EP1420907B1 - Flanging method for application of a flanged edge to a workpiece by roll folding comprising at least two folding steps - Google Patents

Abstract

The invention relates to a flange device (1), for production of a flanged edge (2) to a workpiece (3, 4), by roll folding, with at least two folding steps. An articulated arm robot has one robot arm to which a machine unit (9) is connected. A folding roller (10), in the form of a pressure roller is rotatably mounted on the controlled, moving machine unit (9), which may be rolled along in contact with the flanged edge (2), applying pressure at a set angular position for production thereof. A support element (11), arranged opposite the flanged edge, is further provided for the folding roller (10). According to the invention, the support element (11), rotatably mounted on the machine unit (9) in the form of a support roller, in the region of the folding roller (10), comprises a support roller edge (16) around the circumference thereof, which may be rolled along the folding line (22) of the flanged edge (2) as support for the positionally-accurate formation thereof, at least during the first folding step.

Description

The invention relates to a method for folding over a flanged edge of a workpiece by Rollfalzen with at least two folding steps according to the preamble of claim 1. Such a method is disclosed in JP-A-01249222.

A known flanging device for folding over a flanged edge by means of roll creases (EP 0 525 759 B1) comprises a tool unit which can be moved in a controlled manner by means of an articulated arm robot. On the tool unit a folding roller is rotatably mounted, which is rollable under pressure application and with certain angular position along and in contact with the flanged edge to the assignment.

The workpiece with the folded edge already folded by about 90 ° before the folding operation is inserted into a folding bed for holding the workpiece and to support the entire length of the flanged edge. In addition, the production of a joint connection between two sheet metal components is shown here, wherein the crimping edge of the crimping edge of an outer sheet metal component is crimped around an edge of a second sheet metal component.

The folding process takes place here in two stages, by the cylindrical seaming roller guided under pressure with an angle of attack in such a way along the flanged edge is that this is folded in a first folding step as Vorfalzung starting from the already bent by 90 ° flanged edge by another 45 °. Subsequently, the cylindrical folding roller is pivoted with its roller axis for a second folding stage, such that for a Endfalzung the flanged edge is completely folded over by 180 °.

In this folding operation is thus assumed that a workpiece in which the flanged edge is already beforehand and regardless of the Rollfalzvorgang beveled by 90 ° available. By this previous fold the bending line and bending edge of the flanged edge is formed before the Rollfalzvorgang and determined in their position. In the subsequent, two-stage Rollfalzvorgang thus the flanged edge is further bent around the already predetermined bending line.

With this device, however, it is not possible, starting from a not previously bevelled edge of the workpiece in a first folding step form a predetermined, positionally accurate, clean Abkantlinie, as would not form here against the pressure of the folding roller unsupported bending line at the beginning of the folding process irregular.

Further, a device for producing a joint connection is known (EP 0 904 167 B1), to which a flanged edge is folded by processing by 180 °, wherein a reinforcing member is connected when joining a vehicle roof in the region of a sliding roof section. The fold of the sheet metal flange or the flanged edge must be done on a dimensionally exactly predetermined bending line. The joint connection is carried out here by bending operations by means of expensive Füllschieber and folding jaws.

Further, a flanging device for folding over a flanged edge by Rollfalzen is known in which a number of folding rollers are arranged with different angular positions one behind the other on a tool unit. These Crimping device is used to convert a flanged edge of a sheet metal part to a stable edge flange of a workpiece by 180 °. The peripheral edge of the stable edge flange serves as a support for the formation of a correspondingly defined bending line. For joining joints of sheet metal parts with about the same sheet thickness and about the same bending behavior, this device is not suitable because the roll seams both the flanged edge of a sheet metal part and the edge flange of the other sheet metal part would bend undefined.

The object of the invention is to develop a generic flanging so that in a multi-stage folding from a flat edge region of a workpiece in a first folding step a dimensionally predetermined, exact Abkantlinie is formed with a correspondingly dimensionally predetermined position of the flanged edge.

This object is achieved with the features of claim 1.

With the method it is achieved that the Abkantlinie is supported in its formation exactly opposite to the folding roller by the co-moving support roller edge, whereby a correspondingly accurate and clean bending edge is obtained. In particular, thus a linear straight Abkantlinie can be accurately formed. However, bent bending lines according to given curves are also advantageously possible. The bending process is fast, easy and inexpensive feasible by means of an articulated arm robot.

Advantageously, the Falzrollendrehachse and the support roller rotation axis are in a transverse plane to the flanged edge, so that the contact points of the folding roller and the support roller are located directly opposite to the flanged edge.

In order to enable threading the flanged edge between the folding roller and the support roller, it is preferably proposed to support the support roller rotatably fixed and the folding roller controlled to be stored on the tool unit. For this purpose, the folding roller is rotatably mounted on a Falzrollenträgerteil, wherein the Falzrollenträgerteil by means of an actuator from a basic position with a mutual distance between the folding roller and support roller in a functional position, in which abut the folding roller and the support roller edge at the flanged edge, is displaced controlled.

Suitably, the folding roller is brought in a linear sliding movement of the support roller, with a guide carriage assembly which is adjustable by an electric and / or hydraulic and / or pneumatic drive. The support roller may be disk-shaped, preferably flat double-cone-shaped, wherein the peripheral edge then forms directly the support roller edge. The folding roller is preferably made cylindrical in the region of its rolling surface, with a rolling surface width corresponding to the crimping edge width, whereby a good folding result is achieved. In particular, in a double-cone-shaped design of the support roller, a conical surface opposite to the rolling surface of the folding roller can also be used as a contact surface for the flanged edge during the folding operation. A flat contact with the support roller in addition to the system on the support roller edge is not required for each use.

The folding process is carried out in a proven sequence according to claim 2 such that in a first folding step, the adjacent rolling surface of the folding roller is guided at an angular position of about 30 ° for a corresponding Bördelkantenumbiegung by 30 ° along with the support roller along the flanged edge. By means of the articulated arm robot, the tool unit is controllably controlled for a second folding step so that the adjacent rolling surface of the folding roller is guided at an angular position of about 60 ° for a further Bördelkantenumbiegung to 60 ° along with the support roller on the Bördelkannte along. After these two folding steps the bending line and bending edge is stably formed in the predetermined manner, so that for further folding steps usually no support on the bending edge by a revolving support roller edge is required more. A further contribution of the flanged edge, for example to a total of 180 °, can then be carried out according to claim 3 by a further robot-controlled tool unit with a cylinder folding roller known per se.

It is expedient to use a combination of a cylindrical folding roller and an outwardly expanding cone folding roller, which are used successively in a further four folding steps. The cylindrical folding roller is used in a third and fourth folding step for a deflection of the flanged edge up to 90 ° or 120 °. The cone fold roller with a preferred cone angle of 45 ° is then used in a fifth and sixth folding step for a total of 150 ° throw or 180 ° for the final fold. The Zylinderfalzrolle and Kegelfalzrolle are expediently mounted opposite to the tool unit and brought as needed by the Gelenkarmroboter in its functional position to the flanged edge.

Reference to a drawing, the invention is explained in detail.

Fig. 1

eine schematische Darstellung eines ersten Verfahrensschrittes zum Umlegen einer Bördelkante eines Werkstücks durch Rollfalzen mit einer Bördelvorrichtung,

Fig. 2

eine schematische Darstellung eines zweiten Verfahrensschrittes, bei dem die Bördelkante um weitere 30° umgelegt wird,

Fig. 3

eine schematische Darstellung eines dritten Verfahrensschrittes, bei dem die Bördelkante um etwa 90° bezogen auf die Ausgangsstellung umgelegt ist,

Fig. 4

eine schematische Darstellung eines vierten Verfahrensschrittes, bei dem die Bördelkante um etwa 120° bezogen auf die Ausgangsstellung umgelegt ist,

Fig. 5

eine schematische Darstellung eines fünften Verfahrensschrittes, bei dem die Bördelkante um etwa 150° bezogen auf die Ausgangsstellung umgelegt ist,

Fig. 6

eine schematische Darstellung eines sechsten und letzten Verfahrensschrittes, bei dem die Bördelkante um volle 180° umgelegt ist, und

Fig. 7

eine schematische Prinzipdarstellung eines Roboters der Bördelvorrichtung.

Show it:

Fig. 1

a schematic representation of a first method step for folding a flanged edge of a workpiece by Rollfalzen with a hemming,

Fig. 2

a schematic representation of a second method step, in which the flanging edge is folded over by a further 30 °,

Fig. 3

a schematic representation of a third method step, in which the flanged edge is folded by about 90 ° relative to the starting position,

Fig. 4

a schematic representation of a fourth method step, in which the flanged edge is folded by about 120 ° relative to the starting position,

Fig. 5

a schematic representation of a fifth method step, in which the flanged edge is folded by about 150 ° relative to the starting position,

Fig. 6

a schematic representation of a sixth and final method step, in which the flanged edge is folded over a full 180 °, and

Fig. 7

a schematic diagram of a robot of the hemming.

1 shows schematically a flanging device 1 for folding over a flanged edge 2 of a first sheet-metal component 3 around an edge 5 of a second sheet-metal component 4 by means of rolled seams. The first sheet-metal component 3 and the second sheet-metal component 4 form an example of a frame of a sunroof cutout, in which the edge 5 of the second sheet metal component 4 form a wall 6 of a channel 7 when the folded edge 2 of the first sheet metal component 3 is folded over, as shown particularly in FIG it can be seen in which the flanged edge 2 is completely crimped around the edge 5 of the second sheet metal part 4.

The first sheet metal component 3 and the second sheet metal component 4 together form a workpiece and are held in a folding bed 8 of the hemming apparatus 1.

The individual folding steps for producing the flanged workpiece shown in FIG. 6 are shown in FIGS. 1 to 6 and are discussed in more detail below:

FIG. 1 shows a controlledly movable tool unit 9, which is part of a robot arm 25 of an articulated arm robot shown schematically in FIG. 7. On the controlled movable tool unit 9, a rotatably mounted folding roller 10 is arranged as a pressure roller under pressure application and with certain angular position along and in contact with the flanging edge 2 to the assignment can be rolled.

7, a rotatably mounted support roller 11 is also arranged on the tool unit 9 as a support element which is arranged in the region of the seaming roller 10 and with respect to the flanging edge 2 opposite the seaming roller 10.

The support roller 11 is disc-shaped and flat double-cone-shaped, while the folding roller 10 is formed in the region of its rolling surface 12 is cylindrical with a rolling surface width corresponding to the flanged edge width. A folding roller rotation axis 13 and a support roller rotation axis 14 lie in a transverse plane to the extension direction of the flanging edge 2.

The support roller 11 is fixedly rotatably supported by a support arm 26 on the tool unit 9, while the folding roller 10 is rotatably mounted on a Falzrollenträgerteil 15. The support arm 26 and the Falzrollenträgerteil 15 form an approximately U-shaped structure. The folding roller support member 15 is movably mounted on the tool unit 9 and controlled by an actuator, not shown, from a basic position to a functional position shown in FIG. 1 is displaced, in which the folding roller 10 with its cylindrical rolling surface 12 and the support roller 11 with a support roller edge 16 abut the beaded edge. As can be seen from Figs. 1 and 2, the flanging edge 2 is clamped above the Abkantlinie 22 between a conical surface 23 of the support roller 11 and the rolling surface 12 of the seaming roller 10.

The folding roller carrier part 15 is preferably mounted on the tool unit 9 via a guide slide arrangement 24 for a linear displacement and can be adjusted by an electric and / or hydraulic and / or pneumatic drive.

As can further be seen from FIG. 1, in the first folding step, the support roller edge 16 is unrolled along the bending line of the flanged edge 2 in support of its positionally accurate formation. In this first folding step, the rolling surface 12 of the folding roller 10 is guided at an angular position of about 30 ° for a corresponding Bördelkantenumbiegung by 30 ° along with the support roller 11 at the flanging edge 2 along.

The tool unit 9, as can be seen from FIG. 2, is controlled in such a way that, in a second folding step, the adjacent rolling surface 12 of the folding roller 10 with an angular position of approximately 60 ° for a further edge deflection to 60 ° together with the support roller 11 is guided along the flanged edge 2 along.

As can be seen further from FIGS. 3 to 6, for a further flanging edge bending to a total of 180 ° instead of the tool unit 9, a further, second, robot-guided tool unit 17 is now provided, which has a cylindrical folding roller 18 and a conical folding roller 19 which widens outwards ,

As can be seen in FIGS. 3 and 4, an adjacent rolling surface 20 of the cylindrical folding roller 18 is at an angular position with respect to the original starting position of the flanging edge 2 at a third folding step (FIG. 3) of 90 ° and in a fourth folding step (FIG 4) of 120 °.

Subsequently, as can be seen in FIGS. 5 and 6, an abutting rolling surface 21 of the cone folding roller 19 is rotated at an angular position at a fifth folding step (FIG. 5) of 150 ° and in a sixth folding step (FIG ° led. As a result, the flanging is produced and a joint connection between the first sheet metal component 3 and the second sheet metal component 4 can be produced.

Claims (3)

1. Process for putting a border on a workpiece through roller folding with at least two folding stages, in which a border (2) of a first sheet metal part (3) of the workpiece is bordered, by means of a bordering process (1), around the rim (59) of a second sheet metal part (4) of the workpiece, whereby a flanging roller (10), as a platen supported, such that it can rotate, on a controllably mobile tool unit of a robot arm of a link bracket robot, is rolled, applying pressure, in a specific angular setting, along the border, lying on it, in order to put the given rim on, and whereby a supporting roller (11), associated with the fold roller (10) and disposed opposite the border rim, and supported, such that it can rotate, on the tool unit (9), in the area of the fold roller (10), the said support roller (11) having, on the periphery, a surrounding supporting roller rim (16), is rolled, in a folding stage, with this support roller rim (16), along an angling line (22) of the of the border rim (2),
   characterized in that,
   before the folding stages, both sheet-metal parts (3, 4) are inserted into a folding bed (8) of the bordering device and are there held together, and
   in that, before the border rim (2) is bent round, the support roller (11) is then supported, with its support roller rim (16), on the border rim (2), so that the angling line (22) is formed, as a bent rim, in the correct position, in the first folding stage, by means of the supporting roller rim (16) that moves with the folding roller (10).
2. Process in accordance with claim 1, characterized in that,
   in a first folding stage, the adjoining roll-round face (12) of the folding roller (10) is directed, together with the supporting roller (11), along the border rim (2) at an angle of approximately 30°, for a corresponding rim angling of 30°, and
   in that the tool unit (9) can be controllably shifted such that, in a second folding stage, the adjoining roll-round face (12) of the supporting roller (11) is directed, together with the supporting roller (11), and at an angular setting of 60°, along the border rim (2), for a further border folding.
3. Process in accordance with claim 2, characterized in that,
   there is a further robot-guided tool unit (17), with a cylinder folding roller, and a conical folding roller (19) that extends outwards, that can be used in four further folding stages for further bending of the rim to a total of 180°,
   and in that the adjoining roll-round face of the cylindrical folding roller (18) is guided, in relation to the original position of the border rim (2), in a third stage, at an angle of 90° and, in a fourth folding stage, at an angle of 120°, and
   in that the adjoining roll-round face (21) of the conical folding roller (19) is directed, in a fifth folding stage, at an angular setting of 150° and, in a sixth folding stage, at an angle of 180°.

Images