EP0698426A1 - Changeur de poinçon pour laminoirs perceurs - Google Patents

Changeur de poinçon pour laminoirs perceurs Download PDF

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Publication number
EP0698426A1
EP0698426A1 EP95250192A EP95250192A EP0698426A1 EP 0698426 A1 EP0698426 A1 EP 0698426A1 EP 95250192 A EP95250192 A EP 95250192A EP 95250192 A EP95250192 A EP 95250192A EP 0698426 A1 EP0698426 A1 EP 0698426A1
Authority
EP
European Patent Office
Prior art keywords
rolling
mandrels
mandrel
station
cooling
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Withdrawn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
EP95250192A
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German (de)
English (en)
Inventor
Hans Eversberg
Burkhard Schifferings
Karl-Heinz Häusler
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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
Priority claimed from DE19527771A external-priority patent/DE19527771A1/de
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0698426A1 publication Critical patent/EP0698426A1/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Withdrawn legal-status Critical Current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
    • B21B25/06—Interchanging mandrels, fixing plugs on mandrel rods or cooling during interchanging mandrels

Definitions

  • the invention relates to a mandrel changing device for the mandrels of a plug rolling system.
  • Various types of internal tools are used for rolling seamless steel tubes in diagonal and longitudinal rolling systems, e.g. Perforated mandrels in perforated cross rolling plants, smoothing plugs in smooth cross rolling plants and plugs in plug or boot rolling plants. It is common to all systems that the tools become heavy with larger pipe diameters and that they have to be replaced - in the plug rolling process e.g. after each stitch - manual physical work means why mechanically changing devices are used.
  • Such a device for plug rolling stands is e.g. described in DE-PS 27 59 919.
  • a set of two or more plugs are inserted into a change wheel that has a number of pockets. For each new stitch, the wheel is turned one pocket division and thus a new plug is brought into the working position.
  • the used stopper slides over a gutter into the lower part of the change wheel under water.
  • DE-OS 27 01 824 describes a plug rolling process with a cylindrical rolling mandrel that can be moved during rolling. Instead of the usual short plug, a rolling mandrel is used here longer length used, the length is determined by the travel. As far as is known, this method has not been used in practice.
  • DE-OS 42 13 276 describes a plug rolling process for rolling pipes with the same wall, the use of which requires the smoothing mills that are otherwise required.
  • a particularly uniform wall thickness is achieved through targeted different setting of the rollers in the successive passes.
  • Modern methods for the local measurement of hot wall thicknesses installed immediately after the roll stand allow an immediate conclusion to be drawn about the wall thickness distribution in the circumferential direction of the pipe just rolled. In order to take advantage of this, flexible adjustment of the rollers is of great benefit.
  • Newly developed lubricants mean that the process according to DE-OS 27 01 824 is up to date again.
  • a cylindrical rolling mandrel that can be displaced during rolling only takes full effect if it is well lubricated and if the tube blank itself - as described in EP-A1 03 35 079 - is lubricated and deoxidized on the inside. It is also advantageous to lubricate and deoxidize the hollow block on the inside before the first plug stitch. In this way, the harmful influence of the scale is prevented, which can accumulate on the plugs or rolling mandrels and lead to longitudinal grooves in the pipe.
  • stopper rolling which means two stops in two-pass operation. This ensures that the tube wall thickness is not influenced by different plug diameters, as can arise from different wear, if more than one set of plugs is used. This rule can be deviated from if there are facilities for measuring the hot local wall thickness after the plug rolling stand and there is a possibility of individually adjusting the rolls after each pass.
  • a rolling mandrel series is the number of rolling mandrels in circulation to cover all processing stations.
  • a series consists of several - but at least two - sets of rolling mandrels.
  • the device can be designed for only one series of two or more sets of rolling mandrels or for the use of two series of rolling mandrels, but can also be operated with only one series.
  • the rolling mandrel changing device can be preceded by a heating device in which the rolling mandrels are heated to the required lubrication temperature when they are used for the first time.
  • the workflow of the mandrel changing device according to the invention is shown in two flow diagrams, each separately for the circulation with one (Fig. 1) and with two mandrel series (Fig. 2).
  • the process and mode of operation of the The device according to the invention is described below.
  • the functions are explained by FIGS. 3 to 5.
  • the following description relates to the functional sequence according to FIG. 1 when working with only one rolling mandrel series.
  • the number of mandrels that form a series corresponds to the number of main stations shown, namely six. If two different rolling mandrel diameters are used, three of these are pre-rolling mandrels and three finish-rolling mandrels. These mandrels pass through the subsequent stations one after the other, ie a roughing mandrel is always followed by a finishing mandrel.
  • the processing time in each of the individual stations corresponds to half the cycle time of the plug rolling mill, since each tube is rolled using two mandrels. If, on the other hand, you are working with three mandrels, ie two roughing and one finishing mandrel, the cycle time for each mandrel is third. In both cases, the process is as follows:
  • the used rolling mandrel 10 slips out of the roll gap in a manner known to the person skilled in the art via a downwardly inclined and horizontally pivotable track 11 into a collecting station 12.
  • the longitudinally displaceable support rod is marked, on which the rolling mandrel 10 is supported during rolling.
  • the support rod 13 is in its end position, which it assumes immediately after the rolling process.
  • the two rolls 14 of the plug rolling stand, not shown, are still open in order to let the rolled tube drawn through opposite to the rolling direction and also not shown pass through.
  • the rolling mandrel 10 is inserted into the cooling and descaling station 4 by means of a transport element 15.
  • the transport element 15 is shown in FIG. 4 as a so-called walking beam transport which, due to its vertical circular movement, lifts the rolling mandrels from one station to the other.
  • the cooling and descaling station 4 consists of a space in which, for example, a mixture of air and water is sprayed through the spray nozzles 16 after the rolling mandrel 10n has been inserted until the rolling mandrel 10n has reached the required low temperature.
  • the rolling mandrel 10n is now passed on to the drying station 5, where it is heated by its own heat or, if necessary, additionally by the hot air nozzles 19, infrared radiators or the like, which are shown as examples. is dried.
  • the rolling mandrel 10n is then placed on a run-off slope 20 by the transport element 15 and rolls into a collecting trough 21.
  • This collecting trough 21 is lifted into an upper level by the lifting device 22, tilted and the rolling mandrel 10n is emptied into the collecting trough 33 of the intermediate station 6 via a second bevel 23.
  • the rolling mandrel 10n is checked for its further usability and either left in circulation or detected by means of a further transport device 24 and made for storage 8. Subsequently, a new rolling mandrel 10n must be removed from the storage facility 9 by the transport device 24 and incorporated into the gap that has arisen.
  • the rolling mandrels can be heated by the heating device 25 to a temperature which allows the water-containing lubricant applied to the rolling mandrel 10n to be dried. Lubrication and possibly additional drying are carried out in the lubrication station 7.
  • the rolling mandrel 10n was transported into the lubrication station 7 with a transport element of the same type as that shown in item 15.
  • 26 means the spray nozzle (s) for applying the lubricant suspension. After a short wait, the lubricant suspension has dried and adheres to the surface of the mandrel as a film. Drying can also be supported by a number of hot air nozzles 19n.
  • the lubricated and dried rolling mandrel 10n is now fed into the collecting trough 27 of the waiting position 1. From here it is passed through the ejector 28 via the run-off slope 29 into the receiving channel 30, which is also shown in the side view in FIG. 3.
  • FIG. 5 shows a top view of FIG. 4. This FIG. 5 shows the schematic arrangement of the individual stations. Starting from the collecting station 3 with the collecting channel 12, which is only available once, the rolling mandrel 10n of the cooling and descaling station 4 or the parallel one for this purpose, the second cooling and descaling station 4a arranged on the same level is supplied.
  • the arrows between these two stations indicate that the mandrel 10n can be transported out of the lower distributor channel 31 either to the right or to the left to the stations 4 or 4a.
  • the dashed arrow shows the transport direction of the lower level, the solid arrow that of the upper level.
  • the type of transport is left open here. It can be, for example, tappets that push the rolling mandrel 10n out of the lower distribution channel 31 either to the left or to the right. From here, the mandrel 10n passes through the individual stations in the manner already described. Since the tray 8 and the storage facility 9 are only present once, the transport device 24 has the task here of appropriately distributing the rolling mandrels between the individual stations 6, 6a, 8 and 9, i.e. either from 6 and 6a to 8 or from 9 to 6 or 6a.
  • the rolling mandrels are again combined in the upper distributor channel 32 - which is located in the plane above the lower distributor channel 31 - and from here inserted into the feed channel of the insertion station 2.
  • FIG. 5 shows one of the several basic arrangements in which the individual processing stations can be arranged.
  • the two circulations to the right and left of the inlet of the plug rolling mill.
  • stations 8 and 9 would also have to be planned twice.
  • the individual stations cannot be arranged one above the other, but next to one another on a common level. In this way, the formerly lower stations are more easily accessible, but require a larger area.
  • plug rolling and rolling mandrel preparation from one another in terms of time and location. This can be done by collecting the used plugs in containers after the good-bad control. These containers are transported to a processing device for the rolling mandrels, which is set up locally regardless of the location of the plug rolling mill.
  • Reprocessed and lubricated mandrels are collected in the other containers, transported back to the rolling mill and used again. Transport can be systematized by precisely positioning the rolling mandrels in the containers so that the containers can be designed, for example, as a magazine. The rolling mandrels can then be removed from the magazine in a targeted manner by a manipulator and fed to the rolling mill.
  • the magazines form a circuit between the rolling mill and the processing device for the rolling mandrels.
  • An advantage of this variant is that the processing of the rolling mandrels can take place independently of the cycle time of the plug rolling mill.
  • the processing time can thus be extended and optimized. If, for example, the processing device works in three shifts and the plug rolling mill only in two shifts, the third shift is available as an additional processing time. It is also possible to optimize the machining equipment so that several mandrels are cooled, descaled, dried and lubricated in one station. The capacity of the processing device is increased considerably and the treatment time of the individual mandrels is extended again.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP95250192A 1994-08-18 1995-08-07 Changeur de poinçon pour laminoirs perceurs Withdrawn EP0698426A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4430576 1994-08-18
DE4430576 1994-08-18
DE19527771 1995-07-21
DE19527771A DE19527771A1 (de) 1994-08-18 1995-07-21 Walzdornwechselvorrichtung für Stopfenwalzwerke

Publications (1)

Publication Number Publication Date
EP0698426A1 true EP0698426A1 (fr) 1996-02-28

Family

ID=25939609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95250192A Withdrawn EP0698426A1 (fr) 1994-08-18 1995-08-07 Changeur de poinçon pour laminoirs perceurs

Country Status (5)

Country Link
US (1) US5584203A (fr)
EP (1) EP0698426A1 (fr)
JP (1) JPH08168802A (fr)
CN (1) CN1137426A (fr)
CZ (1) CZ212295A3 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10229081B4 (de) * 2002-06-28 2007-07-19 Contitech Luftfedersysteme Gmbh Verfahren zum Trennen von Schläuchen und Vorrichtung zur Durchführung des Verfahrens
JP2006212645A (ja) * 2005-02-01 2006-08-17 Sumitomo Metal Ind Ltd ピアサーへの芯金・プラグ循環供給設備及び方法
JP4688037B2 (ja) * 2006-03-31 2011-05-25 住友金属工業株式会社 継目無鋼管の製造方法及び酸化性ガス供給装置
DE102006037962A1 (de) * 2006-08-12 2008-02-14 Sms Demag Ag Wickelofen
EP2198984B1 (fr) * 2007-11-01 2016-12-14 Nippon Steel & Sumitomo Metal Corporation Poinçon de perforation, procédé de régénération de poinçon de perforation, et ligne de production de régénération pour poinçon de perforation
CN101204719B (zh) * 2007-12-01 2010-06-02 太原重工股份有限公司 用于拔伸压机的芯棒循环装置
CN101664878B (zh) * 2008-09-05 2011-08-17 宋长洪 铜棒挤压冷却切割装置
DE102009053166B4 (de) * 2009-11-02 2015-02-19 V & M Deutschland Gmbh Verfahren und Einrichtung zum optimierten Stangenumlauf bei der Herstellung eines nahtlos warmgefertigten Stahlrohres nach dem Rohrkontiverfahren
CN103433283A (zh) * 2013-08-28 2013-12-11 无锡欧龙特种钢管有限公司 一种轧管机石墨芯棒吹水装置
DE102014008835A1 (de) 2014-02-20 2015-08-20 Sms Meer Gmbh Innenwerkzeug, Innenwerkzeug-Datenbank und Verfahren zum Umformen von Werkstücken mittels eines Innenwerkzeugs
CN108723090A (zh) * 2018-07-12 2018-11-02 江苏常宝普莱森钢管有限公司 芯棒加工装置及加工系统
CN109500086B (zh) * 2018-12-29 2024-05-17 北京京诚瑞信长材工程技术有限公司 穿孔机顶头更换装置及方法
CN112317541B (zh) * 2020-10-23 2022-08-05 太原科技大学 一种离线轧管顶头自动装卸装置
CN112718868A (zh) * 2020-12-10 2021-04-30 太原重工股份有限公司 热旋扩钢管内表面麻坑消除系统和工艺

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2080943A1 (fr) * 1970-01-30 1971-11-26 Mannesmann Ag
FR2194492A1 (fr) * 1972-08-02 1974-03-01 Algoma Steel Corp Ltd
DE2701824A1 (de) 1976-01-19 1977-07-21 Vallourec Lorraine Escaut Walzwerk zur herstellung von nahtlosen rohren
JPS57152308A (en) * 1981-03-16 1982-09-20 Kawasaki Steel Corp Controlling method of screw-down of plug type rolling mill
EP0076170A1 (fr) * 1981-09-30 1983-04-06 The Head Wrightson Machine Company Limited Lubrification de mandrins
JPS58167006A (ja) * 1982-03-26 1983-10-03 Nippon Kokan Kk <Nkk> 継目無鋼管熱間圧延機のマンドレルバ−交換方法
DE2759919C2 (fr) 1976-05-04 1987-07-23 White Consolidated Industries, Inc., Cleveland, Ohio, Us
EP0335079A2 (fr) 1988-03-30 1989-10-04 Lonza Ag Procédé et dispositif de fabrication de tuyaux à partir de loupes
DE4213276A1 (de) 1992-04-16 1993-10-21 Mannesmann Ag Verfahren zum Herstellen nahtloser Rohre nach dem Stopfenwalzverfahren

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2322674A1 (fr) * 1974-01-10 1977-04-01 Vallourec Dispositif de changement mecanique de mandrins pour laminoirs

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2080943A1 (fr) * 1970-01-30 1971-11-26 Mannesmann Ag
FR2194492A1 (fr) * 1972-08-02 1974-03-01 Algoma Steel Corp Ltd
DE2701824A1 (de) 1976-01-19 1977-07-21 Vallourec Lorraine Escaut Walzwerk zur herstellung von nahtlosen rohren
DE2759919C2 (fr) 1976-05-04 1987-07-23 White Consolidated Industries, Inc., Cleveland, Ohio, Us
JPS57152308A (en) * 1981-03-16 1982-09-20 Kawasaki Steel Corp Controlling method of screw-down of plug type rolling mill
EP0076170A1 (fr) * 1981-09-30 1983-04-06 The Head Wrightson Machine Company Limited Lubrification de mandrins
JPS58167006A (ja) * 1982-03-26 1983-10-03 Nippon Kokan Kk <Nkk> 継目無鋼管熱間圧延機のマンドレルバ−交換方法
EP0335079A2 (fr) 1988-03-30 1989-10-04 Lonza Ag Procédé et dispositif de fabrication de tuyaux à partir de loupes
DE4213276A1 (de) 1992-04-16 1993-10-21 Mannesmann Ag Verfahren zum Herstellen nahtloser Rohre nach dem Stopfenwalzverfahren

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
L. A. SHUL'GA ET AL: "Cooling and lubricating unit for pilger mill mandrel bars", METALLURGIST, vol. 21, no. 5/6, SU, pages 396 - 397 *
PATENT ABSTRACTS OF JAPAN vol. 6, no. 256 (M - 179) 15 December 1982 (1982-12-15) *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 2 (M - 266) 7 January 1984 (1984-01-07) *

Also Published As

Publication number Publication date
US5584203A (en) 1996-12-17
JPH08168802A (ja) 1996-07-02
CZ212295A3 (en) 1997-06-11
CN1137426A (zh) 1996-12-11

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