EP0711614B1 - Procédé d'assemblage de deux flanes de tÔle métallique - Google Patents
Procédé d'assemblage de deux flanes de tÔle métallique Download PDFInfo
- Publication number
- EP0711614B1 EP0711614B1 EP95401925A EP95401925A EP0711614B1 EP 0711614 B1 EP0711614 B1 EP 0711614B1 EP 95401925 A EP95401925 A EP 95401925A EP 95401925 A EP95401925 A EP 95401925A EP 0711614 B1 EP0711614 B1 EP 0711614B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- metal
- blanks
- coating
- punch
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
- B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
Definitions
- the present invention relates to a method of assembling two sheet metal blanks, at least one of which is coated on at least one of its faces with a metallic coating.
- point clinched The mechanical strength of such an assembly point, called point clinched, is sometimes considered too weak, especially in pure traction.
- the resistance mechanical in pure tension of a clinched point is of the order of 80 to 140 DaN depending on the technology and tools used, and the mechanical strength of a point clinch in tension-shear is of the order of 150 to 280 DaN, always depending on the technology and the tools used.
- the main drawback of this assembly technique is its corrosion resistance.
- the technique consists, using a punch and of a matrix, to make two stampings so as to form, in each sheets from one side, a cavity and on the other side a projection, the projection of the first sheet being inserted into the cavity of the second sheet, said cavity of the second sheet having, near its bottom, a widening while the projection of the first sheet has a flare housed in said enlargement.
- corrosion agents such as that for example simply humidity, or water, which will stagnate and promote corrosion of the sheets at the assembly point.
- Another solution for joining two sheet metal blanks is to use the resistance welding technique.
- Such a welded point has very good mechanical strength, greater than 300 DaN in pure tension and in shear tension.
- the spot resistance welding technique requires that the sheet blanks to be assembled are overlapped over at least 20 mm. This is what is known in the automotive field as the fallen edge, and it turns out that a fallen edge of 20 mm is penalizing in the automobile.
- the spot resistance welding technique is a technique that requires a large amount of energy, electrical intensity necessary for welding being of the order of 10 kA, or even more, which generates a significant cost.
- the coating pollutes the welding electrodes, thus reducing their duration of life.
- the present invention relates to a method of assembling two sheet metal blanks whose mechanical strength of the assembly points is greater than that of the so-called clinched points, and which does not have the disadvantages associated with the resistance welding spot technique.
- the present invention relates to a process for assembling two sheet metal blanks, at least one of which is coated on at least one of its faces with a metallic coating, in which we superimpose the two sheet blanks and we realize at least one point of assembly by cold creep of the type in which one practices simultaneously in the two sheet metal blanks using a punch and a matrix a cavity, for example circular, said cavities being thus housed one inside the other and having an enlargement in the vicinity of the bottom, characterized in that the two sheet blanks are superimposed so that the coated side of the coated sheet blank is in contact with one side of the other sheet blank, and in that we pass between the punch and the die a electric current for soldering said assembly point.
- the subject of the invention is a method of assembling two blanks metallic 1, 2, at least one of which is coated on at least one of its faces a metallic coating.
- the two sheet blanks 1 and 2 are each coated on one of their faces of a metal coating layer, respectively 4 and 5.
- one or both sheet metal blanks 1, 2 can be coated on both sides with a layer of metallic coating.
- the first step in the assembly process is to overlap the two sheet blanks 1, 2.
- the second step of the assembly process according to the invention consists in making at least one cold-flow assembly point of the type in which we practice simultaneously in the two sheet blanks using with a punch and a die a cavity, for example circular, rectangular or other, said cavities being thus housed one inside the other and having an enlargement in the vicinity of the bottom, passing between the punch and the matrix an electric current of soldering of said point assembly when said punch is at the end of the stroke.
- the two sheet blanks 1 and 2 are placed in a device for producing an assembly point by cold creep, i.e. between a matrix 6 and a blank holding device 7 - punch 8.
- the assembly point training device must have a punch and a matrix both conductors of electricity, the punch being electrically isolated from the punch holder (not shown) and the matrix holder matrix (not shown), a current generator electrical (not shown) and a system of electrical contactors level of the punch and of the die (not shown).
- the goal is that by Joule effect due to the passage of current between punch 8 and die 6, so at the interface between the two sheets, we create a brazing point 12 of the two sheet blanks 1 and 2, the layer of metallic coating 3, 4 or 5 serving as brazing, as has been shown in figure 4.
- the intensity of the brazing current must be such that it allows to obtain in the assembly point at the interface between the two sheet blanks 1 and 2, by Joule effect, a temperature between the melting temperature of the metal coating 3, 4, 5 minus 20% and the melting temperature of said coating.
- the intensity of the current of soldering is such that it allows to obtain in the assembly point to the interface between the two sheet blanks 1 and 2, by Joule effect, a temperature between the melting temperature of the metal coating 3, 4, 5 minus 20% and the melting temperature of said coating. minus 10%.
- the method according to the invention as described above is particularly effective for the assembly of two blanks of steel sheet at least one of which is coated on at least one of its faces with a coating based on one or more elements among zinc, aluminum, nickel and their alloys, and when the two sheet blanks are coated on at least one of their faces with an identical metallic coating.
- a first sample was made by making a point assembly according to the prior art, said clinch point and a second sample was produced by performing an assembly point according to the invention passing between the punch and the die when the punch is finished an electric current of 1 kA for 1 second.
- the two points assembly were carried out with punches and dies of form identical and effort exerted between the punch and the die also identical.
- point shear tensile strength assembly of the prior art is equal to 170 DaN, it is equal at 265 DaN for the assembly point according to the invention, i.e. a gain of more 50%.
- the advantage of assembly method according to the invention is that it reduces the edge dropped to a value of 12 to 15 mm compared to the 20 mm needed to make a welded stitch.
- the required electrical intensity is at least ten times less which has a significant economic advantage.
- the method of assembling two sheet blanks according to the invention finds particular application in the field of household appliances and the automobile.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Secondary Cells (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Laminated Bodies (AREA)
Description
- les deux flans de tôle métallique sont chacun revêtus sur au moins une de leurs faces, et on superpose les deux flans de tôle de manière qu'une face revêtue du premier flan de tôle soit en contact avec une face revêtue de l'autre flan de tôle,
- on fait passer le courant électrique de brasage entre le poinçon et la matrice lorsque ledit poinçon est en fin de course,
- l'intensité du courant électrique de brasage est telle qu'elle permet d'obtenir dans le point d'assemblage à l'interface entre les deux flans de tôle, par effet Joule, une température comprise entre la température de fusion du revêtement métallique moins 20 % et la température de fusion du revêtement métallique, de préférence comprise entre la température de fusion du revêtement métallique moins 20 % et la température de fusion du revêtement métallique moins 10 %,
- le revêtement métallique est un revêtement à base de l'un ou plusieurs éléments parmi le zinc, l'aluminium, le nickel et leurs alliages.
- les figures 1 à 3 représentent trois étapes de réalisation d'un point d'assemblage de deux flans de tôle selon le procédé de l'invention,
- la figure 4 représente une vue en perspective coupée d'un point d'assemblage selon l'invention.
Claims (6)
- Procédé d'assemblage de deux flans de tôle métallique (1, 2) dont un au moins est revêtu sur au moins une de ses faces d'un revêtement métallique (3), dans lequel on superpose les deux flans de tôle (1,2) et on réalise au moins un point d'assemblage par fluage à froid du type dans lequel on pratique simultanément dans les deux flans de tôle (1, 2) à l'aide d'un poinçon (8) et d'une matrice (6) une cavité (9, 10), lesdites cavités étant ainsi logées l'une dans l'autre et présentant au voisinage du fond un élargissement (11), caractérisé en ce qu'on superpose les deux flens de tôle (1, 2) de manière que la face revêtue du flan de tôle revêtu soit en contact avec une face de l'autre flan de tôle, et en ce qu'on fait passer entre le poinçon (8) et la matrice (6) un courant électrique de brasage dudit point d'assemblage.
- Procédé d'assemblage selon la revendication 1, caractérisé en ce que les deux flans de tôle métallique (1, 2) sont chacun revêtus sur au moins une de leurs faces, et en ce qu'on superpose les deux flans de tôle (1, 2) de manière qu'une face revêtue du premier flan de tôle soit en contact avec une face revêtue de l'autre flan de tôle.
- Procédé selon l'une des revendications précédentes, caractérisé en ce qu'on fait passer le courant électrique de brasage entre le poinçon (8) et la matrice (6) lorsque ledit poinçon est en fin de course.
- Procédé selon l'une des revendications précédentes, caractérisé en ce que l'intensité du courant électrique de brasage est telle qu'elle permet d'obtenir dans le point d'assemblage à l'interface entre les deux flans de tôle (1, 2), par effet Joule, une température comprise entre la température de fusion du revêtement métallique moins 20 % et la température de fusion du revêtement métallique.
- Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'intensité du courant électrique de brasage est telle qu'elle permet d'obtenir dans le point d'assemblage à l'interface entre les deux flans de tôle (1, 2), par effet Joule, une température comprise entre la température de fusion du revêtement métallique moins 20 % et la température de fusion du revêtement métallique moins 10 %.
- Procédé selon l'une des revendications précédentes, caractérisé en ce que le revêtement métallique est un revêtement à base de l'un ou plusieurs éléments parmi le zinc, l'aluminium, le nickel et leurs alliages.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9413337A FR2726494B1 (fr) | 1994-11-08 | 1994-11-08 | Procede d'assemblage de deux flans de tole metallique |
FR9413337 | 1994-11-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0711614A1 EP0711614A1 (fr) | 1996-05-15 |
EP0711614B1 true EP0711614B1 (fr) | 1998-04-15 |
Family
ID=9468589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95401925A Expired - Lifetime EP0711614B1 (fr) | 1994-11-08 | 1995-08-22 | Procédé d'assemblage de deux flanes de tÔle métallique |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0711614B1 (fr) |
AT (1) | ATE165023T1 (fr) |
DE (1) | DE69502072T2 (fr) |
ES (1) | ES2116698T3 (fr) |
FR (1) | FR2726494B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5602960B1 (ja) * | 2014-01-16 | 2014-10-08 | 武延 本郷 | 接合治具、接合体の製造方法、及び、接合体 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2510365T3 (es) * | 2011-03-23 | 2014-10-21 | Smp Deutschland Gmbh | Conjunto de material híbrido y un procedimiento y un dispositivo para su fabricación |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2691388A1 (fr) * | 1992-05-21 | 1993-11-26 | Homax Ag | Nouveau point d'assemblage de flans de tôle par fluage à froid et machine d'outils pour la réalisation d'un tel point d'assemblage. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63132733A (ja) * | 1986-11-25 | 1988-06-04 | Toyota Motor Corp | 通電かしめ方法 |
JPH0475731A (ja) * | 1990-07-05 | 1992-03-10 | Sumitomo Light Metal Ind Ltd | アルミニウム製ろう付ハニカムパネルの製造方法 |
JP2514481B2 (ja) * | 1991-05-28 | 1996-07-10 | 村井 正輔 | 金属板の溶接方法および溶接位置決め用突起体の形成方法 |
-
1994
- 1994-11-08 FR FR9413337A patent/FR2726494B1/fr not_active Expired - Fee Related
-
1995
- 1995-08-22 ES ES95401925T patent/ES2116698T3/es not_active Expired - Lifetime
- 1995-08-22 AT AT95401925T patent/ATE165023T1/de not_active IP Right Cessation
- 1995-08-22 EP EP95401925A patent/EP0711614B1/fr not_active Expired - Lifetime
- 1995-08-22 DE DE69502072T patent/DE69502072T2/de not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2691388A1 (fr) * | 1992-05-21 | 1993-11-26 | Homax Ag | Nouveau point d'assemblage de flans de tôle par fluage à froid et machine d'outils pour la réalisation d'un tel point d'assemblage. |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5602960B1 (ja) * | 2014-01-16 | 2014-10-08 | 武延 本郷 | 接合治具、接合体の製造方法、及び、接合体 |
Also Published As
Publication number | Publication date |
---|---|
FR2726494A1 (fr) | 1996-05-10 |
ES2116698T3 (es) | 1998-07-16 |
DE69502072D1 (de) | 1998-05-20 |
FR2726494B1 (fr) | 1996-12-13 |
ATE165023T1 (de) | 1998-05-15 |
DE69502072T2 (de) | 1998-12-10 |
EP0711614A1 (fr) | 1996-05-15 |
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