US1048921A - Die-blank. - Google Patents

Die-blank. Download PDF

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Publication number
US1048921A
US1048921A US67861612A US1912678616A US1048921A US 1048921 A US1048921 A US 1048921A US 67861612 A US67861612 A US 67861612A US 1912678616 A US1912678616 A US 1912678616A US 1048921 A US1048921 A US 1048921A
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United States
Prior art keywords
blank
die
rim
ribs
finished
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Expired - Lifetime
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US67861612A
Inventor
Frederic E Wells
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Individual
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Individual
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Priority to US67861612A priority Critical patent/US1048921A/en
Application granted granted Critical
Publication of US1048921A publication Critical patent/US1048921A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • 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

Definitions

  • This invention relates to improvements in thread-cutting dies, and more particularly to the method of forming the finished blank prior to the formation of the threads of the die.
  • the invention in its completed form, comprises a ribbed blank member and a thin, or somewhat reduced rim portion with a slit in the edge thereof to permit the rim to yield or spring, if desired, for cutting threads of different diameters.
  • Blanks from which dies are made are usually composed of a solid piece of steel requiring the removal of the surplus material by drilling or boring, which operation is an expensive process consuming not only a great deal of time, besides the waste of expensive material.
  • Applicants blank is formed from a solid piece of steel which is subjected to the drop forging process leaving the finished blank in shape for finishing the die; that is to say, for forming the cuttingteeth, and the other operations or processes for completing the die.
  • FIG. 2 shows a transverse sectional view on the line 22 of Fig. 3.
  • Fig. 3 is a plan view of Fig. 2 showing the diametri cally arranged ribs joined at the center, and rim portion of the blank.
  • Fig. 4 is a plan view of the finished die showing the slit in the rim portion, the adjusting screw, and the cut-ting teeth.
  • a designates a block of the stock from which the die is to be formed by the drop forging process.
  • Figs. 2 and 8 show the blank after it has been subjected to this process in which the ribs 7) are struck up, being formed integral with each other at the center of the blank and the rim 0 at their outer ends.
  • the webs (Z between the ribs are also integral with the ribs and rim, and in planes at substantially right angles to each other. The webs also serve to completely close one side of the finished blank and the rim, webs and ribs form separate pocket spaces.
  • the metal of the original stock-piece a as shown in Fig. 1, has therefore been forged into the blank shown in Figs. 2 and 8.
  • the next step in the process of making the finished die is to punch out the portions of metal from the webs (Z of the blank, shown in Fig. 3, and as indicated in Fig. 4: by the openings 6, f, and 9, thus forming the four inwardly projecting ends it on which the cutting teeth are formed; or, the center portion a may be first removed by drilling, and the openings 6, f, and 9 then formed.
  • a slit 7' is cut in the rim 0 so as to permit the adjusting screw 70 to vary the size of the thread to be cut. This screw is placed in a threaded opening at and extends across the slit 7' and engages the curved cornered portion 1' of the ribbed blank.
  • This particular invention relates to the formation of the cupped-shaped blank construction shown in Fig. 3, in contradistinction to the solid metal blank heretofore in use.
  • a die blank formed from a solid disk or blank and comprising a rim portion, the diameter of which is equal to the diameter of the solid disk, a web-portion integral with the rim portion and at right angles thereto, rib-members connected together at the cen ter portion of the blank and equal to the thickness of the finished rim portion, the

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

Description

P. E. WELLS.
DIE BLANK.
APPLIOATION FILED FEB. 19, 1912.
1,048,921. Patented Dec.31 ,1912.
WITNESSES: JNVENTOR,
ATTORNEY.
FREDERIC E. WELLS, OF GREENFIELD, MASSACHUSETTS.-
DIE-BLANK.
Specification of Letters Patent.
Patented Dec. 31,1912.
Application filed February 19, 1912. Serial No. 678,616.
To all whom it may concern:
Be it known that I, Fnnonnio E. WELLS, a citizen of the United States of America, residing at Greenfield, in the county of Franklin and State of Massachusetts, have invented new and useful Improvements in Die-Blanks, of which the following is a specification.
This invention relates to improvements in thread-cutting dies, and more particularly to the method of forming the finished blank prior to the formation of the threads of the die.
The invention, in its completed form, comprises a ribbed blank member and a thin, or somewhat reduced rim portion with a slit in the edge thereof to permit the rim to yield or spring, if desired, for cutting threads of different diameters.
Blanks from which dies are made are usually composed of a solid piece of steel requiring the removal of the surplus material by drilling or boring, which operation is an expensive process consuming not only a great deal of time, besides the waste of expensive material. Applicants blank is formed from a solid piece of steel which is subjected to the drop forging process leaving the finished blank in shape for finishing the die; that is to say, for forming the cuttingteeth, and the other operations or processes for completing the die.
In the drawings forming part of this application,-Figure l is an edge view of the stock from which the finished block is to be forged. Fig. 2 shows a transverse sectional view on the line 22 of Fig. 3. Fig. 3 is a plan view of Fig. 2 showing the diametri cally arranged ribs joined at the center, and rim portion of the blank. Fig. 4 is a plan view of the finished die showing the slit in the rim portion, the adjusting screw, and the cut-ting teeth.
Referring to the drawings in detail, a designates a block of the stock from which the die is to be formed by the drop forging process. Figs. 2 and 8 show the blank after it has been subjected to this process in which the ribs 7) are struck up, being formed integral with each other at the center of the blank and the rim 0 at their outer ends. The webs (Z between the ribs are also integral with the ribs and rim, and in planes at substantially right angles to each other. The webs also serve to completely close one side of the finished blank and the rim, webs and ribs form separate pocket spaces. The metal of the original stock-piece a, as shown in Fig. 1, has therefore been forged into the blank shown in Figs. 2 and 8. The next step in the process of making the finished die is to punch out the portions of metal from the webs (Z of the blank, shown in Fig. 3, and as indicated in Fig. 4: by the openings 6, f, and 9, thus forming the four inwardly projecting ends it on which the cutting teeth are formed; or, the center portion a may be first removed by drilling, and the openings 6, f, and 9 then formed. A slit 7' is cut in the rim 0 so as to permit the adjusting screw 70 to vary the size of the thread to be cut. This screw is placed in a threaded opening at and extends across the slit 7' and engages the curved cornered portion 1' of the ribbed blank.
This particular invention relates to the formation of the cupped-shaped blank construction shown in Fig. 3, in contradistinction to the solid metal blank heretofore in use.
WVhile the drawings and description show and describe a circular shaped adjustable die, the invention is also applicable to dies of any desired shape.
that I claim, is
l. A die-blank of general cup-shaped construction, ribs extending transversely of the blank, and integral webs between the ribs,
and the outer portions of the blank and in a plane at right angles to they ribs.
2. A die blank formed from a solid disk or blank and comprising a rim portion, the diameter of which is equal to the diameter of the solid disk, a web-portion integral with the rim portion and at right angles thereto, rib-members connected together at the cen ter portion of the blank and equal to the thickness of the finished rim portion, the
web-portion completely closing one side of and web portions forming independent the finished die-blank, as described. pocket spaces.
8. In a ribbed die-blank, a rim formed integral with the ribbed portion and webs 5 integral with the rim and ribs, said ribs Witnesses:
being integral with each other at their cen- OLIVE M. LONG, ter portions, the space between the rim, ribs, ARCHIBALD D. FLOWER.
FREDERIC E. WELLS.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,
7 Washington, D. C.
US67861612A 1912-02-19 1912-02-19 Die-blank. Expired - Lifetime US1048921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US67861612A US1048921A (en) 1912-02-19 1912-02-19 Die-blank.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67861612A US1048921A (en) 1912-02-19 1912-02-19 Die-blank.

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US1048921A true US1048921A (en) 1912-12-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209383A (en) * 1961-09-15 1965-10-05 Textron Ind Inc Fluted lobular thread-forming members

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209383A (en) * 1961-09-15 1965-10-05 Textron Ind Inc Fluted lobular thread-forming members

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