With Tools Converging To Form Annular Surface; E.g., Segments Of Closed Die Patents (Class 72/354.2)
  • Patent number: 9782823
    Abstract: A forging device for producing a piston blank has a forging mold that has an essentially cylindrical cavity matching the radial outer surface of the piston blank, a forging base delimiting the cavity, and a central die consisting of a mandrel that has a conically tapering extension which is mounted on the mandrel and the shape of which matches the inner surface of the piston blank. In order to form the radially outer surfaces of the piston slipper walls and a peripheral cooling pocket located radially outside the slipper walls in the piston head, the forging device has two lateral jaws which are mounted in the forging device so as to be movable at an angle to the longitudinal axis of the forging device.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: October 10, 2017
    Assignee: MAHLE International GmbH
    Inventors: Roland Grunert, Juergen Friedrich, Timo Seng, Wolfgang Janisch, Armin Wenzel
  • Patent number: 9427790
    Abstract: The invention relates to a method for forming a surface relief on an available surface of a compacted sintered component which forms the workpiece, using a forming element that is moved in the working direction towards the available surface. The working direction runs radially in relation to the workpiece and a contact surface of the forming element. The shape of the surface having the relief is applied to the surface of the workpiece in the working direction.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: August 30, 2016
    Assignee: PMG Asturias Powder Metal S.A.U.
    Inventors: Diego Castro Menendez-Castanedo, Juan Ignacio Lopez Martinez, Ivan Jose Presa Lopez
  • Patent number: 9421603
    Abstract: A forging press for rotationally asymmetrical parts by warm or hot forming has a stationary press table, a vertically shiftable press ram above the press table, vertically delimiting with the press table a working space, and vertically displaceable between from an upper open position into a lower closed position. An upper part is carried by the ram in the space, and an upper die in the space is in turn carried on the upper part. A lower part sits on the table in the space and below the upper part and carries a lower die in the space and fittable with the upper die in the closed position. A first closing apparatus outside the space bears vertically on one of the dies, and a second closing apparatus outside the space bears vertically via the first closing apparatus on the one die.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: August 23, 2016
    Assignee: SMS MEER GMBH
    Inventors: Walter Toth, Johannes Rolf, Heinz Kannen, Peter Stenger
  • Patent number: 9021702
    Abstract: When forming a toothed portion on the outer section of a blank by contacting a tooth profile-forming portion of a forming die with a curved portion of the blank, the first projection of the blank is accommodated in a first depression, and a load is applied axially to a center section of the blank so a material of the blank flows radially outward. The material of the blank at the first projection flows in the axial direction to inside the first depression, and the material of the blank at an intermediate section between the center and the outer section flows in axially to inside a second depression to form a second projection. When the load is maximized, a space is provided between a toothed portion and the tooth profile-forming portion, between the first projection and the forming die, and between the second projection and the forming die.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: May 5, 2015
    Assignee: Aisin AW Co., Ltd.
    Inventors: Hiromu Sakamaki, Ariyoshi Terao, Toshifumi Nagata
  • Patent number: 8997355
    Abstract: A method for manufacturing a toothed part from a cylindrical blank using a forming die. When forming a toothed portion on a radially outer section of the blank by applying a load in the axial direction of the blank to a radially center section of the blank while constraining a portion of an outer circumferential surface of the blank such that a constituent material of the blank flows radially outward, the constituent material of the blank at an intermediate section between the center section and the outer section flows in the axial direction toward a depressed portion of the forming die to form a projection portion. When the load is at maximum, a space is provided between the toothed portion and the forming die, and a space is provided between the projection portion and the forming die.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: April 7, 2015
    Assignee: Aisin AW Co., Ltd.
    Inventor: Hiromu Sakamaki
  • 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
  • Patent number: 8893540
    Abstract: The invention relates to a component, a method, and a tool for forming, in particular for the lateral extrusion or upsetting of thin-walled preforms to form components having a structure formed thereon, in particular having a toothing, wherein, by carrying out the method according to the invention and by using the tool according to the invention, buckling of the wall of the preform during the forming process to form the component according to the invention is prevented.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: November 25, 2014
    Assignee: Schuler Cartec GmbH & Co. KG
    Inventors: Lars Gerlach, Michael Werbs, Andreas Bawohl, Karl Geisinger
  • 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
  • Patent number: 8707750
    Abstract: The invention relates to such a method and apparatus, as well as to the resulting deformed object out of a relatively hard material such as e.g. a metal or plastic wire in which an undeformed section (2) is clamped near its ends (3, 4) and is subsequently upset in a controlled way by an axial pressure force (22) to a predefined shortened and thickened longitudinal section (5), with which simultaneously over substantially the entire contour sheath (19) of this section (2) a counterforce (29) is exerted so that, with the progressive deformation during upsetting, the total volume of the longitudinal section that is deforming, remains substantially constant. In this thickened section (5) a flattened zone (8) can subsequently be applied in order to realise a final shape (10) such as an opening (26). The invention concerns in particular also the use of a deformation line (40) for manufacturing a heddle for weaving looms.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: April 29, 2014
    Assignee: Darvan Invest N.V.
    Inventor: Michel Deneire
  • Patent number: 8468912
    Abstract: A production method for an insertion end, especially for an insertion end of a drilling, chiseling or boring tool, including the following steps: a longitudinal groove is formed in the outer surface of a preferably cylindrical end piece of a blank, whereby the longitudinal groove acquires an open end section on a front face of the end piece. The outer surface of the end piece is surrounded by a die tool that engages into the longitudinal groove outside of its open end section. The open end section is closed in that the surrounded end piece is compressed by means of a stamp acting on the front face. The segmented, multi-component die tool preferably lies flush against the outer surface of the end piece outside of the longitudinal grooves.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: June 25, 2013
    Assignee: Hilti Aktiengesellschaft
    Inventors: Gerhard Schuetz, Frank Anschuetz, Thomas Traxler, Guenther Domani, Christian Schoerken, Gernot Weisser
  • Patent number: 8424208
    Abstract: Provided is a manufacturing method of an outer ring (3) of a back-to-back arrangement double-row angular ball bearing from a raw material (10) comprising a upsetting (A to B), a backward extrusion process (C to D), a punching (D to E), a rolling (E to F) and a finishing, wherein an outer diameter of a first intermediate material (11a) produced by the upsetting is equal to or smaller than an inside diameter of an inner periphery large diameter portion (18) of the inner circumference of a die (13) used in the backward extrusion process and larger than an inside diameter of an inner periphery small portion (19) of the die (13), and in a condition with the first intermediate material (11a) sitting on the inner periphery inclined portion (20) of the die (13), the intermediate material (11a) is pushed toward a base of the die (13) by a punch (14), to thereby the middle metal material (29) with the highest cleanliness of the raw material (10) is exposed to the two outer ring raceways (2) of the outer ring (3).
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: April 23, 2013
    Assignee: NSK, Ltd.
    Inventors: Kazuto Kobayashi, Hiroshi Koyama
  • Patent number: 8302447
    Abstract: A device and method are provided for forging sleeve-shaped parts such as pistons. The device includes a form with: an upper form mandrel (C); an outer form ring (A); a lower form mandrel (B); an ejector device with an upper ejector (G) for ejection through the upper form mandrel (C); a lower ejector (H) for ejection through the lower form mandrel (B). Optional support devices for the form include a lower reinforcement ring (D) for the lower region of the outer form ring (A), a form mandrel housing (F) for the upper region of the outer form ring (A), and a clamping base (E) to support the lower form mandrel (B), by means of which the lower ejector (H) may be operated. The device and method advantageously facilitates the manufacture of pistons having a long skirt length and a minimal wall thickness.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: November 6, 2012
    Assignee: Gesenkschmiede Schneider GmbH
    Inventors: Ernst-Peter Schmitz, Peter Kolbe
  • Patent number: 8122577
    Abstract: A ball joint 10 includes a first member 12 having a ball section 14 and a second member 15 having a socket 16. Ball section 14 is accommodated and supported inside socket 16. A pair of dies 20, 30 sandwich a wall 18 surrounding an opening 17 of the socket 16, and are configured to approach each other gradually, utilizing small repetitive vibrations that include an approaching and separating action, thereby intermittently pressing the wall in an inward radial direction. During each interval of the intermittent pressing action, a supporting and rotating device 40 rotates socket 16 (second member 15) in small increments about a central axis C2 of socket 16. Consequently, dies 20 and 30 successively press against a multitude of points on the circumference of the outer surface of wall 18 of the socket, thereby bending wall 18 inward so as to reduce the diameter thereof.
    Type: Grant
    Filed: October 17, 2008
    Date of Patent: February 28, 2012
    Assignee: Ogino Industrial Co., Ltd
    Inventor: Akira Ogino
  • Patent number: 8047043
    Abstract: An exemplary punch die (30) includes a lower die (40) and an upper die (50). The lower die includes a die core (45), a blank holder (417), and a cylinder (413) disposed in the lower die. The blank holder is disposed on a periphery of the die core. The cylinder is connected to the blank holder and provides a constant force to the blank holder. The upper die includes a punch core corresponding to the die core. A punch machine using the present punch die is also provided.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: November 1, 2011
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Pei-Chin Kuo, Juey-Fong Chang, Wen-Tao Wang, Zhi-Gang Hu, Cheng-Hung Lin
  • Patent number: 7900493
    Abstract: A closed forging die and a forging method with which sagging can be reduced, a constant velocity joint and a universal joint can be made compact and lightweight, removal of a shaft tip thereof by machining prior to heat treatment is not required, and material costs and machining costs can be reduced by using a closed forging die includes openable dies, and punches that move in an opening/closing direction of the dies to pressurize a material in the dies. By using the die, a product having shaft portions formed radially is manufactured. A clearance is provided to each of the formed shaft portions between a tip surface, and abutting portions are provided to the dies side abutting against at least a tip side of an outer circumferential surface of the shaft portions.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: March 8, 2011
    Assignee: NTN Corporation
    Inventors: Miao Jiahua, Akira Sera, Nobuo Suzuki
  • Patent number: 7805971
    Abstract: A forging die and process suitable for producing large forgings, including turbine disks and other rotating components of power-generating gas turbine engines, using billets formed by powder metallurgy. The forging die includes a backplate, and segments arranged in a radial pattern about a region on a surface of the backplate. Each segment has a backside facing the backplate and an interface surface facing away from the backplate, with the interface surface being adapted to engage the billet during forging. The segments are physically coupled to the surface of the backplate in a manner that enables radial movement of the segments relative to the backplate.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: October 5, 2010
    Assignee: General Electric Company
    Inventors: Ronald Ralph Cairo, Joseph Jay Jackson, George Albert Goller, Raymond Joseph Stonitsch
  • Publication number: 20100210369
    Abstract: A wheel bearing device of the invention includes a flanged shaft member that includes a shaft portion to which a rolling bearing is assembled, a fitting shaft portion that is formed on one end side of the shaft portion and that is fitted to a center hole of a wheel, and a plurality of flange portions that extend radially outward on an outer peripheral surface located between the shaft portion and the fitting shaft portion and each of which has a bolt hole in which a hub bolt for fastening the wheel is arranged. Each flange portion is formed by side extrusion when a forged recess is formed at a center of an end surface of the fitting shaft portion by cold forging.
    Type: Application
    Filed: February 11, 2010
    Publication date: August 19, 2010
    Applicant: JTEKT CORPORATION
    Inventors: Yoshinori Masuda, Tatsuya Yokota, Nobuyuki Seo, Takanobu Murakami, Tsuyoshi Okumura, Yoshito Takada
  • Publication number: 20100199741
    Abstract: The present invention provides a necking system including a plurality of necking dies each necking dies having an at least partially non-polished necking surface and a non-polished relief following the necking surface. The present invention further provides a method of necking a metal container including providing a metal blank; shaping the blank into a bottle stock; and necking the metal bottle stock, wherein necking includes at least one necking die having an at least partially non-polished necking surface.
    Type: Application
    Filed: April 26, 2010
    Publication date: August 12, 2010
    Applicant: ALCOA INC.
    Inventors: Gary L. Myers, Anthony Fedusa, Robert E. Dick
  • Patent number: 7761995
    Abstract: A gear wheel includes multiple helical toothings, each having a different helical angle. A pressing method for molding a gear wheel involves introducing a compactable material into a chamber of a pressing tool, compacting the material, exposing the helical toothings of the gear wheel, and removing the molded body from the pressing tool. A pressing tool for pressing, as one part, a gear wheel, includes a matrix, cylindrical first and second molding tool parts which can be translated along and then rotated about a longitudinal axis, and a driver coupled to the molding tool parts or driving them. The molding tool parts can be moved towards and away from each other and the inner surface of the matrix delimits the chamber and is shaped to allow a linear axial sliding movement of the compactable material relative to the matrix.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: July 27, 2010
    Assignee: Schwaebische Huettenwerke Automotive GmbH & Co. KG
    Inventors: Manfred Arlt, Gerhard Subek, Thomas Franz, Christian Reimann, Otto Stock, Anton Eiberger
  • Publication number: 20100126020
    Abstract: The invention relates to a method for cold-form profiling cylindrical, thin-walled hollow parts (1), comprising profiles (4) which extend in an essentially parallel manner in relation to the longitudinal axis (A) of the hollow part (1). At least one profiling tool (5) engages in a strike-like hammering manner with the outside of the hollow part (1) in a radial manner in relation to the longitudinal axis (A) of the hollow part (1). The profiling tool (5) engages, respectively, in an essentially vertical and oscillating manner on the surface of the hollow part (1). Then, the profiling tool (5) is displaced in an axial manner in relation to the hollow part (1) at a constant radial adjusting depth until the desired profile length is obtained.
    Type: Application
    Filed: July 15, 2005
    Publication date: May 27, 2010
    Inventor: Daniel Deriaz
  • Patent number: 7712221
    Abstract: A machine, method and tooling to precision cold-form roller blanks for anti-friction bearings. The machine is a multistage progressive former using floating die cavities to enable simultaneous shaping of the ends of the roller with high accuracy and without flash. The tools and staged forming create an improved roller with an advantageous grain pattern and devoid of structural defects previously attributable to the presence of sheared end face material in the radiused corners of the blank and flash at its mid-section.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: May 11, 2010
    Assignee: National Machinery LLC
    Inventors: Donald E. Krintzline, Mark W. Bordner
  • Patent number: 7676902
    Abstract: In order to realize a method of forming a rotor core that improves the productivity and enhances the product accuracy, a forming method of a rotor that is equipped with both permanent-magnet fastener on the inner perimetric end of the magnetic pole claw of the rotor core and tapered surface on the outer perimetric end on one end of the magnetic pole claw in the circumferential direction. By constraining the inner perimetric surface of the magnetic pole claw by a die and applying a forming pressure in the radial direction, the tapered surface on the outer perimetric end of the magnetic pole claw and permanent-magnet fastener on the inner perimetric end can be formed at the same time and a rotor core with high product accuracy and mass-productivity is realized.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: March 16, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Masaru Kawai, Kouji Harada, Masayuki Kobayashi, Shinji Yamazaki
  • Patent number: 7594331
    Abstract: A method for forming a joining profile in a structural member comprises providing an assembly having a base member, a forming body and a pair of side anvils having profiles formed therewithin. The method further comprises mounting the structural member on the base member, advancing the forming body toward the structural member such that the structural member is clamped to the base member, urging the side anvils toward flanges of the structural member, forming a profile in each of the flanges, and engaging protrusions of the side anvils with the web such that opposing portions of the web are forced upwardly by the protrusions at locations adjacent to each one of the flange profiles in order to accommodate formation of the flange profiles in the structural member. Formation of the joining profiles in the structural members allows for detachable engagement thereof with another member having a corresponding mating profile.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: September 29, 2009
    Assignee: Wiltin Pty. Ltd.
    Inventors: William J. Andrews, Geoffrey Darmody, Albert S. Hill
  • Patent number: 7587825
    Abstract: A method of forming a wheel disc starts with a flat blank. A plurality of windows are formed in the wheel disc, wherein each window has a respective outer edge proximate with a continuous outer band around a periphery of the wheel disc. The windows define a plurality of spokes between adjacent windows, and the angular size of each of the windows along the outer band is preferably greater than the angular size of each of the spokes. The outer band is partially closed toward a cylindrical shape by engaging a cam die against at least a portion of the outer band. The outer band is substantially fully closed into a cylindrical shape by axially wiping the outer band using a cylindrical die. The intermediate camming operation achieves the desired final shape after wiping without introducing stresses that would weaken or distort the wheel disc.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: September 15, 2009
    Assignee: Hayes Lemmerz International, Inc.
    Inventors: Alan Coleman, Tom Czarniecki, Bill Fowler
  • Publication number: 20090223271
    Abstract: An upsetting method capable of reducing a molding pressure is provided. The upsetting method uses a receiving die 11 and a guide 20 having an insertion hole 23 for inserting and holding a diameter expansion scheduled portion 2 of the raw material 1 in a buckling prevented state and in an axially slidable manner, the insertion hole being penetrated from the basal end to the tip end of the guide 20.
    Type: Application
    Filed: November 14, 2006
    Publication date: September 10, 2009
    Applicant: SHOWA DENKO K.K.
    Inventor: Atsushi Otaki
  • Publication number: 20090217730
    Abstract: An upsetting method capable of eliminating a correction step by preventing occurrence of quench distortion is provided. The method includes the step of preparing an upsetting apparatus 10 equipped with a forming die 11 and a guide 20 having an insertion hole 21 for securing a diameter expansion scheduled portion 2 of the bar-shaped raw material 1 in a buckling preventing state and a punch 30. The diameter expansion scheduled portion 2 of the raw material 1 in a heated state is disposed in the insertion hole 21 of the guide 20 in a heated state, and the tip end portion of the guide 20 is disposed in the cavity 12 of the forming die 11 adjusted in temperature so as to be below a temperature of the raw material 1, and the raw material is secured to the securing portion 13 of the forming die 11.
    Type: Application
    Filed: June 16, 2006
    Publication date: September 3, 2009
    Applicant: Showa Denko K.K.
    Inventor: Atsushi Otaki
  • Patent number: 7559145
    Abstract: A method of forming a wheel disc starts with a flat blank. A plurality of windows are formed in the wheel disc, wherein each window has a respective outer edge proximate with a continuous outer band around a periphery of the wheel disc. The windows define a plurality of spokes between adjacent windows, and the angular size of each of the windows along the outer band is preferably greater than the angular size of each of the spokes. The outer band is partially closed toward a cylindrical shape by engaging a cam die against at least a portion of the outer band. The outer band is substantially fully closed into a cylindrical shape by axially wiping the outer band using a cylindrical die. The intermediate camming operation achieves the desired final shape after wiping without introducing stresses that would weaken or distort the wheel disc.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: July 14, 2009
    Assignee: Hayes Lemmerz International, Inc.
    Inventors: Utz Jäcke, Ramon J. Aquilué, Jordi Bosch
  • Publication number: 20090116932
    Abstract: First upsetting is conducted in which an annular sidewall part is plastically deformed outward in the radial directions by a first molding part of a punch to thereby form a first-upsetting molded part on one end. Subsequently, second upsetting is conducted in which a solid part is pressed with the punch and the solid part is plastically deformed outward in the radial directions by a split mold which is descending. Thus, the plastically deformed part comes into and fills a second molding part of the split mold to form a second-upsetting molded part on the other end in the axis direction. Simultaneously therewith, an undercut part is formed between the first-upsetting molded part and the second-upsetting molded part by an undercut-molding part of the split mold.
    Type: Application
    Filed: September 14, 2006
    Publication date: May 7, 2009
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Takashi Kihara, Takeshi Shiraishi
  • Patent number: 7526862
    Abstract: Method of manufacturing a hollow blade (1) for a turbomachine in which the blade (1) is made from a preform (14) obtained from external primary parts (28, 30). In order to reduce costs, the root part (2) of the blade is formed from spare material (34) entirely located on only one of the two external primary parts of the preform (14).
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: May 5, 2009
    Assignee: Snecma
    Inventors: Stéphane André Leveque, Daniel Gaston Lhomme, Alain Lorieux
  • Publication number: 20080250839
    Abstract: A method and apparatus for manufacturing a legged annular member. In one aspect, a work member is formed from a ring-like raw material, and has an annular part and an outer wall part, which is formed from a leg part and a connecting part. The connecting part is removed from the work member to form an intermediate legged annular member having an annular part and a leg part. An inner diameter of the leg part of the intermediate legged annular member is expanded while a burr is removed to form a carrier, which serves as a legged annular member. Therefore, the number of manufacturing processes until completion of the carrier can be reduced, compared to performing separate processes to expand the diameter of the leg part and remove the burr. Thus, it is possible to shorten the period of time needed for completion of the carrier.
    Type: Application
    Filed: March 24, 2008
    Publication date: October 16, 2008
    Applicant: AISIN AW CO., LTD.
    Inventors: Masaki Nakajima, Takehiko Adachi, Ariyoshi Terao
  • Patent number: 7377042
    Abstract: A machine, method and tooling to precision cold-form roller blanks for anti-friction bearings. The machine is a multistage progressive former using floating die cavities to enable simultaneous shaping of the ends of the roller with high accuracy and without flash. The tools and staged forming create an improved roller with an advantageous grain pattern and devoid of structural defects previously attributable to the presence of sheared end face material in the radiused corners of the blank and flash at its mid-section.
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: May 27, 2008
    Assignee: National Machinery LLC
    Inventors: Donald E. Krintzline, Mark W. Bordner
  • Publication number: 20070277578
    Abstract: A mechanical timepiece has a plurality of divisional segments divided in a movable manner, a driving source operable to produce a driving rotation for moving the divisional segments, an ornamental portion to be exposed by outward movement of the divisional segments, and a plurality of driving mechanisms operable to move the divisional segments and rotate them about their axes so as to change an exposure state of the ornamental portion by using the driving rotation transmitted from the driving source.
    Type: Application
    Filed: May 29, 2007
    Publication date: December 6, 2007
    Applicant: SEIKO CLOCK INC.
    Inventor: Toyonori Muraji
  • Patent number: 7210325
    Abstract: A tube partial thread forming apparatus and method is disclosed. A tube is placed on the apparatus around internal die sections, which are separated by a mandrel to cause the internal die sections to engage the tube. stripper pieces are moved into engagement around the outer surface of the tube to secure and support the tube. External die sections extend through the stripper pieces and engage the tube and form partial threads thereon.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: May 1, 2007
    Assignee: Aries Engineering Company, Inc.
    Inventors: Todd M. Brieschke, David G. Copeman
  • Patent number: 7185524
    Abstract: A method for manufacturing a surgical needle devoid of a grinding process includes the steps of swaging a needle blank to define a substantially tapered or conical needle end, pressing the tapered needle to form a plurality of intersecting surfaces and forming cutting edges along the lines of intersection of the intersecting sides. The needle may be subjected to an etching process (e.g., an acid bath) to sharpen the cutting edges and/or provide a matte finish on the needle. The needle produced by the novel process is extremely sharp and durable, and exhibits an enhanced retention of sharpness relative to conventional ground needles over periods of prolonged use.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: March 6, 2007
    Assignee: Tyco Healthcare Group LP
    Inventor: Michael W. Bogart
  • Patent number: 7000444
    Abstract: A method of producing a bevel gear, particularly a bevel ring gear, the bevel gear comprising mounting surfaces. The method comprising the steps of flashless warm forging a blank, preferably an annular blank, in a forging die to produce the bevel gear with precision forged teeth; performing a hardening operation on the teeth; and then, without machining, finishing the teeth by lapping the teeth with a mating bevel gear. A die apparatus for use in a press for forging the bevel ring gear from the annular blank is also disclosed.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: February 21, 2006
    Assignee: Bishop Innovation Limited
    Inventors: Klaus Jurgen Roeske, Andrew William Hassett
  • Patent number: 6961986
    Abstract: An auxiliary joining element is joint to a sheet metal work-piece with a foot deformed to interlock the auxiliary joining element to the sheet metal work-piece. The foot is depressed into the sheet metal work-piece, which is retained over a die having a recess defined by a wall. The wall is interrupted by die parts that are movable radially inwardly of the wall. The foot deforms the sheet metal work-piece into the recess and simultaneously forces the die parts radially inwardly of the wall. Spaced undercuts are formed by the die parts in the foot and the deformed sheet metal work-piece for retaining the auxiliary joining element to the sheet metal work-piece.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: November 8, 2005
    Assignee: Profil Verbindungstechnik GmbH & Co. KG
    Inventor: Rudolf Müller
  • Patent number: 6877350
    Abstract: A production method involving forming an inner joint part of a constant velocity universal ball joint in the form of a hub member (11) which comprises a central through-aperture (14) with inner toothing (16) for receiving a shaft journal (12), and ball tracks (15) for receiving torque transmitting balls on the outer circumference, wherein a blank with largely finish-formed ball tracks is produced by non-chip-forming deformation; wherein, at the blank, outer surfaces and a smooth through-aperture (14) are finish-turned; and wherein, during simultaneous working stages, the ball tracks (15) are calibrated by non-chip-forming deformation and the inner toothing (16) in the through-aperture (14) is produced by pressing in a non-chip-forming way.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: April 12, 2005
    Assignee: GKN Automotive GmbH
    Inventors: Peter Fuhrmann, Herbert Frielingsdorf, Volker Hainz, Jean Spolmayeur
  • Publication number: 20040255637
    Abstract: A method for forming a longitudinal component (1) with mass accumulation at each end thereof from an elongate blank. The method comprising, placing the blank in a cavity of a die means (20) having a longitudinal axis about which is disposed a plurality of movable forming elements (6, 7, 8, 9, 10, 11 etc), and at least first and second movable abutment elements spaced apart and disposed on the longitudinal axis at opposite ends of the cavity. Moving the forming elements into engagement with a central portion (2) of the blank thereby squeezing and narrowing the blank in the central portion, and urging resultant mass accumulations towards each end of the blank. Also relatively moving the first and second abutment elements (16, 17) towards each other along the longitudinal axis to engage with mass-accumulations at respective opposite ends of the cavity. This in combination with the forming elements determines the final form of the component.
    Type: Application
    Filed: June 1, 2004
    Publication date: December 23, 2004
    Inventor: Juergen Dohmann
  • Patent number: 6745468
    Abstract: A formed stainless steel steering wheel is produced by a process that includes starting with a linear stock of round tubing which is then formed into a generally circular shape with an oval-shaped cross-section. The two ends of the curved tubing are then welded together to form a circular blank. The blank is then placed into a circular die having forming punches associated therewith to strike the blank to form finger grip indentations therein. The circular die is then rotationally indexed so that the forming punches can form subsequent finger grip indentations around the circumference of the blank adjacent to the previously formed indentations in a predetermined pattern until the steering wheel rim is completed. By utilizing multiple, preferably three, forming punches equidistantly spaced along the circumference of the circular die, the finger grip indentations can be formed without crushing the blank.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: June 8, 2004
    Assignee: Schmitt Marine Steering Wheels, Inc.
    Inventor: Gervase G. Schmitt
  • Patent number: 6672126
    Abstract: The invention comprises a cam die. The cam die comprises at least one cam ring. The cam ring comprises a plurality of moveable cam teeth. The cam teeth are moveable on a normal toward an axis of the cam die by a cam actuator. The cam actuator has an inside diameter that is less than an outside diameter of the cam ring. As the cam actuator moves parallel to the cam die axis along an outside circumference of the cam ring, the cam teeth are progressively engaged and pressed inwardly toward a work piece. The work piece is moved simultaneously with the cam actuator by action of a punch that is concentric with the cam actuator and within the diameter of the cam ring. Each cam tooth is simultaneously engaged with the work piece as the work piece passes. A resilient member returns each cam tooth to a starting position after the cam actuator is withdrawn, allowing ejection of a finished part.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: January 6, 2004
    Assignee: The Gates Corporation
    Inventor: Yahya Hodjat
  • Patent number: 6651300
    Abstract: A clenching device for generating a clenching connection between a first workpiece and a second workpiece using a plunger which is movable from above into a recess of a die, wherein a peripheral wall of the recess has stationary wall sections which extend essentially parallel to a pressure direction. The peripheral wall of the recess has between the stationary wall sections movable wall sections which are arranged on levers. The levers are movable by pressures from above into a working position and are securable therein and from undercut areas and are movable by movement of the workpieces after the workpieces have been jointed in the upward direction into a release position in which the undercut areas are completely released.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: November 25, 2003
    Assignee: Dalex-Werke Niepenberg GmbH & Co. KG
    Inventor: Rudolf Müller
  • Publication number: 20030177808
    Abstract: The invention comprises a cam die. The cam die comprises at least one cam ring. The cam ring comprises a plurality of moveable cam teeth. The cam teeth are moveable on a normal toward an axis of the cam die by a cam actuator. The cam actuator has an inside diameter that is less than an outside diameter of the cam ring. As the cam actuator moves parallel to the cam die axis along an outside circumference of the cam ring, the cam teeth are progressively engaged and pressed inwardly toward a work piece. The work piece is moved simultaneously with the cam actuator by action of a punch that is concentric with the cam actuator and within the diameter of the cam ring. Each cam tooth is simultaneously engaged with the work piece as the work piece passes. A resilient member returns each cam tooth to a starting position after the cam actuator is withdrawn, allowing ejection of a finished part.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Inventor: Yahya Hodjat
  • Patent number: 6536257
    Abstract: For the purpose of providing a speed-changing gear manufacturing apparatus capable of forming back-tapered spline teeth having a chamfer at the tip with high accuracy, by forming both side faces of spline teeth in back-tapered shape and forming the tip in chamfered shape at a time, the present invention is a speed-changing gear manufacturing apparatus comprising dies formed at regular intervals on a circumference, to enable to move a plural number of spline teeth forming units for forming back-tapered spline teeth on lines extending radially from the center axis of the gear material, and a pressing member for moving the spline teeth forming units toward the center axis of the gear material, by pressing the outer circumferential face of the spline teeth forming units of the dies, wherein said spline teeth forming units are constructed in a way to form an open space in which to form both side faces of spline teeth in back-tapered shape and form the tip in chamfered shape at a time, in contact with the adjacent
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: March 25, 2003
    Assignee: Gohsyu Corporation
    Inventors: Sakae Nishigori, Tadashi Okumura
  • Patent number: 6457341
    Abstract: The invention relates to a forging apparatus used for forging a heated blank (24a), which in a pre-treated operation has been given a volume essentially corresponding to that of the final product, said forging apparatus comprising upper and lower die parts (2, 16) arranged to be brought together into abutting relationship and having contacting surfaces (42a, 18b) extending transversely of the direction of movement of the die parts, whereby when the contacting surfaces (42a, 18b) are pressed together and brought into contact with one another as result of pressure exerted thereon, the blank is shaped in conformity with a die cavity defined with precision by the die parts (2, 16). The configuration of the forged component then essentially agrees with that of the desired finished component, i.e. no or at least only minimum post-treatment is required.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: October 1, 2002
    Inventor: Eric Wirgarth
  • Publication number: 20010032487
    Abstract: For the purpose of providing a speed-changing gear manufacturing apparatus capable of forming back-tapered spline teeth having a chamfer at the tip with high accuracy, by forming both side faces of spline teeth in back-tapered shape and forming the tip in chamfered shape at a time, the present invention is a speed-changing gear manufacturing apparatus comprising dies formed at regular intervals on a circumference, to enable to move a plural number of spline teeth forming units for forming back-tapered spline teeth on lines extending radially from the center axis of the gear material, and a pressing member for moving the spline teeth forming units toward the center axis of the gear material, by pressing the outer circumferential face of the spline teeth forming units of the dies, wherein said spline teeth forming units are constructed in a way to form an open space in which to form both side faces of spline teeth in back-tapered shape and form the tip in chamfered shape at a time, in contact with the adjacent
    Type: Application
    Filed: April 19, 2001
    Publication date: October 25, 2001
    Inventors: Sakae Nishigori, Tadashi Okumura
  • Patent number: 6178801
    Abstract: Crown twist forming teeth (14) are formed on the inside circumferential surface of a finishing die (13) with the thickness of each teeth being thinner in the middle part than toward both ends in the axial direction. The finishing die (13) is fitted for axial sliding in the axial direction in the axially central part of a die holder (11) through taper surfaces (12a, 13a) diminishing from its one end to the other. A half-finished work (35, 35′) with its outside circumferential surface having rough-formed twist teeth is brought into screw engagement with the finishing die (13). A first punch (25) for pressing the half-finished work (35, 35′) from one axial end toward the other, and a second punch (26) for pressing the finishing die (13) from one axial end toward the other are provided.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: January 30, 2001
    Assignee: Ohashi Technica, Inc.
    Inventor: Hitoshi Ishida