子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Apparatus and method for forming screw-thread on a pipe | US09417972 | 1999-10-13 | US06237389B1 | 2001-05-29 | Minoru Tada; Mikio Morinaga |
| In an apparatus and a method for forming threaded portions around a metal pipe with accuracy and ease, a preliminary forming is performed so as to recess portions of the metal pipe a little bit inwardly in the radial direction thereof by advancing auxiliary forming punches while keeping main forming punches as they are. Thereafter, by receding the auxiliary forming punches back, while advancing the main forming punches, simultaneously, the threaded portions are formed on outer periphery of the metal pipe 3 shifted by 180° in phase thereof. | ||||||
| 182 | Method of forming a fastener | US922232 | 1997-09-02 | US6017274A | 2000-01-25 | Russell G. Sherman; H. Thomas Patton |
| In a first embodiment, a method for forming a hardened fastener having a hardened fastener head. Alloys made of cobalt, nickel, chromium, and molybdenum have very high hardnesses while maintaining ductility. Metals conforming to the chemistry of AMS 5844 and AMS 5842 are disclosed as the preferred materials. These hardnesses are also maintained at high temperatures. In order to form a head upon such materials, a fastener blank is first initially hardened by cold reduction twenty to thirty percent (20%-30%). A fastener head is then formed in the fastener blank by additional cold forging. The remaining shank portion of the fastener blank is cold worked in a third process with the entire three-part cold forging process cold reducing the material forty-eight to fifty percent (48%-50%). Additional hardness may be obtained by heating the material in a temperature range between ca. 1200.degree. F. and 1300.degree. F. In another embodiment, the head may be hot forged for otherwise unworkable materials or alternative hardening techniques may be used prior to cold forging the fastener head. A fastener so formed by the methods set forth herein is also contemplated as being within the scope of the present invention. In still another embodiment a nickel-based alloy is preliminarily heat treated to 180,000 psi and thereafter cold worked using the method of the invention to obtain a high strength fastener. | ||||||
| 183 | Thread formation | US687451 | 1996-10-03 | US5776001A | 1998-07-07 | Nigel Carter |
| The invention relates to thread formation and particularly to the formation of threads on deformed steel reinforcing rods. The method of forming a thread on the steel reinforcing rod comprises the steps of cold upsetting an end region (1) of a deformed steel reinforcing rod having a nominal diameter, the upsetting being arranged to increase the diameter of the end region to a new, upset, diameter greater than the nominal diameter, rolling a thread onto the end region (1) so as to produce a threaded region having a thread major diameter which is greater than the nominal diameter and a thread minor diameter which is less than the nominal diameter. The formation of such a thread enables the production of mechanical connections between pairs of rods, the connections having a strength greater than that of the rods being connected to one another. | ||||||
| 184 | Method of producing a rear wheel spindle | US527072 | 1995-09-12 | US5689882A | 1997-11-25 | Shigemitsu Adachi; Kazuo Nakagawa; Kiyoaki Tanidono; Masaharu Tsuboi |
| A method of producing a spindle that can be easily press fit into a knuckled suspension arm with high productivity. A round bar is forged by a header to form a work in process part which is, in turn, thermally refined. If necessary, shot blast and lubrication are applied to the exterior surface of the work in process part. Subsequently, by rolling the work in process part, screw threads are formed on a male screw portion. The work in process part is set and finished in a press. The peripheral surfaces of the bearing attachment portion as well as the knuckle press fit portion of the work in process part are finished in a press. Since the surface of the knuckle press fit portion of the spindle is formed or extruded in the press, the portion can be easily press fit into a knuckled suspension arm with little resistance. The method of producing the spindle obviates the necessity of machining and grinding thereby providing enhanced productivity. | ||||||
| 185 | Method of making a bolt and washer assembly | US829496 | 1992-02-03 | US5308285A | 1994-05-03 | Gerald Malen; William Deason; Joseph Muschella |
| A method for fabricating a fastener and washer assembly wherein the washer is permanently retained on the fastener by an annular raised portion on the shank of the fastener. The annular raised portion and the inner diameter of the washer are mutually formed so as to promote elastic deformation of both the raised portion and the washer when the washer is forced over the raised portion to be retained on the fastener. The method allows the fastener and the washer to be fully fabricated and processed prior to assembly, including such desirable steps as heat treating and plating of both the fastener and the washer. The annular raised portion is formed by a pair of converging annular surfaces which define a predetermined diameter. The washer has an inner diameter surface having a pair of chamfered edges. The washer is assembled onto the shank of the fastener by forcing the chamfered edge of the washer against and past the annular raised portion. the inner diameter is sized relative to the diameter of the annular raised portion such that it is elastically, and not plastically, expanded while the annular raised portion is elastically compressed as the washer is forced over the annular raised portion. Thereafter, both the washer and the annular raised portion elastically revert back to their respective diameters. The washer is permanently retained on the fastener by the raised portion to form the fastener and washer assembly. | ||||||
| 186 | Device for securing dies on threading machines | US856451 | 1992-03-24 | US5203874A | 1993-04-20 | Manuel Azkona-Ollacarizqueta |
| The device uses a diaphragm cover between the adapter and the die to lock the die into the adapter. The cover is rotatably mounted onto the adapter and has a polygonal bore that matches the polygonal bore of the adapter. The mandrel of the die has a throat in which the cover sits when the cover is in the locked position. The cover is biased with a spring into the locked position. Stops are provided to limit the movement of the cover between the open and closed positions. | ||||||
| 187 | Threaded fastener having minimized length and weight and method to make it | US118524 | 1987-11-09 | US4957401A | 1990-09-18 | Edwin E. Hatter |
| A threaded fastener has a pin with a head, a cylindrical shank, a shoulder with reducing diameter, a radius at the least diameter of the shoulder whose region is work-hardened, and a threaded end, in that order. The thread extends into near-adjacency to the shoulder, and has no more than approximately one-half of a convolution of an incomplete thread at its end adjacent to the shoulder. A collar is threadable onto the thread. It has a counterbore no longer than the anticipated grip range plus approximately one-half of a thread pitch. The collar may be inherently torque-limited. The term "thread" also includes a peripheral groove. | ||||||
| 188 | Apparatus for on line, random sample, inspection of cold-formed blanks for threaded fasteners | US622752 | 1984-06-20 | US4557125A | 1985-12-10 | Theodore R. Schaumburg |
| An improved apparatus for on-line inspection of an intermediate-stage, headed, non-threaded blank for a threaded fastener is disclosed. If the blank fails to meet specifications, the production of blanks is terminated. Improvement features include a roll-sorter for testing all blanks to see if certain dimensional parameters of the blank's head are satisfied. Then, random chosen acceptable blanks are fed to a rotatable table which is constructed to receive a sample blank for movement of the blank to a test station where the blank is tested for other failures to meet dimensional specifications. The rotatable table is constructed to provide interchangeable elements thereof that will accept blanks of different head and stem sizes. Multiple adjustability is provided in the means for transferring blanks, that are first acceptable to the roll-sorter test, on to the rotatable table for further testing. | ||||||
| 189 | Threaded fastener having minimized length and weight and method to make it | US338249 | 1982-01-11 | US4485510A | 1984-12-04 | Edwin E. Hatter |
| A threaded fastener has a pin with a head, a cylindrical shank, a shoulder with reducing diameter, a radius at the least diameter of the shoulder whose region is work-hardened, and a threaded end, in that order. The thread extends into near-adjacency to the shoulder, and has no more than approximately one-half of a convolution of an incomplete thread at its end adjacent to the shoulder. A collar is threadable onto the thread. It has a counterbore no longer than the anticipated grip range plus approximately one-half of a thread pitch. The collar may be inherently torque-limited. The term "thread" also includes a peripheral groove. | ||||||
| 190 | Shear-resistant captive screw | US3746067D | 1971-12-15 | US3746067A | 1973-07-17 | GULISTAN B |
| A captive screw including a sleeve having a bore substantially complementarily receiving a relatively large diameter portion of the shank of a screw inwardly of the screw head, with an annular enlargement on the shank, of greater diameter than the bore, being located at the end of this shank portion and retaining the screw to the sleeve. Beyond the annular enlargement, the shank is provided with an annular groove and rolled threads on its outer end. The sleeve includes a head at one end and an enlarged bore portion at the opposite end providing a relatively thin wall adapted to be bent outwardly to secure the sleeve to a workpiece.
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| 191 | Method of thread rolling | US3590409D | 1968-11-04 | US3590409A | 1971-07-06 | BERGERE EMRIC W |
| A method of forming threads on ultra high strength metal alloys by preforming the threads in the annealed condition while allowing a segment of material below the pitch diameter to be compression cold rolled after heat treatment especially at the root radius. Thread forming at Rockwell C50 to C65 hardness greatly reduces the life of thread rolls. This method entirely overcomes this failure while maintaining the required tensile fatigue life of the bolt threads.
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| 192 | Method of forming thread rolling die | US3561297D | 1969-05-06 | US3561297A | 1971-02-09 | WILKINS OREN C |
| ACCORDING TO THE PRESENT INVENTION A UNIQUE ROLL DIE IS FORMED BY CUTTING PROTRUSIONS ON THE DIE, AND THE DIE PRODUCED MAY BE EITHER IN THE ROUND OR IN THE FLAT FORM. IN THE ROUND FORM THE PROTRUSIONS ARE HELICAL AND IN THE FLAT FORM THEY ARE PARALLEL, SUBSTANTIALLY STRAIGHT, AND SLANTED. THE PROTRUSIONS IN THE DIE ARE FORMED WITH FIRST PROTRUSION MEANS DISPOSED IN A NOMINAL FACE HAVING A GENERATOR PARALLEL TO A DIE AXIS. THE FIRST PROTRUSION MEANS HAS LEADING AND LAGGING FLANKS. SECOND PROTRUSION MEANS IS ALSO INCLUDED, WHICH IS CUT INTO THE DIE AND IS DISPOSED IN A NOMINAL FACE OBLIQUE TO THE DIE AXIS. THE SECOND PROTRUSION MEANS ALSO HAS LEADING AND LAGGING FLANKS, AND THEY ARE PARALLEL, RESPECTIVELY TO THE LEADING AND LAGGING FLANKS OF THE FIRST PROTRUSION MEANS. THUS, THE FIRST PROTRUSION MEANS IS DISPOSED GENERALLY PARALLEL TO THE SECOND PROTRUSION MEANS, AND THE SECOND PROTRUSION MEANS RECEDES FROM THE FIRST PROTRUSION MEANS AND TOWARD THE AXIS, BUT BOTH ARE COMPATIBLE WITH A THREAD WHICH IS FORMED BY BOTH OF THEM.
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| 193 | High fatigue bolt thread | US3433117D | 1967-06-05 | US3433117A | 1969-03-18 | GOWEN EDWARD F JR; OLLIS RAYMOND JR; WALKER RICHARD A |
| 194 | Thread rolling dies and methods of making them | US23637262 | 1962-11-08 | US3327569A | 1967-06-27 | PRUTTON HOWARD D |
| 195 | Thread forms | US49415065 | 1965-10-08 | US3323402A | 1967-06-06 | GOWEN JR EDWARD F; OLLIS JR RAYMOND; WALKER RICHARD A |
| 196 | Method of producing chromised screws | US3118224D | US3118224A | 1964-01-21 | ||
| 197 | Method of making thread rolling dies | US47378043 | 1943-01-28 | US2324143A | 1943-07-13 | ERDMAN HARVEY C |
| 198 | Process of making plug gauges | US28796939 | 1939-08-02 | US2243608A | 1941-05-27 | SCHAURTE WERNER T |
| 199 | Thread forming mechanism | US15232837 | 1937-07-07 | US2183689A | 1939-12-19 | OLSON CARL G |
| 200 | 異形鉄筋のねじ式鉄筋継手およびその製造方法 | JP2016201748 | 2016-10-13 | JP2018062792A | 2018-04-19 | ▲脇▼山 廣三; 平井 敬二; 福田 章 |
| 【課題】生産性に優れ、かつ雄ねじ部の加工による耐力低下の実用上の問題が生じず、必要な耐力が得られる異形鉄筋のねじ式鉄筋継手およびその製造方法を提供する。 【解決手段】鉄筋本体1aの外周に突条1bを有する異形鉄筋である一対の鉄筋1,1を相互に接続する鉄筋継手である。両鉄筋1,1の雄ねじ部1c,1cに螺合する筒状のカプラー2を備える。各鉄筋1の雄ねじ部1cは、ねじ溝径D3が鉄筋本体外径D1よりも細く、ねじ山径D32、D32′が鉄筋本体外径D1よりも太くかつ最大径D2よりも細い。この雄ねじ部1cの硬さは、転造によるねじ形成に伴う加工硬化により、鉄筋1の他の部分よりもよって硬くなっている。ロックナットをさらに設けても良い。 【選択図】図1 |
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