EP4329957A1 - Dispositif de sertissage de bords de tôles métalliques et procédé de sertissage associé - Google Patents
Dispositif de sertissage de bords de tôles métalliques et procédé de sertissage associéInfo
- Publication number
- EP4329957A1 EP4329957A1 EP22713982.1A EP22713982A EP4329957A1 EP 4329957 A1 EP4329957 A1 EP 4329957A1 EP 22713982 A EP22713982 A EP 22713982A EP 4329957 A1 EP4329957 A1 EP 4329957A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crimping
- edges
- support
- roller
- metal sheets
- 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- Withdrawn
Links
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
- B21D39/02—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 by folding, e.g. connecting edges of a sheet to form a cylinder
- B21D39/021—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 by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
Definitions
- This application relates to the field of tools for shaping and assembling sheet metal, in particular motor vehicle openings.
- the present application relates more particularly to a device for crimping metal sheet edges by folding one of said edges onto another of said edges, as well as a method for crimping metal sheet edges by folding one of said edges onto another. of said edges.
- the panels to be assembled are arranged superimposed on a die and the robotic arm moves the crimping tool along the edges to be crimped in order to fold and apply the edge of the first panel to an edge of the second panel in order to assemble them and subsequently assemble the panels together.
- a crimping blade also called a "ski"
- the friction of the crimping blade against the edges of the sheets to be crimped is significant and needs to be included in a force recovery matrix.
- a disadvantage of the current method of crimping using a blade is that the lateral crimping reaction forces are taken up in the die and the articulated arm of the robot, thus causing the robotic arm to bend.
- the robotic arm carrying the crimping tool rests on the die in order to follow the edges of the part to be crimped.
- a problem then arises when the dimensions of the part vary slightly with respect to the theoretical dimensions. Indeed, since the robotic arm cannot adjust the position of its crimping tool to the dimensions of the part, the crimping operation may be poorly performed, leading to assembly defects.
- An object of the invention is in particular to correct all or part of the drawbacks of the prior art by proposing a solution making it possible to crimp the edges of metal sheets by dispensing with the use of a force absorption die.
- the subject of the invention is a device for crimping the edges of metal sheets by folding one of said edges onto another of said edges, comprising:
- the crimping blade comprising a crimping twist having a direction of work
- the crimping device being remarkable in that it further comprises:
- At least one roller arranged on the support and configured to contact one of the metal sheet edges so as to take up a bending force exerted by the crimping blade during movement in the working direction.
- the at least one roller has a contact surface with the edge of metal sheets which is opposite to the crimping twist at a zone end of said crimping twist in the working direction, so that the force take-up is maximum at the end of bending.
- the crimping twist comprises a transverse profile with respect to the direction of work, presenting a variation of inclination along a total extent of the crimping twist which is between 120° and 180°. ° .
- the at least one roller is mounted adjustable relative to the support in a direction perpendicular to an axis of rotation of said at least one roller.
- the adjustable mounting of the at least one roller with respect to the support is so as to be able to vary the distance between a contact surface of said at least one roller with the edge of metal sheets and the twist crimping.
- the at least one roller comprises a hub engaging with the support with play in the direction of adjustment, compensated by inserting at least one shim between said hub and said support .
- the hub comprises a recess engaging with a protuberance of the support, the at least one shim being placed between two opposite faces of the recess and of the protuberance, respectively, said two faces and said at least one wedge being perpendicular to the direction of adjustment and located on the side of the crimping twist with respect to the protuberance of the support.
- the at least one roller comprises a plate covering the recess and fixed to the hub and to the protuberance of the support.
- Another object of the invention is a method for crimping edges of metal sheets, comprising an action of bending one of the edges of metal sheets onto another of said edges of metal sheets by relative movement of a crimping device along edges of metal sheets, the method being remarkable in that the crimping device is according to the invention and in that during the bending action, the edge subject to bending is contacted by the at least one roller and free support against a matrix.
- the metal sheets form a roof or an opening of a motor vehicle and the edges of the metal sheets delimit an opening in said roof or opening.
- FIG 1 represents a force recovery matrix known from the prior art
- FIG 2 shows an exemplary embodiment of a crimping device according to the invention
- FIG 3 shows an exemplary embodiment of a crimping device according to the invention
- FIG 4 illustrates an operation for crimping sheet metal edges according to the invention
- the crimping of the edges of metal sheets is obtained by folding a first edge of the sheets against a second edge of the sheets.
- sheet edge will designate the first sheet edge, subject to bending, which is folded against the second edge at the end of the crimping action, the second sheet edge on which the first edge is bent during the crimping action as well as the zone bordering the first edge of the sheets before crimping and which forms a new edge after the crimping action.
- FIG. 1 represents an exemplary embodiment of a matrix M known from the prior art.
- Metal sheets whose edges 31, 32 are intended to be crimped together, are superimposed on the matrix M. These sheets can form, for example, a roof or a motor vehicle opening and the edges 31, 32 of sheets delimit an opening in the roof or the opening.
- the matrix M comprises a removable part M1. Part M1 forms a force recovery matrix. The fact that this part is mobile or removable makes it easier to extract the part after crimping. Indeed, as explained above, during crimping, the friction of the twist of the crimping blade against the edges 31, 32 of metal sheets generates significant forces making the crimped part difficult to extract due to the lateral forces of reaction to the crimping taken up in the matrix. In figure 1, the lateral forces are represented by an arrow E.
- FIGS. 2 and 3 represent embodiments of a device 10 for crimping the edges of metal sheets according to the invention.
- the device 10 for crimping one of said edges 31 onto another of said edges 32 comprises a support 11 and at least one crimping blade 12 placed on the support.
- the crimping blade 12 is configured to crimp the edges 31, 32 of metal sheets by progressive folding during the movement of the crimping device 10 in the working direction, from one of said edges to another of said edges.
- a crimping blade 12 makes it possible to perform a crimping action in a single pass, thus reducing the manufacturing cycle.
- the crimping blade 12 comprises a contact surface with the edge of the sheets during their crimping and extends along a twisted profile. Subsequently, this contact surface of the crimping blade 12 with the edge 31 of sheet metal will be called “crimping twist”.
- the profile of the crimping auger 13 is configured to bend and fold the edge 31 of sheet metal over the other edge 32 of sheet metal when moving the crimping blade 12 along the edge of said metal sheets to be crimped.
- the folding of the edge 31 is obtained by friction of the crimping twist 13 against the edge 31 of sheet metal.
- the crimping auger 13 comprises a transverse profile, with respect to the direction of work, presenting a variation in inclination along a total extent of the crimping auger which is between 120° and 180°.
- a profile makes it possible to crimp the edges 31, 32 of metal sheets regardless of the value of the angle formed by the edge before crimping and the proximal zone of this edge 32 against which this edge 31 is folded down. outcome of the crimping action.
- the working direction of a crimping auger 13 is understood to mean the direction along which the crimping auger 13 is moved so that it can fold the edge 31 of one sheet over the edge 32 of the other sheet during the crimping operation of said edges 31, 32 of sheets.
- the crimping device 10 also comprises at least one roller 14 arranged on the support 11.
- the at least one roller 14 is configured to come into contact with the edge 31 of the sheet metal to be crimped during the crimping operation. .
- the function of at least one roller 14 is to take up the bending force exerted by the crimping blade 12 during its movement, in the working direction, along the edge to be crimped.
- the fact that the reaction to the force is taken up by the at least one roller 14 rather than by a force take-up die makes it possible to reduce the tooling costs since there is no longer any need for add a removable part to the sheet metal support.
- This solution also makes it possible to simplify the production of the sheet support on which are stacked the bodywork elements whose edges are intended to be crimped.
- the roller 14 is a cylinder, for example, metallic mounted rotatably on the support 11 around its axis of rotation.
- the roller can be a ball or roller bearing, a cylinder mounted on such bearings or any other equivalent device.
- the roller 14 may correspond to several cylinders stacked so as to increase the contact surface 15 of the roller 14. In this embodiment, the contact surface 15 of the roller 14 corresponds to its running zone.
- the crimping device 10 comprises several rollers 14 of which at least two axes of rotation have different directions, for example, in order to take up forces in several directions.
- the contact surface 15 of the roller 14 is opposite the crimping twist 13 at a final zone of the twist 12 in its working direction, so that the force take-up is maximum at the end. folding.
- final zone of the crimping twist 13 is understood to mean the zone of the twist through which the sheet edge 31 to be bent escapes on the other sheet edge 32 as a result of the displacement of the crimping blade 12 along the edges 31, 32 crimp.
- the roller 14 is mounted adjustable relative to the support 11 in the direction of the lateral force, that is to say in a direction perpendicular to the axis of rotation of said at least one roller.
- This embodiment thus makes it possible to vary the distance 21 between the contact surface 15 of the at least one roller 14 and the crimping twist 13.
- this makes it possible, for example, to adapt the distance 21 between the twist crimping 13 and the roller 14 depending on the thickness of the edges 31, 32 of the sheets to be crimped.
- the roller 14 comprises a hub 22 engaging with the support 11 with play in the direction of adjustment.
- the hub 22 of the roller 14 comprises an oblong hole 16 into which is inserted a means for fixing the roller 14 to the support 11.
- a means for fixing the roller 14 to the support 11. This may be a screw as illustrated in FIG. or any other equivalent means making it possible to temporarily fix the roller 14 on the support 11.
- the play 21 between the crimping twist 13 and the contact surface 15 of the roller 14 can be modified by loosening the hub fixing means and moving the roller 14 in the direction of the lateral force, perpendicular to the axis of rotation of the roller 14.
- the play 21 in the direction of adjustment is compensated by inserting one or more shims 23 between the hub 22 and the protuberance 24 of the support 11.
- the assembly of the shims thickness 23 between the support and the hub 22 prevents any movement of the hub 22 relative to the support 11 after adjustment of the distance 21 between the crimping twist 13 and the contact surface 15 of the roller 14.
- FIG. 3 represents an embodiment in which the support 11 of the crimping device 10 comprises a protuberance 24.
- the roller 14, for its part, comprises a recess in its hub 22 arranged to engage with the protuberance 24 of the support 11. Adjusting the clearance 21 between the auger 13 and the contact surface 15 of the roller 14 is provided by at least one shim 23 disposed between two opposite faces of the recess and the protrusion 24, located on the side of the crimping swirl 13 with respect to the protuberance 24 of the support 11.
- the force reaction is ensured by the roller 14 formed of two bearings stacked along their axis of rotation.
- the two opposite faces of the recess of the hub and of the protrusion 24 of the support 11 are oriented perpendicular to the direction of adjustment.
- the main faces of the shims 23 are oriented perpendicular to the direction of adjustment.
- the wedges 23 can be of the same thickness or of different thicknesses. According to one embodiment, the shims 23 are inserted on each side of the protuberance 24 between two opposite faces of the recess and of the protuberance 24.
- At least one roller 14 of the crimping device 10 comprises a plate 17 covering the recess of its hub 22.
- the plate 17 is fixed to the hub and/or to the protrusion 24, allowing thus ensuring the maintenance of the shims 23 inside the recess.
- the plate 17 comprises an oblong hole 16 into which is inserted the means for fixing the hub 22 of said at least one roller 14 on support 11.
- the adjustment of the distance 21 between the twist 13 and the contact surface 15 of the roller 14 can be carried out by removing the plate 17 and modifying the arrangement of the wedges 23 between the opposite faces of the protuberance 24 and the recess or by modifying the thickness of the shims 23.
- the crimping of one of the edges of the metal sheets on another edge of the sheets is carried out by a bending action during a relative movement of the crimping device along the edges 31, 32 of the metal sheets.
- the edge 31 subject to bending is in contact with the roller or rollers 14 of the crimping device 10 without resting against a force-absorbing die.
- the crimping device 10 is intended to be fixed on the head of an articulated arm of an assembly robot.
- the crimping action is performed by moving the crimping device using the robotic arm along the edges 31, 32 of metal sheets to be crimped.
- this solution makes it possible to improve the positioning precision of the crimping blade 12 with respect to the edges 31, 32 of the sheets to be crimped.
- the quality of the crimped elements is thus improved thanks to the adaptability of the trajectory of the crimping device 10.
- the crimping head is equipped with a presser 33 as illustrated in the Figure 4.
- the presser 33 is configured to hold the edges 31, 32 of sheets in position during the crimping action to prevent them from moving during their assembly.
- the crimping device 10 according to the invention is fixed with respect to the ground.
- the crimping device 10 can, for example, be fixed to a support or to a crimping head fixed to the ground.
- a robotic arm presents the edges 31, 32 of sheets to be crimped in the crimping device 10 according to the invention, between the contact surface 15 of the roller 14 and the crimping blade 12 then moves the metal sheets along their edges 31, 32 so as to assemble them together by bending.
- this solution also makes it possible to increase the flexibility of the crimping islands, thus limiting investments, and to reduce floor space.
- the invention can be implemented, for example, in the automotive field.
- the metal sheets can, for example, form a roof or an opening of a motor vehicle and the edges 31, 32 of the sheets form an opening in said roof or said opening.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2104492A FR3122344B1 (fr) | 2021-04-29 | 2021-04-29 | Dispositif de sertissage de bords de tôles métalliques et procédé de sertissage associé |
| PCT/FR2022/050444 WO2022229526A1 (fr) | 2021-04-29 | 2022-03-11 | Dispositif de sertissage de bords de tôles métalliques et procédé de sertissage associé |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4329957A1 true EP4329957A1 (fr) | 2024-03-06 |
Family
ID=76159621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22713982.1A Withdrawn EP4329957A1 (fr) | 2021-04-29 | 2022-03-11 | Dispositif de sertissage de bords de tôles métalliques et procédé de sertissage associé |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4329957A1 (fr) |
| FR (1) | FR3122344B1 (fr) |
| WO (1) | WO2022229526A1 (fr) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2104492A5 (en) | 1970-08-20 | 1972-04-14 | Aga Ab | Increasing sensitivity of radiochromatographic analyser - by use of grid above cathode |
| DE112005003561B4 (de) * | 2005-04-27 | 2012-01-19 | Honda Motor Co., Ltd. | Walz-Umschlagverfahren und Walz-Umschlagvorrichtung |
| DE102014015020A1 (de) * | 2014-10-08 | 2015-04-23 | Daimler Ag | Verfahren und Werkzeug zum Bearbeiten wenigstens eines Blechbauteils |
| FR3034330B1 (fr) * | 2015-04-03 | 2017-03-24 | Peugeot Citroen Automobiles Sa | Tete de sertissage entre deux toles d’un element de carrosserie automobile, munie d’un outil associant une rampe de forme et un galet. |
| FR3076230B1 (fr) * | 2018-01-04 | 2019-12-13 | Psa Automobiles Sa | Dispositif de sertissage. |
-
2021
- 2021-04-29 FR FR2104492A patent/FR3122344B1/fr active Active
-
2022
- 2022-03-11 EP EP22713982.1A patent/EP4329957A1/fr not_active Withdrawn
- 2022-03-11 WO PCT/FR2022/050444 patent/WO2022229526A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3122344B1 (fr) | 2023-04-07 |
| FR3122344A1 (fr) | 2022-11-04 |
| WO2022229526A1 (fr) | 2022-11-03 |
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