US2513864A - Screw-thread die - Google Patents

Screw-thread die Download PDF

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Publication number
US2513864A
US2513864A US733628A US73362847A US2513864A US 2513864 A US2513864 A US 2513864A US 733628 A US733628 A US 733628A US 73362847 A US73362847 A US 73362847A US 2513864 A US2513864 A US 2513864A
Authority
US
United States
Prior art keywords
die
thread
recesses
screw
face
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 - Lifetime
Application number
US733628A
Other languages
English (en)
Inventor
Haycock Harold James
Wilson Harold Georg Carmichael
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2513864A publication Critical patent/US2513864A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B23G5/00—Thread-cutting tools; Die-heads
    • B23G5/02—Thread-cutting tools; Die-heads without means for adjustment
    • B23G5/04—Dies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/904—Tool or Tool with support with pitch-stabilizing ridge
    • Y10T408/9046—Tool or Tool with support with pitch-stabilizing ridge including tapered section
    • Y10T408/90473—Tool or Tool with support with pitch-stabilizing ridge including tapered section including work-embracing cutting edges

Definitions

  • the present invention relates to screw thread dies especially high precision dies such as are used in forming or cutting screw threads on cylindrical parts.
  • dies of the kind referred to and as at present used are provided with a number of lateral grooves or flutes extending the whole length of the operative or thread forming part of the die, the number of such flutes varying according to the size of the die.
  • Such dies may or may not be chamfered at the leading end to form a lead.
  • tion 1 aforesaid is instrumental in directing the swarf away from the corresponding cutting edge 9 to the peripheral edge of the die and also instrumental in directing the swarf in front of the die as the latter advances along the work being threaded thereby.
  • Figure 1 is a face view of a die according to the present invention.
  • Figure 2 is a side view thereof in the direction of the arrow A in Figure 1, and
  • Figure 3 is a section on the line 3-3 of Figure 1.
  • the die I is provided with the usual transverse peripheral locating slots 2 and is provided with a complete thread 3 interrupted by gashes 4, which gashes extend through the lead 5 and into, but not through, the complete thread 3.
  • the gashes 4 are formed in the complete thread 3 by forming recesses 6 in the face of the die in such a manner that the axes of the recesses are inclined to the face of the die and that they break through into the thread 3 removing portions of the latter to form, in effect, gashes 4 therein.
  • the recesses 6 are preferably produced by means of an end mill or the like cutting tool applied with its axis inclined to the face of the die.
  • the curved side portions 1 of each recess 6 form with the corresponding remaining part 8 of the with a similar series of recesses I I to form swarf directing surfaces I2 and cutting edges l3, which latter series of recesses are preferably staggered with respect to the beforementioned recesses 6, as shown, so that the die body is not unduly weakened by the formation of the recesses.
  • Improvements connected with screw thread dies wherein the die has an uninterrupted complete thread formed therein which is adapted to stabilise the die on the work being threaded, a lead to said thread formed by chamfering the first few convolutions thereof, axially inclined recesses formed in the face of said die so as to break into the thread lead and complete thread to form gashes therein said gashes extending from the lead into but not through the complete thread, backed-off cutting edges formed by said recesses and the adjacent remaining part of the lead and first few full formed threads, and flat portions inclined to the face of the die formed by running out said gashes to the peripheral edge of said die adapted together with the sides of said recesses to direct the swarf away from said cutting edges and in front of the die as the latter is a thread portion of full form in said threaded bore adapted to stabilize the die on work bein threaded thereby; cutting edges formed by said gashes and the adjacent remaining parts of the lead and first few threads of full form; curved I sides to said rece

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US733628A 1946-02-21 1947-03-10 Screw-thread die Expired - Lifetime US2513864A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB257796X 1946-02-21
GB180247X 1947-02-18

Publications (1)

Publication Number Publication Date
US2513864A true US2513864A (en) 1950-07-04

Family

ID=26253070

Family Applications (1)

Application Number Title Priority Date Filing Date
US733628A Expired - Lifetime US2513864A (en) 1946-02-21 1947-03-10 Screw-thread die

Country Status (6)

Country Link
US (1) US2513864A (fr)
BE (1) BE471363A (fr)
CH (1) CH257796A (fr)
FR (1) FR968832A (fr)
GB (1) GB608360A (fr)
NL (2) NL130497B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799028A (en) * 1953-03-16 1957-07-16 Licencia Talalmanyokat Ertkesi Elastic thread-cutting die with automatic adjustment
US4743146A (en) * 1986-10-02 1988-05-10 Kharkovsky Filial Golovnogo Spetsialnogo Proizvodstvennogo Konstruktorsko-Tekhnologicheskogo Bjuro Po Ratsionalnomu Primeneniju Rezhuschego Instrumenta "Orgpriminstrument" Tool for cutting external threads
US11548082B2 (en) 2020-11-27 2023-01-10 Milwaukee Electric Tool Corporation Powered threaded rod cutter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US561913A (en) * 1896-06-09 stoughton
US689555A (en) * 1901-05-29 1901-12-24 Albert Edward Mann Combined integral threading nut or die and common nut.
CH29849A (fr) * 1903-10-14 1904-10-15 Mueller & Cie Filière perfectionnée
US1165989A (en) * 1915-03-18 1915-12-28 Allen Mfg Company Threading-die.
US1524235A (en) * 1923-03-24 1925-01-27 Leon C Germain Die

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US561913A (en) * 1896-06-09 stoughton
US689555A (en) * 1901-05-29 1901-12-24 Albert Edward Mann Combined integral threading nut or die and common nut.
CH29849A (fr) * 1903-10-14 1904-10-15 Mueller & Cie Filière perfectionnée
US1165989A (en) * 1915-03-18 1915-12-28 Allen Mfg Company Threading-die.
US1524235A (en) * 1923-03-24 1925-01-27 Leon C Germain Die

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799028A (en) * 1953-03-16 1957-07-16 Licencia Talalmanyokat Ertkesi Elastic thread-cutting die with automatic adjustment
US4743146A (en) * 1986-10-02 1988-05-10 Kharkovsky Filial Golovnogo Spetsialnogo Proizvodstvennogo Konstruktorsko-Tekhnologicheskogo Bjuro Po Ratsionalnomu Primeneniju Rezhuschego Instrumenta "Orgpriminstrument" Tool for cutting external threads
US11548082B2 (en) 2020-11-27 2023-01-10 Milwaukee Electric Tool Corporation Powered threaded rod cutter

Also Published As

Publication number Publication date
NL68449C (fr)
NL130497B (fr)
GB608360A (en) 1948-09-14
FR968832A (fr) 1950-12-06
BE471363A (fr)
CH257796A (fr) 1948-10-31

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