RO76194A - Dorn de perforare - Google Patents

Dorn de perforare

Info

Publication number
RO76194A
RO76194A RO7893213A RO9321378A RO76194A RO 76194 A RO76194 A RO 76194A RO 7893213 A RO7893213 A RO 7893213A RO 9321378 A RO9321378 A RO 9321378A RO 76194 A RO76194 A RO 76194A
Authority
RO
Romania
Prior art keywords
perforation
Prior art date
Application number
RO7893213A
Other languages
English (en)
French (fr)
Inventor
Helmut Landgraf
Original Assignee
Mannesmann Ag,De
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 Mannesmann Ag,De filed Critical Mannesmann Ag,De
Publication of RO76194A publication Critical patent/RO76194A/ro

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
    • B21B25/04—Cooling or lubricating mandrels during operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Metal Extraction Processes (AREA)
  • Heat Treatment Of Articles (AREA)
  • Chemically Coating (AREA)
  • Lead Frames For Integrated Circuits (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Wire Processing (AREA)
RO7893213A 1977-04-07 1978-02-15 Dorn de perforare RO76194A (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2716315A DE2716315C2 (de) 1977-04-07 1977-04-07 Innengekühlter Rohrwalzdorn

Publications (1)

Publication Number Publication Date
RO76194A true RO76194A (ro) 1981-03-30

Family

ID=6006193

Family Applications (1)

Application Number Title Priority Date Filing Date
RO7893213A RO76194A (ro) 1977-04-07 1978-02-15 Dorn de perforare

Country Status (12)

Country Link
US (1) US4173880A (ro)
JP (1) JPS53125953A (ro)
BR (1) BR7802138A (ro)
CS (1) CS201511B2 (ro)
DD (1) DD135359A5 (ro)
DE (1) DE2716315C2 (ro)
ES (1) ES467878A1 (ro)
FR (1) FR2386364A1 (ro)
GB (1) GB1592754A (ro)
IT (1) IT1093241B (ro)
RO (1) RO76194A (ro)
SE (1) SE425948B (ro)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3429524A1 (de) * 1984-08-10 1986-02-20 Kocks Technik Gmbh & Co, 4010 Hilden Dornstange oder stopfen fuer eine walzstrasse zum herstellen nahtloser rohre
DE102007021999A1 (de) * 2006-05-16 2007-11-22 Sms Meer Gmbh Verfahren zum Warmwalzen nahtloser Rohre auf einem Innenwerkzeug und Innenwerkzeug
CN102091719A (zh) * 2010-12-07 2011-06-15 宝钢集团常州轧辊制造公司 连轧管机用限动芯棒及其制造方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1950938A (en) * 1932-02-23 1934-03-13 Nat Tube Co Piercing point
US1951078A (en) * 1932-02-23 1934-03-13 Nat Tube Co Piercing point
GB640866A (en) * 1948-09-17 1950-08-02 Hermann Kurt Wiemer Improvements in rollers for roller mills
FR1000909A (fr) * 1949-11-30 1952-02-18 Perfectionnements aux échangeurs de chaleur
GB675604A (en) * 1950-01-06 1952-07-16 David Dalin Extended surface heat exchanger
US2972472A (en) * 1956-06-11 1961-02-21 Armstrong Cork Co Heat transfer roll
US3135319A (en) * 1959-12-24 1964-06-02 Emery B Richards Leveling roll
FR1272096A (fr) * 1960-08-08 1961-09-22 Csepeli Csogyar Laminoir à pas de pélerin, avec mandrin refroidi pour la fabrication de tubes
US3604237A (en) * 1967-04-03 1971-09-14 Takao Kawanami Work rolls and cooling method thereof
GB1333956A (en) 1971-04-19 1973-10-17 Nippon Kokan Kk Mandrel assembly and a method of ejecting a plug from a mandrel
SU398299A1 (ru) * 1971-10-08 1973-09-27 Институт черной металлургии Прокатный валок
US3780465A (en) * 1972-06-01 1973-12-25 Us Navy Wear resistant gun barrel and method of making the same
DE2331989A1 (de) * 1973-06-20 1975-01-23 Mannesmann Meer Ag Stopfenstange fuer kontinuierliche rohrwalzwerke
US4019846A (en) * 1975-06-05 1977-04-26 Wean United, Inc. Rolls in a briquetting machine or like machines

Also Published As

Publication number Publication date
SE425948B (sv) 1982-11-29
GB1592754A (en) 1981-07-08
CS201511B2 (en) 1980-11-28
SE7801807L (sv) 1978-10-08
IT1093241B (it) 1985-07-19
JPS5551641B2 (ro) 1980-12-25
ES467878A1 (es) 1978-11-01
FR2386364B1 (ro) 1982-11-26
JPS53125953A (en) 1978-11-02
IT7821363A0 (it) 1978-03-20
DE2716315B1 (de) 1978-03-30
BR7802138A (pt) 1978-11-21
DE2716315C2 (de) 1978-11-16
US4173880A (en) 1979-11-13
FR2386364A1 (fr) 1978-11-03
DD135359A5 (de) 1979-05-02

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