EP2313216A1

EP2313216A1 - Method for the production of a cold-rolled profile having at least one thickened profile edge

Info

Publication number: EP2313216A1
Application number: EP09777439A
Authority: EP
Inventors: Thomas Welser; Kurt Aigner; Harald Schachinger
Original assignee: WELSER PROFILE AUSTRIA GmbH
Current assignee: WELSER PROFILE AUSTRIA GmbH
Priority date: 2008-07-24
Filing date: 2009-07-24
Publication date: 2011-04-27
Anticipated expiration: 2029-07-24
Also published as: DK2313216T3; WO2010009751A1; WO2010009898A8; US20110197646A1; WO2010009898A1; PL2313216T3; ATE538883T1; US8959975B2; ES2377825T3; EP2313216B1

Abstract

A method for the production of a cold-rolled profile having at least one thickened profile edge made of a metal strip is provided. For this purpose the metal strip is guided through at least one clamping nip formed by at least one guide roll and at least one lateral edging roll, wherein the roll axis of the guide roll is disposed parallel to the web level of the metal strip, while the roll axis of the edging roll is disposed transverse to the roll axis of the guide roll, and is lined up at an angle to the strip level such that in addition to the upsetting force exerted by the edging roll onto the strip edge a clamping force is also applied that acts on the side of the metal strip facing away from the guide roll. The edging roll may be configured in steps, and surrounds the web edge at least on the side of the metal strip facing away from the guide roll.

Description

METHOD FOR PRODUCING A COLD-ROLLED PROFILE WITH AT LEAST ONE THICK-THICK PROFILE EDGE

The invention relates to a method for producing a cold-rolled profile with at least one thickened profile edge of a metal strip.

Rolled profiles are known in various embodiments and in a variety of manufacturing processes. Corresponding profiles are created starting from a substantially rectangular, elongate, flat metal band usually by bending or rolling the metal strip or strip. Here, "bending or rolling" includes all operations that can be used to make the metal band blank into the desired shape, e.g. also bending, edging, embossing etc. The shape of the flat flat metal strip can essentially be done without changing the material thickness or include methods in which a profile is made of a metal strip whose cross-sectional area has no constant thickness, but aware areas larger and smaller Material thickness has.

One possible profile, exemplified here, is e.g. a C-shaped mounting rail, as well as an anchor rail, which is usually produced by hot rolling or cold profiling. Hot rolled profiles are rolled out of a steel block, whereby the heated steel block passes through about 8 different rolls, each of which has several so-called stitches, which are passed through with different times. As part of the hot rolling, it is also possible without problems to carry out the formation of the profile preform together with a thickness reduction, wherein the rolling to reduce the thickness leads to a lateral flow of the displaced material. For material-intensive profiles, such as C-profiles, the share of material costs is over 70%, so saving on the material drastically reduces the overall cost.

In contrast, cold-formed rails of steel strip are produced on rolls in a single operation, wherein no reduction in thickness takes place, because due to the friction across the roll and the stiffness of the flat rolled material, the thickness reduction is converted only in an extension in the longitudinal direction or rolling direction and a material consolidation ,

A method for changing the thickness of a metal strip is known for example from DE 197 43 093. In this case, a metal strip is produced with molded-in thinner strips, in which the strip is pulled through a drawing gap, which is inclined from the end face of an inclined strip. Asked work roll and a support roller is formed, which may be formed as a work roll. When pulling through this working gap, a rolling force and at the same time a tensile force is exerted transversely to the pulling direction of the two rolls on the belt, such that the displaced material in the thinned areas flows almost exclusively transverse to the pulling direction.

Another method for producing a metal strip with different thicknesses and in particular with a thicker edge is known from JP 55141330. Here, a light metal strip is first passed through a pair of rollers, wherein a roller is provided with end portions which are beyond the actual roller surface and wherein the second roller has a smaller width than the first roller, and is disposed between the end portions of the first roller. If the light metal is passed through the nip, there is a displacement or flow of the material towards the end regions, which are formed thickened in this way.

Object of the present invention is to provide a method for producing a profile with different wall thicknesses, which is particularly economical to perform, and wherein the corresponding profile produced by particularly low material costs as well as manufacturing costs is.

This object is achieved for a method for producing a cold-rolled profile with at least one thickened profile edge of a metal strip, characterized in that the metal strip is guided by at least one nip formed by a guide roller and at least one lateral compression roller, wherein the roller axis of the guide roller parallel to the Band level of the metal strip is arranged, while the roll axis of the compression roll is arranged transversely to the roll axis of the guide roller and is inclined to the belt plane employed that of the compression roller in addition to the force exerted on the belt edge compression force acting on the side facing away from the guide roller side of the metal strip clamping force is applied, wherein the compression roller is formed step-shaped and surrounds the band edge at least on the side facing away from the guide roller of the metal strip.

In contrast to the previously known methods, therefore, the profile is made of a metal strip, which already has the desired thinnest thickness, and thickened only by compression in the areas where thickening is required. In this way, the profile can be produced more precisely by considerably fewer work steps. be put. Since not the total thickness of the metal strip is changed during the process, the material costs can be kept as low as possible. According to the method of the invention substantially no undesirable stresses are introduced into the material.

Due to the tilted edging rolls, the process is controlled in a simple manner. There is a uniform flow of the metal in the desired direction. At this time, the compression roll holds a surface, i. Upper or lower side of the metal band, so that the metal strip deforms targeted only in one direction, while the other side remains in the original state. Similarly, the step-shaped design of the compression roll ensures a targeted deformation of the metal strip, which is held firmly by the compression roll.

According to a preferred embodiment, the angle between the roller axis of the guide roller and the roller axis of the compression roller may be between 92 to 100 °. Appropriate angles have proven particularly useful in practice and ensure a sufficient compression force and holding force of the compression roll safe.

Another preferred embodiment can provide that the stepped profile of the compression roll is extended to a band edge encompassing the U-profile on both sides, wherein the voltage applied to the side facing away from the guide roller free U-legs is designed to be considerably longer. This embodiment prevents in particular the formation of metal burrs, which otherwise often occur in upsetting processes between the individual rollers. As a result, the post-processing of the metal strip can be reduced to a minimum and the total cost can be kept low.

According to another preferred embodiment, at least one of the edging roller facing end portion of the guide roller may extend convexly at a predetermined angle. By changing the shape of the guide roller, it is possible to achieve, simultaneously with the upsetting, a shaping of the thickened portion corresponding to the convex end portion of the guide roller.

According to yet another preferred embodiment, the upsetting can be carried out in several steps, wherein at least the convex end portion of the guide roller is exchanged for a guide roller after each upsetting step, the at least one end portion of which runs convex at a greater angle than the front roller. forth. Since the change in shape of the metal strip is carried out in slow steps, the desired shape can be achieved particularly precisely without the material to be deformed being exposed to excessive stresses.

Advantageously, the angles of the at least one convex end portion of the guide roller may vary in steps of 1 to 10 °, preferably 2 to 5 °. These angles have proven to be particularly preferred in practice to perform a smooth change in shape.

According to a further preferred embodiment, an additional support roller may be provided, which is arranged opposite the guide roller, so that the metal strip is additionally clamped between the guide roller and the support roller, wherein the support roller is narrower than the guide roller and at least on one side up to the compression roller extends. In this way, an improved guidance of the metal strip is achieved because a central region of the metal strip between the guide roller and the support roller can be maintained. This also simplifies the structure of the compression roller, since the guide roller opposite the stepped portion or free leg must not be designed to be excessively long, e.g. Approximately to the middle of the metal strip, so that the compression rollers can be used flexibly and are cheaper to manufacture.

According to another preferred embodiment, at least one deformation step for reshaping the thickened metal strip may follow the last swaging step. In this way, the formation of a desired profile in a single operation with the thickening of certain areas of the metal strip can be performed.

Preferably, the at least one thickened profile edge can first be angled relative to the non-thickened region of the metal strip. Here, the angle of the thickened profile edge can be performed stepwise until the thickened surface opposite outer surface is angled at an angle of about 90 ° to the non-thickened areas. Since the angle is not abrupt, but slowly in several steps, again as little tension on the material are exercised.

Advantageously, the partially thickened metal strip can be formed into a C-shaped mounting rail. The method according to the invention has proved to be particularly suitable for a corresponding element. The invention will be explained in more detail below with reference to an embodiment. It shows:

Figure 1 shows a metal strip before compression according to the method of the invention in a schematic representation;

Figure 2 a) - c) the metal strip shown in Figure 1 in various stages of compression.

FIG. 3) shows an upsetting step shown in FIG. 2 in a three-dimensional representation;

Figure 4) a detail enlargement of Figure 3;

Figure 5 a) - b) two different deformation steps of the obtained after upsetting partially thickened metal strip;

Figure 6 a) - c) various stages in the forming of the metal strip according to the preceding figures for producing a C-shaped anchor rail in a schematic representation;

Basically, the same parts are provided with the same reference numerals in the figures.

FIGS. 1 and 2 a) to c) schematically show the method for achieving a change in thickness at the strip edges of a metal strip.

1 shows a metal strip 1 introduced into a rolling device with a first roller 2 and an oppositely disposed second roller 3, wherein the metal strip 1 is held and guided between the two rollers. The metal strip 1 in this case has a predetermined thickness, which coincides with the desired final thickness of the essential regions of the metal strip 1.

In Figure 2, various steps for compressing the strip edges of the metal strip 1 are shown in more detail, wherein three individual steps are shown, but the actual process may have a variety of other steps to here a gradual change in the thickness of the strip edges, as well as the formation of a profile achieve.

In contrast to the rolling device shown in Figure 1, the rolling device shown in Figure 2 a) differs in that the roller 2 has been replaced by a guide roller 4 and the roller 3 has been replaced by a support roller 8, which is significantly narrower than the guide roller 3. The width of the roller 8 is in this case selected such that the metal strip 1 extends on both sides beyond the end faces of the support roller 8 addition. The nip formed between the guide roller 4 and the support roller 8, in which the metal strip 1 is guided, in this case has the same height as in Figure 1, so that the thickness of the metal strip in the region of the mutually parallel roller surfaces is not changed, the task of it is rather the two rolls to hold and guide the metal strip during the laterally exerted compression. The roll axes of both rolls 4 and 8 are arranged parallel to the strip plane.

As shown in FIG. 2, the guide roller 4 extends on both sides beyond the support roller 8 and is bevelled in the region of the end sections 6 of the roller surface adjoining the end faces 5, so that the roller surface runs out convexly. The metal strip 1 extends in the region of the guide roller 4 on both sides beyond the end faces 6 of the roller 4 also.

The actual upsetting operation is carried out by compression rollers 9, which are arranged on both sides on the end faces or the band edge 10 of the metal strip 1. In contrast to the guide or support roller, the roller axis of the compression roller 9 is arranged substantially transversely to the roller axis of the guide roller and inclined to the belt plane employed. This results between the roll axis 20 of the compression roll 9 and the roll axis 21 of the guide roller 4, an angle a of more than 90 °, preferably between 92 ° and 100 °.

The compression rollers are formed profiled in the area adjacent to the metal strip 1 to the band edge and at least one adjacent end portion of the metal strip surface, ie the guide roller 4 facing away from the metal strip surface. In the compression roll 9 shown in Figure 2, the compression roll is formed with a U-shaped profile, wherein the band edge is additionally encompassed on each metal strip surface of a respective free U-leg. In this case, however, the U-legs are designed differently long, the free U-leg 22 on the metal band underside, ie on the side facing away from the guide roller 4 is much longer than the opposite U-leg 23, and extends substantially to the The free U-leg 22 also has such dimensions that it extends beyond the convex end portions 6 of the guide roller 4 addition. As a result, the resulting stresses in this area are better distributed to the entire material. At the same time, the formation of burrs is suppressed. The region of the metal strip 1 to be deformed is thus held during the swaging operation between the guide roller 4 and the compression roller 9, and the strip edges 10 of the metal strip are compressed by exerting a force by the compression rollers 9 in the direction of the clamping gap, whereby the material passes through this compression process deformed and penetrates into the formed between the convex end portions 6 of the guide rollers 4 and the free U-legs 22 of the compression rollers 9 nip. Here, the clamping gap formed between the guide roller 4 and the compression roller 9, at least in the region of the convex end portions 6, formed wider than the clamping gap formed between the guide roller 4 and the support roller 8.

The first compression step is completed when the existing in the region of the convex end portions 6 of the guide roller 4 and the compression roller 9 nip is completely filled by the material of the metal strip 1, i. the band edge was deformed by compression.

Subsequently, the guide roller 4 is replaced by a new guide roller 7, which in turn has a smaller width than the now partially thickened metal strip, so that the partially thickened metal strip extends at the two band edges on the end faces 5 of the guide roller 7. In contrast to the first guide roller 4, the convex end portions 6 are more angled in the new guide roller 7, so that despite partially thickened end portion of the metal strip 1, a gap is still present, formed between the surface of the metal strip 1 and the convex end portions 6 of the guide roller 7. On the opposite surface, the metal strip has no change, but continues parallel to the roll surface of the support roller 8 and parallel to the free U-leg 22 of the compression roller 9, which forms a plane with the roll surface of the support roller 8.

The upsetting roll 9 can also be replaced by a new one after each swaging step to accommodate the increasing deformation of the strip, e.g. to adapt the profiling of the compression roll of each new deformation.

By re-exerting pressure on the strip edges by the compression rollers 9, the material of the metal strip 1 is in turn compressed, and so the newly occurring gap is filled by the material deforming in this way. These individual compression steps can each be carried out successively with a new guide roller and new compression roller, with unchanged retention of the support roller 8, until a desired thickening is achieved. Of course, if the metal strip is continuously pushed or pulled in a rolling mill by successive rolls, a new supporting roll 8 is also used in each step, which however may correspond to the preceding one. If the compression roller is to be kept unchanged during the individual step, it would be necessary to change the width of the support roller from step to step in order to take account of the compression,

Preferably, the deformation of the metal strip 1 is carried out in slow increments, the convex end portions 6 each tapering at greater angles, preferably in increments of three degrees, to a desired end bevel, e.g. shown in Figure 2 c).

Since the strip edge is compressed in each case between the convex end regions, a targeted deformation of the metal strip and thus the formation of a profile takes place simultaneously with the thickening.

In the last compression step, the compression roll 9, as shown in Figure 2c, be formed with a step profile, with only a free leg 25 rests against the metal band bottom and the remaining profile is arranged parallel to the end face 5 of the guide roller. This determines the final shape of the thickened area.

In FIGS. 3 and 4, the upsetting process is again illustrated by means of a three-dimensional representation, with FIG. 4 showing a detail enlargement from FIG. Both figures show how a middle region of the metal strip 1 is held between the guide roller 4 and the support roller 8. Both rollers are arranged parallel to each other and the roller axes are parallel to each other and parallel to the belt plane. The end portions of the guide roller are concave, i. they are provided with a chamfer. This area is used in the subsequent compression of the deformation of the metal strip.

The end portions of the metal strip 1, that is, the areas of the metal strip 1 extending beyond the back-up roll 8 are held on the metal band upper side by the guide roller and on the metal band lower side by laterally arranged back-up rollers 9. The back-up rollers are tilted relative to the belt plane, ie they are slightly inclined downwardly away from the guide rollers. By this inclination of the support rollers 9 can Also be transmitted from the support rollers 9 on the underside of the metal strip sufficient force to prevent deformation here.

The support roller is profiled, so that not only an area of the underside of the metal band, but also the band edge and a region of the metal band upper side is enclosed by the support roller. However, in contrast to the leg 22 of the support roller resting against the underside of the metal band, which extends clearly beyond the region to be thickened, the metal band upper side is only guided over part of the thickened region. The area between the two U-legs, as shown in the present example may be rounded to deform the metal strip 1 corresponding to the rounding.

After the metal strip 1 is formed by the desired number of compression steps with a thickened band edge, wherein the thickened region is formed only in the region of a surface of the metal strip 1 at a predetermined angle to the outside uniformly extending end portions, the metal strip thus obtained is in a deformed immediately following the compression deformation processes to the desired final profile.

In this case, an angling of the thickened end sections of the metal strip 1 takes place at first, wherein this angling is not carried out abruptly, but slowly, in a large number of individual deformation steps. In FIGS. 5 a) and 5 b), different steps are shown during the deformation, once, as shown in FIG. 5, after the thickened surface has been bent at an angle of 90 ° to the unmodified surface of the metal strip 1, as well as in FIG 5 b), the finished angled profile, wherein the two thickened end portions extend toward each other, and the unchanged surface of the metal strip 1 is angled at an angle of 90 °.

To obtain the corresponding profile obtained in FIG. To transform into a C-shaped mounting rail, a variety of other deformation processes can be used, the deformation is also here again gradually. Figure 6 a) and 6 b) show here two partially deformed profiles during the deformation process.

The finished deformed profile in the form of a C-rail is finally shown in Figure 6 c). In this case, the finished profile comprises a base region 10 as well as two legs 11 and 12 extending perpendicularly thereto, to which finally the angled profiles Connect the thick area. The angled thickened areas extend toward each other, wherein a gap is formed between the two areas.

Claims

claims

1. A method for producing a cold-rolled profile with at least one thickened profile edge of a metal strip, characterized in that the metal strip is guided by at least one clamping roller formed by a guide roller and at least one lateral compression roller, wherein the roller axis of the guide roller parallel to the belt plane of the metal strip is arranged, while the roll axis of the compression roll is arranged transversely to the roll axis of the guide roller and is inclined to the belt plane employed that from the compression roll in addition to the force exerted on the belt edge compression force acting on the side facing away from the guide roller side of the metal strip clamping force is applied, wherein the compression roller is step-shaped and surrounds the band edge at least on the side facing away from the guide roller of the metal strip.

2. The method according to claim 1, characterized in that the angle between the roller axis of the guide roller and the roller axis of the compression roller is between 92 to 100 °.

3. The method according to claim 1 or 2, characterized in that the stepped profile of the compression roll is extended to a band edge on both sides embracing U-profile, wherein the side facing away from the guide roller side free U-leg is designed to be considerably longer.

4. The method according to any one of claims 1 to 3, characterized in that at least one of the compression roller facing end portion of the guide roller runs convex at a predetermined angle.

5. The method according to claim 4, characterized in that the upsetting is carried out in several steps, wherein at least the guide roller is replaced after each upsetting step against a guide roller whose at least one end portion convex terminates at a larger angle than the preceding one.

6. The method according to claim 5, characterized in that the angle of the at least one convex end portion of the guide roller in steps of 1 to 10 °, preferably from 2 to 5 ° changes.

7. The method according to any one of claims 1 to 6, characterized by a support roller, which is arranged opposite the guide roller, so that the metal strip is additionally clamped between the guide roller and the support roller, wherein the support roller is narrower than the guide roller is formed and at least extends on one side up to the compression roller.

8. The method according to at least one of claims 1 to 7, characterized in that after the last crushing step at least one deformation step for forming the thickened metal strip is performed.

9. The method according to claim 8, characterized in that the at least one thickened profile edge is angled relative to the non-thickened region of the metal strip.

10. The method according to claim 9, characterized in that the Abwinkein the thickened profile edge is performed stepwise until the thickened surface corresponding end portions of the opposite outer surface of the metal strip is angled at an angle of about 90 °, so that the thickened surfaces directly are opposite.

11. The method according to at least one of steps 1 to 10, characterized in that the metal strip is transferred in the non-thickened area formed by at least one Abwinkelverfahren in the desired profile shape.

12. The method according to claim 11, characterized in that the metal strip is formed into a C-shaped mounting rail, wherein the two thickened end portions are arranged to extend toward each other.