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JP4366044B2 |
A twist drill including a spiral-forming hollow shaft (3) having a spiral-shaped inner surface, and drilling head(5) and shank (6) connected with the shaft (3) at its opposite ends, respectively; and a method for forming such a twist drill.
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JP4367833B2 |
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JP4368533B2 |
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JP2009539041A |
Disclosed is a screw for hard wood, comprising a screw tip (3) with two cutting edges (5) that extend approximately parallel to each other and perpendicular to the longitudinal axis of the screw. The cutting angle of the cutting edges am...
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JP2009257482A |
To provide a rolling tool capable of accurately and economically manufacturing a screw thread in a shape of capable of exhibiting a locking function.A rolling die 1 is provided with a second die 20 having a plurality of fitting part work...
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JP4357093B2 |
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JP4357079B2 |
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JP4356910B2 |
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JP4356644B2 |
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JP2009241130A |
To prevent the generation of a projecting part, such as burr, when the outer circumferential part of a disk-like blank is formed with increased thickness.When a roller 34c for increasing the thickness is approached up to the die-closing ...
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JP2009242837A |
To provide a copper alloy cast billet with which the productivity is further improved by reducing a tool wearing in tube making while holding the processing facility in the production of a copper alloy tube and the productivity; and the ...
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JP4346121B2 |
A machine for hard-rolling a workpiece such as a crankshaft includes a drive apparatus (7) for rotating the crankshaft (8, 113), suspension apparatuses (9 to 17), hard-rolling devices (18 to 26, 111) movably supported by the suspension a...
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JP2009233705A |
To restrain the generation of an imperfect screw part and form-rolling-over to the minimum limit, when a male-screw is manufactured by form-rolling.Firstly, in the first process, a small diameter part 95b and a chamfer part 95a connected...
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JP2009536099A |
A method for processing a preform for a rim wherein a ring-shaped rudimentary metal rim edge (5) is clamped in a slit (13) moving along the circumferential edge of the rim edge (5) between a profiled outer surface (8) of a mandrel (7) an...
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JP4340855B2 |
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JP4340854B2 |
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JP4340754B2 |
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JP4336274B2 |
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JP2009214152A |
To provide a flat die for roll-forming with which even in the case of finely tilting the positional relation of one pair of the flat dies, a strain caused by the elastic-returning of the flat dies for roll-forming is prevented without sa...
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JP2009214880A |
To eliminate a preparatory process for forming a hollow section and facilitate manufacture of a wheel, in a method of manufacturing a vehicular wheel made of a light alloy and having an annular hollow section on an outer rim.The manufact...
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JP2009214153A |
To provide a thread rolling apparatus and a thread rolling method adequately ready for the change of the number of revolutions of a roll die to the load fluctuation of the roll die on a thread-rolled workpiece, and capable of enhancing t...
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JP2009208135A |
To provide a method for manufacturing a semifinished product for a ring-shaped holder of a needle roller bearing, which can realize a high dimensional accuracy in cold rolling to eliminate insufficient filling of a steel material into a ...
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JP2009208119A |
To suppress a screw thread of a female screw and formed tooth provided in a screwing part from being deformed in an early stage of forming the female screw when the female screw is formed on the inner peripheral surface of a lower hole b...
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JP2009202221A |
To provide a flat die for rolling working, with which strain due to elastic return of the flat-die for rolling working in a biting inclined tooth part is prevented and tooth-shape working precision including highly precise accumulated pi...
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JP2009197899A |
To provide a double-row angular bearing having an improved rolling life and reduced costs.The double-row angular bearing comprises inner rings 24A, 24B having inside rolling surfaces 28, 29 on the outer diameter faces, respectively, an o...
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JP2009195930A |
To provide an infeed form rolling die with which working of a screw shaft in which the balls are prevented from falling off is easily performed and the screw shaft of a ball screw mechanism which is formed with the die.The balls 3 can pa...
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JP4322067B2 |
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JP4319501B2 |
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JP4319425B2 |
A metal ring with smaller stress concentration is manufactured, and the manufacture and maintenance of a rolling roller for transferring a mesh-shaped unevenness to the metal ring is facilitated. A mesh-like unevenness 8 is formed to the...
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JP2009180268A |
To provide a rolling bearing for a pump for preventing pollution of cooling water, and improving durability.An inner ring 8 and an outer ring 7 are formed of a steel pipe material having rust preventive capacity by cold rolling processin...
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JP2009180360A |
To provide a tapered screw member for securing the area of the end face of a tapered portion for improved sealing performance while holding the strength of the end of the tapered portion, and to provide its manufacturing method for easil...
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JP4310295B2 |
A rolling die (1) is provided for forming a rod member with a ball portion. The rolling die includes a first die member (1a) and a second die member (1b) facing the first die member (1a). Each of the first die member and the second die m...
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JP2009166111A |
To improve productivity by making the male-screw of a screw-in part by thread-rolling, and to secure suitable outer diameter size in a bolt main body and the screw-in part.In an anchor bolt to be fitted to an existing concrete skeleton a...
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JP2009166088A |
To provide a plastic working method and its apparatus by which the plastic working is performed without bulging the surface of a disk to the side of a pressurizing member and deforming the flange part of the outer side.In the plastic wor...
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JP4299538B2 |
A method of reducing slot width in slotted tubular liners. A slotted tubular liner ( 1 ) is provided having an interior surface ( 3 ), an exterior surface ( 2 ) and a plurality of slots ( 4 ) extending between the interior surface and th...
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JP4292743B2 |
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JP4285008B2 |
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JP4284207B2 |
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JP2009131874A |
To provide a method of manufacturing a ring product, for example, an inner-ring race of a bearing by making fiber flow coincide with a wide annular recessed groove when forming the wide annular recessed groove in the outside diameter par...
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JP2009131864A |
To provide a thread rolling flat die which is easily detached from the fixing surface of a thread rolling machine after forming threads by rolling.An air injection port 12 is provided on the pressing surface of the tread rolling flat die...
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JP2009131865A |
To provide a thread rolling flat die which is easily detached from the fixing surface of a thread rolling machine after forming threads by rolling.Grooves 21, 22 are respectively provided along the longitudinal direction of the die body ...
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JP4278965B2 |
To provide a wire rod forming machine for which it is possible to increase the production speed above that of the prior art. In the ring-forming machine 10 of the present configuration, between the respective edges 42 and 51 of the movin...
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JP4272407B2 |
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JP4269349B2 |
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JP4266631B2 |
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JP4257742B2 |
To provide a method for manufacturing a copmonent having a drum shape by a cold plastic working by which the copmonent is made light in weight without requiring a secondary working. In the method for manufacturing the drum-shaped copmone...
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JP4255991B2 |
An annular workpiece 6 is rolled between two oppositely disposed forming rolls 2, 4, and two oppositely disposed growth rolls 22 and 24 acting at right angles to the line of action of the forming rolls. The forming rolls 2, 4, are brough...
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JP4246310B2 |
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JP4245944B2 |
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JP4245943B2 |
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