Abstract:
The present invention relates to an arrangement, draw plate and roll for the cold working of wire. The arrangement comprises a typical draw plate housing in which two roll shafts are mounted. The roll shafts have an appropriate profiled shape, e.g. oval or round, and the wire is rolled through the housing. The rolls are idling rolls and the wire is drawn through the rolls, although in the absence of contact with the draw plate housing.
Abstract:
Disclosed is a wire rolling machine. The machine comprises a first bobbin for paying off a wire wound thereon; a leveler unit for adjusting a height of the wire paid off from the first bobbin to ensure that the wire can be properly guided to a next position; a rolling stand unit having rolling rolls for continuously rolling the wire guided through the leveler unit; a feeder unit having a driving pulley and an idle pulley on which the wire rolled by the rolling stand unit is wound and pulled so that tensional feeding force is applied to the wire; and a winding unit for uniformly rewinding on a second bobbin the wire fed by the feeder unit.
Abstract:
A rolling device (11) capable of forming and opening a clearance (33) for rolling, wherein a material (35a) having a cross-section diameter varying in axial direction is formed, and a tapered finished product (35b) is formed of the material (35a) by die forging, whereby a reduction ratio of the cross-sectional area of the material (35a) formed by die forging is less than that obtained by forming a material having a cross-section diameter uniform in axial direction by die forging only and, in addition, the finished product (35b) can be formed in a short time and thus a tapered body excellent in characteristics and quality can be formed at a low cost.
Abstract:
Verfahren und Vorrichtung zum Umformen eines Stangenmaterials (1) wobei das Stangenmaterial (1) mit einem ersten Durchmesser (3) zunächst zu einem in Umfangsrichtung um das Stangenmaterial (1) umlaufenden Umformwerkzeug (2) zugeführt, dort durch das umlaufende Umformwerkzeug (2) hin zu einem kleineren zweiten Durchmesser (11) reduziert und dann durch eine, dem Umformwerkzeug (2) nachgeordnete Ablenkvorrichtung (4) gebogen wird, wobei das Biegen des Stangenmaterials (1) im Bereich einer Einflusszone (5) des Umformwerkzeugs (2) erfolgt.
Abstract:
Apparatus for reducing the diameter, rounding or straightening of pipe or tubing by rolling comprising a plurality of closely and equallyspaced, long, narrow, parallel-cylindrical rollers arranged in a parallelcylindrical array through which said pipe or tubing is passed at a constant linear speed, said rollers being skewed to displace their central contact zones radially inwards bringing them into forceful contact with the external surface of said pipe or tubing, and being rotated to cause said central contact zones to describe continuous, parallel, overlapping, helical paths along the external surface of said pipe or tubing and thereby to progressively apply locally to the whole of the external surface of said pipe or tubing a compressive force in excess of the yield strength of its material, causing said pipe or tubing to adopt a set at a smaller diameter.
Abstract:
Um ein Verfahren und eine Vorrichtung bereitzustellen, mit welcher bei der Herstellung von Hohlprofilen der gattungsgemäßen Art sehr hohe Reduzierungsgrade bei sehr hohen Fertigungsgeschwindigkeiten realisierbar sind und zugleich die Qualität des Endproduktes gehalten bzw. verbessert werden kann, wird mit der Erfindung verfahrensseitig vorgeschlagen, ein Verfahren zur Herstellung von Hohlprofilen mit definierten Querschnittsformen und -dimensionierungen aus Ausgangsmaterial in Form von Hohlprofilen mit größeren Durchmessern, wobei das Ausgangsmaterial durch Kombinationen von Streckreduktion und Ziehen durch Ziehdüsen zum gewünschten Hohlprofil ausgeformt wird. Die Erfindung umfasst auch eine Vorrichtung zur Durchführung des Verfahrens.
Abstract:
This method refers to a method by which the physical and mechanical properties intrinsic to a fine-grain structure may be formed in metal billets using pressure treatment. The method is designed to treat rods, bars and other particularly long billets. This method is designed to lower the cost of deformational treatment for long rods and large diameter billets and creates a pre-specified microstructure, including micro-crystal structure, and specific physical and mechanical properties. This may be achieved using various treatment techniques, one of which includes the deformation of at least a part of the billet through reduction of the billets cross-section. In this method, a long rod shaped billet is used. Reduction of the cross-section is achieved using tools that permit movement along and across the billet's axis as well as being rolled about its surface, for example, a roller. In this case at least one support stand is employed for correct placement of the billet. Additionally, a pre-specified strain level is achieved using at least one of the techniques of deformation: torsion, settling and extension using tools, for example the above-mentioned stand. The stand is designed to apply a specified scheme of deformation to the billet at the deformed (strained) section and at a specified temperature. This obtains specified structure with intrinsic physical and mechanical properties.
Abstract:
The method consists in profiling a part of a cylindrical pipe by drawing it through a forming instrument and in reducing the pipe along its whole length so that the diameter of the cylindrical section of the pipe is equal to the diameter of the circumscribed circle of its profiled section. The device for implementing the method comprises, mounted on a drawing bench, a reducing die (2) secured in a casing (1) and a drawing carriage. In front of the reducing die (2), on both sides of the passage of the pipe (5) to be made, are mounted cams (6) provided on their ends with forming rolls (7) and on the other ends with fork-shaped levers (8) co-operating with the drawing carriage by means of a tie-rod (11) with slots (10) in which are mounted locks (9) interacting with the fork-shaped levers (8). The device further comprises a rotatable lever (29) provided with a support roller (31) and mounted on the casing (1). One arm of the lever (29) co-operates through a support roller (31) with the pipe (5) to be profiled and the other arm is provided with hingedly secured stops (26) periodically interacting with the cams (6).