Tool Comprising Closed Periphery Deforming Passageway Patents (Class 72/467)
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Patent number: 4493229Abstract: 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: GrantFiled: May 25, 1983Date of Patent: January 15, 1985Assignee: Hobson LimitedInventors: David E. Stewart, George R. Nicholson
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Patent number: 4485663Abstract: 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: GrantFiled: December 13, 1983Date of Patent: December 4, 1984Assignee: American Can CompanyInventors: Vance B. Gold, Thomas L. Phalin
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Patent number: 4468947Abstract: 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: GrantFiled: December 28, 1981Date of Patent: September 4, 1984Assignee: NGK Spark Plug Co., Ltd.Inventors: Tooru Takeda, Masakatsu Hayakawa, Yasuo Inoue
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Patent number: 4468945Abstract: 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: GrantFiled: July 19, 1982Date of Patent: September 4, 1984Assignee: BICC Public Limited CompanyInventor: Norman R. Fairey
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Patent number: 4462242Abstract: 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: GrantFiled: September 2, 1982Date of Patent: July 31, 1984Assignee: GK Technologies, IncorporatedInventor: Allen C. Morgenthaler
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Patent number: 4403491Abstract: 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: GrantFiled: November 2, 1981Date of Patent: September 13, 1983Assignee: Mannesmann AktiengesellschaftInventors: Johannes Wassen, Siegfried Honisch
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Patent number: 4397080Abstract: 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: GrantFiled: November 10, 1980Date of Patent: August 9, 1983Assignee: Me-U-Sea, Inc.Inventor: Jay H. Muusse
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Patent number: 4383429Abstract: 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: GrantFiled: March 9, 1981Date of Patent: May 17, 1983Assignee: La Metalli Industriale S.p.A.Inventor: Bruno Ceccacci
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Patent number: 4378690Abstract: 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 intiType: GrantFiled: January 7, 1981Date of Patent: April 5, 1983Assignee: Patent-Treuhand-Gesellschaft fur Elektrische Gluhlampen mbHInventors: Wolfram Stiebritz, Georg Sitterer, Klaus Seidel
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Patent number: 4377943Abstract: 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: GrantFiled: March 2, 1981Date of Patent: March 29, 1983Assignee: Western Electric Co., Inc.Inventor: Francis J. Fuchs, Jr.
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Patent number: 4365502Abstract: 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: GrantFiled: November 19, 1980Date of Patent: December 28, 1982Assignee: Fort Wayne Wire Die, Inc.Inventor: Charles Carson
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Patent number: 4350865Abstract: 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: GrantFiled: November 21, 1980Date of Patent: September 21, 1982Assignee: Ford Motor CompanyInventor: Benjamin I. Bachrach
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Patent number: 4333986Abstract: 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: GrantFiled: June 10, 1980Date of Patent: June 8, 1982Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kazuo Tsuji, Shuji Yazu, Akio Hara
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Patent number: 4308044Abstract: 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: GrantFiled: April 4, 1980Date of Patent: December 29, 1981Assignee: Hughes Aircraft CompanyInventor: Jon H. Myer
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Patent number: 4287749Abstract: 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: GrantFiled: November 15, 1979Date of Patent: September 8, 1981Assignee: Ford Motor CompanyInventors: Benjamin I. Bachrach, William J. Fuhrman
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Patent number: 4270373Abstract: 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: GrantFiled: May 30, 1979Date of Patent: June 2, 1981Inventors: Motoshiro Hirato, Hazime Kawagoe, Kazuo Abe, Tsuyoshi Sato, Yasuhiko Miyake, Masahiro Nagai, Katsuhisa Furuichi, Kiyoshi Shimojima
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Patent number: 4270380Abstract: 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: GrantFiled: May 25, 1979Date of Patent: June 2, 1981Assignee: Corning Glass WorksInventors: Suresh T. Gulati, Henry E. Hagy
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Patent number: 4260397Abstract: 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: GrantFiled: August 23, 1979Date of Patent: April 7, 1981Assignee: General Electric CompanyInventor: Harold P. Bovenkerk
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Patent number: 4254652Abstract: 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: GrantFiled: June 4, 1979Date of Patent: March 10, 1981Assignee: National Can CorporationInventor: Harry P. Proctor
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Patent number: 4241625Abstract: 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: GrantFiled: March 8, 1979Date of Patent: December 30, 1980Assignee: Fort Wayne Wire Die, Inc.Inventors: Lawrence W. Corbin, Charles Carson
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Patent number: 4232541Abstract: 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: GrantFiled: January 23, 1979Date of Patent: November 11, 1980Assignee: The Babcock & Wilcox CompanyInventor: Paul E. Stump
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Patent number: 4228673Abstract: 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: GrantFiled: October 6, 1978Date of Patent: October 21, 1980Assignee: Carmet CompanyInventor: Frank R. Scheel
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Patent number: 4211104Abstract: 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: GrantFiled: March 14, 1979Date of Patent: July 8, 1980Assignee: Barnabo Steel CorporationInventors: Robert E. Barnabo, Karl J. Hyslop
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Patent number: 4187711Abstract: 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: GrantFiled: July 24, 1978Date of Patent: February 12, 1980Assignee: Wakefield Engineering, Inc.Inventors: Ronald B. Lavochkin, Thomas D. Coe
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Patent number: 4186825Abstract: 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: GrantFiled: August 14, 1978Date of Patent: February 5, 1980Assignee: Goodyear Aerospace CorporationInventor: Paul E. Milliken
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Patent number: 4179909Abstract: 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: GrantFiled: April 26, 1978Date of Patent: December 25, 1979Assignee: National Can CorporationInventor: Edward G. Maeder
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Patent number: 4169366Abstract: 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: GrantFiled: December 6, 1976Date of Patent: October 2, 1979Assignee: Swiss Aluminium Ltd.Inventor: Adolf Ames
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Patent number: 4157654Abstract: 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: GrantFiled: January 3, 1978Date of Patent: June 12, 1979Assignee: The Babcock & Wilcox CompanyInventors: Kurt J. Kahlow, Richard L. Holbrook
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Patent number: 4157024Abstract: A method and apparatus of forming a tube by pushing it through a die to form high quality tubular fittings.Type: GrantFiled: January 3, 1978Date of Patent: June 5, 1979Assignee: The Babcock & Wilcox CompanyInventors: Kurt J. Kahlow, Richard L. Holbrook
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Patent number: 4145910Abstract: 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: GrantFiled: June 20, 1977Date of Patent: March 27, 1979Assignee: Carmet CompanyInventor: Frank R. Scheel
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Patent number: 4144739Abstract: 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: GrantFiled: October 13, 1977Date of Patent: March 20, 1979Assignee: Fort Wayne Wire Die, Inc.Inventor: Lawrence W. Corbin
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Patent number: 4137745Abstract: 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: GrantFiled: March 5, 1976Date of Patent: February 6, 1979Inventors: Rustem I. Muratov, Jury D. Kot, Mikhail F. Belov, Melis S. Gildengorn, Vyacheslav S. Konkov, Mikhail I. Erlikh
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Patent number: 4129024Abstract: 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: GrantFiled: November 9, 1977Date of Patent: December 12, 1978Assignee: Aluminum Company of AmericaInventor: Charles H. Deveney
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Patent number: 4129052Abstract: 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: GrantFiled: October 13, 1977Date of Patent: December 12, 1978Assignee: Fort Wayne Wire Die, Inc.Inventor: Paul Bieberich
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Patent number: 4096721Abstract: 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: GrantFiled: April 25, 1977Date of Patent: June 27, 1978Assignee: Western Electric Company, Inc.Inventors: Nazeer Ahmed, Ivan Gerald Histand
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Patent number: 4095449Abstract: 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: GrantFiled: December 30, 1976Date of Patent: June 20, 1978Assignee: The Valeron CorporationInventors: Frank George Roach, Paul Fred Woerner
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Patent number: 4080817Abstract: 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: GrantFiled: March 26, 1976Date of Patent: March 28, 1978Inventor: Maurice Bastide
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Patent number: 4072034Abstract: 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: GrantFiled: July 24, 1975Date of Patent: February 7, 1978Assignee: National Research Development CorporationInventors: Graham R. Dawson, Dennis H. Sansome
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Patent number: 4072037Abstract: 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: GrantFiled: March 14, 1977Date of Patent: February 7, 1978Assignee: Western Electric Co., Inc.Inventor: Francis J. Fuchs, Jr.
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Patent number: 4055073Abstract: 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: GrantFiled: September 16, 1976Date of Patent: October 25, 1977Assignee: Sigma Lutin, narodni podnikInventor: Oldrich Langr
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Patent number: 4051706Abstract: 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: GrantFiled: July 1, 1975Date of Patent: October 4, 1977Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoichi Sakamoto, Nobuyuki Kato, Tadao Ohtani
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Patent number: 4040282Abstract: 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: GrantFiled: November 24, 1975Date of Patent: August 9, 1977Assignee: National Steel CorporationInventor: William T. Saunders
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Patent number: 4038859Abstract: 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: GrantFiled: July 14, 1976Date of Patent: August 2, 1977Assignee: American Can CompanyInventor: John Pavleszek
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Patent number: 4038858Abstract: 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: GrantFiled: May 24, 1976Date of Patent: August 2, 1977Assignee: Rose M. DeZubaInventor: James M. DeZuba
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Patent number: 4036043Abstract: 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: GrantFiled: October 20, 1975Date of Patent: July 19, 1977Assignee: Kobe Steel Ltd.Inventors: Yoshihiro Yamaguchi, Tomiharu Matsushita, Masataka Noguchi, Hideaki Ide, Kunihiko Nishioka
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Patent number: 4027518Abstract: 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: GrantFiled: April 23, 1975Date of Patent: June 7, 1977Inventor: Erich Ribback
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Patent number: 4018075Abstract: 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: GrantFiled: April 30, 1976Date of Patent: April 19, 1977Assignee: Hitachi, Ltd.Inventors: Hiroyuki Kawawa, Yasushi Ohuchi, Hisanobu Kanamaru
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Patent number: 4016736Abstract: 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: GrantFiled: June 25, 1975Date of Patent: April 12, 1977Assignee: General Electric CompanyInventors: Lynn Cloyd Carrison, Robert George Wetzel
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Patent number: 4015459Abstract: 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: GrantFiled: December 31, 1975Date of Patent: April 5, 1977Assignee: Olin CorporationInventors: Joseph Winter, Eugene Shapiro, Warren F. Smith
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Patent number: 3999415Abstract: 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: GrantFiled: December 22, 1975Date of Patent: December 28, 1976Inventor: Alfred Robertson Austen