EP0041907B1 - Banc de retenue de mandrin pour laminoir continu - Google Patents

Banc de retenue de mandrin pour laminoir continu Download PDF

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Publication number
EP0041907B1
EP0041907B1 EP81420083A EP81420083A EP0041907B1 EP 0041907 B1 EP0041907 B1 EP 0041907B1 EP 81420083 A EP81420083 A EP 81420083A EP 81420083 A EP81420083 A EP 81420083A EP 0041907 B1 EP0041907 B1 EP 0041907B1
Authority
EP
European Patent Office
Prior art keywords
carriage
chains
retaining
mandrel
fork
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
Application number
EP81420083A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0041907A1 (fr
Inventor
Claude Blanquet
André Fichel
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.)
Vallourec SA
Original Assignee
Vallourec SA
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 Vallourec SA filed Critical Vallourec SA
Priority to AT81420083T priority Critical patent/ATE5799T1/de
Publication of EP0041907A1 publication Critical patent/EP0041907A1/fr
Application granted granted Critical
Publication of EP0041907B1 publication Critical patent/EP0041907B1/fr
Expired 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
    • B21B25/02—Guides, supports, or abutments for mandrels, e.g. carriages or steadiers; Adjusting devices for mandrels

Definitions

  • the invention relates to a retaining bench for retaining, then releasing, a mandrel driven in a rolling mill by a tube with which the mandrel is associated.
  • This rolling mill is, for example, a continuous rolling mill and the tube manufacturing technique implies, for example, that the mandrel which carries the tube at its end is first held at controlled speed during the rolling of the tube, and then is released from way to cross the rolling mill following the tube.
  • the winding of the chains around the tensioning wheels causes the progressive retraction of the fork by varying the angle that the fork forms with the contact surface of the mandrel.
  • the present invention aims to retain the advantages of the carriage vis-à-vis the previous solution while avoiding the use of cams.
  • this is achieved by establishing, in addition to the articulation of the chain carriage, according to the prior art, an additional connection between the chains and the carriage and by positioning the mandrel retaining fork in the part downstream of the carriage.
  • the two articulation links of the carriage with the chain are made on different links.
  • the two links-articulations of the carriage are arranged so as to allow a clearance at one of the two articulations carriage-chains. Without travel, winding the chains on the drive and tension wheels would no longer be possible.
  • the sand axial displacement link with respect to the links supports all of the mandrel retaining force. This link must be doubled to distribute the effort on the two chains.
  • the additional connection between carriage and chains can be made on one side only of the carriage on only one of the two chains, and not necessarily on both.
  • a preferred embodiment of the invention consists in arranging the clearance at the level of the downstream link-articulation which constitutes the additional link.
  • the tensile force exerted by the mandrel on the carriage force which is transmitted to the chain via the main link without movement, is done in this way, as long as possible, on the straight part of the path of the chain, whereas, if the opposite arrangement was adopted, part of the tensile force would be made on a larger non-rectilinear part.
  • the links in the chain on which the link-joints are made are blocks. These blocks are, in general, interconnected by intermediate or flat segments.
  • a simple embodiment of the additional link is constituted for a chain or for both, by an auxiliary axis integral with the carriage and engaged with the possibility of sliding in a light, preferably longitudinal, of a link of at least one of the two chains.
  • This additional connection can also be produced by an auxiliary axis secured to a link of one of the chains and in engagement, with the possibility of sliding in a slot, preferably longitudinal, of the carriage.
  • the fork is preferably arranged in the vicinity of the downstream joint connection.
  • FIG 1 is a very schematic overview of a retaining bench of the prior art.
  • the bench includes two parallel chains (1 -1 '), each forming a closed circuit between a drive wheel (2-2') and a back and tension idler wheel (3-3 ').
  • the drive wheels (2-2 ') are driven by a motor (4).
  • Each chain consists of a succession of links or blocks (5-5 ') joined together step by step by intermediate or flat segments (6-6').
  • the bench further comprises a carriage (7) fixed to the chains by lateral axes (8- 8 ') articulated pivotally on two opposite links (9-9').
  • This carriage carries a fork (10) which is intended to retain the mandrel (11) by contact of the retaining surface (12) of the fork with a shoulder (13) of the mandrel; rollers (16-16 '), integral with the carriage, keep it in the pass area during the working race, thanks to raceways (17-17'), themselves parallel to the ace password.
  • rollers (16-16 ') are integral with the carriage, keep it in the pass area during the working race, thanks to raceways (17-17'), themselves parallel to the ace password.
  • a cam (14) to which corresponds a cam roller (14') mounted on an arm integral with the carriage, so that at the end of its travel, the roller (14 '), under the action of the cam (14), causes rapid release of the fork, the profile of the paths (17-17') being, in this area, drawn so as to allow this movement.
  • the retaining bench of the invention comprises a carriage (7) which is connected to the chains (1 -1 '), not only by the lateral axes (8-8'), but also by auxiliary lateral axes (15-15 ').
  • the axes (8-8 ') are pivotally hinged on two opposite links (9-9') of the chains (1 -1 '), while the auxiliary axes (15-15') correspond to the links (18-18 ') which immediately precede the links (9 -9') and are only separated by an intermediate segment. These axes can move in longitudinal slots (19-19 ') of the links (18-18') where they are held captive.
  • the fork (10) is constituted, for example, by an adequate cutting of the carriage on itself or by an insert.
  • the invention is not limited to a particular range.
  • l angle formed by the fork with the axis of the mandrel during the start of the tilting of the carriage varies less quickly than in the case of a fork which would be rigidly linked to the chain, so that the angle made by the plane of the retaining surface of the fork with the plane of the bearing surface of the shoulder (i3) of the mandrel always remains such that tg ce is less than f, f being the relative coefficient of friction of these two surfaces; it follows that the retaining force of the mandrel (11) has no upwardly directed component, as would be the case if tg ⁇ becomes greater than f, and that the mandrel does not tend to escape towards the top during the release phase, which is always accompanied by bending forces in the shoulder (13) and tearing of the metal in its bearing face.
  • FIGS 3 and 4 illustrate in detail the operation of a bench of the prior art.
  • the fork (10) of this bench is directly linked to two links (9-9 ') opposite one and the other chain.
  • This bench does not have, like that of FIG. 1, a cam (14) or a roller (14 ') or a raceway (17-17'), which allow the fork to follow an appropriate trajectory at the time of release. of the mandrel (11).
  • Figures 5 and 6 illustrate in parallel the operation of a bench according to the invention.
  • the area of the mandrel (11) remains parallel and in the plane of the axis (10) of the chains (1 -l') in the horizontal part of their trajectory.
  • the value of the limit angle ⁇ 1 at the time of setting in can be reduced by increasing the distance between the two articulation axes (8) and (15), this by mounting articulation axes (8) and (15) on links separated by more than one intermediate segment.
  • the device according to the invention allows the fork (10) to slip away when the mandrel is released, without requiring the rollers (16-16 '), the raceways (17-17') , the cam (14) and the roller (14 ') of the device in FIG. 1.
  • the axis which constitutes the additional connection is fixed relative to the link which drives it and with clearance in a lumen of the carriage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)
  • Control Of Metal Rolling (AREA)
  • Replacement Of Web Rolls (AREA)
  • Luminescent Compositions (AREA)
  • Metal Rolling (AREA)
  • Handcart (AREA)
  • Metal Extraction Processes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP81420083A 1980-06-06 1981-06-03 Banc de retenue de mandrin pour laminoir continu Expired EP0041907B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81420083T ATE5799T1 (de) 1980-06-06 1981-06-03 Dornrueckhaltebank in kontinuierlich arbeitenden walzwerken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8012609A FR2483808A1 (fr) 1980-06-06 1980-06-06 Banc de retenue de mandrin pour le mandrin qui porte un tube dans un laminoir
FR8012609 1980-06-06

Publications (2)

Publication Number Publication Date
EP0041907A1 EP0041907A1 (fr) 1981-12-16
EP0041907B1 true EP0041907B1 (fr) 1984-01-11

Family

ID=9242789

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81420083A Expired EP0041907B1 (fr) 1980-06-06 1981-06-03 Banc de retenue de mandrin pour laminoir continu

Country Status (9)

Country Link
US (1) US4361023A (ja)
EP (1) EP0041907B1 (ja)
JP (1) JPS6036328B2 (ja)
AT (1) ATE5799T1 (ja)
CA (1) CA1150985A (ja)
DE (1) DE3161880D1 (ja)
ES (1) ES8203658A1 (ja)
FR (1) FR2483808A1 (ja)
MX (1) MX159650A (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113119A1 (de) * 1981-03-27 1982-10-14 Mannesmann AG, 4000 Düsseldorf Dornstangen haltevorrichtung
DE3717165C1 (en) * 1987-03-26 1988-03-31 Mannesmann Ag Method for the production of tubes by the cold reciprocating rolling method
CN1293953C (zh) * 2004-03-25 2007-01-10 烟台鲁宝钢管有限责任公司 预穿芯棒的定位方法和装置
CN101596552A (zh) * 2009-07-08 2009-12-09 江苏常宝普莱森钢管有限公司 插棒机的芯棒链条支承导入装置
ITMI20110573A1 (it) * 2011-04-07 2012-10-08 Danieli Off Mecc Dispositivo di convogliamento di mandrino per impianto di laminazione di tubi
CN102240678A (zh) * 2011-06-27 2011-11-16 无锡西姆莱斯石油专用管制造有限公司 一种芯棒快速定位装置
CN103586292B (zh) * 2013-11-27 2016-01-13 太原重工股份有限公司 冷轧管机送进机构
CN105231707A (zh) * 2015-09-25 2016-01-13 东莞致诚办公家具有限公司 带歇息脚架座椅
IT201700023064A1 (it) * 2017-03-01 2018-09-01 Danieli Off Mecc Laminatoio per la laminazione di elementi astiformi cavi o comunque concavi
WO2023094089A1 (de) * 2021-11-26 2023-06-01 Sms Group Gmbh System zum rueckhalten einer dornstange in einem rohrwalzwerk und verfahren zum betreiben des systems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190910112A (en) * 1909-04-28 1909-11-04 Albert James Farr Rolling Mill for Producing Tubes.
DE225679C (ja) * 1909-04-28
US3237440A (en) * 1962-05-12 1966-03-01 Schloemann Ag Fa Method and apparatus for arresting a mandrel and tube discharged from a rolling mill
FR2198797B1 (ja) * 1972-09-08 1975-01-03 Vallourec
IT1110926B (it) * 1979-02-07 1986-01-13 Innocenti Santeustacchio Spa Metodo ed apparecchiatura per il controllo del movimento del mandrino in un laminatoio continuo a mandrino trattenuto

Also Published As

Publication number Publication date
MX159650A (es) 1989-07-24
DE3161880D1 (en) 1984-02-16
JPS5711707A (en) 1982-01-21
ES502773A0 (es) 1982-04-01
JPS6036328B2 (ja) 1985-08-20
FR2483808A1 (fr) 1981-12-11
ATE5799T1 (de) 1984-01-15
EP0041907A1 (fr) 1981-12-16
CA1150985A (en) 1983-08-02
FR2483808B1 (ja) 1983-06-24
ES8203658A1 (es) 1982-04-01
US4361023A (en) 1982-11-30

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