JPS6471518A - Hot extruding pipe manufacturing method - Google Patents

Hot extruding pipe manufacturing method

Info

Publication number
JPS6471518A
JPS6471518A JP22735387A JP22735387A JPS6471518A JP S6471518 A JPS6471518 A JP S6471518A JP 22735387 A JP22735387 A JP 22735387A JP 22735387 A JP22735387 A JP 22735387A JP S6471518 A JPS6471518 A JP S6471518A
Authority
JP
Japan
Prior art keywords
mandrel
speed
stem
transducer
pipe manufacturing
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
JP22735387A
Other languages
Japanese (ja)
Inventor
Nobuaki Hiraoka
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 JP22735387A priority Critical patent/JPS6471518A/en
Publication of JPS6471518A publication Critical patent/JPS6471518A/en
Pending legal-status Critical Current

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  • Extrusion Of Metal (AREA)

Abstract

PURPOSE:To eliminate the wear concentration on the rear end of a mandrel and to improve its service life by increasing the mandrel advancing speed to be faster than that of a stem so that the stem and mandrel come to the advance limitting position at the same time at the time of finishing the manufacturing of the pipe. CONSTITUTION:The position of the mandrel is detected by a position transducer 16 provided on a mandrel ram 10, to enable the mandrel speed to be detected by a speed transducer 17. Then, the position of the mandrel 4 is set on a slightly projecting position from the front surface of the die 2 at the beginning of the pipe manufacturing. In this state, the stem 3 and the mandrel 4 are advanced in a same speed, when the stem 3 is arrived at the starting position of the extrusion, the speed of the mandrel is increased and the speed of the above- mentioned speed transducer 17 is controlled so that the stem 3 and the mandrel 4 are arrived at the advance limitting position at the same time. By this method, the whole length of the mandrel is brought into contact with the die to eliminate the wear concentration at the rear end part and the service life is extended.
JP22735387A 1987-09-10 1987-09-10 Hot extruding pipe manufacturing method Pending JPS6471518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22735387A JPS6471518A (en) 1987-09-10 1987-09-10 Hot extruding pipe manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22735387A JPS6471518A (en) 1987-09-10 1987-09-10 Hot extruding pipe manufacturing method

Publications (1)

Publication Number Publication Date
JPS6471518A true JPS6471518A (en) 1989-03-16

Family

ID=16859469

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22735387A Pending JPS6471518A (en) 1987-09-10 1987-09-10 Hot extruding pipe manufacturing method

Country Status (1)

Country Link
JP (1) JPS6471518A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014041881A1 (en) * 2012-09-12 2014-03-20 宇部興産機械株式会社 Double-action extrusion press

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014041881A1 (en) * 2012-09-12 2014-03-20 宇部興産機械株式会社 Double-action extrusion press
CN104395007A (en) * 2012-09-12 2015-03-04 宇部兴产机械株式会社 Double-action extrusion press
US9486849B2 (en) 2012-09-12 2016-11-08 Ube Machinery Corporation, Ltd. Double-action extrusion press

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