Method for producing a composite material, and composite material

Abstract

A method for producing a composite material by plating a band arrangement with a top side (O) and a bottom side (U), wherein the band arrangement comprises at least a first strip and a second strip, which form between them a filling channel, wherein the band arrangement comprises at least one filler strip, wherein the abovementioned band arrangement is plated, wherein a part of the filler strip, during the plating, is extruded into the filling channel; and a composite material, characterized in that it has been produced according to the method as disclosed.

Claims

1. A method for producing a composite material, the method comprising: supplying a band arrangement to be plated, the band arrangement comprising: a top side (O) and a bottom side (U), at least a first strip and a second strip, wherein the first and/or the second strip, respectively, is/are composed of two or more independent and discrete strips, at least one filler strip, and a filling channel formed between the at least first and second strips; plating the band arrangement; and extruding, during the plating, a part of the filler strip into the filling channel.

2. The method of claim 1, wherein the filler strip is disposed above the filling channel.

3. The method of claim 1, wherein the filler strip has a greater width (B.sub.S) than the filling channel (B.sub.F).

4. The method of claim 1, wherein the band arrangement comprises more than two strips and/or more than one filler strip, wherein the strips form between them filling channels.

5. The method of claim 1, wherein the filler strip or filler strips of the band arrangement have a lesser strength than the strips of the band arrangement prior to the plating.

6. The method of claim 1, wherein the filler strip or filler strips of the band arrangement do not exceed a tensile strength (Rm) of 300 N/mm.sup.2 prior to the plating.

7. The method of claim 1, wherein the first and the second strip of the band arrangement have a tensile strength prior to the plating (Rm) of at least 200 N/mm.sup.2.

8. The method of claim 1, wherein the material for the first and/or the second strip is selected from iron and nonferrous metals and their alloys, and/or the material for the filler strip or filler strips is selected from iron and nonferrous metals.

9. The method of claim 1, wherein the bottom side (U) of the band arrangement is formed by the strips and the filling channel or filling channels.

10. The method of claim 1, wherein the top side (O) of the band arrangement is formed completely by the filler strip or filler strips.

11. The method of claim 1, wherein the top side (O) of the band arrangement is formed only in some sections by the filler strip or filler strips.

12. The method of claim 1, wherein the first and the second strip have, in the region of at least one filling channel, recesses (A) for receiving a part of the filler strip, wherein the filler strip projects from the plane formed by the first and the second strip on the top side.

13. The method of claim 1, wherein the first and the second strip have, in the region of at least one filling channel, recesses (A) for receiving a part of the filler strip, wherein the filler strip does not project from the plane formed by the first and the second strip on the top side.

14. The method of claim 5, wherein the strength difference is at least 50 N/mm.sup.2 tensile strength (Rm).

15. The method of claim 8, wherein the material for the first and/or the second strip is selected from steel, special steel and nonferrous heavy metals, and/or the material for the filler strip or filler strips is selected from steel, special steel, nonferrous metals, precious metals, aluminum and their alloys.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further features and advantages of the present invention become clear from the following description of preferred illustrative embodiments with reference to the accompanying figures, in which:

(2) FIG. 1 shows a cross-sectional representation of a band arrangement;

(3) FIG. 2 shows a cross-sectional representation of a composite profile produced from the band arrangement according to FIG. 1;

(4) FIG. 3 shows a cross-sectional representation of another band arrangement;

(5) FIG. 4 shows a cross-sectional representation of a composite profile produced from the band arrangement according to FIG. 3;

(6) FIG. 5 shows a cross-sectional representation of a further band arrangement;

(7) FIG. 6 shows a cross-sectional representation of a composite profile produced from the band arrangement according to FIG. 5;

(8) FIG. 7 shows a cross-sectional representation of an additional band arrangement;

(9) FIG. 8 shows a cross-sectional representation of a composite profile produced from the band arrangement according to FIG. 7;

(10) FIG. 9 shows a cross-sectional representation of yet another band arrangement;

(11) FIG. 10 shows a cross-sectional representation of a composite profile produced from the band arrangement according to FIG. 9;

(12) FIG. 11 shows a band arrangement according to FIG. 1 in a perspective view onto the top side;

(13) FIG. 12 shows a band arrangement according to FIG. 1 in a perspective view onto the bottom side;

(14) FIG. 13 shows a composite material produced from the band arrangement according to FIG. 1 or FIGS. 11 and 12 in a perspective view onto the top side;

(15) FIG. 14 shows a composite material produced from the band arrangement according to FIG. 1 or FIGS. 11 and 12 in a perspective view onto the bottom side.

(16) FIG. 15 is a perspective view of the bottom side of the band arrangement of FIG. 1 showing the first strip and the second strip composed of at least two individual strips in accordance with certain aspects of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(17) The proportions in the figures do not necessarily correspond to the real proportions, but serve substantially for illustrative purposes.

(18) The following reference symbols are used in the figures: L longitudinal axis B.sub.G total width B.sub.F width of the filling channel H.sub.F height of the filling channel B.sub.S width of the filler strip A recess top side U bottom side 1a (first) strip 1b (second) strip 1c (third) strip 1d (fourth) strip 2a filling channel 2b (second) filling channel 2c (third) filling channel 3a filler strip 3b (second) filler strip

(19) In the method proposed according to the invention, a band arrangement is fed to a roll plating device (not represented) or to the inlet of a roll plating device and leaves the roll plating device or the outlet as a plated composite material. A preferred plating method for the present invention is constituted by the roll plating. In principle, other plating methods are, however, also conceivable.

(20) The band arrangement comprises at least a first strip 1a and a second strip 1b, wherein the first strip and the second strip form between them a filling channel 2a. The filling channel 2a can be configured, for instance, by an appropriate spacing of the strips. The filling channel can, however, also be configured in the strips by spacing of the strips and/or by an appropriate recess, preferably a recess of rectangular cross section, as represented, for instance, in FIG. 5.

(21) As shown in FIG. 15, the strips per se can also be composed of at least two individual strips or a plurality of strips, preferably of individual strips of different width, so that the respective part of the filling channel emerges from the difference in width of the filler strips. The individual strips can already beforehand have been connected, in particular plated, into a strip, but can also be connected to one another during the below-described plating operations with extrusion of the filler strip or filler strips. This measure can preferably be considered instead of making a recess in a monolithic strip.

(22) The filling channel can also be referred to as a groove. The filling channel runs in the longitudinal direction L of the band arrangement. The strips here preferably respectively form a part of the filling channel.

(23) In addition, the band arrangement comprises at least one filler strip 3a. The filler strip 3a is disposed above the filling channel 2a and has a greater width B.sub.S than the filling channel 2a. The filler strip 3a is in particular designed such that it would not fit into the filling channel 2a during the band arrangement stage. The band arrangement entering into the roll gap thus has no continuously rectangular cross section.

(24) As the preferred width B.sub.F of the filling channel, an order of magnitude of 0.5 mm to 10 mm can be quoted.

(25) As the preferred height H.sub.F of the filling channel, an order of magnitude of 0.5 mm to 4.5 mm can be quoted.

(26) The filler strip 3a preferably has a lesser strength, in particular tensile strength (Rm), than the first strip 1a and the second strip 1b. The filler strip 3a should herein on the inlet side not exceed a tensile strength (Rm) of 300 N/mm.sup.2. The first strip 1a and the second strip 1b, which ultimately act like a die for the filler strip 3a, should moreover have a tensile strength (Rm) of at least 200 N/mm.sup.2 prior to the plating. In the design of the band arrangement, a strength difference of min. 50 N/mm.sup.2 between the strips and the filler strip or filler strips should preferably be sought. The quoted values relate to values prior to the plating.

(27) As the material for the strips, iron and nonferrous metals, as well as their alloys, in particular steel, special steel and nonferrous heavy metals, can be considered.

(28) As the material for the filler strip or filler strips, iron and nonferrous metals, in particular steel, special steel, nonferrous heavy metals, precious metals, aluminum and their alloys, can be considered.

(29) The forming of the band arrangement into the composite material shall be described in greater detail below.

(30) The band arrangement or the individual strips or individual strips of the band arrangement can be unwound, for instance, from rolls and brought together, via suitable guides, to form the envisioned cross section of the band arrangement. Here, a guide having an opening which broadly corresponds to the cross section of the band arrangement can, for instance, be employed. A pin which runs in the filling channel and holds the strips appropriately at a distance apart or in position can, for instance, be provided. The guide can crucially help to ensure that the filling channel 2a is formed between the strips.

(31) The softer plating partner, that is to say the filler strip, is fed to the roll gap preferably only monolithically.

(32) In a simple embodiment of the band arrangement, as represented, for instance, in FIG. 1, the filler strip covers the band arrangement over the entire width B.sub.G, in particular, however, the filler strip 3a covers the filling channel 2a. In this respect, the top side of the band arrangement be completely formed by the filler strip 3a, while the bottom side are formed by the first strip 1a and the second strip 1b, interrupted by the filling channel 2a. As a result, a band arrangement is obtained, wherein the filling channel 2a is initially still recessed.

(33) During the plating—as in a standard plating process—the plating partners, in particular the filler strip 3a, are connected to the first strip 1a and the second strip 1b. As is customary in plating, a basically non-releasable connection is formed between the plating partners.

(34) During the plating, however, an extrusion of a part of the filler strip 3a into the filling channel 2a likewise takes place. The firmer plating partner, that is to say the strips 1, herein acts as a die for the basically softer plating partner, that is to say the filler strip or filler strips. Because of the function of the strips, the strips 1 can also be referred to as die strips.

(35) On the outlet side, a composite material which combines different metals side by side, viewed in the direction of rolling, and the transverse profile of which is approximately rectangular, preferably rectangular, is formed. Preferably, that part of the filler strip 3a that is extruded into the filling channel 2a completely fills the filling channel 2a. The bottom side of the composite material is correspondingly formed by the first strip 1a, the second strip 1b and the filler strip 3a extruded into the filling channel 2a. In this embodiment, the top side of the composite material is preferably still completely formed by the filler strip 3a.

(36) In cross section, those regions in the resulting composite material which emerge from the strips and the filler strip or filler strips are clearly discernible.

(37) In principle, the band arrangement can also contain more than two strips. In FIG. 3 is represented, for instance, a band arrangement which is formed of four strips and a filler strip, in particular a first strip 1a, a second strip 1b, a third strip 1c, a fourth strip 1d, and a filler strip 3a. In this respect, the first strip 1a and the second strip 1b form between them a first filling channel 2a, the second strip 1b and the third strip 1c form between them a second filling channel 2b, etc. In the present case too, the filler strip 3a covers the strips 1a to 1d over their entire width B.sub.G. The filling channels 2a, 2b, 2c can, but do not all have to have the same width B.sub.F.

(38) Such a band arrangement, too, can be plated in a plating device, preferably a band plating device. The strips 1a to 1d are connected to the filler strip 3a, the filler strip 3a extruded partially into the filling channels 2a to 2c. As a result, a composite material as represented in FIG. 4 is obtained. The top side is formed completely by the filler strip 3a, the bottom side alternately by the strips and the filler strip extruded into the filling channels.

(39) In a further variant of the production process according to the invention, a part of the filler strip 3a can also be accommodated in recesses A of the strips 1a, 1b, which are disposed in the mutually adjacent strips. It can further be provided that the filler strip 3a protrudes over the plane formed out of the strips. Such a band arrangement is represented in cross section in FIG. 5. It can be seen that the resulting cross section of the band arrangement is not rectangular. Rather, the top side of the band arrangement is of stepped configuration. Nevertheless, the filling channel 2a is disposed between the strips 1a, 1b and is covered by the filler strip 3a. However—in contrast to the previously described variants—not the entire top side of the band arrangement is formed by the filler strip 3a. Rather, the top side is correspondingly formed by the strips 1a, 1 b and the filler strip 3a. The bottom side is here too formed by the strips 1a, 1b, which correspondingly form between them a filling channel 2a.

(40) As already outlined above, the band arrangement is fed to a plating device and appropriately plated. The filler strip 3a is extruded partially into the filling channel 2a. The filler strip can here be of more voluminous design and can provide correspondingly more material for the extrusion process, in particular since it can be embedded a little via the recesses. Equally, the recesses form an additional guide for the entry of the band arrangement into the roll plating device. Insofar as the filler strip is elevated, so to speak, over the plane of the strips, yet more material can here be provided for the extrusion process. Filler strips should, however, preferably be used or oriented such that they have a greater width than height when they are inserted in the filling channel or filling channels.

(41) There can also be provided more than one filler strip, for instance a first filler strip 3a and a second filler strip 3b. Such a variant is represented in FIG. 7 (band arrangement) and FIG. 8 (composite material). The filler strips here form the entire top side of the band arrangement.

(42) A variant according to FIG. 9 and FIG. 10 is also conceivable. Here, it is provided for the band arrangement, for instance, that the top side O of the band arrangement is formed only in some sections by the filler strips 3a, 3b. It is also provided that the strips 1a, 1b, 1c have, in the region of the respective filling channel 2a, 2b, recesses A for receiving the respective filler strip 3a, 3b. The filler strips 3a, 3b are here also of elevated configuration.

(43) The abovementioned variants are not exhaustive. It is in particular conceivable that the band arrangement is formed of more than two strips and/or more than one filler strip, correspondingly has one or more filling channels. The surface of the band arrangement can be wholly or partially formed the filler strip or filler strips. Insofar as the surface of the band arrangement is partially formed by the filler strip or filler strips, recesses in the region of the filling channels can preferably be considered, wherein in particular the filler strip projects from the plane formed by the strips on the top side.

(44) As a result, in all cases a composite material is obtained in the form of a strip plating, which can be produced extremely rationally, in particular comparatively narrow portions, in the form of the filler strips extruded into the filling channels, can be created, which filler strips appear, for instance, on the bottom side of the composite material as very narrow portions.