| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 072358000 | Tool portion enters cavity of closed die | 16 |
| 20090107205 | Apparatus for Apertured Attachment of Metal Sheets - Apparatus attaches together stacked upper and lower metal sheets and provides a reinforced aperture. A lower die has a die groove and an opening in the center of the die groove. An upper die has an annular end face that registers with the die groove and a spring-loaded reciprocable punch button that registers with the opening. A hollow ring-shaped grommet has an annular upper end flange engaged by the annular end face of the upper die and an axially extending tubular wall longer than the stacked thickness of the sheets. A metal piercing point at the terminal end of the axially extending wall pierces through the stacked upper and lower sheets and into engagement with the die groove of the lower die to progressively bend the axially extending wall radially outward and upward into engagement with the lower sheet, thereby attaching the sheet together and providing a reinforced aperture. | 04-30-2009 |
| 20090293573 | Method of forging bevel gear - The present invention is a method of forging a bevel gear, comprising: a first forging step in which a first intermediate article is obtained by pressing a blank, such that there is formed a preliminary one-end recessed part that is axially recessed in an axis-center part on an axially one-end side and/or a preliminary other-end recessed part that is axially recessed in an axis-center part on an axially other-end side; a second forging step in which a second intermediate article is obtained by pressing the first intermediate article in a hermetically sealed cavity space defined by a first die and a second die that is positioned opposedly to the first die in the axial direction, such that there are formed: a body part including a tooth part on a radially circumference thereof and a one-end recessed part that is axially recessed in an axis-center part on the axially one-end side; and a projecting part projecting from a rear surface part of the body part on the axially other-end side; and a through-hole forming step in which a bevel gear having a through hole in an axis-center part is formed by removing the axis-center part extending from a bottom surface of the one-end recessed part to the projecting part of the second intermediate article. The tooth part provides a tooth-crest surface which is tapered from the axially other-end side to the axially one-end side, and upon completion of the second intermediate article in the second forging step, there remains an unfilled space between the projecting part of the second intermediate article and a wall surface of the dies defining the cavity space. | 12-03-2009 |
| 20090301165 | DEVICE FOR FORGING BUSH-SHAPED OBJECTS AND A FORGED PART PRODUCED THEREWITH - 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. | 12-10-2009 |
| 20100018280 | PRESS-WORKING METHOD, AND PRESS-WORKING APPARATUS - A press-working apparatus capable of forming a clear character line. The press-working apparatus forms a product having a character line. The press-working apparatus comprises an upper die and a lower die arranged across a steel sheet, an upper die mechanism for moving the upper die toward and away from the lower die, a first holder and a second holder for clamping the steel sheet and applying an unwrinkling force to the same, and a control unit for controlling the upper die mechanism and the first holder. The upper die is divided on the character line of the product into a first upper die and a second upper die. The control unit makes the unwrinkling force by the first holder stronger than that by the second holder, so that the steel sheet is press-worked by the second upper die and then by the first upper die. | 01-28-2010 |
| 20100236318 | PRESS-PROCESSING METHOD, AND PRESS-PROCESSING APPARATUS - This aims to provide a press process for drawing a plate material ( | 09-23-2010 |
| 20110016944 | METHOD OF PRODUCING METALLIC MEMBER - A method of producing a metallic member that reduces the burden on a mold during molding is provided. The method of producing the metallic member according to the present invention includes the step of forming a cup-like member by applying a load to a metallic plate member, and the step of forming a plurality of protrusions at an opening end portion of the cup-like member by placing the cup-like member into a mold. | 01-27-2011 |
| 20110016945 | METHOD AND APPARATUS OF FORMING TAILORED BLANK PLATE - A device for forming a tailored blank plate | 01-27-2011 |
| 20120144891 | Turbulizers and Method of Forming Same - Disclosed is a method of forming a heat exchanger turbulizer apparatus including a member having a longitudinal axis, a lateral width and a plurality of strips including first strips and second strips, each strip extending widthwise and being corrugated longitudinally so as to form a plurality of laterally spaced-apart sections connected to one another by bridges projecting from the sections in a common direction, the bridges of the first and second strips extending in the same direction and the corrugations of the second strips being offset laterally from the corrugations of the first strips. The method comprises: crimping longitudinally-corrugated strip material between first and second forming dies to form said apparatus, said dies being adapted such that substantially all lateral movement of strip material in crimping results from strip material being drawn laterally by material that has been displaced in a direction parallel to the direction of die movement. | 06-14-2012 |
| 20120216589 | PRETENSIONER AND PRETENSIONER MANUFACTURING METHOD - A pretensioner is provided, of which the cylinder, including a restriction portion, can be inexpensively formed, the cylinder having the restriction portion for positioning a gas generation unit to be mounted to a cylinder, and a pretensioner manufacturing method for manufacturing such a pretensioner is provided. In the pretensioner, since the cylinder is molded by forging, an inexpensive material compared with a stainless pipe member can be used for the molding. In addition, since the positioning portion can be molded during forging-molding for molding the entire cylinder, cost can be reduced even in this regard. | 08-30-2012 |
| 20120227459 | METHOD OF MANUFACTURING SHAFT MEMBER FOR WHEEL ROLLING BEARING DEVICE - According to a method of manufacturing a flanged shaft member having a plurality of flanges used to fasten the shaft member to a wheel, when the flanges are formed on a part between a shaft portion and a fitting shaft portion through lateral extrusion while a forged recess is formed at a center of an end surface of the fitting shaft portion with the use of a forging die apparatus for cold forging, each flange is formed so as to be curved in a direction opposite to a direction, in which the flange warps due to springback caused after the lateral extrusion, by an amount corresponding to an amount of warpage due to the springback. | 09-13-2012 |
| 20120279273 | MANUFACTURING METHOD OF PRESS PRODUCT AND PRESS FORMING APPARATUS - A product including a top surface part, a vertical wall part connected to an end of the top surface part and a corner part interposed between the top surface part and the vertical wall part is manufactured by flowing a material of the corner part toward the top surface part while applying a pressing force on a workpiece. | 11-08-2012 |
| 20140331733 | TORSIONAL EXTREME-PLASTIC PROCESSING METHOD OF CONIC METAL PIPE - The present invention relates to a torsional extreme-plastic processing method. In other words, a processing method in which severe plastic deformation based on torsion and compressive force is applied to a material by using a mold to produce miniaturize and nano-size crystal particles in a conic pipe. According to the severe plastic deformation method of the present invention, a punch that matches an inner shape of the conic metal pipe is mounted inside the conic metal pipe, and then a mold that matches an outer shape of the conic metal pipe is mounted outside the conic metal pipe. Thus, microstructures of the conic metal pipe may be ultra-finely crystallized or nano-crystallized through shearing by applying compression and torsion to the conic metal pipe. | 11-13-2014 |
| 20160001349 | IRONING MOLD AND FORMED MATERIAL MANUFACTURING METHOD - An ironing mold according to the present invention includes a punch that is inserted into a formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction. | 01-07-2016 |
| 072359000 | With telescoping engagement | 3 |
| 20090064751 | Pressing System - Apparatus for pressing blanks in a coining, stamping or press forming operation includes a rotary pressing table to which the blanks are fed, a store receptacle for the blanks and a feed system for feeding the blanks dispensed from the store receptacle to the rotary pressing table. The feed system has a guide conduit into which the blanks pass following dispensing from the store receptacle and along which the blanks are urged to file one behind another to an exit from the guide conduit. The blanks pass directly from the conduit into a receiving station of the rotary pressing table. | 03-12-2009 |
| 20120090375 | ZONING CLOSED-DIE EXTRUDING DEVICE AND METHOD - A zoning closed-die extruding device comprises a closed female die and a male die. which is disposed in a longitudinal direction and configured to be mated with a closed cavity of the closed female die to extrude a blank. The male die comprises an extruding shaft portion and a stamp-extruding head portion, which is connected with the extruding shaft portion and disposed below the extruding shaft portion. A cross-sectional area of the stamp-extruding head portion perpendicular to a longitudinal axis of the closed female die is smaller than that of the extruding shaft portion perpendicular to the longitudinal axis of the closed female die. The male die is configured to rotate about the longitudinal axis of the closed female die so that the blank is sequentially and zonally deformed by the stamp-extruding head portion inside the closed cavity of the closed female die. | 04-19-2012 |
| 20150352628 | Drawing Die With Lower Die Provided With Microstructures - A drawing die with a lower die provided with microstructures is provided, including a lower die. The lower die is secured on a lower die holder, coordinates with a blank pressing plate to clamp a board and performs drawing processing on the board by using a punch moving relative to the lower die, where a top working surface, a shoulder surface, and a die cavity side wall surface of the lower die include multiple microstructures sunken into the surfaces, or a surface, which touches the board when drawing is performed, of the lower die includes multiple microstructures sunken into the surface. | 12-10-2015 |
