DE1806737A1 - Process for the production of heat exchange elements for heat exchangers working with water circulation as well as device for the implementation of the process - Google Patents

Description

The patent attorney Dipl-Ing. W. Beyer

UOCO ERAN'rCFUI-.T / MAIN "- BARON-VOM-STEIN-STRASSE18

In. Things: Az.!

Corporation
5 Cologne-Rhine
Kenry Ford Street

Patent application

Process for the production of heat exchange elements for r.iit 'tank circulation heat exchangers so / ie Device for carrying out the method

Priority to U.S. Application No. 685,923, dated November 30, 1967

The invention relates to elr. Procedure au :: ».-. Ers-cellen from Heat exchange elements for rni-c water ural on working heat exchangers, in which a deformable metal band is converted into uniformly shaped segments with wech- ™ through VJalzenmatrizen Selv; iron bent connecting parts is pre-folded and then the folding by means of a special clamping device is reinforced ^, as well as a device for implementation of the procedure.

Although the individual design features from each other may differ, there is a cotor cooler in general from an egg. nl as stank and an outlet tank, which are connected to the cooling jacket of the machine

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the heat-distributing device is connected between the two tanks, by means of which the water flow flowing from one tank to the other is broken down into a number of thin partial flows _? which in turn are enclosed by narrow water pipes made of heat exchanger material. A heat exchanger cooling fin is generally folded back and forth and positioned between the water pipes to divide the space into a number of narrow air ducts.

In general, the opposite _v sides, respectively. the front and back surfaces of the packages are first immersed in a melt flow and then in solder in order to seal the wall edges of the water pipes and to connect the cooling fins to the walls. If the water pipes and the cooling fins are evenly shaped and thereby it is possible to maintain continuous contact from edge to edge, an inner capillary flow of the solder will set in towards the inside of the package and good cementing will occur , through which a free flow of heat in the fins is guaranteed.

For the production of alternately folded cooling fins of the same dimensions and impressions of even deformation into the. Various devices and methods are known in the art of strip material and are described in the United States patents listed below. 1,012,568; 1,148,670; 1,212,482; : Λ .617 163; .

1,640,147; 1,937,466; 2 141 235; 2,252,209; 2,329,789; 2,443,377;

2,433,694; 2,035,403; 3 083 662 and 3 214 954., ■ .-

The object of the invention is to provide a method and a pre, -f _{£ i:} j .. _:; indicate the direction to carry out the procedure through which

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a uniform folding of a tape is guaranteed ■ and with which a considerably improved connection possibility with the adjacent walls. In accordance with the invention, this task is accomplished by making the apex of the connecting parts of adjacent, opposite folds by oppositely directed compressive forces flat, level surfaces are deformed.

With reference to the drawing, an exemplary embodiment is shown below of the invention described in more detail. Show it:

Fig. 1 is a semi-schematic side view of a

Sheet metal forming apparatus, which is used in accordance with the invention Can be used to manufacture shaped strips

Fig. 2 is a perspective view of a device according to the invention manufactured heat exchanger elements ^.

In FIG. 1, a metal band 13 is rolled up on a roller 11 in such a way that the ketallic band can be conveyed by a Roller die 15 is possible, which the tape in regular Distances are deformed and the tape is bent over in consistently large kinks. The belt 13 can be of any use Lich metal or alloys with good heat exchange properties exist, for example copper, aluminum, brass etc. # The roller die 15 consists of a pair against each other serrated shaped rollers 17 and 19, each of which contains a number of gear-like wheels or blades, which in Operating position with the corresponding wheels or leaves the backing roll are in engagement with the intermediate belt.

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The element shown in perspective in Fig. 2 has a ribbed or folded line with a series of flat strips 16 between the folds or curved. Connectors 18 ". A typical strip material has a thickness of approx. 0.75 mm. Each strip has a number of folds each of which comes from the ground plane of the strip protrudes so that each strip has a number of air slots 20. Deformations carried out in this way are provided to support the regulation and direction of the air flow through the radiator core. At the Plating of such strips must maintain such air slots or other deformations when the strip element works in the intended manner in the radiator.

After passing the rollers 17 and 19, the now directionally deformed and partially folded belt 13 runs over a plate or table 21 and comes into engagement with the teeth of a star wheel 23. This star wheel 23 can ',. two or more toothed wheels 25 arranged in parallel, which are arranged in such a way that they mesh with one another and exert a force on the parts of each strip which lie between the above-described air slots or other deformations. The star wheel 23 presses the partially folded strip 13 against and possibly by means of a spring-loaded balancing device 31. This balancing device 31 consists of a support stand 33, which in turn is arranged on the plate 21. A horizontal pivot pin 35 fastened to the stand 33 holds a pivot arm 37. An upper shoe 41 is pivotably articulated to the pivot arm 37 by a pivot pin 39. The pivot arm 37 is under the downward pressure of a spring 43, one end of which is in a ·

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sy liner; * - see hole 45 in the swivel arm 37 supported and with their, opposite cuds ar. attached to an arm 47, d ^ r w-c ^ crurn with its one end over a spring 49 with c ^ -rn itUnder 37 communicates. The arm 47 is with a locking screw 51 for adjusting the spring pressure against the Swivel arm 33 is provided. The lower shoe 55 'extends through an opening in the plate 21 and is under one constant pressure of a spring 57 held by a rod 59. The rod 59 is attached to the plate 21.

With the spring 43 the desired resistance against a passage of the partially folded. Strip 13 set between the upper shoe 41 and the lower shoe 55 will. The star wheel 23 pushes the partially folded strip 13 into the passage between the upper shoe 41 and the lower shoe 55 and thus brings it into contact with the upper one. Shoe 41 and the lower shoe 55. The folds in the strip 13 are increased because a pressure is created by the constant conveyance of the strip material the star wheel 23 builds up, which may lead to a clamping pressure that is sufficiently large to be applied to the strip to exceed the pressure acting by the springs 43 and 5 7 together with the throwing off of part of the strip 13 * As soon as the pressure of the belt 13 built up between the star wheel 23 and the pressing device 31 has equalized, restrict the springs 43 and 57 the further movement of the belt 13 between the upper and lower shoe until such a thing The band 13 has been pushed together again. As a result of this pushing together by the force of the lower and upper shoes, the folding of the strip initiated by the rollers 17 and 19 is increased. This FaIt-

heard
or deformation process becomes the state of the art. If

However, it was used as the only means of deforming Fo 7818 hg / 29.10.1968 '...

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BAD ORIGIN ^ "■:"; ar. ι

being, it tends to be sufficient because of it Folding des'Bandes in the desired folds and corrugations ■ required pressure to disadvantageous twisting of the band. According to the invention is advantageously the spring-loaded Maintained pressure passage 31, which prevents slipping of the ribbon material between the upper shoe · 41 and the lower shoe 55 causing pressure but reduced. This process creates an additional fold without undesirable Twisting or discoloration achieved »

The belt 13 now runs directly from the spring-loaded printing passage 31 to a folding device 61 consisting of folding rollers 63 and 65. In another one, not shown here In the 2nd embodiment, the printing passage 31 is omitted so that the pre-folded tape goes directly to the rollers 63 and 65 got.

The rollers 63 and 65 alternately grip the opposite ones Fold the band 13 in. The arrangement of the rollers 63 and 65 with respect to one another in connection with the ones on the belt 13 acting pressure increase the density of the preformed folds by their counter-rotation, whereby the connecting parts 18 on their desired consistently large arc. In this embodiment the roller rotates 65 clockwise and roller 63 counterclockwise.

The rollers 63 and 65 are arranged at a distance from one another and aligned with one another so that they through Vertical displacements can be brought into contact, i.e. their teeth or prongs are in those shown in Fig. 1, staggered relationship to each other and are aligned so

that while maintaining 'this attitude they are an Indian teeth
allow the mutually moving rollers to engage one another.

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^If the teeth or prongs of the roller 65 and the IValzo ö3 are therefore directly opposite, there is a longitudinal bisection line of such a tooth so / ie a transverse bisection line of this roller in alignment with the corresponding bisection lines of a groove in the roller 63.

The prongs or teeth of rollers 63 and 65 are in mesh with a column part of the band 13 over the full bandwidth and drive the belt between counter-rotating rollers 63 and 65.

The distance between the rollers 63 and 65 is so great that common pressures of the roller pair, which result in pronounced deformations of the essentially flat strips, are prevented. Advantageously, the rollers are oriented so that the strip can pass between them in a substantially parallel relationship. The pitch of the pitch can be controlled by adjusting the distance between the rollers. Moreover requires ä ^ r protection upstream Roaming formation is a consideration of the depth of the grooves and / or the height of the teeth or prongs. Only the bent connecting parts and the part of the flat base surface between the connecting part 18 and the folds 20 come into contact with the drive teeth. In this way, the surface structure of the strip is retained undamaged by avoiding direct contact between the roller teeth and a sufficient distance between the rollers, and the occurrence of upsets and jamming is prevented. The rollers 63 and 65 are provided with guide rods 75 and 77 which serve as a guide j for the belt 13 when it has passed through the rollers 63 and 65. Immediately after the strip has passed through the zone of greatest pressure between the rollers 63 and 65, it tends to be

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to clamp it to one of the rollers »This is the purpose of the. Sliding plates 75 and 77, which strip it off the respective role.

The sliding plates 75 and 77 guide the folded strip 13 from the rollers 63 and 65 to a forming device 81 which flattens the tip circle of the link 18 so that a flattened surface 22 is created along the full length of the head line which is then in contact with the water pipes the heat exchanger device is brought. The area 22 extends the entire length of the head line. The surface 22 is shaped so that there is continuous contact between each of the end portions 18 and the flat side the water pipe allows.

The forming device 81 consists of a vertically adjustable, stationary counter pin 83 and a vertically reciprocating hammer link 85. In the embodiment shown the hammer member is held by a first bracket 87 and a second bracket 89. Near the top An adjustably mounted guide 95 by bolts 91 and 93 is arranged on the carrier 87. At the bottom. ^ A fixed bracket 97 is attached to the carrier 87. A rotatable shaft 99 protrudes through the carrier 89. With this shaft 99 " a drive wheel 101 and a belt pulley 103 are connected in a rotationally fixed manner. This pulley is rotated by a drive belt 105, which is connected to a conventional, not shown torque generator is in connection.

A drive arm 107 is rotatable with a bolt 109 connected to the drive wheel 101. This bolt 109 is mounted eccentrically in the drive wheel.101. The arm 10 7 is through a bolt 113 rotatably hinged to the arm 111. This arm 111 is rotatable on the clamp 97 by means of a bolt 115

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■ Τ ■: «

angelerJet and is carried by it.

A further bolt 113 connects the arm 107 to the arm 117. The opposite end of the arm 117 is connected to a sliding member 121 by means of heating 119. On the other side of the sliding member 121 there is a fixed hammer head 123. This sliding member is held in a displaceable manner by the guide 95 and, when the belt pulley 103 and the drive wheel 101 are driven, is set in reciprocating motion by means of ά & η xieiüen 105. The rotational movement of the drive wheel 101 is converted into a single discontinuous movement of the arms 107, 111 and 117 by the eccentric mounting of the arm 107, which is transmitted in the form of a reciprocating movement to the sliding member 121 and the hammer head 123. In the preferred embodiment, the counter pin 83 and the hammer head 123 have a curved working surface in order to limit the compressive forces acting on the band 13 to a predetermined number of end links 18. The pressure acting on the band 13 when the hammer piston 123 is in the uppermost position is insufficient to deform the strip 16 in an undesirable manner, but it is large enough to ensure a flattened surface along the cross head 22 of the end part. The exact pressure value required for such a flattened surface 22 must be found through various settings. It will vary with the thickness and composition of the tape material used.

After the belt 13 between the counter pin 23 and the Hammer head 123 has passed through, it becomes a not shown here by parallel guides 125 and 127 Collection device directed.

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Claims (2)

- -IQ - - ■ ■ ■. Claims 1. Method of manufacturing heat exchanger elements for heat exchangers working with water circulation, in which a deformable metal strip is uniformly distributed through roller matrices shaped segments with alternately curved connecting parts pre-folded and then the folding is reinforced by means of a special clamping device, characterized in that the vertices of the connecting parts (18) of adjacent, opposite gaps (16) by oppositely directed Compressive forces are deformed to flat, level surfaces (22.). . 2. Device for performing the method according to claim 1, characterized in that that for folding the tape in uniformly large, provided with folds (20) and connected by connecting parts (13) continuously connected individual strips (16) known roller matrices (17, - 19) and one known per se Device (31, 61) are provided for compressing the folds and a counter pin (83) cooperating, reciprocating hammer member (121, 123) is mounted on a stand (87, 89) through which the The apex of the connecting parts of two folds (16) can be deformed to form flat surfaces (22). Fo. 7818 hg / 10/29/68 909825/0329