

the inner wall (15) of the folded spiral tube (2) has a smooth surface.