EP0041907B1 - Dornrückhaltebank in kontinuierlich arbeitenden Walzwerken - Google Patents
Dornrückhaltebank in kontinuierlich arbeitenden Walzwerken Download PDFInfo
- 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
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 10
- 230000000452 restraining effect Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- KWGRBVOPPLSCSI-WPRPVWTQSA-N (-)-ephedrine Chemical compound CN[C@@H](C)[C@H](O)C1=CC=CC=C1 KWGRBVOPPLSCSI-WPRPVWTQSA-N 0.000 description 6
- 239000000543 intermediate Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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)
- Metal Extraction Processes (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Metal Rolling (AREA)
- Luminescent Compositions (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Handcart (AREA)
Claims (9)
gekennzeichnet
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 |
---|---|---|---|
FR8012609 | 1980-06-06 | ||
FR8012609A FR2483808A1 (fr) | 1980-06-06 | 1980-06-06 | Banc de retenue de mandrin pour le mandrin qui porte un tube dans un laminoir |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0041907A1 EP0041907A1 (de) | 1981-12-16 |
EP0041907B1 true EP0041907B1 (de) | 1984-01-11 |
Family
ID=9242789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81420083A Expired EP0041907B1 (de) | 1980-06-06 | 1981-06-03 | Dornrückhaltebank in kontinuierlich arbeitenden Walzwerken |
Country Status (9)
Country | Link |
---|---|
US (1) | US4361023A (de) |
EP (1) | EP0041907B1 (de) |
JP (1) | JPS6036328B2 (de) |
AT (1) | ATE5799T1 (de) |
CA (1) | CA1150985A (de) |
DE (1) | DE3161880D1 (de) |
ES (1) | ES502773A0 (de) |
FR (1) | FR2483808A1 (de) |
MX (1) | MX159650A (de) |
Families Citing this family (10)
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 |
MX2024006183A (es) * | 2021-11-26 | 2024-06-11 | Sms Group Gmbh | Sistema para retener una varilla de mandril en una fresa de laminacion de tuberia, y metodo de funcionamiento de dicho sistema. |
Family Cites Families (5)
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 (de) * | 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 (de) * | 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 |
-
1980
- 1980-06-06 FR FR8012609A patent/FR2483808A1/fr active Granted
-
1981
- 1981-06-02 US US06/269,451 patent/US4361023A/en not_active Expired - Fee Related
- 1981-06-03 JP JP56084537A patent/JPS6036328B2/ja not_active Expired
- 1981-06-03 EP EP81420083A patent/EP0041907B1/de not_active Expired
- 1981-06-03 DE DE8181420083T patent/DE3161880D1/de not_active Expired
- 1981-06-03 AT AT81420083T patent/ATE5799T1/de not_active IP Right Cessation
- 1981-06-04 ES ES502773A patent/ES502773A0/es active Granted
- 1981-06-04 MX MX187668A patent/MX159650A/es unknown
- 1981-06-08 CA CA000379203A patent/CA1150985A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6036328B2 (ja) | 1985-08-20 |
ES8203658A1 (es) | 1982-04-01 |
ATE5799T1 (de) | 1984-01-15 |
FR2483808A1 (fr) | 1981-12-11 |
JPS5711707A (en) | 1982-01-21 |
DE3161880D1 (en) | 1984-02-16 |
US4361023A (en) | 1982-11-30 |
FR2483808B1 (de) | 1983-06-24 |
EP0041907A1 (de) | 1981-12-16 |
MX159650A (es) | 1989-07-24 |
CA1150985A (en) | 1983-08-02 |
ES502773A0 (es) | 1982-04-01 |
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