RO71124A - Procedeu de perforare a semifabricatelor utilizate la fabricarea tevilor - Google Patents

Procedeu de perforare a semifabricatelor utilizate la fabricarea tevilor

Info

Publication number
RO71124A
RO71124A RO7687346A RO8734676A RO71124A RO 71124 A RO71124 A RO 71124A RO 7687346 A RO7687346 A RO 7687346A RO 8734676 A RO8734676 A RO 8734676A RO 71124 A RO71124 A RO 71124A
Authority
RO
Romania
Prior art keywords
perforating
pipes
semi
manufacture
products used
Prior art date
Application number
RO7687346A
Other languages
English (en)
French (fr)
Inventor
Seishiro Yoshiwara
Minoru Kawaharada
Samon Yanagimoto
Original Assignee
Nippon Steel Corp,Jp
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 Nippon Steel Corp,Jp filed Critical Nippon Steel Corp,Jp
Publication of RO71124A publication Critical patent/RO71124A/ro

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
    • B21B17/08Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Forging (AREA)
RO7687346A 1975-08-22 1976-08-21 Procedeu de perforare a semifabricatelor utilizate la fabricarea tevilor RO71124A (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50102348A JPS5224970A (en) 1975-08-22 1975-08-22 Method of press roll boring

Publications (1)

Publication Number Publication Date
RO71124A true RO71124A (ro) 1981-11-04

Family

ID=14324973

Family Applications (1)

Application Number Title Priority Date Filing Date
RO7687346A RO71124A (ro) 1975-08-22 1976-08-21 Procedeu de perforare a semifabricatelor utilizate la fabricarea tevilor

Country Status (9)

Country Link
JP (1) JPS5224970A (ro)
BR (1) BR7605525A (ro)
CA (1) CA1046308A (ro)
DE (1) DE2637542A1 (ro)
FR (1) FR2321340A1 (ro)
GB (1) GB1554753A (ro)
IT (1) IT1062264B (ro)
RO (1) RO71124A (ro)
SU (1) SU1022652A3 (ro)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53132453A (en) * 1977-04-25 1978-11-18 Sumitomo Metal Ind Ltd Piercing method in press piercing mill
JPS6289110U (ro) * 1985-11-25 1987-06-08
CN112453075A (zh) * 2020-10-20 2021-03-09 浙江铜加工研究院有限公司 管材上料机构及高速轧机

Also Published As

Publication number Publication date
IT1062264B (it) 1984-02-01
GB1554753A (en) 1979-10-31
JPS5224970A (en) 1977-02-24
CA1046308A (en) 1979-01-16
FR2321340A1 (fr) 1977-03-18
JPS563124B2 (ro) 1981-01-23
BR7605525A (pt) 1977-08-09
SU1022652A3 (ru) 1983-06-07
FR2321340B1 (ro) 1979-01-12
DE2637542A1 (de) 1977-02-24

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