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| Number | Title | Issue Date |
| 7690236 | Method and apparatus for hole punching A hole punching method capable of executing hole punching with high material yield at a low load and preventing occurrence of underfill is provided. The hole punching method includes a step of expanding a hole punching scheduled portion 2 of a raw material | 04/06/2010 |
| 7681428 | Forging method, forged product and forging apparatus 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 materia... | 03/23/2010 |
| 7673489 | Forging method, forged article and forging apparatus 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 ... | 03/09/2010 |
| 7415859 | Method and apparatus for forming blind holes in sheet material 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 th... | 08/26/2008 |
| 7368075 | Impact machine and a method of forming a body The invention concerns an impact machine for forming a body with desired shape of a formable working material through impact action in a forming operation, said impact machine comprising a machine stand (6), an upper unit which comprises either a lower impact... | 05/06/2008 |
| 7367211 | Forging device and method for forging work 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 an... | 05/06/2008 |
| 7360387 | Upsetting method and upsetting apparatus 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 fix... | 04/22/2008 |
| 7360388 | Hollow stepped shaft and method of forming the same 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. A hollow stepped shaft is formed by holding an upper ... | 04/22/2008 |
| 7320240 | Oil grooves formed in a race 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 ... | 01/22/2008 |
| 7194882 | Cold forging apparatus and method for forming complex articles 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-... | 03/27/2007 |
| 7191633 | Forging apparatus 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... | 03/20/2007 |
| 7171837 | Hollow stepped shaft and method of forming the same 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. A hollow stepped shaft is formed by holding an upper ... | 02/06/2007 |
| 7143624 | Forging apparatus and conveyor for forming complex articles A cold forging apparatus for forming complex shapes at a single station includes a first multiple function punch assembly having an inner and outer punch. A third punch or a second multiple function punch assembly is provided in a confronting relationship with the f... | 12/05/2006 |
| 7140269 | Gear wheel with a multiple helical toothing, pressed in one part, and a method and device for manufacturing the same 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... | 11/28/2006 |
| 7131311 | Method of and apparatus for forming forging blank When an actuator is operated, an upper die is displaced downwardly, pressing a lower surface of a workpiece against a forming surface. After the upper die is displaced upwardly, an ejecting member is displaced upwardly to push the workpiece upwardly by a lower die. ... | 11/07/2006 |
| 7090309 | Variable wall thickness trailer axles An axle assembly is provided having a varying wall thickness resulting in an axle assembly that is lightweight yet has sufficient strength and stiffness. The axle assembly includes a tube disposed about a longitudinal axis and having first and second end portions an... | 08/15/2006 |
| 7073365 | Linear drive metal forming machine The invention relates to a method and apparatus for forming metal containers. The method involves introducing a knockout element (110) into the container body through the open end, providing a forming die shaped to reduce the diameter of the sidewall of the c... | 07/11/2006 |
| 7059165 | Hydromechanical closing device, in particular for lateral extrusion 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 pist... | 06/13/2006 |
| 7036349 | Scallop output shaft tools A die for forming a work-piece having a complex geometry includes a die insert having an interior surface that defines a first portion of the complex geometry and a retainer ring that selectively engages the die insert. The retainer ring includes a circumferential i... | 05/02/2006 |
| 7013696 | Method of making a flanged tubular metallic part 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 radiall... | 03/21/2006 |
| 7007536 | Synchronizer sleeve used in power transmission and press-forming apparatus for the same 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 an... | 03/07/2006 |
| 7007537 | Clam shell system 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 in... | 03/07/2006 |
| 7000444 | Forging method and apparatus 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... | 02/21/2006 |
| 6993978 | Pin detection system A pin detection system and/or method for detecting a pin or bolt in a section of chain comprises a chain or section of chain having a plurality of chain links connected together by a plurality of pins or bolts or the like. At least one end of at least one of the pin... | 02/07/2006 |
| 6941782 | Cold forging apparatus and method for forming complex articles 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 ri... | 09/13/2005 |
| 6871524 | Method, impact machine, and equipment included in an impact machine 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 ... | 03/29/2005 |
| 6862912 | Impact machine 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 provid... | 03/08/2005 |
| 6842982 | Method of producing bushing 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 t... | 01/18/2005 |
| 6775908 | Production method of cam lobe piece of assembled camshaft 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 b... | 08/17/2004 |
| 6735996 | Method of making an axle element for a motor vehicle, and shaping die for carrying out the method 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 ... | 05/18/2004 |
| 6698267 | Method and impact machine for forming a body 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 t... | 03/02/2004 |
| 6490790 | Method of manufacturing preform for connecting rod 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 portio... | 12/10/2002 |
| 6460394 | Method of manufacturing heat exchanging fin and die set for manufacturing the same 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-hole... | 10/08/2002 |
| 6415512 | Method and apparatus for surface processing of sintered oilless bearing 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... | 07/09/2002 |
| 6357274 | Sparkplug manufacturing method A manufacturing method is provided that produces a tubular metallic shell for spark plugs. The metallic shell has a tapered part in the outer periphery to provide a seal. The tapered part can be formed into a desired shape by cold forging operation. A fir... | 03/19/2002 |
| 6349582 | Die system for full enclosed die forging A die system for full enclosed die forging with an enclosed cavity (1a, 2a) is formed between an upper die (1) attached to the side of a slide (6) and a lower die (2) mounted to the side of a bolster (17). A workpiece stock (7) disposed in the cavity is p... | 02/26/2002 |
| 6332347 | Apparatus for full-enclosed die forging An apparatus for full-enclosed die forging for forging a material into a workpiece having concavities on its opposite end surfaces including a first die provided on a stationary frame. A second die is provided on a movable frame which moves toward and awa... | 12/25/2001 |
| 6260400 | Full enclosed forging apparatus A full enclosed forging apparatus comprising a construction in which an upper die holder and a lower die holder are respectively disposed as to face a press machine, at least one of the upper die holder and the lower die holder is composed of a holder mai... | 07/17/2001 |
| 6250128 | Forging die and upset forging method An upset forging die device and method are provided for upset-forging a raw material that is being filled in a cavity of a lower molding die at a portion between an upper punch of an upper molding die provided on a slide and a lower punch of the lower mol... | 06/26/2001 |
| 5996229 | Method and mold die for forming a spiral bevel gear from metal powders A method and a mold die are provided for forming a spiral bevel gear from metal powders. The method includes the steps of: (a) providing a mold die having a die cavity that includes a middle segment corresponding to a contour of a spiral bevel gear, an up... | 12/07/1999 |
