EP0209450A1 - Machine for forming parallel waves in a plate and for welding each wave at its longitudinal ends - Google Patents

Machine for forming parallel waves in a plate and for welding each wave at its longitudinal ends Download PDF

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Publication number
EP0209450A1
EP0209450A1 EP86401516A EP86401516A EP0209450A1 EP 0209450 A1 EP0209450 A1 EP 0209450A1 EP 86401516 A EP86401516 A EP 86401516A EP 86401516 A EP86401516 A EP 86401516A EP 0209450 A1 EP0209450 A1 EP 0209450A1
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EP
European Patent Office
Prior art keywords
sheet
die
knife
welding
plates
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EP86401516A
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German (de)
French (fr)
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EP0209450B1 (en
Inventor
Maurice Delquié
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Individual
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Priority to AT86401516T priority Critical patent/ATE48250T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/02—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by pressing

Definitions

  • the present invention relates to a / machine for forming, in a sheet, parallel waves and for welding each of these waves at its longitudinal ends.
  • Sheets provided with parallel waves, the lips of which are welded at their ends, are used in particular to constitute walls of submerged electrical transformer.
  • these transformers comprise a tank intended to contain the electrical elements and which is filled with a liquid dielectric which has the double function of isolating the windings traversed by the current and of conveying the calories dissipated by the transformer in operation.
  • the tank is fitted with radiators of various designs. For small powers these radiators are formed by more or less deep and close corrugations, corrugations called waves and forming an integral part of the vertical walls of the tank. This technique is currently the most economical and it is used more and more.
  • a machine of the aforementioned type which comprises a folding die whose imprint has, in cross section, the desired shape for each of the waves to be formed in a sheet.
  • This sheet is brought to pass opposite the matrix and on the side opposite to it is a punch or knife whose cross section is a little smaller than that of the matrix.
  • Means are provided for moving, perpendicular to the sheet, the punch and / or the die so that, as a result of the movement of engagement of the punch in the die, the sheet is folded inside the die forming a wave.
  • the present invention relates to improvements made to such a machine for the purpose of welding together the extreme adjacent lips of the two sides of a wave, in order to laterally close the gap defined by each wave.
  • this machine for forming, in a sheet, parallel waves and for welding each of these waves at its longitudinal ends, comprising, on one side of the sheet, a folding matrix comprising two plates perpendicular to the sheet, delimiting between them a space in which can be engaged a punch or knife perpendicular to the sheet and disposed on the other side thereof, means for causing a relative displacement, perpendicular to the sheet, of the folding die and the knife so as to progressively engage this knife in the folding die and thus to bend the sheet in a U-shape in the matrix to form the wave, is characterized in that the folding die carries, at each of its two lateral ends and on the internal faces opposite its two parallel plates, a pair of cambering members projecting from the internal faces of the two parallel plates of the matrix, the two cambering members of the same pair being available daring outside the passage of the knife in the matrix, on either side of this passage, and delimiting between them an interval substantially equal to twice the thickness of the sheet to pinch between them, during the relative movement of
  • the cambering members preferably consist of balls mounted fixed or mobile in spherical housings formed in the internal faces of the two plates of the folding matrix.
  • the welding means preferably comprise an electric torch carried by the folding die, outside the bending members, the axis of the outlet nozzle of this torch s' extending longitudinally, i.e. parallel to the edge of the wave, towards the nip between the two cambering members and a little in front of the point where the two lips of the flanks of the wave come into contact with each other, between the two bending members.
  • the machine according to the invention offers the advantage that it makes it possible to obtain, in a single operation, wave panels welded at their lateral ends, which saves manufacturing time and space. Furthermore, this complete machine, ensuring both waveforming and welding, has a small volume, its cost price is relatively low and its adjustment is very easy since it suffices to adjust a single machine to vary the dimensions of the wave panel sought.
  • the machine according to the invention is intended to form, in a horizontal sheet 1, successive waves 2, mutually parallel and perpendicular to the plane of the sheet, these waves being able to constitute, for example, fins for cooling a wall d 'a transformer.
  • the machine comprises, as shown in FIGS. 5 to 8, a matrix 3 consisting essentially of two parallel vertical plates 4 and 5, this matrix being arranged, for example, above the sheet 1.
  • a punch or knife 6 which can be fixed and carried by a base 7 as shown in the drawing.
  • Means are provided, in the non-limiting embodiment shown in the drawing, for vertically moving the die 3, so that the fixed knife 6 comes to engage between the parallel vertical plates 4,5 of the die, by arching thus the sheet to form the parallel waves 2.
  • the matrix 3 could be fixed, the knife 6 being mobile or even that the matrix 3 and the punch 6 could both be mobile.
  • the die 3 carries, at each of its lateral ends and on the internal faces 4a and 5a of its two parallel plates 4 and 5, respective cambering members 8 and 9 which, in this non-limiting embodiment, consist of balls.
  • cambering members 8 and 9 which, in this non-limiting embodiment, consist of balls.
  • These balls are mounted fixed or mobile in rotation in spherical housings formed in the internal faces 4a, 5a of the two plates 4,5 of the matrix.
  • the balls 8, 9 are arranged outside the passage of the knife 6 in the matrix 3, on either side of this passage, in order to arch and apply one against the other the two extreme lips 2a and 2b of the two sides of each wave 2.
  • the two balls of the same pair 8 and 9, arranged opposite one another, in the same horizontal plane, are separated from one other so as to delimit between them a width interval substantially equal to twice the thickness of the sheet. Therefore, during the worm movement relative tical of the matrix 3 relative to the knife 6, the two balls 8.9 of each pair of cambering members cause the progressive bringing together and the pinching of the two lips 2a, 2b of the wave 2 as can be better seen in Figures 1 and 3.
  • the machine according to the invention is also provided with means making it possible to ensure the welding of the two lips 2a, 2b practically at the same time as their nipping takes place.
  • These welding means are advantageously constituted by an electric torch 11 which is carried by the matrix 3, outside of the cambering members 8, 9. This torch extends horizontally, its axis being parallel to the edge of the wave 2.
  • the torch 11 is fixed to the vertical core 12a of a support 12 in the form of a yoke whose vertical wings 12b enclose the two plates 4.5 of the matrix 3 and are fixed to the external faces of these plates by means of screws 13.
  • the welding torch 11 comprises an outlet nozzle 14 which extends in the direction of the nip between the two balls 8, 9, a little after the point where the two lips 2a, 2b of the wave 2 come into contact with one another, between the two balls 8 and 9, as can best be seen in FIG. 3. From this fact the welding torch 11 causes the metal to start to melt just a little after the pressure has been applied between the two balls 8 and 9.
  • the machine according to the invention allows to realize, in a single operation, that is to say in a single stroke of the relative movement of the die 3 and the knife 6, the forming wave 2 and welding its lateral lips 2a and 2b.
  • Figures 5 to 8 illustrate the operation of the machine.
  • the sheet 1 rests, upstream of the knife 6 and the die 3, on an electromagnetic plate 15, in the high position, which can be moved vertically by a vertical cylinder 16 carried by a carriage 18 moved horizon nitro by a horizontal jack 17.
  • the sheet 5 rests on a plate 19 movable vertically under the control of a vertical jack 19.
  • the matrix 3 is lowered, under the control of a vertical press cylinder 21, so that its two vertical plates 3,4 come to engage on either side of the vertical knife fixed 6, by arching the sheet 1 so as to form a wave 2 with a straight section in the shape of an inverted U.
  • the sheet is deformed as shown in FIG. 6.
  • the pinching and welding of the lateral wings 2a, 2b takes place, as it has previously explained.
  • the plates 15 and 19 were brought into their low positions, by their respective jacks 16 and 20. Furthermore, the carriage 18 carrying the plate electromagnetic 15 is returned to its "recoil" position under the control of its jack 17 connected to the press jack controlling the descent of the die 3.
  • the press cylinder 21 causes the ascent of the matrix 3 which thus gradually emerges from the wave 2 formed on the knife 6.
  • the press cylinder 21 controls the supply of the cylinders 16 and 20 from the bottom, which causes the electromagnetic plate 15 and the rear plate 19 to rise.
  • These plates 15 and 16 then raise the sheet 1 by disengaging the wave 2 previously formed from the knife 6, as shown in FIG. 8.
  • the jack 17 is then fed by the nose, under the control of the press jack, to move the carriage 18 and the electromagnetic plate 15 in the direction of the knife 6. Because the electromagnetic plate 15 is then excited, it carries with it the sheet 1 to bring it into the starting position, with a view to folding a new wave 2, this position being shown in Figure 5.
  • the cycle can a then start again.

Abstract

A machine for forming parallel corrugations in a metal sheet and for welding each of these corrugations at its longitudinal end, comprises, on the metal sheet side, a bending die comprising two plates perpendicular to the metal sheet defining therebetween a space in which may be engaged a punch or knife perpendicular to the metal sheet. The bending die has, at each of its two lateral ends and on the internal faces opposite its parallel plates, a pair of bending members projecting from the internal faces of the two parallel plates of the die. These two bending members define therebetween a gap substantially equal to twice the thickness of the metal sheet. A welding torch is carried by the bending die and ensures welding of the two lips of the metal sheet in the immediate vicinity of the zone where they are nipped between the bending members.

Description

La présente invention concerne une/machine pour former, dans une tôle, des ondes parallèles et pour souder chacune de ces ondes à ses extrémités longitudinalesdiThe present invention relates to a / machine for forming, in a sheet, parallel waves and for welding each of these waves at its longitudinal ends.

Des tôles pourvues d'onde parallèles dont les lèvres sont soudées à leurs extrémités, sont notamment utilisées pour constituer des parois de transformateur électrique immergé. En effet ces transformateurs comportent une cuve destinée à contenir les éléments électriques et qui est remplie d'un diélectrique liquide qui a la double fonction d'isoler les bobinages parcourus par le courant et de véhiculer les calories dissipées par le transformateur en fonctionnement. Pour évacuer ces calories, la cuve est munie de radiateurs de diverses conceptions. Pour les petites puissances ces radiateurs sont constitués par des ondulations plus ou moins profondes et rapprochées, ondulations appelées ondes et faisant partie intégrante des parois verticales de la cuve. Cette technique est actuellement la plus économique et elle est de plus en plus utilisée.Sheets provided with parallel waves, the lips of which are welded at their ends, are used in particular to constitute walls of submerged electrical transformer. Indeed, these transformers comprise a tank intended to contain the electrical elements and which is filled with a liquid dielectric which has the double function of isolating the windings traversed by the current and of conveying the calories dissipated by the transformer in operation. To remove these calories, the tank is fitted with radiators of various designs. For small powers these radiators are formed by more or less deep and close corrugations, corrugations called waves and forming an integral part of the vertical walls of the tank. This technique is currently the most economical and it is used more and more.

Pour fabriquer ces ondes en panneau on utilise actuellement des chaînes de fabrication semi-automatique, les panneaux à ondes étant fabriqués en plusieurs opérations successives pour obtenir un ensemble soudé et donc étanche. Ces chaînes de fabrication sont très lourdes et onéreuses et réservées à de très gros fabricants.To manufacture these waves in panels, semi-automatic production lines are currently used, the wave panels being manufactured in several successive operations to obtain a welded and therefore waterproof assembly. These production lines are very heavy and expensive and reserved for very large manufacturers.

On connaît par ailleurs, ainsi qu'il est décrit dans le brevet FR-A-2 245 427, une machine du type précité laquelle comporte une matrice de pliage dont l'empreinte présente, en section droite transversale, la forme désirée pour chacune des ondes devant être formées dans une tôle. Cette tôle est amenée à défiler en regard de la matrice et du côté opposé à cette dernière se trouve un poinçon ou couteau dont la section droite est un peu plus petite que celle de la matrice. Des moyens sont prévus pour déplacer, perpendiculairement à la tôle, le poinçon et/ou la matrice de manière que, par suite du mouvement d'engagement du poinçon dans la matrice, la tôle soit pliée à l'intérieur de la matrice en formant une onde.We also know, as described in patent FR-A-2 245 427, a machine of the aforementioned type which comprises a folding die whose imprint has, in cross section, the desired shape for each of the waves to be formed in a sheet. This sheet is brought to pass opposite the matrix and on the side opposite to it is a punch or knife whose cross section is a little smaller than that of the matrix. Means are provided for moving, perpendicular to the sheet, the punch and / or the die so that, as a result of the movement of engagement of the punch in the die, the sheet is folded inside the die forming a wave.

La présente invention concerne des perfectionnements apportés à une telle machine dans le but de souder entre elles les lèvres adjacentes extrêmes des deux flancs d'une onde, afin de fermer latéralement l'intervalle délimité par chaque onde.The present invention relates to improvements made to such a machine for the purpose of welding together the extreme adjacent lips of the two sides of a wave, in order to laterally close the gap defined by each wave.

A cet effet cette machine pour former, dans une tôle, des ondes parallèles et pour souder chacune de ces ondes à ses extrémités longitudinales, comprenant, d'un côté de la tôle, une matrice de pliage comprenant deux plaques perpendiculaires à la tôle, délimitant entre elles un espace dans lequel peut être engagé un poinçon ou couteau perpendiculaire à la tôle et disposé de l'autre côté de celle-ci, des moyens pour provoquer un déplacement relatif, perpendiculairement à la tôle, de la matrice de pliage et du couteau de manière à engager progressivement ce couteau dans la matrice de pliage et à plier ainsi en U la tôle dans la matrice pour former l'onde, est caractérisée en ce que la matrice de pliage porte, à chacune de ses deux extrémités latérales et sur les faces internes en regard de ses deux plaques parallèles, une paire d'organes de cambrage en saillie par rapport aux faces internes des deux plaques parallèles de la matrice, les deux organes de cambrage d'une même paire étant disposés à l'extérieur du passage du couteau dans la matrice, de part et d'autre de ce passage, et délimitant entre eux un intervalle sensiblement égal au double de l'épaisseur de la tôle pour pincer entre eux, lors du mouvement relatif de la matrice et du couteau, les deux lèvres extrêmes en regard des flancs de la tôle, et des moyens de soudage portés par la matrice de pliage et assurant le soudage des deux lèvres de la tôle au voisinage immédiat de la zone de pincement de celles-ci entre les organes de cambrage.For this purpose this machine for forming, in a sheet, parallel waves and for welding each of these waves at its longitudinal ends, comprising, on one side of the sheet, a folding matrix comprising two plates perpendicular to the sheet, delimiting between them a space in which can be engaged a punch or knife perpendicular to the sheet and disposed on the other side thereof, means for causing a relative displacement, perpendicular to the sheet, of the folding die and the knife so as to progressively engage this knife in the folding die and thus to bend the sheet in a U-shape in the matrix to form the wave, is characterized in that the folding die carries, at each of its two lateral ends and on the internal faces opposite its two parallel plates, a pair of cambering members projecting from the internal faces of the two parallel plates of the matrix, the two cambering members of the same pair being available daring outside the passage of the knife in the matrix, on either side of this passage, and delimiting between them an interval substantially equal to twice the thickness of the sheet to pinch between them, during the relative movement of the die and the knife, the two extreme lips facing the sides of the sheet, and the welding means carried by the folding die and ensuring the welding of the two lips of the sheet in the immediate vicinity of the pinching zone of these this between the bending members.

Suivant une caractéristique complémentaire de l'invention les organes de cambrage sont constitués de préférence par des billes montées fixes ou mobiles dans des logements sphériques ménagés dans les faces internes des deux plaques de la matrice de pliage.According to an additional characteristic of the invention, the cambering members preferably consist of balls mounted fixed or mobile in spherical housings formed in the internal faces of the two plates of the folding matrix.

Suivant une autre caractéristique complémentaire de l'invention les moyens de soudage comprennent, de préférence, une torche électrique portée par la matrice de pliage, à l'extérieur des organes de cambrage, l'axe de la buse de sortie de cette torche s'étendant longitudinalement, c'est-à-dire parallèlement à l'arête de l'onde, en direction de la zone de pincement entre les deux organes de cambrage et un peu en avant du point où les deux lèvres des flancs de l'onde viennent en contact l'une avec l'autre, entre les deux organes de cambrage.According to another additional characteristic of the invention, the welding means preferably comprise an electric torch carried by the folding die, outside the bending members, the axis of the outlet nozzle of this torch s' extending longitudinally, i.e. parallel to the edge of the wave, towards the nip between the two cambering members and a little in front of the point where the two lips of the flanks of the wave come into contact with each other, between the two bending members.

La machine suivant l'invention offre l'avantage qu'elle permet d'obtenir en une seule opération des panneaux à ondes soudées à leurs extrémités latérales, d'où un gain de temps de fabrication et d'encombrement. Par ailleurs cette machine complète, assurant à la fois le formagede l'onde et le soudage, a un faible volume, son prix de revient est relativement bas et son réglage est très facile puisqu'il suffit de régler une seule machine pour faire varier les dimensions du panneau à ondes recherché.The machine according to the invention offers the advantage that it makes it possible to obtain, in a single operation, wave panels welded at their lateral ends, which saves manufacturing time and space. Furthermore, this complete machine, ensuring both waveforming and welding, has a small volume, its cost price is relatively low and its adjustment is very easy since it suffices to adjust a single machine to vary the dimensions of the wave panel sought.

On décrira ci-après,à titre d'exemple non limitatif, une forme d'exécution de la présente invention,en référence au dessin annexé sur lequel :

  • La figure 1 est une demi-vue en coupe horizontale schématique de la machine de formage et soudage suivant l'invention.
  • La figure 2 est une vue en coupe verticale et longitudinale par rapport à l'onde, faite suivant la ligne II-II de la figure 1.
  • La figure 3 est une vue en coupe verticale et transversale par rapport à l'onde, faite suivant la ligne III-III de la figure 2.
  • La figure 4 est une vue en perspective partielle d'un panneau à ailettes de refroidissement formées d'ondes parallèles.
  • Les figures 5,6,7 et 8 sont des vues en élévation schématiques illustrant les diverses phases de fabrication d'un panneau à ondes parallèles au moyen de la machine suivant l'invention.
An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the appended drawing in which:
  • Figure 1 is a schematic horizontal sectional half view of the forming and welding machine according to the invention.
  • FIG. 2 is a view in vertical and longitudinal section relative to the wave, taken along line II-II of FIG. 1.
  • FIG. 3 is a view in vertical and transverse section with respect to the wave, taken along line III-III of FIG. 2.
  • Figure 4 is a partial perspective view of a panel with cooling fins formed from parallel waves.
  • Figures 5,6,7 and 8 are schematic elevational views illustrating the various stages of manufacture of a parallel wave panel using the machine according to the invention.

La machine suivant l'invention est destinée à former, dans une tôle horizontale 1, des ondes 2 successives, parallèles entre elles et perpendiculaires au plan de la tôle, ces ondes pouvant constituer, par exemple, des ailettes de refroidissement d'une paroi d'un transformateur. La machine comprend, comme il est représenté sur les figures 5 à 8, une matrice 3 constituée essentiellement de deux plaques verticales parallèles 4 et 5, cette matrice étant disposée, par exemple, au-dessus de la tôle 1. En dessous de la tôle 1 et de la matrice 3 est disposé un poinçon ou couteau 6 qui peut être fixe et porté par un socle 7 comme il est représenté sur le dessin. Des moyens sont prévus, dans la forme d'exécution non limitative représentée sur le dessin, pour déplacer verticalement la matrice 3, de manière que le couteau fixe 6 vienne s'engager entre les plaques verticales parallèles 4,5 de la matrice, en cambrant ainsi la tôle pour former les ondes parallèles 2. Toutefois il est évident que la matrice 3 pourrait être fixe, le couteau 6 étant mobile ou bien encore que la matrice 3 et le poinçon 6 pourraient être tous les deux mobiles.The machine according to the invention is intended to form, in a horizontal sheet 1, successive waves 2, mutually parallel and perpendicular to the plane of the sheet, these waves being able to constitute, for example, fins for cooling a wall d 'a transformer. The machine comprises, as shown in FIGS. 5 to 8, a matrix 3 consisting essentially of two parallel vertical plates 4 and 5, this matrix being arranged, for example, above the sheet 1. Below the sheet 1 and the die 3 is disposed a punch or knife 6 which can be fixed and carried by a base 7 as shown in the drawing. Means are provided, in the non-limiting embodiment shown in the drawing, for vertically moving the die 3, so that the fixed knife 6 comes to engage between the parallel vertical plates 4,5 of the die, by arching thus the sheet to form the parallel waves 2. However, it is obvious that the matrix 3 could be fixed, the knife 6 being mobile or even that the matrix 3 and the punch 6 could both be mobile.

Si on se réfère maintenant plus particulièrement aux figures 1 à 3, on peut voir que la matrice 3 porte, à chacune de ses extrémités latérales et sur les faces internes 4a et 5a de ses deux plaques parallèles 4 et 5, des organes de cambrage respectifs 8 et 9 qui, dans cette forme d'exécution non limitative, sont constitués par des billes. Ces billes sont montées fixes ou mobiles en rotation dans des logements sphériques ménagés dans les faces internes 4a,5a des deux plaques 4,5 de la matrice. Les billes 8,9 sont disposées à l'extérieur du passage du couteau 6 dans la matrice 3, de part et d'autre de ce passage, afin de cambrer et d'appliquer l'une contre l'autre les deux lèvres extrêmes 2a et 2b des deux flancs de chaque onde 2. A cet effet les deux billes d'une même paire 8 et 9, disposées en regard l'une de l'autre, dans un même plan horizontal, sont écartées l'une de l'autre de manière à délimiter entre elles un intervalle de largeur sensiblement égale au double de l'épaisseur de la tôle. De ce fait, lors du mouvement vertical relatif de la matrice 3 par rapport au couteau 6, les deux billes 8,9 de chaque paire d'organes de cambrage provoquent le rapprochement progressif et le pincement des deux lèvres 2a,2b de l'onde 2 comme on peut mieux le voir sur les figures 1 et 3.If we now refer more particularly to Figures 1 to 3, we can see that the die 3 carries, at each of its lateral ends and on the internal faces 4a and 5a of its two parallel plates 4 and 5, respective cambering members 8 and 9 which, in this non-limiting embodiment, consist of balls. These balls are mounted fixed or mobile in rotation in spherical housings formed in the internal faces 4a, 5a of the two plates 4,5 of the matrix. The balls 8, 9 are arranged outside the passage of the knife 6 in the matrix 3, on either side of this passage, in order to arch and apply one against the other the two extreme lips 2a and 2b of the two sides of each wave 2. For this purpose the two balls of the same pair 8 and 9, arranged opposite one another, in the same horizontal plane, are separated from one other so as to delimit between them a width interval substantially equal to twice the thickness of the sheet. Therefore, during the worm movement relative tical of the matrix 3 relative to the knife 6, the two balls 8.9 of each pair of cambering members cause the progressive bringing together and the pinching of the two lips 2a, 2b of the wave 2 as can be better seen in Figures 1 and 3.

La machine suivant l'invention est pourvue également de moyens permettant d'assurer le soudage des deux lèvres 2a,2b pratiquement en même temps qu'a lieu leur pincement. Ces moyens de soudage sont avantageusement constitués par une torche électrique 11 qui est portée par la matrice 3, à l'extérieur des organes de cambrage 8,9. Cette torche s'étend horizontalement, son axe étant parallèle à l'arête de l'onde 2. La torche 11 est fixée à l'âme verticale 12a d'un support 12 en forme de chape dont les ailes verticales 12b enserrent les deux plaques 4,5 de la matrice 3 et sont fixées aux faces externes de ces plaques au moyen de vis 13. La torche de soudage 11 comporte une buse de sortie 14 qui s'étend en direction de la zone de pincement entre les deux billes 8,9, un peu après le point où les deux lèvres 2a,2b de l'onde 2 viennent en contact l'une avec l'autre, entre les deux billes 8 et 9, comme on peut mieux le voir sur la figure 3. De ce fait la torche de soudage 11 provoque le début de la fusion du métal juste un peu après l'application de la pression entre les deux billes 8 et 9.The machine according to the invention is also provided with means making it possible to ensure the welding of the two lips 2a, 2b practically at the same time as their nipping takes place. These welding means are advantageously constituted by an electric torch 11 which is carried by the matrix 3, outside of the cambering members 8, 9. This torch extends horizontally, its axis being parallel to the edge of the wave 2. The torch 11 is fixed to the vertical core 12a of a support 12 in the form of a yoke whose vertical wings 12b enclose the two plates 4.5 of the matrix 3 and are fixed to the external faces of these plates by means of screws 13. The welding torch 11 comprises an outlet nozzle 14 which extends in the direction of the nip between the two balls 8, 9, a little after the point where the two lips 2a, 2b of the wave 2 come into contact with one another, between the two balls 8 and 9, as can best be seen in FIG. 3. From this fact the welding torch 11 causes the metal to start to melt just a little after the pressure has been applied between the two balls 8 and 9.

On voit, d'après ce qui précède, que la machine suivant l'invention permet de réaliser, en une seule opération, c'est-à-dire en une seule course du mouvement relatif de la matrice 3 et du couteau 6, le formage de l'onde 2 et le soudage de ses lèvres latérales 2a et 2b.We see, from the above, that the machine according to the invention allows to realize, in a single operation, that is to say in a single stroke of the relative movement of the die 3 and the knife 6, the forming wave 2 and welding its lateral lips 2a and 2b.

Les figures 5 à 8 illustrent le fonctionnement de la machine. En position de départ, qui est celle représentée sur la figure 5, la tôle 1 repose, en amont du couteau 6 et de la matrice 3, sur un plateau électromagnétique 15, en position haute, qui peut être déplacé verticalement par un vérin vertical 16 porté par un chariot 18 déplacé horizontalement par un vérin horizontal 17. En aval de la matrice 3 et du couteau 6 la tôle 5 repose sur un plateau 19 mobile verticalement sous la commande d'un vérin vertical 19.Figures 5 to 8 illustrate the operation of the machine. In the starting position, which is that shown in Figure 5, the sheet 1 rests, upstream of the knife 6 and the die 3, on an electromagnetic plate 15, in the high position, which can be moved vertically by a vertical cylinder 16 carried by a carriage 18 moved horizon talement by a horizontal jack 17. Downstream of the die 3 and the knife 6 the sheet 5 rests on a plate 19 movable vertically under the control of a vertical jack 19.

Pour le formage d'une onde 2, la matrice 3 est abaissée, sous le commande d'un vérin de presse vertical 21, de manière que ses deux plaques verticales 3,4 viennent s'engager de part et d'autre du couteau vertical fixe 6, en cambrant la tôle 1 de manière à former une onde 2 à section droite en forme de U inversé. En fin de descente de la matrice 3 la tôle se trouve déformée ainsi qu'il est représenté sur la figure 6. Pendant ce mouvement de descente de la matrice 3 a lieu le pincement et le soudage des ailes latérales 2a,2b, comme il a été expliqué précédemment. Avant qu'ait lieu la déformation de la tôle 1, pour la formation de l'onde 2, les plateaux 15 et 19 ont été amenés dans leurs positions basses, par leurs vérins respectifs 16 et 20. Par ailleurs le chariot 18 portant le plateau électromagnétique 15 est ramené à sa position "recul" sous la commande de son vérin 17 relié au vérin de presse commandant la descente de la matrice 3.For the formation of a wave 2, the matrix 3 is lowered, under the control of a vertical press cylinder 21, so that its two vertical plates 3,4 come to engage on either side of the vertical knife fixed 6, by arching the sheet 1 so as to form a wave 2 with a straight section in the shape of an inverted U. At the end of the descent of the matrix 3 the sheet is deformed as shown in FIG. 6. During this movement of descent of the matrix 3 the pinching and welding of the lateral wings 2a, 2b takes place, as it has previously explained. Before the deformation of the sheet 1 takes place, for the formation of the wave 2, the plates 15 and 19 were brought into their low positions, by their respective jacks 16 and 20. Furthermore, the carriage 18 carrying the plate electromagnetic 15 is returned to its "recoil" position under the control of its jack 17 connected to the press jack controlling the descent of the die 3.

Une fois le cambrage de la tôle 1 pour la formation de l'onde 2 et le soudage des lèvres 2a,2b de cette onde réalisés, le vérin de presse 21 provoque la remontée de la matrice 3 qui se dégage ainsi progressivement de l'onde 2 formée sur le couteau 6. En fin de course ascendante le vérin de presse 21 commande l'alimentation des vérins 16 et 20 par le fond, ce qui provoque la montée du plateau électromagnétique 15 et celle du plateau arrière 19. Ces plateaux 15 et 16 soulèvent alors la tôle 1 en désengageant l'onde 2 précédemment formée du couteau 6, comme il est représenté sur la figure 8. Le vérin 17 est alors alimenté par le nez, sous la commande du vérin de presse, pour déplacer le chariot 18 et le plateau électromagnétique 15 en direction du couteau 6. Du fait que le plateau électromagnétique 15 est alors excité, il entraîne avec lui la tôle 1 pour l'amener en position de départ, en vue du pliage d'une nouvelle onde 2, cette position étant représenté sur la figure 5. Le cycle peut alors recommencer.Once the bending of the sheet 1 for the formation of the wave 2 and the welding of the lips 2a, 2b of this wave made, the press cylinder 21 causes the ascent of the matrix 3 which thus gradually emerges from the wave 2 formed on the knife 6. At the end of the upward stroke, the press cylinder 21 controls the supply of the cylinders 16 and 20 from the bottom, which causes the electromagnetic plate 15 and the rear plate 19 to rise. These plates 15 and 16 then raise the sheet 1 by disengaging the wave 2 previously formed from the knife 6, as shown in FIG. 8. The jack 17 is then fed by the nose, under the control of the press jack, to move the carriage 18 and the electromagnetic plate 15 in the direction of the knife 6. Because the electromagnetic plate 15 is then excited, it carries with it the sheet 1 to bring it into the starting position, with a view to folding a new wave 2, this position being shown in Figure 5. The cycle can a then start again.

Claims (5)

1.- Machine pour former, dans une tôle, des ondes parallèles et pour souder chacune de ces ondes à ses extrémités longitudinales, comprenant, d'un côté de la tôle, une matrice de pliage comprenant deux plaques perpendiculaires à la tôle, délimitant entre elles un espace dans lequel peut être engagé un poinçon ou couteau perpendiculaire à la tôle et disposé de l'autre côté de celle-ci, des moyens pour provoquer un déplacement relatif, perpendiculairement à la tôle, de la matrice de pliage et du couteau de manière à engager progressivement ce couteau dans la matrice de pliage et à plier ainsi en U la tôle dans la matrice pour former l'onde, caractérisée en ce que la matrice de pliage (3) porte, à chacune de ses deux extrémités latérales et sur les faces internes (4a,5a) en regard de ses deux plaques parallèles (4,5) , une paire d'organes de cambrage (8,9) en saillie par rapport aux faces internes (4a,5a) des deux plaques parallèles (4,5) de la matrice, les deux organes de cambrage (8,9) d'une même paire étant disposés à l'extérieur du passage du couteau (6) dans la matrice (3), de part et d'autre de ce passage et délimitant entre eux un intervalle sensiblement égal au double de l'épaisseur de la tôle pour pincer entre eux, lors du mouvement relatif de la matrice (3) et du couteau (6), les deux lèvres extrêmes (2a,2b) en regard des flancs de la tôle, et des moyens de soudage (11) portés par la matrice de pliage (3) et assurant le soudage des deux lèvres (2e,2b) de la tôle au voisinage immédiat de la zone de pincement de celles-ci entre les organes de cambrage (8,9).1.- Machine for forming, in a sheet, parallel waves and for welding each of these waves at its longitudinal ends, comprising, on one side of the sheet, a folding matrix comprising two plates perpendicular to the sheet, delimiting between they a space in which can be engaged a punch or knife perpendicular to the sheet and arranged on the other side thereof, means for causing a relative displacement, perpendicular to the sheet, of the folding die and the knife so as to progressively engage this knife in the folding die and thus bend the sheet in a U-shape in the die to form the wave, characterized in that the folding die (3) carries, at each of its two lateral ends and on the internal faces (4a, 5a) facing its two parallel plates (4,5), a pair of cambering members (8,9) projecting from the internal faces (4a, 5a) of the two parallel plates ( 4,5) of the matrix, the two cambering bodies (8,9) of the same pair being arranged outside the passage of the knife (6) in the matrix (3), on either side of this passage and delimiting between them an interval substantially equal to twice the thickness of the sheet to pinch between them, during the relative movement of the die (3) and the knife (6), the two end lips (2a, 2b) facing the sides of the sheet, and welding means (11) carried by the folding die (3) and ensuring the welding of the two lips (2e, 2b) of the sheet in the immediate vicinity of the nip thereof between the bending members (8, 9). 2.- Machine suivant la revendication 1 caractérisée en ce que les organes de cambrage (8,9) sont constitués par des billes montées fixes ou mobiles dans des logements sphériques ménagés dans les faces internes (4a,5a) des deux plaques (4,5) de la matrice de pliage (3).2. Machine according to claim 1, characterized in that the cambering members (8, 9) consist of balls mounted fixed or mobile in spherical housings formed in the internal faces (4a, 5a) of the two plates (4, 5) of the folding die (3). 3.- Machine suivant l'une quelconque des revendications précédentes caractérisée en ce que les moyens de soudage comprennent une torche électrique(11) portée par la matrice de pliage (3), à l'extérieur des organes de cambrage (8,9), l'axe de la buse de sortie (14) de cette torche (11) s'étendant longitudinalement, c'est-à-dire parallèlement à l'arête de l'onde (2), en direction de la zone de pincement entre les deux organes de cambrage (8,9) et un peu après le point où les deux lèvres (2a,2b) des flancs de l'onde viennent en contact l'une avec l'autre, entre les deux organes de cambrage (8,9).3.- Machine according to any one of the preceding claims, characterized in that the welding means comprise an electric torch (11) carried by the folding die (3), outside the bending members (8,9), the axis of the outlet nozzle (14) of this torch (11) extending longitudinally, that is to say parallel to the edge of the wave (2), in the direction of the nip between the two cambering members (8,9) and a little after the point where the two lips (2a, 2b) of the flanks of the wave come into contact with each other, between the two cambering members (8,9). 4.- Machine suivant la revendication 3 caractérisée en ce que la torche (11) est fixée à l'âme verticale (12a) d'un support (12) en forme de chape dont les ailes verticales (12b) enserrent les deux plaques (4,5) de la matrice (3) et sont fixées aux faces externes de ces plaques au moyen de vis (13).4.- Machine according to claim 3 characterized in that the torch (11) is fixed to the vertical core (12a) of a support (12) in the form of a yoke whose vertical wings (12b) enclose the two plates ( 4,5) of the matrix (3) and are fixed to the external faces of these plates by means of screws (13). 5.- Machine suivant l'une quelconque des revendications précédentes caractérisée en ce qu'en position de départ, la tôle (1) repose, en amont du couteau (6) et de la matrice (3), sur un plateau électromagnétique (15), en position haute, qui peut être déplacé verticalement par un vérin vertical (16) porté par un chariot (18) déplacé horizontalement par un vérin horizontal (17), et en aval de la matrice (3) et du couteau (6) la tôle (5) repose sur un plateau (19) mobile verticalement sous la commande d'un vérin vertical (19).5.- Machine according to any one of the preceding claims, characterized in that in the starting position, the sheet (1) rests, upstream of the knife (6) and the die (3), on an electromagnetic plate (15 ), in the high position, which can be moved vertically by a vertical cylinder (16) carried by a carriage (18) moved horizontally by a horizontal cylinder (17), and downstream of the die (3) and the knife (6) the sheet (5) rests on a plate (19) movable vertically under the control of a vertical cylinder (19).
EP86401516A 1985-07-12 1986-07-08 Machine for forming parallel waves in a plate and for welding each wave at its longitudinal ends Expired EP0209450B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401516T ATE48250T1 (en) 1985-07-12 1986-07-08 DEVICE FOR FORMING PARALLEL SHAFT IN A PLATE AND FOR WELDING EACH OF THESE SHAFT AT THEIR LENGTHS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8510754 1985-07-12
FR8510754A FR2584632B1 (en) 1985-07-12 1985-07-12 MACHINE FOR FORMING PARALLEL WAVES IN A SHEET AND FOR WELDING EACH OF THESE WAVES AT ITS LONGITUDINAL ENDS

Publications (2)

Publication Number Publication Date
EP0209450A1 true EP0209450A1 (en) 1987-01-21
EP0209450B1 EP0209450B1 (en) 1989-11-29

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EP86401516A Expired EP0209450B1 (en) 1985-07-12 1986-07-08 Machine for forming parallel waves in a plate and for welding each wave at its longitudinal ends

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US (1) US4758706A (en)
EP (1) EP0209450B1 (en)
AT (1) ATE48250T1 (en)
DE (1) DE3667150D1 (en)
FR (1) FR2584632B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI100317B (en) * 1994-05-04 1997-11-14 Vahterus Oy Method and apparatus for welding sheet metal

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE601234C (en) * 1934-08-10 Siemens Schuckertwerke Akt Ges Press die for the production of corrugated iron walls from sheet metal
FR1294242A (en) * 1961-04-12 1962-05-26 Comp Generale Electricite Calender plate crimping machine
DE1452728A1 (en) * 1962-04-16 1969-03-27 Licentia Gmbh Process for the production of preferably deep waves in sheet metal
DE1552021B1 (en) * 1962-05-08 1971-03-04 Licentia Gmbh Device for welding face-up cooling pockets for deep-wave boiler walls of liquid-cooled transformers
FR2057236A5 (en) * 1969-08-07 1971-05-21 Le Transformateur Continuously folded strip metal used for - transformer housing walls
FR2517579A1 (en) * 1981-12-08 1983-06-10 Soudure Autogene Francaise Fabrication of ribbed sheet steel panels - uses intermittent feed to pass strip via folding, edge welding and cutting posts at intervals
DE3310681A1 (en) * 1982-03-29 1983-10-06 Vyzk Ustav Silnoproude Elekt Tool for manufacturing ribbed sheet-metal casings

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE755074A (en) * 1968-01-10 1971-02-01 Menk Apparatebau Gmbh Welding the edge of corrugated sheet metal
SU735343A1 (en) * 1977-06-08 1980-05-25 Московский Ордена Трудового Красного Знамени Институт Стали И Сплавов Arrangement for advancing mandrel rod

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE601234C (en) * 1934-08-10 Siemens Schuckertwerke Akt Ges Press die for the production of corrugated iron walls from sheet metal
FR1294242A (en) * 1961-04-12 1962-05-26 Comp Generale Electricite Calender plate crimping machine
DE1452728A1 (en) * 1962-04-16 1969-03-27 Licentia Gmbh Process for the production of preferably deep waves in sheet metal
DE1552021B1 (en) * 1962-05-08 1971-03-04 Licentia Gmbh Device for welding face-up cooling pockets for deep-wave boiler walls of liquid-cooled transformers
FR2057236A5 (en) * 1969-08-07 1971-05-21 Le Transformateur Continuously folded strip metal used for - transformer housing walls
FR2517579A1 (en) * 1981-12-08 1983-06-10 Soudure Autogene Francaise Fabrication of ribbed sheet steel panels - uses intermittent feed to pass strip via folding, edge welding and cutting posts at intervals
DE3310681A1 (en) * 1982-03-29 1983-10-06 Vyzk Ustav Silnoproude Elekt Tool for manufacturing ribbed sheet-metal casings

Also Published As

Publication number Publication date
ATE48250T1 (en) 1989-12-15
EP0209450B1 (en) 1989-11-29
DE3667150D1 (en) 1990-01-04
US4758706A (en) 1988-07-19
FR2584632A1 (en) 1987-01-16
FR2584632B1 (en) 1989-11-17

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