EP0335079A2 - Procédé et dispositif de fabrication de tuyaux à partir de loupes - Google Patents

Procédé et dispositif de fabrication de tuyaux à partir de loupes Download PDF

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Publication number
EP0335079A2
EP0335079A2 EP89101854A EP89101854A EP0335079A2 EP 0335079 A2 EP0335079 A2 EP 0335079A2 EP 89101854 A EP89101854 A EP 89101854A EP 89101854 A EP89101854 A EP 89101854A EP 0335079 A2 EP0335079 A2 EP 0335079A2
Authority
EP
European Patent Office
Prior art keywords
lubricant
wall
descaling agent
plug
head end
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.)
Withdrawn
Application number
EP89101854A
Other languages
German (de)
English (en)
Other versions
EP0335079A3 (fr
Inventor
Hansjörg Furrer
Raimo Peltoniemi
Norbert Richle
Dietrich Ulrich
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.)
Lonza AG
Original Assignee
Lonza AG
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 Lonza AG filed Critical Lonza AG
Publication of EP0335079A2 publication Critical patent/EP0335079A2/fr
Publication of EP0335079A3 publication Critical patent/EP0335079A3/fr
Withdrawn legal-status Critical Current

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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 and a device for processing slugs into tubes according to the preambles of claims 1 and 12.
  • a slug is understood to mean the hollow cylindrical intermediate product in the manufacture of pipes.
  • rolled round steel or round casting is usually punched in a cross-rolling mill using a piercing mandrel.
  • the slab is then rolled out in a stretching mill for further stretching and leveling the wall thickness. Rolling out is usually done in two work passages, so-called stitches.
  • the slug is driven by means of a pair of work rolls over a plug arranged at the head end of a mandrel bar, whereupon the plug is removed and the slug is returned by means of return rolls.
  • the second stitch uses a slightly larger plug than the first stitch. Then the inner wall of the blank is smoothed in a smooth rolling mill.
  • a descaling agent to which a lubricant is added, is introduced into the bowl. This is done, for example, by means of the device described in EP-A 250 881, which is brought and centered close to the void cavity by means of a displacement unit, whereupon an air stream loaded with the descaling agent is passed through the device into the void cavity. After the amount of air loaded with the descaling agent has flowed through the cavity, the device is withdrawn again by means of the displacement unit. After the exposure time required for descaling has elapsed, the first stitch is made.
  • a lubricant powder or granulate is introduced into the bowl. Since the two stitches are to be carried out in direct succession as far as possible (only interrupted by placing the second stopper on the mandrel bar), there is little time for the lubricant to be introduced. In the prior art, it is therefore thrown into the front end of the slug by a worker using a shovel. In the prior art, the same thing also occurs before smoothing in the smooth rolling mill: a worker throws a lubricant into the bowl with the help of a shovel.
  • the known introduction of the lubricant is disadvantageous for several reasons. Either an operator is used for this alone or the process is delayed if the operator responsible for fitting the stopper also has to introduce the lubricant. (With normal process times, the worker has to apply lubricant again approximately every 10 seconds, so that there is practically no time for other work). Throwing in the lubricant leads to an environmentally harmful dust cloud that is harmful to the operator. The lubrication is uneven and large amounts of lubricant are consumed, since throwing in the lubricant leads to an accumulation of lubricant in the front, lower part of the inner wall of the bowl, while the upper, rear areas of the inner wall of the bowl are not supplied with lubricant or only insufficiently.
  • the invention seeks to remedy this. It is based on the task of applying a lubricant and / or descaling agent for the respective processing evenly to the inside of the pan, in such a way that the processing is not delayed, i.e. the operations can be carried out in direct succession, and that there is as little environmental pollution as possible.
  • the lubricant and / or descaling agent during the respective operation i.e. during the movement of the slug in relation to the mandrel rod, is applied to the inner wall of the slug and preferably not to the wall surface to be machined during this operation, but - expediently with the aid of an inert carrier gas stream - through outlet openings at the head end or at the part of the adjoining it Mandrel bar on the inside of the already machined surface for further processing in the next step (second stitch or smoothing).
  • the application during the operation enables an automatic, even distribution of the agent over the inner wall of the pan; the preferred application to the already machined inner surface, expediently when propelling the slug through the part of the mandrel bar adjoining the stopper onto the immediately previously machined slug surface with the aid of inert gas, prevents scaling from the outset.
  • the agent can be a pure lubricant, but it can also contain a descaling agent in order to remove any scaling that occurs as soon as it occurs. (The time between processing in the first and that in the second stitch would be too short for complete descaling).
  • the plug mill shown schematically in FIGS. 1 and 2 has a pair of work rolls 1, 2 and a return roll pair 3, 4.
  • a guide part 8 On the head end 5 of a mandrel bar 6, which is supported against an abutment (not shown) behind the rolling mill, is a guide part 8 and a working part 9 of existing plug 10.
  • the head end 5 of the mandrel rod has an opening 11 for releasably holding the plug 10, in which a conical rear attachment 12 of the plug 10 is seated.
  • the rolling caliber 1, 2 and the stopper 10 form an annular gap which corresponds to the wall thickness of the plate 13 desired in the first pass.
  • a plurality of channels 17 extending from an axial bore 15 of the mandrel rod 6 to a circumferential groove 16 of the rod jacket are provided.
  • the channels 17 communicate through the bore 15 with a supply pipe 18 screwed into the rear end and welded to the part 14 for inert carrier gas (nitrogen) loaded with a lubricant and descaling agent (hereinafter referred to as lubricant for short) and thus run curved into the circumferential groove 16 that the carrier gas with swirl exits through it backwards (to the right in FIG. 1).
  • lubricant a lubricant and descaling agent
  • the feed tube 18 protrudes into a cavity 20 of the mandrel bar 6, which extends to the rear bar end (not shown) and is open at the rear.
  • a supply hose 21 is connected to the supply pipe 18 and is guided through the cavity 20 backwards out of the rod 6 to a loading device (not shown) for loading the carrier gas stream with the lubricant.
  • This device can be designed in accordance with the device described in the non-prior art CH patent application 177/88).
  • a cooling water line (not shown) which extends almost to the front end wall 23 of the cavity 20 and is led out of the cavity to a cooling water source (not shown).
  • the cooling water flowing out of the cooling water line during operation first cools the wall 23 and thus the front rod part 14 and, when flowing back through the cavity 20, also the entire remaining mandrel rod 6, whereupon it flows out of the cavity 20 at the rear (on the right in FIG. 1).
  • the hole 13 perforated in a cross-rolling mill by means of a piercing mandrel is descaled before being processed by the rolling mill shown in FIG Lubricant is added to the bowl.
  • the plate 13 is rolled out in a first pass of the rolling mill shown in FIG. 1. In this case, the plate 13 is driven in the direction of the arrow 26 by means of the work roll pair 1, 2 rotating in the direction of rotation 25, via the plug 10 placed on the head end 5 of the mandrel bar 6.
  • a nitrogen stream loaded with lubricant (lubricant powder or lubricant granules, if appropriate with additives) is fed through the feed line 21, 18, 15 and the channels 16 with swirl to the rear (in FIG. 1 to the right) on the inner wall of the plate 13.
  • the nitrogen stream loaded with the lubricant thus flows out behind the plug 10 with a swirl (to the rear), the lubricant being deposited evenly distributed on the inner wall of the cap which had just been processed by the plug.
  • the lubricant applied to the inner wall of the blank in the first stitch is therefore not used for lubrication in this but only in the next (second) stitch. Lubrication in the first stitch is ensured by the descaling agent introduced before the first stitch by means of the device described in EP-A 250 881, which acts simultaneously as a lubricant or is provided with an admixture of lubricant.
  • the start of the lubricant supply can be controlled by means of the loading device in such a way that the lubricant only emerges from the channels 17 after the plug 10 has already covered a certain feed path.
  • the lubricant supply is stopped, but the nitrogen flow through the supply line 21, 18, 15 and the channels 16 is maintained (continuously).
  • the plate 13 After the plate 13 has been driven completely over the stopper 10 and this has been removed, it is returned in the direction of the arrow 28 by means of the return roller pair 3, 4 rotating in the direction of rotation 27.
  • nitrogen is continuously blown through the supply line 21, 18, 15 and the channels 16. (The nitrogen flow can be reduced if no lubricant is added).
  • the cooling water which runs over the work rolls 1, 2, can spray onto the front part 14 of the mandrel bar 6. Since nitrogen constantly escapes through the channels 16, it cannot penetrate them, so that the risk of the channels becoming blocked as a result of the lubricant being mixed with the water is avoided.
  • the head end 30 of the mandrel rod 31 also has an opening 34 adapted to a rear extension 32 of the stopper 33.
  • the opening 34 merges into a cavity 36 in the front rod part, in which a z. B. provided with four wings 35 arranged on a feed pipe 37 for the lubricant swirl device 38 is.
  • the wings 35 are enclosed by a funnel 39, the funnel neck 40 of which sits on the feed pipe 37.
  • the wing arrangement is such that when the plug 33 is removed from the opening 34 and flows through the feed pipe 37 and is loaded with the lubricant, the carrier gas swirls through the funnel 39 and the opening 34.
  • a supply hose is connected to the supply pipe 37 through the cavity 20 of the rod 31 to the loading device.
  • the lubricant is not applied during the advance 26 of the bobbin (not shown in FIG. 3) but only during its return 28 - after the plug 33 has been removed . Initially, only nitrogen is fed through the feed line 37 by means of the loading device.
  • the lubricant supply is controlled by the loading device in such a way that the lubricant does not emerge from the swirl generator 38 until after the blower has covered a part of the return path by means of the return rollers which is so large that the lubricant of the carrier gas stream escaping with swirl is (almost) completely settles on the inner wall of the blanks and at most a negligibly small proportion of the lubricant emerges from the end of the blanks. Up to the end of the return path, lubricant is then discharged through the swirler 38 by means of the carrier gas flow, so that the entire inner wall of the slug is evenly covered with the lubricant.
  • the lubricant applied with the variant of FIGS. 3 and 4 in the first stitch also serves to lubricate the stopper in the second stitch.
  • the second stitch is corresponding to the first stitch during the return of the slug, lubricant is again applied by the swirl sensor 38 to the inner wall of the slug processed by the plug 33 during the advance 26 for smoothing in a third operation.
  • the exemplary embodiment shown in FIGS. 1 and 2 has the advantage over the procedure in FIGS. 3 and 4 that the lubricant is applied immediately after the processing of the inner wall, so that scaling can practically not occur from the outset and that also acts as a descaling agent , or lubricants containing descaling agents can act longer.
  • the exemplary embodiment shown in FIGS. 3 and 4 has the structural advantage over the one shown in FIGS. 1 and 2 that no lateral bores are required in the mandrel rod, so that this can be carried out in a simpler and more stable manner in terms of production.
  • the outlet-side ends of the channels 17 are directed backwards (to the right in FIG. 1).
  • the carrier gas stream loaded with the lubricant therefore emerges with a swirl backwards (to the right in FIG. 1).
  • This is useful if the channels 17 are arranged near the head end 5, since otherwise the swirl of the propellant gas escaping during the propulsion 26 at the stopper 9 is broken and thus the uniformity of the lubricant distribution can be impaired and also the lubricant when the stopper 10 falls out at the end of the drive 26 can emerge from the end of the slug under environmental pollution if the lubricant supply is not interrupted at exactly the right time.
  • the channels 17 can also in one Radial plane (curved) run, although a uniform distribution can only be achieved with a large number of channels, or run forward (in the direction of arrow 28) into the circumferential groove 16. In the latter case, they are expediently arranged somewhat further to the rear with a correspondingly longer part 14, the plug 10 in any case preventing lubricant from escaping from the front of the billet during the advance.
  • lubricant could in principle be discharged onto the inner wall both during propulsion 26 and during return 28 of the blank. However, it does not have to be discharged twice and only uses an unnecessarily large amount of lubricant.
  • the lubricant to be applied to the shell wall can be composed in such a way that it also acts as a kind of prophylactic descaling agent, i.e. scaling is prevented as it arises, and depending on the slug material and the processing process (second stitch or smoothing) for which it is applied, it can be provided with suitable additives.
  • the lubricant is preferably applied with an inert carrier gas stream, in particular nitrogen, and the inert carrier gas stream (even without loading with the lubricant) is constantly maintained, possibly reduced, so that scaling can be largely prevented from the outset.
  • a pure lubricant (lubricant) can therefore be used, especially if sufficient inert gas is supplied.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Lubricants (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Metal Rolling (AREA)
EP19890101854 1988-03-30 1989-02-03 Procédé et dispositif de fabrication de tuyaux à partir de loupes Withdrawn EP0335079A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1203/88A CH674477A5 (fr) 1988-03-30 1988-03-30
CH1203/88 1988-03-30

Publications (2)

Publication Number Publication Date
EP0335079A2 true EP0335079A2 (fr) 1989-10-04
EP0335079A3 EP0335079A3 (fr) 1991-09-18

Family

ID=4204917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890101854 Withdrawn EP0335079A3 (fr) 1988-03-30 1989-02-03 Procédé et dispositif de fabrication de tuyaux à partir de loupes

Country Status (6)

Country Link
US (1) US5016456A (fr)
EP (1) EP0335079A3 (fr)
JP (1) JPH01278903A (fr)
CN (1) CN1015342B (fr)
AR (1) AR240265A1 (fr)
CH (1) CH674477A5 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0698426A1 (fr) 1994-08-18 1996-02-28 MANNESMANN Aktiengesellschaft Changeur de poinçon pour laminoirs perceurs

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5533375A (en) * 1994-07-14 1996-07-09 Industrial Technology Research Institute Method for making seamless tubes from hollow billets
JP3368834B2 (ja) * 1998-07-24 2003-01-20 住友金属工業株式会社 継目無鋼管の製造方法および内面品質に優れた継目無鋼管
BRPI0609605B1 (pt) * 2005-03-31 2019-07-02 Nippon Steel & Sumitomo Metal Corporation Método de fabricação de tubo sem costura
CN103025445B (zh) 2010-06-08 2016-07-06 涂层处理瑞士有限责任公司 生产无缝管的方法
DE102012019025A1 (de) * 2012-09-26 2014-03-27 Sms Meer Gmbh Deoxidation von schräggewalzten Hohlblöcken
CN103240274A (zh) * 2013-05-10 2013-08-14 攀钢集团成都钢钒有限公司 穿孔机顶头装置、穿孔机以及无缝钢管生产方法
CN110355208A (zh) * 2019-07-31 2019-10-22 扬州诚德钢管有限公司 一种穿孔顶杆顶头冷却和毛管内吹氮气抗氧化装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE594215C (de) * 1932-06-21 1934-03-19 Leo Becker Schraegwalzwerk oder Rohrpresse zur Herstellung von nahtlosen Rohren
USRE21957E (en) * 1941-11-25 Means for cooling piercing points of
JPS5012391B1 (fr) * 1968-07-16 1975-05-12
JPS569008A (en) * 1979-07-04 1981-01-29 Kawasaki Steel Corp Lubricant feeder of plug mill
SU820939A1 (ru) * 1979-07-10 1981-04-25 Днепропетровский Ордена Трудовогокрасного Знамени Металлургическийинститут Оправка прошивного стана
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
JPS61137613A (ja) * 1984-12-11 1986-06-25 Kawasaki Steel Corp プラグミル圧延方法およびプラグミル
JPS62286610A (ja) * 1986-06-04 1987-12-12 Sumitomo Metal Ind Ltd 熱間継目無鋼管の製法
EP0250881A1 (fr) * 1986-07-03 1988-01-07 Lonza Ag Procédé pour déposer un matériau fluide sur la face interne d'un corps creux et dispositif pour la mise en oeuvre du procédé
SU1435337A1 (ru) * 1985-11-29 1988-11-07 Днепропетровский Металлургический Институт Им.Л.И.Брежнева Внутренний инструмент косовалкового стана

Family Cites Families (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735814A (en) * 1956-02-21 Die forging compound
US670756A (en) * 1900-12-20 1901-03-26 Ball Hanno Machine Works Sheave.
US984569A (en) * 1910-03-31 1911-02-21 Max Koch Rolling-mill for metal tubes.
US998762A (en) * 1911-05-19 1911-07-25 Cement Appliances Company Apparatus for combining comminuted solids and liquid.
US1945929A (en) * 1932-03-14 1934-02-06 Nat Tube Co Manufacture of seamless tubes
US2017389A (en) * 1932-06-02 1935-10-15 Nat Tube Co Mill mandrel bar
US2176879A (en) * 1937-11-20 1939-10-24 Acheson Colloids Corp Method of disintegrating, dispersing and stabilizing graphite and product
US2588625A (en) * 1945-03-15 1952-03-11 Aluminum Co Of America Forging lubricant and method of using same
NL88376C (fr) * 1952-04-30
US3198735A (en) * 1961-10-20 1965-08-03 Edward R Lamson Solid lubricant composition and method for lubricating anti-friction bearing structures
US3242075A (en) * 1962-04-09 1966-03-22 Acheson Ind Inc High temperature lubricant
US3341454A (en) * 1963-02-25 1967-09-12 Hodson Corp Lubricant composition
NL130355C (fr) * 1964-09-09
US3344065A (en) * 1965-01-25 1967-09-26 Molykote Produktions G M B H Extreme pressure lubricants
US3384580A (en) * 1967-05-09 1968-05-21 Acheson Ind Inc Graphite dispersions
GB1223562A (en) * 1967-09-05 1971-02-24 British Petroleum Co Improved method of preparing oleophilic compounds
US3472770A (en) * 1967-09-08 1969-10-14 Chevron Res Novel pinion grease
US3838048A (en) * 1968-06-17 1974-09-24 Diamond Shamrock Corp Polyvinylfluoride bearings
GB1287331A (en) * 1970-01-29 1972-08-31 Ciba Geigy Uk Ltd Phosphorodithioic acid esters
GB1374976A (en) * 1970-12-01 1974-11-20 British Petroleum Co Oleophilic graphite
US3801504A (en) * 1971-03-22 1974-04-02 Texaco Inc Non-flammable water based hot forging lubricating compositions
US3908038A (en) * 1973-03-28 1975-09-23 Allied Chem Thermoplastic molding compositions
US3833502A (en) * 1973-04-30 1974-09-03 Nalco Chemical Co Method for improving the adherence of metalworking coolants to metal surfaces
US4055503A (en) * 1973-10-11 1977-10-25 Robert Bosch G.M.B.H. Lubricating powder and method of producing same and relatively slideable components
GB1438215A (en) * 1974-05-08 1976-06-03 Lonz Ltd High temperature lubricant
CH596294A5 (en) * 1974-05-08 1978-03-15 Lonza Ag High temp. lubricants for hot forming of metals
CH609728A5 (en) * 1974-09-06 1979-03-15 Lonza Ag High temperature lubricant for the hot-forming of metals
DE2430249C3 (de) * 1974-06-24 1977-03-17 Chemische Fabrik Budenheim Rudolf A. Oetker, 6501 Budenheim Hochtemperaturschmierstoff fuer die heissumformung von metallen
US4039337A (en) * 1974-10-23 1977-08-02 Ball Brothers Research Corporation Release coating for glass manufacture
US3994847A (en) * 1974-12-30 1976-11-30 Ball Corporation Aqueous dispersion of polyphenylene sulfide metal phosphate binder and solid lubricant for glass molds coating
US4050932A (en) * 1975-04-07 1977-09-27 General Motors Corporation Colloidal graphite forging lubricant and method
US4104178A (en) * 1975-10-24 1978-08-01 Wyman-Gordon Company Water-based forging lubricant
US3983042A (en) * 1975-10-24 1976-09-28 Wyman-Gordon Company Water-based forging lubricant
CA1075223A (fr) * 1975-12-12 1980-04-08 Donald G. Needham Produit anti-friction a base de poly (sulfure d'arylene)
US4090666A (en) * 1976-05-19 1978-05-23 Coors Container Company Gun for tribo charging powder
US4055025A (en) * 1976-11-22 1977-10-25 Union Carbide Corporation Apparatus for improved cleaning of pipeline inlets
GB1600734A (en) * 1977-03-08 1981-10-21 British Petroleum Co Fire resistant grease
US4321295A (en) * 1977-12-23 1982-03-23 Ramu International Modified graphite and process for using same
GB1569730A (en) * 1978-05-30 1980-06-18 Ciba Geigy Ag 0,0-diiso-propyl-s-(2-carboethoxyethyl)-phosphorodithioate and lubricating oil compositions containing it
US4206060A (en) * 1978-10-23 1980-06-03 Sumitomo Kinzoku Kogyo Kabushiki Kaisha Bolt and nut unit coated with lubricant
FR2440985A1 (fr) * 1978-11-07 1980-06-06 Nord Tech Rech Applic Compositions additives pour huile pour moteurs a combustion interne
DE2849617A1 (de) * 1978-11-15 1980-05-29 Dow Corning Gmbh Waessriges schmiermittel
US4228020A (en) * 1979-05-04 1980-10-14 Edwin Cooper, Inc. Lubricating oil composition
US4357249A (en) * 1980-09-11 1982-11-02 Arguto, Inc. Self-lubricating bearing and the like, and method of making same
US4470939A (en) * 1980-09-25 1984-09-11 Duracell Inc. Method of electrode formation
SU981351A1 (ru) * 1981-05-08 1982-12-15 Ждановский металлургический институт Смазка дл обработки металлов давлением
JPS58116910A (ja) * 1981-12-30 1983-07-12 Nippon Steel Corp 管圧延における潤滑法
SU1030405A1 (ru) * 1982-04-09 1983-07-23 Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский И Конструкторско-Технологический Институт Трубной Промышленности Смазка дл гор чей обработки металлов давлением
GB2123917B (en) * 1982-04-30 1986-02-12 Hakko Co Lining underground pipes
JPS5918799A (ja) * 1982-07-23 1984-01-31 Nippon Steel Corp 鋼材の熱間成形用潤滑剤
US4452169A (en) * 1982-09-24 1984-06-05 Shinich Matsuda Reviving apparatus for fluid passages
ZA84247B (en) * 1983-02-18 1984-09-26 Lonza Ag Parting and lubricating agent in solid form
IT1160196B (it) * 1983-02-24 1987-03-04 Dalmine Spa Procedimento di disossidazione a caldo di tubi metallici semilavorati
CH655516B (fr) * 1983-08-17 1986-04-30
WO1985001155A1 (fr) * 1983-08-30 1985-03-14 Mitsui Toatsu Chemicals, Inc. Cellule a iode
US4687598A (en) * 1983-11-07 1987-08-18 The United States Of America As Represented By The United States Department Of Energy Electrode-active material for electrochemical batteries and method of preparation
US4702860A (en) * 1984-06-15 1987-10-27 Nauchno-Issledovatelsky Institut Kabelnoi Promyshlennosti Po "Sredazkabel" Current-conducting composition
DE3432288A1 (de) * 1984-09-01 1986-03-13 Kocks Technik Gmbh & Co, 4010 Hilden Verfahren und anlage zum herstellen nahtloser rohre
US4668534A (en) * 1986-01-21 1987-05-26 Ben E. Meyers Method and apparatus for applying fusion bonded powder coatings to the internal diameter of tubular goods

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE21957E (en) * 1941-11-25 Means for cooling piercing points of
DE594215C (de) * 1932-06-21 1934-03-19 Leo Becker Schraegwalzwerk oder Rohrpresse zur Herstellung von nahtlosen Rohren
JPS5012391B1 (fr) * 1968-07-16 1975-05-12
JPS569008A (en) * 1979-07-04 1981-01-29 Kawasaki Steel Corp Lubricant feeder of plug mill
SU820939A1 (ru) * 1979-07-10 1981-04-25 Днепропетровский Ордена Трудовогокрасного Знамени Металлургическийинститут Оправка прошивного стана
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
JPS61137613A (ja) * 1984-12-11 1986-06-25 Kawasaki Steel Corp プラグミル圧延方法およびプラグミル
SU1435337A1 (ru) * 1985-11-29 1988-11-07 Днепропетровский Металлургический Институт Им.Л.И.Брежнева Внутренний инструмент косовалкового стана
JPS62286610A (ja) * 1986-06-04 1987-12-12 Sumitomo Metal Ind Ltd 熱間継目無鋼管の製法
EP0250881A1 (fr) * 1986-07-03 1988-01-07 Lonza Ag Procédé pour déposer un matériau fluide sur la face interne d'un corps creux et dispositif pour la mise en oeuvre du procédé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0698426A1 (fr) 1994-08-18 1996-02-28 MANNESMANN Aktiengesellschaft Changeur de poinçon pour laminoirs perceurs
US5584203A (en) * 1994-08-18 1996-12-17 Mannesmann Aktiengesellschaft Rolling mandrel changing device for a plug mill

Also Published As

Publication number Publication date
AR240265A1 (es) 1990-03-30
CN1015342B (zh) 1992-02-05
CN1037100A (zh) 1989-11-15
JPH01278903A (ja) 1989-11-09
CH674477A5 (fr) 1990-06-15
US5016456A (en) 1991-05-21
EP0335079A3 (fr) 1991-09-18

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