With Actuation Of Split Die Patents (Class 72/357)
  • Publication number: 20150042072
    Abstract: A die is adapted for forming a cold forged receiver hitch that includes an integral cold forged smooth reinforcing flange at an upper end. The die includes a top plate and a bottom plate spaced apart from the top plate along a plate axis that is perpendicular to the surfaces of the top and bottom plates. The top plate includes two transversely spaced-apart jambs within which the top plate is slidably mounted, an actuation system configured to move the top plate relative to the bottom plate along the plate axis. The bottom plate supports a bottom support plate to which a stationary mandrel is secured and an assembly of two transversely spaced-apart split cams, the split cams being transversely spaced from the stationary mandrel by a distance that is greater than the thickness of the tube out of which the receiver hitch is to be cold forged.
    Type: Application
    Filed: August 11, 2014
    Publication date: February 12, 2015
    Inventor: Kevin Kelly
  • Patent number: 8904844
    Abstract: A method of manufacturing a sprocket segment that is formed by forging as one of a plurality of circumferentially divided parts of a sprocket having a plurality of teeth arranged on an outer peripheral surface of a circular flange, the method includes: forming a material of the sprocket segment into an initial formed state in an initial forming step; and subjecting the sprocket segment in dies to a finish forming process with a tooth trace direction of the sprocket segment as viewed in cross-section of the sprocket segment being inclined relative to a forging direction of the dies in a finish forming step.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: December 9, 2014
    Assignee: Komatsu Ltd.
    Inventors: Fumiaki Kawahara, Tao Wang, Shohei Kusada
  • Publication number: 20140260492
    Abstract: Split pass forging a workpiece to initiate microstructure refinement comprises press forging a metallic material workpiece in a first forging direction one or more times up to a reduction ductility limit of the metallic material to impart a total strain in the first forging direction sufficient to initiate microstructure refinement; rotating the workpiece; open die press forging the workpiece in a second forging direction one or more times up to the reduction ductility limit to impart a total strain in the second forging direction to initiate microstructure refinement; and repeating rotating and open die press forging in a third and, optionally, one or more additional directions until a total amount of strain to initiate microstructure refinement is imparted in an entire volume of the workpiece.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: ATI PROPERTIES, INC.
    Inventors: Jean-Phillippe A. Thomas, Ramesh S. Minisandram, Jason P. Floder, George J. Smith, JR.
  • Patent number: 8813533
    Abstract: A set of tooling for a progressive forming machine comprising die and tool units having internal complementary cavity portions for receiving a workpiece, one of said units being arranged to slide a limited distance along its axis and to be biased by a spring force towards the other unit when the units are mounted in the forming machine, the units each having an end face with a smooth surface finish adapted to press against the smooth surface finish of the end face of the other unit, the end face area of one of the units being relatively small compared to its major cross-sectional area whereby a high contact pressure between the end faces is obtained for a given spring bias force such that extrusion/cooling oil coating a workpiece received in the cavity portions is restrained from leakage from the cavity portions across said end faces during a hydrostatic trapped extrusion of the workpiece in the die and tool units whereby the die and tool units are capable of shaping the workpiece to a degree beyond limits of
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: August 26, 2014
    Assignee: National Machinery LLC
    Inventors: Donald E. Krintzline, Thomas E. Hay
  • Publication number: 20140144199
    Abstract: Provided are: a closed-die forging method capable of preventing a temperature decrease in a to-be-forged member during forging, easy temperature monitoring during forging, and causing cavity end portions of a die to be filled with the to-be-forged member; and a method of manufacturing a forged article using the closed-die forging method. The closed-die forging method, which involves placing a heated to-be-forged member on a lower die and hammer-forging the to-be-forged member with a reciprocating upper die, includes covering the whole of a portion of the to-be-forged member that contacts the lower die with a metal heat-insulation member prior to forging, except for at least a part of a portion that contacts an upper die during forging, and then forging the to-be-forged member integrally with the metal heat-insulation member. Preferably, the to-be-forged member is a superalloy and the metal heat-insulation member is stainless steel. Further preferably, the to-be-forged member is forged into a disk shape.
    Type: Application
    Filed: December 26, 2011
    Publication date: May 29, 2014
    Applicant: HITACHI METALS, LTD.
    Inventors: Yusuke Shigihara, Koji Sato
  • Patent number: 8601850
    Abstract: Any of various features of a workpiece are forged by a common set of tools. The feature is incrementally forged as the tool set is moved to successive forging locations on the surface of the workpiece. One of the tools is used to plasticize and extrude a portion of the workpiece while one or more of the other tools are used to form dams that contain and shape the extruded portions.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: December 10, 2013
    Assignee: The Boeing Company
    Inventors: Kevin T. Slattery, James B. Castle, Christopher S. Huskamp
  • Patent number: 8382601
    Abstract: A method of manufacturing fastenings or fasteners with radial outer contours, especially screws or threaded bolts, made of solid metal is performed by a device. The method manufactures the fastenings or fasteners preferably on a multi-stage press. Several recesses running in an axial direction at a fixed radial distance are formed in the shank-shaped section of a blank. The prefabricated blank with the recesses is inserted into a multi-part split mold within a multi-stage press, whose die stocks have an inner profiling forming the outer contour, and are opened in the starting position, that at the places where the die stocks are opened, there are the recesses. During the closing movement of the die stocks, at least one radial outer contour is pressed on the shank-shaped section of the blank by radial action of forces, with the recesses preventing material from getting between the die stocks during the pressing process.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: February 26, 2013
    Assignee: Sieber Forming Solutions GmbH
    Inventor: Hilmar Gensert
  • Publication number: 20130042662
    Abstract: A die apparatus for forging a steering rack having a toothed portion and an array of gear teeth. The die apparatus comprising first and second assemblies movable towards each other. The first assembly comprising a first bolster and a tooth die. The second assembly comprising a second bolster, first and second side dies, a centre punch, and a third bolster. The third bolster being disposed between the first and second bolsters and being movable relative to the second bolster. The first and second side dies being supported by the third bolster, and the centre punch being supported by the second bolster. As the die apparatus closes, the third bolster abuts the first assembly to form a closed forging cavity and then, as the die apparatus continues to close, the centre punch penetrates the closed forging cavity to complete the forging of the steering rack.
    Type: Application
    Filed: April 29, 2011
    Publication date: February 21, 2013
    Applicant: BISHOP STEERING TECHNOLOGY PTY LTD
    Inventor: Wayne Bruce Cornish
  • Patent number: 8256260
    Abstract: A forging method including extruding a billet to form a ring shaped hollow workpiece; reducing a cross section of the workpiece; and forging the workpiece in a closed die having a first split die including a plurality of first die segments and a second split die including a plurality of second die segments by sequentially advancing pairs of opposing die segments from the first split die and second split die towards each other.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: September 4, 2012
    Assignee: General Electric Company
    Inventors: Manu Mathai, Raymond Stonitsch, Guven Yucesan
  • Publication number: 20120165949
    Abstract: An orthopedic implant and method for forming same includes providing a forging die having a punch and a split die. The split die is movable between an opened state, where first and second die portions are spaced apart to allow for removal of a formed orthopedic implant element from within the cavity portions, and a closed state, where the first and second die portions are secured together and the cavity portions cooperate to define a cavity to form the orthopedic implant element therein. The split die is closed and a billet of biocompatible material is provided in the cavity and the punch is moved to deform the billet in the cavity to forge the orthopedic implant element in the cavity while the first and second die portions are substantially fixedly secured together when the split die is in said closed state.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 28, 2012
    Applicant: ORCHID ORTHOPEDICS SOLUTIONS
    Inventor: Steven L. Worthington
  • Patent number: 8099851
    Abstract: A crimping system for crimping a stent onto a catheter balloon includes at least one crimping head of moveable contracting members, which define a diameter reduction chamber. The chamber has a length and a longitudinal axis. The chamber has a reduced diameter configuration and a pre-reduction diameter configuration. Each member has a length corresponding to the length of the chamber. In both the reduced diameter configuration and the pre-reduction diameter configuration each member is a given distance from the longitudinal axis, wherein a first region of the length of each member is a greater distance from the longitudinal axis than a second region of the length of each member.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: January 24, 2012
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Tina Roach, Jon Livingston, Beccie McCarville
  • Patent number: 7992420
    Abstract: A brake caliper for a disk brake, in particular for motorcycles and/or bicycles, includes a housing (30) in which a disk space (39) for receiving a brake disk and a brake cylinder (35) for receiving a brake piston (25) are formed. The brake cylinder (35) is connected to the disk space (39) and has, on its side opposite to the disk space (39), an assembly opening (50) through which the brake piston (25) can be inserted into the brake cylinder (35). A closure element (10) closes the assembly opening (50) after the insertion of the brake piston (25) into the brake cylinder (35). A securing element (21) secures the closure element (10) in the assembly opening (50) against forces in the direction of the main axis of the brake cylinder (35).
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: August 9, 2011
    Assignee: Gustav Magenwirth GmbH & Co. KG
    Inventor: Michael Ruopp
  • Publication number: 20110113850
    Abstract: A forging method including extruding a billet to form a ring shaped hollow workpiece; reducing a cross section of the workpiece; and forging the workpiece in a closed die having a first split die including a plurality of first die segments and a second split die including a plurality of second die segments by sequentially advancing pairs of opposing die segments from the first split die and second split die towards each other.
    Type: Application
    Filed: January 31, 2011
    Publication date: May 19, 2011
    Applicant: General Electric Company
    Inventors: Manu Mathai, Raymond Stonitsch, Guven Yucesan
  • Publication number: 20110067477
    Abstract: A die apparatus and method for performing a flashless forging operation to manufacture the toothed portion of a steering rack. The die apparatus includes first and second die members and at least one punch member, each having a forming surface shaped substantially as an obverse of a portion of the toothed portion. At least a portion of the forming surface of the first die member is shaped substantially as the obverse of the teeth of the rack. The first and second die members are moveable towards each other to a closed position, thereby partially forging the toothed portion from a blank placed in the die apparatus, and forming a substantially closed cavity defined by the forming surfaces. The punch member is adapted to move into the cavity once the die members are in the closed position, thereby completing the forging operation.
    Type: Application
    Filed: November 30, 2010
    Publication date: March 24, 2011
    Inventors: Juergen DOHMANN, Johann Friederich Jaeggi, Lyle John McLean
  • Patent number: 7895874
    Abstract: A method of forging a workpiece includes (a) incrementally advancing the workpiece in a closed die forge, the closed die forge including a stationary, flat die and a first split die including a plurality of first die segments, each die segment being incrementally advanced in sequence to contact the incrementally advancing workpiece; (b) replacing the stationary, flat die with a second split die including a plurality of second die segments; and (c) forging the workpiece forged in (a) between the first split die and the second split die, wherein the first die segments are stationary and at least some of the plurality of second die segments are incrementally advanced in sequence.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: March 1, 2011
    Assignee: General Electric Company
    Inventors: Manu Mathai, Raymond Stonitsch, Guven Yucesan
  • Patent number: 7861570
    Abstract: The present invention provides a method of forming a drug eluting stent, the method comprising coupling a stent framework to a mandrel, inserting the mandrel with stent framework into an open die, the die including a forming surface including a plurality of raised indentation forming portions; closing the die against the stent framework; pressing the raised indentation portions into the stent framework to form indentation in the stent framework; and inserting at least one drug polymer into the indentation formed in the stent framework.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: January 4, 2011
    Assignee: Medtronic Vascular, Inc.
    Inventor: Richard Thomas
  • Publication number: 20100326235
    Abstract: An apparatus (30) for metal forging a crankshaft (100) having a plurality of throws (6, 7, 8, 9) having parallel axes (31, 32, 33, 34) comprises an upper die (40) and a lower die (50) each having cavities defining a negative shape of a corresponding half of the crankshaft (100). The two dies (40, 50) have mating surfaces (62, 63, 64, 65) lying on different parallel planes. A metal forged crankshaft (100) forged by such apparatus (30) comprises a plurality of throws (6, 7, 8, 9) having parallel throw axes (31, 32, 33, 34) lying in a same plane of symmetry (41) and split-lines (17, 18, 19, 20) from the forging process lying in planes (42, 43) substantially orthogonal to said plane of symmetry (41).
    Type: Application
    Filed: February 29, 2008
    Publication date: December 30, 2010
    Applicant: PERKINS ENGINES COMPANY LIMITED
    Inventor: Adam D. Kilbon
  • Patent number: 7574797
    Abstract: A throttle body for an automobile includes a throttle shaft defining a rotational axis. The throttle shaft includes deformable members integrally formed about an exterior surface of the throttle shaft. A housing includes a bore. The throttle shaft extends through the bore with the deformable member partially-located within the bore. A bearing includes an inner surface and an outer surface. The bearing inner surface forms a press-fit connection with the deformable members to substantially prevent movement between the throttle shaft and the bearing in a direction parallel to the rotational axis.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: August 18, 2009
    Assignee: Ford Global Technologies, LLC
    Inventors: James Rauch, Richard Tyzo
  • Publication number: 20090173132
    Abstract: A method of forging a workpiece includes (a) incrementally advancing the workpiece in a closed die forge, the closed die forge comprising a stationary, flat die and a first split die comprising a plurality of first die segments, each die segment being incrementally advanced in sequence to contact the incrementally advancing workpiece; (b) replacing the stationary, flat die with a second split die comprising a plurality of second die segments; and (c) forging the workpiece forged in (a) between the first split die and the second split die, wherein the first die segments are stationary and at least some of the plurality of second die segments are incrementally advanced in sequence. Another forging method includes extruding a billet to form a ring shaped hollow workpiece; reducing a cross section of the workpiece; and forging the workpiece in a closed die comprising a first split die comprising a plurality of first die segments and a second split die comprising a plurality of second die segments.
    Type: Application
    Filed: January 3, 2008
    Publication date: July 9, 2009
    Applicant: General Electric Company
    Inventors: Manu Mathai, Raymond Stonitsch, Guven Yucesan
  • Patent number: 7055237
    Abstract: The present invention provides a method of forming a drug eluting stent, the method comprising coupling a stent framework to a mandrel, inserting the mandrel with stent framework into an open die, the die including a forming surface including a plurality of raised indention forming portions; closing the die against the stent framework; pressing the raised indention portions into the stent framework to form indentions in the stent framework; and inserting at least one drug polymer into the indentions formed in the stent framework.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: June 6, 2006
    Assignee: Medtronic Vascular, Inc.
    Inventor: Richard Thomas
  • Patent number: 7055359
    Abstract: A method for forging/molding a coarse blank of an oil cylinder, including steps of: placing burn-in softened aluminum material into a preheated mold; using a first punch head to first forge the aluminum material in the mold cavity from outer side of the molding hole so as to form a blank body of the oil cylinder with a first end cap, a second end cap and a shorter cylinder body; moving out the first punch head and connecting an extension mold with the mold; and immediately using a second punch head to secondarily forge the blank body in the mold cavity from outer side of the extension hole and making the end section of the second punch head extend into the mold cavity to a position near the inner end of the mold cavity, whereby the cylinder body of the blank body outward axially extends to the extension mold into a predetermined length so as to form the oil cylinder.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: June 6, 2006
    Assignee: Jinn Ruey Industries Co., Ltd.
    Inventor: Chang Fa Liu
  • Patent number: 7007537
    Abstract: A work piece has an interior cylindrical component. The interior cylindrical component is composed of a beam. The beam is adapted to apply pressure to remove the work piece. An intermediate cylindrical component has four radial spaced cylindrical control arms, an interior flange and an exterior pair of semi-conical molding adapted to receive a work piece. An exterior cylinder housing is adapted to house the interior component and the intermediate component. The exterior cylinder housing has a plurality of bores and a conical recess. The conical recess is adapted to receive the molding arms of the intermediate cylindrical component.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: March 7, 2006
    Assignee: Omni-Lite Industries International, Inc.
    Inventors: Richard Brown, Michael Kenneth Walker
  • Patent number: 6626021
    Abstract: An oil pan includes an oil reservoir and a pair of side walls facing the reservoir. A bulge is formed in each side wall. Each bulge defines an oil sub chamber connected to the oil reservoir. The bulges are formed integrally with the side walls by deforming the side walls outward. In other words, the bulges are not fastened to the side wall but are part of it. The oil pan is therefore easily and inexpensively formed by pressing. Further, since there is no joint between each bulge and the side wall, the oil pan has improved strength and durability.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: September 30, 2003
    Assignee: Pacific Industrial Co., Ltd.
    Inventors: Tsutomu Okuda, Koji Tsuiki, Manabu Hayano
  • Patent number: 6581432
    Abstract: A device for upsetting a workpiece has a frame, a head for movement in a first direction toward the frame, and first and second tool holders between the frame and the head for holding dies for the upsetting. A parallelogram linkage mechanism supports the first tool holder on one of the frame and head for movement by the movement of the head in the first direction and in a second direction perpendicular to the first direction and toward the second tool holder for the upsetting. The parallelogram linkage mechanism has first and second pins respectively on the first tool holder and the one of the frame and head, and a link rotatably on the pins, one of the pins being eccentric in the second direction.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: June 24, 2003
    Assignee: Instytut Obrobki Plastycznej
    Inventor: Tadeusz Rut
  • Patent number: 6485371
    Abstract: A grooved nut including a cylindrical shaft portion having a screw hole at the center, a head portion whose outer periphery is polygonal and which is provided at one end portion of the shaft portion, and a peripheral groove provided at a boundary part between the head portion and the shaft portion, in which the peripheral groove is formed by a plasticizing process.
    Type: Grant
    Filed: January 3, 2001
    Date of Patent: November 26, 2002
    Assignee: Kabushiki Kaisha Sakamura Kikai Seisakusho
    Inventors: Yoshikazu Sakamura, Fumio Kamiyama
  • Patent number: 6477883
    Abstract: A die block apparatus for shaping workpieces by way of die stamping includes a die block (40), a first sliding block (10), a second sliding block (30), and a stopper block (50). The die block is dimensioned to receive the first and second sliding blocks and the stopper block. The first sliding block includes a body (11), a pair of inclined rails (16) extending from opposite lateral sides of the body, and a protrusion (17) extending outwardly from the body. The body has a vertical inner surface (12). A groove (14) is defined in the inner surface. The protrusion has a vertical outer surface (18). The second sliding block is a mirror image of the first sliding block. The stopper block includes a base (54) and a vertical beam (52). The stopper block has a vertical contact surface (56), for abutting the outer surface of the first sliding block.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: November 12, 2002
    Assignee: Hon Hai Precision Ind. Co., Ltd.
    Inventor: Yao-Tser Liu
  • Patent number: 6427302
    Abstract: A forming die includes a base and at least two die segments. At least a first one of the die segments is moveably mounted to the base for shifting between closed and opened positions. The die segments together define a cavity having an opening when the first die segment is in the closed position. A punch is moveably mounted to the base for shifting between a retracted position and an extended position wherein the punch crimps a part positioned within the cavity. A powered actuator is connected to at least the first one of the die segments, and shifts the first die segment between the closed and opened positions such that a part positioned within the cavity can be removed after crimping by shifting of the first die segment to the open position. The forming die is particularly well-suited for crimping electrochemical cells.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: August 6, 2002
    Assignee: Eveready Battery Company, Inc.
    Inventors: Raymond W. Piantoni, Robert E. Ray, Jr.
  • Patent number: 6397652
    Abstract: A tool body is cold formed by inserting a blank into a die which defines a portion of the outer surface of the tool body after which a punch applies an impact to the blank causing the outer surface of the blank to conform to the contour defined by the die. The tool body has a tapered forward end, a central radial flange and a rearward cylindrical shank. To cold forge a fixed diameter in the central flange of the tool the forging die has a cylindrical portion having an inner diameter equal to the desired diameter of the flange, the die having an end to allow overfill to be released forward of the fixed diameter portion. Also, a shoulder is formed between the cylindrical shank and a frustoconical portion between the shank and rear surface of the flange. Finally, the shank has an elongate cylindrical hub to facilitate alignment of the tool.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: June 4, 2002
    Assignee: The Sollami Company
    Inventor: Phillip A. Sollami
  • Patent number: 6370933
    Abstract: A die for reducing the formation of flash on parts includes a first die section and a second die section defining therein a cavity. The first die section includes a pair of first surfaces and the second die section includes a pair of second surfaces which together define a pair of parting lines which extend from opposite sides of the cavity. Desirably, the first die section includes a pair of lands, each extending along the length of one of the parting lines. Each land defines a first surface portion of the first surface and is sized and configured so that the land is elastically loaded, e.g., substantially equal to and less than the elastic limit of the material forming land when forming a part.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: April 16, 2002
    Assignee: General Electric Company
    Inventors: Arne Ronald Majorell, David Peter Mika, Alain Girard, Apostolos Pavlos Karafillis
  • Patent number: 6256853
    Abstract: A forming die includes a base and at least two die segments. At least a first one of the die segments is moveably mounted to the base for shifting between closed and opened positions. The die segments together define a cavity having an opening when the first die segment is in the closed position. A punch is moveably mounted to the base for shifting between a retracted position and an extended position wherein the punch crimps a part positioned within the cavity. A powered actuator is connected to at least the first one of the die segments, and shifts the first die segment between the closed and opened positions such that a part positioned within the cavity can be removed after crimping by shifting of the first die segment to the open position. The forming die is particularly well-suited for crimping electrochemical cells.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: July 10, 2001
    Assignee: Eveready Battery Company, Inc.
    Inventors: Raymond W. Piantoni, Robert E. Ray, Jr.
  • Patent number: 5946966
    Abstract: A upset forging machine assembly (20) including a pair of gripper dies (22, 24) for gripping forging stock in a closed position and movable to an open position for receiving stock and removing a forged part. A gripper drive mechanism (34) moves the gripper dies (22, 24) between the open and closed positions. A header (84) is removably clamped to a header support member (36) by multiple pairs of studs (72) extending from the header support member (36) with each stud (72) having a head (78) disposed in an associated channel (90) in the header (84). An actuation mechanism (92, 94) moves the studs (72) between a clamped position and a release position. A tool punch (142) is supported by the header (84) for upsetting the forging stock. Having the header (84) clamped to the header support member (36), a header drive mechanism (46) moves the header support member (36) to a forging position is when the gripper dies (22, 24) are in the closed position.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: September 7, 1999
    Assignee: Tool Dex, Inc.
    Inventor: Tony Madaffer
  • Patent number: 5813272
    Abstract: The invention provides an apparatus for full enclosed die forging having a stationary die, a movable die toward and away from the stationary die and punches which plunge into a work in the closed dies to form tools. After the stationary die in the die housing and the movable die on the ram are closed, the closed pair of dies is moved in a forging direction into the inside of the die housing. In the die housing is equipped an annular engaging member which is movable in the forging direction and shrinkable toward the closed pair of dies in the die housing. The annular engaging member is thrusted into the inside of the die housing along with the closed pair of dies by thrusting means. Shrinking means is provided for shrinking the annular engaging member toward the closed pair of dies in the die housing as the annular engaging member is thrusted into the die housing so that the annular engaging member engages with the closed pair of dies and clamp them tightly.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: September 29, 1998
    Assignee: Kabushiki Kaisha Sakamura Kikai Seisakusho
    Inventor: Kazuhiko Gomi
  • Patent number: 5642640
    Abstract: A method for forming ports on a heat exchanger manifold, in which risers are back extruded in a single operation from the surrounding material of the manifold such that subsequent machining steps to further define and finish the port are unnecessary. The method of this invention generally includes forging the manifold between a pair of die halves so as to back extrude a localized portion of the manifold into a riser cavity in one of the die halves. Afterwards, and while the manifold remains within the die cavity, a punch is forced through the riser cavity and into the extruded portion in a direction toward the manifold so as to further back extrude the extruded portion. This step causes the raised portion to flow in a direction opposite to the direction of the punch, producing a riser having an internal bore defined by the punch and an outer surface defined by the cavity.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: July 1, 1997
    Assignee: Norsk Hydro A. S.
    Inventors: Jeffrey Lee Insalaco, William Marv Johnson, David Michael Halbig
  • Patent number: 5606887
    Abstract: A method and apparatus to cold form an L-shaped lead battery terminal. The apparatus includes a forming station for cold forming an L-shaped lead battery terminal having a tower offset from the head. The forming station includes a split die for forming a head having a radial ring. The apparatus also includes a punching station for forming a continuous through hole in the head and a recess in the tower. Another method and apparatus to cold form an L-shaped lead battery terminal includes a forming station, punching station and a rolling station for forming a ring on the terminal. The forming station includes a unitary die to form a head having a uniform diameter and a tower offset from the head. The rolling station includes a fixture, a rolling head having a plurality of rollers, and a drive system for engaging and rotating the rolling head and lead battery terminal relative to each other.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: March 4, 1997
    Assignee: Tulip Corporation
    Inventors: Bernard N. Spiegelberg, Mark E. Sauter
  • Patent number: 5575172
    Abstract: A device for producing a hollow body according to an internal high pressure metal forming process has a tool which is divided along a mold joint into a stationary tool part and a liftable tool part. The tool has an impression for receiving a tube-shaped blank. A press opens and closes the tool. An axially movable slide is attached to an open end of the blank, through which a pressure medium is introduced into the blank. A hydraulic working cylinder which is angularly and vertically adjustable on a support member has a piston rod which holds the slide and which displaces the slide axially. A pair of pull rods connect the tool and the working cylinder and are arranged on opposite sides of the piston rod at the same level as the piston rod, each pull rod extending into the end-side portion of the mold joint and being releasably anchored to each of the stationary tool part and the liftable tool part in a form-locking manner in corresponding recesses along the mold joint.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: November 19, 1996
    Assignee: Mercedes-Benz
    Inventors: Pierre Bonny, Thoralf Nehls
  • Patent number: 5547424
    Abstract: In a method of making an elongate object (49) with a head at one end and a point at the other end, a blank (49) is placed in a die (50) having a through-going channel, following which the head end is subjected to axial pressure by a tool (52), while a stop member (55) is kept engaged with the die (50) at its other end. A pre-formed head is initially provided on the blank (49) so that the head has an excess of material with respect to the size of the final head. A cavity (56) is formed in the stop member and is in extension of the through channel. When blank (49) is subjected to axial pressure the tool (52) causes flow of material in the shank of the blank (49) so that blank material flows into the cavity (56) of the stop member.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: August 20, 1996
    Assignee: Enkotec A/S
    Inventor: Ove Nielsen
  • Patent number: 5493888
    Abstract: Precision forming apparatus is disclosed. The apparatus comprises a die with a cavity which conforms with the shape of a portion of a part to be formed, a punch with a cavity which conforms with the shape of another portion of the part to be formed, and means for causing relative movement of the die and the punch between(a) a first (closed) position in which the die and the punch nearly abut one another and the two cavities are aligned and form a single cavity which conforms with the shape of the part to be formed, andb) a second (open) position in which the die and the punch are separated from one another and a billet can be placed in the cavity of one to be formed, when the two are returned to the first position, to the shape of the single cavity.The cavity forms longitudinally opposed end walls in their entirety. As a consequence, the length of a part to be formed is determined by the punch cavity, and can be changed by substituting a different punch.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: February 27, 1996
    Assignee: Aeroquip Corporation
    Inventors: Kenneth L. Merkle, Dennis J. Stuerzenberger, Rick Cotterman, Scott A. Etzler
  • Patent number: 5425170
    Abstract: A cold formed side wall terminal for a storage battery, the terminal being formed from a lead slug having a cavity at one end, a stainless steel nut positioned in the cavity and encapsulated therein on cold working the lead slug, the terminal further including a spline ring at the other end and a number of seal rings formed on the outside of the terminal intermediate the ends thereof.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: June 20, 1995
    Assignee: Tulip Corporation
    Inventors: Bernard N. Spiegelberg, Mark E. Sauter
  • Patent number: 5419791
    Abstract: This is a method for heat assisted forming, annealing, and hardening 360.degree. sheet metal shapes in a clean environment in a single facility that results in dimensionally correct, cost-effective, contaminant free parts.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: May 30, 1995
    Inventor: Carroll W. Folmer
  • Patent number: 5365765
    Abstract: A punch press assembly (20) simultaneously upsets two ends (22) of a cylindrical blank (24) to produce a chain pin (34) having an extruded grain structure (134) which extends parallel to its longitudinal axis (B) into the upset regions of the chain pin (34). The punch press (20) clamps an upper die (30) to a lower die (26) via a mechanical crank (45), attached to the upper die (30) with lost motion (80,82). While maintaining the clamping relationship between the upper (30) and lower (26) dies, the downwardly directed force created by the mechanical crank (45) is transferred to the horizontal punches (36) by the two pairs of wedges (58,60). The two lower wedges (60) slide horizontally along two tie rods (84) and force the two punches (36) into the recess (28) to upset the ends of the cylindrical blank (24) to form a chain pin (34).
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: November 22, 1994
    Inventors: Allen P. Gohl, Edmund W. Gohl
  • Patent number: 5349840
    Abstract: A battery terminal with high torque resistance utilizing three sided frusto-conical recesses and mating protrusions extending from the battery terminal and method of making the terminal by a cold forming process that forms a finished battery terminal from a preworked lead slug by driving one end of a punch through the slug to remove excess material and form an axial through hole, a second and third portion of the punch to close the die chamber and a fourth portion of the punch to radially expand the lead slug into a finished battery terminal. The dies for forming the battery terminal include a movable multiple-segmented die for collapsing radially inward around the slug and a frusto-conical die for forming the top portion of the battery terminal. An ejector sleeve removes the finished battery terminal after the cold forming process.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: September 27, 1994
    Assignee: Water Gremlin Company
    Inventors: Robert W. Ratte, Ronald Cain, Norman E. Peterson
  • Patent number: 5237850
    Abstract: A method of reducing the end portion of a pipe to a smaller diameter of exact and smooth dimensions for fitting therein a roller contact bearing comprises the steps of; inserting into the end to be reduced a mandrel of an outside diameter coextensive with that of the bearing to be inserted and of a length coextensive with the predesignated length of the reduced portion; placing the pipe together with the inserted mandrel into a split die having a first portion of a length coextensive with that of the predesignated reduced length of the pipe and of an inner diameter coextensive with the predesignated outer diameter of the pipe, and a second portion of a diameter at least coextensive with the original diameter of the pipe; and placing the die and the pipe into a press for compressing the pipe end by means of the die and the mandrel.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: August 24, 1993
    Inventor: Giora Goldman
  • Patent number: 5218853
    Abstract: An apertured part is pressed in a single cycle with no separate slug shearing operation. The press ram and bolster each contain fixed aperture forming punches which extend coaxially and slidably through piston like die supports, each of which is backed by a hydraulic fluid chamber. Separate systems control the fluid pressure in the two chambers so as to cause the dies supports to slide in one direction relative to the punches initially, then quickly in the other direction to shear the slug formed between the ends of the punches away from the part. The ram chamber is maintained at a high pressure throughout the first half of the stroke, while the bolster chamber begins at a low pressure and is allowed to rise to a higher, intermediate pressure that is still lower than the bolster chamber. Thus, the ram die support pushes the bolster die support down. However, when the pressure differential is removed, the two die supports quickly move up together over the fixed punches, shearing the slug out of the part.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: June 15, 1993
    Assignee: General Motors Corporation
    Inventors: William A. Mueller, Ranny J. Nunley
  • Patent number: 5211046
    Abstract: An apparatus of and a method for forming a multistage hollow pipe comprising the steps of arranging a hollow pipe on a plurality of molds composed of an upper mold, first, second, third forming molds for subjecting the hollow pipe to drawing process, axially applying a compressive force, which is greater than the force forming multistage bulges on the hollow pipe, to the hollow pipe for forming the multistage hollow pipe, removing the processed multistage hollow pipe and other molds from the first forming mold, releasing the clamping of the processed multistage hollow pipe by the second and the third forming molds, and taking out the processed multistage hollow pipe.
    Type: Grant
    Filed: May 7, 1991
    Date of Patent: May 18, 1993
    Assignee: Kyosan Denki Kabushiki Kaisha
    Inventor: Masayuki Inagaki
  • Patent number: 5140735
    Abstract: An improved die member and method of attaching a self-piercing and riveting fastener to a panel wherein a slug pierced from the panel by the riveting fastener is securely staked in the tubular riveting portion of the fastener during the installation of the fastener. The staking method includes shearing integral ribbons from the inside surface of the tubular barrel portion as the barrel portion is deformed radially outwardly in an annular die cavity of the die member. The integral ribbons are then preferably deformed radially inwardly in semicircular staking cavities defined through the free end of the central die post. In the most preferred method, radial tabs are simultaneously formed in the panel slug, which are deformed against an inside surface of the barrel portion, securely staking the slug in the tubular barrel portion and preventing inadvertent removal of the slug.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: August 25, 1992
    Assignee: Multifastener Corporation
    Inventor: Harold A. Ladouceur
  • Patent number: 5090611
    Abstract: An improved method of making a cross joint between different size pipes is provided. A punch, die and a pressing machine are prepared. The punch includes a center rest for receiving a small pipe, a curved slot and a curved surface for transforming an end of the small pipe. Under the actuation of the pressing machine, the end of the small pipe is transformed into an arcuate configuration which is identical with the inside curvature of a large pipe. Simultaneously, a curved bead is formed on the small pipe remaining circumferentially equal distances from the resultant arcuate edge of the small pipe. This distance is substantially the same as the wall thickness of the large pipe. Utilizing the arcuate edge and the curved bead, the small pipe and the large pipe are welded or brazed together, resulting in a cross joint having no protrusion into the large pipe space.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: February 25, 1992
    Assignee: Usui Kokusai Sangyo Kaisha Ltd.
    Inventors: Kazunori Takikawa, Kazumi Fukaya, Jun Ohbu, Yasushi Yagi
  • Patent number: 5088399
    Abstract: Pressing apparatus comprising a die made up of a number of segments defining a cavity in which metal swarf is compacted to form a billet. The die segments are held together by one or more sleeves housed in a housing which is mounted on a pedestal which pivots between a first position in which the cavity is aligned with one or more rams which are advanced into the cavity to compact the swarf, and a second position in which the cavity is aligned with gripping devices which grip the ends of the die segments and separate them radially to release the billet after a jacking device mounted on the housing is actuated to move the sleeves in the axial direction and release the die segments. One of the gripping devices may comprise a cylindrical bore through which an empty tube can be fed into the cavity and the other gripping device may similarly comprise a cylindrical bore through which the billet can be fed after it has been ejected from the die cavity.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: February 18, 1992
    Assignee: Camborne Industries PLC
    Inventors: Antonino G. Cacace, Robert Madeley
  • Patent number: 4910990
    Abstract: A billet (10) is pressed with a first blocking punch (36, 38). Thereafter, the billet is rotated approximately 90.degree.. A second punch (50) is pressed against the billet while a split ring die assembly (58) substantially surrounds the billet and constrains outward flow of the steel. The split ring die assembly includes projecting regions (64, 66) matingly received in recesses (14, 16) created by the first blocking punch. A finishing punch (90, 92) is pressed through the billet to complete formation of openings (94, 96). Preferably, a trimmer (100) removes any flashing from the finished billet.
    Type: Grant
    Filed: April 4, 1989
    Date of Patent: March 27, 1990
    Inventor: Ralph D. Delio
  • Patent number: 4848129
    Abstract: A billet (10) is pressed with a first blocking punch (36, 38). Thereafter, the billet is rotated approximately 90.degree.. A second punch (50) is pressed against the billet while a split ring die assembly (58) substantially surrounds the billet and constrains outward flow of the steel. The split ring die assembly includes projecting regions (64, 66) matingly received in recesses (14, 16) created by the first blocking punch. A finishing punch (90, 92) is pressed through the billet to complete formation of openings (94, 96). Preferably, a trimmer (100) removes any flashing from the finished billet.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: July 18, 1989
    Inventor: Ralph D. Delio
  • Patent number: 4838062
    Abstract: Process and apparatus for upset forging a long stand of solid malleable metal bar stock in a single pass is capable of gathering a large volume of the bar stock into a complex shaped element. The end of the bar stock is selectively heated to provide an intermediate section thereof to a desired upper forging temperature and an end section thereof at a desired lower forging temperature. The heated bar stock is positioned in an upset forging die cavity. A forging punch enters the cavity to upset the long stand to fill the cavity firstly with the upset intermediate section and then the remainder of the cavity with the end section which is at a lower forging temperature. A friction reducing material is provided in the cavity to provide for sliding of the end section along the cavity while the end seciton upsets and gathers the intermediate section of the bar in the major portion of the upset cavity section.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: June 13, 1989
    Assignee: Stelco Inc.
    Inventor: Otto E. Prenn