DE3123645C2 - - Google Patents
Info
- Publication number
- DE3123645C2 DE3123645C2 DE19813123645 DE3123645A DE3123645C2 DE 3123645 C2 DE3123645 C2 DE 3123645C2 DE 19813123645 DE19813123645 DE 19813123645 DE 3123645 A DE3123645 A DE 3123645A DE 3123645 C2 DE3123645 C2 DE 3123645C2
- Authority
- DE
- Germany
- Prior art keywords
- water
- pipe
- mandrel
- roll gap
- basin
- 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 - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/023—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes by immersion in a bath
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/005—Copper or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B2045/0227—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for tubes
-
- 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)
- Metal Extraction Processes (AREA)
- Heat Treatment Of Articles (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung nahtlo ser Kupferrohre, bei dem ein rotglühender Kupferblock mittels eines Dorns und mindestens zweier schräg gestellter Walzen gelocht und gestreckt wird, und das gewalzte Rohr unmittelbar hinter dem Walzspalt in ein entleerbares Wasserbecken einge führt wird. Ferner betrifft die Erfindung eine Vorrichtung zur Durchführung dieses Verfahrens.The invention relates to a method for producing seamless ser copper pipes, in which a red-hot copper block by means of a mandrel and at least two inclined rollers is punched and stretched, and the rolled tube immediately inserted into an emptied water basin behind the roll gap leads. The invention further relates to a device to carry out this procedure.
Ein Verfahren der eingangs genannten Art ist beispielsweise aus der DE 29 08 458 A1 bekannt. Bei diesem Verfahren wird das warmgewalzte Metallrohr unmittelbar hinter dem Walzspalt in ein mit Wasser gefülltes Becken eingeführt. Hierbei be steht jedoch die Gefahr, daß Wasser durch den offenen Rohran fang in das Rohrinnere eintreten und die Bildung von Blasen auf der Innenoberfläche begünstigen kann. Zum Zweck eines vereinfachten Dornwechsels ist vorgesehen, den Wasserstand in einem hinter dem Walzspalt liegenden Teilbereich des Wasser beckens vollständig abzusenken.A method of the type mentioned at the outset is, for example known from DE 29 08 458 A1. With this procedure the hot-rolled metal pipe immediately behind the roll gap into a pool filled with water. Here be however, there is a risk that water will flow through the open pipe start entering the tube interior and the formation of bubbles can favor on the inner surface. For the purpose of one simplified mandrel change is provided, the water level in a portion of the water behind the roll gap completely lower the pool.
Auch bei dem aus der DE 23 56 985 A1 bekannten Verfahren wird das aus dem Walzspalt austretende Kupferrohr in ein hinter dem Walzenpaar angeordnetes Wasserbecken eingeführt. Auf die se Weise wird ein Kupferrohr mit oxidfreier Oberfläche erhal ten. Der wesentliche Vorteil dieses Verfahrens liegt darin, daß auf aufwendige und umweltschädliche Beizvorgänge zur Ent fernung der Oxidschicht verzichtet werden kann. The method known from DE 23 56 985 A1 is also used the copper pipe emerging from the roll gap into a rear the pool of water arranged introduced. On the In this way, a copper tube with an oxide-free surface is obtained The main advantage of this procedure is that that on complex and environmentally harmful pickling processes for Ent removal of the oxide layer can be dispensed with.
Es hat sich jedoch gezeigt, daß unter bestimmten Umständen die an der inneren Oberfläche der gewalzten Rohre auftreten den Blasen bei den nachfolgenden Arbeitsgängen, wie Pilgern und Ziehen zu Rohrabrissen führen können. Die Ursache für diese Blasen ist darin zu sehen, daß aus dem Wasserbecken Wasser in das offene Rohrende eintritt, bis in die unmittel bare Nähe des Dorns strömt und dort verdampft. Wenn nun auf grund der großen Beanspruchungen der Metallblock vor der Dornspitze aufreißt, kann Wasserdampf in diesen Bereich ein dringen und dort zu Blasen führen.However, it has been shown that under certain circumstances that occur on the inner surface of the rolled tubes the blisters in subsequent operations, such as pilgrims and pulling can lead to pipe breaks. The cause of these bubbles can be seen in that from the pool of water Water enters the open pipe end up to the immediate near the thorn flows and evaporates there. If now on due to the high stresses of the metal block in front of the If the mandrel tip tears open, water vapor can enter this area penetrate and cause bubbles there.
Der Erfindung liegt die Aufgabe zugrunde, das bekannte Ver fahren dahingehend zu verbessern, daß Blasen auf der Innen oberfläche gewalzter Rohre nicht mehr entstehen können.The invention has for its object the known Ver continue to improve that bubbles on the inside surface of rolled pipes can no longer arise.
Diese Aufgabe wird bei einem gattungsgemäßen Verfahren durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This task is accomplished in a generic method the characterizing features of claim 1 solved.
Durch die erfindungsgemäßen Maßnahmen ist sichergestellt, daß kein Wasser in das offene Rohrende eintreten kann. Eine äuße re Oxidation des Rohrs zu einem Zeitpunkt, in dem der Wasser stand des Wasserbeckens abgesenkt ist, wird durch das Besprü hen mit Wasser vermieden.The measures according to the invention ensure that no water can enter the open pipe end. An outer re oxidation of the pipe at a time when the water level of the water basin is lowered by the spraying avoided with water.
Nach einer bevorzugten Ausgestaltung des erfindungsgemäßen Verfahrens ist vorgesehen, in das Rohrinnere ein Schutzgas einzuleiten. Dieses Schutzgas verhindert, daß schädlicher Sauerstoff in den Bereich vor der Dornspitze gelangt, der dort ähnlich wie Wasserdampf zu Fehlern führen würde. Beson ders vorteilhaft ist es, das Schutzgas durch die mit einem Längskanal versehene Dornstange einzuleiten. According to a preferred embodiment of the invention The method provides for a protective gas in the interior of the tube initiate. This protective gas prevents harmful Oxygen gets into the area in front of the mandrel tip that there, like water vapor, would lead to errors. Especially it is advantageous to use a protective gas Introduce the mandrel rod provided along the longitudinal channel.
Eine Vorrichtung zur Durchführung des erfindungsgemäßen Ver fahrens, die aus einem Schrägwalzenpaar, einem an einer Dorn stange befestigten Dorn sowie einem in Durchlaufrichtung ge sehen hinter dem Walzspalt angeordneten Wasserkasten besteht, kann entsprechend derart ausgebildet werden, daß unmittelbar hinter dem Walzspalt in Abstand zueinander angeordnete ring förmige Sprühdüsen angeordnet und am Wasserkasten Mittel vor gesehen sind, die ein rasches Absenken und Anheben des Was serstands ermöglichen.A device for performing the Ver driving, consisting of a pair of diagonal rollers, one on a mandrel rod attached mandrel and a ge in the direction of flow see water box arranged behind the roll gap, can accordingly be designed such that immediately behind the roll gap spaced ring Shaped spray nozzles arranged and means in front of the water tank are seen, the rapid lowering and raising of the what enable serstands.
Anhand des in Figur dargestellten Ausführungsbeispiels soll die Erfindung noch näher erläutert werden.Based on the embodiment shown in Figure the invention will be explained in more detail.
Mittels eines nicht dargestellten Stößels wird ein Kupfer block 1 in den durch die Walzen 2 gebildeten Walzspalt einge schoben. Die Walzen 2 sind in einem Walzgerüst 3 angeordnet. Sie sind leicht schräg gestellt, so daß der Kupferblock 1 von ihnen weitertransportiert und dabei gleichzeitig um seine Längsachse gedreht wird. In den Walzspalt ragt ein Dorn 4 hinein, der an einer Dornstange 6 befestigt ist. Die Dorn stange ist in nicht dargestellter Weise in mehreren Führungen geführt und an einem Dornstangenhalter 7 befestigt. Der Kup ferblock 1 wird über den Dorn 4 gewalzt, so daß ein Rohr ent steht. Nach Fertigstellung des Rohrs wird die Dornstange 6 mit dem Dorn 4 aus dem Rohr gezogen und dieses seitlich abge worfen.By means of a plunger, not shown, a copper block 1 is inserted into the roll gap formed by the rollers 2 . The rollers 2 are arranged in a roll stand 3 . They are slightly inclined so that the copper block 1 is transported further by them and at the same time is rotated about its longitudinal axis. A mandrel 4 , which is fastened to a mandrel rod 6 , projects into the roll gap. The mandrel rod is guided in a manner not shown in several guides and attached to a mandrel rod holder 7 . The Kup ferblock 1 is rolled over the mandrel 4 so that a tube is ent. After completion of the tube, the mandrel rod 6 with the mandrel 4 is pulled out of the tube and this is thrown sideways.
Um eine Oxidation der Oberfläche des aus dem Walzspalt aus tretenden Rohrs zu verhindern, tritt das Rohr in einen Was serkasten 8 ein. Zu Beginn des Walzvorgangs ist der Wasser stand im Wasserkasten 8 so weit abgesenkt, daß das Rohr nicht mit dem Wasser im Wasserkasten 8 in Berührung kommt. Die Küh lung des Rohrs wird von mehreren Düsen 5 übernommen, von de nen jede angeschaltet wird, sobald der Rohranfang diese pas siert hat. Wesentlich dabei ist, daß kein Wasser in das Rohr innere dringen kann. Hat der Rohranfang die in Durchlaufrich tung gesehen letzte Sprühdüse 5 passiert, die in der Trenn wand 9 angeordnet ist, wird der Wasserstand im Wasserkasten 8 rasch angehoben (gestrichelte Linie), und die mittleren Düsen 5 werden abgeschaltet. Die in Durchlaufrichtung gesehen erste und letzte Düse bleiben eingeschaltet, um zu verhindern, daß Wasser aus den Durchtrittsöffnungen austritt. Zur beschleu nigten Füllung und Entleerung im Wasserkasten 8 dient eine Öffnung 10, die an eine leistungsstarke Pumpe angeschlossen ist. Ein Abfluß 11 sorgt dafür, daß das von dem Rohr abtrop fende Wasser ablaufen kann. Um zu verhindern, daß Sauerstoff in das Rohrinnere und insbesondere in den Bereich vor der Dornspitze gelangen kann, weist die Dornstange 6 einen Schutzgasanschluß 12 auf, durch den Schutzgas, z. B. Stick stoff, in das Innere des Rohrs eingeleitet wird.In order to prevent oxidation of the surface of the tube emerging from the roll gap, the tube enters a water box 8 . At the beginning of the rolling process, the water in the water box 8 was lowered so far that the tube does not come into contact with the water in the water box 8 . The cooling of the tube is taken over by several nozzles 5 , each of which is switched on as soon as the beginning of the tube has passed. It is essential that no water can penetrate the inner tube. Has the beginning of the pipe seen in Durchlaufrich direction last spray nozzle 5 , which is arranged in the partition 9 , the water level in the water tank 8 is raised quickly (dashed line), and the middle nozzles 5 are switched off. The first and last nozzles seen in the direction of flow remain switched on in order to prevent water from escaping from the passage openings. For accelerated filling and emptying in the water tank 8 is an opening 10 which is connected to a powerful pump. A drain 11 ensures that the water dripping from the pipe can drain. In order to prevent oxygen from getting into the interior of the tube and in particular into the area in front of the mandrel tip, the mandrel rod 6 has an inert gas connection 12 through which inert gas, e.g. B. stick material is introduced into the interior of the tube.
Mit Hilfe des erfindungsgemäßen Verfahrens ist es gelungen, Kupferblöcke zu Rohren zu verwalzen, die sowohl eine oxida tionsfreie äußere Oberfläche als auch eine blasenfreie innere Oberfläche aufweisen.With the aid of the method according to the invention, it has been possible to Roll copper blocks into tubes that are both an oxida tion-free outer surface as well as a bubble-free inner surface Have surface.
Claims (4)
- - daß der Wasserstand des Wasserbeckens zu Beginn des Walzvorgangs zunächst soweit abgesenkt wird, daß das gewalzte Rohr das Wasser becken oberhalb des abgesenkten Wasserstands durchläuft,
- - daß das gewalzte Rohr durch im Abstand zueinander angeordnete Wasserdüsen von außen mit Wasser besprüht wird, sobald der Rohr anfang an den Wasserdüsen vorbeigeführt ist
- - und daß anschließend der Wasserstand des Wasserbeckens wieder an gehoben wird, nachdem der Rohranfang das Wasserbecken verlassen hat.
- - that the water level of the water basin is lowered so far at the beginning of the rolling process that the rolled tube passes through the water basin above the lowered water level,
- - That the rolled pipe is sprayed with water from the outside by spaced water nozzles as soon as the pipe is initially guided past the water nozzles
- - And that the water level of the water basin is then raised again after the start of the pipe has left the water basin.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813123645 DE3123645A1 (en) | 1981-06-15 | 1981-06-15 | "METHOD FOR PRODUCING SEAMLESS COPPER PIPES" |
| EP81110522A EP0067906A3 (en) | 1981-06-15 | 1981-12-17 | Method for the production of seamless copper pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813123645 DE3123645A1 (en) | 1981-06-15 | 1981-06-15 | "METHOD FOR PRODUCING SEAMLESS COPPER PIPES" |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3123645A1 DE3123645A1 (en) | 1982-12-30 |
| DE3123645C2 true DE3123645C2 (en) | 1992-06-04 |
Family
ID=6134728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19813123645 Granted DE3123645A1 (en) | 1981-06-15 | 1981-06-15 | "METHOD FOR PRODUCING SEAMLESS COPPER PIPES" |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0067906A3 (en) |
| DE (1) | DE3123645A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19604969C2 (en) * | 1996-02-02 | 2000-08-24 | Sms Demag Ag | Process for the production of seamless pipes and internal tools |
| DE10107567A1 (en) * | 2001-02-17 | 2002-08-29 | Sms Meer Gmbh | Process for cold rolling seamless copper tubes |
| CN101994875B (en) * | 2009-08-25 | 2012-08-22 | 山东中佳新材料有限公司 | Method for manufacturing seamless copper pipe and rod core used for cold rolling mill |
| CN102773303B (en) * | 2012-07-16 | 2014-07-30 | 中国船舶重工集团公司第七二五研究所 | Copper nickel alloy large-size thick-wall seamless pipe manufacturing process |
| CN105436220B (en) * | 2015-12-01 | 2018-02-16 | 青岛华仁技术孵化器有限公司 | A kind of cold pilger mill endoporus degreaser |
| MX2020005684A (en) * | 2017-11-29 | 2020-12-03 | Nippon Steel Corp | Method for manufacturing seamless steel tube. |
| DE102019205724A1 (en) | 2019-04-18 | 2020-10-22 | Sms Group Gmbh | Cooling device for seamless steel pipes |
| CN110695092B (en) * | 2019-10-23 | 2024-06-04 | 广东海亮铜业有限公司 | Uninterrupted nitrogen purging system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE744177C (en) * | 1939-05-24 | 1944-01-11 | Dr Fritz Singer | Process for the cold forming of metal pipes that have been coated with oxide and ignition layers after the previous annealing treatment |
| CH339897A (en) * | 1954-12-01 | 1959-07-31 | Ici Ltd | Process for the production of copper wire coated with aluminum |
| US3036825A (en) * | 1957-05-17 | 1962-05-29 | Eisenmenger Friedrich | Process and apparatus for the continuous heat treating of elongated material |
| BE672269A (en) * | 1964-11-12 | 1900-01-01 | ||
| DE2054528C3 (en) * | 1970-11-05 | 1981-07-23 | Vsesojuznyj naučno-issledovatel'skij i konstruktorsko-technologičeskij institut trubnoj promyšlennosti, Dnepropetrovsk | Device for hardening pipes from the rolling heat |
| DE2356985A1 (en) * | 1973-11-15 | 1975-05-22 | Kabel Metallwerke Ghh | Hot-rolled seamless metal tubes mfr. - esp. of copper and copper alloys, using water or gas to prevent oxidn |
| FR223577A (en) * | 1973-12-11 | |||
| DE2506418A1 (en) * | 1975-02-15 | 1976-08-26 | Kabel Metallwerke Ghh | METAL PIPE HOT ROLLING METHOD |
-
1981
- 1981-06-15 DE DE19813123645 patent/DE3123645A1/en active Granted
- 1981-12-17 EP EP81110522A patent/EP0067906A3/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0067906A2 (en) | 1982-12-29 |
| EP0067906A3 (en) | 1983-03-30 |
| DE3123645A1 (en) | 1982-12-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8127 | New person/name/address of the applicant |
Owner name: KABEL- UND METALLWERKE GUTEHOFFNUNGSHUETTE AG, 450 |
|
| 8127 | New person/name/address of the applicant |
Owner name: KM-KABELMETAL AG, 4500 OSNABRUECK, DE |
|
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |