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ES280827A1 - Fluted lobular thread-forming members - Google Patents

Fluted lobular thread-forming members

Info

Publication number
ES280827A1
ES280827A1 ES0280827A ES280827A ES280827A1 ES 280827 A1 ES280827 A1 ES 280827A1 ES 0280827 A ES0280827 A ES 0280827A ES 280827 A ES280827 A ES 280827A ES 280827 A1 ES280827 A1 ES 280827A1
Authority
ES
Spain
Prior art keywords
lobular
fluted
thread
blank
radius
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES0280827A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Textron Industries Inc
Original Assignee
Textron Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Textron Industries Inc filed Critical Textron Industries Inc
Publication of ES280827A1 publication Critical patent/ES280827A1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G7/00—Forming thread by means of tools similar both in form and in manner of use to thread-cutting tools, but without removing any material
    • B23G7/02—Tools for this purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/10—Making helical bodies or bodies having parts of helical shape twist-drills; screw-taps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/48—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools threading tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

A fluted thread forming member, such as a tap 15, for swaging threads in a parent body, is produced by extruding a blank 37 from wire stock to form a shank portion 18 which includes an odd number of flutes, the resulting convex tubular parts of the shank then being rolled between dies to form a thread. The radius of the resulting lobular threaded portions is smaller than the distance 43, Fig. 5, between the tip of a lobular portion and the work axis. Similarly, the radius of curvature of the roots is less than the distance between the axis and the root. A ram 61, Fig. 8, movable in a housing 49, forces the shank portion of the blank through a shaped die 53, an ejector 37 also being provided, and the subsequent rolling takes place between flat or curved dies.
ES0280827A 1961-09-15 1962-09-15 Fluted lobular thread-forming members Expired ES280827A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US138478A US3209383A (en) 1961-09-15 1961-09-15 Fluted lobular thread-forming members

Publications (1)

Publication Number Publication Date
ES280827A1 true ES280827A1 (en) 1963-02-01

Family

ID=22482195

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0280827A Expired ES280827A1 (en) 1961-09-15 1962-09-15 Fluted lobular thread-forming members

Country Status (4)

Country Link
US (1) US3209383A (en)
BE (1) BE621925A (en)
ES (1) ES280827A1 (en)
GB (1) GB1012741A (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263533A (en) * 1964-08-27 1966-08-02 Textron Ind Inc Screw extractor
FR1556730A (en) * 1967-06-05 1969-02-07
USRE28907E (en) * 1967-06-05 1976-07-20 Self-tapping threaded bushings
US3866510A (en) * 1967-06-05 1975-02-18 Carl B H Eibes Self-tapping threaded bushings
US3434168A (en) * 1967-09-26 1969-03-25 Maynard Mfg Co Method of making a lobular threaded fastener
US3492908A (en) * 1969-01-17 1970-02-03 Microdot Inc Thread swaging screw or bolt
US4161132A (en) * 1975-06-05 1979-07-17 Bulten-Kanthal Aktiebolog Self-tapping screw
US4069730A (en) * 1976-06-03 1978-01-24 Wales-Beech Corporation Thread-forming screw
US4235149A (en) * 1978-08-17 1980-11-25 Veldman Donald R Self-thread creating fastener and method and apparatus for making the same
US4315340A (en) * 1978-08-17 1982-02-16 Veldman Donald R Method and apparatus for making a self-thread creating fastener
US4724694A (en) * 1984-07-05 1988-02-16 The Fastron Company Method of manufacturing a thread-forming screw
JPS62251513A (en) * 1986-04-23 1987-11-02 レツクスノ−ド・インコ−ポレ−テツド Burying fitting
FR2610555A1 (en) * 1987-02-05 1988-08-12 Rineau Freres Outillage Armor Tap with improved guidance
JP3046746B2 (en) * 1995-06-14 2000-05-29 ミネベア株式会社 Screw and screw manufacturing method
US5961267A (en) * 1998-06-23 1999-10-05 Textron Inc. Thread forming fastener
US20040228705A1 (en) * 2003-05-16 2004-11-18 Abbott-Interfast Corporation. Fasteners for composite material
US7144208B2 (en) * 2004-06-07 2006-12-05 Kennametal Inc. Low torque tap
US8858144B2 (en) * 2007-03-06 2014-10-14 Dale E. Van Cor Threaded fastener and fastener system
DE102007036733A1 (en) * 2007-08-03 2009-02-05 Newfrey Llc, Newark Threaded bolt and method for its production
US7988396B2 (en) * 2007-10-11 2011-08-02 Handy & Harman Deck screw
DE102009000891B4 (en) * 2009-02-16 2019-09-19 Hilti Aktiengesellschaft Method and threading tool, each for shaping an internal thread on a base body
DE102014112165A1 (en) * 2014-08-26 2016-03-03 EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik für Präzisionswerkzeuge Thread forming tool, in particular thread rolling
DE102014112164A1 (en) * 2014-08-26 2016-03-03 EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik für Präzisionswerkzeuge Threading tool with gothic thread profile and method of making such a thread forming tool

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1048921A (en) * 1912-02-19 1912-12-31 Frederic E Wells Die-blank.
US2656740A (en) * 1950-11-20 1953-10-27 Emma G Bedker Method of making thread cutting taps
US2703419A (en) * 1951-03-06 1955-03-08 Barth Corp Method and tool for swaging internal threads
US2787798A (en) * 1952-11-26 1957-04-09 Rosan Joseph Swaging tool for reconditioning deformed lock threads
USRE24572E (en) * 1956-04-03 1958-12-02 Fluteless swaging tap
AT210236B (en) * 1958-07-29 1960-07-25 Strojirny A Slevarny Bohumira Taps
US2991491A (en) * 1958-11-21 1961-07-11 Besly Welles Corp Fluteless swaging tap with sizing area increasing at a constant rate

Also Published As

Publication number Publication date
BE621925A (en)
US3209383A (en) 1965-10-05
GB1012741A (en) 1965-12-08

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