Abstract:
An apparatus for manufacturing wire wrapped screens utilizing a wire and support ribs is provided. The apparatus employs welding pressure control, utilizing a welding device mounted on a support assembly, wherein the support assembly is moveable in relation to a mounting stracture and the wire and support rib weld pieces. Welding pressure is determined by a force measurement device, and a control and feedback system adjusts pressure. Mechanical actuator cylinders mounted on the support assembly and the mounting structure provide load balance. A method for making wire wrapped screens is also provided.
Abstract:
Seam welding apparatus (50) with a bearing support arrangement for a transversely movable upper welding wheel (51). The upper wheel is non-rotatably secured adjacent one end of an elongate electrically conductive shaft (66), the other shaft end being rotatably supported within an electrically conductive bearing assembly (67) which transmits electricity thereto from an external source (63). A non-rotatable bearing housing (68) is pivotally supported relative to a machine frame (61) by a pivot (74) which extends adjacent the housing perpendicularly to the shaft, the pivot being disposed remote from the wheel. A pressure cylinder (81) and ram (82) are mounted on the frame, the ram being movably supported and acting downwardly onto a spring unit (83) and electrical insulator (84). The spring and insulator are rotatably supportingly engaged with the shaft adjacent the wheel. The housing and shaft are mounted on a movable slide (73) to which the ram is preferably coupled. The spring unit is coupled between the slide and shaft.
Abstract:
A seam welding apparatus (50) having an improved bearing support arrangement for the transversely movable upper weld wheel (51). This upper weld wheel is nonrotatably secured adjacent one end of an elongate electrically conductive shaft (66), which shaft adjacent its other end is supported within a conventional electrically conductive bearing assembly (67) which rotatably supports the shaft and transmits electrical energy thereto from an external source such as a transformer (63). The nonrotatable housing (67) associated with the bearing assembly is pivotally supported on the machine frame by a pivot (74) which extends adjacent the housing in perpendicular relation to the shaft axis (53), with this pivot axis being disposed remote (D) from the weld wheel. A welding force generating assembly such as a pressure cylinder (81) and ram (82) are mounted on the machine frame, with the ram being movably supported and acting downwardly onto a spring unit (83) which has an electrical insulator (84) associated therewith. This spring unit (83) and its electrical insulator (84) in turn are rotatably supportingly engaged with the shaft (66) closely axially adjacent the weld wheel (51).
Abstract:
A novel method and apparatus is disclosed for the production of single plane ladder-type rack strip material in which wire cross bar elements are Tee-welded to the inside surface portions of opposed, parallel side elements formed of similar wire material. The welding procedure involves contacting the cross bar element centrally with an electrode of a first polarity and contacting the wire side elements on opposite sides with electrodes of a second polarity. During the welding operation, current flows substantially equally from the first electrode in opposite directions through the opposite weld interfaces to the opposed second electrodes. By observing physical symmetry in the electrical supply at opposite sides, equalization of current flow is optimized so that the emerging rack strip product is flat and straight, suitable for commercial marketing. By forming the rack strip elements in a single plane, the elements can be formed into a wide variety of modular components for the assembly of a variety of useful rack and shelving structures. Novel forms of mounting and connecting blocks are also disclosed.
Abstract:
Eine Rollennahtelektrode zur Verwendung beim Rollennahtschweißen umfasst eine segmentförmige Elektrodenfläche (2) zur Anpressung der zu verbindenden Bauteile und zur Einleitung des Schweißstroms und der Schweißspannung. Die Elektrodenfläche (2) ist derart dreieckförm ig oder mäanderförmig oder zueinander beabstandet ausgebildet, dass in der ebenen Abwicklung der Elektrodenfläche (2) ein Zickzack-Muster oder ein Wellen-Muster oder ein Steppnaht-Muster oder ein Rechteck-Muster vorliegt, wobei die Elektrodenfläche (2) durch mehrere Elektrodenplatten (6) gebildet ist, die entnehmbar angeordnet sind.
Abstract:
The present invention relates to a mobile seam welder and to a method for controlling the welding operation thereof. A mobile resistance seam welder of the present invention comprises an upper control unit (110) and a lower control unit (120) for synchronizing the movement speed of a mobile unit and the rotating speed of an upper disk electrode (101) and of a lower disk electrode (101'). The upper control unit (110) and the lower control unit (120) comprise: respective first measuring units (111, 121) for measuring the driving force (F1) produced by the friction force between the upper and lower disk electrodes (101, 101') and a welding target (m); respective second measuring units (113, 123) for measuring a force (F2) resistant to the rotation of the upper and lower disk electrodes (101, 101'); and first and second motor force determining units (114, 124) for determining the driving force (F3) of upper and lower servomotors (107, 107') such that a condition (F1>F2) in which the measured driving force (F1) is always bigger than the measured force (F2) is achieved in order to prevent slippage between the disk electrodes (101, 101') and the welding target (m). The first and second motor force determining units (114, 124) determine the driving force of the upper and lower servomotors (107, 107') such that the force (F2) resistant to the rotation of the upper and lower disk electrodes (101, 101') has a minimum value in accordance with the static friction force and kinetic friction force which are calculated by the torque values of the upper and lower servomotors (107, 107'). According to the present invention, the speed of the mobile unit and the speed of the disk electrodes are synchronized in spite of the variation in the outer diameters of the disk electrodes, to thereby maintain welding quality at a constant level and to thus improve welding performance.
Abstract:
A tailored blank product used for partitioning a space into an inside and an outside such as a dashboard panel for partitioning a body into an engine room and a cabin and a method of manufacturing the product; the method, comprising the steps of pressing a thick plate blank and a thin plate blank after being welded by a mash seam welding or a laser beam welding, bending the thin plate blank until the inner surface of the thin plate blank becomes flush or generally flush with the inner surface of the thick plate blank, connecting a connection part having a part across a weld part to at least one of the outer and inner surfaces of the tailored blank product formed of the thick plate blank and thin plate blank, and painting the entire surface of the tailored product including the connection part, wherein the connection of the connection part to the tailored blank product performed before painting is performed with a portion of the product corresponding to the weld part of the connection part separated from the weld part, whereby a coating film can be formed surely on the welded part.
Abstract:
A container body (12) is made from a composite sheet (70) having a metal layer (72) which has at least one side covered by a corrosion-resistant layer (74), such as a layer of thermoplastic. The sheet (70) is moved under one or more high-pressure water jets which remove a strip of the corrosion-resistant layer (74) in the path of the water stream (82), leaving an exposed area (78). The composite sheet (70) may be segmented as necessary to form blanks (90) suitable for forming individual container bodies (12). Each blank (90) is formed generally into a tube or cylinder so that the corrosion-resistant layer (74) faces interiorly, and so that the exposed areas (78) are respectively located at overlapping ends of the blank (90). The overlapping, exposed areas (78) are then welded along a seam (62), forming a seal.
Abstract:
A double ply metal sheet for use in car construction has its stiffness increased and its weight reduced by comparison with metal sheets made of solid material. The embossed area of each boom raised above the base surface of the boom amounts to maximum 30 % of the total surface of each boom. A torque-transmitting auxiliary member is mounted between the centre lines of the bosses of each boom in contact with the bosses of the other boom. The torque vector lies in a plane parallel to the plane of the booms.