Tool Comprising Closed Periphery Deforming Passageway Patents (Class 72/467)
  • Patent number: 4493229
    Abstract: A method of forming an extrusion die comprises forming an extrusion aperture in a die piece, forcing a flowable material partly through the extrusion aperture so that the leading surface of the material becomes deformed in the extrusion direction, and then removing the exposed surface of the extrusion aperture, by chemical or electro-etching, so that the effective axial bearing depth of the extrusion aperture at any location around its periphery corresponds to the deformation of the leading surface of the flowable material at that location. The axial bearing depth of the completed die at any location is thus inversely proportional to the resistance to flow at that location, resulting in substantially uniform flow over the whole of the die aperture.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: January 15, 1985
    Assignee: Hobson Limited
    Inventors: David E. Stewart, George R. Nicholson
  • Patent number: 4485663
    Abstract: This disclosure relates to a product, the process for making same from precoated metal and the tool used for making the product. The product is a concurrently drawn and ironed sanitary food can wherein the side wall thickness of the container is relatively uniform and approximately 0.001" thinner than the thickness of the starting material. The process is a concurrent multiple drawing and ironing operation wherein the diameter and the wall thickness are reduced in each of a plurality of operations. Finally, the tools used for each drawing and ironing operation have particular configurations designed to permit this concurrent forming of both the diameter and the side wall thickness.
    Type: Grant
    Filed: December 13, 1983
    Date of Patent: December 4, 1984
    Assignee: American Can Company
    Inventors: Vance B. Gold, Thomas L. Phalin
  • Die
    Patent number: 4468947
    Abstract: A die is described, comprising a die body and a steel case, characterized in that: a die body made of a silicon nitride ceramic or a silicon carbide ceramic is shrink fitted or force fitted into a steel case wherein an optional wide recess may be cut in the inner surface of the bottom of said steel case along a corner where the bottom and the inner wall of said steel case meet.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: September 4, 1984
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Tooru Takeda, Masakatsu Hayakawa, Yasuo Inoue
  • Patent number: 4468945
    Abstract: In continuous friction-actuated extrusion, especially Conform extrusion of copper, at least part of the tooling is made from aged nickel-chromium base alloy (which is preferably cold-worked before aging to give a yield strength of at least 1500 MN/m.sup.2 at 20.degree. C.) and which is capable of sustaining an adherent oxide film. The preferred alloy is "Inconel Alloy 718". Despite lower hardness, the tooling has better service life than conventional special-steel tooling.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: September 4, 1984
    Assignee: BICC Public Limited Company
    Inventor: Norman R. Fairey
  • Patent number: 4462242
    Abstract: This disclosure relates to the construction and method of using synthetic diamond dies for drawing wire through a land or throat of a passage through the diamond die with the land or throat located midway between the opposite sides of the synthetic diamond and with approach passages located at opposite ends of the land so that the wire can be pulled through the die in either direction. This increases the useful life of the die before it becomes necessary to resize the die. The object of the invention is to reduce the cost of wire drawing through synthetic diamond dies.
    Type: Grant
    Filed: September 2, 1982
    Date of Patent: July 31, 1984
    Assignee: GK Technologies, Incorporated
    Inventor: Allen C. Morgenthaler
  • Patent number: 4403491
    Abstract: A die member has a conical bore with a cylindrical extension, and a shallow groove in the conical bore; a conical mandrel with a cylindrical extension fills the conical bore, except for the groove which merges into an annular space between the cylindrical bore and the extension. A metal strip is pulled through the groove and the space is to be folded into a split tube.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: September 13, 1983
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Johannes Wassen, Siegfried Honisch
  • Patent number: 4397080
    Abstract: A process for preparation of support tooling for extruding dies is described in which a substantial reduction in machining is experienced by utilizing a pattern destroying precision casting system in which the pattern is adjusted to shrinkage and provided with a die orifice opening staged up in size to suit the particular support role of the tooling as in a backer or bolster. This is significant because such support elements are regarded as one-of-a-kind structures. Finish machining and treatment requires minimal time and at substantial energy reduction. The pattern is prepared from a destructible or vaporizable plastic material replaced by the molten metal conforming to the mold configuration.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: August 9, 1983
    Assignee: Me-U-Sea, Inc.
    Inventor: Jay H. Muusse
  • Patent number: 4383429
    Abstract: The apparatus of the invention is characterized by comprising a die through which the end of the tube is passed in order to form the point, and which is provided with a first substantially cylindrical bore of diameter less than the diameter of said tube, a substantially conical second bore coaxial with the preceding and of which the minimum diameter is equal to the diameter of said first bore and the maximum diameter is greater than the diameter of the tube, and at least three revolving bodies disposed in corresponding seats of said die, each of which projects radially to a predetermined extent from the surface of said second bore towards the axis of the bore itself, and drive means arranged to axially move said die relative to said tube in order to bring the end of the tube inside said first and second bore and into cooperation with said revolving bodies.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: May 17, 1983
    Assignee: La Metalli Industriale S.p.A.
    Inventor: Bruno Ceccacci
  • Patent number: 4378690
    Abstract: To provide intimate contact between a sinter body holding a drawing die in ontact with a die support carrier, so that the setting will fit into a cup-shaped die holder, the carrier is a disk element having a base plate from which a stub leg, preferably in frusto-conical form, extends, defining a reentrant surface, the wider portion of which is spaced from the base plate, with a seating surface extending therefrom for the die, and the sinter body surrounding the die, extending into the reentrant surface defined by the conical projection of the stub leg from the base plate, and extending beyond the die, and fitting in the die holder, the setting being inserted in the die holder with the sinter body against the bottom of the cup-shaped die holder to accept compressive forces upon drawing of wire in the direction from the base plate through the diamond and then through the sinter holder, that is, reversed with respect to the customary direction, so that the sinter body will be placed under compression and in inti
    Type: Grant
    Filed: January 7, 1981
    Date of Patent: April 5, 1983
    Assignee: Patent-Treuhand-Gesellschaft fur Elektrische Gluhlampen mbH
    Inventors: Wolfram Stiebritz, Georg Sitterer, Klaus Seidel
  • Patent number: 4377943
    Abstract: A hydrostatic extrusion die includes a nose-cone section (21) of a high toughness tool steel and a mating rear section (22) of a high compressive strength material such as carbide. During extrusion, inwardly directed radial forces (F.sub.r ') are developed in the rear section which exactly compensates for the outwardly directed radial forces (F.sub.o) developed at the throat of the die.
    Type: Grant
    Filed: March 2, 1981
    Date of Patent: March 29, 1983
    Assignee: Western Electric Co., Inc.
    Inventor: Francis J. Fuchs, Jr.
  • Patent number: 4365502
    Abstract: A wire drawing die and method for making the same in which a blank having a cylindrical core of a hard, wear-resistant material located randomly in the blank is initially attached to a circular metal plate having a concentric central opening, thus forming an assembly with the core being concentric to both the plate and the opening. A metal casing is provided having a cylindrical cavity proportioned to accommodate the plate with a close fit. A first brazing disc is placed on the cavity bottom. The assembly is inserted in the case cavity over the first brazing disc with the blank facing either toward the top or bottom of the cavity. Powder metal may be placed between the blank and the cavity. A second brazing disc is then placed over the assembly and the powder metal. A metal plug is provided with its outside diameter proportioned for a close fit with the case cavity and may have an interior cavity proportioned to accommodate the blank.
    Type: Grant
    Filed: November 19, 1980
    Date of Patent: December 28, 1982
    Assignee: Fort Wayne Wire Die, Inc.
    Inventor: Charles Carson
  • Patent number: 4350865
    Abstract: A method and tool for making an extrusion die wherein the extrusion has a lobed helical outer contour. An electrical discharge machining electrode has an identical outer contour. Mounted integrally with the electrode is a lead bar having a guide recess that makes a second helix angle with respect to the axis of the electrode. A guide pin fixedly mounted with respect to the moving assembly is located within the recess. Axial movement and rotation of the electrode through the die blank is controlled by the pin and recess.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: September 21, 1982
    Assignee: Ford Motor Company
    Inventor: Benjamin I. Bachrach
  • Patent number: 4333986
    Abstract: The invention relates to a diamond sintered compact wherein diamond crystal particles are uniformly oriented in a particular direction and the method for producing the same, and has for an object to provide a diamond sintered compact having a high thermal conductivity particularly suitable for heat sink for use in the field of electronics.According to the invention, graphite is used as carbonaceous raw material, diamond crystal particles having such elongated shape that the ratio of the length of the long axis to that of the short axis is more than 2 being synthesized in such state that the greater part of the crystal particles have their long axes uniformly oriented in a particular direction, the crystal particles being sintered in the direction of the long axes thereof so that transformation of the graphite into diamond and sintering thereof may be accomplished synchronously.
    Type: Grant
    Filed: June 10, 1980
    Date of Patent: June 8, 1982
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazuo Tsuji, Shuji Yazu, Akio Hara
  • Patent number: 4308044
    Abstract: A die (10, 40) for extrusion of optical grade fibers includes an insert (12, 42) placed under compression within a sleeve (14, 44). Tapered surfaces (18, 20 & 48, 50) between the insert and the sleeve enable axial assembly of the components when the insert is forced within the sleeve. Lubrication and interlocking between the components comprise either general lubricant and an interlocking ring (30) residing within grooves (26, 28) in the tapered surfaces, or a metal (60) which provides first a lubrication during assembly of the components and then a metallurgical diffusion bond therebetween.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: December 29, 1981
    Assignee: Hughes Aircraft Company
    Inventor: Jon H. Myer
  • Patent number: 4287749
    Abstract: A sleeve having a tapered outer surface is shrink or interference fitted over the outer surface of a die blank in which is formed a central bore, a larger diameter bore and a transition bore therebetween. The diametrical interference between the sleeve and the die blank is effective in producing an elastic deformation of the smaller diameter bore causing it to assume a conical shape. The die blank and sleeve are restrained within a casing and the inner surface of the die is formed by electrical discharge machining, electrical chemical machining or by other known methods. The die casing and sleeve are removed from the die, allowing the release of the stored strain energy of deformation which causes the smaller bore of the die to assume a conical shape tapering radially outwardly from its inner extremity. The sharp corner that results at the innermost end of the smaller bore is removed by lapping a straight-sided tool through the central opening of the die.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: September 8, 1981
    Assignee: Ford Motor Company
    Inventors: Benjamin I. Bachrach, William J. Fuhrman
  • Patent number: 4270373
    Abstract: A rod in the form of a composite metal wire having a harder metal core surrounded by a softer metal cladding is introduced together with lubricant into a die comprising an approach which includes a first frustoconical opening defining a vertical angle between 0.degree. and 5.degree. (exclusive of 0.degree.) and a second frustoconical opening defining a vertical angle between 6.degree. and 20.degree.. The lubricant is pressurized in the first frustoconical opening of the die approach while the rod is drawn under fluid lubrication.
    Type: Grant
    Filed: May 30, 1979
    Date of Patent: June 2, 1981
    Inventors: Motoshiro Hirato, Hazime Kawagoe, Kazuo Abe, Tsuyoshi Sato, Yasuhiko Miyake, Masahiro Nagai, Katsuhisa Furuichi, Kiyoshi Shimojima
  • Patent number: 4270380
    Abstract: A die assembly comprises a steel casing shrink-fitted onto and holding a ceramic die nib for extruding, drawing, ironing and the like of ferrous and nonferrous metal stock, especially in hot workable condition. The assembly includes an interlayer between the nib and casing to accommodate imperfect dimensional mating of adjacent shrink-fitted surfaces of the nib and casing. The interlayer is composed of all-crystalline ceramic material having a heating liquidus temperature within the range of 500.degree.-570.degree. C. Rigidity of solidified interlayer maintains uniform shrink-fitted compression on nib during usage of the assembly. Nib and preferred lead-zinc-borate devitrified glass interlayer are easily, jointly removable from casing and leave casing clean for reuse without affecting its case-hardening properties.
    Type: Grant
    Filed: May 25, 1979
    Date of Patent: June 2, 1981
    Assignee: Corning Glass Works
    Inventors: Suresh T. Gulati, Henry E. Hagy
  • Patent number: 4260397
    Abstract: An improvement for making polycrystalline compacts containing single crystal diamonds embedded therein is disclosed. Cracking of such compacts is minimized by isolating the diamond in a relatively compressible matrix before exposing the sample to high pressure-high temperature sintering conditions. This may be done, for example, by mixing the diamond crystals with graphite or amorphous carbon powder. Useful devices which can be made from such compacts are cutting tools and wire drawing dies.A sectional view of a wire die blank of this invention is depicted in FIG. 3. One single crystal diamond 12 is embedded in polycrystalline diamond matrix 14 which has been sintered within cemented tungsten carbide ring 16. The wire is drawn through aperture 18. It is felt that this type of die would improve the wire finish while helping to prevent the failure of the single crystal through cleavage. It is useful in drawing wires made of such materials as tungsten, copper coated steel, copper and nickel.
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: April 7, 1981
    Assignee: General Electric Company
    Inventor: Harold P. Bovenkerk
  • Patent number: 4254652
    Abstract: An ironing die for use with a punch to reduce the wall thickness of the sidewall of the metal cup includes a body which has a circular opening therein extending from the leading surface to a trailing surface that are parallel to each other and the opening has a land spaced from both surfaces which defines a minimum diameter for the opening. The opening also has a cylindrical portion between the land and the trailing surface which has a diameter slightly larger than the minimum diameter to guide the cup after the free edge moves past the land. The opening is also flared outwardly between the land and the leading surface to produce an entry portion which guides the cup to a centered position with respect to the ironing land. In one embodiment, the wall which defines the opening also has a cut out portion between the land and the cylindrical portion.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: March 10, 1981
    Assignee: National Can Corporation
    Inventor: Harry P. Proctor
  • Patent number: 4241625
    Abstract: A metal casing is provided having flat, parallel front and back sides. A first cylindrical cavity having a bottom wall is formed in the front casing side. A cylindrical metal plug having top and bottom ends is secured by heat shrinking in the first casing cavity, the bottom end having a second, concentric cylindrical cavity formed therein and engaging the bottom wall of the cavity. A cylindrical metal blank having opposite ends and a concentric core formed of a synthetic hard, wear-resistant material, such as polycrystalline aggregate of synthetic or natural diamond or polycrystalline cubic boron nitride, is secured in the second cavity by heat shrinking with one end engaging the bottom thereof and the other end engaging the first casing cavity bottom wall.
    Type: Grant
    Filed: March 8, 1979
    Date of Patent: December 30, 1980
    Assignee: Fort Wayne Wire Die, Inc.
    Inventors: Lawrence W. Corbin, Charles Carson
  • Patent number: 4232541
    Abstract: A method and apparatus for improving the interior or exterior surface smoothness of a tube shell during cold draw operations is disclosed wherein the final reduction of the tube shell is completed within the die land.
    Type: Grant
    Filed: January 23, 1979
    Date of Patent: November 11, 1980
    Assignee: The Babcock & Wilcox Company
    Inventor: Paul E. Stump
  • Patent number: 4228673
    Abstract: A draw or ironing die assembly includes a housing having a minimum modulus of elasticity of 50,000,000 p.s.i. and an axial hole therethrough. A die wear ring of greater elastic modulus and greater hardness is shrunk fit into the axial hole. Tungsten carbide is a suitable material for each part.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: October 21, 1980
    Assignee: Carmet Company
    Inventor: Frank R. Scheel
  • Patent number: 4211104
    Abstract: A cold drawing die for drawing round bar stock into shapes such as polygons. The die acts continuously on the full circumference of the round bar stock to uniformly deform the stock and yield polygons to exacting specifications using a starting material only slightly larger than the maximum diameter of the finished shape. A pure polygon and a hybrid polygon shape are disclosed.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: July 8, 1980
    Assignee: Barnabo Steel Corporation
    Inventors: Robert E. Barnabo, Karl J. Hyslop
  • Patent number: 4187711
    Abstract: A method of manufacturing a high fin density heat dissipator is disclosed in which the dissipator is extruded through a die in a partially cylindrical shape with the elongated fins arranged on the base and extending radially therefrom. The extruded dissipator is straightened under tensile and bumping forces in a manner such that the base assumes a planar shape and the fins become substantially parallel to each other. Apparatus for straightening the extruded dissipator and a die for extruding the same are illustrated and described.
    Type: Grant
    Filed: July 24, 1978
    Date of Patent: February 12, 1980
    Assignee: Wakefield Engineering, Inc.
    Inventors: Ronald B. Lavochkin, Thomas D. Coe
  • Patent number: 4186825
    Abstract: A brake adjuster providing compensation for brake wear. Fundamentally, the invention includes a casing attached to a brake housing and maintaining a spring follower therewithin. A shaft or pin is connected to the pressure plate of a brake assembly and is interconnected with a reshapable tube. The shaft and tube pass through a die which makes swaging engagement with the tube. As the brakes wear, the tube is drawn through the die and is progressively swaged along the length thereof. The spring follower acts against the die to urge the die, tube, and shaft to a return position following release of brake pressure. Such action releases the pressure plate from forceful engagement with the brake disk stack. In an alternative embodiment, the shaft can be eliminated and one end of the reshapable tube can be connected directly to the pressure plate or to a suitable connection member on the pressure plate.
    Type: Grant
    Filed: August 14, 1978
    Date of Patent: February 5, 1980
    Assignee: Goodyear Aerospace Corporation
    Inventor: Paul E. Milliken
  • Patent number: 4179909
    Abstract: A domer assembly which cooperates with the punch of a drawing and ironing machine to reform an end wall of a container includes a support that has a flat supporting surface defined in the bottom of a recess and a carrier element having a cooperating surface engaging the flat bottom surface. A domer element is supported on the carrier element and both are movable as a unit radially of the path of movement of the punch and are normally centered with respect to the axis of the punch through biasing springs which will accommodate radial movement. The assembly also includes means for supplying air between the surfaces to act as a fluid bearing and reduce friction.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: December 25, 1979
    Assignee: National Can Corporation
    Inventor: Edward G. Maeder
  • Patent number: 4169366
    Abstract: The invention concerns a device for the extrusion of hollow or semi-hollow sections which are made in particular of a light metal. The device has at least one mandrel head on a mandrel support projecting into a die opening, the mandrel head being a special insert-type mandrel which is held in place on the mandrel support by a connecting device.
    Type: Grant
    Filed: December 6, 1976
    Date of Patent: October 2, 1979
    Assignee: Swiss Aluminium Ltd.
    Inventor: Adolf Ames
  • Patent number: 4157654
    Abstract: A method of forming a tube by pushing it through a tilted die to form a bend or change circumferential variations in wall thickness.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: June 12, 1979
    Assignee: The Babcock & Wilcox Company
    Inventors: Kurt J. Kahlow, Richard L. Holbrook
  • Patent number: 4157024
    Abstract: A method and apparatus of forming a tube by pushing it through a die to form high quality tubular fittings.
    Type: Grant
    Filed: January 3, 1978
    Date of Patent: June 5, 1979
    Assignee: The Babcock & Wilcox Company
    Inventors: Kurt J. Kahlow, Richard L. Holbrook
  • Patent number: 4145910
    Abstract: A reusable draw or ironing die includes a tool steel body having an axial hole therethrough. A first carbide insert is shrunk fit into the axial hole and a second carbide insert is press fit within the first carbide insert.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: March 27, 1979
    Assignee: Carmet Company
    Inventor: Frank R. Scheel
  • Patent number: 4144739
    Abstract: A wire drawing die includes a metal casing having flat, parallel front and back sides. A first cylindrical cavity having a bottom wall is formed in the front casing side. A cylindrical metal plug having top and bottom ends is secured in the first casing cavity, the bottom end having a second, concentric cylindrical cavity formed therein. A cylindrical metal blank having opposite ends and a concentric core formed of a synthetic hard, wear-resistant material, such as polycrystalline aggregate of synthetic diamond or polycrystalline cubic boron nitride, is closely fitted in the second cavity with one end engaging the bottom thereof and the other end engaging the first casing cavity bottom wall. The top end of the plug and the back side of the casing have concentric countersunk openings therein respectively extending therethrough to the core, and the core has a concentric die opening therethrough communicating between the countersunk openings.
    Type: Grant
    Filed: October 13, 1977
    Date of Patent: March 20, 1979
    Assignee: Fort Wayne Wire Die, Inc.
    Inventor: Lawrence W. Corbin
  • Patent number: 4137745
    Abstract: In a device for extruding hollow articles, e.g. tubes, the die is rotatably mounted in the die holder. The die has a hole for shaping the external surface of the tube. The axis of said hole is eccentric relative to the axis of the external surface of the die holder. The device comprises a needle for shaping the internal surface of the tube, the needle entering the die hole during the process of extrusion. The needle axis coincides with the extrusion axis. The die holder is made of at least two bushings, installed one inside the other. The axes of the internal surfaces of the bushings are offset relative to the axes of their external surfaces. The bushings are capable of turning for adjusting the position of the die hole axis relative to the needle. This design of the die holder makes it possible to minimize the eccentricity of the axes of the internal and external surfaces of the tubes extruded in the device realized according to the present invention and installed in a conventional press.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: February 6, 1979
    Inventors: Rustem I. Muratov, Jury D. Kot, Mikhail F. Belov, Melis S. Gildengorn, Vyacheslav S. Konkov, Mikhail I. Erlikh
  • Patent number: 4129024
    Abstract: Elongated, thin wall shells are formed from substantially circular blanks cut from sheet material by steps including providing a blank in a blank holder on a die having an effective entrance and exit aperture, the entrance aperture having an extent substantially commensurate in size with the size of the blank to be drawn, the die having a cavity, the wall of which converges inwardly from the entrance aperture to the effective exit aperture. The wall connecting the entrance and exit apertures is defined by an arc of a sector of a circle, the sector having an angle in the range of 12.degree. to 34.degree.. The thin wall shell is formed by displacing the blank through the die by action of a punch.
    Type: Grant
    Filed: November 9, 1977
    Date of Patent: December 12, 1978
    Assignee: Aluminum Company of America
    Inventor: Charles H. Deveney
  • Patent number: 4129052
    Abstract: A wire drawing die employing a synthetic hard, wear-resistant material, such as a polycrystalline aggregate of synthetic diamond or a polycrystalline cubic boron nitride includes a metal casing having flat, parallel front and back sides. A cylindrical cavity is formed in the front casing side having a flat bottom, the side wall of the cavity being undercut adjacent the bottom. A first layer of metal powder is deposited in the casing cavity covering the bottom and the undercut. An annular metal blank having flat opposite sides and a core formed of the hard, wear-resistant material is placed on the first metal powder layer and adhered thereto, the core being concentric with the cavity. A second layer of metal powder is deposited in the cavity covering the first layer and the blank, the metal powder of both layers having a melting point lower than the thermal degradation temperature of the core.
    Type: Grant
    Filed: October 13, 1977
    Date of Patent: December 12, 1978
    Assignee: Fort Wayne Wire Die, Inc.
    Inventor: Paul Bieberich
  • Patent number: 4096721
    Abstract: The disclosure concerns methods and apparatus for forming an elongated product, having a high quality surface appearance and finish, from an elongated workpiece with a wax coating. The wax-coated, elongated workpiece is advanced toward, and then through, an aperture which extends longitudinally through a die, by an application of frictional drag forces, in the direction of the die, to the wax coating. The wax, however, does not pass through the die aperture, but rather is substantially completely removed from each successive element of the elongated workpiece, substantially as such element reaches the die.
    Type: Grant
    Filed: April 25, 1977
    Date of Patent: June 27, 1978
    Assignee: Western Electric Company, Inc.
    Inventors: Nazeer Ahmed, Ivan Gerald Histand
  • Patent number: 4095449
    Abstract: A punch used for extruding tin plated cans consisting of a cemented tungsten carbide punch body coated with a thin layer of titanium nitride.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: June 20, 1978
    Assignee: The Valeron Corporation
    Inventors: Frank George Roach, Paul Fred Woerner
  • Patent number: 4080817
    Abstract: Fine wire of indefinite length is produced at a high rate and in an economical manner from the surface of a billet, sheet or the like by creating a swelling on the surface of the work and forcing the swelling through a die in a single step.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: March 28, 1978
    Inventor: Maurice Bastide
  • Patent number: 4072034
    Abstract: Method and apparatus for deforming the section of material by forcing it, e.g. punching or drawing it, through a die. The die, die holder and workpiece are vibrated in tune, e.g. acoustically, so that points on the walls of the die orifice oscillate in a direction lying generally radial to the die axis. This causes the die to exert a swaging action upon the material and contribute to the deformation thus reducing the power needs for forcing the workpiece through the die and increasing the maximum deformation obtainable.
    Type: Grant
    Filed: July 24, 1975
    Date of Patent: February 7, 1978
    Assignee: National Research Development Corporation
    Inventors: Graham R. Dawson, Dennis H. Sansome
  • Patent number: 4072037
    Abstract: A plurality of separate, elongated, metallic members, such as wires, are formed simultaneously, e.g., through the application of hydrostatic extrusion techniques, by passing a single metallic workpiece through a die with a plurality of apertures. The apertures extend longitudinally through the die from an entry wall of the die, and are so arrayed, and the die entry wall includes surfaces which are so configured, as to cooperate to create cross-shear stresses in the material of the workpiece in the vicinity of the apertures. These cross-shear stresses separate, or assist in separating, the workpiece into a plurality of elongated members, so that the forming process may take place at reduced operating pressures.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: February 7, 1978
    Assignee: Western Electric Co., Inc.
    Inventor: Francis J. Fuchs, Jr.
  • Patent number: 4055073
    Abstract: An improved contoured orifice configuration in the interior of a forming die for manufacturing elongated twist bodies of non-circular cross-section is described. A prescribed interior portion of the orifice in the die is formed with a cross-section corresponding to the cross-section of the body. The portion of the orifice upstream of the interior forming section is similar to the interior cross-section but increases along a spiral path that terminates at the upstream end surface of the die. A localized region of the orifice immediately upstream of the interior portion extends generally tangentially to the angle of twist of the twist body.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: October 25, 1977
    Assignee: Sigma Lutin, narodni podnik
    Inventor: Oldrich Langr
  • Patent number: 4051706
    Abstract: Anisotropic permanent magnets of Mn-Al-C polycrystalline alloy are produced by warm extrusion at a temperature of 530.degree. to 830.degree. C utilizing converging or tapered dies with lubricant interposed between the polycrystalline body and the converging die. With dies of rather small semiangles, alloys with improved magnetic properties with regard to (BH)max, and especially Br are obtained.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: October 4, 1977
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoichi Sakamoto, Nobuyuki Kato, Tadao Ohtani
  • Patent number: 4040282
    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.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: August 9, 1977
    Assignee: National Steel Corporation
    Inventor: William T. Saunders
  • Patent number: 4038859
    Abstract: A metal forming die having a unique profile is provided for use in producing cylindrical articles of elongated sidewall configuration. Most notably, the die is applicable to the production of drawn and ironed can shells.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: August 2, 1977
    Assignee: American Can Company
    Inventor: John Pavleszek
  • Patent number: 4038858
    Abstract: A complete all-ceramic die for use in wire-drawing operations includes a new and novel approach zone, bearing zone and back relief to thereby eliminate lubrication of the die and unwanted lubrication dust and wire scales.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: August 2, 1977
    Assignee: Rose M. DeZuba
    Inventor: James M. DeZuba
  • Patent number: 4036043
    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.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: July 19, 1977
    Assignee: Kobe Steel Ltd.
    Inventors: Yoshihiro Yamaguchi, Tomiharu Matsushita, Masataka Noguchi, Hideaki Ide, Kunihiko Nishioka
  • Patent number: 4027518
    Abstract: A hydraulic press for metal working of end portions of rod-like or pipe-like metallic work pieces comprising a clamping device for arresting the work piece, and a hydraulic press cylinder, having piston rods which move toward the work piece. Working tools are disposed on the piston rods, and press cylinders are disposed on both sides of said clamping device, whereby the piston rods of the press cylinders are moved toward each other in a longitudinal direction of the work piece.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: June 7, 1977
    Inventor: Erich Ribback
  • Patent number: 4018075
    Abstract: When cylindrical parts are produced by extrusion from a metallic material having high mechanical strength, the dies tend to be easily broken and worn, and it is difficult to secure accuracy of finishing of the product.According to the present invention, with regard to the form of a die, the ironing portion is reduced in contact area thereof, is formed into such a configuration that the contact area thereof does not increase even if the dies are worn to some extent, and a die angle and configurations of an ironing portion and a relief portion are selected properly, thus preventing the dies from being easily broken or worn.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: April 19, 1977
    Assignee: Hitachi, Ltd.
    Inventors: Hiroyuki Kawawa, Yasushi Ohuchi, Hisanobu Kanamaru
  • Patent number: 4016736
    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.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: April 12, 1977
    Assignee: General Electric Company
    Inventors: Lynn Cloyd Carrison, Robert George Wetzel
  • Patent number: 4015459
    Abstract: Multiple gauge metal strip is prepared by a process which comprises shaping strip material of rectangular cross section to form regions of at least two variable thicknesses defining a stepped surface configuration in at least one of the broad surfaces of said strip, and drawing the shaped strip through a die which defines said cross sectional configuration to produce a reduction of said strip to final dimension, wherein said drawing step is performed without direct surface-to-surface contact between said strip and said die, such that the width dimension of said strip is unchanged and the ratio of strip surface to strip cross sectional area changes by at least 30%. The drawing method of this invention employs hydrodynamic lubrication and can achieve one-pass cross sectional reductions of from 39 to 55%.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: April 5, 1977
    Assignee: Olin Corporation
    Inventors: Joseph Winter, Eugene Shapiro, Warren F. Smith
  • Patent number: 3999415
    Abstract: Die arrangement for use with conventional and hydrostatic extrusion presses consisting of a first die for providing a first extruded section of a billet and a second die cooperating with the first die to further extrude said first extruded section to final shape. Successive dies beyond the second die are contemplated to provide successive step-wise extrusion for greater reductions, especially of large billets. The method of the invention comprises step-wise incremental sequential extrusion of the billet and extruded portions of the billet until the final shape is achieved.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: December 28, 1976
    Inventor: Alfred Robertson Austen