JPS57115934A - Thread rolling flat die - Google Patents

Thread rolling flat die

Info

Publication number
JPS57115934A
JPS57115934A JP244081A JP244081A JPS57115934A JP S57115934 A JPS57115934 A JP S57115934A JP 244081 A JP244081 A JP 244081A JP 244081 A JP244081 A JP 244081A JP S57115934 A JPS57115934 A JP S57115934A
Authority
JP
Japan
Prior art keywords
blank
thread
corresponds
small diameter
flat die
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.)
Pending
Application number
JP244081A
Other languages
Japanese (ja)
Inventor
Michio Murakami
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.)
Nitto Seiko Co Ltd
Original Assignee
Nitto Seiko Co Ltd
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 Nitto Seiko Co Ltd filed Critical Nitto Seiko Co Ltd
Priority to JP244081A priority Critical patent/JPS57115934A/en
Publication of JPS57115934A publication Critical patent/JPS57115934A/en
Pending legal-status Critical Current

Links

Classifications

    • 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)
  • Metal Rolling (AREA)

Abstract

PURPOSE:To roll stepped threads in one process and to improve the worability, by installing two rolling faces, each of which corresponds to the swelled part and small diameter part of the blank, respectively, to a thread rolling flat die. CONSTITUTION:When a blank 7 is supplied to the begining end of a thread rolling flat die 1, a small diameter part 15 of the blank 7 is caught by a counter boring part 16 and a desired thread is rolled by a finishing section 17. Since a swelled part corresponds to a chamfer 4 of a rolling face 2, it is not deformed, and any slips of the blank 7 caused by the difference of the rotating angular velocity do not occur. Moreover, when the swelled part of the blank 7 passes over the counter boring 9 and reaches a finishing section 10, a prescribed thread is rolled by a screw groove 6. Then, the swelled part 8 reaches a escaping section 11 and it is completely separated. The blank 7 is discharged from the die. At this time, a chamfer 13 corresponds to the small diameter section 15 of the blank 7, no deformation is applied to the thread and no slip of the blank 7 occurs.
JP244081A 1981-01-09 1981-01-09 Thread rolling flat die Pending JPS57115934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP244081A JPS57115934A (en) 1981-01-09 1981-01-09 Thread rolling flat die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP244081A JPS57115934A (en) 1981-01-09 1981-01-09 Thread rolling flat die

Publications (1)

Publication Number Publication Date
JPS57115934A true JPS57115934A (en) 1982-07-19

Family

ID=11529325

Family Applications (1)

Application Number Title Priority Date Filing Date
JP244081A Pending JPS57115934A (en) 1981-01-09 1981-01-09 Thread rolling flat die

Country Status (1)

Country Link
JP (1) JPS57115934A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110116181A (en) * 2019-04-22 2019-08-13 海盐县宏建五金有限公司 The screw plate of thread rolling machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110116181A (en) * 2019-04-22 2019-08-13 海盐县宏建五金有限公司 The screw plate of thread rolling machine

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