JPS5947004A - Production of stepped metallic pipe - Google Patents

Production of stepped metallic pipe

Info

Publication number
JPS5947004A
JPS5947004A JP15869982A JP15869982A JPS5947004A JP S5947004 A JPS5947004 A JP S5947004A JP 15869982 A JP15869982 A JP 15869982A JP 15869982 A JP15869982 A JP 15869982A JP S5947004 A JPS5947004 A JP S5947004A
Authority
JP
Japan
Prior art keywords
dies
blank pipe
pipe
tension
production
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
JP15869982A
Other languages
Japanese (ja)
Other versions
JPH0351487B2 (en
Inventor
Keiichiro Yoshida
Original Assignee
Keiichiro Yoshida
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 Keiichiro Yoshida filed Critical Keiichiro Yoshida
Priority to JP57158699A priority Critical patent/JPH0351487B2/ja
Publication of JPS5947004A publication Critical patent/JPS5947004A/en
Publication of JPH0351487B2 publication Critical patent/JPH0351487B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B17/00Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills

Abstract

PURPOSE:To suppress the increase in the wall thickness of a product to a slight level and to improve the speed of working by inserting a blank pipe into tandem rool dies, and pressure forming the pipe while applying tension to the blank pipe between the respective rolls. CONSTITUTION:A blank pipe is inserted into tandem drive type roll dies A1-An having slight level differences from one end thereof, and while tension is applied on the blank pipe between the dies A1-An, the blank pipe is pressure formed successively to a stepped metallic pipe of a smaller diameter. The degree of taper is adjusted by regulating the space between the adjacent dies, and the tension is applied by increasing the peripheral speeds of the respective roll dies. The dies A1-An are arranged by crossing the same by 90 deg. with each other for each of the adjacent rolls.
JP57158699A 1982-09-10 1982-09-10 Expired - Lifetime JPH0351487B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57158699A JPH0351487B2 (en) 1982-09-10 1982-09-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57158699A JPH0351487B2 (en) 1982-09-10 1982-09-10

Publications (2)

Publication Number Publication Date
JPS5947004A true JPS5947004A (en) 1984-03-16
JPH0351487B2 JPH0351487B2 (en) 1991-08-07

Family

ID=15677419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57158699A Expired - Lifetime JPH0351487B2 (en) 1982-09-10 1982-09-10

Country Status (1)

Country Link
JP (1) JPH0351487B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63242429A (en) * 1987-03-27 1988-10-07 Agency Of Ind Science & Technol Manufacture of diameter reduced pipe
JPH0238504A (en) * 1988-07-26 1990-02-07 Chisso Corp Manufacture of ferromagnetic metal fine particle having excellent dispersibility

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4884763A (en) * 1972-02-16 1973-11-10

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4884763A (en) * 1972-02-16 1973-11-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63242429A (en) * 1987-03-27 1988-10-07 Agency Of Ind Science & Technol Manufacture of diameter reduced pipe
JPH0238504A (en) * 1988-07-26 1990-02-07 Chisso Corp Manufacture of ferromagnetic metal fine particle having excellent dispersibility

Also Published As

Publication number Publication date
JPH0351487B2 (en) 1991-08-07

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