DE102014104222A1 - Z-roll profile with varying height and method of manufacture - Google Patents

Abstract

The present invention relates to a rolled section produced from a rolled-strip material using roll profiling, the rolled section having a "Z" cross-sectional shape along its longitudinal axis, and characterized in that the rolled section has a varying height along its longitudinal axis. In addition, the present invention comprises a method for producing the rolled profile from the rolled profile strip material with a roll forming device.

Description

The present invention relates to a rolling profile in the form of a Z with a varying height along a longitudinal axis of the rolled section and a production method by means of roll forming or Rollformprofilieren thereto.

Well known are rolled sections, which are used as components for a body or for a stiffening of bodies in vehicle or aircraft. These are elongated rolled profiles, or simply called profiles, which have been produced from a rolled strip material by roll forming or roll profiling. To produce the corresponding rolled profile, a rolled profile strip material is provided in strip form and usually formed in a roll forming device by a plurality of roll forming units, which preferably each comprise a pair of rolls, to form a continuous profile cross-sectional shape.

From the publication DE10011755A1 is a rolled section with in its longitudinal course changing rolling profile cross-section, in particular a U-shaped rolled section cross-section known. Such a rolled section is produced in a roll forming device with adjustable roll forming units. The rolled section has a base and opposite webs, wherein starting from a component base width whose rolled profile cross-section has at least one widening and at least one taper. Such rolled profiles prove to be insufficient for some complex vehicle structures. In addition, such profiles are relatively heavy in terms of weight and not always good to see in the assembled state.

From the publication EP1527983B1 is another roll profile with a longitudinally varying width in a U-shaped roll section known cross-section, which additionally has flanges. Such a rolled profile has better stability than the rolled profile according to DE10011755A1 , The profile according to the document EP1527983B1 is also relatively heavy in terms of weight and not always good to see in the assembled state.

However, the industry is still trying to create components that allow the lowest possible weight and the best possible processing and integration of such components with a desired stiffness and strength.

Therefore, an object of the invention to overcome the disadvantages of the prior art, in the provision of a rolled section, which is particularly well suited for vehicle and aircraft construction and weighs as little as possible with a desired stiffness and strength and as possible connect well with other components of a vehicle body and can be integrated into it.

The above object is achieved by a rolled section and a method for producing the rolled section according to the features of independent claims 1 and 7. Further advantageous embodiments of the invention are specified in the dependent claims.

According to the invention, there is provided a rolled section made of a rolled strip material using roll profiling, the rolled section having along its longitudinal axis a cross-sectional shape of a "Z" and a varying height. The cross-sectional shape of the "Z" is achieved by having the roll profile along the longitudinal axis in the middle of a web having a first and a second end, wherein the first end of the web in a first flange and the second end of the web merges into a second flange ,

In comparison with another rolled profile having a cross-sectional shape of "U", the rolled section of the present invention is easier at the same rigidity.

The roll profile or Z-roll profile according to the invention with varying height can also be connected on both sides directly to the respective side or surface of the web with adjacent components. For U-shaped rolled profiles attachment to accessibility is well possible only from an outer side of the respective web and not from both sides.

Cable bushings and other bushings must be performed once and thus always twice for U-shaped rolled profiles for each bridge, which is not necessary in the Z-shaped rolled section.

In the rolled section according to the invention, water or condensation can not accumulate to the same extent as in the case of a U-shaped rolled section, which can be stored well in the U-rolled profile.

Cables and pipes and the like are much easier to insert through a corresponding hole in the web without being unidirectional through two spaced apart holes, as is the case with the U-roll profile.

The rolled profile according to the invention has compared to the U-roll profile on a much narrower mounting surface, which is preferably the respective flange, and can thereby better accommodate curved surfaces. This fits that Rolled profile according to the invention, for example better a round wall to which it is to be mounted or attached. For example, the wall is that of an aircraft fuselage, which is known to have a domed inner shape. Preferably, the flange, which is connected to the wall, also have a slightly curved shape, which is also easy to produce by roll forming. Especially with a U-roll profile with a variable width, such a curvature is very difficult to produce, in view of the fact that the resulting curvature of the wall should also be adapted in width.

Preferred embodiments according to the present invention are illustrated in the following drawings and detailed description, but are not intended to limit the present invention thereto.

Show it

1 on the left a first, in the middle a second and on the right a third preferred embodiment of a rolled section, which is shown as a respective sectional image at a position along its longitudinal axis. In this case, the rolled section has a web, a first and a second flange and, depending on the embodiment, none, one or two additional envelopes;

2 the first embodiment of the rolled section in a plan view, a side view and as a respective sectional image at a respective location along the longitudinal axis;

3 the rolled section of the third embodiment in a perspective view;

4 the rolled section of the third embodiment as a sectional view along the longitudinal axis, wherein various processing stages are shown during roll forming;

5 the rolled section of a preferred embodiment with a variable flange width of the second flange;

6 the rolled section of a preferred embodiment with a variable turnover height of the envelope on the second flange;

7 the roll profile of a preferred embodiment having a variable height, wherein the web is curved along the longitudinal axis to the first and the second flange;

8th a preferred roll forming device with a plurality of roll forming units with respective rollers, in a perspective view; and

9 in a perspective view, a plurality of respective rollers of the respective roll forming units, which form a rolled strip material therebetween in stages.

Detailed description of an embodiment

In 1 left in the picture, a first preferred embodiment of a rolled section is shown, which has along its longitudinal axis a cross-sectional shape in the form of a "Z". In this case, a rolled profile strip material along its longitudinal axis using roll profiling to a Z-roll profile is bent so by a first end of the rolled strip material is bent in a first direction to a first flange 2 and a second end of the rolled strip material facing the first end is bent in the same first direction about a second flange 3 to create. In this case, the bending, or also called roll forming or roll forming, takes place substantially perpendicular to the longitudinal axis of the rolled section or of the rolled profile strip material. This creates a so-called Z-rolled profile. In all embodiments, it does not matter whether the Z-roll profile is mirrored axially. For the sake of clarity, it should be noted that the Z-roll profile here is synonymous with rolled or Z-profile.

The first flange 2 points to the jetty 1 a preferred angle of 90 degrees. Other preferred angles between the first flange 2 and the jetty 1 are 60-120 degrees.

The second flange 3 points to the jetty 1 a preferred angle of 90 degrees. Other preferred angles between the second flange 3 and the jetty 1 are 60-120 degrees.

The first is preferred 2 and / or the second flange 3 essentially straight.

The first is preferred 2 and / or the second flange 3 slightly curved in the cross-sectional plane to thereby be adapted to a wall with which the rolled section is to be connected during assembly. This is the first one 2 and / or the second flange 3 preferably curved by up to 5 degrees. Other bends are also possible.

Preferably, the first run 2 and the second flange 3 parallel to each other.

The first flange preferably extends 2 and / or the second flange 3 in the cross-sectional shape straight.

Preferably, the first flange 2 and / or the second flange 3 in the cross-sectional shape so formed to a wall, with which the respective flange 2 . 3 should be connected to be adapted.

To create the Z-roll profile shape, the first run 2 and the second flange 3 essentially opposite to each other.

According to the invention, the rolled section varies along the longitudinal axis at a height of the rolled section. This is in 2 a rolled profile with the first preferred cross-sectional shape at the top in the image in a plan view, in the middle of the image in a side view and shown in the bottom of the image as sectional images. The varying height is thereby through the bridge 1 formed, which varies over the length of the rolled section. In 2 in the lower part of the image, the respective cross sections of the rolled section along the longitudinal axis are shown, which have different heights.

The height of the web is preferred 1 It is higher in the middle along the longitudinal axis in order to better counteract a load along the longitudinal axis of the rolled section, which is higher in the middle. The height of the web is preferred 1 along the longitudinal axis so as to approximate the load at the corresponding location along the longitudinal axis corresponding to. In this way, optimum rigidity can be achieved with minimum material expenditure and with minimal weight of the rolled section. Preferably, the height of the web is adapted to a load of the rolled section, resulting in a corresponding shape or height. As a result, a maximum of weight savings is possible. In the calculation of the stiffness and strength and the height of the rolled section, the first one is also preferred 2 and second flange 3 and the envelopes 4 , if available, taken into account. The load is to be understood as a shear load and / or as a bending load.

In addition, a second embodiment of the first embodiment described above, by an envelope 4 be formed, with the envelope 4 is formed by the first flange 2 at its outer end is bent again in a same bending direction clockwise. Preference is given to the first flange 2 at its outer edge to the envelope 4 bent. Here is the envelope 4 in the direction of the jetty 1 bent and forms with the bridge 1 and the flange 2 a form of a "U". In 1 in the middle part of the picture is the envelope 4 shown with a preferred height and with a preferred bending angle. Other heights and bending angles are also conceivable. It is also conceivable that the envelope varies in height along the longitudinal axis. It is also conceivable that the envelope 4 instead of the first flange 2 to be arranged on the second flange 3 is arranged. The envelope 4 increases the rigidity of the rolled section.

It is also conceivable that as the third embodiment of the first flange 2 and at the second flange 3 one envelope each 4 is arranged. Preference is given to the second flange 3 at its outer edge to a second envelope 4 bent. Here is the second envelope 4 in the direction of the jetty 1 bent and forms with the bridge 1 and the second flange 3 also a form of a "U". The two envelopes increase 4 the rigidity of the rolled section even further. In 3 For this purpose, the rolling profile of the preferred third embodiment is shown in a perspective view.

In particular, the rolled section according to the invention is preferably designed to be suitable for automotive technology, truck technology and / or for aircraft construction.

Preferably, the bending radii between the bridge 1 and the respective first and second flanges 2 . 3 designed to produce the highest possible rigidity, without making the bending edges brittle. The same applies to the other bending edges.

Preference is given to the bridge 1 Openings introduced to pass lines or pipes or other struts or attach to it.

Preferred are in the first 2 and / or in the second flange 3 Openings introduced to pass lines or pipes or other struts or attach to it. Preferably, the first include 2 and / or the second flange 3 Openings to pass through welding electrodes and around the respective flange 2 . 3 to weld well. Preferably additionally or alternatively, the first 2 and / or the second flange 3 also breakthroughs for screw.

In 4 the rolling profile of the preferred third embodiment is shown as a sectional view along the longitudinal axis in various processing stages during roll forming. In this case, 15 bending states are shown by way of example from a flat sheet to the completely formed rolled profile, which arise during processing in a roll forming device. The roll forming apparatus, in turn, allows a variety of rolled sections of varying dimensions to be produced without physically altering the roll forming apparatus, in return for a conventional press.

In 5 is the rolled section of a preferred embodiment with a variable second Flange width of the second flange 3 shown. In this case, the rolled section are shown in top view in the image, in the middle of the image, the rolled section from the side and bottom of the image, the roll profile as three respective sectional images at a respective location along the roll profile. In general, the rolled section may have a variable first flange width of the first flange 2 and / or a variable second flange width of the second flange 3 exhibit.

In 6 the roll profile of a preferred embodiment is shown with a variable second envelope height of the second envelope. The roll profile from the side and bottom of the image are shown at the top of the picture as three respective sectional images at a respective location along the rolled section. Generally, the rolled section may have a variable first turnup height of the first envelope 4 at the first flange 2 and / or a variable second envelope height of the second envelope 4 on the second flange 3 exhibit.

In 7 is the rolled section of a preferred embodiment with a variable height of the web 1 shown, with the bridge 1 both at a first end to the first flange 2 towards, as well as at a second end to the second flange 3 has a curved waveform. The dashed line in the picture is just there to the curvature of the web 1 better to clarify. Generally, the bridge can 1 a curved variable height to the first 2 and to the second flange 3 towards.

In 8th is a preferred rollforming device with a plurality of rollforming units 5 represented with respective rollers in a perspective view, whereby the rolled section can be prepared accordingly.

In 9 are a plurality of respective rollers of the respective roll forming unit, such as the 8th represented, whereby the rolled profile strip material is formed stepwise therebetween.

A production of the rolled section from the rolled strip material is carried out using roll profiling along the longitudinal direction in the roll forming device with a plurality of roll forming units 5 , This forms each Rollformeinheit 5 the rolled profile strip material coming from a roll forming unit 5 on the subsequent rollforming unit 5 is directed to a bit more, such as in 4 shown. The following steps are carried out during production:
a) along the longitudinal direction forming an outer first part of the rolled strip material in a first transverse direction so that the formed first part of the rolled strip material has a first flange 2 forms;
b) along the longitudinal direction, forming an outer second portion of the rolled strip material opposing the first portion in a second transverse direction substantially opposite the first transverse direction such that the formed second portion of the rolled strip material comprises a second flange 3 forms after the plurality of Rollformeinheiten opposite to the first flange 2 is trained;
c) wherein the forming of the outer first and second parts of the rolled strip material is made so that therebetween a web 1 stops as a middle part of the rolled strip material;
d) wherein the forming of the rolled strip material is performed by adjustable roll forming units to the web 1 and thus to form the rolled section of varying height along its longitudinal axis.

• – entlang der Längsrichtung Umformen eines äußeren dritten Teils des Walzprofilbandmaterials, das außen zum Rand des ersten Teils des Walzprofilbandmaterials angeordnet ist, in einer dritten Querrichtung, um einen ersten Umschlag 4 zu bilden, wobei die dritte Querrichtung eine weitere Drehung des Walzprofilbandmaterials in eine gleiche Drehrichtung wie das Umformen des ersten Teils darstellt, um mit dem Steg 1 eine Form eines „U” zu bilden.

The production of the rolled section preferably comprises the following additional steps:

• Along the longitudinal direction, forming an outer third part of the rolled-strip material, which is arranged outside the edge of the first part of the rolled-strip material, in a third transverse direction, around a first turn-up 4 form, wherein the third transverse direction represents a further rotation of the rolled strip material in a same direction of rotation as the forming of the first part, to the web 1 to form a form of a "U".

• – entlang der Längsrichtung Umformen eines äußeren vierten Teils des Walzprofilbandmaterials, das außen zum Rand des zweiten Teils des Walzprofilbandmaterials angeordnet ist, in einer vierten Querrichtung, um einen zweiten Umschlag 4 zu bilden, wobei die vierte Querrichtung eine andere weitere Drehung des Walzprofilbandmaterials in eine andere gleiche Drehrichtung wie das Umformen des zweiten Teils des Walzprofilbandmaterials darstellt, um mit dem Steg 1 eine Form eines anderen „U” zu bilden.

The production of the rolled section preferably comprises the following additional steps:

• Along the longitudinal direction, in a fourth transverse direction, forming an outer fourth part of the rolled-strip material, which is arranged outside to the edge of the second part of the rolled-strip material, around a second envelope 4 with the fourth transverse direction representing another further rotation of the rolled strip material in a different, same direction of rotation as the forming of the second part of the rolled strip material to engage with the web 1 to form a form of another "U".

Preferably, according to the invention, a cutting device, not shown, is provided, which cuts the flat sheet metal before the roll forming operation according to its variable height.

Further possible embodiments are described in the following claims.

In particular, the various features of the above-described Embodiments are combined with each other, as far as they are not technically exclusive.

The reference numerals mentioned in the claims are for better understanding, but do not limit the claims to the shapes shown in the figures.

LIST OF REFERENCE NUMBERS

1

web

2

first flange

3

second flange

4

envelope

5

Roll forming unit

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10011755 A1 [0003, 0004]
• EP 1527983 B1 [0004, 0004]

Claims (15)

Rolled profile produced from a rolled-strip material using roll profiling, the rolled section having a cross-sectional shape of a "Z" along its longitudinal axis, in which the rolled section has a web along the longitudinal axis ( 1 ) having a first and a second end, wherein the first end of the web ( 1 ) in a first flange ( 2 ) transitions in a first transverse direction from the first end of the web ( 1 ) is bent, wherein the second end of the web ( 1 ) in a second flange ( 3 ) passing from the pier ( 1 ) is bent at the second end in a second transverse direction, characterized in that the rolled section along its longitudinal axis has a varying height. Rolling profile according to claim 1, wherein the varying height of the rolled section is determined by a varying height of the web (FIG. 1 ) on at least one longitudinal side of the web ( 1 ) is formed. Rolled profile according to claim 1 or 2, wherein the varying height of the rolled section is adapted to a load of the rolled section and / or a nature of the rolled section such as size and arrangement of the apertures in the rolled section. Rolling profile according to one or more of the preceding claims, wherein the height of the rolled section in the middle is higher than at the respective ends of the rolled section. Roll profile according to one or more of the preceding claims, wherein the first flange ( 2 ) at its outer edge to an envelope ( 4 ) is bent, the envelope ( 4 ) is bent in the direction of the web and with the web ( 4 ) forms a shape of a "U". Roll profile according to one or more of the preceding claims, wherein the second flange ( 3 ) at its outer edge to an envelope ( 4 ) is bent, the envelope ( 4 ) is bent in the direction of the web and with the web ( 4 ) forms a shape of a "U". Rolled profile according to one or more of the preceding claims, wherein the first ( 2 ) and / or the second flange ( 3 ) have a variable width. Rolled profile according to claim 6 or 7, wherein the envelopes ( 4 ) each have a variable amount. Rolling profile according to one or more of the preceding claims, wherein the rolled section is designed to be suitable for the automotive industry, the trucking technique or for aircraft construction. Rolling profile according to one or more of the preceding claims, wherein the first transverse direction and the second transverse direction and thus the first flange ( 2 ) and the second flange ( 3 ) in an opposite direction; and / or wherein the first flange ( 2 ) and the second flange ( 3 ) parallel to each other; and / or wherein the first flange ( 2 ) and / or the second flange ( 3 ) are straight in cross-sectional shape; and / or wherein the first flange ( 2 ) and / or the second flange ( 3 ) are formed in the cross-sectional shape, a wall, with which the respective flange ( 2 . 3 ) to be adapted. Process for producing a rolled section according to one or more of the preceding claims. A method of making a rolled profile from a rolled strip material using roll profiling along a longitudinal direction in a roll forming apparatus having a plurality of roll forming units which additionally bend the roll profile strip material by one angular unit relative to a respective preceding roll forming unit, comprising the steps of: a) along the longitudinal direction Forming an outer first part of the rolled-strip material in a first transverse direction so that the formed first part of the rolled-strip material has a first flange (FIG. 2 ) forms; b) along the longitudinal direction, forming an outer second part of the rolled strip material opposite the first part in a second transverse direction that is substantially opposite the first transverse direction so that the formed second part of the rolled strip material has a second flange (FIG. 3 ) which, after the plurality of roll forming units, is opposite to the first flange (FIG. 2 ) is trained; c) wherein the forming of the outer first and second parts of the roll-formed strip material is carried out so that between a web ( 1 ) stops as a middle part of the rolled strip material; characterized in that d) the forming of the rolled strip material is performed by adjustable roll forming units, and in that the web ( 1 ) and thus the roll profile has a varying height along its longitudinal axis. A method according to claim 12, comprising the additional steps of: - longitudinally forming an outer third part of the rolled strip material, which is arranged outside to the edge of the first part of the rolled strip material, in a third transverse direction to form a first envelope ( 4 ) to build, wherein the third transverse direction represents a further rotation of the rolled profile strip material in a same direction of rotation as the deformation of the first part in order to engage with the web (10). 1 ) to form a shape of a "U". A method according to claim 12 or 13, comprising the additional steps of: - longitudinally forming an outer fourth part of the rolled strip material, which is arranged outside to the edge of the second part of the rolled strip material, in a fourth transverse direction, around a second envelope ( 4 ), wherein the fourth transverse direction represents another further rotation of the rolled profile strip material in a different, same direction of rotation as the forming of the second part of the rolled profile strip material in order to engage with the web (FIG. 1 ) to form a form of another "U". A method according to any one of claims 12 to 14, further comprising the step of cutting the rolled profile strip material according to its varying height prior to roll profiling.

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