EP3184949A2 - Piece of sheet metal with a rib structure comprising gills of a heat transfer device and method of manufacturing - Google Patents

Abstract

The present invention relates to a sheet metal part (2) with a gill (3) having rib structure (1) with the gills (3) forming sectional structure (5) which has at least two sections (10) each having two cuts (6) in a width direction (8) of the sheet metal part (2) are separated by non-cutting smooth regions (11), wherein the cutting structure (5) in the width direction (8) over a sectional structure width (13). In this case, it is essential to the invention that the sectional structure (5) has at least two such section sections (10) adjacent to one another in the width direction (8) and having a different number of such sections (6). The invention further relates to a method for producing such a sheet metal part (2). The invention further relates to a roller (23) of a roller pair (22) for producing such a sheet metal part (2). The invention also relates to a heat exchanger (0) with such a sheet metal part (2).

Description

The present invention relates to a sheet metal part of a fin structure of a heat exchanger having gills, according to the preamble of claim 1. The invention further relates to a method for producing such a sheet metal part by means of a pair of rollers and a roller of such a pair of rollers.

Heat exchangers serve the heat exchange between two fluids and are used in a variety of applications. Such heat exchangers can be used for example in air conditioning systems and in motor vehicles. For heat exchange between the fluids, such a heat exchanger usually has two fluidically separate duct systems which are connected to one another in a heat-transmitting manner. For improving the heat transfer, in particular for enlarging the heat-transferring surface, it is known to use rib structures arranged in one of the channel systems. To increase the heat transfer and / or an advantageous influence on the flow of the corresponding fluid such rib structures are usually provided with gills, which in particular allow a flow through the rib structure.

The EP 1 331 464 A2 as well as the DE 200 10 994 U1 show such rib structures with gills, which are arranged in gill sections, wherein the gill sections are separated by gill-free smooth areas.

Such rib structures are usually made of a sheet metal part, wherein the sheet metal parts provided for the purpose of producing the gills with cuts whose cut edges are then raised to produce the gills. To provide the respective sheet metal part with the cuts or for introducing a cutting structure in the sheet metal part, this is processed with appropriate resources, eg. With a pair of rollers. This results in the sheet metal part symmetrical cutting structures and accordingly symmetrical gill structures. In addition, the outer edges of the sheet metal parts correspond to such smooth areas in order to reduce damage to the sheet metal part and / or reject rates.

Said smooth regions in which no gills are provided in the rib structure, however, represent disadvantages with regard to the flow of the associated fluid and / or the heat exchange, so that they can lead to a lower efficiency of the associated heat exchanger.

In addition, depending on the circumstances of the associated heat exchanger, in particular depending on the dimensions of the associated heat exchanger, the rib structures are to be adapted to these. For this purpose, the use of each individually adapted equipment, in particular the use of each pair of suitable rollers, necessary.

The present invention therefore deals with the problem of providing improved or at least alternative embodiments for a sheet metal part of a gill-containing rib structure and for a method for producing such a sheet metal part and for a roll for producing such a sheet metal part, which in particular by a more variable production of Rib structure and / or increased variability of possible geometries of the rib structures and / or lower manufacturing costs of the rib structure distinguished.

This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.

The present invention is based on the general idea to provide a sheet metal part for producing a gill-comprising rib structure of a heat exchanger with sections of different number of cuts, wherein from the respective cut such a gill is produced. The sheet metal part thus has sections with a different number of gills. This allows a more flexible use of the rib structure. In particular, rib structures of different geometry can be produced from the sheet metal part, which accordingly can be used in different heat exchangers, in particular in heat exchangers of different geometrical conditions. As a result, an increased variety of rib structures made of the same sheet metal part is possible. Thus, the manufacturing cost of the sheet metal parts or the rib structures can be reduced. In addition, the different number of cuts or gills can be used for a reduction or reduction of cut-free areas in the sheet-metal part or gill-free areas in the rib structure, so that the efficiency of the rib structure and, accordingly, of the associated heat exchanger can be increased. According to the concept of the invention, the sheet metal part thus has the cutting structure, which subsequently serves to form the gills. The sectional structure has at least two cutting sections, wherein the respective section comprises at least two sections. The respective cut can serve to produce such a gill, for example by reshaping the cut edges. The gills of each section are doing with an acute angle of sheet metal part, the acute angle is the smaller angle between the gill and the sheet metal part. The cut portions are in a width direction of the sheet metal part separated from each other, wherein cut-free smooth areas are arranged between the cut sections. The width direction is therefore usually transverse to the cuts. The cutting sections extend in the width direction over a sectional structure width. At least two adjacent sections in the width direction have a different number of cuts. Accordingly, at least two widthwise adjacent gill portions have a different number of gills. That is to say, the sheet metal part extends in the width direction of the cutting structure over a width, which is referred to below as the sheet metal part width. In this case, the sectional structure has at least two such section sections, of which at least two have a different number of sections. Accordingly, after producing the gills from the cuts, the sheet metal part has at least two widthwise adjacent gill portions which have a different number of gills.

In preferred embodiments, the sectional structure is formed asymmetrically with respect to the center of the sheet metal part width, which is referred to below as sheet metal part width center. Accordingly, the gill structure is formed asymmetrically with respect to the sheet metal part width center. The asymmetrical design is realized by means of the different number of cuts or gills. This asymmetrical design makes it possible to produce rib structures of different geometry or rib structures matched to different geometries from the sheet metal part or from identically designed sheet metal parts.

The production of the rib structure from the sheet metal part can be done by a corresponding forming of the sheet metal part. This reshaping is advantageously carried out after the sheet metal part has been provided with the cutting structure and / or after the sheet metal part has been provided with the gills.

The sheet metal part can in principle be made of any metal-containing material. Preferably, the sheet metal part is made of a material with good thermal conductivity. In particular, metals or metal-containing alloys are used. To think about aluminum or an aluminum alloy.

It is conceivable that the cut sections have a same, running in the width direction section width section. It is also conceivable that the cut sections each have an equal number of cuts.

It is also conceivable that the cuts in the respective section are arranged equidistantly, in particular in the width direction equidistant. This means that the gills of the cutting section are also arranged equidistant. Also to be considered is variants in which the sections of such a section are arranged at different distances and / or sections of different sections at different distances.

If the cuts of two cut sections are arranged equidistantly, the larger cut section width of one of the cut sections results in a higher number of cuts or gills.

In preferred embodiments, at least two of the cut portions have different widthwise section widths. As a result, rib structures of different geometry can be produced from the sheet metal part. The different sectional section widths can in this case, in particular in equidistantly arranged sections, lead to the cut sections of different section widths have different numbers of cuts.

Embodiments in which section sections of different sectional section width are alternately arranged at least in sections are advantageous. That is, in at least one region, cut portions of different cut portion widths are alternately arranged. This leads in particular to the fact that immediately adjacent cut sections in this section have different cut section widths. As a result, a larger number of rib structures of different geometry can be produced from the sheet metal part.

In preferred embodiments, such a section has a minimum section width. That is, there is at least one other cut portion having a larger cut width. In this case, it is preferable if the section width of at least one other section corresponds to a multiple whole of the minimum section width. As a result, in particular the subsequent processing of the sheet metal part, for example, the manufacture of the gills and / or the forming of the sheet metal part to the rib structure, simplified.

The same can also apply to the distances between the cut sections. That is, there is a minimum widthwise distance between two of the cut portions, the distance between at least two other cut portions corresponding to a multiple whole of the minimum distance.

It is further preferred, if the sheet metal part in the width direction has outer edges, hereinafter also referred to as longitudinal edges, which are cut free. This means that the sheet metal part has such a smooth area at these edges. As a result, damage to the sheet metal part is avoided when providing the cutting structure or at least reduced and / or reduces a reject rate of the sheet metal part.

In principle, it is conceivable that the gills of the section sections adjacent in the width direction have the same orientation, that is to say they are shaped or elevated in the same direction. Also contemplated is embodiments wherein gills of widthwise adjacent cut portions are oriented in opposite directions. In these embodiments, therefore, the gills of such a section section are formed in one direction, in particular raised, while the gills of such adjacent in the width direction section section are formed in the opposite direction, in particular superscript. As a result of this, the fluid flowing through the rib structure is deflected in different directions as it passes through cut sections which are adjacent in the width direction through the gills, so that, in particular, turbulences of different orientations arise. In this case, it is particularly preferable if section sections or gill sections next to one another in the width direction have gills of different orientation.

In principle, the respective gill can protrude from the sheet metal part with any gill angle. The respective gill angle can be, for example, between 15 ° and 40 °. The gill angle is in particular 20 ° or 23 ° or 27 °.

In particularly preferred embodiments, the gill angle of gills adjacent cutting sections, in particular adjacent in the width direction cut sections, a varying course. That means that the Gill angle of such a section section may be larger or smaller than the gill angle of the gills of an adjacent, in particular next adjacent, such section section.

It is advantageous in this case if the gill angle of gills of the sections adjacent in the width direction decreases in the width direction. This decrease can in this case both stepwise, that is, with jumps, as well as continuously configured. That is, the gill angle along the width direction may decrease from one cut section to the next cut section. As a result, the change in the flow exerted by the gill angle on the flow, in particular a pressure drop in the flow, which increases with increasing gill angle, is taken into account, so that the influence of the gills in the width direction, in particular with regard to the pressure drop in the fluid caused by the decreasing gill angles, is taken into account becomes.

In preferred embodiments, the gill angle decreases from the cut sections with gills of equal orientation in the width direction. In other words, the gill angle of the gills of such a cut section or gill section is greater than the gill angle of the gills of such adjacent, in particular next adjacent, section section with gills of the same orientation.

Such a sheet metal part is advantageously produced by means of a pair of rollers. In this case, at least one roller of the pair of rollers on its outer circumference on a cutting contour, with which the sheet metal part is provided with the cutting structure. The cutting contour has corresponding cutting edges for introducing the cuts into the sheet metal part, wherein the cutting contour has at least two cutting sections with such cutting edges, which in the axial direction of the Roller are spaced from each other. The cutting sections are separated from each other in an axially extending roll longitudinal direction of the roller, wherein between separate cutting sections cutting-free smooth sections are arranged. The respective cutting edge may extend in the circumferential direction of the roller over a partial section of the roller. It is also conceivable if at least one of the cutting edges runs circumferentially. In this case, the cutting edges preferably extend in the circumferential direction with interruptions and thus have interruption sections. These interruption portions form in the sheet metal cutting-free forming sections or bending sections, in which the sheet metal part is formed or bent to form the ribbed structure. The cutting contour of the respective roller extends in the axial direction of the roller over a cutting contour length, wherein at least two such, spaced in the roll longitudinal direction or axial direction cutting sections have a different number of cutting edges. To provide the sheet metal part with the cutting structure, the sheet metal part is guided through the pair of rollers. This results in said cutting sections, which are separated by the smooth regions, wherein at least two of the cut sections have a different number of cuts. In this case, the width direction of the sectional structure runs along the axial direction of the roller pair or the respective roller, in particular parallel thereto. By the respective cutting portion so such a section section is introduced into the sheet metal part, wherein the smooth sections of the pair of rollers produce the smooth areas of the sheet metal part.

Advantageously, the cutting contour is formed asymmetrically with respect to a longitudinal center of the cutting contour width, which is referred to below as the cutting contour width center. As a result, it is possible, in particular, to realize correspondingly asymmetrical cutting structures described above.

Embodiments in which the sheet-metal part is introduced into the pair of rolls in such a way that a sheet-metal part edge of the sheet-metal part extends along the axial direction of the roll pair are preferred. This means, in particular, that a front edge of the sheet metal part, which is guided through the pair of rollers, is aligned along the axial direction of the roller pair, in particular parallel thereto. If the sheet metal part has a rectangular shape, this leads to the fact that the longitudinal edges of the sheet metal part are aligned transversely to the axial direction of the roller pair.

Embodiments in which the sheet-metal part is positioned before passing through the pair of rollers are advantageous in that a sheet-metal part edge middle of the sheet-metal part running along the axial direction is arranged with an offset relative to the cutting contour width center. This means in particular that the sheet metal part is not centered, but for example eccentrically or asymmetrically guided by the pair of rollers. This makes it possible in particular to produce sheet metal parts with different sectional structure geometries by a corresponding variation of the offset. In particular, this makes it possible to produce sheet metal parts of different sectional structure geometries with the same pair of rolls.

This also leads to the sectional structure width center of the sectional structure width of the sheet metal part running along the axial direction being offset with respect to the longitudinal center of the roll.

The offset is advantageously at least as large as such a cutting section width.

In this case, the roller pair is advantageously at least as large in the axial direction as the sheet metal part width. That is, the axially extending Roller length, preferably the cutting contour width, is greater than or equal to the extent of the extending through the pair of rollers in the axial direction extending extension of the sheet metal part, in particular as the sheet metal part width.

Embodiments in which the offset corresponds to the minimum section width or a multiple to the minimum section section width are preferred. As a result, in particular the subsequent processing of the sheet metal part, in particular the production of the gills and / or the forming of the sheet metal part to the rib structure, simplified.

It is furthermore preferred if the respective roller has such a smooth section at its edges extending in the axial direction.

Advantageous embodiments provide for aligning or arranging the sheet-metal parts in such a way to the pair of rolls and passing through the pair of rolls that at least one axially outward end or edge of the sheet-metal part, in particular such a longitudinal edge, corresponds to such a smooth section of the rolls. Accordingly, this end or edge is provided with such a smooth area.

It goes without saying that, in addition to the sheet metal part, the method for producing the sheet metal part also includes such a roll for producing the sheet metal part of the scope of this invention.

It is preferred in this case if the roller has at least two cutting sections which have different cutting section widths in the axial direction of the roller. In this way, a corresponding oversight of the sheet metal part with cut sections of different section widths is possible.

In advantageous embodiments of the roll, it is provided with such a cutting section having a minimum cutting section width, wherein the cutting section width of at least one of the other cutting sections corresponds to a multiple of the minimum cutting section width. As a result, corresponding cutting sections can be introduced in the sheet metal part.

It is preferred if the cutting edges are arranged axially equidistant at least one of the cutting sections, preferably all cutting sections. Thus, the corresponding cuts in the sheet metal part, at least one such section section, are arranged equidistantly.

It is understood that in addition to the sheet metal part and the associated manufacturing process, a heat exchanger with such a sheet metal part belongs to the scope of this invention. Such a heat exchanger in this case has a flow space through which a first fluid can flow. The first fluid in this case flows in a flow direction through the flow space, wherein in the flow space at least two tubes, in particular flat tubes, are arranged, in which, separated from the first fluid, a second fluid flows. This results in a heat exchange between the first fluid and the second fluid. Between such pipes, such a sheet metal part is arranged to improve the degree of heat exchange between the first fluid and the second fluid. The sheet metal part is arranged such that it can be flowed through by the first fluid, wherein the width direction of the sheet metal part preferably extends along the flow direction, such that the first fluid can pass through the gills on opposite sides of the sheet metal part when flowing through the sheet metal part.

In this case, it is particularly advantageous if the sheet-metal part is designed such that the gill angles decrease in the direction of flow adjacent cutting sections adjacent in the width direction. A larger gill angle leads to a larger pressure drop in the first fluid. Accordingly, in the case of relatively long flow paths through the heat exchanger or the sheet metal part, the pressure decrease in the flow direction can be reduced by the increasingly decreasing gill angle, with sufficient area for heat exchange being available through the longer flow path. With a shorter flow path less heat transfer surface is available, so that larger gill angles higher turbulence can be generated, which lead to a sufficient heat transfer despite the larger relative pressure losses.

Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Fig. 1

eine Frontansicht eines Blechteils mit einer Kiemen aufweisenden Rippenstruktur,

Fig. 2

einen Schnitt durch das Blechteil,

Fig. 3

eine Draufsicht auf eine Anlage zum Herstellen des Blechteils,

Fig. 4 und 5

die Ansicht aus Fig. 2 bei jeweils anderem Ausführungsbeispiel,

Fig. 6

die vergrößerte Ansicht aus Fig. 2

Fig. 7

die Ansicht aus Fig. 6 bei einem anderen Ausführungsbeispiel.

Show, in each case schematically,

Fig. 1

a front view of a sheet metal part with a gill-containing rib structure,

Fig. 2

a section through the sheet metal part,

Fig. 3

a plan view of a system for producing the sheet metal part,

4 and 5

the view Fig. 2 in a different embodiment,

Fig. 6

the enlarged view Fig. 2

Fig. 7

the view Fig. 6 in another embodiment.

In Fig. 1 a fin structure 1 of a heat exchanger 0 is shown, which is arranged between tubes 41 of the heat exchanger 0. The heat exchanger 0 in this case has a flow space 40 through which a first fluid can flow in a flow direction 39 in which the tubes 41 are arranged. The tubes 41 can be traversed by a second fluid, wherein the first fluid and the second fluid are fluidically separated. Through the tubes and the rib structure 1 there is a heat exchange between the first fluid and the second fluid, wherein the rib structure 1 in the flow direction 39 can be flowed through by the first fluid.

The rib structure 1 is a sheet metal part 2, which is provided with gills 3 and formed to form the rib structure 1 in the form shown, for example. bent over, is. In the present case, the ribbed structure 1 is formed wave-shaped, wherein in the view shown between the gills 3 Umbiegeabschnitte 4 of the rib structure 1 are arranged.

Fig. 2 shows the sheet metal part 2 after forming the rib structure 1 in section. It can be seen that the sheet metal part 2 is provided with a cutting structure 5, which comprises a plurality of cuts 6. The cuts 6 run in a Blechteillängsrichtung 7 and are spaced apart in a width direction 8. The width direction 8 thus extends inclined, preferably transversely to the cuts 6. In this case, the width direction 8 preferably runs along, in particular parallel to the flow direction 39. The cuts 6 of the cut structure 5 are grouped in such a way that the cut structure 5 has cut sections 10 which extend in the width direction 8 By cut-free smooth areas 11 are separated from each other. Thus, such a smooth region 11 is arranged between adjacent cut sections 10. In addition, it can be seen that the sheet metal part 2 is cut free on its outer side in the width direction 8 longitudinal edges 12 and corresponds to such a smooth region 11. The sectional structure 5 extends in the width direction 8 over a sectional structure width 13. The sheet metal part 2 extends in the width direction 8 over a sheet metal part width 14, which corresponds to the sectional structure width 13 in the example shown. At least two adjacent section sections 10 in the width direction 8 have a different number of such sections 6. In this case, the sectional structure 5 is asymmetrical with respect to a sheet metal part width center 15, indicated by a dashed line, which in the example shown corresponds to a sectional structure width center 16 of the sectional structure width 13.

The respective cut portion 10 extends in the width direction 8 over a cut portion width 17. It can be seen that the cut structure 5 has two types of cut portions 10. The first type of cutting sections 10 ' has a minimum section width 17 '. The section width 17 of at least one other section 10 corresponds to a multiple of the total length of the section 17 '. In the example shown, the sectional structure 5 and thus the sheet metal part 2 only such a section portion 10 'of the first kind, ie with minimum section width section 17', while the remaining section sections 10 have sectional section widths 17 ", which is a multiple of the total Section section width 17 ', in the example shown correspond to twice the minimum section section width 17'. The section sections 10 with the double section section width 17 "thus form section sections 10" of the second type.

By providing the sheet metal part 2 with the cuts 6 arise cutting edges 18, which, in particular the enlarged view in FIG Fig. 2 can be seen, reshaped, in particular superscript, be. In the example shown, 8 adjacent cut edges 18 of the respective cut section 10 are deformed in opposite directions in the width direction. Thus, by means of the respective cutting section 10, a gill section 19 with gills 3 and by means of the cutting structure 5, a gill structure 20 is produced. In this case, in the example shown, the gills 3 of adjacent cutting sections 10 and gill sections 19 are oriented in opposite directions.

Im in Fig. 2 As shown, the cut portion 10 has a smaller number of cuts 6 on the outside left than the other cut portions 10. Accordingly, the left outer gill structure 19 has a smaller number of gills 3 than the other gill portions 19.

The sheet metal part 2 is doing by means of in Fig. 3 shown attachment 21 produced. The plant 21 comprises a pair of rollers 22 with two rollers 23, of which in Fig. 3 Viewed only the top can be seen. The roller 23 is at her Outer circumference or its lateral surface provided with a cutting contour 24 which has a plurality of not fully circumferential cutting edges 25 which are arranged in an axial direction 26 of the roller 23 spaced. In addition, at least one interruption section 38 is provided in the roller 23, wherein in Fig. 3 such an interruption section 38 is visible. The respective interruption section 38 interrupts the cutting edges 25 in the circumferential direction. These interruption sections 38 thus form in the sheet-metal part 2 said bent-over sections 4, which serve for forming the sheet-metal part 2 into the rib structure 1. The cutting edges 25 are grouped into cutting sections 27, wherein the cutting sections 27 are separated from one another in the axial direction 26 by cutting-free smooth sections 28. The cutting edges 25 serve the purpose of introducing into the sheet metal part 2 associated cuts 6. Here is the in Fig. 3 non-visible roller 23 of the roller pair 22 provided on its outer circumference with a counter contour, which forms a negative for the cutting contour 24, such that with the cutting contour 24 corresponding cut structures 5 can be introduced into associated sheet metal parts 2. The cutting contour 24 extends along the axial direction 26 over a cutting contour width 29. The respective cutting portion 27 extends in the axial direction 26 over a cutting portion width 30. It can be seen that the roller 23 has two types of such cutting portions 27, the differ with respect to their cutting section width 30. A first type of the cutting portions 27 'has a minimum cutting portion width 30'. A second type of cutting portion 27 "has a cutting portion width 30" that is a multiple of the minimum cutting portion width 30 ', in the present example, twice the minimum cutting portion width 30'. At least two adjacent cutting sections 27 in the axial direction 26 have a different number of such cutting edges 25. Im in Fig. 3 shown example, the cutting sections 27 with the larger cutting section width 30 have a higher number of such Cutting 25 as cutting sections 27 having a smaller cutting section width 30. In Fig. 3 Furthermore, it can be seen that the cutting contour 24 is formed asymmetrically with respect to a cutting contour width center 31 of the cutting contour width 29 extending in the axial direction 26, wherein the cutting contour width center 31 is indicated by a corresponding, dashed line.

To provide the sheet metal part 2 with the sectional structure 5, the sheet metal part 2 is guided in a feedthrough direction 9, which in the example shown extends transversely to the axial direction 26 of the roller 23 and transversely to the width direction 8 of the sheet metal part 2, through the pair of rollers 22. In this case, the sheet metal part 2 is aligned such that the sheet metal part width 14 extends along the axial direction 26. Since the sheet metal part 2 is rectangular, thus extending transversely to the sheet metal part width 14 Blechteillänge 7 of the sheet metal part 2 transverse to the axial direction 26. The sheet metal part 2 is thus guided along its length 7 by the pair of rollers 22. The sheet 2, 2 "is thus guided through the pair of rolls 22 in such a way that a sheet part leading edge 35 of the sheet metal part 2 extends along the axial direction 26 of the roll pair 22, in particular parallel to the axial direction 26. The sheet width center 15 therefore corresponds to a sheet metal edge center 36 the sheet metal part leading edge 35. This results in the sectional structure 5 of in Fig. 2 shown sheet metal part 2, the in Fig. 3 provided with the reference numeral 2 'and II and shown by solid lines. It can be seen here that the sheet metal part width center 15 is arranged in the axial direction 26 with an offset 34 to the cutting contour width center 31. The sheet metal part 2 'is thus guided eccentrically or asymmetrically by the roller pair 22. This offset 34, also provided with the reference numeral 34 ', is greater than the minimum cutting section width 30'.

When passing the sheet metal part 2 through the pair of rollers, the cutting portions 27 'form the cutting portions 10', while the cutting portions 27 "constitute the cutting portions 10". Accordingly, the smooth sections 28 of the roller 23 correspond to the smooth regions 11 of the sheet metal part 2.

Especially in the enlargement of the Fig. 3 It can be seen that the cutting edges 25 of the respective cutting section 27 are arranged equidistant in the axial direction 26. This leads to the formation of sections 6 which are arranged equidistantly in the axial direction 26 and thus in the width direction 8 of the respective section 10.

In Fig. 4 2 shows another embodiment of the sheet-metal part 2, which is provided with the reference numeral 2 ". This sheet-metal part 2" differs from the sheet-metal part 2 'in FIG Fig. 2 in particular in that the sheet-metal part width 14, which is provided with the reference numeral 14 ", is larger than the sheet-metal part width 14 'of the sheet metal part 2. In addition, the sheet metal part 2" has a sectional structure 5, which in particular with respect to the number the cutting sections 10 'and 10 "and their distribution of the cutting structure 5 of the sheet metal part 2 differs' .This sheet metal part 2" is also prepared by means of the roller pair 22 of the system 21. For this purpose, a passage of the sheet metal part 2 "takes place in Fig. 3 additionally provided with III and shown by dashed lines, by the pair of rollers 22 analogous to the sheet metal part 2 ', with the difference that the sheet metal part width center 15 of the sheet metal part 2 "with an offset 34" in the axial direction 26 to cutting contour longitudinal center 31 through the Roller pair 22 is guided, which is greater than the offset 34 'of the sheet metal part 2'. In this case, both the sheet metal part 2 'and the sheet metal part 2 "are offset in the same direction relative to the cutting contour width center 31. This also results in the sheet metal part 2" such a sectional structure 5, in which at least two adjacent in the width direction 8 such Cut sections 10 have a different number of cuts 6. In addition, therefore, the sheet metal part 2 "also has asymmetrical formations of the sectional structure 5 with respect to the sheet metal part width center 15 or the sectional structure width center 16.

Another example of such a sheet metal part 2 is in Fig. 5 This sheet metal part 2 '"differs from the sheet metal parts 2', 2" in terms of the number and the arrangement of the different cutting sections 10 ', 10 ". Here, the sheet metal part width 14 of the sheet metal part 2 "', which is provided with the reference numeral 14"', larger than the sheet metal part width 14 "of the sheet metal part 2". To provide with the cutting contour 5, the sheet metal part 2 '"analogous to the sheet metal part 2" and 2' by the roller pair 22 is performed. In this case, this sheet metal part 2 '"in Fig. 3 shown with punk-dashed lines and provided with V. In contrast to the sheet metal part 2 'and 2 ", however, the sheet metal part 2'" without offset through the pair of rollers 22 is performed. This means that the sheet metal part width center 15 '"of the sheet metal part 2'" in the axial direction 26 to the cutting contour width center 31 is not spaced or coincides with the cutting contour width center 31. This also results, due to the different number of cutting edges 25 of at least two cutting sections 27 adjacent in the axial direction 26, a corresponding design of the cutting structure 5, in which at least two adjacent cutting sections 10 in the width direction 8 have a different number of such cuts 6. In addition, in this case as well, due to the asymmetrical design of the cutting contour 24, an asymmetrical formation of the sectional structure 5 is produced with respect to the sheet metal part width center 15 '''or sectional structure width center 16'''.

In all examples, therefore, after the forming of the cuts 6 to such gills 3 sheet metal parts 2 realized with a gill structure 20, the at least two in Width direction 8 has adjacent gill portions 19 with different number of gills 3. In addition, a gill structure 20 is realized, which is asymmetrical with respect to the sheet metal part width center 15.

In all embodiments, the sheet-metal parts 2 are also positioned relative to the pair of rollers 22, that in the axial direction 26 outer sheet edges 12 each correspond to at least such a smooth portion 28, such that in the region of the sheet edges 12 such smooth regions 11 are arranged. In Fig. 6 is the in Fig. 2 enlarged section shown again. In particular from the Fig. 6 it is apparent that the width direction 8 extends along the flow direction 39. Thus, the first fluid can be deflected by the gills 3 and thus reach opposite sides of the sheet metal part 2, which in particular also turbulence in the first fluid. This achieves an improved degree of heat exchange between the first fluid and the sheet metal part 2 and thus between the first fluid and the second fluid flowing through the tubes 41.

Out Fig. 6 Furthermore, it is apparent that the gills 3 of the respective cutting section 10 or gill section 19 protrude from the sheet metal part 2 with a pointed gill angle 42, the pointed gill angle 42 being the sharper, ie smaller, angle between the respective gill 3 and the sheet metal part 2. In this case, all shown gills 3 with the same gill angle 42 from the sheet metal part 2 from. Furthermore, it can be seen that the gills 3 are deformed in the opposite direction from adjacent cut sections 10 or gill sections 19 in the width direction 8, in particular in a raised position, and thus have opposite orientations.

In Fig. 7 is another embodiment of the heat exchanger 0 and the sheet metal part 2 is shown. In this embodiment, the gills 3 of the respective cutting section 10 and gill section 19 with a same gill angle 42 from the sheet metal part 2 from. How out Fig. 7 It can be seen, in addition, in the width direction 8 or in the flow direction 39 next adjacent cutting sections 10 and gill sections 19 are provided with oppositely oriented gills 3. Out Fig. 7 It can also be seen that the gill angle 42 of the gill sections 19 decreases in the flow direction 39. When in Fig. 7 Thus, in particular, the gill angle 42 also decreases, as shown in greater detail, from section sections 10 or gill sections 19 nearest in the width direction 8 or flow direction 39, with gills 3 of the same orientation in the flow direction 39. The first fluid in the flow direction 39 first strikes gills 3 with a larger gill angle 42, as a result of which higher turbulences but also a greater pressure drop in the first fluid are produced. In the flow direction 39, the relative pressure drop in the first fluid decreases due to the decreasing gill angle 42. In comparison to a sheet metal part 2 with a constant constant gill angle 42, the pressure drop in the first fluid is thus reduced, at the same time sufficient turbulence for a good heat exchange between the first fluid and the sheet metal part 2 is achieved.

Claims (18)

Sheet metal part (2) with a gill (3) having rib structure (1), - With a gills (3) forming the sectional structure (5) having at least two each two cuts (6) having cut portions (10) in a width direction (8) of the sheet metal part (2) separated by cut-free smooth regions (11) are, wherein the sectional structure (5) extends in the width direction (8) over a sectional structure width (13), - wherein the gills (3) of the respective cutting section (10) protrude with a pointed gill angle (42) from the sheet metal part (2), characterized,
in that at least two section sections (10) adjacent in the width direction (8) have a different number of sections (6). Sheet metal part according to claim 1,
characterized,
in that at least two of the cut sections (10) have different section widths (17) extending in the width direction (8). Sheet metal part according to claim 2,
characterized,
that such a cut portion (10, 10 ') having a minimum sectional portion width (17, 17'), wherein the interface section width (17, 17 ") at least one other cut portion (10, 10") to a multiple of the whole of the minimum sectional portion -Width (17, 17 ') corresponds. Sheet metal part according to claim 2 or 3,
characterized,
that cut sections (10, 10 ') with different section widths (17) are arranged alternately at least in sections. Sheet metal part according to one of claims 1 to 4,
characterized,
that the cuts (6) are arranged at least of such a cut portion (10) equidistantly in the widthwise direction (8). Sheet metal part according to one of claims 1 to 5,
characterized,
that at least one such section section (10) has a different number of sections (6) than another such section section (10). Sheet metal part according to one of claims 1 to 6,
characterized,
in that the gills (3) are oriented in opposite directions by two section sections (10) adjacent in the width direction (8), Sheet metal part according to one of claims 1 to 7,
characterized,
in that the gill angle (42) of gills (3) of such a cut section (10) is smaller than the gill angle (42) of the gills (3) of another such cut section (10). Sheet metal part according to one of claims 1 to 8,
characterized,
that the gill angle (42) of the gills (3) in the width direction (8) adjacent cut sections (10) in the width direction (8) decreases. Sheet metal part according to claim 7 and 9,
characterized,
in that the gill angle (42) of the gills (3) decreases in the width direction (8) adjacent cut portions (10) with the same orientation of the gills (3) in the width direction (8). Method for producing a sheet metal part (2) with a gill (3) having rib structure (1) for a heat exchanger, wherein a roller pair (22) with two rollers (23) is provided, - At least one of the rollers (23) has on its outer periphery a cutting contour (24) for providing the sheet metal part (2) with a cutting structure (5) for forming the gills (3), - The cutting contour (24) at least two cutting sections (27) with cutting edges (25) for providing the sheet metal part (2) with cuts (6) of the cutting structure (5), which are spaced apart in the axial direction (26) of the roller (23) . - The cutting sections (27) in the axial direction (26) by cutting-free smooth sections (28) are separated from each other, - The cutting contour (24) in the axial direction (26) over a cutting contour width (29) at least two adjacent cutting sections (27) in the axial direction (26) have a different number of such cutting edges (25), - The sheet metal part (2) for providing with the cutting structure (5) through the pair of rollers (22) is guided. Method according to claim 11,
characterized,
in that the sheet-metal part (2) is introduced into the pair of rollers (22) such that a sheet-metal part edge (35) of the sheet-metal part (2) extends parallel to the axial direction (26) of the roller (23). Method according to claim 11 or 12,
characterized,
that the sheet metal part (2) prior to passing through the pair of rollers (22) relative to the roller pair (22) is positioned so that extending one along the axial direction (26) sheet metal part edge center (36) extending with an axial (26) displacement (34) to a cutting contour width center (31) of the cutting contour (24) is arranged. Method according to claim 13,
characterized,
in that the sheet metal part (2) is positioned relative to the roller pair (22) such that the offset (34) corresponds to at least one cutting section width (30) extending in the axial direction (26) of such a cutting section (27). Method according to one of claims 11 to 14,
characterized,
in that the sheet metal part (2) is arranged in such a way to the pair of rolls (22) and guided through the pair of rolls (22) that at least one sheet metal part width edge (12) of the sheet metal part (2) lying in the axial direction (26) has such a smooth portion (2). 28) corresponds. Roller (23) of a roller pair (22) for a method according to one of claims 11 to 15. Heat exchanger (0) with a in a flow direction (39) through which a first fluid flowed through the flow chamber (40) and at least two in the flow space (40) and arranged to flow through a second fluid pipes (41), wherein between the tubes (41) from the The first fluid-permeable sheet metal part (2) according to one of claims 1 to 10, which is produced in particular according to a method according to one of claims 11 to 15, is arranged, the width direction (8) along the flow direction (40). Heat exchanger according to claim 17,
characterized,
in that the heat exchanger (0) is provided with a sheet-metal part (2) according to claim 9 or 10, wherein the gill angle (42) of the gills (3) decreases in the direction of flow (39) of cutting sections (10) adjacent in the width direction (8).

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