DE1452588A1 - Process for the production of profiled bodies - Google Patents

Description

Kefrath

Dr. A. Menfzel Dipl.-Ing. W. Dahlke

Paten ta nwäHe Refrath near Cologne Frankeoforst 137

Da./Jcho.

Continental Can Company, Inc. in New 'fork, N.Y. (V. ot. Of America)

Process for the production of profile bodies

CD O (D CD JP-

This invention is directed to a method of manufacture Clay profiles with parallel ribs that form one piece with the core of the original slab and protrude at an angle from the surface of the body.

It is known to have a metal brace with several longitudinal channels ▼ see in which substances that prevent protein whitening are incorporated, the brow bulges, causing them to form a streak of larger size

Length and thinner stretches, so that thin inclusion zones with anti-swelling substance are formed as discontinuities between thin cover layers; a cap layer is then slit and bent away half of the other layer, it so as parallel Veretärkungsrippen serve · £ ine rib thus prepared is connected to a neighboring fin by the '"icke a single layer _t that is, by a metal compound half as is thick than the rolled strip and to the other hip by a connection with the full thickness of the strip, the ribs being of uniform thickness from that of the slotted cover layer and their projection width is limited by the width of the slotted layer.

In the above invention, ribs are provided which are rolled simultaneously with the output body and which have projection widths that are greater than their spacing, which are also wedge-shaped that is, they are triangular in cross-section and ensure uniform heat conduction between the base body and the surface of the rib «

The invention relates to a method of production Clay such profiles as indicated above, in that a slab with several practically parallel channels or grooves, at least on one Outside, provided and this slab is rolled with Schwelßungshindestder Subatans in the grooves, whereby the material between the Grooves are stretched out into several long thin shells, which consist of one piece with the rolled base layer, which the material of the original slab, which lies under the bottom of the groove · Each shell · has an · edge · that does not match the rolled base layer

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and the other shells, so that each shell can be bent individually at its junction with the round sheet can and thus forms a rib protruding from the above-mentioned rolled base layer, integrally connected to it

Another object of the invention is a method in which the slab is rolled with parallel grooves in directions which Form different angles to the grooves, i.e. directions forming acute angles to the grooves for some stitches and parallel to them the grooves in other stitches, whereby the material is stretched between the grooves in the transverse direction to the grooves and thereby the made shells widened and the composite thickei the Shells and the material below the bottom of the groove are reduced so that a profile is produced whose shells are extended in the same direction are and predetermined individual thicknesses and cross-sections to have·

Another object of the invention is a method for producing an integral, cohesive profile from a homogeneous one Block of material, the profile having a base layer, on the surface of which - but at least one - several parallel ribs go out · The tilts have a cross-section that follows the free tip tapers to itself

Another object is a method for producing a hollow profile with several rows of outer ribs, wherein the rows be formed by machining the slab before final rolling on the wall thickness as written on the gate

Another object is a method of making a

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Rib profile through the arrangement of intersecting grooves on the Slab before it is rolled to the desired thickness, so that some of said grooves are used to make the ribs and other grooves are used to divide the ribs into sections when the ribs be lifted off after rolling

Another subject matter is a method for making a Profile that has a base layer with channels in the lateral Are arranged at a distance and where the ribs extend both from the outer walls of the channels and from the material between the channels

Another object is a method of making a Profile with a body, the parallel and overlapping channels of which are arranged in a honeycomb pattern The outer ribs then sit on the surface of the body

Another object is a method of making a Profile with a thin base layer and with ribs that separate from each other unload opposite sides, whereby the base layer and the ribs are connected in one piece and metallurgically homogeneous

The invention is explained below with reference to the drawings and exemplary embodiments.

FIG. 1 is a side view of a slab section of FIG this invention is prepared

Pig 2 is a view after partial rolling has been carried out *

Fig. 3 is a similar view of part of the finish rolled

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■ - "" ■ -. ■ "■" - "- ■■ -" ■ "■" "■" ■■ - 5 -

FIG. K is a perspective view of a rib profile which is formed by the bending of the ribs of the strip shown in FIG.

Fig. 5 is a side view of a slab for manufacture another type of stripe

FIG. 6 is a similar view of the slab of FIG. 5 after it is partially rolled

FIG. 7 is a like view showing the strip of FIG Fig 6 after it has been completely rolled out and its ribs brought into the final position

Fig. 8 is a side view of a tube of circular cross-section from which veins extend and which is derived from the strip of Fig. 5 and 6 was made

Fig. 9 is a side view of a slab on a smaller scale. rod for a further embodiment of the invention

Fig · Io is a view on a larger scale than that of the? Ig · 9, showing a portion of a partially rolled strip of FIG comes from the slab of Figure 9

Fig. 11 is a view at right angles to that of Figs shows the formation of the transverse grooves in the strip of FIG.

FIG. 12 is a view corresponding to FIG. H, on an enlarged scale, and shows the result of further rolling of the strip of 'ig. lo

Fig · 1? shows the elevation of a spread tubular counter-

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stand with outer ribs, which is made from the finished strip. 12th was produced.

Fig. Ik is a side view, on a larger scale than that of Fig. 3, of a strip with shells which do not overlap.

Fig. 15 is a side view and shows the shells of Fig. Ik perpendicularly from the base layer rRanzenden ^ bent.

Fig. 16 is a side view about coincident with Fig. l * f but with shells that overlap.

Fig. 17 is a side view showing the shells of Fig. 16 bent open at right angles from the supplementary base layer.

Fig. 18 shows another way of making parallel grooves in a bramaie.

Fig. 19 is a perspective view showing the arrangement of the grooves in a direction other than parallel to the long edges of the slab.

Figure 2o is a side view of a strip section for manufacture an object provided with ribs on both sides.

Figure 21 is a corresponding view of a portion of the strip of Figure 20 with the ribs bent.

^ Fig. 22 shows the end product of a slab with ribs, which in the

«» Stand at acute angles and are shaped from the shells according to the u>

^ Fig. 19.

O '

_ω Fig. 23 let a side view of a slab section with a plurality of different parallel planes lying channels and with

Grooves on the outer surface

Fig. 2 * f is the side view of part of a strip of fig 23 was rolled from the slab.

Fig. 25 shows the side view of the strip of Fig. 2k which has been spread apart into a honeycomb-like profile with protruding ribs.

Fig. 26 is a side view of a slab for making an article in which narrow, spaced channels are provided and the ribs of which extend both from the metal spacers and from the duct walls «

Fig. 27 is a view of an article which is opened upon opening of the channels and the erecting of the ribs is made of a strip which is formed by the rolling of the slab of FIG revealed.

Fig. 28 is a reduced-scale side view of an ingot for a further embodiment.

Fig. 29 is a perspective view of a portion of the ingot of Fig. 28 on an enlarged scale and with the billet severed Section showing the ingot after it has been partially rolled out and after the grooves have been cut

Fig. 5o is a cross-section along the plane 3o-3o of Fig.

Fig. 31 is a side view - with a portion of the finished rolled strip, which is from the in Figs. 29 and The piece shown on an enlarged scale emerged.

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FIG. 32 is a sectional view of the strip of FIG Figure 31 along the vertical plane 32-32. Because of the clarity of the Representation was not hatched

33 is a perspective view of a portion of the The strip of Figures 31 and 32 after it has been expanded into a tubular shape. He also shows an erect body rib

Fig. 3 ^ is a side view of the splayed body of Fig. 33 after the protruding corners have been bulged.

EXAMPLE

An embodiment of the invention is shown in FIGS. 1 to k. A slab 3 / ^ "thick from 2S aluminum was milled with a 1/8" slotting saw, with the saw blade at an angle of ^ 5 ° to the slab surface, so that several grooves Io at intervals of 1 / k " and 3/8" depth - calculated from the surface - have been formed, so that parallel metal ribs 11 remained homogeneously with the solid base layer 12 of 3/8 "thickness and integrally continuously connected · the surfaces of the grooves were provided with a silicone grease to the chweißen ^ö the To prevent surfaces of the grooves during rolling.

ω The grooved slab (Fig. 1) was then placed between the rollers eo introduced that the grooves left parallel to the axes of the rollers

_ω fen and cold-rolled in this transverse direction down to o.ifo "in three passes. The partially rolled slab (Fig. 2) suffered in the process

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a relative widening, ie almost twice as much in the direction transverse to the course of the groove; the walls of the groove were closed and some of the grease was squeezed out. The slab of FIG. 2 was then subjected to a further rolling in the longitudinal direction, ie the slab passed the rolls with the groove residues at right angles to the plane through the roll axes; in five cold stitches it was reduced to ο, ΐοο ". The metal of the ribs 11 was rolled out into thin shells 11a and the metal base layer 12 was reduced to a smaller thickness 12a, but the shells remained connected to the base layer in one piece Angle of the interfaces between the shells and the surface of the slab became smaller during the rolling, as _{can be seen from Figs. 1,} 2 and 3. The partially rolled slab of Fig. 2 was then annealed to make the work hardening zones disappear bring and was further cold rolled in the longitudinal direction up to a total thickness of o.o2o "in bank stitches the original grooves Io by rolling a row of shells or leaves 11b which stretched along the length of the strip Bowls were made of one piece with the material of the backing layer 12b, but independent of one another, so that each could easily be lifted off by hand as shown in Fig. k · The shells 11b were brought into positions, at right angles to the back 12b of the base layer (Fig. k ) and thus formed stiffening ribs and perfect heat conduction with the back slit 12b · They were about 500 ^H apart · while of rolling

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the ribs were transformed 11b in a triangular cross-section - in Fig · clarity k exaggerated - with a thickness of 0.008 "at the foot and from the back about 1" spreading, said free edge having a thickness, "which was of no significance · The edges can be folded, as the right rib in Figure k shows.The material of the back layer 12b was not of uniform thickness (see Figure k ) but tapered from one rib to the next adjacent rib.

The profile of Fig. K can be used as a wall in a heat exchanger, for example a liquid with a certain temperature can wash the smooth lower surfaces of the backing material 12b, while the ribs 11b protrude into a gas space with a different temperature Cooling system, therefore, the hot circulating gases are brought into contact with the ribs lib while the cooling water washes the lower surface of the body 12a. In a heating device, the cold air or gases sweep past the ribs 11b while the heating medium flows or sweeps past the lower surface of the body 12b. In the case of the wall profiles, the ribs Ub serve as mechanical stiffeners and are homogeneous and integral with the body of the base layer; they are therefore more tightly joined together and more precisely lined up than if the ribs are made from separate pieces and connected by means of soft soldering, brazing or welding.In addition, they retain the strength properties that they obtained through cold rolling and that are reduced by heating in the aforementioned assembly processes can; after all, they create a homogeneous path for heat flow.

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In the embodiment of FIGS. 1 to k , the ribs have a tapering cross section, the outer edge sections being triangular in section. This is a desirable form in heat transfer. The above method allows the production of a rib profile in which the cross-section essentially corresponds to the Madonna formula for the optimal height of a rib with a triangular cross-section:

b / 2 hb

where L is the height of the rib, b is the thickness at the base of the rib, k is the thermal Conductivity of the fin material and h is the film coefficient. This formula results in an optimal rib height with b = 0.008 " with aluminum to about 2 "with gas contact.

For maximum heat transfer, the ribs should theoretically be like this be arranged as closely as possible around a maximum piping area per Unit of area of the basic body to be obtained. In Fraxis it hangs the distance for the greatest effectiveness depends on the thickness of the so-called boundary layer on each rib surface. The thickness of this boundary layer is calculated from »

D ■ * f.6 * l times X times Re ¹ ^ ²

where D is the thickness of the boundary layer, X is the distance of a point whose thickness is to be determined, * the Reynold ^f from the edge of the flat plate and Re E-St-specific number is · The boundary layer of air on the order τοπ o "l to o »5", so that the parallel ribs should be arranged at intervals of o »2 to lo" ·

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In practicing the foregoing invention, the ribs can easily be made to protrude or have heights from a small fraction of an inch to 2 inches and more. The height is not limited by the distance between the ribs, since the product according to FIGS. 16 and 17 can have ribs with o «oo8" at the bottom and taper up to a feather thickness, whereby they are arranged at intervals of ο «5ο" and a height of l.oo "have _e Even larger ratios between height and width can be achieved if the grooves are disposed in a more acute angle to the surface of the slab or if the grooves are cut deeper and with greater overlap '.

In practicing the invention, the rolled strip can be of any desired thickness. By appropriately dimensioning the depth and the angle in the manufacture of the flutes, the ratio of the rib thickness to the thickness of the bottom layer in the strip can be determined for a given slab thickness. In this way, strips can be produced, from which the ribs are then bent, in which the ribs have the thickness of a metal foil, that is to say ^{from oool to o «oo3 H} and the base layer has a thickness of o.oo5 to o.loo" or own more.

The strips can be wound up in spools, stored and shipped and only later spread apart so that they do not take up a lot of space that exchangers with preformed ribs require.

The spread profile is also useful for use as a because of its strength, homogeneity and low price Cornices and envelopes for buildings. For example, has a body thickness

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of ο.125 "or more and rib heights of about 1" with a thickness at the root of 0.063 "for a profile that is for a Sims or is used for a plate, results in a strong increase in the load-bearing strength against external forces

EXAMPLE II

It is possible to have a profile for heat transfer with internal channels { and to create externally projecting ribs according to Figures 5 to 7

Here, the slab B, FIG. 5t was provided ^with a central channel 40, for example by casting aluminum or an aluminum compound in a mold which has a stainless steel core of the cross section shown} this core is O.125 "thick and 3 "wide, with edges 41, ideally by edges kl \ which were formed by surfaces inclined at 30 °. Such an ingot can be 3 1/2 "wide and 1 to 3/4"thick; after cooling, the core was expanded and withdrawn from the body portion 12. The ingot itself is peeled and the grooves Io be cut on both the upper and on the lower surface as the example of FIG · 1 shows · Schweißungshindernde substance such as liquid silicone grease is introduced into the channel ko and in the grooves Io · The ingot is to a program of transverse and Langesticheη - as described in embodiment example I - rolled to produce a total thickness of ο · ο4ο "to a strip (Fig * 6) · Here, the echweißungshindernde material is ko in the channel partly pushed out, so that the remaining substance grain is ten thousandths of an inch thick, but effective enough to prevent welding together The material 11 between the grooves

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in Fig. 5 has been brought into a solid form in a similar manner but residues of substances preventing welding in the earlier grooves · In general, it can be said that the cross-rolling spreads the slab and the stitches in the longitudinal direction round the edges of the slab; for example, a slab is widened to about 5 1/2 ", where the corresponding widening of the remainder of the channel 4oa is approximately 4 1/4 ". The cohesive base layer 12 forms the fluorine compounds 12a, which when spreading apart form a channel-like seam 4ob as shown at 43 in FIG. The long shells or leaves 11a formed by the rolled-out remnants of the material 11 are bent outwardly as shown in FIG. 7 to form fins 44 on a conduit for heat exchange with a high area ratio between the rib and the cross section of the tube 4ob. Since the walls 43 of the pipe are homogeneous and in one piece are contiguous with the ribs 44, there are no gaps or cavities that impede the heat exchange.

The task of the antiperspirant substance in the grooves is it to keep the sheets or trays independent of each other, which is done by preventing their surfaces from welding together. When the rolled strips of Figs. 3 and 4 have axles be bent parallel to the original direction of the grooves run, the shells usually form tangents to the curves so formed. The rolled strip of FIG. 6 can be formed into a round cylindrical shape as in FIG. 8 and the ribs 44 can Tone the curved walls 43 bent at any desired angle will. Here, the edges of the discontinuity are formed by the Substance residue 41 of FIG. 6 is caused by small receding angles 45 and the edges of the strip represent stiffening ribs 46

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which are as thick as the rolled-out strip in Fig. 6,

BB I SPIUL III

In Fig. 9 a double-wide bar is shown with two channels ko · On the τοη the rollers to be machined surfaces of the bar a number of grooves are provided - eedis in the present case on opposite channel sides ^ o - · The material between the grooves offers flat surfaces represents for the attack of the rollers · Sin central section lola of the bar, which lies between the edges of the two channels' to, has no grooves, likewise the material has no grooves at points Io2, ie on the side edges of the bar *

An organic antiperspirant substance can be as described above are introduced into the channels * fo and the ingot is hot-rolled are «Here the grooves are closed by the expansion of the material on each side, but remain as surface discontinuities Io3 present in the partially rolled strip of Fig. Io. It is recommended to use an anti-perspiration device Use substance to prevent the walls of these grooves from welding together or discontinuities. This can be the case with cold rolling by the commonly used oil or by the oil-water emulsion However, in hot rolling at a temperature where welding by rolling can occur, a substance must be used that can withstand the rolling temperature, such as an emulsion of graphite, a silicone or another substance that can be used before rolling must be introduced. During the rolling of the billet of FIG

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in the partially rolled strips ds? pig® Io, the area occupied by the grooves loo is greatly reduced than the material between the groove base and the Kaaal 4o «The organic welding-preventing substance is reduced and the channel ho is closed to such an extent that the thickness of the recess in Fig. Io is about one-thousandth of an inch . Practice has shown that this is sufficient to prevent welding between the walls of the channels * fo during the entire rolling process. This is shown by the thick line

The double-wide strip of Fig. Io is then cross-milled, -as Fig. 11 shows - to form grooves lok at such a distance from each other are that in the further Auerollen in the Shape of the Fig. 12 shells of the desired width are created. These grooves Lok of FIG. 11 are cut down to the depth of the bottom of the groove remnants Io3. The grooves can be shaped as in FIG or can be made by a multiple milling cutter as in FIG · In Fig. 11 is the effect of using a multi-mill shown, one wall of each groove is perpendicular to the substance tread lo ^ The grooves are at such a distance from each other that that a strip of surface Io5 remains between two grooves

The strip of Fig. 11 is then indicated in the direction indicated by the arrow Io6 Direction rolled, the material 11k being pressed down between the grooves lok until a strip like the one in FIG. 12 shows is achieved. In this stripe the bowls are like shaped above. It is usually unnecessary to use special information «- solution-hindering material is to be introduced into the grooves

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The forms shown in FIG Lubricants and coolants are used during rolling

The reduction in thickness from FIG. 11 to that of FIG. also causes a thinning of the base layer, so that the two Lines, in which the groove bottoms Io3 lie, move closer together The residual substance lo% still prevents the welding together or Zuaamaeahaft.

Now the bowls can be turned upwards to Hippen see below · This can be done before or after cutting the strip into the desired lengths can be made · The sugepisohnittenen pieces can then be stretched apart in the usual manner as they did FIGS. 7 and 8 show the product shown in FIG a central passage% ob of prismatic cross-section, where Each side of the prism has a series of transversely extending ribs Hn, which extend outwards from the base layer 12η. Using six grooves for the ingot of FIG. 9, each Half of the tube that has been extracted from one another has five side faces with five 8 «ts of such ribs between the outwardly projecting ribs Io7j The latter are the remnants of the material segments lol and Io2 des Barrens. These ribs have Io7 in the embodiment shown also shells on their surface, and these shells too can be bent to form the ribs l8o au, which is shown in FIG In execution, the side ribs will overlap.

The following may serve as an example from practice: The slab the Flg. 9 have 2 channels * to, each of which is 1/8 "deep and Jf" wide and which are separated by 2 "in the middle of the slab

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Sections Io2 may be one and a half inches wide so that the overall slab width is 13 ". With a slab thickness of 3", the grooves 10o at the bottom of the groove may be about ^ 5 ° and the width at the slab surface about ο ₍ 2β7 "· After hot-rolled in the shape of Fig. Io and the partially rolled-out strips have a thickness of 0.55 °, which corresponds to a six-fold reduction. The transverse grooves may then be milled at a distance of one-tenth of an inch up to a deep «of the grooves 1ο3 · Then cold rolling reduces the · strip thickness to that of Fig. 12, which is o _t o5o". Here, the channels ko _t, which were originally k ⁿ wide, are slightly widened to about 4-1 / 8 " The cold rolling brings about a tenfold reduction, so that the original distance between the groove bottoms Lok has led to the formation of soils lim with a width of 1 ". The product shown in FIG. di e • about 1 "protruding from their surfaces and di · at the point of bend are approximately one-thousandth of an inch thick · The base layer forms prismatic · sides, the thickness of which decreases from 0.025 to 0.05", as can be seen from FIG. 15 * u increase is "

The possibility of producing the objects of FIGS. K and 7 with high ribs and at selectable distances between them is illustrated in FIGS. 1k to 17. Figures Ik and 15 show profiles in which the rib projection or height does not exceed the space between two adjacent ribs The material ribs 11 located there are pressed together and their outer surfaces 13 are flattened in an approximately parallel plane with the lower surface of the base layer 12

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«Ground, the feather-thin edges do not extend beyond the root surface nrestee 15 of the next adjacent groove. Ik in the FIG be bent · 15, each ^K thus formed has ippe the surfaces 13 and 15b leading to the spring-thin edges 16 and has a generally triangular shape * While the rest of the interface 15 of FIG · I ^ the surfaces 15a forms on the base layer 12a

In FIG. 16 the grooves were originally closer together and had a smaller angle to the surface of the slab. During rolling, the individual shells 11a therefore expanded over the roots Ht of the next adjacent residue 15; in the representation to the perpendicular plane P, which passes through the second residue 15 "If wolche shells are bent into right angle (.? Figure 1), the height of the tilting 11b about the DoppeH: * tee ί ctnndes between the parallel Ribs. The lower half of the rib is of uniform thickness, while the upper part has a triangular cross-section and ends in the feather-thin edge 16

In any case, the rib is connected to the base layer by a portion which has curved surfaces; one connects them Planes 13 and 15 "and the other extends from the surface 15b after the root l * t · The surfaces 15a on the upper side of the basic surface deAn thus extend between two successive ribs and run at an angle to the underside of the base layer. In the case of the individual rib, one of the curved surfaces goes from the neighboring one Surface 15a at the thick portion of the base layer while the other curved surface leads to a strongly re-entrant angle;

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This angle connects with the other adjacent surface 15a on the thinner column of the base layer

The grooves Io do not need to be uniformly wide. In the Fig. 18 is a series of grooves log by means of a set of angle mills 7o, which sit on a mandrel 71, manufactured · At the dar-. The cutters provided have one side perpendicular and the other inclined at 70 ° with respect to the surface of the slab B, so that one side each Nat is perpendicular to the slab surface. In practice Using hand saws, narrow grooves of, for example, o.o ^ o "wide were made manufactured·

A previous cross rolling as in Example I is not necessary, since certain reduction steps can be used in longitudinal rolling in order to flatten the material ribs 11 and to achieve the further reduction to the desired strip thickness of the body and the shells. For the slabs of FIG · l _t 5 and l8 eind achweißungehindernde substances such as silicones or Hydrocarbon- grease to use and provide only length rollers "

If a strip with transverse ribs is desired, the original grooves Io or log are to be cut across and then rolled lengthwise; but they can also be cut lengthways and then rolled across. "It is not necessary for the grooves to run parallel to a slab edge". When such a slab rolled and the shells bent upward werdea _e are the hip diagonally _(usually at an angle of voa the differs, old äem. € io Hu "th were cut * WSAS so äie- Sfetea about 89 ^s st" E = l-ä edges are cut «a <ä eil © By aims © läBgeg © walst _s S ₃ B * ^f / © E l ^so

Ci '<= J ca) Wf ξ cJ ff ν <iJl J) ^) «a ^ jI

1/5 "thick · with an insignificant widening, the shells are oriented at an« angle τοπ about k5 ° . Such a product can be seen in Fig. 22. When the shells of such a strip are bent open, a body as in 22, wherein one end of each rib is preferably sheared off, so that the side edge instead of the line 136 with the line 137 and thus a symmetrical appearance to the other edge 138 is achieved.

EXAMPLE IV

A further application of the invention is shown in FIGS. 2o and 21, including producing a profile with ribs on both surfaces and creating a sheet metal with ribs on both sides. The slab can be used as in FIGS must be trained but have external grooves on both surfaces. It is then rolled into a strip, part of which is shown in Fig. 20. the Remnants 15 of the outer grooves and the shells 11a are present on both surfaces and the ribs 11b can be removed from the base layer 12c be bent into the untwisted position, as shown in Fig. 21 ·

The object of Fig. 21 can be used as a self-reinforcing profiled sheet.

BSISPISL V

Another application is shown in FIGS. 23-25. The slab

- 22 -

The Fig. 23 has the external grooves Io on both sides with the ribs 11 in between! exactly as in FIGS. 1 and 18. The material of the base layer or the body, between the bottoms of both rows of grooves, is provided with length channels * fo in several levels, the channels of one level being staggered to those of the adjacent level and with partial overlap are arranged, for example, overlaps a channel * fob in a plane grain one third of the width of a channel in the Sbene underlying 'hair dryer and a further third overlaps another channel in the plane' hair dryer while the remaining third or the central portion of the width of the canal in the plane grains over the material zone 12x between the canals of the plane * fon, whereby in the illustration the zone was chosen to be one third of the width of a canal. In Fig. 23 5 such planes with canals are shown. After rolling of the slab, the strip shows the cross-section shown in FIG. 24, with the remnants 13 of the outer grooves between the shells or blades as previously present ind and the channels kob di "Best * fod form of echweißungehindernden substance · Since the material expands ale continuous layers between these residues, the layers are integrally connected across connected through each level at the points 12x and between adjacent channel residues of a given level.

The strip of FIG. 2 * f is then opened, ie mechanical or hydraulic devices are inserted on the individual residues koa. The material connections 12x on top of each other are moved apart, as are the channel surfaces 15x in the middle section of the remainder of the channel in between.

905 * 4 * / oö 33 _ ₂₃ _

the "defined by the lateral edges of the relevant residues 15 in FIG · 2k" Ground the W _e rkstoffabschnitte 12m, between the surfaces 15y of the overlapping portions of the Kanalreete 15 of FIG lie · 2k are bent to an angle, being noted is that this section 12m is of uniform thickness in the illustrated embodiment. The extended profile of Fig. 25 has a body with honeycomb-like, elongated cells with a hexagonal cross-sectionThe outer longitudinal shells are bent outwards as before and form the outer ribs Ub on every surfaceWith this method, the material thickness can be 12m twice The individual cells can be large or small, depending on the transverse dimension of the channels * tob in the original slab of FIG. 23. When the strip of FIG. 2k is stretched out into the honeycomb of FIG. 25, the width is reduced as the thickness of the body increases with stretching · Bs is a trigonometric function of the angle at 15 ". *

EXAMPLE VI

In FIG. 26 a slab can be seen, the outer longitudinal grooves or discontinuities on the two surfaces and material ribs 11 between the grooves has · narrow channels * tof are far apart provided along the median plane. When this slab has been rolled into a strip, the remnants of the channel are opened by mechanical or hydraulic devices and the ribs at a right angle bent to the general width direction so that an object according to FIG. 27 is produced. In this object, the ribs are standing

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IIf voa the broad material sections 12 * from the calibration on the sides of the pipe sections kot outward & s extend "This Rohrabsohnitte hot also have ribs Hg ·

If a side channel is knocked out, wi? 26, is provided, the rolled strip has the best of it and when the strip edge is trimmed in the line, this remainder is released and the delimiting lamellas can be separated to form the ribs 11h, which start from the pipe section ko at a point that is diametrically opposite to where the adjacent material section 12 attaches *

Such objects as in Fig. 2? can have tubular bodies with any cross-section; the dimension is determined by the width of the channels ko in FIG. 26 and can be from ₀ l / k to I ¹¹ with a wall thickness of 1/8 "down to a few thousandths of an inch. The projection and the number of ribs can also be selected are · Di "pipe sections do not need in the single article of the same diameter to be, it must have the dimensions of the respective channels kai in the slab are selected according to, it being noted," that the rolled-out width of the channel Restee represents about half of the inner surface of the pipe section ·

In Figure 5, the walls are the outer grooves or discontinuities on the two surfaces inclined in the same direction · This is not absolutely necessary, since the grooves can also be inclined towards one another, as Fig. 26 shows.

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■ asssassisxaizaiiissias

At the floodplain lead around to the rig. 28 to ~ k} denotes di · slab 12o • · in eiafaohe rectangular · Außeaumraaduag with four internal Läagskaaälea Ho "it Werkstoffabsohnittea 123 iwieohen the edges of adjacent Kaaäle AUOH and at the side edge of the Bramae. This slab "can be hot-rolled with a sweat-inhibiting substance in the canals a ho _% as stated above, in order to get the partially rolled strip" 121 off. This strip then receives two longitudinal or first hats "122, with each groove above the The remainder of the channel in question was at the height of the edge of which it is located. Next, the "groove" lop is formed transversely, corresponding to the groove "Io, log and lok in Fig. 1, 18 and Ie, so that the butt" lip swisohen every pa & r Adjacent Nutea Torhaadea siad · The strip 121 is rolled further - preferably successful a dl "last stitches during the cold rolling because of the stiffening effect - to get the" strip 125 of fig / 2 "thick is» and the finished rolled strip »about 0.02"thick; while the läagsautea 122 looks like it disappears and the upper and outer surfaces have become smooth, however, the surfaces of the grooves 122 have not united with one another and the discontinuities 126 do not exist; 31); they form lateral boundaries for the longitudinal rows of the shells 11r (FIG. 32), which cover the upper sections of the relevant segioaea of the substance residue. The strip can be separated in the longitudinal direction in the line 127 (Fig. 31) at the wide material sections 123, so that wide strips are simply created, each with a central substance residue 12k, the upper

909843/0033

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Fläohenechichtea a "dta Kent" connected and provided with the upper and lower rows of shells "Part of such a simply wide object is shown in perspective in FIG. 33 Here the substance residue of the Kaaal allowed the formation of a hull in the lengthwise direction at fig. 7, surrounded by the material layers Ί-3 & and connected at the edges by the projections 128, which have approximately the thickness of the two layers with the shells will shell sections separate, the fod in the rig · 35 are located above and below the channel * · the shell sections over the channel * death can now lifted "to sip" to form kk ie before; FIG. 33 shows such a raised rib, and the same thing happens with a shell made from the material sections of the projections 128. The ribs extend transversely when the grooves 10 of FIG. If a cut

127 takes place according to FIG. 31 in the middle between the edges of adjacent inner beds IZk , the connected projections extend

128 over half the distance · through the material sections 123 is formed between two remaining channels · Also the projections 128 can be folded, as indicated by line 13ο in Fig. 33 and the remaining material can be pressed into a smooth outer shape (see point 131 in Fig. 3 **) by using a Domes on the inside and an external pressure, e.g. by a hammer, noting that the internal re-entrant angles 13 ^ in Fig. 33 worked out to the point of invisibility.

The method can be used on ductile and rollable material, Einsehl »Aluminum and its alloys, zinc, copper and copper

9098 4 3/0033

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alloys and stainless steel, and with Warnwals- and Kaltwala-PrograKneft a final heat treatment can be carried out according to the material not to be the same and should be selected according to the material and the temperatures involved can be · 5s s.B · graphite can be used with copper and most copper compounds, but not with aluminum because of the later occurring electrolytic chain, still with iron compounds because of the formation of carbides · Finely divided refractories such as alumina, silica and titanium can be used, especially if a matted surface is desired on the finished ribs. They can be applied with a spray gun or with a device which sprayed the material by means of a flame. With some materials the surface itself forms a resistive layer that the shells prevents ζneair.menzuGwelding during rolling.

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909843/0033

Claims (1)

PATENT CLAIMS HssssrscnutrsssxssrsxExtBszesstl 1, A method of removing a work piece with butts, with the base layer or the sole forming the back the protruding ribs consists of one continuous piece, marked by the fact that a bride is provided with discontinuity · », the το η lhtfer surface aaoh inside The material sections extend, the slab is rolled, its thickness being reduced and its surface area being expanded between adjacent discontinuities su shell »are formed on the surface of the rolled slab, the shells are bent from the thinner base bad to form ribs, ■ I which go out at a distance from the primary layer and are integral with it related. 2. Sin method according to claim 1, characterized in that a welding-preventing substance i "the discontinuity ^ is present before rolling" 5. / m Sin method according to claim 1, characterized EKA g m -. Characterized in that the discontinuities are parallel and at least one surface of this ^ discontinuities forming an angle with the slab surface unknown " -29-9098A3 / 0033 JGlNAL IWSPgCTED The method according to claim 1, characterized in that the discontinuities are grooves which are parallel would run past the longitudinal edge of the slab. % Ii »Method according to Anepruoh 1, thereby g β k β η η -ι ι i ο h ι ι t, that the slab first in the transverse and then in the longitudinal direction is rolled " 6 · li »procedure» according to claim I ₁ thereby geke ■ a «-» • worthwhile, AaA the disco »ti» uitäte »parallel grooves and the groove» angularly su the mentioned »slab surface are cut, with adjacent grooves» »loh overlap «· 7 · Bi * Verfahr · «according to claim 1, characterized in that the discontinuities on both sides of the Slab are present and the shells formed on the two troughs are bent »· 8 · Bi »method» according to claim 1, characterized in that the slab has an inner channel with a smoldering · » has solution-hindering substances, the canal walls after the forest Ben bent apart to make hollow profiles with external ribs to obtain" 9 · A method according to claim 1, characterized in that the discontinuities are grooves which are parallel 909843/0033 - 3ο - run in the direction of rolling and are spaced apart to create areas for initial contact with the rolls Io, lin method according to claim 8, characterized in that the slab is provided with a plurality of inner channels with a greater width than the height, which is in the central plane of the Slab are arranged, first grooves are formed in at least one sit the orphan coming into contact surface, which is parallel but wall direction extend, second grooves in the surface mentioned, at an angle to the Walzriohtung, are formed, which are approximately which have the same depth as the first nutea, the aforementioned Muten discontinuities result in the channel walls after rolling be moved apart, whereby they form hollow profiles, with longitudinal rows το η separated ribs that extend from the walls of the hollow profile protrude 11 «lin method according to claim Io, characterized in that the slab is partially rolled after the first grooves are formed, whereby the surfaces of the first grooves are closed together and the second grooves are made in the partially rolled brow. - 31 -9098A3 / 0033 12 "One method" according to claim Io, characterized in that the channel edge is located at intervals and the second rods extend over the material in the intervals and when the rows of ribs open on said material in the intervals one row of ribs on another row of ribs overlaps the adjacent wall section of the hollow part of a profile 13. A method according to claim 12, characterized in that the slab is separated in the longitudinal direction is after the material has been rolled between the second grooves to close the walls of the second grooves, which Separation along the strip of material in the space between the neighboring canals and at a distance from these canals Ik * Bin method according to claim 8, characterized in that the slab is rolled out into a sheet before the surfaces are grooved * 15 · Bin method according to claim 8, characterized in that the slab has internal channels which overlap, the slab is rolled out into a strip that Walls of the canal reeds moved apart in the rolled strip to form a honeycomb-like profile 909843/0033 16. Bin V _he drive according to claim 8, characterized in that the slab is provided with two outer first longitudinal grooves on one of its surfaces, each groove is arranged opposite the channel and close to its edge, a plurality of outer second transverse grooves are arranged «which cut the first grooves, the shells formed between the said first grooves opposite the channel and are lifted after rolling A method according to claim 1, characterized in that the discontinuities are parallel grooves, which extend at an acute angle to the longitudinal and transverse direction of the slab 18. A method according to claim 1, characterized in that the discontinuities are parallel grooves, with even spacing between their wall surfaces. 19 · A method according to claim 1, characterized in that the discontinuities are parallel grooves, the grooves have a triangular cross-section and are calibrated at intervals from each other, so that there are patches of area from the original outer surface - 33 -9098A3 / 0033 2o # Iin Ttrfahr · η according to claim 7 ι characterized _t that the discontinuities are grooves whose • one wall forms an acute angle old of the Braamenoberfliehe in question, the said wall but brae surface sweeping angular and convergent let 9098Λ3 / 0033