Abstract:
An exemplary embodiment of wire wrap welding system generally includes a headstock; a bed; a bed mounted tailstock linearly moveable in relation to the headstock; a linear induction drive system adapted to move the tailstock; a linear encoder system having a series of position encoders disposed on the bed; a servomotor adapted to rotate a headstock mounted spindle; a welding system positioned on the headstock, a servomotor positioned on the tailstock and adapted to rotate a tailstock mounted spindle; and a control system. An exemplary embodiment of a method for controlling slot openings between wire segments in a wire wrap welding process generally includes controlling movement of a bed mounted tailstock in relation to the rate of rotation of a headstock mounted spindle, utilizing a linear induction drive system, a linear encoder system, and a control system.
Abstract:
Es wird eine Vorrichtung zur Herstellung von Bewehrungsmatten aus Längs- und Querdrähten vorgeschlagen. Erfindungsgemäß sind die Längsdrähte (5, 5a, 5b) über eine Zuführeinrichtung (6) in mehreren Lagen, die jeweils insbesondere in einer Fläche liegen, derart zuführbar, dass die Längsdrähte einen dreidimensionalen Körper aufspannen, der über die Dicke der Längsdrähte hinausgeht und von mindestens vier Längsdrähten gebildet ist. Außerdem ist eine Schweißstation (10a) vorgesehen, in welcher die Längsdrähte (5, 5a, 5b) in der Anordnung des dreidimensionalen Körpers mittels in der Vorrichtung gebogenen Querdrähten (8) miteinander verschweißt werden. Des Weiteren werden ein Verfahren und eine Bewehrungsmatte vorgeschlagen.
Abstract:
Device and method for inserting, sectioning and fixing wire-like metal elements (6) into plastic materials enclosed between twinned metal nettings, particularly for introducing, defining and welding crosspieces in automatic "sewing" machines for producing sandwich prefabricated panels made of metal grids and expanded plastic material. The welding operation takes place by at least one pair of electrodes (9, 10) wherein a cutting insert (15) is embedded in one electrode (9) such the said electrodes serve also for sectioning the metal wire (6)and welding its apex with the weft wire (16) in a single station for the advancement of the product.
Abstract:
Vielpunkt-Schweissmaschine zum Herstellen von Drahtgitter matten aus einer Schar von parallelen Längsdrähten (L) und diese rechtwinkelig kreuzenden Querdrähten (Q1, Q2), die jeweils oberhalb und unterhalb der Längsdrähte einander gegenüberliegend angeordnet und mit den Längsdrähten verschweißt sind, mit Querdrahtzubringern, welche die Quersträhte aus Querdrahtkanälen (23, 23') in die Schweissebene zwischen die Längsdrahtschar und beiderseits derselben angeordneten Reihen von heb- und senkbaren oberen Schweisselektroden (7, 7') und unteren Schweisselektroden (8, 8') bringen, und mit je einer die Längsdrahtzuführebene (E-E) durchsetzenden Strombrücke (14, 14') für die Oberelektroden, wobei je ein Querdrahtkanal oberhalb und unterhalb der Längsdrahtzuführebene in Produktionsrichtung (P1) gesehen auf der Einlaufseite der Längsdrahtschar vor der durch die Ober- und Unterelektroden definierten Schweissebene (S-S) angeordnet ist und jeder Querdrahtzubringer einen gleichzeitig schwenk- und vorschiebbaren Zubringerarm (22, 22') aufweist, wobei die beiden Zubringerarme in einer synchronen Zuführbewegung (P4, P5) gleichzeitig die Querdrähte von den Querdrahtkanälen in die Schweissebene fördern und der obere Querdraht auf den Längsdrähten und der untere Querdraht auf den Unterelektroden abgelegt wird.
Abstract:
In a grid welding machine with a horizontal longitudinal wire guide path (4) and transverse wire feeders (27, 28) arranged above and below the latter and transverse rows of active welding electrodes (7, 8), the two rows of electrodes (7, 8) are moved up or down away from the longitudinal wire path (B-B) in synchronization with the welding cycle before transverse wires (Q1, Q2) are placed simultaneously on each side of the longitudinal wire assemblage (L). The transverse wires (Q1, Q2) are then brought into the welding position between the two rows of electrodes (7, 8) and the electrodes are applied to these transverse wires (Q1, Q2). Finally, a row of electrodes (7) are stopped as an abutment against which the welding pressure is applied through the other row of electrodes (8) so that a welding current flows between each electrode pair (7, 8) in series over the point of intersection of each longitudinal wire (L) with two contacting transverse wires (Q1, Q2).
Abstract:
Es werden eine Vorrichtung (14) zur Übergabe mindestens eines Ringes in eine Haltevorrichtung (21), eine Haltevorrichtung (21) für mindestens einen an mindestens einer Strebe zu fixierenden Ring und ein Verfahren zum Positionieren mindestens eines Ringes an mindestens einer Strebe vorgeschlagen, bei denen ein aufwändiges manuelles Einlegen der Ringe in eine Vorrichtung (Haltevorrichtung (21)) wesentlich vereinfacht und dadurch auch zeitlich verkürzt wird und ein positionsgenaues Anordnen eines Ringes an einer Strebe, welches durch Magnetkraft unterstützt wird, ermöglicht wird.
Abstract:
Improvements to the automatic device for the continuous production of electrically welded tridimensional metallic lattice girders, particularly those having an isosceles triangle cross-section. These improvements affect: the bending assembly and the underlying electric welding assembly (16), which is fixed with a distance of the electrodes (6, 7) that is adjustable in relation to the spacing of said lattice girder, for the simultaneous electric welding of the two bent lateral segments (1) to the two lower longitudinal members (5) of the lattice girder being formed; a lower movable slider (11) with automatic stroke for the forward advancement, with programmed spacings (P), of the two lower longitudinal members (5) together with the welded lateral bent segments (1); and finally the use of two cutting assemblies, one for each lower longitudinal member, capable of trimming the downward protrusions of the ends (1.1) of the welded segments (1). The movable slider (11), in addition to causing the advancement of the lower longitudinal members by the chosen spacing, positions them in the upper electric welding region (9), where simultaneous welding (10) of the central upper longitudinal member (15) to the bending points of the two lateral bent segments (1) occurs, again automatically, thus providing the permanent connection between the two lower longitudinal members (5) and the upper one (15). These improvements provide considerable advantages: by reducing production times, they also allow the height variation of the lattice girder being manufactured, they reduce maintenance in general and in particular electrode maintenance, improve the quality of the finished product, and finally ensure greater safety of the automatic device.
Abstract:
A rod-based well screen is formed in place on a perforated pipe base by wrapping wire around the pipe base and a plurality of rods located around the outside of the pipe. The wire is welded sequentially to each individual rod as it is wrapped around the pipe. The welding and ground electrodes engage the wire and the rods respectively. The rod engaging ground electrode is positioned a short distance ahead of the wire being wrapped around the rods and the pipe base. The ground electrode Includes a plurality of contacts. Each contact is mounted to pivot toward and away from a rod. Springs urge each contact toward a rod to hold the rod against the outside surface of the pipe base and to maintain good electrical contact between the contact and the rod.
Abstract:
A method for making an implantable stent includes the steps of (i) providing a plurality of elongate stent wires; (ii) forming said wires into a hollow tubular structure having opposed first and second open ends; (iii) terminating said wires at the second end; (iv) aligning the wires at the second end into a plurality of mated adjacent wires to define a plurality of abutting regions; (v) welding the mated adjacent wires to one and the other at the abutting regions to define a plurality of welds; and optionally (vi) chemically or electrochemically removing a portion of the welds. The method may further include the steps of (a) extending at least one of the mated stent wires to provide an extended stent wire; (b) looping the extended stent wire so the extended end abuts a proximal pair of stent wires; and (c) welding the extended and looped wire to the proximal pair of wires. The step of looping may include the forming of the wire into an equilaterally arched loop having an apex, but not having other sharp bends.
Abstract:
A self-contained factory unit for manufacturing load bearing building panels is provided. The factory unit includes an apparatus comprising means for forming structural foam blocks, means for cutting the foam blocks into strips, means for forming lengths of truss, means for assembling lengths of truss and foam strips together and means for attaching transverse members to the trusses in order to form the load bearing panels. The factory unit also has a source of electrical energy, a source of compressed air, and a prime mover such as an internal combustion engine. The apparatus for forming the truss comprises a plurality of interacting arms which move into and out of engagement with a wire, bending it into a zig-zag shape, and means for attaching a straight wire to each side of the zig-zag shaped wire. The zig-zag wire is then cut to an appropriate length. The lengths of zig-zag wire are then assembled with strips of foam so that the lengths of foam and truss alternate with one another. The trusses and foam strips are then positioned relative to one another so that the trusses project substantially the same amount from the foam strips and trusses. Transverse wires are then attached to the sides of the assembly of foam strips and trusses to form the load bearing panel. The apparatus for attaching strapping wires comprises means for gripping, tensioning and positioning each wire to be welded, and means for welding the wire to the trusses.