JPS55156613A - Extruding method for pipe - Google Patents

Extruding method for pipe

Info

Publication number
JPS55156613A
JPS55156613A JP6479779A JP6479779A JPS55156613A JP S55156613 A JPS55156613 A JP S55156613A JP 6479779 A JP6479779 A JP 6479779A JP 6479779 A JP6479779 A JP 6479779A JP S55156613 A JPS55156613 A JP S55156613A
Authority
JP
Japan
Prior art keywords
billet
mandrel
block
diameter
container
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
JP6479779A
Other languages
Japanese (ja)
Inventor
Kunichi Sato
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to JP6479779A priority Critical patent/JPS55156613A/en
Publication of JPS55156613A publication Critical patent/JPS55156613A/en
Pending legal-status Critical Current

Links

Landscapes

  • Extrusion Of Metal (AREA)

Abstract

PURPOSE: To extrude the pipe with little thickness-deviation being free from the scale-inclusion, by first pressing the billet using the dummy blocks of approximately equal diameter to the container's diameter and of diameter a specified amount smaller than the container's diameter in this order, and then, by piercing this billet.
CONSTITUTION: The dummy block 4 of outer diameter approximately equal to inner diameter of the container 5 is fitted to the mandrel 2 and is held; the stem 1 and the mandrel 2 are driven forward to press the billet 6 through the block 4 until the billet 6 fills up the inside of the container 5. Then, the mandrel 2 is driven forward to pierce the billet 6, and the mandrel 2 is pulled back; after that, the stem 1, the mandrel 2 and the block 4 are pulled back, and the block 4 is replaced with another dummy block 4 of diameter smaller by twice of shell thickness to be left behind than the diameter of the former block 4. Next, the mandrel 2 is moved forward to permit the block 4 to contact with the billet 6; after that, the billet 6 is again pierced by the mandrel 2, and the billet 6 is pushed through the block 4 and is extruded through the ring type gap being formed by the die 7 and the mandrel 2.
COPYRIGHT: (C)1980,JPO&Japio
JP6479779A 1979-05-25 1979-05-25 Extruding method for pipe Pending JPS55156613A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6479779A JPS55156613A (en) 1979-05-25 1979-05-25 Extruding method for pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6479779A JPS55156613A (en) 1979-05-25 1979-05-25 Extruding method for pipe

Publications (1)

Publication Number Publication Date
JPS55156613A true JPS55156613A (en) 1980-12-05

Family

ID=13268578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6479779A Pending JPS55156613A (en) 1979-05-25 1979-05-25 Extruding method for pipe

Country Status (1)

Country Link
JP (1) JPS55156613A (en)

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