HU208646B - Intermediate product for producing tube shapes and tube shape formed from such intermediate product and folded bond formed for these - Google Patents

Abstract

Circular, oval or polygonal, especially rectangular pipes and tube axis oblique end pipe longitudinal sheet material with a bond plate plate cut out of the flat sheet material (21) with a tube shaft parallel edges (2, 3) by chamfering are interconnected. Disk Plate (21) can be sealed by means of elastic shaping into a pipe or pipe together. The plate insert (21) is the tube to be produced, or parallel to the line of the beam, or pipe or pipe edges (22, 23, 24) provided with appropriate longitudinal fractures. The bindings forming longitudinal edges (2, 3) can be joined together are preformed and in pre-seal state providing an additional preform spaced apart. Tube or tubing made from the preform longitudinal clamping in shape and / or tightening to each other it is made of fixed, outward-facing flanges (8, 9). The longitudinal clamp (101) is to be joined edges (103, 104) as a single standing stack facing outwards (105, 107) are preformed. At one end (104) a stopcock border (105) and the other edge (103) and a stopper extending over the stopcock (105) (107). The stopcock border (105) and for pushing the flap (107) to the flange (105a, 107a) parallel to the surface of the tube or pipe (102) a flange (105b, 107b) is connected. The stall (107) The flange (107b) of the flange is longer than the flange of the stack (105) a flange (105b), so it is a protruding portion (107b) on the flange (107b) of the stopper (107) (107c) is formed as a stopcock (105) it can be bent into a circumferential position around the flange (105b).

Description

In the preform for the production of circular, oval or polygonal tubes, in particular rectangular cross-sections, and tubular end sections with a flat sheet material, the sheet sheet cut sheet (21) has edges (2, 3) parallel to the tube axis. connected. The sheet cover (21) can be elasticly closed to form a tube or pipe fitting. The sheeting (21) is provided with a bending parallel to the axis of the pipe or pipe to be produced and longitudinal fractures corresponding to the edges (22, 23, 24) of the pipe or pipe. The longitudinal edges (2, 3) forming the crease bond are interlocked and spaced apart to provide an additional blank during the pre-closure condition.

The longitudinal wrinkling joint of the prefabricated tube or pipe fitting consists of outwardly extending flange flanges (8, 9), which are fixed to each other in shape and / or force.

In the longitudinal crease joint (101), the edges (103, 104) to be joined are formed as a single outwardly extending crease (105, 107). One edge (104) has a standing crease edge (105) and the other edge (103) has a standing crease (107) extending above the upstanding lip edge (105). A flange flange (105b, 107b) parallel to the surface of the pipe or pipe fitting (102b) is connected to the flange folding (105a, 107a) of the stationary crease edge (105) and the stationary crease (107). The crease flange (107b) of the stationary crease (107) is longer than the crease (105b) of the stationary crease (105), so that the crease (107b) of the crease (107) has a protruding portion (107c). ) can be bent into a circumferential position (105b).

HU 208 646 B

Description: 16 pages (including 6 pages)

HU 208 646 Β

FIELD OF THE INVENTION The present invention relates to the manufacture of prefabricated tubes of circular, oval, or polygonal, in particular rectangular cross-section, and tubularly angled end sections with a longitudinal joint of planar sheet material cut parallel to the axis of the tube to be produced. , where the sheeting can be elasticized to form a tube or pipe fitting. The invention further relates to a pipe or pipe fitting made from said preform, and finally to a longitudinal crease bonding between the edges of the preform, wherein the edges to be connected are formed as a single outwardly curved friction.

Currently, prefabricated pipe fittings are transported to the construction site for assembly of pipe systems of larger diameter sheet metal pipes, in particular ventilation and air-conditioning systems, where they are assembled and assembled as desired. Pipe fittings for ventilation and air conditioning systems are generally either rectangular box type tubular sections or coiled metal sheet pipes. The transport of such pipe fittings to the construction site will entail significant transport costs and the risk of damage to existing pipe fittings during transport and loading. For this reason, there are already examples of the manufacturing of ventilation ducts, e.g. winding machines are installed on the site of larger construction sites, thus producing pipes locally.

From AT-PS 321681 there is known a method for joining two surface elements by means of a wrinkle joint.

DE-OS 2558 269 discloses a machine developed for folding joints of a tubular segment consisting of segments, without however providing a more specific reference to the manufacture of the tubular segments themselves.

GB-PS 1536 703 discloses a device for making sheet metal parts, but these sheet parts are not pre-fabricated of pipe fittings. US-PS 4462237 discloses the production of insulating glass spacer frames from a metal strip. Frame sections are formed in a single position with a single rolling action. However, this patent does not disclose any reference to the preparation of preforms that could be made into tubular fittings in a subsequent operation.

US-PS 4805592 discloses the connection of metal plates. According to the proposed solution, tongues are formed on one plate which are first bent and then pushed under the other metal plate. Subsequently, the tongues are bent, simultaneously deforming the edges of the other sheet, thereby creating a force-tight connection between the two metal sheets.

It is an object of the present invention to provide a preform, as described in the introduction, from which simple pipe fittings can be obtained, and then the desired pipe fittings can be formed by tear-bonding the edges parallel to the axis of the pipe or pipe fitting.

The object is achieved by the design and use of the preform described in the introduction, wherein the sheet is provided with a bending parallel to the axis of the pipe or pipe fitting to be produced, and having longitudinal sharpening, fractures corresponding to the edges of the pipe or pipe fitting. the edge of the pre-closure is spaced apart to allow the insertion of an additional preform.

Thus, the cross-section of the preform according to the invention is pre-bent according to the circular, oval or polygonal cross-section of the pipe or tube formed by the forces and moments exerted by the sealing or creasing joint.

One advantage of the preform according to the invention for the manufacture of pipe fittings, in particular pipes, pipe sections, is that it is "stackable", that is, it can be assembled together, so that its transport and storage space is very small. For example, the preforms of the present invention may have a slightly U or C cross-section or section with a curvature preformed about the longitudinal axis.

The preform according to the invention can be made in either round or oval sections as well as in round designs with round corners, usually polygonal sections. Preferably, the curvature of the preform is selected such that, as a result of the folding, which is predominantly elastic deformation, the desired sectional tube shape is obtained. The surface curvature of the open, i.e., free of mechanical stresses, preform is such that, when folded in its closed state, the bending curve corresponds to the desired regular curve, such as a circle or other desired cross-sectional curve or section. Starting from the desired final shape, such as a circular tube, the torque and bending equation for elastic deformation can be used to determine the desired shape of the preform. The gauge shape of the preform is determined by the closing force and the closing condition. In addition, it has to be taken into account that several preforms according to the invention must be interlocked.

In the case of a pipe or pipe fitting made from a preform made according to the invention, the wrinkle joint consists of deformable and / or force-tightly joined wrinkle flanges.

There are various ways of closing the longitudinal edges to make the pre-fabricated pipe. However, it has proven to be advantageous to use a solution similar to conventional folding, which can be implemented without much additional expense. Advantageous and expedient embodiments of the crease binding according to the invention and their features are described in the drawings and are set forth in the dependent claims. A particularly preferred embodiment

In the case of EN 208 646 hossz, one of the longitudinal edges of the preform shall be provided with an outwardly curved flange, and the opposite longitudinal edge shall be provided with a loop-folded flange which receives the outwardly curved flange; the outwardly curved flange is at an obtuse angle to the outer surface of the blank and the center plane of the refracted flange at an acute angle so that the obtuse angle and the acute angle are 180 °.

The present invention also relates to a longitudinal crease joint which is particularly suitable for the simple stiffening of the edges of the longitudinal edges along a prescribed line or even two preformed edges of the flat plate when forming a pipe section from the preform.

A known solution for attaching two longitudinal edges to a simple standing scrubber is described in AT-PS 321681. However, in order to form this known crease bond, pressure rollers must be used on both sides of the plates to be joined or on both sides of the crease bond. As a result, the known fold bond cannot be created by a simple manual assembly operation requiring only a hand tool.

Known pre-fabricated or preformed flange flanges are generally difficult to fit by hand only. This requires a more open construction than is known. Prior art solutions generally provide a protruding crease flange around which a folded crease flange can be compressed by compression rolling, especially when it is required to form a sealed crease joint.

A further object of the present invention is thus to provide a sufficiently resistant tear joint for joining the edges of sheet metal tubes and similar sheet structures which allows easy connection of the edges to be joined and subsequent insoluble attachment to each other. The wrinkle joint must be such that the machine-formed wrinkle edges can be connected to each other in a form-locking manner, and then the wrinkle joint can be locked and secured using a simple hand tool. Preferably, the crease joint to be formed should allow the edges of the preforms of the present invention to be joined together during their forming into a tube.

This object is achieved in all respects by the special crease binding according to the invention, which has preformed crease edges formed along the longitudinal edges to be joined and which has at one end a stiffening edge and at the other an overhanging edge over the stiffening edge; a crease flange parallel to the surface of the tube or pipe fitting is connected to the fold-back flap of the stationary crease and the crease of the stationary flap, finally having a crease edge of the crease longer than the crease edge of the crease, with a protrusion it can be bent into a position around the edges of the edges.

Accordingly, the present invention provides one of the longitudinal edges to be joined to one another with a stiffener provided with a protruding portion and the other with a stitching edge that can be connected therewith. The edges to be connected to each other assume their final position when the edges of the crease are joined. The longitudinal crease joint of the present invention becomes shape-tight by bending the protruding portion of the protrusion.

In fact, the wrinkle bond according to the invention provides a folded connection in two planes. One plane (the plane of the flange flange) protrudes at an angle to the wall of the pipe or pipe fitting or to the plate members to be joined, while the other plane is substantially parallel to the pipe or pipe fitting or plate plane and retains this plane in its bent position and the folded relationship between the stiffeners edge and stiffeners. The longitudinal friction joint can be preformed very easily by machine and can be reliably secured with a simple hand tool to connect the longitudinal edges of pipe sections or even flat panel members.

Preferably, the longitudinal crease joint of the present invention can be configured so as not to interfere with the assembly or connection of tube sections. To this end, it has been found advantageous to have an outwardly embossed, substantially roof-shaped rib at one end and an inwardly embossed, substantially roof-like recess-like rib at the other end, the end region of the encampment stiffening being about the roof-like, outwardly protruding the pipe end being offset at approximately the correct distance from the wall thickness, while the end of the pipe end is offset at an approximately equivalent extent to the wall thickness of the pipe member at the depressed portion of the inwardly pressed, substantially roof-shaped recess. Because the ends of the longitudinal crease joint in this embodiment end before the end regions of the roof-shaped ribs, they do not interfere with the embossed or deepened ribs. This is further facilitated by measures that advantageously have a flat section parallel to the peripheral surface of the pipe fitting, and that an overlapping portion of the longitudinal edges at one end of the pipe is offset at a distance approximately equal to the material thickness of the pipe fitting. the overlapping section of the longitudinal edges being offset inwardly at a distance corresponding to the material thickness of the pipe fitting at the other longitudinal edge. If one end of the tube is provided with an obliquely outwardly flanged end and the other end with an obliquely inwardly flanged end, two or more successive pipe sections can be joined together in a very simple manner and secured by the otherwise inventive longitudinal folding joint. As a result, pipe connections can be made very simply and quickly.

When working with embodiments in which the protruding portion of the stationary crease is folded back to the edge of the stationary crease in the pre-tearing condition, or the collar of the encircling stationary crease is folded back

EN 208 646 Β is positioned approximately parallel or at least approximately perpendicular to the surface of the pipe element adjacent to the wrinkle joint, so that the edges of the pipe shell to be joined by wrinkling can be hooked to each other prior to attachment. A tubular blank preformed to a diameter greater than the actual final tube diameter during the pre-fabrication process behaves in such a way that the pre-tension inside it tends to pull the crease edges together, so that it is not even hooked . By bending the protruding part, that is, after the actual closed friction connection is made, the shape-locking connection of the elements or edges becomes resistant to external forces and is insoluble without destruction.

In addition, the protruding crease flange, i.e. the joint of the flanges and the locking edges folded thereon, i.e. locally deformed, is additionally provided to prevent longitudinal displacement of the longitudinal joint so as to exclude any possibility of their relative displacement. The same effect can be achieved by corrugating the stiffeners or by welding the stiffening edges forming the stiffeners and the sealing edges that are substantially parallel to the component of the tubular element, i.e. the protruding part, by spot welding, riveting, or at least in some known manner.

The invention will now be described in more detail below with reference to the accompanying drawings and the detailed description of exemplary embodiments thereof. From the drawings

Figure 1 is a schematic diagram of a preform for a circular tube;

Figure 2 is a schematic diagram of a preform of a rectangular section;

Fig. 3 is a view showing a crease bond;

Figure 4 is a top view of the crease bond of Figure 3;

Figure 5 shows a notched knuckle joint with notches;

Figure 6 is a detail view showing a top view of the crease bond of Figure 5;

Figure 7 shows sections of longitudinal edges preformed for creasing;

Figure 8 shows another type of wrinkle bond;

Figure 9 shows a detail of a vent pipe system composed of pipe segments;

Figures 10 and 11 are perspective drawings for making pipe segments;

Figure 12 is a cross-sectional view of a preform of a rectangular tube according to the invention;

Figure 13 is a cross-sectional view of a pipe section formed from the preform of Figure 12;

Figure 14 is a sectional view taken along line XIV-XIV of Figure 15;

Figure 15 is a sectional view taken along line XV-XV of Figure 14;

FIG.

Figures 17 and 18 are sectional views of two possible characteristic states of the longitudinal wrinkle joint prior to retracting the protruding portion of the stationary crease;

Fig. 19 is another embodiment of a longitudinal fold bond according to the invention;

Figure 20 is a schematic diagram illustrating the connection of two pipe sections to each other; finally

Figure 21 is a schematic outline of one of the pipe fittings of Figure 20.

The preform (20) shown in Fig. 1 is approximately bent to form C and has a longitudinal edge (2) with a folded fold (8) and another longitudinal edge (3) provided with a protruding fold (9). In Fig. 1, the preform (20) is bent to form a cylindrical tube formed by a dashed line, approximating the longitudinal edges (2, 3) and then inserting the longitudinal edges (2, 3) into the folded fold edge (8). with a folded bond (1) connected to each other. In its initial state free from mechanical stresses, the preform (20) is less bent in the middle region between the longitudinal edges (2, 3) than in the regions adjacent to the longitudinal edges (2 and 3). Namely, during bending, i.e. turning into a pipe fitting, much greater bending torques occur in the middle region than in the regions along the longitudinal edges (2, 3), so that the middle region is more deformed than the extreme regions. However, as a result of the different bending of the preform (20) to varying degrees, the tube formed by folding will have a regular circular cross-section.

The preform (21) shown in Figure 2 can be converted into a rectangular tube. The edges (22, 23 and 24) of the pipe fitting (21) are bent at the preform (21). The flat surfaces themselves can also be bent as shown by the dashed line in Fig. 2, showing the preform (21), whereby flat surfaces are formed when the preform (21) is formed into a rectangular section. The flat surfaces between the longitudinal edges (22,23 and 24) of the preform (21) are more bent than the flat surfaces adjacent to the longitudinal edges (2, 3), since these former flat surfaces undergo greater deformation during pipe forming. It is also shown in Fig. 2 that the angles (a) of the flat surfaces meeting at the edges (23) are larger than the angles (β) of the planar surfaces meeting at the edges (22 and 24). The fourth longitudinal edge of the rectangle in this embodiment is formed by the crease bond itself (1).

Of course, it is also possible to produce preforms for rectangular, in particular square or rectangular, pipe sections in which the crease joint (1) is formed on one of the adjacent flat surfaces (see, for example, Figures 12 and 13).

Fig. 3 is a schematic diagram of a wrinkle joint (1) connecting two longitudinal edges (2, 3) of the preform (20) formed into a tube. The folded fold flange (8) on the longitudinal edge (2) below the acute angle (δ)

EN 208 646 Β projecting, while the flange flange (9) is formed on the longitudinal edge (3) so that it extends from the tangential plane at an obtuse angle (γ) complementing the sharp angle (δ) of the flange flange (8) (see Fig. 7). .). The longitudinal edges (2,3) overlap along a common baseline (4). The crease bond (1) is prevented from dissolving or being stretched by corrugating the crease flange (8), as is clearly shown in FIG.

Figures 5 and 6 show another way of securing the wrinkle bond (1) to be extended or dissolve. The folded crease flange (8) formed along the longitudinal edge (2) and the corresponding creased edge (9) of the longitudinal edge (3) are divided into sections (5 and 6) with transverse cuts (5 and 6) alternately bent in opposite directions.

Fig. 8 shows a non-creasing joint in which the longitudinal edges (2, 3) are formed substantially identically with right-angled edges (11 and 12) which, when joined, are formed by a U-section (10) cut from a continuous strip of sheet metal. , holds or holds a profile strip. The edges (11 and 12) of the longitudinal edges (2 and 3) are clamped to one another with their faces, and the coupling (10) is pulled onto them. This bond can also be secured against dissolution by the solution shown in Figures 3 and 4, e.g. by bending the edges (11, 12). The additional anti-dissolution protection of Fig. 8 can of course also be achieved by the solution of Figs. 5 and 6, but such that the notches 7 end at a distance from the longitudinal edges of the coupling 10, so that the continuity of the coupling 10 is at least partially retained.

Figure 9 is a detail view of a vent pipe system (25) formed of preforms (26) of the present invention. The pipe fittings (26) are formed from the sheet guides (29) shown in Fig. 10. The cut edges (27 and 28) of the tablecloths (29) are formed and disposed so that the complementary corrugations and corrugations are opposed. From such sheet guides (29) shown in Fig. 10, tubular shapes (26) can be formed with ends at oblique planes relative to the axis.

Fig. 11 illustrates rectangular plate portions (29) formed on tubular members (26) also having an end (26) having an oblique plane relative to the axis. In this embodiment, the cutting edges (27) consist of straight segments with multiple broken guides in accordance with the rectangular section. For other other pipe fittings, especially polygonal pipe fittings, it is understood that sheet discs can be formed.

The preform (31) or sheeting shown in Figure 12 is configured to produce a rectangular tube of rectangular cross-section as shown in Figure 13. In this embodiment, the crease joint (41) is located in the center of one of the flat surfaces of the pipe fitting and is recessed.

The surfaces (32, 33, 34, 35 and 36) are preformed such that the surface (32) is most strongly bent, the surface (33 and 35) is slightly bent, and the divided surface (34, 36) is least bent . The rounded longitudinal edges (37,38,39 and 40) are also folded on the preform (31), where the edges (39 and 40) are bent more strongly than the edges (37 and 38), i.e., β <α .

After the preform (31) is formed into a tubular section (folded) and a crease joint (41) is formed, it has regular, uniformly flat surfaces (32, 33, 34, 35 and 36) and equally longitudinal edges (37, 38,39 and 40). 13, which is illustrated in Figure 13 in the form of a line sketch.

The pipe fittings of the present invention are particularly advantageous for use as fire liners as components for combustion ducts and for thin-walled pipe systems. In addition to flat metal sheets, the preforms can be formed from any other suitable flat material, such as laminated sheets or plastic coated metal sheets.

Fig. 14 illustrates a longitudinal creasing joint (101) of the invention formed for a pipe (102), which is particularly advantageous for use in the embodiment of Figs. 1 to 4, the preforms according to the invention described above in connection with Figs. The longitudinal creasing joint (101) consists of a standing crease edge (105) formed along the longitudinal edge (104) and a raised crease (107c) provided with a protruding portion (107c) formed along the longitudinal edge (103) of the tube (102). The stiffening edge (105) itself is preferably formed by a flap (105a) with an angle of less than 90 °, in particular at an angle of 60 °, with the wall of the pipe (102) and a wall of the pipe (102) attached thereto. consisting essentially of a parallel flange (105b). The flange retraction (105a) and the flange flange (105b) of the stiffener flange (105) are configured to conform to the flange flange (107a) and the flange flange (107b) of the stiffener (107) so that they are aligned with each other and protruding only can be secured in position. The crease flange (107b) with the protruding portion (107c) of the stiffening crease (107c) and the folding (107a) of the flange (107a) are almost seamlessly externally aligned with the creasing flange (105b) and the flap folding (105a). In order to permanently seal the crease joint (101), the closure edge (107c) must be bent back around the rim edge (105b) substantially parallel to the wall of the tubular member (102b).

Figure 15 is a view of the longitudinal crease joint (101) of the present invention and the connection of two adjacent interconnected pipe sections (102). Fig. 15 is a sectional view taken along line XV-XV in Fig. 14. It can be seen that the curved projection (107c) of the stationary crease (107) does not extend to the ends (109, 110) of the tubular elements (102), but ends at a predetermined distance thereon, at positions (128). Ugyan5

At these locations, the crease flange (105b) of the upright edge (105) ends around which the protruding portion (107c) of the upright (107) is bent. Thus, the region of the longitudinal crease bond (101) comprising the creasing relationship of the crease (105b) of the crease (105b) of the crease (105) with the crease (107b) of the crease (107) by bending the protruding portion (107c). 109, 110) ends at defined distances. The end regions (111, 112) of the longitudinal crease joint (101) extend obliquely to the circumferential surface of the tube (102) which is reached shortly before the ends (109, 110), where the longitudinal edges (103, 104) overlap.

The design of the end regions (111 and 112) of the longitudinal crease joint (101) in the vicinity of the end (109 and 110) of the pipe (102) has the advantage that the splice joints of the two pipe (102) described below are no longer present. 101) the total thickness of the longitudinal crease joint allowing partial overlapping of two pipe sections (102).

Fig. 16 is a schematic diagram of a sheeting material which may be used to form a tubular member (102) of the present invention by a longitudinal fold bond (101) of the present invention. As can be seen in Fig. 16 again, the protruding portion (107c) of the standing crease (107) and the creasing edge (105b) of the standing crease edge (105) do not extend to the transverse edge of the sheet fin defining (102). A tapering end region (115, 116) is connected to the flange fold back (105a) and the flange flange (107b) of the stationary crease edge (105), each of which has an oblique outer edge edge (115, 116) of the pipe member (102). , 110), they extend to the fold line of the flap (105a), shown in dashed line in Fig. 16, and terminate at a certain distance before the ends (109, 110).

Similarly to these end regions 115, 116, the outer oblique edges defining the end regions 111 extend from the protruding portion 107c of the stiffening crease 107 to the ends 109,101. The end regions (111, 112) also have regions (119, 120) corresponding to the other regions (115, 116) on the other side, which, after the longitudinal fold (101) is formed and closed, overlap with the end regions (115, 116). The bending lines of the surface portions of the stationary crease (107) and the protruding portion (107c) are shown in Figure 16 with dashed lines.

In order to allow two adjacent, successively extending pipe sections (102) to be connected in a form-locking manner, the ends (109 and 110) of the pipe sections (102) are provided with approximately roof-shaped ribs (113, 114). ), the rib (113) extending upwards or outwardly, while the rib (114) at the end (110) is depressed in a recess-like configuration (Fig. 15). For the connection of two pipe fittings (102), this design provides a very favorable flange-like form-locking connection.

Since the material of the end regions (111, 112) and the wall of the pipe member (102) are disposed at the ends (109, 110) of the pipe member (102) in the region of the longitudinal crease joint, this double wall thickness is provided by two adjacent pipe members (102). should be taken into consideration for the flanged, flanged joints. This can be done by depressing a portion (117) at the end (109) of the roof-shaped recess (113) at the end (109) of the tube (102) around the longitudinal joint (101) and the tube (102). At its end 110, an embossed portion 118 is formed around the width of the longitudinal crease bond (101) around the edge (104). As a result, the tubular sections (102) are continuously extensively coupled to each other without being hindered by double local wall thickness in the region of the longitudinal joint (101), i.e., maintaining the cylindrical cross-section and thereby providing essentially no joint.

Figures 17 and 18 show intermediate technological phases of the longitudinal crease bond (101) shown in Figure 14, which are typical of the operational phases following the joining of the stationary crease (107) and the stationary crease (105).

In the operation phase shown in Fig. 17, the protruding portion (107c) of the stationary crease (107) extends substantially parallel to the crease edge (105b) of the stationary crease edge (105), while the operation phase (107c) the protruding portion is bent in a substantially perpendicular position to the wall of the pipe fitting (102). Both of these pre-curved phases have the advantage that, when the longitudinal crease joint (101) is formed or the two pipe sections (102) are extensively connected to one another, the stiffener (105) fits into the stiffener (107) containing the bent portion (107c). provides a position-locked connection prior to final closure, making it easier and more convenient to perform the various adjustment and adjustment operations that may be required before final closure. The main advantage is that the overlapping longitudinal edges (103, 104) are already substantially free of gaps and are firmly overlapping and remain there when the longitudinal crease bond (101) is not yet permanently fixed or closed.

A19. Fig. 10A shows an exemplary longitudinal crease joint (101) in which the crease edge (107b) parallel to the wall of the pipe section (102) and the curved protrusion (107c) of the stiffener (107) around the longitudinal edges (103,104) (105b) is corrugated as shown by the dashed line in the figure. Corrugation is achieved by locally alternating folding flanges (105b and 107b) and protruding portions (107c) in a localized manner in and out of the pipe piece (102). This makes it even more resistant to longitudinal stresses6

HU 208 646 Β a permanent bond is obtained. Instead of or in addition to corrugation, it is also possible to increase the resistance of the joint by locally fixing the flange by spot welding, riveting or the like.

Fig. 20 shows another exemplary embodiment for connecting two pipe sections (102) to one another. The accompanying drawing, shown in Figure 21, clearly shows that there is a surface step (121) from the end region (111) and (112) of the stationary cornice (107) and from the end region (115, 116) of the stationary cornice (105) a flat section (129) extending to the end (109) and (110) of the pipe section (102), the flat section (121) extending to the end (109) of the section (102) forms a surface step with the wall of the section (102) it is parallel but protrudes from its plane as shown in FIG. Thereby, it is possible for the end (110) of one tube (102) to be overlapped to overlap the end (109) of the other (102).

As already mentioned in the description of Figures 15 and 16, the pipe fitting (102) of Fig. 20 is the stationary seam (107) and the stationary seam edge (111, 10) of the overlapping region of the longitudinal edges (103, 104). and (116) also has an outwardly projecting or offset (122) overlapping area and an inwardly offset (123) overlapping portion. Thus, twice the wall thickness due to the overlap of the longitudinal edges (103, 104) is evened out, and the tubular sections (102) can be joined substantially seamlessly.

To further facilitate the sliding of the tubular fittings (102), the end (109) of the tubular member (102) is provided with an outwardly sloping flange (124) and the end (102) of the tubular member (102) is provided with an inclined flange (125). , and thus the end (110) can be more easily introduced into the end (109).

At the end (110) of the tube (102) a hemispherical outwardly extruded protuberances (127) are formed in the flat region (129) near the end region (112) of the stiffeners (109), which are spaced at uniform intervals by the tube member (102). a circumferentially extending portion of its circumference extending in the immediate vicinity of a longitudinally extending edge (104) of a circumferentially extending portion (123). These bumps (127) are intended to prevent overlapping of two adjacent tubular sections (102) that are to be connected in an extensively overlapping manner.

The wrinkle joint according to the invention, which is described in more detail above, can be used for pipes such as ventilation pipes, insulating pipe sheaths, but also for flat plates, especially flat plates for sheet metal roofing.

Claims (29)

PATENT CLAIMS 1. Preforms for producing tubes of circular, oval or polygonal, in particular rectangular cross-section, and tubular ends with an oblique end relative to the axis of the tube, wherein the sheet material cut out of the flat material is interconnected at its edges parallel to the axis of the tube to be produced. wherein the sheeting can be elasticly formed into a tube or tube, characterized in that the sheeting (20, 21, 29) is formed by bending parallel to the axis of the tube or tube to be produced and by longitudinal fractures corresponding to the edges of the tube or tube; the longitudinal edges (2, 3) forming the tuft bond are interlocked and spaced apart to provide an additional preform in the pre-closure state. (Priority: 04-09-1990) Preform according to Claim 1, characterized in that, in order to produce circular or oval cross-sectional tubes or pipe fittings, the sheet has a radius of curvature which is greater in the middle than in the vicinity of the longitudinal edges (2, 3). (Priority: 04/09/1990) Preform according to Claim 1, characterized in that the surfaces (32,33,34, 35, 36) of the planar sides of the cross-section are bent in the opposite direction of the closure direction for producing polygonal tubes, in particular rectangular sections. . (Priority: 09.04.1990) Preform according to claim 3, characterized in that the center surface (32) of the sheet cover (31) is bent more strongly than the surfaces (33, 35) near the longitudinal edges (2, 3), and -the angle (a) of the angles (α, β) of the two adjacent surfaces (32, 33, 34, 35, 36) at the longitudinal fractures (37, 38, 39, 40) at the middle fractures (37,38) , than the angle (β) at fractures (39, 40) closer to the longitudinal edges (2, 3). 5. A preform according to any one of claims 1 to 3, characterized in that the sheet cover (20, 29, 32) is formed from a rectangular sheet. (Priority: 09.04.1990) The preform according to claim 1, characterized in that the edges (27) of the sheeting (29) have a wavy contour between the edges (27) of the sheeting (29) for producing a circular cross-section and a bevelled end to the axis of the tube, the tides and the tides are always opposite each other. (Priority: 09.04.1990) The preform according to claim 1, characterized in that the polygon, e.g. for producing tubular sections of rectangular or square cross-section and inclined to the axis of the tube, the cut edges (27) of the sheeting (29) have a rectangular contour consisting of forward and backward edges between cutting edges (28) parallel to the axis; the sections are always opposite each other. (Priority: 09.04.1990) 8. The precursor of any one of claims 1 to 7 EN 208 646 Β, characterized in that one of the longitudinal edges (2) of the sheeting (20, 21, 29) to be connected by a tongue-and-groove joint (1) is looped back and the other longitudinal edge (3) is straight down is bent. (Priority: 09.04.1990) 9. A preform according to any one of the preceding claims, characterized in that the center plane of the loop-folded fold edge (8) at one of its longitudinal edges (3) has an acute angle (δ) and the outwardly curved fold edge (9) at its opposite longitudinal edge (2). ) closes with the outer surface of the preform, where the two angles (γ, δ) complement each other by 180 °. (Priority: 09.04.1990) 10. A preform according to any one of claims 1 to 4, characterized in that a crease flange (11, 12) is formed at right angles to the longitudinal edges (2, 3) of the sheeting material (20, 21, 29) and that it can be pushed onto these abutting crease flanges (11, 12). , there is a U-shaped profile section (10) which clamps and engages them. (Priority: 04-09-1990) 11. A pipe or pipe fitting according to any one of claims 1-10. Prefabricated prefabricated product according to any one of Claims 1 to 4, characterized in that its longitudinal crease bond (1, 41) consists of outwardly extending crease edges (8,9) which are fixed to one another on the shape and / or force. (Priority: 09.04.1990) Pipe or pipe fitting according to claim 11, characterized in that the outwardly extending flange flanges (8,9) are alternately bent in one direction and the other. (Priority: 04/09/1990) Pipe or pipe fitting according to claim 12, characterized in that the folds (8, 9) of the crease bond (1) are bent in the form of a wavy line after being closed. (Priority: 04-09-1990) Pipe or pipe fitting according to claim 11, characterized in that the joint (1) has recesses (7) spaced apart, and that the sections (5, 6) of the joint (1) alternate with one of the recesses (7). and then bend in the other direction. (Priority: 09.04.1990) 15. A longitudinal crease bond according to FIGS. The edges of the blank according to any one of claims 1 to 14, in particular those of claims 11-14. For joining into a pipe or pipe fitting according to any one of claims 1 to 4, wherein the edges to be connected are preformed as a single standing crease extending outwards, characterized in that one edge (104) has a standing crease edge (105) and the other edge (103) and a stiffening flange (105b) extending parallel to the surface of the pipe or pipe fitting (105b) to extend the flange (105a, 107a) of the stiffening edge (105) and the stiffener (107). , 107b), finally, that the crease flange (107b) of the stationary crease (107) is longer than the crease edge (105b) of the stationary crease (105), so that a protrusion (107c) is formed on the corpus flute (107b) of the stationary crease (107), which can be bent into a position around the crease flange (105b) of the stationary crease edge (105). (Priority: November 20, 1989) A longitudinal crease joint according to claim 15, characterized in that the flange retraction (105a) of the upright edge (105) and the flute retraction (107a) of the upright edge (107) are identical to the surface of the pipe or tube (102) angle. (Priority: 11.20.1989) An elongated wrinkle joint according to claim 15, characterized in that the protruding portion (107c) of the upright (107) and the wrinkle flange (105b) of the upright edge (105) are provided on the edges (103, 104) of the pipe or tube (102). and that the end regions (111, 112, and 115, 116) of the stationary crease border (105) and the stationary crease (107) extend towards the ends (109, 110) of the edges (103, 104) , where they lie on the surface of the pipe or pipe fitting (112). (Priority: November 20, 1989) The longitudinal crease joint according to claim 17, characterized in that the end regions (115, 116) of the stationary crease edge (105) projecting to the wall of the pipe or pipe fitting (102) end at a distance from the ends (109, 110) of the edges (103, 104). (Priority. November 20, 1989) A longitudinal joint according to claim 17 or 18, characterized in that one end (109) of the pipe or tube (102) has a roof-shaped, outwardly shaped rib (113) and the other end (110) is also a roof-shaped rib. furthermore, that the end region (111) of the stationary crease (107) is offset by the material thickness of the pipe or tube (102) in the region of the outwardly shaped rib (113) and finally that the end (110) of the tube or tube (102) is offset by the material thickness of the tube or tube (102) in the region of the roof-shaped inwardly shaped rib (114) and the edge (118) . (Priority: November 20, 1989) A longitudinal crease joint according to claim 19, characterized in that the roof-shaped rib (113,114) of the tube or tube (102) is inserted into one another. (Priority: 1989. 11:20.) A longitudinal crease joint according to claim 18, characterized in that one end (109) of the tube or tube (102) has a flat section (121) parallel to the wall or surface of the tube or tube (102), wherein the tube and, at one end (109) of the pipe fitting (102) at the overlapping section (122) of the edges (103, 104), the section (122) extends outwardly of the pipe or pipe fitting (102), and at the other end (110) of the pipe fitting (102) at the overlapping section (123) of the edges (103,104), the section (123) is offset inwardly by the thickness of the pipe or pipe fitting (102). (Priority: November 20, 1989) Longitudinal creasing joint according to claim 21, characterized in that the tube or tube (102) has an endwardly flanged outwardly flanged recess (124) at one end (109) and a sloped inwardly flanged flanged recess (125) at the other end (110). is equipped. (Priority: November 20, 1989) A longitudinal wrinkle joint according to claim 21 or 22, characterized in that the end portion inverted towards the end (110) of the pipe or pipe fitting (102) (126), the width of the pipe or pipe fitting (102) is evenly distributed along the circumference of the pipe or pipe fitting (102), approx. hemispherical bumps (127) formed out of the material of the tube or tube (102). (Priority: 11/20/1989.) 24. A 21-23. A longitudinal crease joint according to any one of claims 1 to 4, characterized in that, when two tubes or tube (102) are connected to one another, the end (110) of one tube or tube (102) is inserted into the end (109) of the other tube or tube (102). (Priority: November 20, 1989) 25. A 15-24. The longitudinal crease bandage according to any one of claims 1 to 4, characterized in that the protruding portion (107c) of the stationary crease (107) is parallel to the flap retraction (105) of the stationary crease (105a) and the fold (107a). direction. (Priority: November 20, 1989) 26. A 15-24. A longitudinal crease joint according to any one of claims 1 to 3, characterized in that the protruding portion (107c) of the upright (107) is at right angles to the surface of the tube or tube (102) prior to the creasing operation. (Priority: November 20, 1989) 27. A 15-26. Longitudinal crease bond according to any one of claims 1 to 4, characterized in that the crease edges (105b, 107b) of the crease edge (105) and the crease (107) parallel to the surface of the pipe or pipe fitting (102) are fastened to one another in sections. (Priority: November 20, 1989) A longitudinal wrinkle joint according to claim 27, characterized in that the wrinkle flanges (105b, 107b) extending parallel to the surface of the pipe or tube fitting (105b) and the standing wrinkle (107) and the protruding joint (107) extend. (107c) are corrugated. (Priority: 11.20.1989) 29. A 15-26. Longitudinal crease bond according to any one of claims 1 to 3, characterized in that the crease edges (105b, 107b) and the protruding portion (107c) of the upright edge (105) and the upright (107) parallel to the surface of the pipe or tube (102) ) are fixed to each other by spot welding, riveting or similar. (Priority: November 20, 1989) HU 208 646 Β Int Cl ⁵ : B 21 C 37/06