FR2709083A1 - Sheet blank of multilayer structure, with improved deep-drawability and weldability, and device for manufacturing this type of sheet blank - Google Patents
Sheet blank of multilayer structure, with improved deep-drawability and weldability, and device for manufacturing this type of sheet blank Download PDFInfo
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- FR2709083A1 FR2709083A1 FR9310014A FR9310014A FR2709083A1 FR 2709083 A1 FR2709083 A1 FR 2709083A1 FR 9310014 A FR9310014 A FR 9310014A FR 9310014 A FR9310014 A FR 9310014A FR 2709083 A1 FR2709083 A1 FR 2709083A1
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- metal sheets
- sheet blank
- sheet
- edges
- multilayer structure
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/06—Resistance welding; Severing by resistance heating using roller electrodes
- B23K11/061—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams
- B23K11/062—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams for welding longitudinal seams of tubes
- B23K11/063—Lap welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
- B23K2103/166—Multilayered materials
- B23K2103/172—Multilayered materials wherein at least one of the layers is non-metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/56—Damping, energy absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
- B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2509/00—Household appliances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
- B32B2605/08—Cars
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
Description
La présente invention a pour objet un flan de tôle de structure multicouche, dit tôle sandwich, à soudabilité et emboutissabilité améliorées. The subject of the present invention is a sheet blank of a multilayer structure, called a sandwich sheet, with improved weldability and stampability.
La présente invention a également pour objet un procédé et un dispositif de fabrication de ce type de flans de tôle. The present invention also relates to a method and a device for manufacturing this type of sheet blanks.
Les flans de tôle à structure multicouche ont des propriétés d'amortissement des vibrations qui sont mises à profit en particulier pour réduire la propagation du bruit. Sheet blanks with a multilayer structure have vibration damping properties which are used in particular to reduce the propagation of noise.
Ce type de flans de tôle est utilisé par exemple pour la fabrication d'éléments de carrosserie de véhicules automobiles ou de panneaux d'habillage d'appareils ménagers. This type of sheet metal blanks is used for example for the manufacture of bodywork elements for motor vehicles or panels for covering household appliances.
A cet effet, les flans de tôle de structure multicouche comportent deux tôles métalliques externes appelées également parements et une couche de polymère intercalée entre lesdites tôles métalliques. To this end, the sheet blanks of multilayer structure comprise two external metal sheets also called facings and a layer of polymer interposed between said metal sheets.
Pour pouvoir souder ces flans de tôle de structure multicouche, le polymère constituant cette couche est chargé d'un matériau conducteur, comme par exemple des billes de nickel permettant d'assurer la continuité électrique entre les deux tôles métalliques externes. In order to be able to weld these sheet blanks of multilayer structure, the polymer constituting this layer is charged with a conductive material, such as for example nickel balls making it possible to ensure electrical continuity between the two external metal sheets.
Mais, ce type de flans de tôle à structure multicouche pose encore des problèmes au moment de leur soudage ou au moment de leur emboutissage. However, this type of sheet blanks with a multilayer structure still poses problems when they are welded or when they are stamped.
En effet, lors du soudage à l'arc, la couche de polymère se décompose et crée des vapeurs entraînant des porosités du joint soudé et lors du soudage par points, par exemple à la molette, les caractéristiques d'isolant électrique de la couche de polymère réduisent les latitudes de soudage. Indeed, during arc welding, the polymer layer decomposes and creates vapors causing porosities of the welded joint and during spot welding, for example with a seam, the electrical insulating characteristics of the layer of polymers reduce the welding latitudes.
D'autre part, dans le domaine de l'automobile, si un panneau soudé et réalisé à partir d'un flan de tôle à structure multicouche doit être remplacé, ce panneau est découpé par exemple au chalumeau ce qui a pour effet de brûler la couche de polymère sur le reste du panneau. On the other hand, in the automotive field, if a welded panel made from a sheet metal blank with a multilayer structure must be replaced, this panel is cut for example with a torch which has the effect of burning the layer of polymer on the rest of the panel.
La disparition de la couche de polymère crée des espaces libres entre les deux tôles métalliques externes pouvant entraîner des points de corrosion. The disappearance of the polymer layer creates free spaces between the two external metal sheets which can cause corrosion points.
De plus, lors de l'emboutissage de ce type de flans de tôle, les deux tôles métalliques risquent de glisser l'une par rapport à l'autre et de se désolidariser de la couche de polymère entraînant ainsi la formation de plis. In addition, during the stamping of this type of sheet blanks, the two metal sheets may slip relative to one another and become detached from the polymer layer thus causing the formation of folds.
L'invention a pour but de proposer un flan de tôle à structure multicouche qui permet d'éviter ces inconvénients. The object of the invention is to propose a sheet blank with a multilayer structure which makes it possible to avoid these drawbacks.
A cet effet, l'invention a pour objet un flan de tôle de structure multicouche, dit tôle sandwich, du type comportant deux tôles métalliques externes et une couche de polymère, chargé d'un matériau conducteur électrique, comme par exemple des billes de nickel, intercalée entre lesdites tôles métalliques, caractérisé en ce que les bords des tôles métalliques externes sont soudés entre eux sur tout ou partie du pourtour du flan de tôle. To this end, the subject of the invention is a sheet blank of multilayer structure, called sandwich sheet, of the type comprising two external metal sheets and a layer of polymer, charged with an electrically conductive material, such as for example nickel beads. , sandwiched between said metal sheets, characterized in that the edges of the external metal sheets are welded together over all or part of the periphery of the sheet blank.
Les bords des tôles métalliques externes sont soudés entre eux sur une largeur comprise entre 5 et 20mm. The edges of the external metal sheets are welded together over a width of between 5 and 20mm.
L'invention a également pour objet un procédé de fabrication d'un flan de tôle de structure multicouche, dit tôle sandwich, du type comportant deux tôles métalliques externes et une couche de polymère intercalée entre lesdites tôles métalliques, caractérisé en ce que:
- on maintient le flan de tôle pour éviter le glissement des tôles métalliques par rapport à la couche de polymère,
- on applique sur un des bords des faces externes des tôles métalliques au moins deux molettes électriquement conductrices, placées en regard l'une de l'autre, de telle façon que chaque molette repose par au moins une portion de sa surface de contact sur la face externe de l'une desdites tôles métalliques,
- on alimente électriquement les molettes et on exerce par l'intermédiaire des molettes un effort de serrage sur la zone du bord des tôles métalliques situées entre lesdites molettes pour fondre la couche de polymère dans lesdites zones,
- puis on déplace lesdites molettes sur le pourtour du flan de tôle pour souder les bords des tôles métalliques entre eux sur tout ou partie dudit pourtour et sur une largeur déterminée.The subject of the invention is also a method of manufacturing a sheet blank of a multilayer structure, known as a sandwich sheet, of the type comprising two external metal sheets and a layer of polymer interposed between said metal sheets, characterized in that:
- the sheet blank is maintained to avoid sliding of the metal sheets relative to the polymer layer,
- At least two electrically conductive rollers, placed facing each other, are applied to one of the edges of the external faces of the metal sheets, so that each roll rests on at least one portion of its contact surface on the external face of one of said metal sheets,
the wheels are electrically supplied and a clamping force is exerted on the area of the edge of the metal sheets located between said wheels to melt the polymer layer in said areas,
- Then moving said wheels on the periphery of the sheet blank to weld the edges of the metal sheets together over all or part of said periphery and over a determined width.
Selon une autre caractéristique de l'invention, on soude entre eux les bords des tôles métalliques externe sur une largeur comprise entre 5 et 20 mm. According to another characteristic of the invention, the edges of the external metal sheets are welded together over a width of between 5 and 20 mm.
L'invention a aussi pour objet un dispositif de fabrication d'un flan de tôle de structure multicouche, dit tôle sandwich, pour la mise en oeuvre du procédé mentionné ci-dessus, caractérisé en ce qu'il comprend
- au moins deux molettes électriquement conductrices placées en regard l'une de l'autre et comportant chacune au moins une portion de sa surface de contact destinée à être appliquée sur un des bords des faces externes des tôles métalliques,
- des moyens de maintien du flan de tôle,
- des moyens d'alimentation électrique des molettes,
- des moyens pour exercer un effort de serrage par l'intermédiaire des molettes sur la zone du bord des tôles métalliques située entre lesdites molet tes,
- des moyens d'entraînement en rotation de chacune des molettes,
- et des moyens de déplacement des molettes sur le pourtour du flan de tôle pour souder les bords des tôles métalliques entre eux sur tout ou partie dudit pourtour.The subject of the invention is also a device for manufacturing a sheet blank of a multilayer structure, called a sandwich sheet, for implementing the method mentioned above, characterized in that it comprises
- at least two electrically conductive knurls placed opposite one another and each comprising at least a portion of its contact surface intended to be applied to one of the edges of the external faces of the metal sheets,
means for holding the sheet blank,
means of electrical supply of the rollers,
means for exerting a clamping force by means of the knurls on the zone of the edge of the metal sheets situated between the said knurls,
means for driving each of the wheels in rotation,
- And means for moving the rollers on the periphery of the sheet blank to weld the edges of the metal sheets together over all or part of said periphery.
Selon d'autres caractéristiques de l'invention
- chaque mollette comporte un rebord périphérique en relief pour le guidage de ladite molette sur le pourtour du flan de tôle,
- le rebord périphérique en relief est en matériau isolant.According to other features of the invention
each wheel has a raised peripheral rim for guiding said wheel on the periphery of the sheet blank,
- the peripheral raised edge is made of insulating material.
D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés, sur lesquels:
- la Fig. 1 est une vue en coupe transversale d'un flan de tôle à structure multicouche selon l'invention,
- la Fig. 2 est une vue schématique en perspective du dispositif de fabrication d'un flan de tôle à structure multicouche selon l'invention,
Sur la Fig. 1, on a représenté en coupe transversale un flan de tôle 1 à structure multicouche, dit tôle sandwich, à soudabilité et à emboutissabilité améliorées, obtenu par le procédé selon l'invention.Other characteristics and advantages of the present invention will become apparent during the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
- Fig. 1 is a cross-sectional view of a sheet blank with a multilayer structure according to the invention,
- Fig. 2 is a schematic perspective view of the device for manufacturing a sheet blank with a multilayer structure according to the invention,
In Fig. 1, there is shown in cross section a sheet blank 1 with a multilayer structure, said sandwich sheet, with improved weldability and stampability, obtained by the method according to the invention.
Le flan de tôle I comporte une première tôle métallique externe 2 et une seconde tôle métallique externe 3. The sheet metal blank I comprises a first external metal sheet 2 and a second external metal sheet 3.
Une couche de polymère 4 chargée d'un matériau conducteur électrique, comme par exemple des billes de nickel est intercalée entre les deux tôles métalliques 2 et 3 de façon à former une structure multicouche. A polymer layer 4 charged with an electrically conductive material, such as for example nickel beads, is interposed between the two metal sheets 2 and 3 so as to form a multilayer structure.
Les bords, respectivement 2a et 3a, des tôles métalliques externes 2 et 3 sont soudés entre eux sur tout ou partie du pourtour du flan de tôle 1 et sur une largeur déterminée. The edges, respectively 2a and 3a, of the external metal sheets 2 and 3 are welded together over all or part of the periphery of the sheet blank 1 and over a determined width.
En effet, il peut être intéressant de ne souder entre eux les deux tôles métalliques externes 2 et 3 que sur une partie de leur pourtour, en particulier, celle qui servira à assembler par soudage ledit flan de tôle sur le reste de la structure auquel il est destiné. Indeed, it may be advantageous to weld together the two external metal sheets 2 and 3 only over part of their periphery, in particular, that which will be used to assemble by welding said sheet blank to the rest of the structure to which it is destined.
Grâce à la présence de ce pourtour du flan de tôle ou de la partie du pourtour du flan de tôle où les deux tôles métalliques externes 2 et 3 sont soudées entre elles sans présence de polymère, il est possible d'assembler le flan de tôle selon l'invention sur la structure pour laquelle il est destiné sans précaution particulière, c'est à dire en utilisant des procédés de soudage classiques. Thanks to the presence of this periphery of the sheet blank or of the portion of the periphery of the sheet blank where the two external metal sheets 2 and 3 are welded together without the presence of polymer, it is possible to assemble the sheet blank according to the invention on the structure for which it is intended without particular precautions, that is to say using conventional welding methods.
La seule contrainte est la largeur de la zone soudée des bords 2a et 3a du flan de tôle. The only constraint is the width of the welded area of the edges 2a and 3a of the sheet blank.
Avantageusement, cette largeur doit être comprise entre 5 et 20mm selon le procédé de soudage ultérieur utilisé. Advantageously, this width must be between 5 and 20 mm depending on the subsequent welding process used.
Si le flan de tôle selon l'invention est destiné à être assemblé à une structure par soudage à la molette, un rebord soudé de 5 à 7mm est suffisant. If the sheet blank according to the invention is intended to be assembled to a structure by seam welding, a welded flange of 5 to 7mm is sufficient.
Si le flan de tôle selon l'invention est destiné à être assemblé par soudage par résistance par points, il faut prévoir un rebord soudé de 8 à 12mm. If the sheet blank according to the invention is intended to be assembled by resistance resistance spot welding, a welded flange of 8 to 12mm must be provided.
Si le flan de tôle selon l'invention est destiné à être assemblé par soudage à l'arc, il faut un rebord soudé de 12 à 20mm. If the sheet blank according to the invention is intended to be assembled by arc welding, a welded flange of 12 to 20 mm is required.
Le soudage des bords 2a et 3a des tôles métalliques 2 et 3 est obtenu par un échauffement local et une compression desdits bords pour fondre et provoquer le fluage de la couche de polymère 4 sur le pourtour du flan de tôle 1 afin de réaliser ce soudage. The welding of the edges 2a and 3a of the metal sheets 2 and 3 is obtained by local heating and compression of the said edges to melt and cause the creep of the polymer layer 4 around the periphery of the sheet blank 1 in order to carry out this welding.
Pour cela, le dispositif de fabrication d'un tel flan de tôle 1 à structure multicouche comporte, comme représenté à la Fig. 2, deux molettes 10 et 11 électriquement conductrices de forme circulaire. For this, the device for manufacturing such a sheet blank 1 with a multilayer structure comprises, as shown in FIG. 2, two electrically conductive knobs 10 and 11 of circular shape.
Chaque molette 10 et 11 est portée par un arbre d'entraînement, respectivement 12 et 13, accouplé à un moteur, non représenté, d'entraînement en rotation de chacune desdites mollettes 10 et Il afin de déplacer ces molettes à une vitesse linéaire déterminée sur les bords 2a et 3a du flan de tôle I et le long du pourtour dudit flan de tôle 1. Each wheel 10 and 11 is carried by a drive shaft, respectively 12 and 13, coupled to a motor, not shown, for driving in rotation each of said knobs 10 and II in order to move these wheels at a determined linear speed over the edges 2a and 3a of the sheet blank I and along the periphery of said sheet blank 1.
Les arbres 12 et 13 sont reliés électriquement par une connexion électrique 14 et 15 alimentée par un générateur 16 et qui se prolonge axialement dans lesdits arbres 12 et 13 jusqu'aux molettes 10 et 11 réalisées en un matériau conducteur tel que le cuivre. The shafts 12 and 13 are electrically connected by an electrical connection 14 and 15 supplied by a generator 16 and which extends axially in said shafts 12 and 13 up to the knobs 10 and 11 made of a conductive material such as copper.
Les deux molettes 10 et 11 sont disposées de part et d'autre du flan de tôle 1 et en regard l'une de l'autre. The two knobs 10 and 11 are arranged on either side of the sheet blank 1 and facing one another.
Ainsi, la molette supérieure 10 est placée en regard de la face externe de la tôle métallique 2 et la molette inférieure 11 est placée en regard de la face externe de la tôle métallique 3. Thus, the upper wheel 10 is placed opposite the external face of the metal sheet 2 and the lower wheel 11 is placed opposite the external face of the metal sheet 3.
Les molettes 10 et 11 peuvent être déplacées l'une vers l'autre ou écartées l'une de l'autre par des moyens de déplacement, non représentés, constitués par exemple par des vérins hydrauliques. The knobs 10 and 11 can be moved towards one another or separated from one another by displacement means, not shown, constituted for example by hydraulic jacks.
D'autre part, le dispositif comprend un banc de bridage 20 destiné à maintenir le flan de tôle 1 de façon à éviter le glissement des tôles métalliques 2 et 3 l'une par rapport à l'autre au moment du soudage des bords 2a et 3a, comme on le verra ultérieurement. On the other hand, the device comprises a clamping bench 20 intended to hold the sheet blank 1 so as to prevent the metal sheets 2 and 3 from sliding relative to one another when the edges 2a are welded, and 3a, as will be seen later.
Ce banc de bridage 20 est constitué par deux barres, respectivement 21 et 22, disposées chacune de part et d'autre du flan de tôle 1 et appliquées sur chaque face externe des tôles métalliques 2 et 3 dudit flan de tôle 1. This clamping bench 20 is constituted by two bars, respectively 21 and 22, each arranged on either side of the sheet blank 1 and applied to each external face of the metal sheets 2 and 3 of said sheet blank 1.
Le procédé selon l'invention consiste tout d'abord à maintenir le flan de tôle 1 par les barres de bridage 21 et 22. The method according to the invention consists first of all in maintaining the sheet blank 1 by the clamping bars 21 and 22.
Ensuite, on applique sur les bords 2a et 3a des faces externes des tôles 2 et 3 les deux molettes 10 et 11 placées en regard l'une de l'autre de telle façon que chaque molette repose par au moins une portion de sa surface de contact sur la face externe de l'une desdites tôles métalliques 2 et 3. Then, the two knobs 10 and 11 placed opposite one another are applied to the edges 2a and 3a of the external faces of the sheets 2 and 3 so that each knurl rests by at least a portion of its surface contact on the external face of one of said metal sheets 2 and 3.
L'effort de serrage appliqué sur les bords 2a et 3a du flan de tôle 1 provoque un écrasement desdits bords au droit de la zone comprise entre les surfaces de contact des molettes 10 et 11. The clamping force applied to the edges 2a and 3a of the sheet metal blank 1 causes said edges to be crushed in line with the zone between the contact surfaces of the knobs 10 and 11.
On alimente électriquement les molettes 10 et
Il par le générateur 16 et le courant électrique empreinte le chemin qui va de la molette supérieure 10 à la molette inférieure 11 en passant par les bords 2a et 3a des tôles métalliques 2 et 3, par l'intermédiaire des particules conductrices contenues dans le polymère constituant la couche 4.The knobs 10 are electrically supplied and
It by the generator 16 and the electric current imprints the path which goes from the upper wheel 10 to the lower wheel 11 passing through the edges 2a and 3a of the metal sheets 2 and 3, via the conductive particles contained in the polymer constituting layer 4.
Le passage du courant provoque un échauffement par effet Joule de la couche de polymère 4 ce qui entraîne une décomposition locale du polymère de ladite couche au droit des molettes 10 et îl et du fait de lteffort de serrage appliqué par les molettes 10 et 11 son éjection vers l'extérieur et le soudage des bords 2a et 3a des tôles métalliques 2 et 3. The current flow causes a heating by Joule effect of the polymer layer 4 which causes a local decomposition of the polymer of said layer in line with the knobs 10 and il and due to the tightening force applied by the knobs 10 and 11 its ejection outwards and the welding of the edges 2a and 3a of the metal sheets 2 and 3.
Les molettes 10 et 11 se déplacent tout au long du pourtour du flan de tôle 1. The wheels 10 and 11 move along the periphery of the sheet blank 1.
Le procédé selon l'invention permet d'obtenir un flan de tôle à structure multicouche dont le pourtour est composé de deux tôles métalliques localement soudées. The method according to the invention makes it possible to obtain a sheet blank with a multilayer structure, the periphery of which is made up of two locally welded metal sheets.
Ainsi, ce pourtour est soudable par n'importe quel procédé. Thus, this periphery is weldable by any process.
Le procédé selon l'invention est basé sur une technologique simple qui peut être facilement mise en oeuvre en aval de la ligne de découpe des flans de tôle. The method according to the invention is based on a simple technology which can be easily implemented downstream of the sheet blank cutting line.
Les flans de tôle ainsi produits peuvent être aisément utilisés dans l'industrie automobile pour la réparation des véhicules accidentés, sans modification des techniques de soudage habituellement employées par ces réparateurs. The sheet blanks thus produced can be easily used in the automotive industry for repairing damaged vehicles, without modifying the welding techniques usually employed by these repairers.
De plus, ltemboutissage de tels flans de tôle à structure multicouche est facilité puisque la liaison soudée sur le pourtour permet d'éviter la formation de plis résultant du glissement relatif des tôles métalliques externes au cours de l'emboutissage. In addition, stamping of such sheet metal blanks with a multilayer structure is facilitated since the welded connection on the periphery makes it possible to avoid the formation of folds resulting from the relative sliding of the external metal sheets during stamping.
Le flan de tôle selon l'invention s'emboutit donc comme un flan de tôle monolithique. The sheet blank according to the invention therefore stamps like a monolithic sheet blank.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9310014A FR2709083B1 (en) | 1993-08-16 | 1993-08-16 | Sheet blank of multilayer structure with improved weldability and stampability and method and device for manufacturing this type of sheet blanks. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9310014A FR2709083B1 (en) | 1993-08-16 | 1993-08-16 | Sheet blank of multilayer structure with improved weldability and stampability and method and device for manufacturing this type of sheet blanks. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2709083A1 true FR2709083A1 (en) | 1995-02-24 |
| FR2709083B1 FR2709083B1 (en) | 1995-11-10 |
Family
ID=9450239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9310014A Expired - Fee Related FR2709083B1 (en) | 1993-08-16 | 1993-08-16 | Sheet blank of multilayer structure with improved weldability and stampability and method and device for manufacturing this type of sheet blanks. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2709083B1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013020636A1 (en) * | 2011-08-06 | 2013-02-14 | Volkswagen Aktiengesellschaft | Joining sheet metal-type components having an intermediate layer made of thermoplastic synthetic material |
| WO2013053744A1 (en) * | 2011-10-10 | 2013-04-18 | Thyssenkrupp Steel Europe Ag | Method and device for producing a composite sheet-metal part with a metal edge region |
| WO2013076117A1 (en) * | 2011-11-23 | 2013-05-30 | Thyssenkrupp Steel Europe Ag | Method for producing a composite sheet metal part having a metallic region, and corresponding molding tool |
| WO2015169588A1 (en) * | 2014-05-09 | 2015-11-12 | Volkswagen Aktiengesellschaft | Method and device for joining a composite sheet metal component to another component |
| EP3034226A1 (en) * | 2014-12-18 | 2016-06-22 | Outokumpu Oyj | Method for manufacturing a sandwich panel |
| US20160279730A1 (en) * | 2015-03-26 | 2016-09-29 | Thyssenkrupp Steel Europe Ag | Method and device for the resistance welding of sandwich sheets |
| CN107249771A (en) * | 2015-02-04 | 2017-10-13 | 蒂森克虏伯钢铁欧洲股份公司 | For the component for manufacturing the method for the component being made up of sandwich material and being made up of sandwich material |
| EP3339017A1 (en) | 2016-12-22 | 2018-06-27 | Outokumpu Oyj | Method for manufacturing a weldable metal-polymer multilayer composite |
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| FR2101910A5 (en) * | 1970-07-29 | 1972-03-31 | Matsushita Electric Industrial Co Ltd | Spot welding - by displacing thermoplastic interlayer by extraneous short circuit between outer metal layers |
| FR2344765A1 (en) * | 1976-03-19 | 1977-10-14 | Clarke Robert | Sealing method for spot welded joints - uses metallic globules mixed with plastic sealing compound and fused by welding arc |
| EP0191300A1 (en) * | 1985-02-13 | 1986-08-20 | Vacuumschmelze GmbH | Resistance-welding process for soldering or welding metastable metals |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013020636A1 (en) * | 2011-08-06 | 2013-02-14 | Volkswagen Aktiengesellschaft | Joining sheet metal-type components having an intermediate layer made of thermoplastic synthetic material |
| JP2014530136A (en) * | 2011-10-10 | 2014-11-17 | ティッセンクルップ スチール ヨーロッパアクチェンゲゼルシャフトＴｈｙｓｓｅｎＫｒｕｐｐ Ｓｔｅｅｌ Ｅｕｒｏｐｅ ＡＧ | Composite sheet metal parts with metal edge regions |
| WO2013053744A1 (en) * | 2011-10-10 | 2013-04-18 | Thyssenkrupp Steel Europe Ag | Method and device for producing a composite sheet-metal part with a metal edge region |
| CN103998175B (en) * | 2011-10-10 | 2017-11-28 | 蒂森克虏伯钢铁欧洲股份公司 | Method and device for producing composite panel parts with metal edge regions |
| CN103998175A (en) * | 2011-10-10 | 2014-08-20 | 蒂森克虏伯钢铁欧洲股份公司 | Method and device for producing a composite sheet-metal part with a metal edge region |
| US20140298875A1 (en) * | 2011-10-10 | 2014-10-09 | Thyssenkrupp Steel Europe Ag | Method and Device for Producing a Composite Sheet-Metal Part with a Metal Edge Region |
| CN104080567A (en) * | 2011-11-23 | 2014-10-01 | 蒂森克虏伯钢铁欧洲股份公司 | Method for producing a composite sheet metal part having a metallic region, and corresponding molding tool |
| US9718265B2 (en) | 2011-11-23 | 2017-08-01 | Thyssenkrupp Steel Europe Ag | Method for producing a composite sheet metal part having a metallic region, and corresponding molding tool |
| WO2013076117A1 (en) * | 2011-11-23 | 2013-05-30 | Thyssenkrupp Steel Europe Ag | Method for producing a composite sheet metal part having a metallic region, and corresponding molding tool |
| WO2015169588A1 (en) * | 2014-05-09 | 2015-11-12 | Volkswagen Aktiengesellschaft | Method and device for joining a composite sheet metal component to another component |
| EP3034226A1 (en) * | 2014-12-18 | 2016-06-22 | Outokumpu Oyj | Method for manufacturing a sandwich panel |
| US10654123B2 (en) | 2014-12-18 | 2020-05-19 | Outokumpu Oyj | Method for manufacturing a sandwich panel |
| CN107249771A (en) * | 2015-02-04 | 2017-10-13 | 蒂森克虏伯钢铁欧洲股份公司 | For the component for manufacturing the method for the component being made up of sandwich material and being made up of sandwich material |
| CN107249771B (en) * | 2015-02-04 | 2019-11-15 | 蒂森克虏伯钢铁欧洲股份公司 | Method for producing a component made of sandwich material and component made of sandwich material |
| US20160279730A1 (en) * | 2015-03-26 | 2016-09-29 | Thyssenkrupp Steel Europe Ag | Method and device for the resistance welding of sandwich sheets |
| US10702943B2 (en) * | 2015-03-26 | 2020-07-07 | Thyssenkrupp Steel Europe Ag | Method and device for the resistance welding of sandwich sheets |
| EP3339017A1 (en) | 2016-12-22 | 2018-06-27 | Outokumpu Oyj | Method for manufacturing a weldable metal-polymer multilayer composite |
| WO2018114606A1 (en) | 2016-12-22 | 2018-06-28 | Outokumpu Oyj | Method for manufacturing a weldable metal-polymer multilayer composite |
| US12115592B2 (en) | 2016-12-22 | 2024-10-15 | Outokumpu Oyj | Method for manufacturing a weldable metal-polymer multilayer composite |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2709083B1 (en) | 1995-11-10 |
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