JPS57181729A - Notching method of long metallic hollow pipe material and its device - Google Patents

Notching method of long metallic hollow pipe material and its device

Info

Publication number
JPS57181729A
JPS57181729A JP6662781A JP6662781A JPS57181729A JP S57181729 A JPS57181729 A JP S57181729A JP 6662781 A JP6662781 A JP 6662781A JP 6662781 A JP6662781 A JP 6662781A JP S57181729 A JPS57181729 A JP S57181729A
Authority
JP
Japan
Prior art keywords
large notch
notched
stroke
lengthwise direction
same way
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
JP6662781A
Other languages
Japanese (ja)
Other versions
JPS596729B2 (en
Inventor
Teruo Imai
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.)
KYORITSU KINZOKU KOGYO KK
Original Assignee
KYORITSU KINZOKU 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 KYORITSU KINZOKU KOGYO KK filed Critical KYORITSU KINZOKU KOGYO KK
Priority to JP6662781A priority Critical patent/JPS596729B2/en
Publication of JPS57181729A publication Critical patent/JPS57181729A/en
Publication of JPS596729B2 publication Critical patent/JPS596729B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)

Abstract

PURPOSE:To form a large notch on the way of a metallic hollow pipe which is apt to cause core deflection, by notching at a single stroke plural small notches divided at equal internals, moving it by a constant stroke in the lengthwise direction, and notching the remaining part in the same way. CONSTITUTION:A remaining projecting piece 2 of equal interval length D is placed so as to divide the opening length L of a large notch 1, and plural small notches are notches at a single stroke. Subsequently, it is moved by a constant stroke S in the lengthwise direction, a remaining part containing plural remaining projecting pieces 2 is notched at a single stroke in the same way as above, and a large notch 1 is formed. At first, a mandrel C is inserted into the hollow inside of a material M, is set to a band groove 7 of a lower mold A, and a fixed pin 18 of through-holes 10, 17 of the lower mold A and the mandrel C is made to pass through and is fixed. Subsequently, plural small notches 3 are notched by lowering a moving upper mold B. Subseqently, only the material M is moved by a constant stroke in the lengthwise direction, the upper mold B is lowered in the same way as above, and the large notch 1 having the opening length L is notched and formed.
JP6662781A 1981-04-30 1981-04-30 Method and device for cutting out long metal hollow pipe materials Expired JPS596729B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6662781A JPS596729B2 (en) 1981-04-30 1981-04-30 Method and device for cutting out long metal hollow pipe materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6662781A JPS596729B2 (en) 1981-04-30 1981-04-30 Method and device for cutting out long metal hollow pipe materials

Publications (2)

Publication Number Publication Date
JPS57181729A true JPS57181729A (en) 1982-11-09
JPS596729B2 JPS596729B2 (en) 1984-02-14

Family

ID=13321313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6662781A Expired JPS596729B2 (en) 1981-04-30 1981-04-30 Method and device for cutting out long metal hollow pipe materials

Country Status (1)

Country Link
JP (1) JPS596729B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014187441A1 (en) * 2013-05-18 2014-11-27 Bruhnke, Ulrich Method and system for separating hollow sections

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014187441A1 (en) * 2013-05-18 2014-11-27 Bruhnke, Ulrich Method and system for separating hollow sections
JP2016520007A (en) * 2013-05-18 2016-07-11 ブルーンケ・ウルリヒ Method and apparatus for cutting hollow chamber profiles
US10035203B2 (en) 2013-05-18 2018-07-31 Ulrich Bruhnke Method and apparatus for separating hollow sections

Also Published As

Publication number Publication date
JPS596729B2 (en) 1984-02-14

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