MXPA01006631A - Metal foil connection and solder grain fraction for metal foil connection - Google Patents

Abstract

The invention relates to a metal foil connection (1) between a first (2) and a second (3) metal foil, where the first (2) and the second (3) metal foil both have a thickness of less than 0.05 mm and are soldered together at a connection (4) which presents a corner-like space (5) which is filled with solder (6). The ratio of a mass ML of the solder to a mass MF of those sections (7, 8) of the metal foils which contact the solder (6) situated in the corner-shaped space (5) is approximately constant. The invention also relates to a suitable solder grain fraction and a suitable method for producing metal foil connections of metal foils having a thickness of less than 50 micrometers.

Description

CONNECTION OF METAL SHEET AND FRACTION OF WELDING PARTICLES FOR CONNECTION TO METAL SHEET The present invention relates to a metal foil connection of a first and a second metal foil. The first and second metal sheets each have a thickness of less than 0.05 mm, and are welded together at a connection point. The connection point forms an angle that is filled with welding medium. The measurement further relates to a honeycomb body of laminated metal layers. Laminated metallic layers are formed of metal sheets that are structured at least in part, wherein the metal sheet has a thickness of less than 0.05 mm. The laminated metal layers are at least partially welded together. At the soldered connection points they have respectively one or two angles filled with welding means. The invention also relates to a particle fraction of welding medium, metal foil for lubricating a welded connection, and a method for manufacturing a metal foil connection, of the first and second metal foil by means of a particle fraction of welding medium of sheet metal.

Welding methods and welded connections, for example for a metal honeycomb body, are the state of the art for laminated metal layers. DE 42 19 45 Cl describes that a honeycomb body is immersed in a fluidized bed of welding powder. The cue eo of. pre-prepared honeycomb forms, at the desired points, particles of the welding medium from a fraction of particles of welding medium. The size of the particles of the welding medium should be between 1 to 200 microns, preferably between 38 and 125 microns, wherein the particle sizes in the lower half of this range are desirable more frequently than in the upper half. Other methods to apply the 'means of welding also. They are written in that document. The methods for applying the welding means, which correspond to the prior art, are used successfully in the welding of honeycomb bodies. The laminated metallic layers from which metal sheets are made with a material thickness of at least 50 microns and more. The object of the present invention is now to provide a metal / durable foil connection for thin metal foils with a thickness of less than 50 micrometers, in particular less than 40 micrometers, and a means for making this connection. This object is solved with a metal leaf connection, a first and a second metal sheet according to the features of claim 1, an additional metal leaf connection with the features of claim 2, or a honeycomb body of the Laminated metallic layers with the characteristics according to claim 11, or a fraction of particles of metal foil welding means for the manufacture of a connection welded with the features according to claim 12, a method for making a connection of metal foil with the features of claim 17, and a further method for making a foil connection with the features according to claim 18. Additional advantageous configurations and further developments are described in the appended claims. A metal foil connection of a first and a second metal foil, wherein the first and second foil have a thickness of less than 0.04 mm, and are welded together at a point of. connection, wherein the connection point forms an angle that is filled with air, has a mass ML of the welding means, and a mass MF of those sections of the metal sheets that the welding means in the angle contact, which they are in an approximately predeterminable relationship, wherein the ratio of MF / ML ranges from approximately * 4 to approximately 8. A metallic sheet connection of a first and a second metal sheet, wherein the first and second metal sheet have a thickness of less than 0.04 mm, and are welded together at a connection point, where the connection point has one or two angles that are filled with the welding medium , has at the angle a mass ML of welding means in a ratio to a metal sheet thickness DF of approximately ML /?) F = 8 g / m to 16 g / m. When attempting to weld very thin metal sheets with a material thickness of less than 50 microns, in particular when manufacturing a honeycomb body, it was determined that the cells simply melt when the honeycomb body is brought to the welding temperature. It was also determined that the cells of the honeycomb body were deformed. Only when a quantity of the solder means applied per connection point was used, according to the rule for the adjustment described hereinabove with respect to the sheet metal thicknesses, used up to now, could the amount of solder means defined in this way, to be introduced from the angle, resulting on the one hand in the metallic sheet that is not separated and the formation of separations at the edges that are prevented and on the other hand, however, that a durable connection of Welding points: If a metal foil is used for a metal foil connection, the foil thickness DF, of which is between Q., 0"5 mm and 0.03, mm or less, the mass of the welding medium ML to be used for the metal foil connection is selected, in an unexpected manner, in an approximately linear dependence with respect to the thickness DF of foil. The thinner the metal sheet thickness DF, the smaller the mass of the solder ML that will be used. An upper limit as well as a lower limit for the mass of the solder means ML that can still be used can be determined, as a consequence, for some thicknesses DF of metal foil and interpolated or extrapolated for other thicknesses of metal foil. establishes a relationship between the mass of the ML welding medium and the thickness DF of the metal sheet, an upper limit in the degree of the ratio of ML / DF = 14.6 g / m, with a variation of + 5% and -5% proved to be advantageous As a lower limit for the still useful ratio of the mass of the solder ML to the thickness DF of the metal sheet, it has proved advantageous at a ML / DF = 8.7 g / m ratio, with a variation of + 5% and -5% Of these two ratios, given as limit, upper and lower limit, the "range to be used" for a metal sheet DF thickness of less 0.05 mm to about 0.03 mm or less, It can be determined very accurately. The best results with respect to the durability of the metal foil connection have been produced with a ratio of the mass of the welding medium ML in the angle compared to the thickness DF of metal foil, is approximately ML / DF = 11 g / m, with a variation of + 15% and -10%. When sheet metal DF thicknesses are "used" for the metal foil connection of approximately 0.03 mm or less, the linear relationship described above can also be used in order to obtain satisfactory results.Unexpectedly, it has been shown, however , that with metallic sheet DF thicknesses less than 0.03 mm, not only is there a linear relationship between the amount of the welding medium that can be used and the metal sheet thickness DF, however, the gradient of this linearity changes with respect to a range of metal sheet thickness DF from less than 0.05 mm to approximately 0.03 mm or less. ' Somewhat flattened, preferentially, with metal sheet thicknesses DF of approximately, or less than 0.03 mm, an upper limit of the mass of the solder ML is selected depending on the thickness DF of metal sheet along the length of the sheet. .A curve that passes through the following points (ML / DF; DF): (14.6 g / m, 0.03 mm), (14.8 g / m, 0.025 mm), (16 g / m, 0.02 mm), (27 g / m, 0.01 mm). A lower limit with a metal sheet thickness DF of approximately, or less than 0.03 mm, for the "mass" of the solder ML to be used, depending on the metal sheet thickness DF, is advantageously selected from a curve which passes along the following points (ML / DF; DF): (8.6 g / m, 0.03 mm), (9 g / m, 0.025 mm),. (9.2 g / m 0.02 mm), 16 g / m; 0.01 mm). Extremely durable metal sheet connections with a metal sheet thickness DF of approximately or less than 0.03 mm have been produced when the mass of the solder ML, depending on the metal sheet thickness DF, is selected from a curve that passes through the following points (ML / DF, DF): (11 g / m, 0.03 mm), (11.2 g / m, 0.025 mm), (12 g / m, 0.02 mm), (20 g / m: 0.01 mm).

The variation of + 5% and -5% for these curves is also applicable. A preferred area of application for the metal foil connections described hereinabove is the honeycomb bodies of laminated metal layers. This honeycomb body of laminated metal layers is formed of metal sheets that are structured at least in part. The metal sheet has a thickness of less than 0.05 mm, wherein the laminated metal layers are welded at least partly to each other, and at the welded connection points they respectively have one or two angles filled with the welding means. When using the rules for adjustment noted above for the connection of metal sheets, it has been shown that the durability of the honeycomb body with respect to mechanical stresses was much greater compared to when amounts of the solder medium which previously were the rule. When the majority of widely varying sheet thicknesses are used, when taking into account the adjustment rule between the mass of the welding medium ML and the thickness DF of the metal sheet, the most advantageous amount of the welding means could be used. Find in a faster and simpler way. However, not only the durability but also the problems of cell burning, cell formation, layer distribution, separation formation at the edges described above were avoided by observing the adjustment rules for metal sheet connections. An additional medium that is going to be able to make a durable metal foil connection is obtained by using a suitable fraction of particles of metal foil solder.The fraction of metal foil solder particles for the manufacture of a welded connection between a first and a second metal sheet forming an angle in the welded connection, in particular for the fabrication of the honeycomb connection of the metal sheet ^ where the fraction of particles of welding medium has a particle size between 0.01 mm and 0.2 mm, is composed according to the thickness of metal sheet as follows: - for a thickness of approximately 0.05 mm of particles of welding medium with a maximum diameter of 0.135 mm and a minimum diameter of 0.015 mm, - for a thickness of approximately 0.02 mm of particles of welding medium with a maximum diameter of 0.08 mpv and "* a minimum diameter of 0.02 mm, - for a thickness that is between these, with a maximum diameter and a minimum diameter of particles of welding medium, which occurs in an approximately linear manner of the corresponding values for the thickness of the metal sheet of 0.05 mm and 0.02 mm, and additionally a maximum value of a Gaussian distribution in percent with respect to the respective total diameter of the fraction of particles of solder means is arranged approximately central between the maximum diameter and the minimum diameter of the fraction of particles of solder means. In an unexpected manner, a linear relationship between the maximum diameter and the minimum diameter of the particles of the welding medium and a fraction of particles of welding medium for the respective thicknesses of metal sheet to be connected has been found. Additionally, very durable metal sheet connections for sheet metal DFs of approximately, or less than, 0.05 mm, in particular 0.03 mm or less, have been obtained, since the maximum value of the Gaussian distribution is not shifted to a smaller fraction of solder particles as the thickness of the metal sheets becomes smaller, but instead remains fixed in the center within the distribution. The bell shape of the Gaussian distribution remained in the center with decreasing metal sheet thicknesses, and if it changed with the metallic sheet thicknesses that were up to 0.01 mm, an extremely durable metal sheet connection resulted. For a maximum diameter of the fraction of particles of welding medium, the following rule for adjustment has proven to be extremely advantageous. The maximum diameter of the fraction of particles of welding medium results from the following values: for a thickness of approximately 0.05 mm of the particles of the welding medium with a maximum diameter of 0.125 mm and in particular 0.105 mm, for a thickness of approximately 0.02 mm of the particles of the welding medium with a maximum diameter of 0.07 mm and a minimum diameter of 0.063 mm, - for a thickness of metal sheet that is between these, with a maximum diameter of the particles of the medium of welding, which occurs in an approximately linear manner of the corresponding values for the thickness of the metal sheet of 0.05 mm and 0.02 mm, For a minimum diameter of the fraction of particles of the welding medium, the following has proved extremely advantageous rule for adjustment: the minimum diameter of the fraction of particles of the welding medium results from the following values: - for a thickness of approx. 0.05 mm of the particles of welding medium with a minimum diameter of 0.018 mm, in particular 0.023 mm, - for a thickness of approximately 0.02 mm of the particles of welding medium with a * minimum diameter of 0.03 mm or less , in particular 0.035 mm, - for a thickness of metallic foil that is between these, with a maximum diameter of particles of the welding medium, which are produced in an approximately linear manner from the corresponding values for the thickness of the metallic foil of 0.05 mm and 0.02 mm. For a thickness of the metal sheet of 0.03 mm or less, it was determined, in an unexpected manner, that the minimum diameter of the particles of the welding medium should not decrease. In contrast, the metal foil connections were particularly durable when the minimum diameter was approximately 0.03 mm or less, in particular 0.035 mm. The particles of the welding medium with a smaller diameter of these do not increase the durability. In contrast, deterioration is frequently determined. Additionally, for the fabrication of a durable metal foil connection, a method has been provided in which a first and a second metallic foil are connected together by means of a fraction of parts of welding medium-sheet metal, wherein the first and the second metal sheet has a thickness of less than 0.05 mm, - where the two metal sheets are welded together at a connection point and the connection point forms one or two angles, - where the first and second metal sheets they are welded before they are brought into contact with the "fraction of" -particle of the metal foil welding medium.The particle fraction of the foil welding means is now adjusted such that it satisfies the rules for adjustment described above. An additional method for making a connection of metal sheets of a first and a second metal sheet by means of a fraction of particles of medium of metal sheet welding, in Cjoroáe the first and second metal sheets have a thickness of less than 0.05 mm, - where the two metal sheets are welded together at a point of connection and the connection point forms an angle, - wherein the first and second metal foil are stuck before they are put in contact with the particle fraction of the metal foil welding means, contacting the first and second foil sheets in a first step with a first fraction of particles of metal foil welding medium. SubsequentlyThe metal sheets are again contacted in a second step with a fraction of particles of the metal foil welding medium.The metal foils are used with a thickness of 0.03 mm or less.With these thicknesses of sheet material unexpectedly, a two-step method for the application of the welding medium has proven to be more advantageous, in spite of the high cost, than an application of a single step of the welding medium. - also a better control of the amount of welding medium introduced compared to only a single step of the particle fraction of the metal foil welding medium.This two-step method is further improved since the first fraction of particles of the medium of metal foil welding is selected such that it has a larger maximum diameter and a smaller minimum diameter of the particles of the welding medium than a fraction n of medium particles solder foil used in the second step. Advantageously, in the first step, the first fraction of particles of the metal foil welding means is adjusted as previously described above. The second fraction of particles of the metal foil welding means is advantageously selected again for the second step such that the maximum diameter of the particles of the welding medium is less than 0.07 mm and the minimum diameter of the particles of the welding medium is greater than 0.04 mm. When these rules are observed for adjustment, they have occurred with particularly durable exceptions of metal sheets. In particular with the welding of a honeycomb body, metal sheet connections were produced that do not have a failure rate, or have an extremely low failure rate, directly from the welding process and also in subsequent tests. The additional advantageous configurations and features of the invention will be shown in the following drawings. These characteristics can be combined respectively with configurations and additional modalities, -advantageous. Shown in: FIG. 1 is an angle formed by two metal sheets, FIG. 2 shows the relationship between a quantity of the welding medium per connection point of a metal sheet connection depending on the thickness of the metal sheet used, FIG. 3 an angle filled with a fraction of particles of welding medium, normal, the Figure an angle filled with a fraction of particles of the modified welding medium, Figure 5 a dependence between the fraction of particles of the welding medium used and the thickness of metal foil used, Figure 6 a relationship between the amount of the welding medium used depending on the thickness of the foil, Figure / '? . a relationship between the amount of the-particle fraction of solder means used depending on the thickness of metal sheet to be used, FIG. 8 a table of maximum and minimum ratios of the mass ML of the solder means to the thickness DF of the metal foil, Figure 9 a schematic Gaussian distribution of the diameter of the fraction of the solder medium particle, and Figure 10 an additional relationship between the amount of the soldering means "" used depending on the thickness of the foil. Figure 1 shows a metal leaf connection 1 with a first 2 and a second 3 of metal foil. The metal sheets 2, 3 are welded at a connection point 4. The connection point 4 is at an angle 5 (wedge or corner) by means of the joint meeting of the first metal sheet 2 and the second metal sheet 3. At angle 5, the welding means 6 is located. It is, that the welding means 6 is in the form of a fraction of particles of welding medium applied to a first section 7 and a first section 8 of the first metal sheet and respectively of the second metal sheet 3. This is possible, for example according to a method that precedes DE 4 219 145 Cl, which subsequently will be designated generally as a paste, and to the description of which reference will be made. The welding means 6 can be applied, sinv. However, according to different methods of application of the welding medium described in DE 4 210 145 Cl, which will also be referred to herein. The first metal sheet 2 and the second metal sheet 3 each have a metal sheet thickness DF of less than 0.05 mm. The surfaces of the two metal sheets 2, 3 can be prepared respectively, in advance, for a better adhesion of the welding means 6, or they are provided with microstructures. A mass ML of the welding means 6 which is located in the angle 5 is adjusted such that the mass ML to a mass MF of the first section 7 and the second section 8 of the first metal sheet 2 and the second metal sheet 3 are in an approximately constant ratio despite the thickness DF of metal foil being selected. The mass MF of sections 7, 8 is produced by the addition of respective individual masses of the first section 7 and the second section 8. These in turn result from the respective metal sheet thicknesses DF and a length LA of the section that it comes into contact with the welding medium. The length of the actual joint meeting of the two metal sheets 2, 3 is also put into the calculation. This approximately constant ratio is also obtained approximately when the first metal sheet 2 has a thickness DF of metal sheet different from that of the second metal sheet 3.. Figure 2 shows the dependence between the mass ML of the welding medium of the welding medium at a connection point depending on the thickness DF of the selected metal sheet. With this, the approximately linear dependence already described above results in metallic sheet thicknesses less than 0.05 mm. Not only the constant MF / ML ratio, but also the gradient of? ML /? DF is approximately linear for a connection. Durable metal sheet. This makes it possible, when selecting different thicknesses of metal foil, to be always able to extrapolate or interpolate the appropriate mass of the ML welding medium, in an immediate manner, particularly, the durable metal leaf connections in honeycomb bodies have result of the following pairs of values (DF [micrometers]; ML [10-4 grams]) as clearly shown in Figure 2: (50; 5.5), (40; 4.4), (30; 3.3.), 25; 2.8) .. If the mass of the welding medium ML for the thickness DF 'of metal sheet described is within these values, naturally with a corresponding higher or lower variation of approximately 10%, depending on the composition of the material and the welding method, cell burns and deformation of the cell that occur otherwise with normal welding application are prevented. Figure 3 shows an additional metal leaf connection 9. In angle 5, a fraction 10 of particles of the welding medium, normal according to the prior art, is applied. The angle 5 is completely closed at its edge 11 due to the use of this normal fraction of particles of the welding medium. This means that between the first metal sheet 2 and the second metal sheet 3 there is a coherent, completely joined, joint accumulation of the welding means 6 which takes the form of a wedge between the metal sheets 2, 3. Another metal sheet connection , as shown later in Fig. 4 after welding, differs from it. Figure 4 shows a different metal leaf connection 12 of a first metal sheet 2 and a second metal sheet 3. The welding means 6 is applied to these two metal sheets 2, 3 in the form of a first layer 13 in the first metal sheet 2, and a second layer 14 in the second metal sheet 3. This is done by using a modified fraction of particles of the welding medium, different from the normal fraction of particles of the welding means described hereinabove in the description general. At least due to the small amount of the welding means in the metal foil connection 12 'compared to the metal foil connection 9 of Figure 3, it does not exist, due to the smaller thickness of foil DF, in particular of 0.03 and less, danger of the welding medium diffusing through the metal sheets 2, 3 or respectively, during the welding conduction to a division of the edges, in particular with a honeycomb body geometry. Figure 5 shows the relationship between the selection of a suitable fraction of welding medium particles, shown on the axis of the Y, and the selected metal sheet thickness DF, shown on the X axis. For a metal sheet thickness DF of 50 microns, a fraction of solder particles is used, the smallest particle diameter of the solder means of which is greater than 25 microns, and the largest particle diameter of the solder means of which is smaller of 106 micrometers. As the metallic sheet thickness DF • decreases, the fraction of particles of welding medium is now adjusted such that the largest maximum particle diameter of the welding medium is continuously reduced, and in contrast, the smallest possible particle diameter of the Welding medium is increased continuously. This produces the result that, from a certain thickness DF of metal foil forward, only the particle diameters of the welding medium that are greater than the actual thickness DF of metal foil are present. The maximum value of the Gaussian distribution in this way does not tend downwards, towards smaller weld medium diameters, which decrease the metallic sheet thicknesses. Rather, this remains in the form of a bell and proceeds only in the edge areas even more narrowly towards the maximum value located in the center. This relation is shown somewhat differently in Figure 5. The particle fractions of the welding medium are combined according to a linear equation along the maximum value of the particle diameter of the welding medium of the particle fraction of the solder. individual welding means, this rule for adjustment for the particle fraction of the welding means is described below with reference to the following drawings: Figure 6 shows a rule for adjustment, in order to be able to make durable metal foil connections with metal foil thicknesses of less than 50 micrometers, in particular in which these will be metal sheet connections of honeycomb bodies for exhaust gas catalytic converters that they undergo both thermal and mechanical stresses. On the axis of the Y, the mass of the welding medium ML per connection of sheet metal silk in grams. This means the mass that must be found at an angle. In the axis of the Y, on the other hand, the metal sheet thickness DF is introduced. An upper limit O and a lower limit U of the mass ML is shown in the diagram. The particularly good durability of the metal foil connection has resulted when the mass of the solder means ML for the respective thickness DF of foil sheet is selected along the line Y. It should be noted in this representation that between the thickness Metallic foil DF of 20 micrometers and 30 micrometers, with an extra thickness of 25 microns metallic foil. Because of this, the curve looks more linear, particularly in the range of minus. of 30 micrometers, which would be without distortion of the axis of the X. Despite this, it can be seen from this diagram, that between 30 micrometers and 50 micrometers, there is approximately linear relationship between the mass ML and the thickness DF of metal sheet . Below 30 micrometers, the gradient of the curve flattens somewhat.

It is evident that the bandwidth of the measurable mass range is further narrowed down to the shape of a funnel towards smaller metal sheet thicknesses DF. An approximately ideal value of the selected mass ML along the Y curve becomes thus narrower at the lower limit U than at the upper limit 0. For a more complex body to be welded such as, for example, a honeycomb body, the rule for the adjustment for the method of application of the welding medium in this way is continued as much as possible along ideal values according to the curve Y, but care must be taken, however, that the lower limit does not go down. Due to the proximity of the Y curve to the lower limit U, this risk is more likely to extend to the upper limit 0. Figure 7 shows a bandwidth of particle sizes, introduced on the Y axis in micrometers, depending on the thickness DF of metallic sheet, selected, and inserted in the axis of the X. This diagram shows in an exemplary manner a bandwidth that has been found for the application of the welding medium to a honeycomb body. At a first curve 15 with full with. triangles shows the limit of the minimum particle size to be selected. A second curve 16 shows a maximum particle size to be selected depending on the thickness DF of metallic sheet1. Particularly good metal foil connections have been selected for honeycomb bodies when the smallest particle diameter of the particle fraction of the welding medium proceeds along a third curve 17 and the largest particle diameter of the fraction of particle of the welding medium along a fourth curve 18. Additionally, you can see the diagram that the upper and lower limits of the fraction of particles of the welding medium with respect to the particle size, with decreasing thicknesses Metal leaf DF come together in a tubular manner. An absolute value for the gradient of the second curve 16 and the fourth curve 18 in this manner is greater than that of the first curve 15 and the third curve 17. In particular, of a metal sheet thickness DF of 30 micrometers and less towards in front of the absolute gradient "Se the first curve 15 and the third curve 17 tends to 0. Figure 8 shows the relationship of Figure 6, where here, the mass of the welding medium ML depending on the thickness DF of The metallic sheet is represented as a quotient with respect to the metal sheet thickness DF It is evident that the quotient remains approximately constant up to a metal sheet thickness DF of 30 micrometers, while at 30 micrometers and less, the quotient ML by. DF is further increased, Figure 9 shows a schematic representation of the Gaussian distribution of the particle diameter of the welding means dependent on the metal sheet thickness DF.On the Y axis, the particle diameter d the welding means is introduced into the maximum particle diameter of the welding medium. On the X axis, the distribution percentage is displayed. It is evident that on the one hand, the maximum particle diameter of the welding medium is approximately central in the bandwidth of the fraction of particles of welding medium. Additionally, it is evident that the shape of the bell shape does not change in principle as it becomes smaller than the metal sheet thickness DF, such a small degree, does the percentage distribution of the particle fraction of the welding medium, per se. Figure 10 again shows the relationship between the amount of the medium, of welding used depending on the thickness of the metal sheet, as shown in Figure 6. In Figure "10, however, the distortion of the X-axis is removed, since it is now to regulate the distribution, the linearity of the lower limit U, upper limit O of the development I to about 20 micrometers, and then the bending somewhat, is evident from these measured values.All in all, particularly good, durable, leaf connections metal, in particular honeycomb bodies are produced when a metal foil connection with a fraction of particles of metal foil welding means and / or a method, as described respectively above, was used.

Designation list 1 metal sheet connection 2 first metal sheet 3 second metal sheet 4 connection point 5 angle 6 welding medium 7 first section 8 second section 9 additional welding sheet connection 10 normal fraction of welding medium particles 11 edge 12 metal sheet connection 13 first layer of welding medium 14 second layer of welding medium 15 first curve 16 second curve 17 third 'curve 18 fourth curve DF thickness of metal sheet 1A section length ML mass of welding medium MF mass of sheet sections U lower limit of the mass of welding medium 0 upper limit of the mass of welding medium '1 ideal value of the mass of welding medium

Claims (22)

1. CLAIMS 1. A metal sheet insertion of a first and a second metal sheet, wherein the first and second metal sheet have a thickness of less than 0.04 mm and are welded together at a connection point, where the connection forms an angle that is substantially filled with welding means, characterized in that a mass ML of the welding means, and a mass MF of these sections of the metal sheets that the welding means in the angle makes contact are a predeterminable relation, wherein the ratio of MF / ML extends from about 4 to about 8.
2. 2. A metal sheet connection of a first and a second metal sheet, wherein the first and second metal sheet have a thickness of less than 0.04 mm , and are welded together at a connection point, where the connection point by an angle that is filled by means of welding, characterized in that in the angle is located a mass of solder ML in a ratio to a metal sheet thickness DF of about ML / DF = 8 g / m to 16 g / m. The metal foil connection according to claim 2, characterized in that a metal sheet thickness DF of less than 0.04 mm to about 0.03 mm or less, an upper limit of the mass of the solder means ML decreases in an approximately linear fashion depending on the thickness DF of metal sheet. 4. The metal foil connection according to claim 2 or 3, characterized in that the upper limit of the welding head of the welding medium. ML in relation to the metal sheet DF is approximately ML / DF = 14.6 g / m, with a variation of + 5% and -5%. The metal foil connection according to claim 2, characterized in that a lower limit of the mass of the solder means ML decreases in an approximately linear manner depending on the thickness DF of the foil. 6. The metal sheet connection according to claim 5, characterized in that the lower limit of the mass of the solder ML relative to the thickness DF of the metal sheet is approximately ML / DF = 8.7 g / m, with a variation of + 5% and -5%. The metal foil connection according to one of the preceding claims 2 to 6, characterized in that for a metal sheet thickness DF of about 0.03 no not less, an upper limit of the mass of the solder means ML depending on the thickness DF of metallic sheet is along a curve that passes through the following points (ML / DF, DF): (14.6 g / m, 0.03 mm), (14.8 g / m, 0.025 mm), (16 g / m, 0.02 mm), (27 g / m, 0.01 mm). The metal foil connection according to one of the preceding claims 2 to 6, characterized in that for a metal sheet thickness DF of approximately 0.03 mm or less, a lower limit of the mass of the solder means ML depending on the thickness DF of metallic sheet is along a curve that passes through the following points (ML / DF; DF): (8.6 g / m; 0.03 mm), (9 g / m; 0.025 mm), (9.2 g / m; 0.02 mm), (16 g / m, 0.01 mm). The metal foil connection according to one of the preceding claims 2 to 6, characterized in that for a metal sheet thickness DF of approximately 0.03 mm or less, the mass of the solder means ML depending on the thickness DF of the foil is at along a curve that passes through the following points (ML / DF, DF): (11 g / m, 0.03 mm), (11.2 g / m, 0.025 mm), (12 g / m, 0.02 mm) , (20 g / m, 0.01 mm). The metal foil connection according to claim 2, characterized in that the ratio of the mass of the solder means ML in the angle to the metal sheet thickness DF is approximately ML / DF 0 11 g / m, with a variation of + 15% and -10%. 11. Honeycomb body of laminated metallic layers, wherein - the laminated metal layers are formed of metal sheets - which are structured at least in part -, - the metal sheet has a thickness of less than 0.04 mm, the laminated metallic layers are at least in part weld together and the welded connection points respectively have an angle that is substantially filled with welding meanscharacterized in that the body of the metal has a metal wire connection according to one of claims 1 to 10. 12. A fraction of particles of metal foil welding means for the fabrication of a welded connection between a first and a second metal sheet forming an angle in the welded connection, in particular for the fabrication of the welded connection of a honeycomb body of the metal sheet, wherein the fraction of particles of the welding means. particle between 0.001 mm and 0.2 mm, characterized in that the fraction of particles of the welding medium is composed according to the thickness of the metal sheet / Ca "" as follows:. - for a thickness of approximately 0.05 mm of particles of welding medium with a maximum diameter of 0.135 mm and a minimum diameter of 0.015 mm, - for a thickness of approximately 0.02 mm of particles of the welding medium with a maximum diameter of 0.08 mm and a minimum diameter of 0.02 mm, for a thickness of metallic sheet that is between these: with a maximum diameter and a minimum diameter of particles, of the half solder, which results in an approximately linear way the corresponding values for the thickness of the metal sheet of 0.05 mm, and 0.02 mm, and furthermore that, a maximum value of a Gaussian distribution in percent with respect to the respective portion of the diameter of the particle fraction of the welding means is arranged approximately in a manner between the maximum diameter and the "minimum diameter of the fra &ampof particles in the welding medium. The particle fraction of the metal foil welding medium according to claim 12, characterized in that the Gaussian distribution remains approximately constant when the thickness of the metal foil is reduced from 0.05 mm to 0.02 mm. A particle portion of the metal foil welding means according to claim 12 or 13, characterized in that the maximum diameter of the fraction of particles of the welding medium results from the following values: - par'a 'a thickness' of about 0.05 mm of solder medium particles with a maximum diameter of 0.125 mm, in particular of 0.105 mm, for a thickness of approximately 0.02 mm of particles of the welding medium with a maximum diameter of 0.07 mm, in particular 0.063 mm, - for a thickness of the metal sheet is between this: with a maximum diameter in particles of welding medium, which results in an approximately 'linear' • the corresponding values for the thickness of the metal sheet of 0.05 mm and 0.02 mm. A particle fraction of the metal foil welding means according to claim 12, 13 and 14, characterized in that the minimum diameter of the particle fraction of the welding medium results in the following values: - for a thickness of approximately 0.05 mm of the particles of the welding medium with a minimum diameter of 0.018 mm, in particular of 0.023 mm, for a thickness of approximately 0.02 mm of the particles of the welding medium with a minimum diameter of 0.03 mm or less, in particular 0.035 mm, for a thickness of the metallic sheet that is between these: with a maximum diameter of the particles of the welding medium, which result in an approximately linear manner of the corresponding values for the thickness of the metallic sheet of

   0. 05 mm and 0.02 mm. 16. The particle fraction of the metal foil welding medium according to one of claims 12 to 15, characterized in that, with a metal foil thickness of 0.03 mm or less, the minimum diameter of the particles of the welding medium is approximately 0.03 mm or less, in particular 0.035 mm. 17. Method for making a metal sheet connection of a first and a second metal sheet by means of a fraction of particles of the metal foil welding medium, wherein the first and second metal foils have a thickness of less than 0.05. mm, - where the two metal sheets are welded together at a connection point, and the connection point forms an angle, - where the first and second metal sheet are glued, before they are in contact with the particle fraction of the metal foil welding means, characterized in that the particle fraction of the metal foil welding means is adjusted such that a particle fraction of the foil welding medium according to one of claims 12 to 16 is obtained. 18. Method for making a metal sheet connection of a first and a second metal sheet by means of a particle fraction of the metal foil welding means, in where the first and the second metal sheet have a thickness of less than 0.05 mm, wherein the two metal sheets are welded together at a connection point and the connection point forms an angle, - where the first and the second sheet metal are stuck together, before they come into contact with the particle fraction of the metal foil welding means, characterized in that the first and second metal foils are brought into contact in a first step with a first fraction of particles of the foil. metal sheet metal welding means, and subsequently the metal sheets are contacted again in a second step with a particle fraction of the metal foil welding means, wherein the metal foils are used with a thickness of 0.03 mm or less. The method according to claim 18, characterized in that the first fraction of particles of the metal foil welding means is selected such that it has a larger maximum diameter and a smaller minimum diameter of the particles of the welding medium than a second fraction of particles of the metal foil welding medium used in the second step. The method according to claim 18 or 19, characterized in that the first step, the first fraction of particles of the metal foil welding medium according to one of claims 12 and 16, is used. The method according to claims 18, 19 or 20, characterized in that the second step, the second fraction of particles of the metal foil welding means is selected such that the maximum diameter of the particles of the welding medium is less than 0.07. mm of the maximum diameter of the particles of the welding medium is greater than 0.045 mm. 22. The method according to claim 17 to 21 for the application of a welded connection.