CH647308A5 - Process for the clamping connection of composite profiles, metal profile for carrying out the process, and composite profile produced by said process - Google Patents

Description

647308 2

PATENT CLAIMS (2,3) in the direction away from the metal profile body (11)

1. Method for clamping connection of a metal profile lying next to each other.

(1) with a plastic profile (4) for composite profiles, whereby the plastic profile (4) between two longitudinal profile

webs (2, 3) of the metal profile (1) 5

The invention relates first to a method for plastically bending one (2) of the two webs (2, 3) by clamping connection of a metal profile with a plastic and an imaginary profile also running in the longitudinal direction of the profile in composite profiles with the Features of the upper bending axis (7) is permanently clamped, thereby characterized in claim 1.

indicates that the bending web (2) is bent so far until i0 composite profiles are mainly used to produce a heat-free end (10) such as the window or door frame insulated against the plastic profile (4). It assumes the best dead center position on the bending arc (6). made of two metal profiles, in particular aluminum professional

2. Metal profile for carrying out the method according to len, which are formed by forming a gap between them claim 1, characterized by a transition web (12) by at least one plastic profile firmly interconnected between the bending web (2) and the metal profile body 15, the Plastic profile by Klemmver- (11), wherein the wall thickness (13) of the transition web (12) bond is attached to the metal profiles. The plastic is at least partially smaller than that of the turning web (2). profil has the task of creating a unity between the two

3. Metal profile according to claim 2, characterized gekennzeich- metal profiles without the formation of a heat or cold bridge that the transition web (12) by one of the to create the.

In the case of a known composite profile of the type introduced at the beginning of the fixed end (14) of the bending web (2) (DE-OS 26 08 299), the clamp connection is made second, In the longitudinal direction of the notch (15) or viewing a metal profile and a plastic profile a cut is formed. of the two webs of the metal profile through plastic cold

4. Metal profile according to claim 2 or 3, characterized in its initial position against the mostly something that the front edge (19) of the 25 elastic plastic profile pressed in the direction of bending.

free end (10) of the turning web (2) broken, in particular- The bent web is fixed - if necessary, which is beveled. while displacing the material of the plastic profile

5. Metal profile according to claim 4, characterized gekennzeich- the plastic profile and clamps this between itself and net that the bevel over the entire width of the counterpart. In order for this clamping connection to permanently extend the bending web (2) in such a way that it is designed in the turning direction, it is necessary that the bent web, the rear edge (20) of the free end of the turning web (2) maintains a final bending position, So not - for example, and the apex of one of the bending webs (2) through the end face at the free end (10) ter of the compressed plastic profile and the backward pressure in the turning direction - again against its turning flank of the turning web (2 ) included pointed spring direction is rebounded or bent back. To form a sol-kels. 35 To avoid looseness of the clamp connection

6. Metal profile according to one of claims 2 to 5, characterized in that the bent web has an elastic springback or characterized in that at least the minimum wall thickness preventing bending back in the bending direction has a tere edge (20) of the free end (10) of the bending web (2) in addition, its transition must be serrated in the longitudinal direction of the wall thickness. moderately thicker metal profile from such

7. Metal profile according to one of claims 2 to 6, characterized by 40 wall thickness in that it also indicates a spring back or tension that prevents bending back to the fixed end (14) of the bending web, that is to say permanent plastic deformation.

(2), guaranteed approximately at right angles to this and from the metal profile body. These necessities require high (11) protruding, a pressure web (21) is molded. Processing pressures for turning the intended

8. Bridge produced by the method according to claim 1.

Composite profile, characterized in that the object of the invention is to form a free end (10) of the type mentioned in the introduction, which acts on the plastic profile (4) in such a way that the bending web (2) with its fixed End (14), for example in the direction of the web, may also have a comparatively small minimum wall-median longitudinal plane on the metal profile body (11) without the support being in later use. Composite profile a spring back of the clamp connection

9. composite profile according to claim 8, thereby marked so to fear. This object is achieved by the fact that the side walls (16, 17) of a marker web (2) and the metal profile body (11) arranged between the part of patent claim 1 and the metal profile body (11) are arranged.

Place the notch (15) together. First of all, the invention has the advantage that

10. Composite profile according to claim 8 or 9, characterized by a comparatively small wall thickness which indicates that the contact area (24) of the deformation end (10) required with its free bending of the affected web acts on the plastic profile (4) Footprints can be reduced. To ensure the bending web (2) in relation to the contact area (25) of the other complete task solution and the resulting non-bent web (3) in a right angle to the advantages, it is not absolutely necessary for the plane running in the longitudinal direction of the profile to be offset is. Position the free end of the bent web exactly the dead

11. Composite profile according to claim 10, characterized 60 point position on which extends around the imaginary bending axis by a mutual offset (23) between the one with its bending circle arc. There may also be slight ab-nem free ends (10) acting on the plastic profile (4) - deviations to one or the other side. We-den bending web (2) and the other web (3) in such a way that is essential for the inventive concept only that in the fer-contact area (25) of the other web (3) on the metal-composite profile that of the plastic profile outgoing profile body (11) facing away from the contact area (24) 65 resilient return pressures with their pressure resulting in the bending web (2). essentially in the plane of the

12. Composite profile according to claim 10 or 11, thereby locating bent webs and thus not feeling that the contact areas (24, 25) of both webs bare, in the bending direction effective drain component

are able to exercise. It can even be advantageous if, in certain cases, the web in question is bent beyond the dead center position described. By slightly springing back the bent web from its bending end position or by a tensile load on the plastic profile in the direction away from the metal profile, the bent web would then again approach the dead center position and thereby only increase the clamping pressure. In a way, this would result in a self-locking clamping effect between the metal profile and the plastic profile.

The further invention relates first of all to a metal profile, in particular an aluminum profile, for carrying out the method according to claim 1. The characteristic feature of patent claim 2 enables the bending pressures required to carry out the bending process to be reduced even with a larger cross-sectional thickness of the web to be bent. Because of the reduced wall thickness, the bend in the area of the transition web is automatically carried out. The position of the transition web makes it possible to constructively predetermine the position of the imaginary bending axis of the web to be bent. This is because the bend will always take place in the area of the weakest dimension in terms of wall thickness.

Due to the characterizing feature of claim 4, the bending axis can be shifted in the direction of the side of the web to be bent away from the bending direction such that a transfer of the web to be bent into the aforementioned dead center position and possibly beyond is facilitated when the method is carried out.

When using a metal profile with the characterizing features of claim 4, the restoring forces acting on the web to be bent and counteracting the bending can be reduced when carrying out the process during the bending process on the part of the plastic profile. As a result, the end face of the leg to be bent can slide like a skid over the contact surface of the plastic profile during the bending process, without displacing excessive material of the plastic profile, as is inevitably caused by the approach of the bent leg in the direction of the plastic profile during the bending process. When the metal profile is designed according to the characterizing part of patent claim 5, the free end of the web to be bent can be designed in a cutting-like manner in such a way that it barbs into the plastic profile like a barb in the bending end position. In a design of the metal profile according to the characterizing part of claim 6, a positive clawing of the free end of the web to be bent into the plastic profile can be made even more effective, while at the same time reducing the amount of displaced plastic material and thus the amount to be overcome during the bending process, from Plastic profile outgoing resistance pressure can be reduced.

By designing the metal profile according to the characterizing feature of claim 7, it is possible to increase the deformation pressure required for the bending of the corresponding web by applying it to the pressure web in a lever-like manner. In addition, the direction of application of the deformation pressure required for the bending can be changed when carrying out the method. This is advantageous if one takes into account that, as a rule, in the composite profile to be produced, the space between the two metal profiles to be connected to one another is bridged by not only one but two plastic profiles running parallel to one another, that the bending webs are in each case on the outsides of the two plastic profiles and that they are

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are most bendable by means of deformation tools which are effective from the outside between the two metal profiles.

The further invention deals with the end product of the process, the composite profile. The characterizing feature of claim 8 makes it possible to additionally support the bent web in the direction of its contact area on the plastic profile on the part of the metal profile body, as a result of which, for example, a lability that may result from a transition web of reduced wall thickness could be compensated for again. The characteristic feature of claim 9 can result in the additional support effect in the bending end position already explained in connection with the teaching of claim 8 when using a metal profile with the characteristic feature of claim 3.

Due to the characterizing feature of claim 10, it is possible not to clamp the plastic profile like jaws between opposing webs on the end face, which would require high deformation pressures. Rather, there is a deflection of one leg of lower back pressures because the plastic profile can bend easily between the two webs during the bend, thereby eliminating the need for further material displacement that can only be managed with higher deformation pressure. A locking of the bent web can be ensured in a particularly advantageous manner by the characterizing feature of claim 11. Plastic material would have to be displaced to a considerable extent for the bent web to bend back out of the bending end position, for which the restoring forces acting on the insulating profile rail and acting in the release direction of the connection are not sufficient. When one of the webs is bent, it snaps to a certain extent beyond the counter web into a bending end position locked by an additional form fit. If this is the dead center position described at the outset, this represents a further safeguard. A particularly advantageous variant is possible in this connection by the characterizing feature of claim 12.

The object of the invention is explained in more detail with reference to exemplary embodiments shown in the figures. Show it:

1 shows a cross section through the insulating profile rail before the clamping connection is made,

2 shows a side view corresponding to arrow II in FIG. 1, FIG. 3 shows a sectional view analogous to FIG. 1 through a clamp connection of a finished composite profile,

4 shows a sectional view analogous to FIG. 1 of a modified embodiment,

5 is a side view corresponding to arrow V in Fig. 4,

6 is a side view of the clamp connection of the finished composite profile analogous to FIG. 4,

7 is a sectional view analogous to FIGS. 1 and 4 of a further modified embodiment with the bending leg of the metal profile not yet bent,

8 is a sectional view of the embodiment according to FIG. 7 through the finished composite profile,

9 shows a cross section through a composite profile designed according to the invention with a metal profile which has not yet been deformed,

10 is a sectional view analogous to FIG. 9 through the composite profile at the end of the manufacturing process,

11 is a sectional view analogous to FIG. 9 with an embodiment of webs to be bent modified in analogy to FIGS. 4-6, in the initial bending position,

Fig. 12 is a sectional view analogous to Fig. 11 through the composite profile at the end of the manufacturing process. The metal profile 1 is on the outside with two in

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Provide webs 2, 3 extending perpendicular to the plane of the profile in the longitudinal direction of the profile. In the following, the web 2 is referred to as the bending web and the web 3 as the counter web. The webs 2, 3 protrude from the metal profile 1 on the same side. Between the webs 2, 3 there is a band-shaped plastic profile 4. The plastic profile 4 is clamped between the webs 2, 3 by plastic bending of the bending web 2 in the bending direction 5 on a bending arc 6 around the likewise in the longitudinal direction of the profile, i.e. to the bending axis 7 running perpendicular to the image plane, which in the area of the transition of the bending web 2 into the metal profile 1, i.e. lies in the area of the fixed end 14 of the bending web 2.

In the initial bending position, the bending web 2 is at an angle 8 of approximately or less than 45 ° to the clamping surface 9 of the plastic profile 4. In the bending end position, the free end 10 of the bending web 2 takes the dead center position approximated to the plastic profile 4, in the illustration in FIG. 3, 6 and 8 the bottom dead center position on the bending arc 6.

In the embodiment according to FIGS. 4-6 there is between the bending web 2 and the actual metal profile body

11 a transition web 12, the wall thickness 13 of which is at least partially smaller than that of the bending web 2. In the bending end position (FIGS. 3, 6 and 8), the turning web 2 bears with its fixed end 14 against the metal profile body 11. 4-6 is the transition web

12 is formed by a notch 15 or incision made laterally in the region of the fixed end 14 from the side facing the metal profile body 11 and extending in the longitudinal direction of the web. In the bending end position, the side walls 16, 17 of the notch 15 or the incision lie against one another, as a result of which, in the bending end position, the bending web 2 is supported against displacement pressures effective in the direction of the arrow 18.

The front edge 19 of the free end 10 of the bending web 2 in the bending direction 5 is broken, in particular beveled. The bevel expediently extends over the entire width of the free end 10 of the bending web 2 such that the rear edge 20 of the free end 10 of the bending web 2 forms an acute-angled cutting edge. The rear edge 20 is advantageously serrated in the longitudinal direction of the web. (Teeth 31).

In the embodiment according to FIGS. 4-6, a pressure web 21 is formed on the fixed end 14 of the bending web 2 approximately at right angles to this and io projecting from the metal profile body 11 and protrudes into the parting line 22 between two metal profiles 1 to be connected by a plastic profile 4 .

In the bending end position, the contact area 24 of the bending web 2 on the plastic profile 4 is offset relative to the contact area 25 of the object 3 in a plane perpendicular to the longitudinal direction of the profile (offset 23). The offset 23 is selected such that in the bending end position the contact area 25 of the counter web 3 lies on the side of the contact area 24 of the turning web 2 facing away from the bending direction 5. The two contact areas 24, 25 of the webs 2, 3 lie adjacent to one another in the bending end position in the direction facing away from the metal profile body 11.

In the embodiment according to FIGS. 9 and 10, the bending web 2 of the two metal profiles 1 is bent by means of tools 27, 28 which engage in the parting line 22 from the outside of the plastic profiles 4 and act in the bridging direction 26 between the metal profiles 1. can be formed by a pressure angle or by a roller. In the embodiment according to FIGS. 11 and 12, which works with pressure webs 21 according to FIGS. 4-6, pressure rollers 29 which act against one another and can be rotated about axes 30 extending in the bridging direction 26 can be used as deformation tools.

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4 sheets of drawings