EP1121991B1 - Verfahren zur Herstellung von Metallrohren - Google Patents
Verfahren zur Herstellung von Metallrohren Download PDFInfo
- Publication number
- EP1121991B1 EP1121991B1 EP00400311A EP00400311A EP1121991B1 EP 1121991 B1 EP1121991 B1 EP 1121991B1 EP 00400311 A EP00400311 A EP 00400311A EP 00400311 A EP00400311 A EP 00400311A EP 1121991 B1 EP1121991 B1 EP 1121991B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rollers
- forming
- metal band
- metal
- form rollers
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/08—Dies; Selection of material therefor; Cleaning thereof with section defined by rollers, balls, or the like
Definitions
- the invention relates to a method and an apparatus for producing Metal pipes according to the preamble of claim 1 and claim 3, (see e.g. US-A-3,260,099).
- the strip edges to be welded are free of grease and oxide and on the other others the strip edges are guided cleanly and exactly during the welding process butt against each other at the same height.
- the band edges of the trimmed degreased metal strip immediately before forming into a slotted tube.
- Forming tools made of steel have proven themselves for metal strips made of steel and copper, which consist of pairs of form rollers or form rollers.
- the metal band will be there gradually deformed into a slotted tube between the form rollers or form rollers.
- the disadvantage of this known device is the fact that by attacking the Brushing device, the surface of the form rollers or form rollers additionally stressed is removed and not only the cold-welded particles. This causes an additional one Wear on the form rollers or form rollers.
- the present invention is therefore based on the object, the described To avoid disadvantages and to provide a method and an apparatus in which cold welding of the tools is prevented from the outset.
- the main advantage of the invention is that the extremely high Hardness of the surface of the form rollers or form rollers the coefficient of friction between the belt and the form roller or the form roller is significantly reduced.
- the attainable hardness is five times higher than the hardness of conventional titanium nitride layers. It will achieved a coefficient of friction of well below 0.1.
- FIGS. 1 to 3 Exemplary embodiments explained in more detail.
- TOG welding arc welding under protective gas
- the first three form stages 4, 5 and 6 each consist of an upper form roller 4a, 5a and 6a and a lower form roller 4b, 5b and 6b, between which the Aluminum strip 1 is gradually converted into the tube shape.
- a vertical one Pair of form rollers 7 and a self-contained form ring 8 complete the Molding device 2.
- rollers 4a, 4b, 5a, 5b, 6a and 6b are suitably made of steel.
- the Rollers 4a, 5a, 5b, 6a and 6b can, however, be made of plastic, e.g. B. polyethylene, polyamide etc. exist.
- the roller 4b must always be made of steel, since this is the strongest is claimed.
- the shaping rollers 4a, 4b, 5a, 5b, 6a and 6b have if they are made of steel, a surface hardness of more than 100 GPa. This extremely high hardness is due to the incorporation of carbon atoms in the crystal lattice of the steel of the forming roller. The process developed for this is published in the magazine " MO metal surface "Carl Hanser Verlag 50th year 4/96 released.
- FIG. 2 shows a view of the first molding stage 4 with the molding rollers 4a and 4b, between which the edge areas of the unspecified metal strip are extreme be strongly deformed.
- the hardened surface of the form rollers 4a and 4b is shown in dashed lines and designated 9.
- FIG. 3 shows a section through a Turkish head that consists of the four rollers 11 a consists.
- the surface of the rollers also has a hardness of more than 100 GPa.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Metal Extraction Processes (AREA)
- Forging (AREA)
Description
Claims (4)
- Verfahren zur Herstellung von Metallrohren, bei dem ein dünnwandiges zur Kaltverschweißung neigendes Metallband (1) allmählich zum Schlitzrohr (3) geformt, die stumpf aneinanderliegenden Längskanten miteinander verschweißt werden und das geschweißte Rohr in seinem Durchmesser reduziert wird, wobei das Formen des Metallbandes zum Schlitzrohr durch gegenläufige paarweise zusammenarbeitende Formrollen (4a, 4b; 5a, 5b; 6a, 6b) oder Formwalzen aus Metall erfolgt und die Formrollen oder Formwalzen das zu verformende Metallband in seinem Kantenbereich mit rollender Reibung zwischen sich führen, dadurch gekennzeichnet, daß das Formen und Führen des Metallbandes mit Formrollen (4a, 4b; 5a, 5b; 6a, 6b) und/oder Formwalzen und das Reduzieren mit Rollen erfolgt, deren Oberflächenhärte höher als 100 GPa ist.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß in die Oberfläche der Formrollen oder Formwalzen Kohlenstoffatome zusätzlich integriert sind und die Oberfläche somit eine diamantähnliche Struktur großer Härte aufweist.
- Vorrichtung zur Herstellung von Metallrohren, mit einer ein dünnwandiges zur Kaltverschweißung neigendes Metallband (1) zum Schlitzrohr (3) formenden Formeinrichtung, einer die Längskanten des Schlitzrohres verschweißenden Schweißeinrichtung sowie einer den Durchmesser des Rohres reduzierenden Einrichtung, wobei die Formeinrichtung aus gegenläufigen paarweise zusammenarbeitenden Formrollen (4a, 4b; 5a, 5b; 6a, 6b) oder Formwalzen aus Metall besteht, welche das Metallband in seinem Kantenbereich mit rollender Reibung zwischen sich führen, dadurch gekennzeichnet, daß die Formrollen (4a, 4b; 5a, 5b; 6a, 6b) und/oder Formwalzen eine Oberflächenhärte von mehr als 100 GPa aufweisen und daß die Einrichtung zum Reduzieren des Rohrdurchmessers ein sogenannter Türkenkopf ist, dessen Rollen ebenfalls eine Oberflächenhärte von mehr als 100 GPa aufweisen.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß in die Oberfläche der Formrollen oder Formwalzen Kohlenstoffatome zusätzlich integriert sind und die Oberfläche somit eine diamantähnliche Struktur großer Härte aufweist.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT00400311T ATE229386T1 (de) | 2000-02-01 | 2000-02-01 | Verfahren zur herstellung von metallrohren |
DE50000912T DE50000912D1 (de) | 2000-02-01 | 2000-02-01 | Verfahren zur Herstellung von Metallrohren |
DK00400311T DK1121991T3 (da) | 2000-02-01 | 2000-02-01 | Fremgangsmåde til fremstilling af metalrør |
EP00400311A EP1121991B1 (de) | 2000-02-01 | 2000-02-01 | Verfahren zur Herstellung von Metallrohren |
ES00400311T ES2184682T3 (es) | 2000-02-01 | 2000-02-01 | Metodo para fabricar tubos de metal. |
US09/771,635 US6513699B2 (en) | 2000-02-01 | 2001-01-30 | Process for the production of metal pipes |
JP2001024554A JP2001246421A (ja) | 2000-02-01 | 2001-01-31 | 金属管製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00400311A EP1121991B1 (de) | 2000-02-01 | 2000-02-01 | Verfahren zur Herstellung von Metallrohren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1121991A1 EP1121991A1 (de) | 2001-08-08 |
EP1121991B1 true EP1121991B1 (de) | 2002-12-11 |
Family
ID=8173532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00400311A Expired - Lifetime EP1121991B1 (de) | 2000-02-01 | 2000-02-01 | Verfahren zur Herstellung von Metallrohren |
Country Status (7)
Country | Link |
---|---|
US (1) | US6513699B2 (de) |
EP (1) | EP1121991B1 (de) |
JP (1) | JP2001246421A (de) |
AT (1) | ATE229386T1 (de) |
DE (1) | DE50000912D1 (de) |
DK (1) | DK1121991T3 (de) |
ES (1) | ES2184682T3 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040250404A1 (en) * | 2003-01-14 | 2004-12-16 | Cripsey Timothy J. | Process for press forming metal tubes |
CN108895213A (zh) * | 2018-05-30 | 2018-11-27 | 浙江康盛股份有限公司 | 一种超薄壁管及其加工方法 |
EP3797890B1 (de) * | 2019-09-30 | 2024-03-27 | Nexans | Verfahren zur herstellung dünnwandiger hohlprofile kleiner durchmesser aus ne-metallen |
EP3797891B1 (de) | 2019-09-30 | 2023-08-02 | Nexans | Verfahren zur kontinuierlichen herstellung abschnittsweise gewellter, dünnwandiger hohlprofile kleiner durchmesser aus ne-metallen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260099A (en) * | 1964-07-28 | 1966-07-12 | Frank E Elge | Tube forming machine |
US3349832A (en) * | 1964-07-31 | 1967-10-31 | Simplex Wire & Cable Co | Method of forming sheathed conductor |
US3368379A (en) * | 1964-09-17 | 1968-02-13 | Simplex Wire & Cable Co | Tube closing device |
AT327140B (de) * | 1974-05-20 | 1976-01-12 | Plansee Metallwerk | Mit hartmetall bestuckte oder zur ganze aus hartmetall bestehende walzrollen sowie verfahren zu ihrer herstellung |
JP2842720B2 (ja) * | 1991-11-29 | 1999-01-06 | 京セラ株式会社 | 伸線用ダイスおよびその製造方法 |
JP3382968B2 (ja) * | 1992-06-12 | 2003-03-04 | 三菱アルミニウム株式会社 | 管製造用フォーミングロール、管製造方法及び電縫管 |
JPH0890092A (ja) * | 1994-09-19 | 1996-04-09 | Nanotetsuku Kk | 無潤滑絞り金型および無潤滑絞り加工方法 |
JPH1044140A (ja) * | 1996-07-31 | 1998-02-17 | Kyocera Corp | 加工用ローラー及びワイヤーソー |
-
2000
- 2000-02-01 AT AT00400311T patent/ATE229386T1/de active
- 2000-02-01 EP EP00400311A patent/EP1121991B1/de not_active Expired - Lifetime
- 2000-02-01 DE DE50000912T patent/DE50000912D1/de not_active Expired - Lifetime
- 2000-02-01 ES ES00400311T patent/ES2184682T3/es not_active Expired - Lifetime
- 2000-02-01 DK DK00400311T patent/DK1121991T3/da active
-
2001
- 2001-01-30 US US09/771,635 patent/US6513699B2/en not_active Expired - Fee Related
- 2001-01-31 JP JP2001024554A patent/JP2001246421A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
ES2184682T3 (es) | 2003-04-16 |
DK1121991T3 (da) | 2003-03-31 |
DE50000912D1 (de) | 2003-01-23 |
US6513699B2 (en) | 2003-02-04 |
EP1121991A1 (de) | 2001-08-08 |
US20010042773A1 (en) | 2001-11-22 |
JP2001246421A (ja) | 2001-09-11 |
ATE229386T1 (de) | 2002-12-15 |
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