Class / Patent application number | Description | Number of patent applications / Date published |
072360000 | Coacting closed-dies | 7 |
20080229803 | HOLLOW RACK MANUFACTURING METHOD AND MANUFACTURING APPARATUS - 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. | 09-25-2008 |
20120324978 | Clinch Pin Fastener - A clinch-type fastener is formed by simultaneously creating an undercut during the same forging that creates the head and displacer of the fastener. A fastener blank is compressed end-to-end between top and bottom dies whereby the axial compression of a blank causes the outward bulging of the shank at its midline. Simultaneously, a tapered end point and a tangential interference band are formed provided by a curvilinear-shaped bulge in the shank. As the bulge is formed an undercut is created between the bulge and a shoulder which extends downwardly from a head of the fastener. This method of formation and the fastener produced thereby are particularly suited to the manufacture of small clinch pins having a diameter in the range of 1.0 mm. | 12-27-2012 |
20130111966 | METHOD FOR FORMING STEEL SHEET BY HOT PRESSING - Consumed energy is minimized to reduce running cost. Final formed products of uniform quality are successively obtained. High productivity is provided. A primary forming step of obtaining a primary formed product by plastically working a heated steel sheet with a primary forming die set for a predetermined time period, a secondary forming step of machining the primary formed product with the secondary forming die set for a predetermined time period to obtain a secondary formed product, and a hardening step of allowing a cooling die set placed in a hydraulic press controlled by a servomotor to hold the secondary formed product under pressure for a longer time period than the time period of each of the primary and secondary forming steps to obtain a hardened final formed product are successively performed in sequence. The hardening step is performed independently without coordinating with the primary and secondary forming steps. | 05-09-2013 |
20130247642 | FOUR-DIE FORGING DEVICE FOR FORGING PRESSES - Four-die forging device for forging presses can be employed to forge ingots and billets in a variety of steels and alloys on forging presses and is intended to provide for a longer repair-free service life of the device, a higher reliability, an increased forging process output and a better quality of forged parts. The holders ( | 09-26-2013 |
20130276504 | SUPPORT FOR A GRAIN BIN FLOOR AND METHOD OF MAKING THE SAME - A floor support for a grain bin floor made from a sheet of galvanized steel having a top surface, a bottom surface and flat ends. The floor support has a plurality of flanges and notches disposed within the top surface and a plurality of openings disposed through the sheet of galvanized steel. Positioned between each opening is a first bend. Positioned on either side of selected first bends is a second bend thereby forming a z-shaped floor support. | 10-24-2013 |
20130276505 | PRESS - A press including a number of pairs of dies each clamped by a driving source to press set work pieces in a vertical direction, and a revolver holding the pairs of dies and rotatable around a vertical axis, wherein the revolver by rotating moves any pair of dies to a pressing position where pressing process is performed. | 10-24-2013 |
20150314365 | APPARATUS FOR FORMING A BLANK FOR FINISH FORGING FOR A FORGED CRANKSHAFT FOR A THREE-CYLINDER ENGINE AND METHOD FOR MANUFACTURING A FORGED CRANKSHAFT FOR A THREE-CYLINDER ENGINE USING THE SAME - In a forming apparatus, journal dies hold and retain rough journal portions of a preform blank therebetween, and reference crank pin die and movable crank pin dies contact rough crank pin portions thereof. In this state, the journal dies and the movable crank pin dies are moved axially toward the reference crank pin die and the reference crank pin die and the movable crank pin dies are moved perpendicular to an axial direction. With this, rough crank arm portions are axially compressed to reduce their thickness to that of crank arms of a forged crankshaft, and the rough crank pin portions are pressed perpendicular to the axial direction to increase an amount of eccentricity to that of the forged crankshaft crank pins. Consequently, it is possible to form a blank for finish forging having a shape generally in agreement with a shape of the forged crankshaft for a three-cylinder engine. | 11-05-2015 |