EP0787542B1 - Verfahren zur Herstellung von nahtlosen Rohren und Innenwerkzeug hierzu - Google Patents
Verfahren zur Herstellung von nahtlosen Rohren und Innenwerkzeug hierzu Download PDFInfo
- Publication number
- EP0787542B1 EP0787542B1 EP97250015A EP97250015A EP0787542B1 EP 0787542 B1 EP0787542 B1 EP 0787542B1 EP 97250015 A EP97250015 A EP 97250015A EP 97250015 A EP97250015 A EP 97250015A EP 0787542 B1 EP0787542 B1 EP 0787542B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- mandrel
- block
- water
- inert gas
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000005096 rolling process Methods 0.000 claims description 135
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 239000011261 inert gas Substances 0.000 claims description 42
- 239000000498 cooling water Substances 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 8
- 238000005553 drilling Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000009795 derivation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000029305 taxis Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
Definitions
- the invention relates to a method for producing seamless tubes heated solid metal blocks, especially on a Mannesmann cross-rolling mill, as well as an inner tool for this.
- the cross roll Since the piercing mandrel has to do its work under the influence of the rolling heat it is extremely stressed and has a limited lifespan. The Since the invention of the cross rolling method, the cross roll has been striving for Extend the life of the mandrels to save costs and improve the quality of the to improve rolled pipes. The service life of the rolling mandrel is approaching At the end, the dome may lose its shape, a damaged surface or get welded material. This also means one Deterioration in pipe quality.
- Tinder leads to an imperfect Welding the tears of the loosened core zone and thus the Further processing of the hollow blocks to form shells and cracks on the Internal pipe surface.
- DE-PS 34 32 288 contains a device with which both water for internal cooling of the rolling mandrel as well as inert gas through the rolling rod are fed.
- a similar device describes the older Japanese Patent 61-002446.
- the water supply and Water drainage lines and the inert gas supply relatively easy to the rotating Rolling rod can be connected because the rolling rods are fixed to the mandrel abutment are connected and the connections after retracting the mandrel abutment finished rolling need not be released.
- one Cross-rolling mill becomes the rolling rod with mandrel through the rolled hollow block pulled out of this in order to be able to remove the hollow block.
- a disadvantage of the conventional Quenching is also the fact that the water attack on the hollow block is only from takes place outside and all the heat must be dissipated to the outside. succeed on the other hand, additional internal cooling of the hollow block could also be done by the achieve a finer grain more quickly.
- the object of the invention is therefore to create a method and an internal tool, that combines all of the above advantages without the disadvantages übemehmen.
- At least the Water for cooling the rolling mandrel through the mandrel abutment into the Rolling rod takes place during the rolling process by a to load the Watz bar swivel abutment removable from the rolling line in a stationary Position can be determined.
- the inner tool is designed according to the invention so that for the supply of Inert gas and forwarding to outlet holes on the mandrel abutment facing end of the rolling rod is sealed by sealing rings coaxially around the Rolling rod rotatable sleeve is attached to the end of the rolling rod in the there are radially drilled holes, which on the one hand lead to a Rolling rod provided ring channel that connects to the lines inside the Rolling rod is connected and on the other hand lead to an annular channel on the inside of a releasable gripping around the rolling rod Inert gas supply is provided.
- the sleeve that grips around the rolling rod in the manner of pliers can be easily released by opening the "pliers" and thereby also allows unhindered handling of the roller rod and the hollow block when stripping.
- the derivation of the through the mandrel abutment in the rolling rod cooling water also through the mandrel abutment is made through. It is also conceivable that the derivation of the Cooling water supplied through the mandrel abutment through in the roller rod provided radial holes in the area behind the rolling dome. Finally can also be provided that the derivation of the through the mandrel abutment in the Rolled cooling water directed from the roll rod can optionally be switched by the mandrel abutment through or through radial bores provided in the roller rod into the area behind the wadding mandrel. In all cases, the cooling water is supplied through through the mandrel abutment without the additional connections to be loosened with the Roll rod must be connected.
- the optional switching of the cooling water discharge can be done by moving the reach the cooling water conducting inner tube through which in the Moving end positions closed the corresponding outlet openings or are open.
- the intensity of the Internal cooling of the hollow block via the amount of the emerging from the rolling rod Control water is provided.
- the device according to the invention consists of a main elements Rolling rod 1 with the screwed rolling mandrel 2 and Swivel abutment 3.
- the rolling mandrel 2 is hollow and for effective internal cooling relatively thin-walled. To improve the heat transfer is the Internal surface of the mandrel 4 corrugated.
- the rolling mandrel 2 has a thread 5 the intermediate piece 6 of the roller rod 1 is screwed on. Because at the screw point no cooling water is allowed to penetrate outside, a sealing ring 8 is in a groove 9 of the intermediate piece 6 inserted. The same is repeated with the Intermediate piece 7 with the sealing ring 50.
- the sealing rings 8 and 50 can consist of a squeezable metal due to the effects of heat.
- the intermediate piece 6 is with the intermediate piece 7 through the thread 14 connected.
- the cooling water is through the pipe 11 in the rolling mandrel 2 passed in, runs outside on the tube 11 back into the annular gap 21 and passes from here through the outlet bores 22 into the annular gap, which is formed between the rolling rod 1 and the hollow block 10.
- the pipe 11 is prevented by the stop 51 from slipping in the longitudinal direction secured and sealed by the seal 52. From where the Water emerges from the bores 22 of the intermediate piece 7, the Hollow block 10 cooled from the inside. The water leaves the hollow block 10 in Rolling direction.
- the inert gas passes through the annular gap 23 and the bores 24 and 25 the rolling mandrel 2 and leaves the rolling rod 1 through the outlet bores 27, which are located in the intermediate piece 6.
- the outlet bores 27 for the inert gas are located closer to the mandrel 2 than the holes 22 for the cooling water.
- a circumferential bead 28 on the intermediate piece 7 also narrows the annular gap between the roller rod 1 and the hollow block 10 and thus further reduces the risk of water or steam get into the forming zone.
- the forming zone is through the rollers 43 and the mandrel 2 are formed.
- the inert gas leaves on the same paths as the cooling water the hollow block 10.
- FIG. 2 The inflow of cooling water and inert gas into the rolling rod 1 is shown in FIG. 2 shown. This is the place where the loose and in the rolling position Roll rod 1 is supported against the turntable 29 of the pivot abutment 3.
- the turntable 29 has the conical centering 30 Inlet bore 31, the cooling water in the central bore 19 of the Rolling rod 1 initiated and fed through the tube 11 to the rolling mandrel 2.
- the water and inert gas connections must be separated from each other locally so that none Water can flow into the inert gas line.
- the end piece is 18th the rolling rod 1 loosely attached a sleeve 32 which on the end piece 18th can rotate and which is sealed by the sealing rings 33.
- the sleeve 32 there are radially provided bores 34.
- the inert gas supply 35 is sealed according to FIG. 2 on the sleeve 32 by the seals 37.
- the end piece 18 is screwed to the intermediate piece 16 via the thread 17, which in turn is welded to the pipe 15.
- the inert gas supply 35 is opened together with the swivel abutment 3 when a hollow block is to be pulled off the roller rod.
- a modified version of the rolling rod-mandrel system according to Fig.4 and Fig.5 is based on the internal cooling of the hollow block 10 with water waived.
- the water inside the roller rod 1 again returned and emerges at the rear end of the rod. 4 that Water is fed into the rolling mandrel 2 via the pipe 11 and runs through it Tube 13, which envelops tube 11, back to the rod end.
- the Tube 11 is centered by spacers 12 in intermediate piece 6 and secured against shifting in the longitudinal direction.
- the tube 13 sealed by means of the sealing rings 45.
- the intermediate piece 6 is screwed together with the intermediate piece 7 via the thread 14.
- the Intermediate piece 7 is in turn welded to the tube 15 of the rolling rod 1.
- the tubes 11 and 13 can be removed by unscrewing the end piece 18 become.
- the inert gas passes through the annular gap 23 in the front part of the Rolling rod 1 and leaves it through the outlet bores 27a, which in Intermediate piece 7 are arranged.
- the opposite end of the rolling rod 1 is shown in FIG. 5.
- the intermediate piece 16 is welded to the pipe 15 and via the thread 17th connected to the end piece 18.
- the tube 11 extends into the end piece 18th into it and through the central bore 19 enables the water supply.
- the Water flowing back through the pipe 13 reaches the area of the end piece 18 in the annular gap 44 and is derived via the holes 20.
- the Turntable 29 with its conical centering 30 is to catch the Return water additionally equipped with the annular space 46, which the water collects and through the holes 47 in a manner not shown on Turntable 29 arranged rotating connection feeds into one Hose connection passes over.
- a seal 48 seals the rod seat in the turntable 29.
- connection of the inert gas is carried out in the manner already described.
- the holes 39 go into the Longitudinal bores 40 over. From here, the inert gas passes through the annular gap 23 passed to the front part of the rolling rod 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Description
wobei
das Wasser zum Kühlen des Walzdorns rückgeführt und an einer nahestmöglichen Position hinter der Umformzone der Walzen zum Abschrecken der Hohlblockinnenseite in den Zwischenraum zwischen Walzstange und Hohlblockinnenseite geleitet wird, gleichzeitig die Umformzone um den Walzdorn herum zur Verhinderung der Oxidation der Hohlblockinnenoberfläche unter Inertgas gesetzt wird, wobei das Inertgas als Sperre gegen Eindringen von Wasser in die Umformzone zwischen Dom und Hohlblock wirkt und der Hohlblock unmittelbar nach dem Walzen in Walzrichtung von der Stange abgezogen wird.
- Figur 1:
- das vordere Walzstangenende mit Walzdorn sowie Inertgas- und Wasseraustritt hinter dem Walzdorn,
- Figur 2:
- das hintere Walzstangenende mit Wassereintritt und Inertgasanschluß als Fortsetzung zu Fig. 1,
- Figur 3:
- einen Querschnitt durch die Walzstange und Anschlußzange für die Inertgaszuführung,
- Figur 4:
- das vorderes Walzstangenende mit Walzdorn, Inertgasaustritt und innerem Wasserumlauf,
- Figur 5:
- das hintere Stangenende mit Wasserein- und Austritt und Inertgasanschluß als Fortsetzung zu Fig. 4 und
- Figur 6:
- eine Alternative mit verschließbarem Wasserausfluß.
Die Inertgaszuführung 35 wird zusammen mit dem Schwenkwiderlager 3 geöffnet, wenn ein Hohlblock von der Walzstange abgezogen werden soll.
- 1
- Walzstange
- 2
- Walzdorn
- 3
- schwenkbares Dornwiderlager
- 4
- gewellte Dorninnenoberfläche
- 5
- Gewinde
- 6
- Zwischenstück
- 7
- Zwischenstück
- 8
- Dichtungsring
- 9
- Nut
- 10
- Hohlblock
- 11
- Innenrohr
- 12
- Abstandshalter
- 13
- Rohr
- 14
- Gewinde
- 15
- Rohr
- 16
- Zwischenstück
- 17
- Gewinde
- 18
- Endstück
- 19
- Zentralbohrung
- 20
- Bohrungen
- 21
- Ringspalt
- 22
- Austrittsbohrungen
- 23
- Ringspalt
- 24
- Bohrungen
- 25
- Bohrungen
- 26
- Ringkanal
- 27
- Austrittsbohrungen
- 27a
- Austrittsbohrungen
- 28
- Wulst
- 29
- Drehteller
- 30
- Zentrierung
- 31
- Zulaufbohrung
- 32
- Hülse
- 33
- Dichtungsringe
- 34
- Bohrungen
- 35
- Inertgaszuführung
- 36
- Ringkanal
- 37
- Dichtungen
- 38
- Ringkanal
- 39
- Bohrungen
- 40
- Längsbohrungen
- 43
- Walze
- 44
- Ringspalt
- 45
- Dichtungsringe
- 46
- Ringraum
- 47
- Bohrungen
- 48
- Dichtung
- 49
- Schlauchanschluß
- 50
- Dichtungsring
- 51
- Anschlag
- 52
- Dichtung
Claims (8)
- Verfahren zur Herstellung von nahtlosen Rohren aus erwärmten massiven Metallblöcken, insbesondere auf einem Mannesmann-Schrägwalzwerk, bei dem der Block durch die schräggestellten Walzen (43) vorgetrieben und über ein Innenwerkzeug gedrückt wird, das aus einem innengekühlten Walzdorn (2) besteht, der lösbar an einer Walzstange (1) befestigt ist, durch die sowohl Wasser zum Kühlen des Walzdornes (2) als auch Inertgas zur Einleitung in den entstehenden Hohlblock (10) hindurchleitbar ist, wobei sich die Walzstange (1) während des Walzens mit ihrem dem Walzdorn (2) abgewandten Ende gegen ein Dornwiderlager (3) abstützt,
wobei
das Wasser zum Kühlen des Walzdorns (2) rückgeführt und an einer nahestmöglichen Position hinter der Umformzone der Walzen (43) zum Abschrecken der Hohlblockinnenseite in den Zwischenraum zwischen Walzstange (1) und Hohlblockinnenseite geleitet wird, gleichzeitig die Umformzone um den Walzdorn (2) herum zur Verhinderung der Oxidation der Hohlblockinnenoberfläche unter Inertgas gesetzt wird, wobei das Inertgas als Sperre gegen Eindringen von Wasser in die Umformzone zwischen Dorn (2) und Hohlblock (10) wirkt und der Hohlblock (10) unmittelbar nach dem Walzen in Walzrichtung von der Stange (1) abgezogen wird. - Innenwerkzeug zur Herstellung von nahtlosen Rohren aus erwärmten massiven Metallblöcken, insbesondere auf einem Mannesmann-Schrägwalzwerk, nach Anspruch 1, bestehend aus einem innengekühlten Walzdorn, (2) der lösbar an einer Walzstange (1) befestigt ist, durch die sowohl Wasser zum Kühlen des Walzdornes (2) als auch Inertgas zur Einleitung in das innere des entstehenden Hohlblock (10) hindurchleitbar ist, wobei die Walzstange (1) mit ihrem dem Walzdorn (2) abgewandten Ende gegen ein Dornwiderlager (3) abgestützt ist,
wobei
mindestens die Zufuhr des Wassers für die Kühlung des Walzdornes (2) durch das Dornwiderlager (3) hindurch in die Watzstange (1) erfolgt, die während des Walzvorganges durch ein zum Laden der Watzstange (1) aus der Walzlinie entfernbares Schwenkwiderlager (3) in einer stationären Position festlegbar ist, zur Zufuhr des Inertgases und Weiterleitung zu Austaßbohrungen (27) am vorderen Ende der Walzstange (1) eine durch Dichtungsringe (33) abgedichtete koaxial um die Walzstange (1) drehbare Hülse (32) auf dem Endstück (18) der Walzstange (1) angebracht ist, in der sich radial angebrachte Bohrungen (34) befinden, die einerseits zu einem in der Walzstange (1) vorgesehenen Ringkanal (38) führen, der über die Bohrungen (39) mit dem Ringspalt (44) im Inneren der Walzstange (1) in Verbindung steht und andererseits zu einem Ringkanal (36) führen, der auf der Innenseite einer die Walzstange (1) zangenartig umgreifenden lösbaren Inertgaszuführung (35) vorgesehen ist und die Ableitung des durch das Dornwiderlager (3) zugeführten Kühlwassers durch in der Walzstange (1) vorgesehene Radialbohrungen (Austrittsbohrungen 22) in den Bereich hinter dem Walzdorn (2) erfolgt. - Innenwerkzeug nach Anspruch 2,
dadurch gekennzeichnet, dass die Ableitung des durch das Dornwiderlager (3) in die Walzstange (1) geleiteten Kühlwassers ebenfalls durch das Dornwiderlager (3) hindurch erfolgt. - Innenwerkzeug nach Anspruch 2,
dadurch gekennzeichnet, dass die Ableitung des durch das Dornwiderlager (3) in die Walzstange (1) geleiteten Kühlwassers wahlweise umschaltbar durch das Dornwiderlager (3) hindurch oder durch in der Walzstange (1) vorgesehene Radialbohrungen (Austrittsbohrungen 22) in den Bereich hinter dem Walzdorn (2) erfolgt. - Innenwerkzeug nach Anspruch 4,
dadurch gekennzeichnet, dass zum Umschalten der Kühlwasserabführung das das Kühlwasser leitende Innenrohr (13) verschiebbar ist und in den Verschiebeendstellungen die entsprechenden Austrittsbohrungen (22) durch das Innenrohr (13) verschlossen oder geöffnet sind. - Innenwerkzeug nach Anspruch 2 bis 5,
dadurch gekennzeichnet dass die Intensität der Innenkühlung des Hohlblocks (10 )über die Menge des aus der Walzstange (1) austretenden Wassers steuerbar ist. - Innenwerkzeug nach Anspruch 2 bis 6,
dadurch gekennzeichnet dass die Dorninnenoberfläche (4) für besseren Wärmeübergang gewellt ist - Innenwerkzeug nach Anspruch einem oder mehreren der vorherigen Ansprüche,
dadurch gekennzeichnet dass der mit Inertgas füllbare Raum zwischen Walzdorn (2) und Hohlblock (10) durch einen radial nach außen gewölbten ringförmigen Wulst (28) der Walzstange (1) weitgehend abgedichtbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19604969 | 1996-02-02 | ||
DE19604969A DE19604969C2 (de) | 1996-02-02 | 1996-02-02 | Verfahren zur Herstellung von nahtlosen Rohren und Innenwerkzeug |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0787542A2 EP0787542A2 (de) | 1997-08-06 |
EP0787542A3 EP0787542A3 (de) | 1998-10-28 |
EP0787542B1 true EP0787542B1 (de) | 2003-11-26 |
Family
ID=7785101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97250015A Expired - Lifetime EP0787542B1 (de) | 1996-02-02 | 1997-01-29 | Verfahren zur Herstellung von nahtlosen Rohren und Innenwerkzeug hierzu |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0787542B1 (de) |
DE (2) | DE19604969C2 (de) |
ES (1) | ES2206654T3 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL2580003T3 (pl) | 2010-06-08 | 2017-07-31 | Coating Management Switzerland Gmbh | Sposób wytwarzania rur bez szwu |
DE102011012761A1 (de) | 2011-03-01 | 2012-05-24 | Sms Meer Gmbh | Verfahren und Vorrichtung zum Erzeugen eines Hohlblocks, Innenwerkzeug mit einer Dornstange und einem Lochdorn, Verwendung eines Innenwerkzeugs und Verwendung eines Deoxidationsmittels |
CN103433281A (zh) * | 2013-08-28 | 2013-12-11 | 无锡欧龙特种钢管有限公司 | 一种无缝管穿孔机顶头冷却装置 |
RU2549022C1 (ru) * | 2013-10-07 | 2015-04-20 | Акционерное общество "Выксунский металлургический завод" | Способ горячей винтовой раскатки гильз и технологический инструмент для его осуществления |
RU2568805C1 (ru) * | 2014-05-27 | 2015-11-20 | Открытое акционерное общество "Российский научно-исследовательский институт трубной промышленности" (ОАО "РосНИТИ") | Охлаждаемая оправка косовалкового стана и способ ее охлаждения |
CN106825051B (zh) * | 2017-03-24 | 2018-11-02 | 山西容合易工业科技有限公司 | 一种无缝钢管穿孔机顶杆 |
MX2020005436A (es) * | 2017-11-29 | 2020-08-27 | Nippon Steel Corp | Perfordora, barra de mandril y metodo de produccion de un tubo de metal sin costura utilizando los mismos. |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE383240C (de) * | 1921-07-14 | 1923-10-11 | Abteilung Duesseldorfer Roehre | Vorrichtung zur Ausfuehrung des Verfahrens zur Herstellung gelochter Metallrohrbloecke |
DE594215C (de) * | 1932-06-21 | 1934-03-19 | Leo Becker | Schraegwalzwerk oder Rohrpresse zur Herstellung von nahtlosen Rohren |
US2159123A (en) * | 1936-11-09 | 1939-05-23 | Nat Tube Co | Rolling mill mandrel |
US2237983A (en) * | 1937-01-21 | 1941-04-08 | Nat Tube Co | Pipe or tube rolling |
DE3123645A1 (de) * | 1981-06-15 | 1982-12-30 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | "verfahren zur herstellung nahtloser kupferrohre" |
JPS5835005A (ja) * | 1981-08-27 | 1983-03-01 | Sumitomo Metal Ind Ltd | マンネスマン穿孔機による穿孔方法 |
JPS5933010A (ja) * | 1982-08-19 | 1984-02-22 | Kawasaki Steel Corp | 継目無鋼管製造用穿孔装置 |
JPS60130406A (ja) * | 1983-12-20 | 1985-07-11 | Kawasaki Steel Corp | 継目無鋼管の製造方法およびその装置 |
DE3432288C2 (de) * | 1984-09-01 | 1987-01-02 | Kocks Technik Gmbh & Co, 4010 Hilden | Anwendung von Inertgas beim Herstellen nahtloser Rohre |
DE4004155A1 (de) * | 1990-02-10 | 1991-08-14 | Kocks Technik | Verfahren und vorrichtung zum kuehlen und schmieren von dornstangen |
-
1996
- 1996-02-02 DE DE19604969A patent/DE19604969C2/de not_active Expired - Fee Related
-
1997
- 1997-01-29 ES ES97250015T patent/ES2206654T3/es not_active Expired - Lifetime
- 1997-01-29 EP EP97250015A patent/EP0787542B1/de not_active Expired - Lifetime
- 1997-01-29 DE DE59711039T patent/DE59711039D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2206654T3 (es) | 2004-05-16 |
DE19604969A1 (de) | 1997-08-07 |
DE19604969C2 (de) | 2000-08-24 |
EP0787542A3 (de) | 1998-10-28 |
EP0787542A2 (de) | 1997-08-06 |
DE59711039D1 (de) | 2004-01-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69418605T2 (de) | Verformungsverfahren eines geschweissten rohres | |
DE1427826A1 (de) | Verfahren zur Warmherstellung nahtloser Rohre | |
DE3138274A1 (de) | Vorrichtung zum haerten von stahlrohren | |
DE19955726C1 (de) | Vorrichtung zur Kunststoffummantelung einer Rohrleitung an Rohrverbindungen | |
EP0600214A1 (de) | Verfahren und Vorrichtung zur fortlaufenden Herstellung eines Verbundrohres mit einem aussen im wesentlichen glatten Abschnitt | |
DE2211645B2 (de) | Vorrichtung zum kuehlen der matrize einer strangpresse | |
DE102016204420A1 (de) | Abschrecktanksystem und Verfahren zur Anwendung | |
DE19637402C2 (de) | Bandgießen | |
EP0787542B1 (de) | Verfahren zur Herstellung von nahtlosen Rohren und Innenwerkzeug hierzu | |
DE6604790U (de) | Vorrichtung zum kontinuierlichen formen und galvanisieren duennwandiger metallroehren. | |
DE2558671C2 (de) | Kaltziehvorrichtung zum Reduzieren von Rohren | |
DE69007033T2 (de) | Warmwalzverfahren für nahtlose Rohre mit vorausgehender Verringerung des Durchmessers von Halbzeug. | |
DE1903475A1 (de) | Verfahren und Vorrichtung zum Vorbohren und Abschaelen von Barren zum nachfolgenden Extrudieren | |
DE2936635A1 (de) | Vorrichtung zum kuehlen eines heissen strangpressprofils nach dem strangpressvorgang | |
DE10316910B3 (de) | Verfahren zur Herstellung von Rohren aus metallischem Werkstoff | |
DE2045801A1 (en) | Thermoplastic granules - cooled with liquid coolant after extrusion and dried by their own remaining heat | |
DE2356985A1 (de) | Verfahren zur herstellung nahtloser metallischer rohre | |
DE1481159C3 (de) | Transport-, Rieht- oder Führungswalze für langsam fortbewegbare, auf hohem Temperaturniveau befindliche Stahlstränge, insbesondere für Stranggießanlagen | |
DE1924418A1 (de) | Verfahren und Vorrichtung zum Herstellen von Erzeugnissen aus Metall | |
DE708104C (de) | Strangpresse zur Herstellung von Rohren | |
DE2442375A1 (de) | Vorrichtung zur bearbeitung und kalibrierung der innenflaeche eines rohres | |
DE2548116B2 (de) | Vorrichtung zum Abschrecken eines erwärmten MetaUrohres | |
DE1300638B (de) | Stopfenverschluss fuer eine Giesspfanne | |
DE3825919C2 (de) | Vorrichtung zum Abtrennen der Schweißraupe von nahtgeschweißten Rohren | |
DE1807321A1 (de) | Verfahren und Anlage zur Warmherstellung von Rundhohlknueppeln aus einem stranggegossenen Hohlstahlblock |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE ES FR GB IT |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE ES FR GB IT |
|
17P | Request for examination filed |
Effective date: 19990128 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SMS DEMAG AG |
|
17Q | First examination report despatched |
Effective date: 20020201 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RTI1 | Title (correction) |
Free format text: METHOD OF MANUFACTURING SEAMLESS PIPES AND MANDREL THEREFOR |
|
RTI1 | Title (correction) |
Free format text: METHOD OF MANUFACTURING SEAMLESS PIPES AND MANDREL THEREFOR |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20031126 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REF | Corresponds to: |
Ref document number: 59711039 Country of ref document: DE Date of ref document: 20040108 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2206654 Country of ref document: ES Kind code of ref document: T3 |
|
GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 20031126 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20040827 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20060112 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20060113 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20060130 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20060131 Year of fee payment: 10 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070801 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20070930 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20070130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070129 |