Both Tools Telescoping Into Closed Die Patents (Class 72/355.6)
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Patent number: 11359995Abstract: A gas sensor (1) has a sensor element (21) extending in an axis direction and having, at a top end side thereof, a detecting portion (22) that detects gas; a stainless steel-made tubular metal shell (11) enclosing a radial direction periphery of the sensor element (21) and holding the sensor element (21) and having (a) a brim portion (14) protruding outwards in a radial direction and (b) a crimp portion (16) formed at a rear end side of the metal shell (11); and a sealing member (41) placed between the sensor element (21) and the metal shell (11). The crimp portion (16) is bent inwards in the radial direction and pressing down a rear end of the sealing member (41) toward the top end side. A Micro Vickers hardness of a cross section along the axis direction of the crimp portion (16) is 140 to 210 Hv.Type: GrantFiled: January 24, 2019Date of Patent: June 14, 2022Assignee: NGK SPARK PLUG CO., LTD.Inventors: Kensuke Mizutani, Daisuke Miyata, Kengo Simizu, Naoyuki Sugihara, Yasuhiro Fujii
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Patent number: 11285524Abstract: Some embodiments disclosed herein are directed to a tubular member including a central axis, a first end, a second end opposite the first end, an upset region between and axially spaced from the first end and the second end, and a first outer diameter axially spaced midway between the first end and the upset region. The upset region includes a second diameter which is larger than the first diameter, does not include a weld joint, and includes redistributed material from the tubular member.Type: GrantFiled: June 17, 2020Date of Patent: March 29, 2022Assignee: National Oilwell Varco, L.P.Inventor: Andrei Muradov
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Patent number: 11020871Abstract: A method for making a blind hole may include arranging a workpiece in a negative form with a first portion and a second portion. The first portion may include a recess. The second portion may include a guide for a punch. The recess may be arranged substantially coaxially to the guide. The method may also include displacing a material of the workpiece into the recess via pressing the punch into the workpiece. Additionally, the method may include pressing the punch into the workpiece in a first movement section with a first velocity. The method may further include further pressing the punch into the workpiece in a second movement section with a second velocity such that the material is sheared and is partly extruded into the recess. The method may include moving the first portion relative to the second portion and shearing off the material displaced within the recess.Type: GrantFiled: August 14, 2018Date of Patent: June 1, 2021Inventors: Wolfgang Rixen, Gerrit Pies
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Patent number: 10974302Abstract: Provided is a manufacturing method for a cylindrical portion in a cylindrical shape protruding in a plate thickness direction of a plate-like portion made of metal, the cylindrical portion being formed integrally with the plate-like portion. The manufacturing method uses a manufacturing device including: a first metal mold provided with an inner circumferential surface that comes in contact with an outer circumferential surface of the cylindrical portion; a second metal mold coming in contact with a protruding tip of the cylindrical portion; and a third metal mold coming into press contact with a workpiece toward a side of the second metal mold. The third metal mold is displaced toward the side of the second metal mold and a portion of the workpiece undergoes plastic flow toward the inner circumferential surface, whereby the portion that underwent the plastic flow comes into press contact with the inner circumferential surface.Type: GrantFiled: May 25, 2018Date of Patent: April 13, 2021Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHAInventor: Yuta Yamakita
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Patent number: 10790638Abstract: An outer periphery of the tubular housing includes a parallel surface, a pressure contact surface and a connection surface. The parallel surface is formed parallel to an axial direction of the spark plug. The pressure contact surface is located closer to a tip of the spark plug and more radially inward than the parallel surface. The pressure contact surface has a tapered shape in that a diameter decreases toward the tip. The pressure contact surface is pressed against a cylinder head when installed in the internal combustion engine. The connection surface is located closer to a base of the spark plug than an extension line in a longitudinal cross-section of the spark plug parallel to the axial direction including a plug central axis. The connection surface connects an outer peripheral end of the pressure contact surface with a longitudinal end of the parallel surface.Type: GrantFiled: January 21, 2020Date of Patent: September 29, 2020Assignee: DENSO CORPORATIONInventor: Kazuhide Kawai
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Patent number: 9958079Abstract: A device for a plumbing installation, the device, for example, may be a valve, such as valve (1), or a fluid flow meter (6), and has a casing (10) that is hydraulically formed from metal tubing so as to have a wall surrounding a void interior. The casing (10) is provided with one or more formations, such as shoulders (64) and (65) and at least one inlet opening (14) and at least one outlet opening (18). A cartridge (12) is at least partly located in the void interior of the casing (10). The cartridge (12) has at least two openings, being a first opening (20) and a second opening (22). Seals (46), (48) and (50) are provided between the casing (10) and the cartridge (12). The cartridge (12) is accommodated in the casing (10) by the one or more formations of the casing (10). The cartridge (12) is provided with the operational components of the device (1). The inlet opening (14) of the casing (10) and the first opening (20) of the cartridge (12) are in fluid communication.Type: GrantFiled: September 14, 2012Date of Patent: May 1, 2018Assignee: TRITECK LIMITEDInventors: Peter John Morris, Garry Rodney White
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Patent number: 9643238Abstract: There is provided a method of manufacturing a metal shell formed body by cold forging for a metal shell of a spark plug. In the manufacturing method, a semi-finished formed body is first provided with a second inner step without the formation of an annular front end portion. After the semi-finished formed body is inserted from its front end side into a die, a punch is pushed into the semi-finished formed body from its rear end side. By pushing the punch, an annular front-facing surface of the punch is pushed onto the second inner step so as to press a front end portion of the formed body against an annular front end portion forming part of the die. By such a forming step, the metal shell formed body is obtained in which the annular front end portion is formed by extrusion.Type: GrantFiled: July 7, 2014Date of Patent: May 9, 2017Assignee: NGK SPARK PLUG CO., LTD.Inventors: Satoru Ochiai, Mitsunari Kariya
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Publication number: 20150128419Abstract: A forging apparatus carries out a method of manufacturing a gear having external teeth on an outer circumferential wall surface thereof and internal teeth on an inner circumferential wall surface thereof. First, an internal tooth forming die is inserted through a through hole defined in a workpiece. Next, a pressing die is caused to abut against the workpiece, and an external tooth machining die finishes the external teeth while preventing a support die from being lowered under action of damping mechanisms. Thereafter, a pressing die presses the workpiece to apply a load in excess of a preset load for the damping mechanisms. The support die is then lowered to lower the workpiece along the internal tooth forming die. At this time, the internal teeth are formed on the inner circumferential wall surface of the workpiece.Type: ApplicationFiled: October 27, 2014Publication date: May 14, 2015Inventors: Takeshi OZEKI, Shoji NAMIKI
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Publication number: 20150128679Abstract: A forward extrusion forging apparatus includes: a die having a hollow portion whose diameter is reduced at an intermediate position; and a punch that is positioned behind a workpiece placed in the hollow portion, slides in the hollow portion, and extrudes the workpiece ahead of the hollow portion so that the workpiece is forged. An extruding surface of the punch, which extrudes the workpiece, is recessed in a direction opposite an extruding direction in a manner such that a center portion of the extruding surface is most recessed.Type: ApplicationFiled: November 12, 2014Publication date: May 14, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Dai KOBUCHI, Daisuke ICHIGOSAKI, Eisuke HOSHINA
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Patent number: 8677797Abstract: With a first push rod which is to be inserted/removed into/from a steel pipe through an opening at one end and a second push rod which is to be inserted/removed into/from the steel pipe through an opening at the other end, a metal core disposed on a side on which the first push rod is inserted/removed into/from the die assembly is sandwiched and this metal core is stopped from rotating with the first push rod. With the state of stopping the rotation of the first push rod, the metal core is introduced into the steel pipe through the opening at the one end by both the push rods. After the metal core is pressed into the steel pipe while stopped from rotating with the first push rod, this metal core is pushed back by the second push rod.Type: GrantFiled: March 20, 2008Date of Patent: March 25, 2014Assignee: Neturen Co., Ltd.Inventors: Takashi Yamawaki, Takuya Nakamizo
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Patent number: 8474295Abstract: The invention describes a method of compacting the surface of a sintered part (2), whereby a sintered part (2) is moved in a die (1) along an axis (3) in a pressing direction (20) through several die portions (7, 8, 9) from a first die portion (7) at a first die orifice (6) into a last die portion (9), and a wall surface (16) of each die portion (7, 8, 9) forms at least one pressing surface (18) against which a contact surface (17) formed by an external surface (12) of the sintered part (2) is pressed, and an internal contour (25) defined by the pressing surface (18) lying in a cross-section by reference to the axis (3) at least approximately corresponds to an external contour (26) defined by the contact surface (17).Type: GrantFiled: August 31, 2007Date of Patent: July 2, 2013Assignee: Miba Sinter Austria GmbHInventors: Herbert Schmid, Karl Dickinger, Wolfgang Siessl
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Patent number: 8468696Abstract: In a crankshaft 200, one hole 213L formed in a crankpin 213 has a bottom surface having a larger area and a depth from a surface of the crankpin less than those of another hole 213M. In forming the hole 213L and the hole 213M, a preformed product 200 of the crankshaft having a shape smaller than that of a cavity is disposed in a die set and punches are simultaneously inserted into the crankpin 213. By this operation, the hole 213L and the hole 213M are simultaneously formed in each crankpin 213 of the preformed product 200.Type: GrantFiled: March 10, 2010Date of Patent: June 25, 2013Assignee: Honda Motor Co., Ltd.Inventors: Takayuki Ohnuma, Tsutomu Ando, Yasuhiro Ito
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Patent number: 8322184Abstract: A method of producing a metallic shell for a spark plug, including steps of preparing a first intermediate article by using a first die including a first large diameter cavity larger in diameter than a metal blank, a first small diameter cavity smaller in diameter than the metal blank, a curved tapered cavity between the first large diameter cavity and the first small diameter cavity, and an oil drain cavity between the first large diameter cavity and the tapered cavity and substantially same in diameter as the metal blank, wherein the metal blank is inserted in the first large diameter cavity and extruded to allow a configuration of the metal blank to conform to the first large diameter cavity, the oil drain cavity, the tapered cavity and the first small diameter cavity while being pressed by a punch, and preparing a second intermediate article by using a second die.Type: GrantFiled: March 2, 2010Date of Patent: December 4, 2012Assignee: NGK Spark Plug Co., Ltd.Inventor: Mitsunari Kariya
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Patent number: 8302447Abstract: 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: GrantFiled: April 24, 2007Date of Patent: November 6, 2012Assignee: Gesenkschmiede Schneider GmbHInventors: Ernst-Peter Schmitz, Peter Kolbe
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Patent number: 8250897Abstract: A method for producing a high strength workpiece material includes the steps of: placing an alloy material 10 into a central space of a cylindrical mold 2; vertically compressing both end faces of the material in the central space with a press member 5 and a first support member 3, thereby causing one lengthwise end of the material to flow radially outward along an end face of the cylindrical mold 2 to form an expanded part; bringing the press member 5 into contact with a lengthwise end face of the expanded part so as to press the expanded part against the end face of the cylindrical mold 2; and increasing the distance between the press member 5 and the end face of the cylindrical mold 2 while decreasing the distance between the press member 5 and the first support member 3, thereby continuously causing the radially outward flow from one end to another end of the material to gradually increase the thickness of the expanded part.Type: GrantFiled: October 3, 2007Date of Patent: August 28, 2012Assignee: Gohsyu Co., Ltd.Inventors: Shigeru Nishigori, Toru Akita, Yoshinori Goho, Katsuyoshi Kondoh
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Patent number: 8037731Abstract: A forging method and forging apparatus able to improve a dimensional precision of a forged article and able to reduce the machining processes to a minimum and thereby reduce costs are provided. That is, a forging method placing a workpiece inside of a die, pressing the workpiece by a top part of the die in the axial direction toward the bottom part side of the die, and making the material of the end face of the workpiece flow to form the end face of the workpiece into a recessed/projecting shape, which forging method characterized by using independent pressing and holding means for pressing and holding the workpiece in the axial direction independent for the top part and the bottom part at the time of the press forming.Type: GrantFiled: September 28, 2007Date of Patent: October 18, 2011Assignee: Denso CorporationInventors: Tetsurou Yabuki, Hideyuki Sato, Hiroyuki Fujii
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Patent number: 7761995Abstract: 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: GrantFiled: October 13, 2006Date of Patent: July 27, 2010Assignee: Schwaebische Huettenwerke Automotive GmbH & Co. KGInventors: Manfred Arlt, Gerhard Subek, Thomas Franz, Christian Reimann, Otto Stock, Anton Eiberger
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Patent number: 7690236Abstract: A hole punching method capable of executing hole punching with high material yield at a low load and preventing occurrence of underfill is provided.Type: GrantFiled: May 25, 2006Date of Patent: April 6, 2010Assignee: Showa Denko K.K.Inventor: Atsushi Otaki
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Patent number: 7681428Abstract: A forging method for upsetting end portions of a raw material as diameter expansion scheduled portions includes: providing an upsetting apparatus having a fixing die, guides each having an insertion passage for inserting and holding an end portion of the raw material in a buckling preventing state, and punches each for axially pressing the end portion of the raw material inserted in and held by the insertion passage; inserting end portions of the raw material with the end portions protruded from the fixing die into the insertion passages; and moving the guides in direction opposite to moving direction of the punches such that length of exposed portion of the raw material becomes equal to or less than buckling limit length at cross-sectional area of the exposed portion of the raw material while simultaneously axially pressing the end portions of the raw material with the punches.Type: GrantFiled: October 21, 2008Date of Patent: March 23, 2010Assignee: Showa Denko K.K.Inventors: Atsushi Otaki, Hidemitsu Hamano
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Patent number: 7673489Abstract: An axial intermediate portion of raw material is held with a holding die in a state in which the intermediate portion is prevented from being enlarged in diameter. The axial end portions of the raw material is inserted in forming dented portions formed at axial end portions of the holding die. The scheduled diameter-enlarging portions are inserted in insertion passages formed in guides. Then, the scheduled diameter-enlarging portions are simultaneously pressed with punches to fill the material of the scheduled diameter-enlarging portions in corresponding forming dented portion while moving each guide in a direction opposite to a moving direction of each punch, thereby enlarging each scheduled diameter-enlarging portion.Type: GrantFiled: October 20, 2004Date of Patent: March 9, 2010Assignee: Showa Denko K.K.Inventors: Atsushi Otaki, Hidemitsu Hamano
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Patent number: 7506527Abstract: A method and apparatus for automatically separating blanks from a copper strip (200) and coining heat spreader lids (400) from the blanks. A high speed blanking structure (208) severs single rectangular or square blanks (212) from the copper strip. The blanks are loaded into a cartridge (214), and placed in a blanks hopper (213). The blanks are transferred from the hopper to a rotatable turret (217). The turret rotates to move a blank to a coining die cavity of a coining press (305). The blank is coined to form a lid and returned to the turret to be delivered to an unload station where the lid is dropped onto a conveyor (310). The conveyor transports the lid to a deburr and clean station (610).Type: GrantFiled: April 10, 2001Date of Patent: March 24, 2009Assignee: Honeywell International, Inc.Inventor: Russell J. Anderson
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Patent number: 7490503Abstract: The method according to the present invention comprises: a first curving step of curving a plate-like metallic blank (1) such that the blank (1) is convexed; a bending step of bending, with the outer peripheral edge portion (1e) of the blank (1) restrained from radially outwardly extending, the resulting arcuate portion (1b) of the curved blank (1) in the direction opposite to the convex direction thereof, so that a boss (6) is formed; and a second curving step of pushing the inner peripheral portion of a flat portion (5) of the blank (1) in the direction opposite to the boss projecting direction. Through the steps above-mentioned, the blank (1) is provided at the center thereof with the case-like boss (6) projecting in one direction from one lateral side of the blank (1) and at the outer periphery thereof with a peripheral wall (7) projecting in the same direction in which the boss (6) projects.Type: GrantFiled: August 15, 2000Date of Patent: February 17, 2009Assignee: Kanemitsu CorporationInventors: Toshiaki Kanemitsu, Kazuyuki Oda
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Patent number: 7415859Abstract: A method of forming blind holes in a sheet material is provided. The method includes forming a recessed segment in the sheet material, stamping the recessed segment between a tapered punch and a pad to form a blind hole having a sealed end and a sidewall, wherein the pad includes a profiling pin that is enclosed by the sealed end and the sidewall. The method further includes forming a material channel interposed between the tapered punch and a tapered die, and compressing the material channel to generate a material flow into the sidewall. The material channel may be narrowed to allow more material flow into the sidewall for additional sidewall thickness.Type: GrantFiled: November 30, 2005Date of Patent: August 26, 2008Assignee: Metalform Asia PTE Ltd.Inventors: Song Cheh Ser, Weng How Leong
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Patent number: 7367211Abstract: A forging device includes a die having an axis extending generally vertically. A work is placed in the die along the axis. First and second punches extend coaxially with the die and can interpose the work therebetween. A pressurizing section pressurizes the first and second punches toward the work generally simultaneously.Type: GrantFiled: April 11, 2006Date of Patent: May 6, 2008Assignee: Createch Co., Ltd.Inventor: Hitoshi Ishida
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Patent number: 7360387Abstract: To provide an upsetting method capable of efficiently expanding a bar-shaped raw material at least two portions. A plurality of guides 31 and 32 each having an insertion hole 34 are prepared. The bar-shaped raw material 1 secured to a fixed die 20 is inserted and held in each insertion hole 34 of the plurality of guides 31 and 32 in order. Then, a first exposed portion 4 of the raw material 1 exposed between a first guide 31 located at the foremost side of the plurality of guides 31 and 32 and the fixed die 32 is expanded in diameter by moving the plurality of guides 31 and 32 in a direction opposite to a moving direction of the punch 50R in a mutually adhering manner while pressurizing the raw material 1 in the axial direction with the punch 50R.Type: GrantFiled: January 31, 2006Date of Patent: April 22, 2008Assignee: Showa Denko K.K.Inventor: Atsushi Otaki
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Patent number: 7360388Abstract: A hollow stepped article is formed from a solid blank to reduce the material cost, and cracking is prevented in a stepped portion of large diameter when a portion of the blank is deformed by its radial expansion.Type: GrantFiled: November 29, 2006Date of Patent: April 22, 2008Assignee: Kubota Iron Works Co., Ltd.Inventors: Shigeaki Yamanaka, Takeshi Kazama, Masahiro Dohi
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Patent number: 7320240Abstract: A device, such as an inner race of a torque converter's overrunning clutch, is formed by powder metallurgy. The race includes oil grooves and chamfers formed in each face by forging. The oil grooves on the first face open onto the chamfer. The chamfer on the second face is interrupted at the oil grooves such that each oil groove opens onto the diametral surface. A forge assembly for forming the race includes a die assembly including a discontinuous lower chamfer tool, an upper punch including groove tools and a continuous chamfer tool, and a lower punch including groove tools and radially extending teeth disposed at the oil grooves and capable of extending into the gaps of the lower chamfer tool. A method for forming the race includes employing the die assembly to forge the oil grooves and chamfers into the preform and remove flash by conventional grinding processes.Type: GrantFiled: September 13, 2005Date of Patent: January 22, 2008Assignee: GKN Sinter MetalsInventor: Jack E. Pederson
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Patent number: 7191633Abstract: A forging apparatus has an upper die unit connected to an actuator for displacement in unison therewith, and a lower die unit confronting the upper die unit and mounted in a body assembly fixed to a foundation. An outer ring is guided axially by a plurality of guide pins for axial displacement on and along an outer circumferential surface of the lower die unit. The forging apparatus also has first ejector pins for removing a forged workpiece upwardly and second ejector pins for holding the workpiece when the upper die unit is displaced upwardly.Type: GrantFiled: November 22, 2005Date of Patent: March 20, 2007Assignee: Honda Motor Co., Ltd.Inventors: Yoichi Uehara, Takashi Kihara
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Patent number: 7171837Abstract: A hollow stepped article is formed from a solid blank to reduce the material cost, and cracking is prevented in a stepped portion of large diameter when a portion of the blank is deformed by its radial expansion.Type: GrantFiled: March 17, 2004Date of Patent: February 6, 2007Assignee: Kubota Iron Works Co., Ltd.Inventors: Shigeaki Yamanaka, Takeshi Kazama, Masahiro Dohi
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Patent number: 7171838Abstract: Method and apparatus for producing a thin walled tubular product with thickened flange. A first stage metalworking (drawing) of a circular plate material A is done by using a first die set 22 having a conical die 24 and a drawing punch 26 is done in a manner that the end of the blank plate is remained on the conical surface 24-1 of the die, so that a semi-finished tubular product A1 with a inclined flange A1-1 is obtained. Then, a second stage metalworking (drawing) of the semi-finished tubular product A1 is done by a second die set 32 having a shaping punch 34 and a restraint die 36. The semi-finished tubular product A1 is held by the restraint die 36 and the shaping punch 34 is introduced into the semi-finished tubular product A1 for effecting a wall thickness reduction under ironing principle while forming a stepped portion.Type: GrantFiled: May 19, 2004Date of Patent: February 6, 2007Inventor: Seiji Shiokawa
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Patent number: 7140269Abstract: 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: GrantFiled: May 16, 2003Date of Patent: November 28, 2006Assignee: Commerzbank AktiengesellschaftInventors: Manfred Arlt, Gerhard Subek, Thomas Franz, Christian Reimann, Otto Stock, Anton Eiberger
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Patent number: 7059165Abstract: The invention relates to a hydromechanical clamping device having two movable die halves and two punches, a first hydraulic piston, and a second hydraulic piston. The second die half is fixed to the frame and the second punch is arranged on the second hydraulic piston. The first hydraulic cylinder is connected to a third hydraulic cylinder. The latter acts on a fourth hydraulic piston. The first hydraulic cylinder is connected to the third hydraulic cylinder, so that the pressure medium displaced from the first hydraulic cylinder during a feed movement flows into the third hydraulic cylinder and the third hydraulic piston moves the fourth hydraulic piston in the feed direction, so that pressure medium is displaced into the second hydraulic cylinder, and the requisite forming pressure can be applied to the second hydraulic piston and the punches move toward one another.Type: GrantFiled: April 30, 2002Date of Patent: June 13, 2006Assignee: Hatebur Umformmaschinen AGInventors: Klaus Siegert, Aribert Schwager, Manfred Kammerer
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Patent number: 7013696Abstract: A method of making a flanged tubular metallic part by cold forging is provided. The method comprises a step of forming an axial depression in a blank and a flange forming step of making the depression axially deeper while causing a metal of the blank to flow radially outward thereby forming the blank into an intermediate product having a flange. The flange forming step includes axially moving an inner punch of a die assembly so as to cause a leading end of the inner punch to be positioned more forward than a backward side surface of the flange thereby causing the intermediate product to be formed with a sleeve portion that is position backward of the flange while allowing an outer punch of the die assembly to apply a biasing force to a backward side surface of the flange during formation of the flange.Type: GrantFiled: April 21, 2003Date of Patent: March 21, 2006Assignee: NGK Spark Plug Co., Ltd.Inventors: Minoru Ando, Shigahisa Saida
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Patent number: 7007536Abstract: A synchronizer sleeve adapted for use in a gear synchronizer mechanism of a power transmission, the synchronizer sleeve being formed at its inner periphery with inner spline teeth for meshing engagement to be meshed with a clutch gear of a change-speed gear train and inner spline teeth for synchronization positioned among the inner spline teeth for meshing engagement in a circumferential direction to be meshed with a synchronizer ring, wherein the inner spline teeth for meshing engagement and for synchronization are provided respectively at their one ends with a pair of chamfer surfaces formed by plastic deformation in a press-process, and wherein the inner spline teeth for synchronization are formed shorter in axial length than the inner spline teeth for meshing engagement. In the synchronizer sleeve, a ridge of each pair of the chamfer surfaces and an intersection of each of the chamfer surfaces and each tooth flank of the inner spline teeth are rounded off by plastic deformation in the press-process.Type: GrantFiled: August 14, 2003Date of Patent: March 7, 2006Assignee: Aisin Ai Co., Ltd.Inventor: Hitoshi Nakai
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Patent number: 6941782Abstract: A cold forging apparatus for forming complex shapes at a single station includes a pair of confronting multiple function punch assemblies disposed on a common axis. Each of the multiple function punch assemblies includes an inner or a center punch and an outer or ring-shaped punch surrounding and in sliding contact with the inner punch. The apparatus also includes a die holder for positioning a mass or slug of metal between the punches. A computer system controls movement of the punches and is programmable to form parts of different shapes at a single station.Type: GrantFiled: November 12, 2002Date of Patent: September 13, 2005Inventors: Ray Travis, Paul Stone
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Patent number: 6871524Abstract: The invention relates to a method for the manufacture of an annular article, which substantially consists of metal, ceramic material, and/or polymer. A cavity in a die is filled with a formable working material, which shall form said article. A tubular, upper punch (17) is introduced into the upper mouth of a hole in a die (34), so that a closed mould cavity is formed. The upper punch and a lower punch (27) are simultaneously struck towards one another at such a high velocity that the working material is plasticized and flows out and fills the mould cavity, and thereafter the upper punch is removed. Then, a mandrel (35) in the lower punch is driven out of the annular body by means of a mandrel expulsor (170), which is pressed against the mandrel from above, and thereafter the annular body is from below pushed out of the die by mean of the lower punch. The invention also relates to an equipment for the carrying out of the method.Type: GrantFiled: April 26, 2001Date of Patent: March 29, 2005Assignee: Morphic Technologies Aktiebolag (publ)Inventor: HÃ¥kan Olsson
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Patent number: 6862912Abstract: The invention concerns an impact machine for forming, cutting, or punching a working material in a mould die by impact action during an impact operation carried out by means of impact devices, preferably from two opposite directions, said impact devices being provided to strike the working material or impact members which transfer the impact energy of the impact devices to the working material, said die (9) being carried by a carrier (2) included in the impact machine. According to the invention, the die is resiliently mounted in the carrier, which e.g. may consist of a stationary or moveable table.Type: GrantFiled: November 16, 2001Date of Patent: March 8, 2005Assignee: Morphic Technologies Aktiebolag (publ)Inventor: HÃ¥kan Olsson
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Patent number: 6842982Abstract: By press-fitting a cylindrical blank into a die with one of a pair of punches, and at the same time press-fitting small diameter end portions and tapered portions of the pair of punches into both ends of the cylindrical blank while restraining both end surfaces of the blank with cylindrical members movable on the outsides of the punches, the external circumferential surface of the blank is finish molded to the required diameter by the internal circumferential surface of the die and, at the same time, tapered surfaces are formed on the inner circumferential surface in both ends of the blank. The process produces a bushing with its internal surfaces accurately coaxial, and with the external surface accurately formed to the required diameter.Type: GrantFiled: July 2, 2003Date of Patent: January 18, 2005Assignee: Tsubakimoto Chain Co.Inventors: Yusuke Haga, Toru Okabe, Nobuaki Haga
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Patent number: 6775908Abstract: A method of producing a cam lobe piece of an assembled camshaft in a valve operating system for an internal combustion engine. The method comprises (a) forming a profile of the cam lobe piece by upsetting a material under forging to obtain an intermediately formed body; (b) piercing a central portion of the intermediately formed body to form a shaft bore; and (c) ironing an inner peripheral surface of the pierced intermediately formed body to form unevenness at the inner peripheral surface, all accomplished by cold working. The material at the forming the profile of the cam lobe piece has a first section located on a side of a cam nose of the cam lobe piece, and a second section located longitudinally opposite to the first section. The material has a thickness which gradually increases in a direction from the second section to the first section.Type: GrantFiled: January 21, 2003Date of Patent: August 17, 2004Assignee: Nissan Motor Co., Ltd.Inventors: Yujiro Ohara, Hiroshi Takano
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Publication number: 20040129053Abstract: The invention relates to a hydromechanical clamping device having two movable die halves (M1, M2) and two punches (S1, S2), a first hydraulic piston (K1) being mounted in a displaceable manner in an axially movable first hydraulic cylinder (Z1), and a second hydraulic piston (K2) being mounted in a displaceable manner in a second hydraulic cylinder (Z2). The second die half (M2) is fixed to the frame and the second punch (S2) is arranged on the second hydraulic piston (K2). According to the invention, the first hydraulic cylinder (Z1) is connected to a third hydraulic cylinder (Z3), in which a third hydraulic piston (K3) is mounted. The latter acts on a fourth hydraulic piston (K4), which is guided in a fourth hydraulic cylinder (Z4).Type: ApplicationFiled: October 20, 2003Publication date: July 8, 2004Inventors: Klaus Siegert, Aribert Schwager, Manfred Kammerer
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Publication number: 20040112112Abstract: The invention relates to plastic working of metals, in particular, to a method of fabricating workpieces of metals and alloys by plastic deformation, including fabrication of long-length workpieces with a conditioned fine-grained structure, in particular, with a submicrocrystalline and nanocrystalline structure. The method enables the production of longitudinally laminated and internally reinforced workpieces, and can be utilized for processing workpieces from powdered metal components to obtain a solid article. The plastic deformation is performed by extrusion in an extrusion container using a shaping tool arranged in an extrusion channel, which directs the flow of metal and creates a combined intensive upsetting/shear/torsional plastic deformation pattern with simultaneous recovery of the workpiece cross-section area without impairing the continuity. The method reduces expenditures for processing workpieces owing to the use of commercially available equipment, e.g.Type: ApplicationFiled: October 6, 2003Publication date: June 17, 2004Inventors: Dmitry Evgenievich Glukhov, Vitaly Nikolaevich Golubev
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Patent number: 6735996Abstract: In a method of making an axle element for a motor vehicle, a rod-shaped semi-finished product of aluminum is use used as starting material and heated to a desired shaping temperature. A first end of the semi-finished product is upset in a cavity of a shaping die by means of a first punch. Subsequently, the other end of the semi-finished product is compressed in the cavity by a second punch, whereby compressed material is forced into a branch of the cavity to form a pre-forge part with a leg portion. The pre-forge part is then forged into a finished axle element, e.g. a swivel bearing.Type: GrantFiled: April 19, 2002Date of Patent: May 18, 2004Assignee: Benteler Automobiltechnik GmbHInventors: Michael Heussen, Bernard Comte, Vincent Von Niederhäusern, Andreas Baak
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Publication number: 20040089047Abstract: A cold forging apparatus for forming complex shapes at a single station includes a pair of confronting multiple function punch assemblies disposed on a common axis. Each of the multiple function punch assemblies includes an inner or a center punch and an outer or ring-shaped punch surrounding and in sliding contact with the inner punch. The apparatus also includes a die holder for positioning a mass or slug of metal between the punches. A computer system controls movement of the punches and is programmable to form parts of different shapes at a single station.Type: ApplicationFiled: November 12, 2002Publication date: May 13, 2004Inventors: Ray Travis, Paul Stone
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Publication number: 20040089048Abstract: A cold forging apparatus for forming complex shapes at a single station includes a plurality of multiple function punch assemblies disposed on intersecting axes. Each of the multiple function punch assemblies includes an inner or a center punch and an outer or ring-shaped punch surrounding and in sliding contact with the inner punch. The apparatus also includes a die holder for positioning a mass or slug of metal between the punches. A computer system controls movement of the punches and is programmable to form parts of different shapes at a single station. Off axis punches and angularly offset punches and an additional punch or punch assembly are also disclosed.Type: ApplicationFiled: November 5, 2003Publication date: May 13, 2004Inventors: Ray Travis, Paul Stone
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Patent number: 6698267Abstract: A method of forming a body of a formable working material in an impact machine, which comprises an upper impact unit (29 with an upper ram (14), an upper punch (17), a lower impact unit (3) with a lower ram (24), a lower punch (27), and mould cavity for the working material between the punches when the punches are brought towards one another, is characterized in that downwards movable masses, which comprise at least the mass of the upper ram and the mass of the upper punch, and upwards movable masses, which include at least the mass of the lower ram and the mass of the lower punch, are caused to move towards one another and towards the working material in the mould cavity, that the masses which move downwards, including the upper punch (17) obtain a downwards directed velocity (v1) and those masses which move upwards, including the lower punch (27), obtain an upwards directed velocity (v2), wherein the movable parts have such masses and the velocities are so high that the momentums of the downwards movable maType: GrantFiled: February 6, 2002Date of Patent: March 2, 2004Assignee: Morphic Technologies AktiebolagInventor: HÃ¥kan Olsson
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Publication number: 20040016281Abstract: The invention relates to a method and an apparatus for producing a workpiece with internal toothing, especially an internal geared wheel, by using a cup-like preform (N) with a substantially cylindrical side wall (N1) and a mandrel (5) with an external profile (6) according to the internal toothing to be produced, as well as with a forming tool which reduces the outside diameter of the cylindrical side wall during an advancing movement, as a result of which the material of the cylinder wall region flows into the external profile (6) of the mandrel (5). In accordance with the invention, the forming tool is configured as a drawing ring (14) ensuring the ironing of the cylinder wall region (N1) during an advancing movement and that two tool elements act upon the preform (N) during the ironing, which tool elements produce axial compressive stresses in the cylinder wall region (N1) of the preform.Type: ApplicationFiled: April 30, 2003Publication date: January 29, 2004Inventors: Aribert Schwager, Fritz Bley, Manfred Kammerer, Klaus Siegert
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Publication number: 20030005740Abstract: A fabrication method of a metal shell to be installed on a park plug is provided which is made up of a small-diameter portion, a large-diameter portion, and a wrapping portion. The wrapping portion is to be wrapped by staking about the spark plug to achieve installation of the metal shell on the spark plug. The method comprises pressing a workpiece with a punch to shape the wrapping portion of the metal shell in a first cold forging process and processing the workpiece to shape the small-diameter portion of the metal shell in a second cold forging process different from the first cold forging process. This produces the metal shell which is less susceptible to cracks when installed on the spark plug and has an increased service life.Type: ApplicationFiled: July 3, 2002Publication date: January 9, 2003Inventor: Kazuhiko Tanaka
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Patent number: 6490790Abstract: A preform for a connecting rod of an engine is manufactured with a good productivity. The preform has a large-end mass portion which corresponds to a large-end portion of the connecting rod, a small-end mass portion which corresponds to a small-end portion thereof, and a shaft portion which corresponds to a rod portion thereof. There is manufactured a preform blank which has a shaft-shaped portion which is formed by extrusion. This shaft-shaped portion is made up of the shaft portion and an extended portion which extends axially forward from the shaft portion. The small-end mass portion is formed by squeezing the extended portion in the axial direction in a plurality of times starting with a portion near the shaft portion.Type: GrantFiled: October 4, 2000Date of Patent: December 10, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Ryuji Soga, Shuichi Yamane, Hiroshi Sugita, Kimio Momose, Yoshiro Akiyama
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Patent number: 6460394Abstract: The method of manufacturing a heat exchanging fin is able to restrict forming wrinkles and ring marks in the heat exchanging fin. The method comprises the steps of: forming dome sections having diameters greater than the diameters of collared-through-holes and which are projected from one side face of a thin plate, and a plurality of circular recesses having diameters greater than of the dome sections, each of which encloses one of the dome sections, the circular recesses being depressed toward the opposite face of the thin plate; forming the dome sections and the recesses into truncated cone-shaped sections in a plurality of steps; forming a through-hole in each of the truncated cone-shaped sections; forming edges of the through-holes into collars; and forming a flange at a front end of each of the collars.Type: GrantFiled: March 26, 2001Date of Patent: October 8, 2002Assignee: Hidaka Seiki Kabushiki KaishaInventors: Shotaro Hidaka, Mamoru Yamada
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Patent number: 6415512Abstract: A method for surface processing of sintered oilless bearing and an apparatus thereof are disclosed by which method the efficiency of covering the pores and the surface roughness of protuberance that is nonporous surface may be improved by means of surface processing of inner diameter surface at time of sizing process using a correcting rod where many correction grooves have been formed on its top part.Type: GrantFiled: June 15, 2000Date of Patent: July 9, 2002Assignee: Samsung Electro-Mechanics Co., Ltd.Inventor: Dae Hyun Jeong