JPS57130719A - Hot extrusion forming method for inside stepped tube - Google Patents

Hot extrusion forming method for inside stepped tube

Info

Publication number
JPS57130719A
JPS57130719A JP1463381A JP1463381A JPS57130719A JP S57130719 A JPS57130719 A JP S57130719A JP 1463381 A JP1463381 A JP 1463381A JP 1463381 A JP1463381 A JP 1463381A JP S57130719 A JPS57130719 A JP S57130719A
Authority
JP
Japan
Prior art keywords
stepped tube
mandrel
hot extrusion
concavity
small diameter
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.)
Granted
Application number
JP1463381A
Other languages
Japanese (ja)
Other versions
JPS6354447B2 (en
Inventor
Yukio Iwasaki
Masao Nakada
Munekatsu Furukata
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP1463381A priority Critical patent/JPS57130719A/en
Publication of JPS57130719A publication Critical patent/JPS57130719A/en
Publication of JPS6354447B2 publication Critical patent/JPS6354447B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/085—Making tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)

Abstract

PURPOSE:To form an excellent insinde stepped tube free from concavity on the outer surface by using a mandrel provided with an annular curved concavity smaller in diameter than the small diameter part at the base of the small diamenter part at the tip in froming an inside stepped tube from a hollow billet by hot extrusion. CONSTITUTION:For the small diameter part 22 of required length at the tip, a large diameter part 24 connected thereto through a tapered part 23 and a small diameter part 22 in front of the tapered part, a mandred 21 provided with an annular curved concavity 25 smaller in diameter than the above is used. This mandrel 21 is fitted to a mandrel holder 3, and a hollow billet (a) put in a container 5 is pressed through a dummy block (a') by forward movement of a stem 4 that follows the movement of a crosshead 2. At the same time, the mandrel 21 is put in a caliber 18 of a die 4, and metallic material of the billet (a) is extruded between the two. Thus, an inside stepped tube is formed without forming concavities on the outer surface where the inside tapered part is positioned.
JP1463381A 1981-02-02 1981-02-02 Hot extrusion forming method for inside stepped tube Granted JPS57130719A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1463381A JPS57130719A (en) 1981-02-02 1981-02-02 Hot extrusion forming method for inside stepped tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1463381A JPS57130719A (en) 1981-02-02 1981-02-02 Hot extrusion forming method for inside stepped tube

Publications (2)

Publication Number Publication Date
JPS57130719A true JPS57130719A (en) 1982-08-13
JPS6354447B2 JPS6354447B2 (en) 1988-10-28

Family

ID=11866592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1463381A Granted JPS57130719A (en) 1981-02-02 1981-02-02 Hot extrusion forming method for inside stepped tube

Country Status (1)

Country Link
JP (1) JPS57130719A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103567249A (en) * 2013-10-31 2014-02-12 中北大学 Extrusion moulding combined mould of large long-cone horn cylinder member
WO2019001635A1 (en) * 2017-06-28 2019-01-03 Technische Universität Berlin Bridge tool for producing extruded profiled elements of varying cross-section
TWI680023B (en) * 2018-11-27 2019-12-21 國立中山大學 Die for metal tube extrusion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103567249A (en) * 2013-10-31 2014-02-12 中北大学 Extrusion moulding combined mould of large long-cone horn cylinder member
WO2019001635A1 (en) * 2017-06-28 2019-01-03 Technische Universität Berlin Bridge tool for producing extruded profiled elements of varying cross-section
CN110891704A (en) * 2017-06-28 2020-03-17 柏林工业大学 Bridge extrusion die tool for producing extruded profiles with different cross sections
CN110891704B (en) * 2017-06-28 2022-04-22 柏林工业大学 Bridge extrusion die tool for producing extruded profiles with different cross sections
TWI680023B (en) * 2018-11-27 2019-12-21 國立中山大學 Die for metal tube extrusion

Also Published As

Publication number Publication date
JPS6354447B2 (en) 1988-10-28

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