WO2004042420A2

WO2004042420A2 - Arrangement for the soldering of a metal block with a number of jointing segment sheets with fixing elements as support for soldering material

Info

Publication number: WO2004042420A2
Application number: PCT/EP2003/012208
Authority: WO
Inventors: Hans Hartmann
Original assignee: Hartmann, Helga
Priority date: 2002-11-05
Filing date: 2003-11-03
Publication date: 2004-05-21
Also published as: AU2003298101A8; WO2004042420A3; EP1560674A2; AU2003298101A1; DE10351541A1

Abstract

The invention relates to an arrangement for the soldering of a metal block (12) by the jointing of a number of segment sheets (12/i), whereby solder material (18) forms a whole-surface material connection with low layer thickness in capillary soldering gaps (14/j). In order to fix the segment sheets (12/i) in base form with the configuration for the permanent connection by soldering, rod-like fixing elements (15/1 to 15/4) are provided, passing through adjacent segment sheets (12/i), through openings which open out into each other and hold the segment sheets together in the given arrangement by means of the positive fit thereof. The solder material (18) is prepared in deposit chambers, connected to the solder gaps. The fixing elements (15/1 to 15/4) serve as carrier for solder material (18), applied to the fixing element such that, with the segment sheets (12/i) and the fixing elements in the pre-fixing configuration, the solder material is maintained in frictional contact with the opening edge regions of the segment sheet openings to both sides of the solder gaps traversed by the fixing elements.

Description

Arrangement for soldering a metal block that can be joined from a number of segment sheets

description

The invention relates to an arrangement for soldering a metal block that can be joined from a number of segment sheets, in which solder material in capillary-soldering gaps formed between adjacent segment sheets conveys a full-surface, cohesive connection of a small layer thickness, with the segment sheets being pre-fixed in one that can be achieved by soldering , firmly configured configuration of the basic shape according to rod-shaped fixing elements are provided, which pass through mutually aligned openings of mutually adjacent segment sheets, and by positive engagement with the opening edges, the segment sheets are kept in the arrangement provided, and the solder material is provided in depot spaces which correspond to the Soldering gaps are communicating.

An arrangement of this type is known from WO 01/02119 A1.

In a typical arrangement of the known type, the segment sheets each have the same, e.g. B. rectangular contour and are arranged for soldering in a stack, in which the large-area boundary surfaces of the stacked segment sheets run horizontally and the narrow, contour contour marking end faces on the longitudinal and transverse sides of the - generally cuboid - stack are coplanar. In order to be able to fix the segment sheets before soldering in the configuration provided for the finished metal block, the segment sheets are provided with circular recesses of the same diameter, in the congruent arrangement of which the stack penetrating, "vertical" channels are given, in which, for. B. round rod-shaped fixing elements can be used, which by their positive engagement with the knurled convey the openings of the stacked segment sheets their correct pre-fixation with each other. In this case, it may be sufficient if two such channels and fixing elements are present in order to achieve the defined arrangement of the segment sheets with respect to one another.

The solder material is inserted into depot spaces, which in turn are formed by recesses arranged in alignment with one another or next to or above one another, the volume of such solder depot spaces being significantly larger than the volume of the inserted solder material, so that when it melts, it can collect as it were in a lower region of the receiving channel. In these depot spaces, capillary solder inflow paths are formed by inserted profile pieces, via which the molten solder material - by capillary action - can ascend and enter the soldering gaps arranged one above the other, whereby these soldering gaps, due to their capillary action, remove the liquid from the "vertical" capillary supply path Pull off the solder material that is required for the extensive wetting and connection of the segment sheet metal surfaces delimiting the respective soldering gaps.

In the known way of supplying the solder material to the soldering gaps which are delimited over a large area, the solder depot spaces must be closed "downwards" so that melted solder material cannot run out. The solder is picked up serially in the individual soldering gaps, one above the other, in such a way that the lowest soldering gap first draws in the solder and only then does the soldering gap above it gradually take up the molten solder.

As a result, the soldering process. especially when a large number of segment sheets have to be soldered to one another, can take a very long time, which increases with the number of segment sheets. Since lower soldering gaps are in "take-over" contact with the supply solder path longer than higher-lying soldering gaps, it can also occur in the lower-lying area of the metal block that solder emerges from the soldering gaps again after they have been completely filled with solder and at least partially leads to external wetting of the metal block, ie in the area of the narrow edge end faces of the segment sheets. In order to compensate for the consumption of solder material associated with this and to ensure that full-area soldering can be carried out in all soldering gaps, considerably more soldering material must be introduced into the soldering depots than would be necessary solely for soldering the soldering gaps with a large area.

The object of the invention is therefore to improve an arrangement of the type mentioned at the outset such that on the one hand the time required for the soldering process and on the other hand the consumption of solder material can be significantly reduced.

This object is achieved by the characterizing features of claim 1.

According to this, the - rod-shaped - fixing elements are used as a carrier for solder material, which is applied as a coating on the fixing elements. The segment sheets and the fixing elements are matched to one another in such a way that in the pre-fixing configuration of the block, in which the fixing elements pass through the aligned openings of the segment sheets, the solder material coating is held non-positively on both sides of the respective solder gap that has been crossed, in contact with the opening edges of the segment sheet openings, as a result of which on the one hand the segment sheets are fixed to each other and on the other hand solder material is arranged directly adjacent to the edges of the solder gap. As a result, the arrangement according to the invention provides the advantage that As soon as it melts, solder material is immediately taken up by the nearest soldering gap and, as a result, is drawn into the gap by its capillary action, which takes place practically simultaneously - "in parallel" - with all soldering gaps, with the result that the soldering process takes place within the shortest possible time , namely about that which corresponds essentially to the time required for the formation of the soldered connection in the area of a single soldering gap. With the arrangement according to the invention, a good, uniform quality of the soldered connections is also achieved, and a comparatively small excess of solder material is sufficient to guarantee the full area of the soldered connection.

The type of coating of the pre-fixing elements by electroplating provided in accordance with claim 2 is particularly suitable if suitable metals such as copper or silver are used as brazing material for brazing.

The type of coating of the pre-fixing elements provided by immersion in molten solder material can be carried out in a simple manner with conventional soft solder material.

The features of claims 4 to 9 indicate, alternatively or in combination, usable design variants of pre-fixing elements which are suitable as supports for solder material in the arrangement according to the invention.

The features of claim 10 are, according to the basic structure, outlines arrangements with flat-plate-shaped prefixing elements that allow a well-dosed solder metering to the individual soldering gaps of an adding metal block, with the features of claims 11 and 12 alternative or design of Lot-Depot compartments that can be used in combination is also specified. The features of claims 13 to 17 provide simple implementable designs of clamping elements of such plate-shaped fixing elements, which in turn can be used alternatively or in any combination. In this case, it can be expedient both in the case of hump-shaped and also in the case of rib-shaped fixing elements which extend in the insertion direction if such elements, viewed transversely to the insertion direction, are arranged at a lateral distance from one another. Here, rib-shaped clamping elements can only extend over partial lengths of the entire insertion path that overlap in individual directions, and bump-shaped clamping elements can be arranged distributed over different lengths of the insertion path. An expedient possibility of realizing clamping elements can also consist in that, with increasing insertion distance, clamping elements with increasing thickness come into engagement with the wheels of the receiving channels of the metal block.

Using assemblies according to the invention by brazing or soft soldering, metal blocks in the area of external mouth openings of channels which are formed by openings or gaps in cross-section overlap which are arranged adjacent to one another in many cases often require - in particular machining - post-processing, e.g. B. drilling a channel section or cutting a thread, d. H. supplementary processing required for their intended use. If a metal block manufactured in multi-layer soldering technology is provided "inside" with a multi-branched channel system, care must generally be taken to ensure that chips resulting from post-processing do not get inside the metal block and through it into connected devices and there can cause damage.

In order to temporarily close the external openings of such a metal block for this purpose - for the purpose of reworking the same - To be able to eat, it is provided in the embodiment of the invention according to claim 18 that the channels of the block, the mouth openings of which are arranged on the outer boundary surfaces thereof, each at a distance from the edge of the mouth opening with a ring-shaped or angularly closed, are provided with a flat surface marking edge step, which is formed by a flat boundary surface of a segment sheet made of magnetically soft material of the block, so that the inside of the block can be blocked against the outer mouth opening by placing a magnet or a closure disk equipped with at least one permanent magnet, that chips cannot get inside the block, the distance of the inner edge of the channels from the plane of the mouth openings being significantly greater than the largest, that is, at least by the depth of processing that takes place in the edge region of the mouth opening from the edge step, measured thickness of said closure disc, which can be non-positively fixed to the ring-shaped or frame-shaped support area by magnetic action.

It goes without saying that the sealing disk and the ring step of the block bearing it do not necessarily have to have flat contact surfaces, but that the contact surface on the block side and the sealing disk side only have to be complementary and can be shaped in any other way.

If, as provided in accordance with claim 19, the segment sheet forming the edge step, consisting of magnetizable material, for magnetically non-positive support and fixing of the closure disk from the edge step has radially inward-pointing support projections, it is easy to securely support and fix the closure - Reach disk or permanent magnet without drastically reducing the flow cross-section for liquid or gaseous medium flowing through the closed channel. In a design of the closure disk which is suitable for the closure of channels and which has a relatively large clear cross section, it consists of a carrier plate made of non-magnetic material and permanent magnets inserted in recesses thereof, which are preferably arranged in the outer edge region of the disk and located on the Support segment sheet made of magnetically soft material, which forms the edge step within the block channel.

If, according to the features of claim 20, the sealing disk can be supported on the edge step via a sealing ring or can be supported on a clear diameter which is larger with this concentric ring surface, it is ensured that cooling liquid which is used during machining of the block to protect the machining tool is used, can not get inside the block.

The joining of a uniform metal block by soldering together a multilayered segment sheet stack allows the implementation of very complex interiors of such a metal block, which as a rule must not be contaminated with production-related impurities. It must be avoided that z. B. when drilling a metal hole through the bearing hole for shavings resulting chips can get into the interior of the block, from which they can practically no longer be removed due to its complicated design, but migrate in the block and in the area under the influence of, for example, flowing lubricating oil the bearings can cause damage. In order to do justice to this problem, an arrangement for temporarily closing a transition opening, via which an inner channel of a metal block made of multi-layer composite technology, which consists of a large number of soldered segment sheets, merges into a continuous connecting channel of the block, which after the Joining process must be subjected to machining, provided that, realized by design tings of the individual segment sheets, the transition opening is arranged in an annular groove-shaped radial extension of the connecting channel, which is formed by recesses of segment sheets, which consist of magnetically soft - magnetizable - material, the transition opening (s) within a flat or smooth Curved cylindrical boundary surface of the radial extensions of the block is arranged, on which a permanent-magnetic film can be fixed non-positively to cover the opening. Such a magnetic film can be used in a simple manner during the finishing to close the channel to be machined against other parts of the block interior communicating with it.

Through the "magnetic" arrangements for the temporary closure of

Block openings can make tedious cleaning processes and / or complicated designs, which are to make cleaning easier, unnecessary.

The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing. Show it:

1 is a schematically simplified, perspective representation of a segment plate stack comprising several segment plates, held together by pre-fixing elements in a defined configuration,

2a shows an exemplary embodiment of a round rod-shaped fixing element with notch ribs running in the longitudinal direction and solder material deposits arranged between them, in cross section to the central longitudinal axis of the fixing element,

2b a fixing element designed as a spring pin in a sectional view corresponding to FIG. 2a, 2c is a partial view of the fixing element according to FIG. 2b, seen in the direction of arrow IIc of FIG. 2b,

2d shows a fixing element which comprises two flat wedges which can be driven into slots of the segment sheets of the stack which are aligned with one another, in the clamping position conveying the fixing, on average along the common central plane of the wedges and the slots,

2e the flat wedges of the fixing element according to FIG. 2d as a prefabricated, assembly-facilitating unit, in a sectional view corresponding to FIG. 2d,

2f is a view of the fixing element according to FIGS. 2d and 2e, seen in the direction of arrow IIf of FIG. 2d,

2g a fixing element analogous to the fixing element according to FIGS. 2d and 2e, which comprises three flat wedges, in a representation corresponding to FIG. 2d,

2h, the fixing element according to FIG. 2g, seen in the direction of the arrow IIh of FIG. 2g,

2i a three-part fixing element analogous to the fixing element according to FIGS. 2g and 2h in a view representation corresponding to FIG. 2g,

2j shows a resilient fixing element designed as a C-profile in section along a plane running parallel to the soldering plates, 2k a fixing element formed from a spring-elastic, corrugated sheet-shaped profile bar in a sectional view corresponding to FIG. 2j,

21 a flat-plate-shaped, rectangular fixing element with the soldering gaps individually assigned soldering depots and with spring-driving clamping elements,

2m to 2 p details of special designs of clamping elements of the fixing elements according to FIG. 21 in a representation corresponding to this,

2q is a view of a flat-plate-shaped fixing element arranged on the outside of a metal block according to FIG. 1, which is used to delimit solder deposit compartments, which are otherwise bordered by recesses in segment sheets,

2r, the fixing element according to FIG. 2q in section along the line, llr + Mr FIG. 2q,

2s details of the arrangement and design of clamping elements of the fixing element according to FIGS. 2q and 2r,

3a shows a first exemplary embodiment of an arrangement for temporarily closing an outer mouth opening of a functional channel of a metal block according to FIG. 1 by means of a permanent magnet as a closure disk,

3b shows the arrangement of FIG. 3a, seen in the direction of arrow IIIb of FIG. 3a, 3c shows another embodiment of an arrangement analogous to the arrangement according to FIGS. 3a and 3b for comparatively larger opening cross-sections, in a representation corresponding to FIG. 3a,

3d shows the arrangement according to FIG. 3c, seen in the direction of the arrow llld of FIG. 3c,

3e shows a modification of the arrangement according to FIG. 3a in a representation corresponding to this,

3f to 3h further arrangements analogous to the arrangement example according to FIGS. 3a and 3b in corresponding representations,

4a shows an arrangement for temporarily closing the transition opening, via which a transverse channel connects a metal block to a cross-section which is round in diameter by means of a flexible magnetic tape and

4b the arrangement according to FIG. 4a in section along the line IVb - IVb of FIG. 4a.

The arrangement designated overall by 10 in FIG. 1 is intended to be soldered in a stack 11 of plate-shaped segment plates 12 / i (i = 1 to N) arranged one above the other to form a uniform, solid, as it were "one-piece" metal block 12 outer shape corresponds essentially to that of the plate stack 11.

For the metal block 12, without restricting the generality, ie only for the purpose of explanation, it is assumed that it serves as the housing block of a device within which cross-sectional Lapping standing, not shown recesses of the segment sheets 12 / i to 12 / N cavities and / or channels are formed, which either serve as receptacles or as connecting channels for other machine or device elements. Openings of the metal block 12 which are indicated schematically in this regard are designated by 13/1 to 13/4.

For the arrangement example chosen for the explanation, it is assumed that the segment sheets 12 / i have a rectangular border, with edge lengths of a few centimeters and a thickness between two and five millimeters, and that they adjoin one another to form the overall cuboid-shaped stack with the large area areas 11 are placed on top of each other. In order to achieve the highest possible strength of the "one-piece" metal block 12 to be created by the soldering process, it is necessary to solder the soldering gaps 14 / j (j = 1) to (N.) Bordered between the segment sheets 12 / i by their large boundary surfaces -1) to be filled completely with solder.

These soldering gaps 14/1 to 14 / N-1, when the segment sheets 12/1 to 12 / N are still loosely stacked on top of one another, have a sufficient vertical "clear width" for each other due to the only point-shaped arrangement that liquid Lot can evenly distribute solder within this column due to the capillary action, even when the segment sheets are pressed together, e.g. B. by a placed on the top segment sheet 12/1, not shown weight.

In order to achieve a pre-fixation of the segment sheet stack 11 in the configuration that corresponds to the finished metal block 12 after soldering, fixation elements 15/1 to 15/6 are provided, which by a positive engagement with channels 16/1 to 16 / 4 of the segment sheet stack 11, which are formed by mutually aligned recesses of the segment sheets 12 / i, convey their reliable fixation in the configuration required for the soldering process. These fixing elements, for the explanations of which reference is now also made to the illustrations in FIGS. 2a to 2c, are also used as carriers for soldering material 18, so that solder deposits are also created when the plate stack 11 is pre-fixed by means of the fixing elements 15/1 to 15/4 , in which the solder material 18 is provided, which is required for the large-area soldering of the segment sheets 12/1 to 12 / N.

1 arranged in the front part of the segment sheet stack 11 is designed as a grooved pin, which has a round rod-shaped core 19, radially projecting from the grooved ribs 21 in a substantially triangular cross section, the notched edges 22 parallel to the Central longitudinal axis 23 of the notch pin 15/1 run (Fig. 2a). In the special exemplary embodiment chosen for explanation, eight notch ribs 21 are provided, which, viewed in the direction of the central longitudinal axis of the notch pin 15/1, are arranged azimuthally at angular intervals of 45 ° in each case. They are dimensioned such that the envelope 24 of their notch edges 22 is a cylindrical surface, the diameter of which is slightly larger than the diameter of the circular segment sheet openings 26, which in their entirety form the channel 16/1, into which the fixing element 15/1 can be driven is. Furthermore, the notch ribs 21 are designed in such a way that their base width, measured in angular degrees, corresponds to the angular spacing of the base edges 27 of notch ribs 21 which are adjacent azimuthally and run in the cylindrical lateral surface of the notch pin core 19. Between the respective notch ribs 21, the notch pin 15/1 is coated with an externally cylindrical layer of solder material 18, the outer diameter of which corresponds essentially to the diameter of the segment sheet openings 26 which form the insertion channel 16/1 for the notch pin 15/1. The notch pin 15/1 is expediently provided with a short conical centering chamfer at its insertion end. With this design of the fixing element 15/1, as soon as the solder material 18 melts, all soldering gaps 14/1 to 14 / N-1 are evenly supplied with solder. The "rear" fixing element 15/3, which is arranged diametrically opposite the fixing element 15/1 explained, is largely functionally analogous, in which functionally corresponding ribs 21 are designed in the manner of thread turns of a screw. A screw bolt can also be used as a fixing element, in the thread of which wire-shaped solder material is inserted, so that when the screw is pressed into its channel 16/3 within the threads of the screw it can be compressed to such an extent that it lies flat against the recessed edges of the segment sheets.

A functionally analogous, not specifically shown, modification of a fixing element essentially in the form of a round bar can consist in the fact that a cylindrical bolt is provided with coaxial grooves distributed discretely over its length, into which solder material rings are inserted, which when the bolt is inserted into the aligned openings of the rod 12 are slightly compressed and thereby impart the non-positive pre-fixation of the rod.

1 in the left corner area of the segmented sheet metal stack 11 and in detail in FIG. 2b, the fixing element 15/2 is designed as a spring pin which has a relatively thick-walled, cylindrical spring steel jacket 29 provided with a longitudinal slot 28, whose outer diameter in the relaxed state of the spring pin 15/2 corresponds to the diameter of the aligned - circular - segment sheet metal openings 26 which form the insertion channel 16/2 for this fixing element 15/2. A layer of solder material 18 is applied to the fixing element 15/2 at least on the outside, so that its outside diameter, as long as it is in the relaxed state, is twice the layer thickness of the solder material 18 is larger than the diameter of the segment sheet metal recesses which form the insertion channel 16/2 for the fixing element 15/2.

The fixing element 15/2 is provided with a centering chamfer 31, which facilitates insertion into the insertion channel 16/2.

When the fixing element 15/2 is inserted into the channel 16/2, its spring steel jacket 29 is under a prestress, which is accompanied by a tendency for the fixing element 15/2 to expand radially. As a result, the solder material 18, even if the pretension of the spring pin 16/2 is drastically reduced at the soldering temperature, is nevertheless reliably pressed against the channel boundary and can easily be drawn into the soldering gap 14 / j.

At least in the case of using a "hollow" spring steel pin 15/2 as a fixing element, it is expedient in the arrangement shown if the channel 16/2, into which the spring pin 15/2 can be inserted, can be closed on its lower opening side, which is simple by means of a designed, not specifically shown plug is easily possible, which in turn is soldered into the channel after the soldering process.

This also applies mutatis mutandis to the use of the variants of resilient fixing elements 15/5 or 15/6 shown in FIGS. 2j and 2k, which are intended for insertion into channels 16/5 with a flat, rectangular, light cross-section (FIG. 21 ).

The fixing element 15/5 according to the sectional view of FIG. 2j is designed in the basic form as a C-profile that, seen in the state plugged into the channel 16/5, is formed symmetrically with respect to the channel transverse center plane 66, which is perpendicular to the wider one , Opposite channel boundary surfaces 67/1 and 67/2. In this inserted state of the fixing element 15/5, this is under tension, with its relatively wide central leg 68/1 on a broad channel boundary surface 67/1 and with and with linear contact of its strongly curved “transverse leg” 69 with a relatively large area / 1 and 69/2 on the narrow transverse boundary walls 71/1 and 71/2 of the receiving channel 16/5, which, as can be seen in the illustration in FIG. 21, is formed by a multiplicity of rectangular recesses in the segment sheets.

The transverse profile legs 69/1 and 69/2 of the fixing element 16/5 connect with a smooth curvature to the middle leg 68/1 of the fixing element 15/5.

In the relaxed state of the fixing element 15/5, its center leg 68/1 also has a flat curvature, the curvature rate of which is significantly e.g. is ten times larger than the radius of curvature of the C-profile legs 69/1 and 69/2 arranged opposite one another.

The solder material layer 18 is applied to the “outer” convex side of the resilient profile core 19.

The radius of curvature of the profile legs 69/1 and 69/2 of the fixing element 15/5 arranged opposite one another, measured for the outer surface of the solder material layer 18, corresponds essentially to half the value of that between the wide channel boundary surfaces 67/1 and 67/2 of the “rectangular” block channel 16 / 5 measured clear width w of the same.

The fixing element 15/5 according to FIG. 2j is dimensioned such that its strongly curved legs 69/1 and 69/2 each span an arc of approximately 180 °, so that in the area of the free edges of the strongly curved profile legs 69/1 and 69 / 2 these are tangential to the other Fit the wide channel boundary surface 67/2 facing away from the telshank 68/1.

This shape of the fixing element 15/5 in connection with the design of the receiving channel 16/5 achieves a precise, force-fitting pre-fixing of the segment sheets 12 / i of the segment sheet stack 11.

The same applies mutatis mutandis to the fixing element 15/6 shown in FIG. 2k, which is largely functionally analogous with the fixing element 15/5 according to FIG. 2j, which, again seen in the cross-sectional representation, is designed in the manner of a corrugated sheet that the shown fixation configuration, under tension, with line-shaped contact on the wide transverse boundary surfaces 67/1 and 67/2, as well as the narrow transverse boundary walls 71/1 and 71/2 of the respective plug-in channel 16/5, and thus the required force fit again Fixation of the segment sheets of the stack 11 in their intended position for the soldering together to form a uniform metal block.

2k, the fixing element 15/6 has smooth, cylindrical-sector-shaped edge sections 72 / I and 72 / r on both sides of a sine-wave-shaped central area, each of which connects smoothly to the wave-shaped central area 72 ,

The design provided for the fixing element 15/6 according to FIG. 2k results in an overall symmetrical configuration with respect to the central axis 73 of the insertion channel 16/5 and thus also of the fixing element 15/6, in which the fixing element 15/6 in the two widths Bounding walls 67/1 and 67/2 of the insertion channel 16/5 each three times and the narrow transverse walls 71/1 and 71/2 of the insertion channel 16/5 touched once in a line. The elastic core 19 of the fixing element 15/6 is coated on both sides with solder material coatings 18/1 and 18/2.

It goes without saying that a fixing element 15/6 of the type described with reference to FIG. 2k also realizes with a different number of wave “mountains” and “valleys” and thus in a redesign that is symmetrical with respect to the transverse central plane 66 of the insertion channel 16/5 can be.

As an alternative or in addition to essentially round-rod-shaped fixing elements 15/1 to 15/3, as explained with reference to FIGS. 2a to 2c, or the C-profile rod or corrugated fixing elements 15/5 or 15/6, as with reference to FIG 2j and 2k, fixing elements 15/4 consisting of flat material parts can also be used, as shown schematically in the right corner region of the segment plate stack 11 (of FIG. 1) and more in detail in the sectional representations of FIGS. 2d to 2i.

The fixing element 15/4 according to FIGS. 2d and 2e comprises a pair of flat wedges 32/1 and 32/2, which each have the same wedge angle α. The two flat wedges 32/1 and 32/2, as seen in the sectional representations of FIGS. 2d and 2e, each have the shape of a right-angled trapezoid, in which the length b of the trapezoidal leg extending at right angles to the two base edges a and c of the total thickness of the segment sheet metal stack 11 equivalent. The thickness d measured between the "large" trapezoidal side surfaces of the flat wedges 32/1 and 32/2 corresponds to the clear width of elongated rectangular slots 33 of the segment sheets 12 / i. These slots are aligned with one another so that they form a rectangular channel 34 passing through the stack 11, in which the two flat wedges 32/1 and 32/2 can be used in the arrangement shown in FIG. 2d, in which the two flat wedges 32 / 1 and 32/2 rest with their oblique legs and are supported with their legs running at right angles to the base edges on the narrow boundary surfaces 36 and 37 of the rectangular slots of the segment sheets 12/1 to 12 / N. The length I of the slots 33 of the segment sheets 12 / i is slightly less than the sum of the lengths a and c of the base edges of the trapezoidal wedge surfaces.

As shown in FIG. 2d, the flat wedges 32/1 and 32/2 are each provided along a row of solder deposit compartments 38/1 and 38/2 arranged at a vertical distance from one another, each of which has one of the soldering gaps 14/1 to 14/9 are assigned such that molten solder can be drawn directly into the assigned soldering gap from each of the solder depot compartments 38/1 and 38/2. In the exemplary embodiment chosen for explanation, the solder depot compartments have the shape of a square, the lower edge of which runs slightly below the assigned soldering gap when the flat wedges 32/1 and 32/2 are in the fixing configuration (FIG. 2d) are located. The division of the solder depot compartments 38/1 and 38/2 is selected such that adjacent soldering gaps 14/1 to 14/9 alternate over the solder deposits of one flat wedge 32/1 and the other flat wedge 32/2 be supplied.

The individual assignment of the solder depots 38/1 and 38/2 to one of the soldering gaps 14 / N-1 ensures that the joining takes place simultaneously in all soldering gaps.

Especially in the event that the number of solder gaps 14 / j to be supplied with solder is odd and accordingly the number of solder deposit compartments 38/1 and 38/2 of the two flat wedges 32/1 and 32/2 are differs by 1, it is expedient if the two flat wedges 32/1 and 32/2 are prefabricated in the correct pairing as a single part and are only detached from one another when they are inserted into the “clamping” channel 34 of the segment sheet metal stack 11 , For this purpose, the two flat wedges 32/1 and 32/2 in the area of their oblique leg edges 39/1 and 39/2 can be made contiguous via thin bridges 41/1 and 41/2 arranged at a distance from one another; here the two flat wedges 32/1 and 32/2 are so far offset from one another that the distance between their parallel leg edges 42/1 and 42/2 is significantly less than the distance I (FIG. 2f) of the narrow boundary surfaces 36 and 37 of the receiving channel 34 passing through the segment sheet stack 11, into which the assembly unit formed by the two flat wedges 32/1 and 32/2 can be used in the configuration shown in FIG. 2e, in which the one flat wedge 32/1 with its wider base edge a is supported on a plate 43 serving as an assembly aid and the other flat wedge 32/2 projects with its end section bordered by the wider base edge from the channel 34 of the stack 11.

When this flat wedge 32/2 is driven into the channel 34 of the stack 11, break even with low forces, e.g. by striking the outer base edge of the flat wedge 32/2, the thin bridges 41/1 and 41/2 at predetermined breaking points 44/1 and 44/2, which are arranged on the oblique leg edge 39/2 of the flat wedge to be driven 32/2 , and the flat wedge 32/2 can be driven into the channel 34 in a conventional manner until the clamping position shown in FIG. 2d of the fixing element 15/4 comprising the two flat wedges 32/1 and 32/2 is reached, in which the Solder deposit compartments 38/1 and 38/2 of the respective flat wedge 32/1 and 32/2 each assume their "supply" position crossing one of the soldering gaps 14 / j.

A fixing element analogous to the fixing element 15 'according to FIGS. 2d to 2f can also be designed symmetrically, as shown by way of example by FIG. 2g, with two flat wedges 46/1 and 46/2, which can be identical and one in between arranged isosceles-trapezoidal flat wedge 46/3. Deviating from the symmetrical design according to FIGS. 2g and 2h, the largely analogous design of fixing elements according to FIG. 2i can also be provided, in which only the flat wedges 46/1 and 46/2 with solder deposit compartments 38/1 and 38/2 are provided, each of which is individually assigned to one of the solder gaps 14 / j. The isosceles-trapezoidal flat wedge 46/3 arranged between the flat wedges 46/1 and 46/2, by means of which the fixing elements are tightened in the direction of arrow 89, is not provided with solder deposit compartments here.

The top segment plate 12/1 and the bottom segment plate 12 / N as well as adjacent inner, "middle" segment plates 12 / i and 12 / i + 1 each have slit-shaped channel openings on one side, into the one side Zones 91/1 and 91/2 of the flat wedges 46/1 and 46/2 protruding from the flat wedges 46/1 and 46/2 protrude into the channel before the central trapezoidal wedge 46/3 is driven into the channel Position shown can be brought, by which a releasable fixation of the segment sheets to each other is possible, at least in the scope of the further segment sheets 12/2 to 12 / N-1 arranged between the top and bottom segment sheets.

The flat wedges 46/1 and 46/2 can of course also be designed in such a way that their outermost protruding zones 91/1 and 91/2 respectively engage on the outer surfaces of the segment sheets 12/1 and 12 / N facing away from one another, so that all segment sheets 12 / i of the "releasable" pre-fixation are accessible.

Due to the positively defined arrangement of the flat wedges 46/1 and 46/2, a very precise assignment of the teaching Lσt depot subjects 38/1 and 38/2 to the soldering gaps 14 / j can be achieved. In the case of pre-fixing elements of the type explained with reference to FIGS. 2d to 2h, the solder deposit compartments 38/1, 38/2 of the respective flat wedge 32/1 and 32/2 or of the isosceles-trapezoidal flat wedge 46/3 are expediently punched out, punching tools being used the punched cross section corresponding to the clear cross section of the solder deposit compartments can be used.

On the same punching machine and with the same punching tools, square or rectangular parts are punched out of copper sheet as brazing material, which has the same thickness as the iron material from which the flat wedges are made, into the soldering deposit compartments 38/1 and 38 / 2 can be easily pushed in and inserted.

A combined punching and laser cutting machine is expediently used for the production, on which both the punching processes can be carried out and the trapezoidal wedges can be cut to size.

For the flat-plate-shaped fixing elements according to FIGS. 2d to 2h, constructional function analogs, guide elements made of flat material, which can be inserted into narrow receiving channels 34 (FIG. 2h) with a slit-shaped cross section, can be used, as is the case in FIG. 21, for example shown, also be designed as a "one-piece" preferably rectangular plates 74 which can be non-positively fixed in the slot-shaped channels 34 of the segment sheet stack 11 by means of simple clamping elements 76/1 to 76/3.

For the purpose of explanation, it is assumed for the fixing element 15/7 shown in FIG. 21 that it consists of a spring steel material and that the clamping elements 76/1 to / 3 are made in one piece with the plate-shaped base body of the fixing element 15/7 ,

For the design of the fixing element 15/7 and this receiving channel 34 of the plate stack 11, it is further assumed that the slot width w of the channel 34 (cf. FIG. 2i) corresponds to the thickness of the flat-plate-shaped fixing element 74 and the slot length I, ie the distance between the opposing narrow boundary surfaces 72/1 and 72 / r (cf. FIG. 2k ) of the channel 34 corresponding to the width b of the fixing element 74, in each case apart from a small guide play required for the introduction of the fixing element into the channel 34.

The arrangement of the solder depot compartments 38/1 and 38/2 within the fixing element 15/7 corresponds to that of the fixing element 15/4 according to FIGS. 2f and 2d in its soldering configuration shown in FIG. 2d, so that in this respect to the relevant parts of the description can be referred.

Suitable clamping elements can be formed in the designs shown in the detailed representations of FIGS. 2m to 2r as elastically or plastically deformable tongues (FIGS. 2m and 2o) or bridges (FIG. 2g), which are inserted into the respective stacking channel 34 are deformed into the clamping configuration shown in FIGS. 2n, 2p or 2r.

The tongue-shaped clamping element according to FIGS. 2m and 2n can be produced from a common steel material, for example, in a simple manner by punching out a narrow longitudinal slot 77 and a narrow cross section 78 from the steel plate of a fixing element 15/7, so that a overall L-shaped, one-sided edge-open slot 77, 78 results, which is bordered on the outside by the tongue 76/1, which is impressed by bending outward, a permanent deformation, shown in Fig. 2m, the design of the fixing element 15/7 before driving into the assigned channel of the segment sheet stack 11. After the fixing element 15/7 has been driven into its receiving channel 34, the sum 76/1, standing under a minimum prestress, rests against the narrow slot delimitation wall 72 / I of the plate stack 11 and thereby brings about the frictional fixing of the fixing element 15/7. The clamping element 76/2 according to FIGS. 2o and 2p with the same function as the clamping element 76/1 according to FIGS. 2m and 2n is designed as a bridge as an external boundary of an opening 79 of the fixing element 15/7 that can be achieved by widening a punch-out Can be efficiently created in a single operation using a single stamping mold.

An expedient design of a tongue-shaped clamping element can also consist in that a clamping element 76/2 in the configuration according to FIG. 2o is cut open on a base side of the bridge, as indicated by dashed lines, so that a tongue-shaped element is created that in the insertion fixation element in the Receiving channel 34 opposes a comparatively lower resistance than the "closed" clamping element according to FIGS. 2o and 2p.

The plate-shaped, one-part or multi-part fixing elements 15/4 explained in this regard with reference to FIGS. 2d to 2p, in which solder depot compartments are provided on the fixing elements themselves, are suitable for an arrangement “inside” the plate stack 11, i , H. for use in channels 34, which have a closed rectangular clear cross section.

In order to explain fixing elements 15/8 that can be attached to the outside of the plate stack 11, reference is now made to the detailed representations of FIGS. 2q to 2s:

In the arrangement according to FIGS. 2q and 2r, the segment sheets 12 / i to be soldered to one another are arranged on narrow, outer end faces, which together form the large-area outer surfaces of the metal block 10, flat, open-edged C-grooves 34c having the same clear groove cross section, which are arranged in each other aligned arrangement of wide groove bases 81, narrow C- arranged opposite one another

Inner leg surfaces 82I and 82r as well as altogether aligned narrow inner surfaces 831 and 83r narrow, mutually facing guide profile legs 841 and 84r form the insertion elements for flat-rectangular fixing elements 15/8; the thickness d of the fixing elements 15/8 corresponds in the illustrated embodiment to the distance between the narrow inner surfaces 83I and 83r from the wide groove base surface 81 and the width b of the fixing elements 15/8 to the distance of the narrow inner leg surfaces 82I and 82r from each other, which are perpendicular connect the groove base surfaces 81, on the one hand, and to the narrow inner surfaces 83I and 83r of the guide profile legs 84I and 84r, respectively. Through the positive engagement of the fixing elements 15/8 with the C-grooves of the segment sheets 12 / i arranged in alignment with one another, their intended configuration is marked. The non-positive fixing of the fixing elements 15/8 required for pre-fixing can also be resident in one of the suitable ways already explained.

Cavities suitable for forming solder deposit compartments 38/1 and 38/2 are formed in the embodiment shown in FIGS. 2q and 2r in that the segment plates 12 / i open U-shaped recesses 86 toward the C-grooves / 1 and 86 /, which are arranged within the stack between continuous sections of the adjacent segment sheets 12 / i-1 and 12 / i + 1, so that in the illustrated embodiment, with which, with the exception of a lowermost segment sheet 12 / N, all Segment sheets 12/1 to 12 / N-1 are each provided with an open edge recess 86/1 or 86/2, resulting in two rows of such recesses 86/1 and 86/2. Of course, the arrangement shown is not mandatory, but can only be modified in a variety of ways, provided that it is ensured that each soldering gap 14 / j communicates with at least one of the solder depot compartments 38/1 and 38/2, and that Lot depot compartments in the pre-fixation configuration are sealed off from the outside by the fixation elements 15/8. Clamping elements which impart a non-positive fixing of the fixing elements 15/8 in the C-receiving grooves in the metal block are therefore expediently designed and arranged in such a way that they press the fixing elements 15/8 into contact with the groove base surface 81 of the C-grooves 34c ,

Such clamping elements can e.g. be designed as sharp-edged prism-shaped ribs 87 running in the insertion direction, as shown in the left part of the enlarged detailed illustration in FIG. 2s, or as convex, flat, domed or pointed-conical bumps 88, as shown in the right part of FIG. 2s, these being Engage the clamping elements on the thin surfaces 83I and 83r of the guide profile legs 84I and 84r. It goes without saying that the shape of the clamping elements 37 and 38, the insertion path of the fixing elements, the arrangement of the material pairs must be coordinated with one another in such a way that the secure fixing configuration can be achieved with sufficient effort.

In order to be able to machine the metal block 12 after the segment sheets 12 / i have been soldered together in the area of the outer orifices 13/1 to 13/4 of functional channels or cavities of the metal block, without metal chips arising being able to get into the complexly designed interior of the metal block. it is necessary to be able to close these openings 13/1 to 13/4 for the duration of the processing.

To explain suitable arrangements of closure elements and designs of the metal block 12 in the area of such openings, reference is first made to FIGS. 3a to 3h.

For the arrangement examples represented by the figures, it is assumed without restriction of generality that the segment sheets 12 / i of the respective metal block 12 consist of a magnetically soft iron material, and that functional channels 47, which are used for the purpose of Post-processing of the respective block z. B. can be closed by means of a milling cutter 48, which is only indicated schematically in FIG. 3a, by circular openings 51 / i arranged concentrically with respect to a central axis 49 of the segment plates 12 / i soldered to one another, the central axis 49 of the of the respective channel 47 runs perpendicular to the boundary surfaces of the segment sheet 12 / i which largely delimit the soldering gaps 14 / j. In the explanatory example according to FIGS. 3a and 3b, the circular openings 51/1 and 51/2 of the two outer segment sheets 12/1 and 12/2 have a significantly larger diameter than the “inner” openings 51/3 to 51 / i , which form an "inner" channel section which, via an annular edge step 52, adjoins the outer mouth section of the channel 47, which is formed by the two openings 51/1 and 51/2 of the outer segment sheets 12/1 and 12/2 ,

A circular disk-shaped permanent magnet can be placed on this ring stage 52 as a closure disk 53, the diameter of which approximately corresponds to the diameter of the openings 51/1 and 51/2 of the outer segment sheets 12/1 and 12/2, so that the permanent magnet on a predominant part of the ring surface of the annular channel step 52 and, hence, the attraction force holding the magnet on the step has a large amount.

The thickness of the permanent magnet 53 is selected to be significantly smaller than the depth, measured between the flat outer surface 54 of the metal block 12 to be achieved by machining and the ring step 52 of the channel 47, of the diameter-enlarged mouth region 47/1 of the channel 47, so that that the magnet 53 is not damaged by the machining and there is also still enough space for receiving chips resulting from the machining, which the magnet 53 catches as it were when the machining tool 48 is moved over the opening. As indicated schematically in the left part of FIG. 3a, if necessary, a sealing ring 56 made of a soft elastic material can be arranged between the magnet 53 and the ring step 52, which under the attractive force that forms between the magnet 53 and the ring step 52 Segment sheet 12/3 acts, as it were, deformed into an annular disk, in which there is a good seal of the mouth section 47/1 of the channel 47 against its inner section 47/2, which is smaller in diameter, so that cooling liquid supplied to the processing area does not can reach the interior of the metal block 12.

As an alternative to using a sealing ring, the magnet 53 can also be provided with a thin plastic coating for the purpose of sealing.

The arrangement example according to FIGS. 3c and 3d differs from that explained with reference to FIGS. 3a and 3b with regard to the design of the metal block 12 only in that the absolute values of the diameter of the inner channel section 47/2 and the diameter of the mouth section 47 / 1 are considerably larger, and with regard to the design of the cover disk 53/1, in that several permanent magnet 53/2, each in the form of a circular disk, are arranged axially symmetrically with respect to the disk center in the peripheral region of a circular disk made of non-magnetic material, and are firmly connected to the latter; this type of sealing disk can be adapted to any - large-area - cross sections of functional channels 47.

The arrangement example according to FIG. 3e differs from that according to FIG. 3a in that the outer mouth section of the functional channel 47 formed by the circular openings 51/1 and 51/2 has a second, outer ring step 52/2 formed thereby is that the diameter of the opening 51/1 of the outer segment sheet 12/1 is larger is the diameter of the opening 51/2 of the segment sheet 12/2 adjacent to the outer segment sheet 12/1. The circular-disc-shaped permanent magnet 53/3 received by the opening 51/2 of this first inner sheet metal segment 12/2 has a thickness which is slightly greater than the thickness of the sheet metal segment 12/2, so that in its adhesive position it correspondingly emerges from the opening 51/2 of the sheet metal segment 12/2 "upwards" protrudes slightly.

By means of a comparatively thin circular disk 57 made of magnetically soft iron material placed on the outer, circular-edged end face of the permanent magnet 53/3, which is attracted by the magnet 53/3 with high force, is between this circular disk 57 and the free ring surface 52/2 of the segment sheet 12/2, a sealing ring 58 made of flexible plastic material can be clamped, which is functionally analogous to the sealing ring 56 of the arrangement according to FIG. 3a.

The arrangement examples shown in FIGS. 3f to 3h are largely analogous to those according to FIGS. 3a and 3b in terms of structure and function. The only difference from these is the shape of the opening 13/3 of the segment sheet 12/3 on which the permanent magnet 53 forming a closure disk is axially supported.

In the design of the opening 13/3 according to FIGS. 3f and 3g, this has a basic cross-shaped internal cross-section, the free area of which corresponds to the amount of the free cross-sectional area of the inner channel section 47/2, which through the circular openings 51/4 up to 51 / n is formed.

3h, three approximately circular sector-shaped openings 13/31, 13/32 and 13/33 are provided in an axially 3-fold symmetrical arrangement are delimited from one another by radial webs 59/1, 59/2 and 59/3 which are connected in the center of the opening arrangement.

In this configuration of the metal block 12, too, the total clear cross-sectional area of the three sector-shaped openings is equal to or approximately the same as the clear cross-sectional area of the segment sheet metal openings of the inner channel section 47/2.

In the arrangement example shown in FIGS. 4a and 4b, the metal block 12 has a functional channel 47 which penetrates all the segment sheets 12 / i, the central axis 49 of which runs perpendicular to the planes of the soldering gaps 14 / j and two transverse channels 61 / opening into this channel 47 1 and 61/2, which run parallel to the solder gap levels. The functional channel 47 has between an outer mouth section 47/1, which is formed by circular recesses 51/1 and 51/2 of the two outer segment sheets 12/1 and 12/2, and an inner connecting section 47/2, which is formed by circular openings 51 / 6 to 51 / i is formed, which have the same diameter as the openings 51/1 and 51/2 of the two outer segment sheets 12/1 and 12/2, a radially widened transition section 47/3 which is formed by circular recesses 51 / 3, 51/4 and 51/5 of the segment sheets 12/3, 12/4 and 12/5 is formed, the diameter of which is larger than that of the recesses which form the mouth section 47/1 and the connecting section 47/2 of the functional channel 47 ,

The two transverse channels 61 / and 61/2 are formed by aligned slots of the "middle" segment plate 12/4, the slot cheeks 62/1 and 62/2 (Fig. 4b) are aligned in pairs. 4b, the transverse channels 61/1 and 61/2 are bordered by the mutually facing boundary surfaces of the segment sheets 12/3 and 12/5, so that there is a rectangular shape for the two transverse channels 61/1 and 61/2 their clear cross section results. The contours of the transition openings, via which the transverse channels 61/1 and 61/2 merge into the functional channel 47, lie on a smooth cylindrical surface, which through the “middle” circular openings 51/3, 51/4 and 51/5 of the segment sheets 12 / 3 to 12/5 is marked.

In order to prevent that during machining of the mouth area 47/1 of the functional channel 47, chips can get into the transverse channels 61/1 and 61/2 and further cavities of the metal block 12 connected to them, in the arrangement according to FIG. 4a and 4b, a flexible magnetic tape 63 is inserted into the radial extension area 47/3 of the functional channel 47, which in the arrangement shown in FIG. 4b adjoins the cylindrical wall boundary of the radial extension and seals the transition openings 64/1 and 64/2 tightly, this magnetic tape 63 spans an angular range that is only slightly smaller than the complete 360 ° circumferential range of the radial extension 47/3 of the functional channel 47.

Claims

claims

1. Arrangement for soldering a metal block (12) that can be joined from a number of segment sheets (12 / i), in which solder material (18) is formed in capillary soldering gaps (14 / j) formed between adjacent segment sheets, a full-surface, cohesive connection of small layer thickness mediated, rod-shaped fixing elements (15/1 to 15/4) are provided for pre-fixing the segment sheets (12 / i) in a fixed configuration of the basic shape to be achieved by soldering, which, through mutually aligned openings of adjacent segment sheets (12 / i, 12 / i + 1) passing through, as well as by their form-fitting engagement with the opening edges, holding the segment sheets to one another in the intended arrangement, and wherein the solder material (18) is provided in depot spaces which are in communication with the soldering gaps, characterized that the fixing elements (15/1) to 15/4) serve as carriers for solder material (18) and This is applied to the respective fixing element in such a way that in the pre-fixing configuration of the segment sheets (12 / i) and the fixing elements, the solder material is held non-positively on both sides of the soldering gaps crossed by the fixing elements in contact with opening edge regions of the segment sheet openings.

2. Arrangement according to claim 1, characterized in that the solder material (18) on the pre-fixing elements used as a carrier

(15/1; 15/2) is electroplated.

3. Arrangement according to claim 1, characterized in that the pre-fixing elements (15/1 to 15/4) are coated with the solder material (18) in a dipping process carried out under a vacuum or protective gas atmosphere.

4. Arrangement according to one of claims 1 to 3, characterized in that there are provided as spring pins fixing elements (15/2) which have a thick-walled cylindrical, with a longitudinal slot (28) provided spring steel jacket (29).

5. Arrangement according to one of claims 1 to 4, characterized in that fixing elements (15/1) designed as grooved pins are provided which have notch edges (22) running in the longitudinal direction, preferably parallel to their central longitudinal axis (49), the enveloping edges of which loin is a cylindrical surface whose diameter is slightly larger than the diameter of the preferably tubular block channels, which are formed by the overlapping, coaxially arranged recesses (2b) of the segment sheets (12/1), into which the fixing elements can be inserted.

6. Arrangement according to one of claims 1 to 5, characterized in that threaded bolts or rods are provided as fixing elements (15/3) in the form of screws, the gears of which are lined with solder material.

7. Arrangement according to one of claims 1 to 3, wherein for receiving fixing elements (15/5), (15/6) provided, formed by aligned segment sheet recesses receiving channels (16/5) have a polygonal clear cross section, thereby characterized in that the fixing elements (15/5), (15/6) are designed as elastic profiled bars, which at least in sections have convexly curved contact areas coated with soldering material, which are under tension on flat boundary walls (67/1) due to elastic deformation, (67/2), (71/1), (71/2) of the channels (16/5) can be supported in such a way that the segment plates (12 / i) are held in the pre-fixing configuration with a positive fit.

8. Arrangement according to claim 7, characterized in that the fixing elements (15/5), (15/6) on paired opposite boundary surfaces of the channels (16/5) supportable, convex-curved profile sections (69/1 and 69/2) ; (72 / I and 172 / r).

9. Arrangement according to claim 7 or claim 8, characterized in that the fixing elements (15/6) are designed in corrugated sheet form and can be inserted into the receiving channels (16/5) in such a way that they have an arched central section (72) on an opposite slurry - Tighten the boundary surfaces (67/1 and 67/2) and support them with cylindrical sector-shaped sections on opposite narrow boundary surfaces (71/1 and 71/2) of the insertion channels (16/5), existing under pretension (Fig 2k).

10. Arrangement for soldering a metal block (12) that can be added from a number of segment sheets (12 / i), in the solder material (18) in capillary soldering gaps (14 / j) formed between adjacent segment sheets, a full-area, material-tight connection of small layer thickness mediated, rod-shaped fixing elements (15/1 to 15 / i) are provided for pre-fixing the segment sheets (12 / i) in a firmly configured configuration of the basic shape to be achieved by soldering, which, through mutually aligned openings of mutually adjacent segment sheets ( 12 / i, 12 / i + 1) passing through, and by positive engagement with the opening edges, holding the segment sheets in the arrangement provided, and the solder material (18) being provided in depot spaces (16 / i) which communicate with the soldering gaps, in particular according to one of claims 1 to 9, characterized by the following features

a) the fixing elements are flat-plate-shaped and in channels formed by slits of segment sheets and have a design which is essentially complementary to the fixing elements and can thus be frictionally fixed in these channels;

b) the solder depot spaces are delimited in the region of the slot edges by the fixing elements and the segment sheets, these depot spaces being created by recesses in the fixing elements and / or the segment sheets;

c) due to the design and arrangement of the fixing elements and the segment sheets, each depot space is in a communicating arrangement with at least one soldering gap and at most one further soldering gap adjacent to this soldering gap.

11. The arrangement according to claim 10, characterized in that the fixing elements for receiving the soldering material have openings which can be filled with soldering material before the fixing elements are inserted into the assigned receiving channels.

12. Arrangement according to claim 10 or claim 11, characterized in that solder deposit compartments by edge open to the insertion channel, e.g. U-shaped recesses or recesses of segment sheets (12 / i) are formed, which are arranged between segment sheets, the channel-defining end faces of which are coplanar with the end faces adjacent to the recesses and cross the recesses.

13. Arrangement according to one of claims 10 to 12, characterized in that the fixing elements are provided with elastic clamping elements, which when inserting the fixing elements in their

Receiving channels undergo a deformation that leads to the fixation mediating reaction force between the plate stack and the fixing element.

14. Arrangement according to claim 13, characterized in that a resilient tongue arranged on a narrow guide end face of the fixing element is provided as the clamping element, which, obliquely to the straight guide edge of the guide element, evades into an edge recess of the fixing element when it is driven into its receiving channel ,

15. Arrangement according to claim 13 or claim 14, characterized in that as a clamping element is a starting from one of the narrow guide end faces of the fixing element, flat-convex curved bridge piece, which when driving the fixing element into its receiving channel in an outside through the bridge element limited opening of the fixing element can dodge.

16. The arrangement according to claim 13, characterized in that as a clamping element of at least one of the large-area boundary surfaces of the fixing element projecting ribs and / or bumps are provided, which penetrate into the segment plate material of the metal block (12) when the fixing element is driven into an assigned receiving channel and / or develop a reaction force mediating the positive connection with the metal block by their own deformation.

17. The arrangement according to claim 16, characterized in that rib-shaped clamping elements are provided which extend in the insertion direction of the fixing elements.

18. Arrangement for temporarily closing outer mouth openings (13/1 to 13/4) of channels (47) of a metal block, which are formed by openings (51/1) or gaps of segment sheets (12 / i) arranged adjacent to one another in cross-sectional overlap who are firmly cohesive, e.g. B. are joined by brazing to form a uniform metal block, which can be subjected to post-processing in areas near the mouth of the channels, in particular for metal blocks which are produced using arrangements according to one of Claims 1 to 17, characterized in that the channels (47) of the Blocks (12), whose mouth openings (13/1 to 13/4) are arranged on the outer boundary surfaces of the block, each at a distance from the edge of the mouth opening with an edge step (52/1 ; 52/2) are provided, which is formed by a flat boundary surface of a segment sheet made of magnetizable material of the block, and that the distance of the inner edge step of the channels from the plane of the mouth opening is significant, i. H. at least by the depth of a machining process that takes place in the edge region of the mouth opening, is greater than the greatest thickness measured from the edge step of a thickness that can be placed on the edge step

Sealing disc (53 / 53/1; 53/2; 53/3, 57), which can be non-positively fixed in the area of the edge step by means of at least one permanent magnet (53).

19. The arrangement according to claim 18, characterized in that the segment plate (12/3) forming the edge step (52) has support projections pointing radially inwards from the edge step for supporting and magnetically non-positive fixing of the closure disc (Fig. 3g).

20. The arrangement according to claim 18 or claim 19, characterized in that the closure disc (53/1) made of a non-magnetic carrier plate and at least one firmly inserted therein disc-shaped, preferably circular disc-shaped permanent magnets (13) (Fig. 3c, 3d).

21. Arrangement according to one of claims 18 to 20, characterized in that the closure disc (13; 57) via a sealing ring

(56; 58) on the edge step (52), on which their holding magnet (s) can be supported or on a clear diameter of the segment plate adjacent to the ring step (52) which is larger with this concentric ring surface (52/2) 12/2) of the metal block (12) can be supported.

22. Arrangement for temporarily closing a transition opening (64/1; 64/2) via which an inner channel (61/1; 61/2) of a metal block (12), which is made of a plurality of segment sheets (12 / i ) is merged into a channel (47) which leads to an outer mouth opening of the block, in the area of which

Block must be subjected to machining after the joining process, in particular arrangement according to one of claims 18 to 22, characterized in that the transition opening (64/1; 64/2) in an annular radial extension (51/3, 51/4, 51/5) of the channel (47) leading to the outer opening is arranged, said channel being formed by recesses of segment sheets made of magnetically soft material, the transition opening (64/1; 64/2) being located within a flat or smoothly curved one cylindrical boundary surface of the radial expansion of the block is arranged, on which a permanent-magnetic, flexible film (63) can be fixed tightly in a force-fitting manner to cover the opening.