CN117836074A - Folding head for folding an edge of a metal sheet by 180 DEG, with an application roller, and associated folding method - Google Patents
Folding head for folding an edge of a metal sheet by 180 DEG, with an application roller, and associated folding method Download PDFInfo
- Publication number
- CN117836074A CN117836074A CN202280057719.1A CN202280057719A CN117836074A CN 117836074 A CN117836074 A CN 117836074A CN 202280057719 A CN202280057719 A CN 202280057719A CN 117836074 A CN117836074 A CN 117836074A
- Authority
- CN
- China
- Prior art keywords
- folding
- edge
- support
- head
- application roller
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 10
- 230000008878 coupling Effects 0.000 claims description 22
- 238000010168 coupling process Methods 0.000 claims description 22
- 238000005859 coupling reaction Methods 0.000 claims description 22
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 description 6
- 230000007306 turnover Effects 0.000 description 2
- 238000009963 fulling Methods 0.000 description 1
- 238000009957 hemming Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention relates to a folding head (8) for folding an edge (2.1) of a metal sheet (2), comprising: a support (10); a contact surface for contact with the edge (2.1), which is fixed to the support (10) and can fold the edge (2.1) when moving along the edge; an application roller (14) for applying to the mould (6), said application roller being fixed to the support (10); the contact surface extends along a curved contour on the folding blade (12) and is configured for folding the edge (2.1) in a folding direction by at least 160 ° against the other edge (4.1) of the other metal plate (4); and, the application roller (14) is rotatable with respect to the support (10) about a fixed axis.
Description
Technical Field
The present invention claims priority from french application 2108851 filed at month 8 of 2021, the contents of which (text, figures and claims) are incorporated herein by reference.
The present invention relates to the field of press forming, in particular of body elements of motor vehicles, more particularly by folding.
Background
Published patent document WO2017/144791A1 discloses a folding method for folding an edge of a metal sheet against another edge of another metal sheet in order to implement hemming-splicing of said edge and said other edge by moving a folding head along the relevant edge by an automated arm. The folding head includes a blade having a curved contact surface configured to fold the edge against the other edge. The lateral profile of the contact surface has a change in inclination (about 180 °) along the surface so as to enable the edge to be folded 180 ° around the side edge of the other edge. A single pass of the associated blade along the edge may thereby fold the edge against the other edge.
In the hem-splice described above, the turning motion of the edge around the side of the other edge may lack precision in the height of the 180 ° fold, mainly due to the difference in stiffness in different directions of the automated arms used to move the folding head.
Published patent document EP1685915A1 discloses a folding head capable of edge folding-splicing two metal sheets by folding one of the edges over approximately 90 ° to the other of the edges. The folding head comprises two rollers having different inclination angles so that a first fold is performed with a first roller and a second fold is performed with a second roller. The edge is thereby folded against the other edge in a single pass of the folding head. The first roller is fitted to be slidable on a support of the folding head against an elastic force or controlled by a hydraulic jack so as to be able to follow a non-rectilinear edge of the edge to be folded. The application roller is integral with a first roller on the sliding support so as to ensure the following of said non-rectilinear edge. This solution is advantageous, but does not allow optimal control of the position of the folds, since the first roller and the second roller are limited to folding over the edges previously folded by approximately 90 °.
Disclosure of Invention
The object of the present invention is to overcome at least one of the drawbacks of the prior art mentioned above. More specifically, the aim of the invention is to allow hemming-in of two metal sheet edges, one of which is folded over approximately 180 ° onto the other, with better control over the height of the 180 ° fold so formed.
The present invention aims to provide a folding head for folding the edges of a metal sheet, said folding head comprising a support; a contact surface in contact with the edge, the contact surface being fixed to the support and capable of folding the edge when moving along the edge; the laminating roller is used for laminating on the die and is fixed with the supporting piece; wherein the contact surface extends along a curved contour on the folding blade and is configured for folding the edge in a folding direction by at least 160 ° against the other edge of the other metal plate; and, the applicator roller is rotatable about a fixed axis relative to the support.
According to an advantageous mode of the invention, the folding head comprises a coupling part for coupling with an automation arm, the support being translationally movable with respect to the coupling part against an elastic force.
According to an advantageous mode of the invention, the support is movable in translation in the turnover direction with respect to the coupling part.
According to an advantageous mode of the invention, the coupling part comprises a fixing flange extending along a transverse plane preferably perpendicular to the folding direction.
According to an advantageous mode of the invention, the coupling part comprises a protruding portion, which is translationally and movably engaged with the elongated section of the support.
According to an advantageous mode of the invention, the protruding section forms a cylinder and the elongated section forms a pin slidably engaged in the cylinder.
According to an advantageous mode of the invention, the application roller is oriented to be applied to the mould in the folding direction.
According to an advantageous mode of the invention, the application roller is rotatable with respect to the support about a fixed axis and is oriented in a vertical direction perpendicular to the turning direction or inclined by 15 ° or less with respect to the vertical direction.
According to an advantageous mode of the invention, the application roller is position-adjustable in the folding direction with respect to the support by means of one or more thickness shims.
The present invention is also directed to a folding method for folding an edge of a metal plate, the folding method comprising the steps of: (a) disposing the metal plate on a mold; (b) Disposing another metal plate on the metal plate with another edge adjacent to the edge; (c) Folding the edge against the other edge by moving a folding head along the edge; characterized in that the folding head is a folding head according to the invention and in step (c) the movement of the folding head comprises a continuous rolling of the application roller on the mould along the edge.
Advantageously, in step (c), said edge is folded at least 160 °.
Advantageously, the metal plate is the outer wall of a roof window of a motor vehicle, and the edges are previously folded by 90 ° (with a tolerance of ±20°) and delimit an opening of the roof. Advantageously, the further metal sheet is an inner lining of a roof window of a motor vehicle, and the further edge is previously folded by 90 ° (with a tolerance of ±20°) and delimits an opening of the roof.
The measure of the invention is advantageous in that it enables hemming of two sheet metal edges to be carried out by effectively and controllably folding and tucking one of the so-called edges onto the other of the edges, which involves the height of the edges so folded and tucked. The use of a folding blade with a left-hand curved contact surface is advantageous in that it enables folding and folding over approximately 180 ° in one pass, unlike folding rollers, in that each of the cylindrical annular contact surfaces of the folding rollers is only capable of folding the edge through a limited angle, typically up to 45 °. The fact of providing an application roller fixed with respect to the folding blade thus enables to control the position of the contact surface on the folding blade with respect to the rest of the metal sheet and thus the geometry of the edges so folded and folded.
Drawings
FIG. 1 is a cross-sectional view of two metal sheet edges hemmed-bound in accordance with the present invention;
FIG. 2 is a perspective view of an outer wall and an inner liner of a roof skylight of a motor vehicle, the outer wall and edges of the inner liner being hemmed in by movement of a folding head;
fig. 3 is a cross-sectional view of the folding head of fig. 2.
Detailed Description
FIG. 1 is a cross-sectional view of two sheet metal edges hemmed by folding one of the edges into abutment against the other of the edges.
The metal sheet 2 comprises an edge 2.1 which is previously folded by approximately 90 ° during the forming operation for carrying out the forming on the stamping machine, for example by "sagging". The other metal plate 4 also comprises an edge 4.1 which is folded in advance approximately 90 ° like the edge 2.1 and is arranged against said edge 2.1. The edge 2.1 is folded 180 ° around the side edge 4.2 of the other edge 4.1 and folded back against said other edge, whereby a 180 ° fold 2.2 and a folded back section 2.3 are formed. The edge 2.1 before folding and folding is shown in broken lines and corresponds to the 180 ° fold and folded section 2.3. Folding and folding over of the edge 2.1 can be performed by pressing on the side edge 4.2 of the other edge 4.1, but this results in the height H of the folded-over edge 2.1 being determined by the height of the other edge 4.1. However, the other edge may have a height that varies along its extension, thereby resulting in a non-constant height H along the edges 2.1 and 4.1 so hemmed-joined.
It is desirable to obtain a constant height H of the folded-over edge 2.1 controlled along its extension. To this end, the invention is designed such that the relevant edge 2.1 is folded around the other edge 4.1 and folded back against said other edge with a gap in the bottom of the groove formed by the 180 ° fold 2.2, as shown in fig. 1. This method can thus be freed from the height tolerance of the other edge 4.1. For this purpose, the edge 2.1 is folded around the other edge 4.1 and folded back against said other edge by means of the folding head and corresponding method shown in fig. 2 and 3.
Fig. 2 is a perspective view of the outer wall 2 of the roof hatch of a motor vehicle and the inner lining 4, the edges of which are bound by the moving flaps of the folding head. The outer wall corresponds to the metal plate 2 of fig. 1 and the inner lining corresponds to the other metal plate 4 of fig. 1. The respective edges 2.1 and 4.1 visible in fig. 1 are shown in fig. 2 along the opening of the roof hatch, but are difficult to see. The metal plate 2 is arranged against a mould 6 which is specially sized and shaped for this operation.
The folding head 8 is applied against and moves along the edge to be folded in order to fold the edge and fold the edge back against the other edge in order to obtain the hem-splice shown in fig. 1. The folding head 8 is supported by an automated arm (not shown) well known to those skilled in the art.
Fig. 3 is a sectional view of the folding head 8.
The folding head 8 comprises a support 10 fixed with a folding blade 12 and a laminating roller 14. The folding blade 12 may be as disclosed in the publication WO2017/144791A1, that is to say it is formed substantially by a solid body having a contact surface in contact with the edge, said surface being curved on the left and substantially in a general direction parallel to the working direction of the blade. The relevant surface may correspond to a surface formed by a preferably rectilinear generatrix that moves in translation along the edge of the folding blade 12 while undergoing a rotation corresponding to the folding and turning of said edge. The change in inclination of the lateral profile of the contact surface (from the entrance area up to the exit area) corresponds substantially to the turnover angle that needs to be applied to the edge.
The folding head 8 further comprises a coupling part 16 for coupling with an automation arm. The coupling part 16 comprises a fixing flange 16.1 for fixing with the automation arm and a cylindrical portion 16.2 protruding from said fixing flange 16.1. The support 10 is mounted so as to be translationally movable on the coupling part 16 against the elastic force. In this case, the support 10 comprises a central portion 10.1, on which the blade 12 and the applicator roller 14 are fixed, and an elongated portion 10.2, which forms a pin that is slidably engaged in the cylindrical portion 16.2 of the coupling element 16. It can be observed that the pin comprises: a proximal section with a cylindrical outer surface, which is slidably fitted in a guide ring 16.3 fitted on the distal end of the cylindrical portion 16.2 of the coupling part 16; and a distal section supporting a slider 10.3 slidably fitted in the bore of the cylindrical portion 16.2 of the coupling part 16. In the compressed condition, the spring 18 is housed in the cylindrical portion 16.2 of the coupling element 16, with the first end against the abutment surface 16.4 of said cylindrical portion 16.2 and the second end against the abutment ring 10.4 fixed with the pin formed by the elongated portion 10.2 of the support 10. In this embodiment, the associated pin forms a shoulder against which the conformable ring 10.4 comes to rest. The spring 18 thereby exerts a resilient force on said support 10 via said abutment ring 10.4 and the elongated portion 10.2 of said support 10.
Referring to the detailed view of fig. 3, it can be observed that the folding blade 12 has a contact surface against the folded-over section 2.3 of the edge 2.1 of the metal plate 2 (which in this case corresponds to the outer skin of the roof) and against the other edge 4.1 of the other metal plate 4 (which in this case corresponds to the inner lining of the roof). The fold-over direction is thus vertical and parallel to the other edge 4.1. The application roller 14 is adjacent to the folding blade 12 and is configured to be applied to the mold 6 in a direction corresponding to the folding direction. Rather, the axis of rotation of the applicator roll 14 (which is shown by a generally horizontal axis) is perpendicular to the fold-over direction, which in this case is vertical or at least forms an angle of 15 ° or less with the perpendicular.
As the folding head 8 is moved along the edge 2.1 to be folded and folded over against the other edge 4.1, the application roller is applied against the reference surface of the mould 6 (which is adjacent to said edges 2.1 and 4.1) so as to regulate and command the height of the folding blade 12 and thus the contact surface of said folding blade with the edge 2.1. The contact is facilitated by the support 10 being fitted to be translatable on the coupling part 16 against the elastic force. When moving the folding head 8 along the edge 2.1, the automation arm fixed to the coupling part 16 can thus exert a force on the support 10 via the spring 18, which force is thus borne by the application roller 14 rolling on the mould 6. This elastic force thus ensures a permanent contact of the application roller 14 on the mould and thus a precise positioning of the contact surface of the folding blade 12 in the folding direction, when the folding head 8 is moved along the edge 2.1 to be folded and folded. These measures thus enable the groove bottom gap to be implemented in the 180 ° fold 2.2 of the edge 2.1 and thus the constant height H of the edge 2.1 to be implemented as discussed above with reference to fig. 1.
Note that sliding in the folding head 8 against the elastic force as described above is optional, as the movements performed by the automated arm may be accurate enough to ensure a durable contact of the application roller 14 against the mould. The robotic arm also has an inherent elasticity that can replace or supplement the movable assembly described above against the elastic force.
With further reference to the detailed view of fig. 3, it can be observed that the folding blade 12 is fitted on an intermediate piece 20 having an L-shaped profile, which enables the application roller 14 to be housed in the hollow of the L and directly adjacent to the folding blade 12 itself fixed to the end of the small branch of the L. The application roller 14 is fitted to the intermediate part 20 via a thickness shim 22 which ensures accurate and rigid positioning. The thickness shim 22 may thus be supplemented or replaced by one or more other thickness shims.
Still referring to the detailed view of fig. 3, it is observed that the mould 6 comprises two distinct portions (i.e. an inner portion 6.1 and an outer portion 6.2 adjacent to the inner portion 6.1), however it is understood that the mould may also be a single monolithic piece. The rolling surface 6.2.1 of the mould 6 (on which the laminating roller 14 rolls) is directly adjacent to the lateral laminating surface 6.2.2 of the edge 2.1 and is of a height relative to the forward laminating surface 6.1.1 of the metal plate 2. The rolling surface 6.2.1 is advantageously perpendicular to the lateral abutment surface 6.2.2 or inclined 15 ° or less with respect to the perpendicular. Of course, however, the rolling surface 6.2.1 may be at a different height relative to the forward abutment surface 6.1.1.
In the above description of the invention, the folding and turning-over amplitude of the edges of the metal plate is about 180 °. However, of course, the fold and flip amplitude may be weaker, for example up to 160 °. In this case, the edges of the metal sheet in the unfolded state may be pre-folded by a small angle, for example up to 20 °.
Similarly, the fold and tuck magnitudes may be greater, in which case the edges in the unfolded state may be pre-folded in an opposite direction relative to the tuck.
In both cases, the advantages of the present invention exist in view of the small value of the pre-folding angle.
Claims (10)
1. A folding head (8) for folding an edge (2.1) of a metal sheet (2), the folding head comprising:
-a support (10);
-a contact surface for contact with the edge (2.1), which is fixed with the support (10) and can fold the edge (2.1) when moving along the edge;
-an application roller (14) for applying on the mould (6), said application roller being fixed with the support (10);
it is characterized in that the method comprises the steps of,
the contact surface extends along a curved contour on the folding blade (12) and is configured for folding the edge (2.1) in a folding direction by at least 160 ° against the other edge (4.1) of the other metal plate (4); and
the application roller (14) is rotatable relative to the support (10) about a fixed axis.
2. Folding head (8) according to claim 1, comprising a coupling part (16) for coupling with an automation arm, the support (10) being translationally movable with respect to the coupling part (16) against an elastic force.
3. Folding head (8) according to claim 2, wherein the support (10) is translationally movable in the folding direction with respect to the coupling part (16).
4. A folding head (8) according to claim 2 or 3, wherein the coupling part (16) comprises a fixing flange (16.1) extending along a plane perpendicular to the folding direction.
5. Folding head (8) according to any one of claims 2 to 4, wherein the coupling part (16) comprises a protruding portion (16.2) which is translatably engaged with the elongated section (10.2) of the support (10).
6. The folding head (8) according to claim 5, wherein the protruding section (16.2) forms a cylinder and the elongated section (10.2) forms a pin slidably engaged in the cylinder.
7. A folding head (8) according to any one of claims 1 to 6, wherein the application roller (14) is oriented to apply on the mould in the folding direction.
8. The folding head (8) according to any one of claims 1 to 7, wherein the application roller (14) is rotatable about a fixed axis with respect to the support (10) and is oriented in a vertical direction perpendicular to the folding direction or inclined by 15 ° or less with respect to the vertical direction.
9. The folding head (8) according to any one of claims 1 to 8, wherein the application roller (14) is position-adjustable in the folding direction with respect to the support (10) by means of one or more thickness shims (22).
10. A folding method for folding an edge (2.1) of a metal sheet (2), the folding method comprising the steps of:
(a) -arranging the metal plate (2) on a mould (6);
(b) -arranging a further metal plate (4) on the metal plate (2), with a further edge (4.1) adjacent to the edge (2.1);
(c) -folding the edge (2.1) against the other edge (4.1) by moving a folding head (8) along the edge (2.1);
-characterized in that the folding head (8) is a folding head according to any one of claims 1 to 9, and that in step (c) the movement of the folding head (8) comprises a continuous rolling of the application roller (14) on the mould (6) along the edge (2.1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2108851A FR3126324A1 (en) | 2021-08-24 | 2021-08-24 | 180° METAL SHEET EDGE FOLDING HEAD WITH SUPPORT ROLLER |
| FR2108851 | 2021-08-24 | ||
| PCT/FR2022/051477 WO2023025997A1 (en) | 2021-08-24 | 2022-07-22 | Head for folding the edge of a metal sheet by 180° with bearing roller and associated folding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117836074A true CN117836074A (en) | 2024-04-05 |
Family
ID=77821944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280057719.1A Pending CN117836074A (en) | 2021-08-24 | 2022-07-22 | Folding head for folding an edge of a metal sheet by 180 DEG, with an application roller, and associated folding method |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4392193A1 (en) |
| CN (1) | CN117836074A (en) |
| FR (1) | FR3126324A1 (en) |
| WO (1) | WO2023025997A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2108851A1 (en) | 1970-10-13 | 1972-05-26 | Mediations Sciente Centre | |
| JP2000005834A (en) * | 1998-06-24 | 2000-01-11 | Toyotomi Kiko Co Ltd | Successive form processing method for thin plate elasticity plastic material, flange part, and device to be used for it |
| DE102005004474B3 (en) | 2005-01-31 | 2006-08-31 | Edag Engineering + Design Ag | Beading device and crimping method for transferring a crimping web of a component about a crimping edge |
| US9352376B2 (en) * | 2011-05-24 | 2016-05-31 | Comau S.P.A. | Hemming head device and method |
| DE102014015020A1 (en) * | 2014-10-08 | 2015-04-23 | Daimler Ag | Method and tool for processing at least one sheet metal component |
| FR3047913B1 (en) | 2016-02-22 | 2018-02-23 | Peugeot Citroen Automobiles Sa | BLADE AND METHOD OF CRIMPING SHEETS |
| FR3097144B1 (en) * | 2019-06-14 | 2021-06-04 | Psa Automobiles Sa | Friction crimping tool |
-
2021
- 2021-08-24 FR FR2108851A patent/FR3126324A1/en active Pending
-
2022
- 2022-07-22 WO PCT/FR2022/051477 patent/WO2023025997A1/en active Application Filing
- 2022-07-22 EP EP22757314.4A patent/EP4392193A1/en active Pending
- 2022-07-22 CN CN202280057719.1A patent/CN117836074A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023025997A1 (en) | 2023-03-02 |
| EP4392193A1 (en) | 2024-07-03 |
| FR3126324A1 (en) | 2023-03-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7637134B2 (en) | Flanging with a leading and following flanging die | |
| JP4562648B2 (en) | Hemming machine | |
| JP4870479B2 (en) | Hemming processing method and hemming processing apparatus | |
| US6161410A (en) | Multi-axis roller hemmer | |
| EP0857525B1 (en) | Thin sheet forming dies | |
| EP0858847A1 (en) | Thin sheet forming dies | |
| JP4943666B2 (en) | Roll hemming processing method and processing apparatus | |
| EP2990134B1 (en) | Roller hemming processing device and roller hemming processing method | |
| JP4495184B2 (en) | Hemming processing apparatus and hemming processing method | |
| CA3082565C (en) | Bending machine | |
| CN117836074A (en) | Folding head for folding an edge of a metal sheet by 180 DEG, with an application roller, and associated folding method | |
| EP1238722B1 (en) | Negative-angle forming die | |
| US11118387B2 (en) | Door hinge mechanism for a vehicle | |
| EP1694462B1 (en) | Short-flanged sheet material forming and joining | |
| CN102601224A (en) | Side flanging die for outer board of rear cover of car | |
| EP0698430B1 (en) | Hemming fixture | |
| US11167334B2 (en) | Assembly for manufacturing a metal part and use of such an assembly | |
| KR102063044B1 (en) | Hemming system | |
| DE19947518C1 (en) | Edge folding method for joining aluminium sheet automobile body components has folding block pivoted or displaced linearly relative to folding bed before vertical movement for final folding | |
| CN108348973B (en) | Hemming tool for the edge of a bodywork element of a motor vehicle | |
| EP1212157B1 (en) | Flanging device for pre-flanging and flanging of components | |
| US20060225631A1 (en) | Roller type hemming apparatus | |
| DE102005042362A1 (en) | Folding device for a roller folding head of a roller folding device in the car industry comprises a support roller region formed by a holding-down roller region having a holding-down surface to form a folding and holding-down roller | |
| US20090084490A1 (en) | Device for Turning up a Tire-Building Component on a Tire-Building Drum | |
| CA2196929C (en) | Thin sheet forming dies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |