JPS55165220A - Extruding method using round bar as material - Google Patents

Extruding method using round bar as material

Info

Publication number
JPS55165220A
JPS55165220A JP7225679A JP7225679A JPS55165220A JP S55165220 A JPS55165220 A JP S55165220A JP 7225679 A JP7225679 A JP 7225679A JP 7225679 A JP7225679 A JP 7225679A JP S55165220 A JPS55165220 A JP S55165220A
Authority
JP
Japan
Prior art keywords
punch
die
diameter
selfishly
round bar
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
JP7225679A
Other languages
Japanese (ja)
Inventor
Haruma Tanaka
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.)
SANSHU PRESS KOGYO KK
Original Assignee
SANSHU PRESS KOGYO KK
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 SANSHU PRESS KOGYO KK filed Critical SANSHU PRESS KOGYO KK
Priority to JP7225679A priority Critical patent/JPS55165220A/en
Publication of JPS55165220A publication Critical patent/JPS55165220A/en
Pending legal-status Critical Current

Links

Landscapes

  • Extrusion Of Metal (AREA)

Abstract

PURPOSE: To carry out multistage extrusion without carrying out the cutting work, for manufacturing the mechanical parts of considerable precision and strength, by feeding the punch into the material while shearing the material with the outer diameter of the punch, and at the same time, by compressing the outer circumference of the material with the selfishly generated die, in order to perform the extrusion work.
CONSTITUTION: The material 8 comprising the metallic round bar is placed in the die 9 possessing the large diameter part to restrict the outgoing flow of the material 8 and the small diameter part to form the protruding part. Next, under this condition, the small diameter protruding part C is formed, while forming the cavity from one end of the round bar 8 by the punch 10 possessing diameter larger than the protruding part. When thinking of this material 8 undergoing above works to be divided into three parts, A, B, C, the "selfishly generated die" as shown by the dotted line 11 is formed at the boundary between A and B by the action of the punch 10. Then, this selfishly generated die 11 extrudes the material 8, being sheared and deformed by the punch 10, in the arrowed direction toward the center of the die 9, and the diameter of the material 8 is contracted, and the multistep product is formed.
COPYRIGHT: (C)1980,JPO&Japio
JP7225679A 1979-06-11 1979-06-11 Extruding method using round bar as material Pending JPS55165220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7225679A JPS55165220A (en) 1979-06-11 1979-06-11 Extruding method using round bar as material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7225679A JPS55165220A (en) 1979-06-11 1979-06-11 Extruding method using round bar as material

Publications (1)

Publication Number Publication Date
JPS55165220A true JPS55165220A (en) 1980-12-23

Family

ID=13484024

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7225679A Pending JPS55165220A (en) 1979-06-11 1979-06-11 Extruding method using round bar as material

Country Status (1)

Country Link
JP (1) JPS55165220A (en)

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