DE2030063A1 - Kuhlrohrbundel and process for its production - Google Patents

Description

DB. ING. E. HOFFMANN · DIPL. ING. W. EITtB · DR, HER. NAT. K, HOFFMANN

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D-ίΟΟβ MÖNCHEN tO · MARIA-TH EHESIA-STIASSE «· TELEPHONE {0 * 11} 4410« 1 /.VJOU Uü3

SOCIETE ANONYME EBS USINES CHAUSSON, Asnieres, Hauts de Seine / France

KUhlrohrbUndel and process for its manufacture

The invention relates to a method of manufacture of coolers, for which the secondary heat exchangers forming cooling fins much thinner metal foils than before can be used, which means a considerable saving in metal and a weight reduction of the KUhlrohrbündels has the consequence, while at the same time the Witmetauech properties and the mechanical strength of the products made according to the invention KUhlrohrbUndel better than known cooling tube bundles is.

-2-009882 / 1511

BATH ORIGINAL

Furthermore, the method according to the invention allows a substantial simplification of the production of a cooling tube bundle ». In particular, inserting the »tube into the bores of the cooling fins poses no difficulty here dar and ea there is no risk of damage to the KUhIrlppen or the pipes, as has been the case up to now.

For this purpose, the invention is the procedure characterized by »dafijln thin, the cooling fins bll-

* the plates for the implementation of the tubes specific bores are made, the dimensions of which are slightly larger than those of the tubes of the cooling tube dealer to be produced Sets of ribs are then put together to form a package, so that the tubes of the cooling tube bundle are inserted into the bores of this package and that the cooling ribs are pulled apart by increasing at least the first cooling ribs of the package and thereby deformed to form a cell structure, with the side edges at the same time Your bores are pressed against the walls of the pipes and deformed to form attachment rings.

The invention also relates to a cooler * the one KUhlirohrbüadel produced in this process is salted.

Welterei details of the invention result from * the following description of exemplary embodiments, reference being made to the accompanying drawings Seig on this drawing

009882/1511

Pig. 1 is a schematic plan view of cooling fins of a cooler according to the invention

Fig. 2 is a side view of another embodiment a cooler according to the invention;

3 shows a perspective illustration of a device according to the invention Cooler during one operation of the inventive method!

Figure 4 is an enlarged side view of a detail a cooler "which illustrates another operation of the inventive method

Fig. 5 is an enlarged side view of a detail of a finished cooler

Flg. 1 shows two different sets 1 and 2 of Cooling fins for a cooling tube bundle.

The hip of each set are equally made of metal thin films, in which holes 3 sun passage of the pipes 4 (Fig. 3 to 5) are provided "the zueaa- mm With the cooling fins after the Zusaanensetzen form the cooling" tube bundle "have These holes 3 one of the shape of the tubes 4 corresponding shape boi Flnchrolnren in "plelsweise one is substantially rectangular shape" their JfömasMiiiicen are however some gruSer "la dl" AuSmitosaeuft "gen the Hohre _t so (JTS this following the Iw hesckrie" Weis "without Üeibmtg or with slight friction in * -w «rd« n -kuiuien ·.. ';. '

009882./151 1

OH «" * ¹ -

One operation of the method according to the invention consists in that the individual cooling fins of each set of fins 1 and 2 with one another and these sets of fins with one another get connected. This can be done in different ways · For example, the Sets of ribs 1 in the spaces between the bores 3 slcn in the transverse direction, preferably from the entry edge to Adhesive strips extending from the outlet edge of each cooling fin 5 applied, each time leaving a gap. Adhesive tapes are applied to the sets of ribs 2 in the same way 5 *, which, however, is based on the Pig. I pictured Catfish are each offset from the adhesive tapes 5 by half a step. Furthermore, on the little ones Bndkanten the cooling fins applied adhesive tapes 5b, of which the two cooling fins at the ends of the Be excluded from the cooler. Now all cooling fins are through Pressing together along the adhesive tapes 5, 5a and 5b attached to each other.

Instead of adhesive tapes can be used to form Rib packs other facilities can also be used. For example, there are numerous in particular in the KUhlertohnlk other processes that are easy to carry out are known, such as soft soldering, hard soldering or cold forging. Here will be the blanks used to form the cooling fins are covered beforehand with a suitable ink, the with one another XU connecting areas freeze »and ansdüeßend the suesjHengeetig rib plate.

Fig. 2 shows a and ·? · Verf®ta * iiiisweiee. Here will be the EUhirippün at the BiMimg der-Botaaageft. > belapl * wise Bit help a «

ULeiwl «ine

882 / ti

.. ■■■■ - 5 -

exactly in one line in the manner shown. Then the support areas are bombarded with electrons welded by passing the assembled set of ribs under an electron gun. In this way a raw package is formed that is particularly suitable for the operations to be carried out. According to the mutual Attachment of the cooling ribs in the manner described above, the tubes 4 are used. This operation is very simple that the holes 3 are larger than the pipes.

Flg. Fig. 4 shows the next operation, which consists in that the package of the pushed onto the tubes Ribs pulled apart with the help of suitable combs and thereby receives a cell structure.

As FIG. 5 shows, the side edges come here 3a, 3b of the holes 3 with the wall of each tube 4 in Contact. Because the cooling ribs have an extremely small wall thickness of, for example, a few hundredths of a millimeter have, the side edges 3a »3b are deformed when the cooling fins are pulled apart further and form collars 3c, 3d, which are held pressed against the walls of the tubes when the set of ribs is completely pulled apart. To the To facilitate the formation of the collar 3c, 3d, as FIG. 1 shows, at the ends of the side edges 3 », 3b each Bore 3 cracks or incisions 7 are formed. This makes the metal easier and, in particular, more uniform Bend over each side edge · 3a, 3b.

The combs used to pull the set of ribs apart are inserted between the outermost cooling ribs and the cooling ribs immediately following (cooling ribs I ₁ and I ₂ on Pig. 4).

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00 9882/1511

, 2CT0063

There is an expedient development of the invention in that on the rib package tube plates 8 on the same Catfish are attached as the connection of each Cooling fins was carried out, and that the pulling apart of the fin package is achieved in that the both tube plates of the cooler can be pulled apart by pulling them. The combs or other organs lie here directly on the underside of these tube plates.

Then only the ends of the tubes 4 have to be sealed against the tube plates 8, which can be done at any time known way, for example with flexible seals or, if necessary, by means of heat treatment, through which a welded connection is achieved, can be made. The second approach is suitable in particular when the cooling fins are attached to their support areas 6 in the manner described with reference to FIG be welded by electron beams, since this involves the soldering of the tube plates and even the Pulling apart the set of ribs formed collar 3c and 3d can be easily achieved by soft soldering.

The invention is not limited to the exemplary embodiments described above, but various IHSt Changes to.

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009882/151 1

ORIGINAL INSPECTED

Claims (5)

Patents s ρ r üche l) A method for the production of KUhlrohrbündeln, characterized in that in thin plates forming the cooling ribs for the implementation of the tubes (4) certain holes (3) are made »the dimensions of which are somewhat larger than those of the tubes of the KUhlrohrbUndeis to be produced, that the cooling fins are connected to each other in two alternating sets of ribs (1, 2) by cross connections (5 * 5a) offset from those of the other set of ribs, so that the sets of ribs (1, 2) are then put together to form a package »that in the bores (3) of this package, the tubes (4) of the KUhlronrbUndels are inserted and that the cooling fins are pulled apart by pulling on at least the outermost cooling fins (I ₁ ) of the package and thereby we form a cell structure are deformed, at the same time the side edges (Ja, Jb) of their holes ( 3) pressed against the walls of the tubes (4) and deformed to form contact collars (3c, 3d). 2. The method according to claim 1, characterized in that additionally on the outermost cooling fins (I ₁ ) of the rib package two oppositely arranged tube plates (8) are attached and that a train is exerted on this, whereby the rib package to form a cell structure is pulled apart. 3. The method according to claim 1 or 2, characterized in that g e k en η, that in the extension of the rare edges (3a, 3b) of the holes intended for the implementation of the tubes (4) (3) Cracks or incisions (7) are provided that prevent the bending open of the contact collars (3c, 3d) during the opening » make it easier to pull the rib package differently " -8-009882 / 1511 BATH 4. The method according to any one of claims 1 to J5 * marked «that the connection of the another set of fins offset connection of the cooling fins to each other by gluing «welding» rollers or on other known catfish is reached. 5. The method according to any one of claims 1 to K, characterized «that on the parts to be connected to each other of the cooling fins simultaneously with the production of the bores (4) in the cooling fins support lines (6) are formed« that the ^A Uhlrippen are superimposed ge and that the support areas are welded to one another with the aid of an electron beam. .009882 / 1511 ORIGINAL INSPECTED i e r s e i t e