Abstract: Improved metallic rod product which substantially reduces die wear in wire drawing operations, and which provides other advantages during manufacturing. The exterior surface of the rod product is intentionally provided with a predetermined rough texture having certain characteristics, rather than the smooth bright surface conventionally imparted to metallic rod product intended for subsequent drawing into wire. Certain textured surface characteristics of the rod product reduce wear on the first few wire drawing dies by entraining lubricant as the rod moves through the dies, and carry the entrained lubricant into the dies, while at the same time avoiding some common wire drawing defects such as flakes and slivers. The textured-surface rod thus reduces frictional wear of the drawing dies, so that less force is required to draw the rod product through the dies and the useful life of the drawing dies is increased.

Abstract: The invention relates to star-shaped magnetic circuit elements. Such elements can be obtained by manufacturing a tore-shaped magnetic circuit element by winding a magnetic sheet strip around a pin. Then this tore-shaped element is pressed by converging equidistant pressing means. The obtained star is adapted to receive electrical coil bobbins on each of its legs and is accordingly adapted for constituting the core of a symmetrical star-shaped transformer.

Abstract: A machine for drawing a plurality of metal wires including alternate odd-numbered wires and even-numbered wires, in which a plurality of drawing drums are rotatable in two parallel rows, each individual drum having a plurality of tracks at least equal to the number of wires to be drawn, the wire moving along a path which changes direction by extending successively from a drum in one row to a drum in the other row. A group of dies is arranged between each successive pair of drums, one die in each group serving for the passage of one of the wires. Two final drums are provided, and two sets of dies are arranged at different levels between the penultimate drums and the two final drums. One set and one final drum serves for the odd-numbered wires and the other set and the other final drum for the even-numbered wires.

Abstract: Multiple elongated products are formed simultaneously from a single workpiece, coated with a lubricant or other fluent material, by forcing the workpiece against and through a die having multiple apertures. The apertures are so arrayed as to permit a relatively free flow of the coating material to each of the die apertures, including one or more generally central apertures. Preferred aperture configurations include straight line arrays and shallow curves, such as shallow "S"-shaped curves. The workpiece may advantageously correspond in general shape to that of the configuration of apertures in the die through which it is to be forced.

Abstract: A high pressure apparatus for reducing metal rod to wire in one pass through a die by surrounding the rod with a medium under high hydrostatic pressure to maintain ductility of the metal to be formed; the die is supported against a frame member by a die stem having a central opening through which the wire passes to a winding reel. To prevent clogging of the die stem with pressure medium that passes through the die in small quantities, the die stem is heated to a temperature substantially above the softening temperature of the pressure medium.

Abstract: An ironing ring for use in the manufacture of drawn and ironed unitary sheet metal can bodies made from flat rolled steel blackplate. The interior working surface of the ironing ring is treated by diamond wheel grinding, or the like, to form fine-line indentations which decrease the surface contact of the ironing ring with the metal surface being ironed. The linearly extended indentations extend over the entry portion of the ring to, or into, the dwell portion of the ring and help draw ironing lubricant into the ring during the ironing operation.

Abstract: A die for use in a hot hydrostatic extrusion process, in which a billet comprised of aluminum or an aluminum alloy or a billet having aluminum and an aluminum alloy at its outer periphery is preheated and charged into a container whereupon extrusion is carried out by means of a pressure medium, said die comprising a plurality of stepped conical portions serving as approach portions to the die outlet; said conical portions having conical surfaces whose opening angles increase from the inlet of the die toward the outlet thereof, said conical surface which is closest to said inlet having an opening angle of less than 60 degrees, and the difference between the opening angles between adjacent conical surfaces being less than 90 degrees.

Abstract: A bundle of hexagonal billets, each billet being coated with a shear transmitting medium, is extruded through one form of die having a plurality of hexagonal die apertures, to produce simultaneously a plurality of individual hexagonal wires. The bundle may be extruded though another form of die having a single die aperture with a transverse cross-section registering with the transverse cross-section of the bundle, to produce simultaneously a plurality of individual hexagonal wires. In each case, the billet material is advanced against and through the die by means of frictional or viscous drag force exerted along the surface of the billet material toward the die. The foregoing operations may also be applied to drawing.

Abstract: Wire drawing dies having improved life, relatively lower drawing force requirements and producing smooth surface on wires drawn therethrough comprise compacts of polycrystalline diamond, polycrystalline cubic boron nitride and mixtures thereof, which include a centrally-located double tapered hole having micro-rough walls, the micro-rough walls being densely packed with a lubricant for wire drawing.

Abstract: Continuous-strip process for improving ironing operations in the manufacture of drawn and ironed container bodies having a bottom wall and unitary sidewall. Strip surfaces are treated, in final cold reduction operations for flat rolled container stock, to produce sculptured surfaces with fine line impressions to hold lubricant on the exterior surface of the sidewall during ironing and to reduce intimate surface contact with the ironing mandrel on the interior surface. Electroplated protective coatings are not reflowed in order to maintain the surface indentations.

Abstract: A method for temper rolling of a thin-gauge steel strip comprising applying mechanical working to the steel strip under dry condition and then rolling the steel strip with lubricant between the rolling roll and the steel sheet.

Abstract: This invention relates to a wire processing machine comprising a die through which wire is drawn along a rectilinear path and a turning head downstream of the die at which the die-drawn wire is surface turned. The turning head is rotatably mounted in bearings which are oil-mist lubricated.