EP3878569A1 - Method for producing a roller profiled component - Google Patents

Abstract

The present invention relates to a method for producing a roll-profiled component, wherein a metal strip to be formed is at least partially embossed in sections between a punch and a die before or after the roll-profiling and is shifted between embossing steps in a feed direction parallel to the longitudinal direction of the metal strip, with one per embossing step Embossing section is embossed. According to the invention, it is provided that the metal strip has at least a first area and a second area continuously in the longitudinal direction, the first area being embossed from a first level of the metal strip, which corresponds to an initial level of the metal strip, to a second level by in the first area of the Metal band, a transition section is formed in each embossing step, which leads in the feed direction without jumps and seamlessly from the first level to the second level, the transition section formed being completely embossed to the second level in a subsequent embossing step.

Description

The present invention relates to a method for producing a roll-profiled component according to the preamble of independent claim 1.

In a generic method for producing a roll-profiled component, a metal strip to be formed is at least partially embossed in sections between a punch and a die before or after the roll profiling and shifted between embossing steps in a feed direction parallel to the longitudinal direction of the metal strip, one embossing section being embossed per embossing step.

Such a method according to the preamble of independent claim 1 is for example from DE 10 2004 055 003 A1 known. In this case, beads and dies are stamped into the edge areas of a sheet metal using a punch and die before roll profiling. The advance of the metal strip is clocked.

It is the object of the present invention to provide a method for producing a roll-profiled component that enables complex shaping by embossing before or after rolling profiling, and by means of which the metal strip can be brought to different continuous levels in the embossing process. The method is also intended to ensure tight manufacturing tolerances.

The object is achieved by the features of independent claim 1. Accordingly, in a method according to the preamble of independent claim 1, there is an inventive solution to the object when the metal strip continuously has at least a first area and a second area in the longitudinal direction, the first area being from a first level of the metal strip, which is an initial level of the Metal strip corresponds, is embossed to a second level by forming a transition section in the first area of the metal strip in each embossing step, which leads in the feed direction without jumps and seamlessly from the first level to the second level, the transition section formed being completely on the in a subsequent embossing step second level is shaped.

The solution according to the invention offers the advantage that in the embossing process a step that is continuous in the longitudinal direction can be embossed between different levels, with a high degree of dimensional accuracy being achieved both in the longitudinal direction and in the transverse direction. By Embossing on a uniform level can be followed by roll profiling, optionally both in the first area and in the second area of the metal strip.

Advantageous embodiments of the present invention are the subject of the subclaims.

The metal strip is preferably made of steel.

In a preferred embodiment of the present invention it is provided that the transition section is embossed in a defined shape by the punch and die. The defined reshaping of the transition section results in a high degree of dimensional accuracy of the embossed area, which is essential for the subsequent roll profiling and potential further processing steps.

The defined shape of the transition section preferably does not exceed a maximum angle of inclination in the longitudinal direction of the metal strip of 20 °, preferably of 15 °. This embodiment also contributes to a high degree of dimensional accuracy both of the transition section and of the finished, embossed metal strip. Furthermore, this prevents material weakening or undesired structural changes.

More preferably, the defined shape of the transition section does not exceed a mean angle of inclination in the longitudinal direction of the metal strip of 10 °. This embodiment also contributes to a high degree of dimensional accuracy and prevents undesired structural changes.

In a preferred embodiment of the present invention it is provided that the embossing section contains a holding section adjoining the transition section counter to the feed direction, the punch and the die having planes running parallel to the metal strip which grip the metal strip in each embossing step in the holding section. As a result, the dimensional accuracy can be further improved decisively.

According to a further preferred embodiment of the present invention, successive embossing sections overlap in such a way that the punch and die positively grip a finished embossed section of the metal strip adjoining the transition section formed in the previous embossing step in the feed direction. This further improves the dimensional accuracy, in particular in the longitudinal direction.

In a preferred embodiment of the present invention it is provided that local embossings are embossed in the second area according to a pattern that is repeated in the longitudinal direction. As a result, a large number of different embossings can be made possible in the second area without reducing the dimensional accuracy in the first area.

The local embossings also preferably form indentations which adjoin the first area and are open towards the first area. In a preferred embodiment it is provided that a basic level of the indentations is the same as the second level and the basic level is directly connected to the first area. The resulting indentations in the transverse direction cannot be produced with a roll profiling process.

According to a further preferred embodiment of the present invention, regions of the metal strip lying on the second level are at least partially removed by punching after the embossing and roll profiling. This enables a complex shape.

More preferably, the areas of the metal strip on the second level along a line which is at a distance of between 0 and 30 mm from a level deviating from the second level and which runs through the first area and second area are removed by punching after the embossing and roll profiling. This enables a curved edge to be created on an embossed step. This would not be possible with a pure roll profiling process.

In a preferred embodiment of the present invention it is provided that the metal strip has a third area which is continuous in the longitudinal direction and which is reshaped by means of roll profiling before or after the embossing, the second area being between the third area and the first area and the first area and third area being the outer edges of the metal band included. This allows extensive roll profiling of both the first and the third area without influencing any embossing that may be present in the second area.

Further preferably, the first area and / or the third area is used to guide the metal strip during roll profiling, in that a roller pair of a rolling mill serving for roll profiling grips the metal strip in the first area and / or third area.

An exemplary embodiment of the present invention is explained in more detail below with reference to drawings.

Figur 1 a, b

Detailansichten des Metallbands, des Stempels und der Matrize vor und nach der Prägung von schräg oben,

Figur 2

Draufsicht auf einen Abschnitt des Metallbands nach der Prägung,

Figur 3

Schnitt des Metallbands im Übergangsabschnitt in Längsrichtung,

Figur 4

Schematische Fertigungslinie des Bauteils, und

Figur 5

Ausführungsbeispiel eines fertigen Bauteils.

Show it:

Figure 1 a, b

Detailed views of the metal strip, the punch and the die before and after the embossing from diagonally above,

Figure 2

Top view of a section of the metal strip after the embossing,

Figure 3

Section of the metal strip in the transitional section in the longitudinal direction,

Figure 4

Schematic production line of the component, and

Figure 5

Embodiment of a finished component.

For the following explanations, the same parts are denoted by the same reference symbols. If a figure contains reference symbols that are not discussed in greater detail in the associated description of the figures, reference is made to the preceding or subsequent figure descriptions.

the Figures 1a and 1b each show a detailed view of the metal strip 1, the punch 2 and the die 3 obliquely from above, wherein Fig. 1a shows the metal strip 1 in front of an embossing with punch 2 and die 3 and Figure 1b shows the metal strip 1 after embossing with punch 2 and die 3.

Fig. 1a shows the metal strip 1 shortly before the punch 2 is closed in a punch movement direction 4 and the metal strip 1 is thereby embossed. In Figure 1b the metal strip 1 is shown after the embossing step, wherein the punch has already been opened in the punch movement direction 4. In the exemplary embodiment shown, the metal strip 1 is embossed on a first level 5 and a second level 6, the first level 5 being the starting level of the metal strip 1, and with beads 7 in addition in the area located on the first level 5 the metal band 1 are embossed. Between individual embossing steps, the metal strip 1 is shifted in a feed direction 8 which runs parallel to the longitudinal direction of the metal strip 1. The feed between two embossing steps is chosen so that the metal strip 1 from the in Figure 1b position shown in Fig. 1a position shown is moved. Correspondingly, successive embossing sections 9, which designate the sections of the metal strip 1 which come to lie between the punch 2 and the die 3 during an embossing step, overlap. A region of the metal strip 1 is not embossed between the punch 2 and the die 3. In the embodiment described, this is deformed by means of roll profiling after the embossing process.

For a more detailed explanation of the embossed sections 9 shows Fig. 2 a plan view of a finished embossed embossing section 9 and the unembossed area of the metal strip 12. In Fig. 2 it is also shown how the metal strip 1 is divided into different areas and sections for realizing the desired embossing. The metal strip 1 is divided into three areas that are continuous in the longitudinal direction, a first area 10 being continuously embossed on the second level 6 and a second area 11 being embossed on partially different levels in the longitudinal and transverse directions. A third area 12 does not lie between punch 2 and die 3 during the embossing, is accordingly not part of the embossing section 9 and in this exemplary embodiment is reshaped by means of roll profiling following the embossing process. The first area 10 and the third area 12 form the outer areas of the metal strip 1 and contain the outer edges. Successive embossing sections 9 are arranged in such a way that certain sections are embossed twice. As a result, the metal strip 1 can be embossed continuously on the second level 6 in the first area 10. In a transition section 13, with each embossing step in the longitudinal direction, a jump-free and seamless transition between the first level 5 and the second level 6 is formed. The transition section 13 is embossed in a defined shape by punch and die, which in Fig. 3 is shown in more detail. The metal strip 1 is only displaced in the feed direction 8 until the next embossing step so that the transition section formed is located within the embossing section 9 that now follows and can be completely embossed on the second level 6 in the next step. Accordingly, a transition section 13 is formed in each embossing step and a transition section 14 formed in the previous embossing step is completely embossed onto the second level 6.

In the embossing section 9, opposite to the feed direction 8, there is a holding section 15, adjacent to the transition section 13 to form the transition section 13 can be carried out with high dimensional accuracy.

In the feed direction 8, adjacent to the transition section 14 formed in the previous embossing step, there is an overlap section 16, which was completely embossed on the second level 6 in the preceding embossing step and grip the punch 2 and die 3 in a form-fitting manner and thus fix the metal strip 1. This guarantees a corrugation-free embossing of the transition section 14 formed on the second level 6. In this case, it is advantageous, as shown in this exemplary embodiment, even if that at the overlapping section 16 adjacent area of the second area 11 of the metal strip 1 was completely embossed in the previous embossing step and the punch 2 and die 3 also grip the metal strip 1 in a form-fitting manner in this area.

In the second area 11 indentations with a basic level on the second level 6 are embossed, which are open towards the first area 10. These embossings are made in the part of the section of the second area 11 which lies between the section of the second area 11 adjoining the transition section 13 to be formed in the transverse direction and the section of the second area 11 adjoining the transition section 14 in the transverse direction, and only once is coined. As a result, it is not necessary for the punch 2 and the die 3 to again engage in the precisely shaped indentations, and the tolerance of the feed is somewhat greater. For the same reason, the beads 7 are embossed in the section of the second region 11 adjoining the transition section 14 formed.

the Fig. 3 shows a section of the metal strip 1 in the transition section 13 in the longitudinal direction after the defined shape of the transition section 13 has been formed. The shaping of this area is particularly important for the dimensional accuracy of the finished embossed first area 10 of the metal strip 1 and for a low material load during the embossing. To ensure this, the tangent slope in the transition section 13 in the longitudinal direction of the metal strip 1 is constant and the tangent of the maximum slope in the longitudinal direction has at most an angle 17 of 15 ° to the second level 6. Furthermore, the mean slope angle in the longitudinal direction does not exceed the value of 10 °.

Fig. 4 shows a schematic representation of the entire manufacturing process. The metal strip 1 is unwound from a reel 18 and smoothed by rolling. The embossing 19 according to the invention then takes place between the punch 2 and the die 3. The embossed metal strip is then roll-profiled 20 in several steps, the profiling taking place in the third area 12 in this exemplary embodiment. The metal strip 1 is guided in the first area 10 by successive pairs of rollers of the rolling mill in such a way that the roll profiling of the third area 12 can be carried out without deforming the embossings in the second area 11. Subsequently, a part of the metal strip on the second level 5 is removed in a punch 21, so that a curved, arched edge is created. In the last step, the component is cut to length by a second punch 22.

Fig. 5 shows a finished component 23 according to the exemplary embodiment described here.

List of reference symbols

1

Metal band

2

rubber stamp

3rd

die

4th

Direction of punch movement

5

First level

6th

Second level

7th

Beads

8th

Feed direction

9

Embossing section

10

First area

11

Second area

12th

Third area

13th

Transition section

14th

Finished embossed transition section

15th

Holding section

16

Overlap section

17th

Extension in the longitudinal direction of the transition section

18th

Maximum angle of incline

19th

Kitchen sink

20th

Roll profiling

21

Punching edge

22nd

Punching to length

Claims (14)

A method for producing a roll profiled member, wherein a reshaped metal strip before or after the roll-profiling is at least partially embossed between a punch and a die sections, and is shifted between the embossing steps in a feed direction parallel to the longitudinal direction of the metal strip, wherein a stamping section is embossed per embossing step, characterized characterized in that the metal strip has at least a first area and a second area continuously in the longitudinal direction, the first area being embossed from a first level of the metal strip, which corresponds to an initial level of the metal strip, to a second level by in the first area of the metal strip in In each embossing step, a transition section is formed which leads in the feed direction without jumps and seamlessly from the first level to the second level, the transition section formed being completely embossed onto the second level in a subsequent embossing step will. Method according to Claim 1, characterized in that the transition section is embossed in a defined shape by means of a punch and die. Method according to Claim 2, characterized in that the defined shape of the transition section does not exceed a maximum angle of inclination in the longitudinal direction of the metal strip of 20 °, preferably of 15 °. Method according to one of Claims 2 to 3, characterized in that the defined shape of the transition section does not exceed a mean angle of inclination in the longitudinal direction of the metal strip of 10 °. Method according to one of Claims 2 to 4, characterized in that the embossing section contains a holding section adjoining the transition section counter to the feed direction, the punch and the die having planes running parallel to the metal strip which grip the metal strip in each embossing step in the holding section. Method according to one of Claims 1 to 5, characterized in that successive embossing sections are superimposed in such a way that the punch and die positively grip a finished embossed section of the metal strip adjoining the transition section formed in the preceding embossing step in the feed direction. Method according to one of Claims 1 to 6, characterized in that local embossings are embossed in the second area according to a pattern that is repeated in the longitudinal direction. Method according to Claim 7, characterized in that the local embossments form indentations which adjoin the first area and are open towards the first area. Method according to Claim 8, characterized in that a basic level of the indentations is equal to the second level and the basic level is directly connected to the first area. Method according to Claim 9, characterized in that the areas of the metal strip on the second level are at least partially removed by punching after the embossing and roll profiling. Method according to claim 10, characterized in that the areas of the metal strip on the second level along a line which has a distance between 0 and 30 mm to a level deviating from the second level and runs through the first area and second area, after the embossing and roll profiling can be removed by punching. Method according to one of Claims 1 to 11, characterized in that the metal strip has a third area which is continuous in the longitudinal direction and which is reshaped by means of roll profiling before or after the embossing, the second area being between the third area and the first area and the first area and the third Area contain the outer edges of the metal band. Method according to claim 12, characterized in that the first area and / or the third area is used to guide the metal strip during roll profiling by a pair of rollers of a rolling mill serving for roll profiling grasping the metal strip at the first area and / or third area. Method according to one of Claims 1 to 13, characterized in that roll profiling takes place after the metal strip has been embossed.

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