EP1685915A1 - Hemming method with pre- and final hemming tool - Google Patents

Abstract

An edging device for bending an edging land (2) of a component (1) round a flanging edge (3), comprises (a) a tool head (5) and (b) a first edging form (11; 14) and a second edging form (12; 13) carried simultaneously by the tool head (5) in the working position and mounted one after the other in a working direction (L). An independent claim is also included for a method for forming an edge, in which (a) a tool head with forms as above is moved along the edge (3) in a working run, preferably with one of the forms (11, 12; 13, 14) being moveable across the edge (3) (relative to the other), (b) the front-running form (11; 13) turns the land over the edge and the following form (12; 14) turns it over further in the same run.

Description

The invention relates to a device and a method for flanging, preferably roll flanging, a component. The device and the method are preferably used for folding, particularly preferably roll-folding. The invention can be used in particular in vehicle construction, preferably motor vehicle construction. As reshaped components are in particular body parts in question, for example, a door, a wheel arch or another part of an outer side wall, the front or the rear of a motor vehicle.

From WO 03/02464 A1 a Rollfalzvorrichtung is known with three folding rollers, which are used successively in several runs and this can be selectively brought into a working position in which they fold on a Falzsteg the Falzsteg. In order to completely fold over the fold web around a folded edge, three work runs are required with the known device, between which the respective next folding roll must be brought into its working position.

It is therefore an object of the invention to reduce the time required for a multi-level flanging, preferably roll flanging and thereby the cost of flanging.

The invention relates to a crimping device which comprises a tool head, a first crimping form and at least one further, second crimping form which are movable in a working direction along a crimping edge of the component in order to successively change the crimping ridge during crimping onto a crimping web of a component to transfer a flanged edge. The tool head serves as a carrier for the at least two flanged forms. The first and second flanging form are arranged on the tool head so that they simultaneously occupy their respective working position, ie the one the crimping forms in one run as Vorbördelform and the other serves in the same work as trailing Nachbördelform. Preferably, the tool head serves as a carrier only for two flanged forms. Furthermore, it is preferred if the Nachbördelform comes as a Fertigbördelform used. In principle, however, it is possible that downstream of the Vorbördelform a further crimping form is carried by the tool head, wherein in the case of the intermediate crimping this expediently occupies its working position simultaneously with the other two crimping forms, while in the case of upstream or downstream flanging this occupy their working position together with the other two flared forms or in an alternative embodiment before or after performing a run of at least two flanged into the working position and the at least two flanged from the working position can be moved, or vice versa.

The crimping forms part of the common tool head and are moved uniformly during movements of the tool head, which not only two crimping can be performed in a single run in a short time, but also a single movable in space actuator is sufficient as a platform. The effort to be used to control the movement of the actuator corresponds to the effort that was previously required to operate for only one crimping roller per cycle. The crimping forms are mechanically fixed relative to one another at least during the working cycle in a plurality of degrees of freedom and therefore can not be moved relative to one another by means of a control with respect to these degrees of freedom, a mechanical fixing also meaning a fixing by means of a hydraulic or pneumatic force. In particular, the crimping should be relatively fixed with respect to the orientation, ie their angular position. A translational mobility of one of the crimping rollers, preferably a linear movement along a single axis or a maximum of two-dimensional mobility, however, is advantageous. However, parallel to the working direction, the crimping forms are preferably fixed relative to one another and therefore immobile, at least during the working cycle.

The flare can in a simple design on the tool head in a fixed, d. H. be arranged always or at least during the common run unchangeable position. As a position of a crimping roller, the invention always understands the location and / or orientation of the crimping roller. The positions can be absolutely unchanging. Alternatively, at least one of the flanging molds between two work runs can be adjustably arranged on the tool head in a state that is withdrawn from the component in order to be able to adapt the tool head to different components.

In preferred embodiments, the first flanging form is arranged movably on the tool head so that its position, namely its orientation or preferably its location relative to the second flanging form, can be changed. Preferably, its position relative to the second crimping mold changes automatically during operation so that the tool head adapts to the shape of the crimping edge or a force exerted by the first crimping form on the crimping ridge remains constant or changes as desired. The mobility can also be advantageous only in that the first crimping can be moved automatically by means of an adjusting device of the tool head, for example, to move it against the crimping or away from the crimping, the second crimping be in or out of contact with the crimping can. In such embodiments, the hemming device comprises a bearing unit for the first hemming mold movably mounted by the tool head.

The first crimping form is supported by the bearing unit, preferably stationary relative to the bearing unit. The bearing unit is preferably spaced from the tool head transversely to the flanging edge, i. in and against a direction transverse to the working direction of the tool head, movably mounted. This allows movements of the first flanging form relative to the second flanging form in said transverse direction. The tool head supports the bearing unit in the transverse direction expediently linearly movable, preferably against rotation.

The first crimping form may be preferably moved forward in the transverse direction onto the crimping web in such a way that it protrudes beyond the second crimping form, preferably so far, that in the case of a straight, perpendicular to the transverse direction flanging edge can act on the flaring web without the second flared shape. Such an embodiment allows the tool head to contact the crimping web only with the first crimping mold while the second crimping mold is offset from the component. This is in confined areas and for driving over areas with a small radius of curvature, such as corners, advantage. If the first flanging form is the trailing flanging form which completely flips the flanging web, it can be used for reworking, for example, a corner region in order there to improve the quality of the flanged component. With such a flanging the corner can be ironed, so to speak. The trailing flanging form can pass through the corner area several times and in each case act on the crimping web. For cramped space conditions, the first flanging instead of the far extension or preferably this ability can be moved back in the transverse direction of the flared web preferably far enough that it is behind the second flanging, preferably so far that the second flare in the case of a straight, to the Transverse direction perpendicular flaring without the first crimping can act on the flared web. This also improves the maneuverability of the tool head and facilitates the passage through corner areas. The statements made with respect to the first crimping form are also advantageous for the second crimping form, the ratios described above then applying mirror-invertedly with exchanged rolls of the crimping forms or in a further development for both crimping forms.

The invention allows in preferred variants, the execution of two crimping steps in a single run of the tool head along a curved flanged edge.

In the method according to the invention, the tool head is guided in such a way that it and the second flanging form follow the edge course, while by means of the transversal mobility of the bearing unit curvatures which have a flanging edge running in a plane in the plane or a three-dimensional flanging edge in a development to be compensated.

The device according to the invention and the method according to the invention can advantageously be formed as a folding device and can be folded, i. the production of a rabbet joint, serve. However, they are also advantageous for edge bending of a component edge, wherein the bending process does not have to serve the joining of two or possibly more components of the component, but only the edge bending of an example only one-piece component. The crimping bar does not have to be bent around the crimping edge even in a parallel position to an opposite web of the component, i. completely transferred, but the invention is also advantageous for flanging to any bending angle.

The crimping forms can be formed as sliders, which slide along the crimping edge in order to displace the crimping web against the crimping web. In such embodiments, the flanging web contacting active surfaces of the flanged forms are preferably cylindrical. As flanges formed Bördelformen can be realized to save space and therefore be in cramped cramping advantage.

Preferably, at least one of the flanging forms is formed as a flanging roll. Preferably, each of the at least two flanging forms is formed as a flanging roll. If only one of the crimping forms is a crimping roller, then preferably the first crimping form. If the tool head still carries a further flanging form, it is preferred if this further flanging form is formed as a flanging roll.

The first flanging form and the second flanging form advantageously have only a small distance from one another in the working direction of the tool head. If the bearing unit executes compensating movements during curling due to curvatures in the edge profile, their amplitude is correspondingly small. The clear distance measured between the active surfaces of the flanged forms in the working direction should not exceed a few centimeters, preferably the clear distance is at most 10 cm, more preferably at most 5 cm or 4 cm.

In a first variant, the transverse direction into which the first flanging form is movable relative to the second flanging form has an angle, that is, at an angle greater than 0 ° and less than 180 °, to a compressive force with which presses the first crimping form in the folding against the crimping. If a crimping roller forms the first crimping shape, in such an embodiment it does not in particular have any perpendicularity to the axis of rotation of this crimping roller, but has at least one directional component coinciding with the axis of rotation. The bearing unit compensates for curvatures of the flanged edge and acts in this sense as a compensation unit.

In a second variant, the transverse direction is at least substantially parallel to the pressure force or has at least one directional component in common with the pressure force. Preferably, it is aligned with the pressure force. In particular, if the first crimping form is a crimping roller, the transverse direction in such an embodiment is not parallel to the axis of rotation of this crimping roller but has at least one directional component perpendicular to the axis of rotation. In particular, for the second variant, it is preferred if the first flanging is aligned so that it completely flips the flared web, so that the component is bent over at the flanged edge by 180o. In this case, the first crimping form can slide on the folded flanging web to a limited extent in order to compensate for a curved course of the crimping edge in this way.

Because of the movable arrangement, the bearing unit can be acted upon in the direction of action on the crimping ridge, which advantageously coincides with the transverse direction, with a certain, preferably adjustable force. In such embodiments, the device comprises a control device for adjusting the force. The force is preferably kept constant during the run. In a further development, the force is programmatically varied during the work cycle, for example, to compensate for a varying in the direction of strength of the component in the crimping. The mobility can also only or additionally serve to move the first crimping independently of the second crimping against the crimping or away from the crimping. The force can push the bearing unit against a stop. It can be so large that the bearing unit can not lift from the attack under the forces occurring in the application and is therefore relentless. More preferably, however, the force is chosen so that the pressure force acting on the crimping ridge is constant as mentioned during the working cycle. The storage unit acts in such embodiments as a compensation unit for a force balance. Furthermore, it makes it easier for the first crimping form to follow a curved course of the crimping edge and also acts as a compensation unit in this sense.

In order to guide the first flanging shape following the course of the flanging edge, the device in a preferred embodiment has a scanning device which receives the edge course. The scanning device may be a non-contact sensor or include such, for example, an optical sensor or an ultrasonic sensor, the position signal of a control or regulating device is placed, which adjusts the bearing unit accordingly. In an alternative embodiment, the scanning device is or comprises a guide member formed as a contact receiver, which is held in a guide contact with a guide curve corresponding to the edge profile. Although such a guide member could basically only be used via an intermediate control or regulating device with adjusting device for controlling or regulating the transverse movements of the bearing unit, it is further preferred if the guide member is mechanically connected to the bearing unit so that it is the bearing unit in the case of a movement along the guide curve in the transverse direction to the guide curve entrains. Conveniently, the guide member is fixedly arranged on the bearing unit. The guide member may for example be a slider, but is advantageously formed as a role and rolls in the guide contact on the guide curve. The guide member advantageously forms a contact surface for the guide contact in such a way that the contact surface is in the guide contact when viewed with a guide curve formed by the crimping ridge on the other side of the crimping edge or directly with a guide curve formed by the crimping edge or the crimping ridge. The guide member is preferably pressed with a resilience in the guide contact, preferably pneumatically. It is advantageous if the guide member forms a contact surface for the guide contact, which is arranged in the working direction at the same height as the first flanging form.

Instead of receiving the edge profile by means of a scanning device, a control device may be provided, which the first crimping relative to the second in Transverse direction adjusted depending on stored position coordinates of the edge, ie without sampling.

The second flanging is supported in a preferred embodiment of a force measuring device, preferably a load cell, from the tool head. With the force measuring device, the force exerted by the second crimping form on the crimping web force can be measured during the work cycle. The force determined from the measurement is compared with a desired force. Depending on the result of the comparison, for example the difference between the measured actual force and the predetermined desired force, the trajectory of the tool head is optimized. Thus, a movement control of the tool head, ie, a motion control of the tool head bearing actuator, the trajectory be given in the form of an ideal course of the crimping edge, preferably a programmed motion control. Furthermore, the motion control is also predetermined along the movement path of the desired force profile. When the predetermined trajectory is traversed, however, deviations between the predetermined desired force and the actual force determined by measurement can occur. In advantageous developments, the motion control optimizes the trajectory as a function of the comparison of the desired force and the actual force in such a way that the course of the crimping edge comes as close as possible to the ideal trajectory and, at the same time, the actual force corresponds as far as possible to the desired force. The determination of the actual force and, based on this, the optimization of the movement path is an advantage in series production, in particular when starting a new series, in order to optimize the movement path in the first components of a new series. After optimization, the force measuring device can be switched off in the further course of the respective series and the tool head can be stirred on the optimized trajectory. Optionally, in the course of a series at a later time again a check of the actual force with renewed optimization of the trajectory can be performed. Of course, the force measuring device during the entire series, ie when crimping always the same components of a series, be switched on to constantly optimize the trajectory upon detection of deviations of the actual force of the desired force or at least upon detection of a clear trend.

The device according to the invention and the method according to the invention can be used both in a component which is accommodated in a component receptacle, a flanging bed, and in a free component, for example a completed body shell. If the component is not received in a component holder, the tool head preferably carries support rollers, namely one supporting roller per crimping form, which is arranged opposite the associated crimping form, in order to receive the bending force that respectively occurs during the folding.

In one embodiment, a component receptacle, a crimping bed, forms the guide curve. In another embodiment, the component itself forms the guide curve, for example the crimping web or the crimping edge or preferably a component strip extending from the crimping web on the other side of the crimping edge.

In preferred embodiments, the bearing unit is subjected to a pneumatic force in the direction of its transversal mobility, in order to hold the first flanging mold during a working run in a position in which it flips the flanging web around the predetermined bending angle. Instead of pneumatically, the force required for this could be generated by means of a mechanical spring or a system of several mechanical springs. However, the pneumatic generation of the force has the advantage that the size of the force can be specified by appropriate dimensioning of the pressure surface of a piston acted upon by the pneumatic pressure more accurate, a material fatigue less feared and the direction of movement of the storage unit can be easily reversed, if, for example, a Piston-cylinder arrangement is used with a pressurizable piston on both sides. If a pressure generator is used, by means of which the pneumatic pressure is variable, the size of the force can be selected according to different needs during operation, from a Bördelaufgabe to another or different from Bördelvorrichtung crimping the respective needs. A reversibility can be advantageous to apply the first crimping roll before or after the second crimping roll to the crimping web or to take from the crimping web. This can be beneficial in confined spaces. The first crimping form is in such Executions sufficiently far in the transverse direction beyond the second flare beyond or behind these movable. A mechanical spring or a system of several, matched mechanical springs may also be provided a pneumatic force supportive.

Although the bearing unit is preferably subjected to a spring force in the direction of its transverse mobility in order to press the crimping roller resiliently against the crimping web and thereby compensate for unevenness, it is advantageous in alternative embodiments if the transverse force is not a force of elasticity but a stiff force, for example hydraulic or is generated by means of an electric motor.

The tool head is expediently controlled in space in all three coordinate directions and preferably also all three degrees of freedom of the rotation and, if necessary, also controlled so that it can be positioned automatically relative to the component and can be guided following the course of the flanging edge. For this purpose, it is attached or attachable to a correspondingly movable actuator, preferably a robot arm.

As already mentioned, the invention can be used for crimping components for which a component receptacle absorbs the reaction force occurring during crimping. For crimping a component received in a component receptacle, the tool head is acted upon in a direction toward the crimping web by a force in order to apply the forming pressure and thereby the bending force required for transferring the crimping web. The direction of the transverse movement of the first crimping roller has in the first variant at an angle greater than 0o and less than 180 °, preferably at right angles, to the force with which the tool head can be pressed against the crimping web via the crimping forms in order to transfer it. In the second variant, the direction of the transverse mobility preferably at least substantially in the direction of the force, expediently, the directions are identical.

While in a crimping of a component received by a component receiving the component receiving the reaction force, the tool head is used in a Crimping device and a crimping process without component receiving, which also represent a preferred subject of the invention, as a carrier for each at least, preferably exactly one support roller per crimping. Even with such components, such as a component of a side wall for a motor vehicle or an already completed body shell, such as a wheel well, the saving of work runs is of great economic advantage. The tool head is used for such devices and methods as a carrier for each support roller per crimping to accommodate the applied during a folding of the crimping web per crimping bending force. The at least two crimping forms are assigned correspondingly two support rollers. If transverse mobility is provided, one of the support rollers together with the first flanging mold is advantageously rotatably supported by the bearing unit, so that the forming pair formed from the first flanging form and its support roller is movable transversely to the working direction relative to the second flanging form and its associated support roller ,

The bearing unit may be mounted floating in the first variant for the transverse mobility, preferably powerless, between the transversal movement in both directions limiting end stops. In addition, the bearing unit or optionally a further bearing unit can in both variants also be movably mounted in another transverse direction in order, for example, to compensate for curvatures of the flanged edge about axes which are differently oriented in space. The directions of such a double transverse mobility point to each other and also to the working direction of the tool head, preferably at right angles. In principle, however, they can also point at different angles to one another and to the working direction. Instead of storing the first crimping form in two different directions transversely movable, namely on the storage unit, the second crimping can also be stored by a storage unit, which in turn is mounted transversely movable from the tool head in a different direction than the bearing unit with the first crimping.

Advantageous features are also described in the subclaims and in their combinations.

Figur 1

eine erste Rollbördelvorrichtung,

Figur 2

einen Bördelbereich eines zu bördelnden Bauteils in einem Querschnitt,

Figur 3

den Bördelbereich in einer Draufsicht,

Figur 4

die erste Rollbördelvorrichtung während des Rollbördelns in einer Ansicht in Längsrichtung einer Bördelkante des Bauteils,

Figur 5

die erste Rollbördelvorrichtung während des Rollbördelns in einer Ansicht quer zu der Bördelkante,

Figur 6

die erste Rollbördelvorrichtung während des Rollbördelns in einer perspektivischen Sicht,

Figur 7

eine zweite Rollbördelvorrichtung in einer Sicht und

Figur 8

die zweite Rollbördelvorrichtung in einer anderen Sicht.

An embodiment of the invention will be explained below with reference to figures. The features disclosed in the exemplary embodiment form, individually and in every combination of features, the subject-matter of the claims and also the embodiments described above. Show it:

FIG. 1

a first Rollbördelvorrichtung,

FIG. 2

a crimping region of a component to be crimped in a cross section,

FIG. 3

the crimping area in a plan view,

FIG. 4

the first Rollbördelvorrichtung during the Rollbördelns in a view in the longitudinal direction of a flanged edge of the component,

FIG. 5

the first Rollbördelvorrichtung during the Rollbördelns in a view transverse to the flanging edge,

FIG. 6

the first Rollbördelvorrichtung during the Rollbördelns in a perspective view,

FIG. 7

a second Rollbördelvorrichtung in a view and

FIG. 8

the second Rollbördelvorrichtung in a different view.

Figure 1 shows a Rollbördelvorrichtung in a first embodiment. The Rollbördelvorrichtung forms an end effector of a robot. It is a tool head 5, which is provided with a connecting flange for connection to the end of an articulated arm of the robot. The tool head 5 serves as a carrier for a total of two flanging forms, namely a first flanging roller 11 and a second flanging roller 12. The flanging rollers 11 and 12 are used simultaneously during a working run of the tool head 5. The first crimping roller 11 operates as Vorbördelrolle and the second crimping roller 12 as a Nachbördelrolle. The crimping rollers 11 and 12 are hereinafter referred to function as Vorbördelrolle 11 and Nachbördelrolle 12.

FIG. 2 shows an edge region of a preformed sheet 1 of a component. By preforming a beading 2 was generated, which has along a flanged edge 3 at a right angle to an adjacent edge strip of the sheet 1.

Figure 3 shows a plan view of the edge region of the sheet 1 in a settlement. The flanged edge 3 has a curved course in the plane of settlement. The working direction of the Rollbördelvorrichtung, which coincides with the local longitudinal direction of the flanging edge 3 is denoted by L.

The Vorbördelrolle 11 and the Nachbördelrolle 12 are arranged on the tool head 5, and their axes of rotation are aligned so that they completely flipping the flange 2 in a single run of the tool head 5 in two crimping steps, so that the crimping 3 after the roll flanging parallel to the on the other side of the crimping edge 3 adjacent edge strip of the sheet 1 points. In this way, a folding pocket for a clamping connection of the sheet 1 with another sheet, which protrudes with one end into the folding pocket, is formed. Instead of a sheet in the folding pocket, an edge strip of a structure made of another material, such as plastic, are held. If a rabbet joint is produced by the roll crimping, the sheet metal 1 and the structure to be joined thereto are positioned corresponding to one another.

The Nachbördelrolle 12 is fixedly connected to the tool head 5. Location and orientation of its axis of rotation are fixed at least during a run. In the embodiment, the location and the orientation of the axis of rotation are not changeable between work runs. The axis of rotation of Nachbördelrolle 12 has at right angles to a body-fixed axis P of the tool head. 5

The axis of rotation of the Nachbördelrolle 12 has perpendicular to the axis P. The axis of rotation of the Vorbördelrolle 11 is relative to the axis of rotation of the Nachbördelrolle 12 and the axis P respectively inclined. The angle of inclination of the axis of rotation of the Nachbördelrolle 12 by parallel displacement brought to the section axis of rotation of Vorbördelrolle 11 is 45 °. Other angles of inclination are also possible within the known limits. However, with the angular positions of flanging rollers 11 and 12 of the embodiment, a right angle bevelled flanged web is advantageously provided with only two Completely folded over crimping rollers. The inclination angle of the Vorbördelrolle 11 to the axis P is also 45o.

In order to compensate for the curvatures which the component 1 has between the instantaneous location of action of the pre-crimping roller 11 and the point of action of the trailing edge beading roller 12, the position of the pre-crimping roller 11 relative to the tool head 5 and in particular relative to the beading roller 12 is variable. The inclination angle of the Vorbördelrolle 11 is maintained at the position changes. The direction Q of the relative movability of the pre-crimping roller 11 has transversely, in the embodiment at right angles, to the working direction L, i. Further, it has parallel to the edge strip of the component 1, on which the crimping web 2 is folded, which means that the direction Q of the transverse movement parallel to the axis of rotation of the Nachbördelrolle 12 extends. In other crimping tasks, for which the axis of rotation of Nachbördelrolle 12 is not aligned for a complete folding of the crimping ridge 2, the latter would not apply.

The endogenous axis P of the tool head 5, the working direction L and the direction Q of the transversal mobility of the pre-crimping roller 11 are not parallel to each other in pairs, i. they point each other in pairs at an angle. In the exemplary embodiment, they form a rectangular coordinate system, but in principle other angular relationships are not excluded either. In a roll crimping, the tool head 5 is acted upon along the axis P in the direction shown with a force to press the crimping rollers 11 and 12 against the crimping web 2 and thereby successively according to the inclination of the axes of rotation of the crimping rollers 11 and 12 reposition.

For the transversely movable Vorbördelrolle 11 includes the tool head 5 acting as a compensation unit bearing unit 9, which is movably supported by the tool head 5 in the transverse direction Q and in turn rotatably supports the Vorbördelrolle 11. The bearing unit 9 forms a rotationally secured in the direction Q relative to the tool head 5 linearly movable carriage. Since the bearing unit 9 is carried by the tool head 5 and thus is a part of the tool head 5, the bearing unit 9 is more precisely not by the tool head 5 as such, but by a bearing part of the Tool head 5 stored. This bearing part comprises a cylinder unit 6 of a pressing device and a guide 8 for guiding the bearing unit 9 in the transverse direction Q. The bearing unit 9 comprises a piston unit 9a which forms the pressing device in cooperation with the cylinder unit 6, a bearing structure 9c and 9b rotatably supporting the pre-crimping roller 11 a connecting structure 9b rigidly connecting the piston unit 9a with the bearing structure 9c and shaped as a bracket.

The pressing device is a pneumatic power generator and is formed from the cylinder unit 6 and the piston unit 9a as a cylinder-piston unit. The piston unit 9a consists of a piston and a piston rod. The cylinder unit 6 forms a cylinder for the piston. The piston rod is connected to the connection structure 9b. The pressing device further comprises a connection 7 for a compressed gas, preferably compressed air.

FIGS. 4 to 6 show an arrangement for roll-flanging the sheet 1 consisting of the roll-flanging device and a component receptacle 4. Figure 4 shows a view against the working direction L of the Rollbördelvorrichtung, Figure 5 shows the arrangement in a view on a side facing away from the sheet metal 1 back of the Rollbördelvorrichtung and Figure 6 is a perspective view.

The metal sheet 1 rests on the component receptacle 4, a crimping bed, and is either already fixed by resting or additionally on the component receptacle 4. The component holder 4 forms a guide curve 4a for the bearing unit 9. The guide curve 4a follows the flanged edge 3 along its side opposite the flaring web 2 and has at least substantially in the direction Q of the transverse movement of the bearing unit 9; in the exemplary embodiment, it extends exactly perpendicular to the direction Q.

On the bearing unit 9, a guide member 10 is arranged, which is in the rolling flanging with the guide curve 4a in a guide contact. The guide member 10 is formed as a roll and is from the storage unit 9 about a direction perpendicular to the direction Q, to the axis P parallel axis of rotation rotatably mounted. In the roll flanging, the guide member 10 thus rolls in the guide contact on the guide curve 4a.

The bearing unit 9 is pressed by means of the pressing device 6, 9a in the direction Q on the bead web 2. At the same time presses the pressing device 6, 9a while the guide member 10 against the guide curve 4a. The position of the guide member 10 is selected in the direction Q relative to the Vorbördelrolle 11 so that the Vorbördelrolle 11 the Bördelsteg 2 by the angle predetermined by the inclination of Vorbördelrolle 11 angles when the guide member 10 is in guiding contact with the guide curve 4a. The guide member 10 is rotatable only about its axis of rotation, but otherwise arranged relative to the storage unit 9 stationary. By the guide member 10 is pressed into the guide contact, it follows the course of the flanging edge 3 during the movement of the hemming in the working direction L. While the tool head 5 along the axis P presses on the hemming 2 and controlled or optionally also guided regulated so that the Nachbördelrolle 12 follows the course of the flanging edge 3, the Vorbördelrolle 11 can move in the context of their Querbewegbarkeit relative to the Nachbördelrolle 12 to compensate in this way between the crimping rollers 11 and 12 occurring curvatures. It has a favorable effect that the Vorbördelrolle 11 is pressed by an elastic restoring force generated by the pneumatic pressure device 6, 9a, against the crimping web 2 and so in the case of unevenness of the crimping 2 in the transverse direction Q elastically yielding, i. compressed.

For the generation of the contact pressure, the pressing device 6, 9a can be acted upon via the connection 7 with a certain pressure and be closed after the pressure has been built up, so that the cylinder unit 6 forms a closed chamber. In a preferred alternative embodiment, the pressure in the cylinder 6 is regulated during operation to maintain a predetermined setpoint.

The pressing device 6, 9a forms in combination with the guide member 10 an adjusting device for the bearing unit 9 and thus for the Vorbördelrolle 11. However, it is not only the pressing of the guide member 10 to the guide curve 4a and consequently the Vorbördelrolle 11 against the crimping ridge 2. In simple designs For example, the pressing device 6, 9a can press the guide member 10 only against the guide curve 4a. In a further development, the pressing device 6, 9a already alone forms an adjusting device by means of which the Vorbördelrolle 11 relative to the Nachbördelrolle 12 at the beginning of the work in the direction Q in the working position and at the end of the work in the opposite direction, which is also referred to as Q. , is movable from the working position.

To start the work cycle, the tool head 5 is moved to an initial position, either controlled by a sensor or only controlled with appropriate storage of the position of the sheet 1. In the initial position of the tool head 5, only the pre-crimping roller 11 is pressed against the crimping web 2. The workflow is now started. In a single operation of the crimping 2 is folded according to the inclination of Vorbördelrolle 11 in a first crimping step and according to the inclination of the Nachbördelrolle 12, in the embodiment, it is completely folded so that it is parallel to the adjacent to the other side of the crimping edge 3 edge strip of the sheet 1 comes to rest. The flanging device is thus particularly suitable for forming a folded connection of the sheet 1 with a further structure which is planar at least in the joining region. With a corresponding orientation of the axes of rotation of the crimping rollers 11 and 12, the crimping web 2 or a crimping web preformed at a different bending angle can be transferred per crimping step and also altogether at a different bending angle. At the end of the run, the Vorbördelrolle 11 either simply continues in the direction L, or it drives the pressing device 6, 9a, the bearing unit 9 and thus the Vorbördelrolle 11 in the transverse direction Q from the crimping, so that the Nachbördelrolle 12 in the cramped space in the longitudinal direction L. the flanged edge 3 further moves and the flanged edge 3 can be folded in its end according to the Bördelaufgabe. Finally, the tool head 5 is moved entirely out of the flanging area.

During the run, the tool head 5 is either controlled or guided only controlled. In the case of a position control, the tool head is equipped with a corresponding sensor system for detecting the edge profile or a suitable other reference. In the case of only controlled movement, one has the movement of the Tool head 5 controlling control access to a stored data set, which represents the course of the flanged edge 3.

For the adjusting movement in the direction Q to the flanging edge 3 and the generation of the contact pressure on the one hand and the adjusting movement in the opposite direction Q of the flanging edge 3 away on the other hand form the piston unit 9a in the development of a on both sides of the piston pressurized piston, i. a double piston, and the cylinder unit 6 on both sides of a piston each with a pressurizable cylinder space.

Figures 7 and 8 show a Rollbördelvorrichtung in a second embodiment in two perspective views. Components with the same function as components of the first embodiment are provided with the reference numerals of the first embodiment. New reference numerals are used only for the crimping rollers 13 and 14. Hereinafter, the differences from the first embodiment will be described. Incidentally, the comments on the first embodiment apply.

In the second embodiment, the trailing roller, the Nachbördelrolle 14, transversely to the longitudinal direction of the flanging edge 3, the working direction L, movable and is therefore the first crimping roller in the context of the invention. It is mounted parallel to the force axis P in and against the direction of the force with which the tool head 5 is pressed against the component 1, movable. In the L, P, Q coordinate system of the tool head 5, the angular position with respect to all coordinate axes and the location of the Nachbördelrolle 14 with respect to the axes L and Q are mechanically fixed, as in the first embodiment of the Nachbördelrolle 12 is the case.

The Vorbördelrolle 13 is supported via a load cell 16, but otherwise both fixedly arranged on the tool head 5 and fixed with respect to their angular position. With regard to the angular position and the fixation of the location with respect to the axis L, it corresponds to the Vorbördelrolle 11 of the first embodiment. The load cell 16 is used to measure the force with which the Vorbördelrolle 13 against the crimping the second and based on this setting the optimum force for the Vorbördelschritt. The load cell 16 may comprise a tethered spring and the Vorbördelrolle 13 via the load cell 16 as described in DE 100 11 854 A1 be stored on the tool head 5. DE 100 11 854 A1 is referred to for this purpose. For practical purposes, a fixed arrangement can be assumed for the Vorbördelrolle 13, especially since the load cell 16 can be omitted in a simplified embodiment and the Vorbördelrolle 13 is then fixed to the tool head 5. By means of the load cell 16 advantageously the movement path of the tool head is optimized.

The cylinder unit 6 is pivoted by 90 ° according to the changed direction of the transverse mobility attached to the tool head 5. The piston unit 9a therefore travels in the transverse direction P in and out and with it the further parts 9b and 9c of the bearing unit 9 fastened thereto. The bearing unit 9 is guided in the region of its connecting structure 9b by the guide 8 in the transverse direction P in a linearly secured manner. The bearing structure 9c, which supports the Nachbördelrolle 14 rotatably, is rigidly connected via the connecting structure 9b with the piston unit 9a. The storage unit 9 is stiff again. The cylinder unit 6 has two ports 7 for a pressurized gas, preferably compressed air, to pressurize the piston of the piston unit 9a on both sides and to be able to move the bearing unit 9 back and forth in the transverse direction P.

The bearing unit 9 can be extended in the direction of action P far enough that the Nachbördelrolle 14 projects beyond the Vorbördelrolle 13 so that they can act in the case of a straight, perpendicular to the axis P flanged edge 3 without the Vorbördelrolle 13 on the flared web 2. Furthermore, it can be retracted counter to the direction of action P far enough that the Nachbördelrolle 14 behind the Vorbördelrolle 13 protrudes so far that the Vorbördelrolle 13 in the case of a straight, perpendicular to the axis P flanged edge 3 can act on the flaring web 2 without the Nachbördelrolle 14.

The pressure with which the Nachbördelrolle 14 acts on the flaring web 2 is kept constant during a run. The storage unit 9 is for this purpose with a acted upon corresponding selected force, in the embodiment with a gas pressure in the cylinder unit 6, which holds a pressure control device constant. By keeping the effective pressure of the Nachbördelrolle 14 constant unevenness, which may have the component 1 in the crimping, compensated.

After the preparation of the tool head 5, the crimping web 2 is completely folded over in two crimping steps, which the tool head 5 executes in the same work cycle. The Nachbördelrolle 14 acting with constant pressure on the flanged web 2 ensures a high quality of form in the beaded edge region of the component 1. If the flanged edge 3 has a corner region, such as in sliding roofs or vehicle doors, the pre-flanging roller 13 passes through the corner region. The bearing unit 9 is retracted so far for this passage through the corner that the Nachbördelrolle 14 does not act on the crimping 2 in the corner. After the pre-crimping roller 13 has folded over the corner area, the tool head 5 is moved a little way away from the crimping web 2 in the next step, so that the pre-crimping roller 13 lifts away from the crimping web 2. Synchronously with the lifting of Vorbördelrolle 13, the bearing unit 9 is extended, so that the Nachbördelrolle 14 moves back to its working position. The tool head 5 is now moved back in front of the corner area in reversal of the working direction L, so that the crimping web 2 is completely folded in the corner region with lifted Vorbördelrolle 13 by means of the Nachbördelrolle 14. Subsequently, the tool head 5 passes through the corner area with lifted Vorbördelrolle 13 and befindlicher in working position Nachbördelrolle 14 again to "iron" the component 1 in the corner and thereby improve the quality of the component. Immediately after the Nachbördelrolle 14 has passed through the corner in the original working direction L, the tool head 5 in the direction of P on the flared web 2 is advanced and synchronously the storage unit 9 retracted until both crimping rollers 13 and 14 at the same time press on the crimping 2 and this in successively transfer the further course of the work process.

In yet another embodiment, which is not shown, however, a flanging device according to the invention comprises the pre-flanging roll 11 of the first embodiment and the flanging roll 14 of the second embodiment.

LIST OF REFERENCE NUMBERS

1

Component, sheet metal

2

flanging

3

flanging

4

component pick

4a

guide curve

5

tool head

6

cylinder unit

7

Compressed gas connection

8th

guide

9

storage unit

9a

piston unit

9b

hanger

9c

bearing structure

10

guide member

11

first crimping, Vorbördelrolle

12

second crimping, Nachbördelrolle

13

second crimping, Vorbördelrolle

14

first crimping, Nachbördelrolle

15

leg

16

Load cell

17

leg

L

working direction

P

Transverse direction, force axis

Q

transversely

Claims (23)

Crimping device for transferring a crimping web (2) of a component (1) about a crimping edge (3), the crimping device comprising: a) a tool head (5), b) a first flanging form (11; 14) and a second flanging form (12; 13) which the tool head (5) simultaneously holds in the working position and one of which is arranged to follow one of the others in a working direction (L). Beading device according to claim 1, comprising a bearing unit (9) which supports the first flanging form (11; 14) and is movably supported by the tool head (5) in the transverse direction (P; Q) to the working direction (L). Beading device according to the preceding claim, comprising a guide (8) which guides the bearing unit (9) on the tool head (5) in the transverse direction (P; Q). Beading device according to one of the two preceding claims, characterized in that the tool head (5) carries an adjusting device (6, 9a; 6, 9a, 10) and the bearing unit (9) by means of the adjusting device (6, 9a; 6, 9a, 10 ) can be acted upon with a preferably constant or adjustable force acting in the transverse direction (P; Q). Beading device according to one of the preceding claims, characterized in that the trailing edge forming bead (12; 14) is a Fertigbördelrolle for a complete folding of the crimping ridge (2). Crimping device according to one of the preceding claims, characterized in that the crimping forms (11, 12; 13, 14) are fixed or fixable relative to each other on the tool head (5) with respect to several degrees of freedom, preferably not relative to one another at least during the crimping changeable inclination. Device according to one of the preceding claims, characterized in that the second flanging form (11; 13) is supported on the tool head (5) via a force measuring device (16). Beading device according to one of the preceding claims, comprising a bearing unit (9), which supports the first flanging form (11; 14) and is movably supported by the tool head (5) in the transverse direction (P; Q) to the working direction (L), so that the first flanging form (11; 14) for compensating for a curvature of the flanging edge (3) is movable transversely to the flanging edge (3) following the course of the flanging edge (3) relative to the second flanging form (12; Flanging device according to one of the preceding claims, characterized in that the first flanging form (14) of the second flanged form (13) is arranged trailing. Flanging device according to one of claims 1 to 8, characterized in that the second flanging form (12) of the first flanged form (11) is arranged trailing. Flanging device according to one of the preceding claims in combination with claim 2, characterized in that the tool head (5) carries an adjusting device (6, 9a; 6, 9a, 10), by means of which the bearing unit (9) transversely to the flanging edge (3) can be acted upon with a force which causes a transverse movement of the bearing unit (9) relative to the second flanging (12; 13). Beading device according to one of the preceding claims in combination with claim 2, characterized in that on the bearing unit (9) a guide member (10) is arranged for a guide contact with a guide cam (4a), wherein the bearing unit (9) in the guide contact of the guide member (10) following the course of the crimping edge (3) in the transverse direction (Q) is moved, and that the bearing unit (9), the first crimping mold (11) together with the guide member (10) stores transversely movable. Beading device according to one of the preceding claims in combination with claim 2, characterized in that the tool head (5) supports the bearing unit (9) against a restoring force, preferably elastic force, transversely movable. Beading device according to one of the preceding claims in combination with claim 2, characterized in that the bearing unit (9) on the tool head (5) is pneumatically supported. Flanging device according to one of the preceding claims in combination with claim 2, characterized in that the tool head (5) supports the bearing unit (9) movable parallel or angularly to a pressure which the first flanging form (11) transfers to the flanging web (2 ) exercises. Crimping device according to one of the preceding claims, characterized in that at least one of the crimping forms (11, 12; 13, 14) is a crimping roller. Beading device according to the preceding claim in combination with claim 2, characterized in that the transverse direction (P; Q) has at least one common directional component with the axis of rotation of the at least one flanging formed as a flanging roll (11; 14) or an axis pointing at right angles to the axis of rotation , Beading device according to one of the preceding claims, characterized by the use for folding, preferably roller hemming, on a vehicle part (1), for example on a vehicle door. Method for transferring a crimping web (2) of a component (1) about a crimping edge (3), in which a) a tool head (5) carrying a leading flanging form (11; 13) and a trailing flanging form (12; 14) is moved along the flanging edge (3) in one operation, the tool head (5) preferably being one of the flanging forms (11, 12; 13, 14) movable relative to the other transversely to the flanging edge (3), b) wherein the leading flanging form (11; 13) surrounds the crimping web (2) c) and the trailing flanging form (12, 14) in the same operation, the crimping ridge (2) further deflected at the leading edge flanging (11, 13) acting on the crimping web (2). Method according to the preceding claim, characterized in that at least one of the crimping forms (11, 12; 13, 14) deflects relative to the other in a direction (P; Q) transverse to the crimping edge (3) and further is angular or at least substantially parallel to a pressure exerted by the resilient flange (11; 14) on the crimping web (2) when it is folded over. Method according to one of the preceding claims, characterized in that the component (1) is received by a component receptacle (4) which receives a pressure exerted by the crimping forms (11, 12; 13, 14). Method according to one of the preceding claims, characterized in that at least one of the crimping forms (11, 12; 13, 14) acts on the crimping web (2) with constant pressure. Method according to one of the preceding claims, characterized in that a corner region of the flanged edge (3) is reversed several times by reversing the working direction (L) and in a first pass the trailing flanging form (12; 14) of the flanged web (2) and in a subsequent leading through the leading edge flanging (11, 13) is lifted from the crimping ridge (2), while the other crimping form surrounds the crimping ridge (2) in each pass.

Images