Abstract:
A hemming machine having a nest adapted to support a part to be hemmed. A hold down is movable between a retracted position in which the hold down is spaced from the part and an extended position in which the part is sandwiched between the hold down and the nest and a guide surface is formed around the periphery of the hold down. A hemming head having a roller hemmer assembly and mounted to and manipulated by a robotic arm. The roller assembly includes a first roller which engages the guide surface during a roller prehemming operation of the part performed by the robotic arm and a second roller which prehems the part.
Abstract:
ABREGE Procédé de fixation de deux pièces planes l'une sur l'autre dans un poste comprenant au moins un robot d'assemblage (2 ; 14), au moins un support (1 ; 10, 11, 12, 13) pour les pièces et au moins un robot chargeur (3, 15) de pièces sur le support, caractérisé en ce qu'il comprend les étapes de : - commander le robot chargeur pour qu'il dispose les pièces l'une au-dessus de l'autre sur le support et qu'il maintienne les pièces contre le support, - commander le robot d'assemblage pour qu'il fixe les pièces ainsi maintenues.
Abstract:
Ein Verfahren zum Herstellen eines zunächst umgeformten und anschliessend unter Wärmeeinwirkung oberflächenbehandelten Bauteils einer Karosserie eines Kraftfahrzeugs sieht iterative Simulationsschritte mit veränderlichen Werkzeuggeometriedaten von für das Umformen zu verwendenden Werkzeugen vor. Dabei wird stets überprüft, ob die zu erwartenden Geometriedaten des Bauteils im zulässigen Toleranzbereich der nominellen Geometriedaten des Bauteils liegen. Falls dies nicht der Fall ist, werden die Werkzeuggeometriedaten und Erzeugen von korrigierten Werkzeuggeometriedaten verändert. Dies erfolgt in zwei Stufen, nämlich zunächst für die Umformungsschritte und anschliessend für die Prozessschritte des Oberflächenbehandelns unter Wärmeeinwirkung.
Abstract:
An apparatus and method for forming and joining a first sheet material (A) located in a nest (30) to a second sheet material (B) positioned on top of the first sheet material. The apparatus includes a positional pressure roller tool or positional pressure variance unit (50) for performing the forming and joining operations. The PPVU (50) may include both a main roller (58) and a touch-up roller (60). The PPVU (50) is operatively associated with a programmable positioning apparatus in the form of a robotic arm (52) and a machine cell (10) whereby the position of the robotic arm (52) relative to the nest (30) dictates the applied pressure at the interface between the roller (72) and the nest (30).
Abstract:
Die Erfindung betrifft eine Bördelvorrichtung (1) zum Umlegen einer Bördelkante (2) eines Werkstücks (3, 4) durch Rollfalzen mit wenigstens zwei Falzschritten. Ein Gelenkarmroboter weist einen Roboterarm auf, mit dem eine Werkzeugeinheit (9) verbunden ist. An der gesteuert bewegbaren Werkzeugeinheit (9) ist eine Falzrolle (10) als Druckrolle drehbar gelagert, die unter Druckaufbringung und mit bestimmter Winkelstellung entlang und in Anlage an der Bördelkante (2) zu deren Umlegung rollbar ist. Ferner ist ein der Falzrolle (10) zugeordnetes und bezüglich der Bördelkante (2) gegenüberliegend angeordnetes Stützelement (11) vorgesehen. Erfindungsgemäss ist das Stützelement (11) eine an der Werkzeugeinheit (9) im Bereich der Falzrolle (10) drehbar gelagerte Stützrolle, die am Umfang eine umlaufende Stützrollenkante (16) aufweist, welche zumindest im ersten Falzschritt entlang der Abkantlinie (22) der Bördelkante (2) zu deren lagegenauer Ausbildung abstützend abrollbar ist.
Abstract:
The present invention relates to an improved resistance weld-based gun assembly for use in an electric welding system without a need for plant-provided air and water-cooling circulation systems. In one aspect of the invention, a resistance-based force controller measures the resistance of a secondary circuit of the weld gun, the combined resistance of the secondary circuit in parallel with the circuit formed by the workpieces and opposing electrodes when sandwiched between the electrodes, and calculates the resistance of the workpieces. The measured resistance is compared to a predetermined resistance and the sandwiching force of the electrodes incrementally adjusted until the resistance of the workpieces is acceptable. The invention also relates to a closed loop coolant system having a coolant line, a coolant contained within the coolant line, a heat exchanger, and a mechanical coolant pump. One possible pump comprises an elastic bladder dependent upon the state change of the coolant. A second possible pump comprises a reciprocating extractor mechanically connected to the weld gun actuator. In yet another aspect of the invention, the welding system relies solely on electrode arm material for heat dissipation, the heat being conducted through the electrode arm material to an outer surface of the arm where the heat is dissipated through natural convection. To promote natural convection, a plurality of ribs with channels defined therebetween or openings extending through the arm itself increase the surface area and the rate of convection.
Abstract:
The invention relates to a method for connecting components, in particular, aluminium sheets of motor vehicle bodies by pre-folding and folding said sheets at their edges. According to said method, the components which lie on a folding bed (1) are retained in the end position of the pre-folding process by a pivoting movement or by a linear displacement motion of the folding jaws (10) and the folding bed (1), containing the pre-folded components to be folded, is subsequently pressed against the folding jaws (10) by a lifting movement. The invention also relates to a folding device for carrying out said method.
Abstract:
The invention relates to a flanging device for pre-flanging and flanging of components (5, 6), in particular vehicle body sheet metal, comprising a) a first component (5) with a vertical flange (7) positioned in front of the flange, b) a second component (6) with an even edge region (8), c) a fold bed creating a flange (4) with a support surface for said components (5, 6), located at least in the vicinity of an edge region (8) d) at least one pre-fold cheek (9, 21) which can be moved to a preflanging position and having a working surface located in an edge area (14) for said flange (7), e) at least one pusher (2) which can move a flange from the outside to the inside of said flange position (10) a surface (15) located at an edge region (8) for said flange (7).
Abstract:
A hemming structure of a metallic sheet in which an edge portion (7) of an outer panel (6) is so folded back as to wrap an edge portion (2) of an inner panel (1), wherein the edge portion (2) has an inner projection (3) with an upper face (3') the slope of which descends toward an edge (4), the edge portion (7) has an outer projection (8) in which the inner projection (3) is nested, and the upper face (3') is in contact with the back face (8') of the outer projection (8).
Abstract:
In a process in roller folding a folding roller (4) is moved against a workpiece (12). The urging force of the folding roller (4) against the workpiece (12) is resilient, and the folding roller (4) moves in a path along the workpiece (12) by means of a movement device provided with a control system. The urging force is sensed by a sensor, which is integral in or included in the movement device, and the output signal of the sensor is fed to the control system.