EP2190685A2 - Door band for automobile, door for automobile and methods for making same - Google Patents

Door band for automobile, door for automobile and methods for making same

Info

Publication number
EP2190685A2
EP2190685A2 EP08832534A EP08832534A EP2190685A2 EP 2190685 A2 EP2190685 A2 EP 2190685A2 EP 08832534 A EP08832534 A EP 08832534A EP 08832534 A EP08832534 A EP 08832534A EP 2190685 A2 EP2190685 A2 EP 2190685A2
Authority
EP
European Patent Office
Prior art keywords
door
zone
box
structural section
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08832534A
Other languages
German (de)
French (fr)
Inventor
Jean-François LEROOY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Original Assignee
Renault SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP2190685A2 publication Critical patent/EP2190685A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors

Definitions

  • the present invention relates to a door strip for a motor vehicle, a motor vehicle door and methods of manufacturing the same.
  • the door 1 comprises a strip 2 which is structurally sized to withstand sudden stresses by the door 1.
  • the strip 2 is made by roller burnishing followed by a laser welding 21.
  • the resistance welding or SR is an electrical resistance welding method. The welding is performed by points between two electrodes, without adding material.
  • On the strip 2 is then fixed, by resistance welding, SR, or riveting 12, a box 3 consisting of a thin sheet of trim, or bodywork.
  • the door most often comprises a rivet 15 which requires a joint drilling of the box 3 and the strip 2. This drilling is currently difficult or requires expensive tooling solutions.
  • the slightest change in shape, including local, impacting the rabbet, requires the modification of the production tools of the box 3 and the strip 2.
  • the strip 2 is in no way independent of the shape of the box 3.
  • the present invention overcomes these disadvantages by proposing a solution separating the structural form, thus allowing to separately optimize the constraints of each category.
  • the subject of the invention is a motor vehicle door strip, characterized in that it comprises a substantially U-shaped section structural section, a box support piece comprising a substantially flat central zone facing the branches of said U, an upper zone and a lower zone, the structural section being fixed by the branches of the U on the central zone of the box support piece, by simultaneous welding SEFG laser welding of the two branches of the U.
  • An advantage of the device according to the invention is that the U-shaped structural section meets the structural constraints, while the box support part meets the shape constraints of the box. This simplifies the solutions of the structural problems, while offering a diversity and a flexibility in the design of the forms.
  • the support piece has in its upper zone, respectively lower, any shape, complementary to the shape of an upper zone, respectively lower, of a door box, and can be directly attached to this box.
  • Another advantage of the device according to the invention is to allow the realization of a strip having a hollow body with two rabbets, said rabbets being curvable.
  • Another advantage of the device according to the invention is to allow easy drilling of the support member for the realization of an opening for the passage of a cataphoresis.
  • Another advantage of the device according to the invention is to provide a simpler manufacturing process, more economical and transferable anywhere in the world.
  • FIG. 1 (already described) illustrates a motor vehicle door, seen in section, according to the prior art
  • Figure 2 illustrates a motor vehicle door, sectional view, according to the invention
  • Figure 3 illustrates a step of the method of manufacturing a door strip according to the invention.
  • a motor vehicle door strip 2 according to the invention comprises a structural section
  • a caisson support member 5 comprising a substantially flat central zone 6 facing the branches of said U, an upper zone 7 and a lower zone 8.
  • the structural section 4 is fixed by the branches of the U on the central zone 6 of the caisson support part 5. This fixing is advantageously carried out by welding by laser solder Electric Weld Wire Gas or SEFG simultaneous of the two branches of the U.
  • SEFG Weld Wire Gas
  • SEFG Welding type Electric Weld Wire Gas or SEFG is an electric arc welding, with electrode wire in solid steel, consumable, under a gaseous protective atmosphere.
  • the central portion 6 of the box support member 5 is substantially planar to correspond to the branches of the U of the structural section 4 which is rectilinear.
  • the upper zone 7, respectively the lower zone 8, may be of any shape, and is advantageously curved to correspond to the shape of the caisson 3 in its upper zone 9, respectively lower 10, at the level of the rabbets.
  • the structural section 4 can thus be made of a material, and have a thickness, determined to withstand the forces that can be experienced by the door strip.
  • the structural section 4 can be made of THLE (steel with very high elastic limit) or aluminum.
  • the structural section 4 is not limited in thickness to 2 mm.
  • the structural section 4 has a simple rectilinear shape. It can be obtained by hot stamping, stamping on a progressive tool. Its particularly simple shape advantageously makes it possible to cut it into an existing preform. This pre existing profile can be purchased by the meter.
  • the support part 5 is the part of the strip 2 which assumes the shape constraints of the strip. Thus, its central portion 6 is substantially planar so as to be welded to the structural section 4.
  • the upper zone 7, respectively the lower zone 8, of the support part 5, are shaped, as transition elements, in order to adapt to the shape of an upper zone 9, respectively lower 10, of a door box 3.
  • the box can be directly assembled on the support part 5, to achieve an upper rabbet, respectively lower, directly adaptable, for example, to the curve of the window.
  • the support part 5 not having to withstand very high structural stresses may have a reduced thickness.
  • its material may be steel sheet or aluminum.
  • the support piece 5 is made of steel or aluminum, to be welded by laser brazing, optionally, on a structural section 4 steel, or aluminum.
  • the casing 3 made of aluminum or, more often, steel, can be welded to a support piece 5 of similar material.
  • a box 3 may be riveted to a support part 5 of different material.
  • the support part 5, of reduced thickness and made of a material of average mechanical characteristics, can advantageously be achieved by stamping on a progressive tool.
  • This embodiment is economically advantageous.
  • the support part 5 can be pierced with an opening 13 between the two branches of the U. This allows easy passage of cataphoresis.
  • the support part 5 is easy to drill.
  • the structural section 4 by its U-shape does not have to be drilled for this implementation.
  • the invention also relates to a door 1 of a motor vehicle comprising a door strip 2 according to any one of the preceding embodiments and a thin sheet door box 3 comprising an upper zone 9 and a lower zone 10, assembled by welding SR or riveting their upper zones 7, 9, and respective lower 8, 10, respectively.
  • the manufacture of a motor vehicle door strip 2 comprises the following steps. Fabrication, by stamping or cutting, of a substantially U-shaped structural section 4. Fabrication, by stamping on a progressive tool, of a support part 5 of box, comprising a substantially flat central zone 6, an upper zone 7 and a lower zone 8, shaped in its upper zone, respectively lower, in any form, complementary to the shape of an upper zone 9, respectively lower 10, d a door box 3. SEFG synchronized double laser soldering welding, of the two branches of the U of the structural section 4, on the central zone 6 of the support part 5 of the box.
  • FIG. 3 illustrates the welding step.
  • the support part 5 is integral, possibly pierced with an opening 13. It is placed on a lower support 18.
  • the structural section 4 is placed against the support part 5 in the end position.
  • This assembly is held by a support exerted by means of an upper support 17.
  • Two synchronized lasers 19, on either side of the profile 4, animated by a linear movement relative to said assembly each then realize one of the welds 11 between the structural section 4 and the support part 5.
  • This welding assembly is advantageously carried out offline.
  • the manufacture of a door 1 of a motor vehicle according to the invention comprises the following steps. Manufacture of a door strip 2 by the above method. Manufacturing a thin sheet door box 3 comprising an upper zone 9 and a lower zone 10, by any method known to those skilled in the art. Assembling said door strip 2 and said door box 3 by SR welding or riveting, their respective upper zones 7, 9 and 8, 10 respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Laser Beam Processing (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention relates to a band (2) for the door of an automobile, that comprises a structural profile (4) having a substantially U-shaped cross section, a box-bearing part (5) having a substantially planar area (6) opposite the branches of said U, an upper area (7) and a lower area (8), the structural profile (4) being attached by the branches of the U to the central area (6) of the box-bearing part (5).

Description

Bandeau de porte pour véhicule automobile, porte de véhicule automobile et procédés de fabrication de ceux-ciDoor strip for a motor vehicle, door of a motor vehicle and methods of manufacturing the same
La présente invention concerne un bandeau de porte pour véhicule automobile, une porte de véhicule automobile et des procédés de fabrication de ceux-ci.The present invention relates to a door strip for a motor vehicle, a motor vehicle door and methods of manufacturing the same.
Dans le domaine de la fabrication des bandeaux de porte et des portes de véhicule automobile il est connu de fabriquer des bandeaux de portes et des portes selon la figure 1. La porte 1 comprend un bandeau 2 qui est structurellement dimensionné pour résister aux efforts subits par la porte 1. Le bandeau 2 est réalisé par galetage suivi d'une soudure laser 21. Le soudage par résistance ou SR, est un procédé de soudure par résistance électrique. La soudure est réalisée par points entre deux électrodes, sans apport de matière. Sur le bandeau 2 est ensuite fixé, par soudage par résistance, SR, ou rivetage 12, un caisson 3 constitué d'une tôle mince d'habillage, ou carrosserie.In the field of the manufacture of door panels and motor vehicle doors it is known to manufacture door strips and doors according to Figure 1. The door 1 comprises a strip 2 which is structurally sized to withstand sudden stresses by the door 1. The strip 2 is made by roller burnishing followed by a laser welding 21. The resistance welding or SR, is an electrical resistance welding method. The welding is performed by points between two electrodes, without adding material. On the strip 2 is then fixed, by resistance welding, SR, or riveting 12, a box 3 consisting of a thin sheet of trim, or bodywork.
Ce mode de réalisation comporte plusieurs inconvénients. La présence d'une seule feuillure, au niveau de la partie supérieure 7, nécessite l'ajout d'une seconde feuillure en partie inférieure 8. Cette pièce rapportée par une fixation 14 s'avère défavorable vis-à-vis du test de tenue en endurance au claquement de porte. La technique de galetage utilisée pour réaliser le bandeau 2 ne permet pas de créer un corps creux avec deux feuillures simple épaisseur.This embodiment has several disadvantages. The presence of a single rebate, at the top 7, requires the addition of a second rabbet at the bottom portion 8. This insert by a fastener 14 is unfavorable vis-à-vis the test of holding in endurance at the door slam. The burnishing technique used to make the strip 2 does not create a hollow body with two rebates single thickness.
La feuillure du bandeau 2 en partie supérieure 7, du fait de sa réalisation par galetage, est rectiligne, tandis que la feuillure de lécheur en partie supérieure 9 du caisson 3 est généralement galbée pour suivre la courbure de la vitre. Ceci complique la conception de la forme du caisson 3.The rabbet of the strip 2 in the upper part 7, because of its production by rolling, is rectilinear, while the groove of the liner in the upper part 9 of the box 3 is generally curved to follow the curvature of the window. This complicates the design of the shape of the box 3.
De plus il n'est pas possible de souder directement la feuillure rectiligne du bandeau 2 en partie supérieure 7 sur la feuillure galbée de lécheur en partie supérieure 9 du caisson 3. La soudure est alors réalisée en dessous de la feuillure de lécheur. Ceci entraîne un manque de raideur de la feuillure de lécheur en partie supérieure 9 du caisson 3, nécessite une conformation particulière du caisson 3 pour adapter la forme entre une partie rectiligne ou s'effectue la soudure, et la partie galbée de la feuillure de lécheur, et la réalisation le cas échéant d'un épaulement 20.In addition it is not possible to directly weld the rectilinear rabbet of the strip 2 in the upper part 7 on the curved rebate liner in the upper part 9 of the box 3. The weld is then performed below the rabbet rabbet. This results in a lack of stiffness of the rebate rabbet in the upper part 9 of the casing 3, requires a particular conformation of the casing 3 to adapt the shape between a rectilinear part where the welding takes place, and the curved part of the rabbet rabbet , and the realization, if necessary, of a shoulder 20.
La faisabilité des soudures 12 entraîne des contraintes d'épaisseurs relatives entre le caisson 3 qui présente une tôle mince d'épaisseur 0,65 mm et le bandeau 2 qui ne peut, de ce fait, présenter une épaisseur supérieure à 2 mm. Ceci est préjudiciable à la fonction structurelle du bandeau 2 et nécessite d'autres réalisations de renfort telles que par exemple des nervures 16.The feasibility of the welds 12 causes relative thickness constraints between the box 3 which has a thin sheet 0.65 mm thick and the strip 2 which can not, therefore, have a thickness greater than 2 mm. This is detrimental to the structural function of the strip 2 and requires other embodiments of reinforcement such as for example ribs 16.
La porte comporte le plus souvent un rivetage 15 qui nécessite un perçage conjoint du caisson 3 et du bandeau 2. Ce perçage est actuellement difficile ou nécessite des solutions d'outillages coûteuses.The door most often comprises a rivet 15 which requires a joint drilling of the box 3 and the strip 2. This drilling is currently difficult or requires expensive tooling solutions.
La moindre modification de forme, y compris locale, impactant la feuillure, nécessite la modification des outillages de réalisation du caisson 3 et du bandeau 2. Le bandeau 2 n'est d'aucune manière indépendant de la forme du caisson 3.The slightest change in shape, including local, impacting the rabbet, requires the modification of the production tools of the box 3 and the strip 2. The strip 2 is in no way independent of the shape of the box 3.
En fonction des exigences réglementaires pouvant varier selon les pays, il est avantageux de pouvoir faire varier la résistance du bandeau 2 sans modification de la forme du caisson 3. Ceci s'avère difficile dans ce mode de réalisation .Depending on the regulatory requirements may vary from country to country, it is advantageous to vary the strength of the strip 2 without changing the shape of the box 3. This is difficult in this embodiment.
Ces différentes dépendances entre les contraintes de tenue structurelle et les contraintes de forme externe, conduisent à des composants spécifiques, non standard de fait et entraînent de nombreux outillages spécifiques et par conséquent des coûts élevés.These different dependencies between structural withstand constraints and external shape constraints, lead to specific components, non-standard de facto and lead to many specific tools and therefore high costs.
La présente invention remédie à ces différents inconvénients en proposant une solution séparant le structurel de la forme, permettant ainsi d'optimiser séparément les contraintes de chaque catégorie.The present invention overcomes these disadvantages by proposing a solution separating the structural form, thus allowing to separately optimize the constraints of each category.
L'invention a pour objet un bandeau de porte de véhicule automobile, caractérisé en ce qu'il comprend un profilé structurel de section sensiblement en forme de U, une pièce support de caisson comprenant une zone centrale sensiblement plane en regard des branches dudit U, une zone supérieure et une zone inférieure, le profilé structurel étant fixé par les branches du U sur la zone centrale de la pièce support de caisson, par soudage par brasure laser SEFG simultané des deux branches du U.The subject of the invention is a motor vehicle door strip, characterized in that it comprises a substantially U-shaped section structural section, a box support piece comprising a substantially flat central zone facing the branches of said U, an upper zone and a lower zone, the structural section being fixed by the branches of the U on the central zone of the box support piece, by simultaneous welding SEFG laser welding of the two branches of the U.
Un avantage du dispositif selon l'invention est que le profilé structurel en forme de U répond aux contraintes structurelles, tandis que la pièce support de caisson répond aux contraintes de forme du caisson. Ceci permet de simplifier les solutions des problèmes structurels, tout en offrant une diversité et une flexibilité dans la conception des formes.An advantage of the device according to the invention is that the U-shaped structural section meets the structural constraints, while the box support part meets the shape constraints of the box. This simplifies the solutions of the structural problems, while offering a diversity and a flexibility in the design of the forms.
Un autre avantage du dispositif selon l'invention est que la pièce support présente dans sa zone supérieure, respectivement inférieure, une forme quelconque, complémentaire de la forme d'une zone supérieure, respectivement inférieure, d'un caisson de porte, et peut être directement fixée sur ce caisson.Another advantage of the device according to the invention is that the support piece has in its upper zone, respectively lower, any shape, complementary to the shape of an upper zone, respectively lower, of a door box, and can be directly attached to this box.
Un autre avantage du dispositif selon l'invention est de permettre la réalisation d'un bandeau présentant un corps creux avec deux feuillures, lesdites feuillures pouvant être galbées .Another advantage of the device according to the invention is to allow the realization of a strip having a hollow body with two rabbets, said rabbets being curvable.
Un autre avantage du dispositif selon l'invention est de permettre un perçage aisé de la pièce support pour la réalisation d'une ouverture permettant le passage d'une cataphorèse.Another advantage of the device according to the invention is to allow easy drilling of the support member for the realization of an opening for the passage of a cataphoresis.
Un autre avantage du dispositif selon l'invention est de proposer un procédé de fabrication plus simple, plus économique et transférable partout dans le monde.Another advantage of the device according to the invention is to provide a simpler manufacturing process, more economical and transferable anywhere in the world.
D'autres caractéristiques, détails et avantages de l'invention ressortiront plus clairement de la description détaillée donnée ci-après à titre indicatif en relation avec des dessins sur lesquels : la figure 1 (déjà décrite) illustre une porte de véhicule automobile, vue en coupe, selon l'art antérieur, - la figure 2 illustre une porte de véhicule automobile, vue en coupe, selon l'invention, la figure 3 illustre une étape du procédé de fabrication d'un bandeau de porte selon l'invention.Other characteristics, details and advantages of the invention will emerge more clearly from the detailed description given below as an indication in relation to drawings in which: FIG. 1 (already described) illustrates a motor vehicle door, seen in section, according to the prior art, - Figure 2 illustrates a motor vehicle door, sectional view, according to the invention, Figure 3 illustrates a step of the method of manufacturing a door strip according to the invention.
Selon la figure 2, un bandeau 2 de porte de véhicule automobile selon l'invention, comprend un profilé structurelAccording to FIG. 2, a motor vehicle door strip 2 according to the invention comprises a structural section
4 de section sensiblement en forme de U, une pièce support 5 de caisson comprenant une zone centrale 6 sensiblement plane en regard des branches dudit U, une zone supérieure 7 et une zone inférieure 8. Le profilé structurel 4 est fixé par les branches du U sur la zone centrale 6 de la pièce support 5 de caisson . Cette fixation s'effectue avantageusement, par soudage par brasure laser Soudure Electrique Fil Gaz ou SEFG simultané des deux branches du U. Ainsi le bandeau 2 est séparé en un profilé structurel 4 qui répond aux contraintes structurelles et en une pièce 5 support de caisson qui répond aux contraintes de forme.4 of substantially U-shaped section, a caisson support member 5 comprising a substantially flat central zone 6 facing the branches of said U, an upper zone 7 and a lower zone 8. The structural section 4 is fixed by the branches of the U on the central zone 6 of the caisson support part 5. This fixing is advantageously carried out by welding by laser solder Electric Weld Wire Gas or SEFG simultaneous of the two branches of the U. Thus the strip 2 is separated into a structural section 4 which meets the structural constraints and a box support part which meets the constraints of form.
Le soudage de type Soudure Electrique Fil Gaz ou SEFG est un soudage électrique à l'arc, avec fil électrode en acier massif, consommable, sous une atmosphère gazeuse de protection.Welding type Electric Weld Wire Gas or SEFG is an electric arc welding, with electrode wire in solid steel, consumable, under a gaseous protective atmosphere.
La partie centrale 6 de la pièce 5 support de caisson est sensiblement plane pour correspondre aux branches du U du profilé structurel 4 qui est rectiligne. La zone supérieure 7, respectivement la zone inférieure 8, peut être de forme quelconque, et est avantageusement galbée pour correspondre à la forme du caisson 3 dans sa zone supérieure 9, respectivement inférieure 10, aux niveaux des feuillures.The central portion 6 of the box support member 5 is substantially planar to correspond to the branches of the U of the structural section 4 which is rectilinear. The upper zone 7, respectively the lower zone 8, may be of any shape, and is advantageously curved to correspond to the shape of the caisson 3 in its upper zone 9, respectively lower 10, at the level of the rabbets.
Le soudage SEFG ne présente pas les contraintes liées aux épaisseurs relatives des matériaux soudés. Le profilé structurel 4 peut ainsi être constitué d'un matériau, et présenter une épaisseur, déterminées afin de supporter les efforts pouvant être subis par le bandeau de porte.SEFG welding does not have the constraints related to the relative thicknesses of the welded materials. The structural section 4 can thus be made of a material, and have a thickness, determined to withstand the forces that can be experienced by the door strip.
En fonction des contraintes mécaniques à supporter, et des contraintes de soudage en fonction du matériau de la pièce support de caisson 5, le profilé structurel 4 peut être réalisé en THLE (acier à Très Haute Limite Elastique) ou en aluminium.Depending on the mechanical stresses to be withstood, and welding stresses depending on the material of the box support part 5, the structural section 4 can be made of THLE (steel with very high elastic limit) or aluminum.
Avantageusement, relativement à l'art antérieur, pour une même épaisseur de caisson de 0,65 mm, le profilé structurel 4 n'est pas limité en épaisseur à 2mmm.Advantageously, relative to the prior art, for the same box thickness of 0.65 mm, the structural section 4 is not limited in thickness to 2 mm.
Le profilé structurel 4 présente une forme rectiligne simple. Il peut être obtenu par emboutissage à chaud, emboutissage sur outil progressif. Sa forme particulièrement simple permet avantageusement de le découper dans un profilé pré existant. Ce profilé pré existant peut être acheté au mètre .The structural section 4 has a simple rectilinear shape. It can be obtained by hot stamping, stamping on a progressive tool. Its particularly simple shape advantageously makes it possible to cut it into an existing preform. This pre existing profile can be purchased by the meter.
La pièce support 5 est la partie du bandeau 2 qui assume les contraintes de forme du bandeau. Ainsi sa partie centrale 6 est sensiblement plane afin de pouvoir être soudée avec le profilé structurel 4. La zone supérieure 7, respectivement la zone inférieure 8, de la pièce support 5, sont conformées, comme des éléments de transition, afin de s'adapter à la forme d'une zone supérieure 9, respectivement inférieure 10, d'un caisson 3 de porte. Ainsi le caisson peut directement être assemblé sur la pièce support 5, afin de réaliser une feuillure supérieure, respectivement inférieure, directement adaptables, par exemple, au galbe de la vitre.The support part 5 is the part of the strip 2 which assumes the shape constraints of the strip. Thus, its central portion 6 is substantially planar so as to be welded to the structural section 4. The upper zone 7, respectively the lower zone 8, of the support part 5, are shaped, as transition elements, in order to adapt to the shape of an upper zone 9, respectively lower 10, of a door box 3. Thus the box can be directly assembled on the support part 5, to achieve an upper rabbet, respectively lower, directly adaptable, for example, to the curve of the window.
La pièce support 5 n'ayant pas à supporter des contraintes structurelles très élevée peut présenter une épaisseur réduite. Compte tenu de ces contraintes structurelles et des contraintes de soudage avec le profilé structurel 4 d'une part et avec le caisson 3, sa matière peut être de la tôle d'acier ou d'aluminium.The support part 5 not having to withstand very high structural stresses may have a reduced thickness. Given these structural constraints and welding constraints with the structural section 4 on the one hand and with the box 3, its material may be steel sheet or aluminum.
Avantageusement la pièce support 5 est en acier ou en aluminium, pour pouvoir être soudée par brasure laser, au choix, sur un profilé structurel 4 en acier, ou en aluminium.Advantageously, the support piece 5 is made of steel or aluminum, to be welded by laser brazing, optionally, on a structural section 4 steel, or aluminum.
Le caisson 3, en aluminium ou plus souvent en acier, peut être soudé SR sur une pièce support 5 de matériau similaire.The casing 3, made of aluminum or, more often, steel, can be welded to a support piece 5 of similar material.
Alternativement, un caisson 3, peut être riveté sur une pièce support 5 de matériau différent. La pièce support 5, d'épaisseur réduite et réalisée dans un matériau de caractéristiques mécaniques moyennes, peut avantageusement être réalisée par emboutissage sur outil progressif. Ce mode de réalisation est économiquement avantageux . Selon un mode de réalisation avantageux la pièce support 5 peut être percée d'une ouverture 13 entre les deux branches du U. Ceci permet un passage aisé de la cataphorèse. La pièce support 5 est facile à percer. Le profilé structurel 4 de par sa forme en U n'a pas à être percé pour cette mise en place. L'invention concerne encore une porte 1 de véhicule automobile comprenant un bandeau 2 de porte selon l'un quelconque des modes de réalisation précédents et un caisson 3 de porte de tôle fine comprenant une zone supérieure 9 et une zone inférieure 10, assemblés par soudage SR ou rivetage de leurs zones supérieures 7, 9, et respectivement inférieures 8, 10, respectives.Alternatively, a box 3 may be riveted to a support part 5 of different material. The support part 5, of reduced thickness and made of a material of average mechanical characteristics, can advantageously be achieved by stamping on a progressive tool. This embodiment is economically advantageous. According to an advantageous embodiment the support part 5 can be pierced with an opening 13 between the two branches of the U. This allows easy passage of cataphoresis. The support part 5 is easy to drill. The structural section 4 by its U-shape does not have to be drilled for this implementation. The invention also relates to a door 1 of a motor vehicle comprising a door strip 2 according to any one of the preceding embodiments and a thin sheet door box 3 comprising an upper zone 9 and a lower zone 10, assembled by welding SR or riveting their upper zones 7, 9, and respective lower 8, 10, respectively.
La fabrication d'un bandeau 2 de porte de véhicule automobile selon l'invention comprend les étapes suivantes. Fabrication, par emboutissage ou découpage, d'un profilé structurel 4 sensiblement en forme de U. Fabrication, par emboutissage sur outil progressif, d'une pièce support 5 de caisson, comprenant une zone centrale 6 sensiblement plane, une zone supérieure 7 et une zone inférieure 8, conformée dans sa zone supérieure, respectivement inférieure, selon une forme quelconque, complémentaire de la forme d'une zone supérieure 9, respectivement inférieure 10, d'un caisson 3 de porte. Soudage par double brasure laser SEFG synchronisée, des deux branches du U du profilé structurel 4, sur la zone centrale 6 de la pièce support 5 de caisson.The manufacture of a motor vehicle door strip 2 according to the invention comprises the following steps. Fabrication, by stamping or cutting, of a substantially U-shaped structural section 4. Fabrication, by stamping on a progressive tool, of a support part 5 of box, comprising a substantially flat central zone 6, an upper zone 7 and a lower zone 8, shaped in its upper zone, respectively lower, in any form, complementary to the shape of an upper zone 9, respectively lower 10, d a door box 3. SEFG synchronized double laser soldering welding, of the two branches of the U of the structural section 4, on the central zone 6 of the support part 5 of the box.
La figure 3 illustre l'étape de soudage. La pièce support 5 est monobloc, le cas échéant percée d'une ouverture 13. Elle est placée sur un support inférieur 18. Le profilé structurel 4 est mis en place contre la pièce support 5 en position finale. Cet assemblage est maintenu par un appui exercé au moyen d'un support supérieur 17. Deux lasers 19 synchronisés, de part et d'autre du profilé 4, animés d'un mouvement linéaire relativement audit assemblage réalisent alors chacun une des soudures 11 entre le profilé structurel 4 et la pièce support 5. Cet assemblage par soudage est avantageusement réalisé hors ligne. La fabrication d'une porte 1 de véhicule automobile selon l'invention comprend les étapes suivantes. Fabrication d'un bandeau 2 de porte par le procédé précédent. Fabrication d'un caisson 3 de porte en tôle fine comprenant une zone supérieure 9 et une zone inférieure 10, par toute méthode connue de l'homme du métier. Assemblage dudit bandeau 2 de porte et dudit caisson 3 de porte, par soudage SR ou rivetage, de leurs zones supérieures 7, 9, et respectivement inférieures 8, 10, respectives. Figure 3 illustrates the welding step. The support part 5 is integral, possibly pierced with an opening 13. It is placed on a lower support 18. The structural section 4 is placed against the support part 5 in the end position. This assembly is held by a support exerted by means of an upper support 17. Two synchronized lasers 19, on either side of the profile 4, animated by a linear movement relative to said assembly each then realize one of the welds 11 between the structural section 4 and the support part 5. This welding assembly is advantageously carried out offline. The manufacture of a door 1 of a motor vehicle according to the invention comprises the following steps. Manufacture of a door strip 2 by the above method. Manufacturing a thin sheet door box 3 comprising an upper zone 9 and a lower zone 10, by any method known to those skilled in the art. Assembling said door strip 2 and said door box 3 by SR welding or riveting, their respective upper zones 7, 9 and 8, 10 respectively.

Claims

REVENDICATIONS
1. Bandeau (2) de porte de véhicule automobile, caractérisé en ce qu'il comprend un profilé structurel (4) de section sensiblement en forme de U, une pièce support (5) de caisson comprenant une zone centrale (6) sensiblement plane en regard des branches dudit U, une zone supérieure (7) et une zone inférieure (8), le profilé structurel (4) étant fixé par les branches du U sur la zone centrale (6) de la pièce support (5) de caisson.1. Headband (2) of a motor vehicle door, characterized in that it comprises a structural section (4) of substantially U-shaped section, a support piece (5) of box comprising a central zone (6) substantially planar facing the branches of said U, an upper zone (7) and a lower zone (8), the structural section (4) being fixed by the branches of the U to the central zone (6) of the support part (5) of the caisson .
2. Bandeau de porte selon la revendication 1, où le profilé structurel (4) est fixé sur la pièce support (5) de caisson par soudage par brasure laser SEFG simultané des deux branches du U.2. Doorband according to claim 1, wherein the structural section (4) is fixed on the support piece (5) box by simultaneous welding SEFG laser welding of the two branches of the U.
3. Bandeau de porte selon la revendication 1 ou 2, où le profilé structurel (4) est constitué d'un matériau et présente une épaisseur, aptes à supporter les efforts pouvant être subis par le bandeau de porte.3. Door strip according to claim 1 or 2, wherein the structural section (4) consists of a material and has a thickness, able to withstand the forces that can be experienced by the door strip.
4. Bandeau de porte selon l'une quelconque des revendications 1 à 3, où le profilé structurel (4) est réalisé en THLE ou en aluminium.4. Door panel according to any one of claims 1 to 3, wherein the structural section (4) is made of THLE or aluminum.
5. Bandeau de porte selon l'une quelconque des revendications précédentes, où le profilé structurel (4) est obtenu par emboutissage à chaud, emboutissage sur outil progressif ou découpé dans un profilé pré existant.5. Door strip according to any one of the preceding claims, wherein the structural section (4) is obtained by hot stamping, drawing on a progressive tool or cut into a pre existing profile.
6. Bandeau de porte selon l'une quelconque des revendications précédentes, où la pièce support (5) présente dans sa zone supérieure (7), respectivement inférieure, une forme quelconque, complémentaire de la forme d'une zone supérieure (9), respectivement inférieure (10), d'un caisson (3) de porte .6. Door panel according to any one of the preceding claims, wherein the support part (5) has in its upper zone (7), respectively lower, any shape complementary to the shape of an upper zone (9), respectively lower (10), a housing (3) door.
7. Bandeau de porte selon l'une quelconque des revendications précédentes, où la pièce support (5) est réalisée en tôle d'acier ou d'aluminium. 7. Door panel according to any one of the preceding claims, wherein the support part (5) is made of sheet steel or aluminum.
8. Bandeau de porte selon l'une quelconque des revendications précédentes, où la pièce support (5) est percée d'une ouverture (13) entre les deux branches du U.8. Door panel according to any one of the preceding claims, wherein the support part (5) is pierced with an opening (13) between the two branches of the U.
9. Porte (1) de véhicule automobile comprenant un bandeau (2) de porte selon l'une quelconque des revendications précédentes et un caisson (3) de porte de tôle fine comprenant une zone supérieure (9) et une zone inférieure (10), assemblés par soudage SR ou rivetage de leurs zones supérieures (7, 9), et respectivement inférieures (8, 10), respectives .9. Door (1) for a motor vehicle comprising a headband (2) door according to any one of the preceding claims and a box (3) of thin sheet door comprising an upper zone (9) and a lower zone (10). , assembled by SR welding or riveting their upper zones (7, 9), and respective lower (8, 10), respectively.
10. Procédé de fabrication d'un bandeau (2) de porte de véhicule automobile comprenant les étapes suivantes : fabrication, par emboutissage ou découpage, d'un profilé structurel (4) sensiblement en forme de U, dimensionné en fonction des efforts subits par le bandeau (3) de porte, - fabrication, par emboutissage sur outil progressif, d'une pièce support (5) de caisson, comprenant une zone centrale (6) sensiblement plane, une zone supérieure (7) et une zone inférieure (8), conformée dans sa zone supérieure, respectivement inférieure, selon une forme quelconque, complémentaire de la forme d'une zone supérieure (9), respectivement inférieure (10), d'un caisson (3) de porte,10. A method of manufacturing a strip (2) motor vehicle door comprising the steps of: manufacturing, by stamping or cutting, a substantially U-shaped structural section (4), dimensioned according to the forces experienced by the door strip (3), - manufacture, by progressive-tool stamping, of a support piece (5) of a box comprising a substantially flat central zone (6), an upper zone (7) and a lower zone (8). ), shaped in its upper zone, respectively lower, in any form, complementary to the shape of an upper zone (9), respectively lower (10), of a box (3) door,
- soudage par double brasure laser SEFG synchronisée, des deux branches du U du profilé structurel (4), sur la zone centrale (6) de la pièce support (5) de caisson. - Welding by double SEFG laser brazing synchronized, the two branches of the U of the structural section (4) on the central zone (6) of the support piece (5) caisson.
EP08832534A 2007-09-17 2008-08-20 Door band for automobile, door for automobile and methods for making same Withdrawn EP2190685A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0757635A FR2921017B1 (en) 2007-09-17 2007-09-17 DOOR BAND FOR MOTOR VEHICLE, DOOR OF MOTOR VEHICLE AND METHODS OF MANUFACTURING THE SAME
PCT/FR2008/051511 WO2009037411A2 (en) 2007-09-17 2008-08-20 Door band for automobile, door for automobile and methods for making same

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EP2190685A2 true EP2190685A2 (en) 2010-06-02

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EP08832534A Withdrawn EP2190685A2 (en) 2007-09-17 2008-08-20 Door band for automobile, door for automobile and methods for making same

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WO (1) WO2009037411A2 (en)

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Publication number Priority date Publication date Assignee Title
FR2956170B1 (en) * 2010-02-11 2012-02-24 Peugeot Citroen Automobiles Sa ASSEMBLY COMPRISING TWO PARTS WELDED TO EACH OTHER AND DOOR OF A MOTOR VEHICLE COMPRISING SUCH AN ASSEMBLY
FR2962670B1 (en) * 2010-07-15 2012-07-13 Renault Sa INDUCTIVE UNILATERAL BRAZING ASSEMBLY OF A FINE SHEET AND A HOLLOW PROFILE, AND THE CORRESPONDING PROCESS.

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DE4240824A1 (en) * 1992-12-04 1994-01-13 Daimler Benz Ag Weld joint between components made respectively of steel and aluminium sheet - with the edge of the steel component provided with an aluminium layer
DE4240822C1 (en) * 1992-12-04 1994-04-28 Daimler Benz Ag Welded connection between a sheet steel component and an aluminum sheet component and cover part
DE19538595A1 (en) * 1995-10-17 1997-04-24 Thyssen Industrie Motor vehicle door or flap
JPH11254968A (en) * 1998-03-13 1999-09-21 Isuzu Motors Ltd Vehicle door reinforcing structure
DE10037303A1 (en) * 2000-07-28 2002-02-21 Thyssenkrupp Technologies Ag Method of manufacturing a door of a motor vehicle and frameless door manufactured by this method
ITTO20010377A1 (en) * 2001-04-18 2002-10-18 U T S S P A PROCEDURE FOR THE ASSEMBLY OF A BODY PART OF A VEHICLE SUCH AS A DOOR, A DOOR OR A BONNET.
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Also Published As

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WO2009037411A3 (en) 2009-05-07
FR2921017B1 (en) 2009-10-30
WO2009037411A2 (en) 2009-03-26
FR2921017A1 (en) 2009-03-20

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