IT1279193B1 - Perforation/rolling procedure and device for steel ppes without joints - Google Patents
Perforation/rolling procedure and device for steel ppes without jointsInfo
- Publication number
- IT1279193B1 IT1279193B1 IT95TO000363A ITTO950363A IT1279193B1 IT 1279193 B1 IT1279193 B1 IT 1279193B1 IT 95TO000363 A IT95TO000363 A IT 95TO000363A IT TO950363 A ITTO950363 A IT TO950363A IT 1279193 B1 IT1279193 B1 IT 1279193B1
- Authority
- IT
- Italy
- Prior art keywords
- angle
- inclination
- way
- main cylinder
- face
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 239000010959 steel Substances 0.000 title abstract 2
- 238000005096 rolling process Methods 0.000 title 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
Landscapes
- Metal Rolling (AREA)
Abstract
Procedure for producing steel pipes without weld means of the Mannesmann pipe production process, in which a round ingot is made to pass through a perforator and the centre of the round ingot is perforated to obtain a hollow shell. A pair of disc cylinders is arranged in such a way as to be inclined by an angle of inclination δ with respect to a pass line towards a main cylinder of the conical type arranged on the entrance side, where the material to roll enters into the sliding face of the disc cylinder, thereby becoming non-parallel with respect to the angle of the exit face of the main cylinder, while the angle of inclination δ is fixed in such a way as to meet the following conditions relative to the angle of the inclination δ, to the angle of the entrance face θ1 and to the angle of the exit face θ2 of the main cylinder, in such a way as to obtain an expansion ratio of the external diameter having a value of 1.15 or more: "θ2+2degree<δ<9degree, δ+θl<12degree <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT95TO000363A IT1279193B1 (en) | 1995-05-09 | 1995-05-09 | Perforation/rolling procedure and device for steel ppes without joints |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT95TO000363A IT1279193B1 (en) | 1995-05-09 | 1995-05-09 | Perforation/rolling procedure and device for steel ppes without joints |
Publications (3)
Publication Number | Publication Date |
---|---|
ITTO950363A0 ITTO950363A0 (en) | 1995-05-09 |
ITTO950363A1 ITTO950363A1 (en) | 1996-11-09 |
IT1279193B1 true IT1279193B1 (en) | 1997-12-04 |
Family
ID=11413537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT95TO000363A IT1279193B1 (en) | 1995-05-09 | 1995-05-09 | Perforation/rolling procedure and device for steel ppes without joints |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1279193B1 (en) |
-
1995
- 1995-05-09 IT IT95TO000363A patent/IT1279193B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
ITTO950363A1 (en) | 1996-11-09 |
ITTO950363A0 (en) | 1995-05-09 |
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Legal Events
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0001 | Granted |