Abstract:
A machining tool comprises a frame mounting an extendable yoke slidable with respect to the frame in a first direction through two mounting pillars. A tool motor is mounted on the yoke. A drive mechanism for the yoke is also mounted in the frame, with a drive motor to drive the yoke drive mechanism. A belt is between pulleys on the drive motor and mechanism to transmit drive between them. A rotatable sleeve is around the tool motor and on which sleeve the belt engages on opposite sides of the tool motor, whereby the tool motor can extend between the drive motor and mechanism, thereby resulting in a compact arrangement of the tool. A chassis plate is connected to the frame beyond the yoke and through which the tool bit protrudes. A foot plate has attachment means for attaching the tool to a workpiece. Locking means lock the chassis and foot plates together in selectable position of one with respect to the other, whereby the tool can be fixed with respect to the workpiece for reaction against the workpiece during machining of the workpiece by the tool. A mounting structure comprises an annular plate having an aperture and a foot plate fixed and a base plate received between them to define an annular chamber in which a rheological fluid is disposed. The base plate is connectible to a first device, eg the frame of the machining tool, through the aperture of the annular plate. The foot plate is connectible to a second device eg a workpiece. Activation of the rheological fluid to render it solid serves to lock the devices with respect to one another. Deactivation serves to permit the position of the devices to be adjusted by sliding the base plate between the annular and foot plates.
Abstract:
A machining tool comprises a frame mounting an extendable yoke slidable with respect to the frame in a first direction through two mounting pillars. A tool motor is mounted on the yoke. A drive mechanism for the yoke is also mounted in the frame, with a drive motor to drive the yoke drive mechanism. A belt is between pulleys on the drive motor and mechanism to transmit drive between them. A rotatable sleeve is around the tool motor and on which sleeve the belt engages on opposite sides of the tool motor, whereby the tool motor can extend between the drive motor and mechanism, thereby resulting in a compact arrangement of the tool. A chassis plate is connected to the frame beyond the yoke and through which the tool bit protrudes. A foot plate has attachment means for attaching the tool to a workpiece. Locking means lock the chassis and foot plates together in selectable position of one with respect to the other, whereby the tool can be fixed with respect to the workpiece for reaction against the workpiece during machining of the workpiece by the tool. A mounting structure comprises an annular plate having an aperture and a foot plate fixed and a base plate received between them to define an annular chamber in which a rheological fluid is disposed. The base plate is connectible to a first device, eg the frame of the machining tool, through the aperture of the annular plate. The foot plate is connectible to a second device eg a workpiece. Activation of the rheological fluid to render it solid serves to lock the devices with respect to one another. Deactivation serves to permit the position of the devices to be adjusted by sliding the base plate between the annular and foot plates.
Abstract:
This invention relates to a friction welding apparatus (10), and more particularly, but not exclusively, to a modular friction welding apparatus suitable for in-situ reparation of blind holes in pipes (12). The friction welding apparatus (10) includes a frame assembly (20), a spindle assembly (40) for holding a friction welding consumable; and a drive assembly (30) for driving a spindle of the spindle assembly. The spindle assembly (40) and the drive assembly (30) are releasably securable to the frame assembly (20) so as to form a modular friction welding apparatus, and the frame assembly (20) is furthermore removably securable to an object to be welded.
Abstract:
An embodiment of a method for interconnecting tubular sections includes the steps of vertically positioning a second tubular above a first tubular forming a seam defined by a bottom end of the second tubular and a top end of the first tubular; positioning a friction stir welder (FSW) proximate to the seam; aligning the first tubular and the second tubular to form a longitudinal axis; and guiding the FSW along the seam forming a weld joint.
Abstract:
Die Erfindung betrifft ein Rührreibschweißwerkzeug sowie ein Verfahren und eine Anordnung zur Echtzeit-Kontrolle eines Rührreibschweißprozesses. Mit der vorliegenden Erfindung soll ein kompaktes, universell einsetzbares Rührreibschweißwerkzeug sowie ein Verfahren und eine Anordnung zur Echtzeit-Kontrolle eines Rührreibschweißprozesses bereitgestellt werden, so dass in seinem Ergebnis eine qualitätsgerechte Fügenaht ohne notwendige Nachbearbeitung entsteht, wobei die Belastungen der Rührreibschweißanlage minimiert werden. Erfindungsgemäß wird diese Aufgabe dadurch gelöst, dass die Schwingungen eines Rührreibschweißwerkzeuges in x-, y- und z- Richtung, die vom Rührreibschweißwerkzeug aus wirkenden Bearbeitungskräfte und die Arbeitstemperaturen, die unmittelbar an der Schweißstelle auftreten, während des Rührreibschweißprozesses mit geeigneten im Werkzeuggrundkörper (1) Sensoren (7) erfasst werden, die erfassten Daten telemetrisch durch Einheit (8) an eine Auswerteeinheit übertragen und von dieser rechnergestützt aufbereitet werden und über eine Steuereinheit die Prozessparameter Bearbeitungsgeschwindigkeit, Bearbeitungskraft und Arbeitstemperatur geregelt werden.
Abstract:
There are provided an apparatus and method for friction welding structural members (60, 62). The apparatus -includes a connected shank (20) and probe (22). The probe (22) and the shank (20) defines an absorption surface (32) and a cavity (26) extending thereto. The absorption surface (32) is configured to receive electromagnetic radiation (52) from an electromagnetic radiation source (50) such as a light source or RF generator. The radiation (52) heats the probe (22), supplementing the heat generated by friction between the probe (22) and the structural members (60, 62), and thereby increasing the speed at which the probe (22) can be used to frictionally weld the structural materials (60, 62).
Abstract:
Welding head 1 for friction stir welding, adapted for connection and driving of a tool 2 intended for simultaneous friction stir welding from two opposite surfaces on an object for welding, comprising a tool holder 9, a force-generating device 3, 13 and a rotary driving device 5 which, during operation, can impart to the connected tool 2 a cyclic movement around the centre axis 10 of the tool and relative to the object for welding arranged in conjunction with the welding head. The force-generating device is controllable during operation and adapted so as, during operation, to act between a primary shoulder 6 and a secondary shoulder 7 on a tool 2 connected in the tool holder 9. The invention also comprises a welding system for friction stir welding, with the force between the shoulders of the tool being controlled depending on the current torque for rotary driving. Also indicated are a method for initiating friction stir welding and computer program for such a method.
Abstract:
A friction stir welding apparatus includes a C-shaped frame (12) having two opposing jaws (14, 16) which are spaced apart to define a space (18) for receiving workpieces which are to be welded together. One of the jaws supports a rotatably driven friction stir welding spindle (36), and the other jaw supports a back-up tool (28). The spindle is supported in a polycrystalline thrust bearing (34) disposed in the one jaw for absorbing thrust forces exerted on the spindle during a welding operation. The C-shaped frame may be an integral one-piece structure, in which case the apparatus and workpieces are relatively advanced to cause the spindle to penetrate the workpieces at an edge thereof and to carry the welding tools along a weld path to a second edge of the workpieces, where the spindle exits and disengages the workpieces. Alternatively, the C-shaped frame may comprise a pair of separate jaws which are pivotally connected in scissor fashion, in which case the jaws may be pivotally urged toward one another to carry the welding tools into engagement with the workpieces for performing a welding operation. The C-shaped frame balances and absorbs the large thrust loads imposed on friction stir welding tools.
Abstract:
Vorrichtung und Verfahren zum nahezu verzögerungsfreien Ändern der Schweißrichtung der Schweißschulter einer Anlage zum Rührreibschweißen wenn die geometrische Anordnung der zu verschweißenden Fügepartner oder Materialunebenheiten dies erfordern, mit den folgenden Verfahrensmerkmalen: a) ein Grundkörper (1) mit einem horizontal verfahrbaren Brückenträger (5) weist einen, mit diesem, vertikal verstellbaren Reibschweißkopf (12) auf, der eine Pin-Aufnahme (13) zur Halterung und den Antrieb einer Schweißpin-Spitze (14) trägt, wobei der Schweißschulter (18) eine mehrfach gelagerte Schweißschulter-Aufnahme (17) aufweist, b) die Schweißschulter-Aufnahme (17) lässt sich mittels verschiedener Zug- und Druckstangen (16) während des Schweißvorgangs in beliebigem Anstellwinkel zu den Fügepartnern verstellen.