EP0017675B1 - Mandrin de bobinage expansible - Google Patents

Mandrin de bobinage expansible Download PDF

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Publication number
EP0017675B1
EP0017675B1 EP79200179A EP79200179A EP0017675B1 EP 0017675 B1 EP0017675 B1 EP 0017675B1 EP 79200179 A EP79200179 A EP 79200179A EP 79200179 A EP79200179 A EP 79200179A EP 0017675 B1 EP0017675 B1 EP 0017675B1
Authority
EP
European Patent Office
Prior art keywords
segments
core
pistons
chambers
coiler mandrel
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
EP79200179A
Other languages
German (de)
English (en)
Other versions
EP0017675A1 (fr
Inventor
Hendrik Majoor
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.)
Estel Hoogovens BV
Tata Steel Ijmuiden BV
Original Assignee
Estel Hoogovens BV
Hoogovens Groep BV
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 Estel Hoogovens BV, Hoogovens Groep BV filed Critical Estel Hoogovens BV
Priority to EP79200179A priority Critical patent/EP0017675B1/fr
Priority to DE7979200179T priority patent/DE2962609D1/de
Publication of EP0017675A1 publication Critical patent/EP0017675A1/fr
Application granted granted Critical
Publication of EP0017675B1 publication Critical patent/EP0017675B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/243—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages actuated by use of a fluid
    • B65H75/2437—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages actuated by use of a fluid comprising a fluid-pressure-actuated elastic member, e.g. a diaphragm or a pneumatic tube

Definitions

  • This invention relates to an expandable coiler mandrel, having a core, a plurality of radially expandable segments mounted around the core and, for each segment, a plurality of hydraulic piston-and-cylinder units by which the segments are movable radially, these being connected to the hydraulic units within the core.
  • Expandable coiler mandrels are frequently used in rolling mills for metal strip and sheet, recoiler equipment and the like. A strip is coiled tightly onto the expanded segments of the mandrel and can be removed later from the mandrel by moving the segments inwardly.
  • a construction for a mandrel as described above is shown in USA Patent 2 321 146; other examples are French Patent specifications 1074 746 and 2 310 950.
  • a variation shown in French Patent specification 1 367 531 has wedges which push the segments outwardly, the wedges themselves being moved by a piston-and-cylinder unit.
  • the piston units act to move the segments outwardly against the force of inwardly acting return springs, which cause retraction of the segments when the hydraulic pressure is released.
  • the segment are not fixed to the pistons. This means that the fluid has to overcome the force of the springs in order to expand the pistons. Additionally, this mixture of hydraulic and mechanical operation is a complication and is liable to lead to vibrations or oscillations.
  • the present invention therefore has as its object the provision of a coiler mandrel which overcomes the problems of the prior art and in particular a mandrel in which mechanical actuation is avoided, in which the hydraulic drive does not have to overcome the force of counter-acting springs, which is simple in construction and in which uniform movement of the segments without tilting is promoted.
  • the invention as claimed is intended to achieve this object.
  • the segments are secured to the pistons, which are annular in shape and are guided by pins fixed in the core. These pins also limit the outward movement of the segments.
  • the segments are both expanded and contracted hydraulically, so that return springs are avoided.
  • the segments are moved outwardly by fluid supplied by the pressure cylinders whose pistons move in common with the pistons of each single segment connected to more than one pressure cylinder (i.e., in no case are all the pistons of a segment connected to the same pressure cylinder.) This means that the segments are prevented from moving outwards unequally or tilting during expansion. Because the pressure pistons move in common in the pressure cylinders, which however in turn are connected independently of each other to the first chambers of the annular pistons, these annular pistons are moved outwards independently of each other, but at the same time.
  • French Patent specification 1 369471 shows four pressure cylinders used to provide an independent supply of pressurised fluid to inflatable elements located between the core and the expandable segments.
  • the problems of supply to inflatable elements are different from those of supply to rigid cylinders and pistons.
  • the core has an axial bore which contains fluid distributor blocks at the locations of the hydraulic units, the blocks making a fluid tight fit with the bore and having circumferential grooves forming passages with the bore wall and communicating on the one hand with passages in the core leading to said first and second chambers and on the other hand with passages within the block leading to fluid supply tubes extending axially along the bore, e.g., from the pressure cylinders.
  • first chambers are coupled to the pressure cylinders, and the second chamber may also be coupled by such tubes to a supply of pressure fluid, by which the pressure is applied, the annular pistons and consequently the segments are retracted to the core.
  • the number of segments, of piston-and- cylinders unit per segment, of pressure cylinders and the method of coupling the pressure cylinders to the different first chambers can be varied to suit the particular case.
  • a construction which is very reliable during operation as well as simple in construction may be obtained if the mandrel has four segments with four hydraulic units per segment, while there are eight pressure cylinders, connected to the distribution blocks by eight tubes within the bore.
  • a construction which is easy to assemble and disassemble is possible if the segments have axially extending grooves which receive hooked or flanges lugs on the annular pistons. With this arrangement it is possible to attach the segments to the annular pistons by axial movement.
  • Fig. 1 a shows the end of a core 1 of the coiler mandrel, i.e. what is seen here is the location at which a strip is, in use, coiled onto the mandrel.
  • core 1 Around core 1 are arranged four radially movable segments 2 which are closed to the core by a cover 3 at the end of the mandrel.
  • the segments 2 can move radially along pins 4 up to a limit provided by enlarged heads 5 of the pins 4.
  • the segments 2 are coupled to annular pistons 6, by which they can be moved outwards and inwards as will be explained below.
  • a central axially extending throughbore of the core are four distribution blocks 7, which each have five circumferential grooves 8 in their cylindrical surfaces.
  • the grooves 8 form passages with the wall of the bore, and are connected by passages within the distribution blocks, (see fig. 2) to axially extending tubes 9 which connect the distribution blocks with each other and to a feed system for the pressure fluid.
  • the feed system is drawn schematically in figure 1 b and is located in the back part of the coiler mandrel.
  • Figs. 1 a and 1 b are part of one and the same coiler mandrel. Between the parts shown are the usual bearing and driving systems for the mandrel. Since these do not in principle differ from those of conventional constructions of coiler mandrels, and are not relevant to the invention, they are not shown or described here.
  • the back part of the coiler mandrel shown in Fig. 1 b comprises three blocks 12, 13 and 14, in which a movable annular body 15 having a guide sleeve 16, is located between a plurality of pressure cylinders 18 and a collecting chamber 21.
  • a movable annular body 15 having a guide sleeve 16 is located between a plurality of pressure cylinders 18 and a collecting chamber 21.
  • Mounted on the ring 15 are eight pressure pistons 17, which are respectively movable in the eight pressure cylinders 18.
  • Each of the pressure cylinders 18 is connected, independently of the other cylinders 18, via a passage 19 with one of the tubes 9.
  • Each tube 9 is itself connected to two of the first chambers associated with the pistons 6.
  • Eight passages 20 bypass the pressure cylinders 18 and are connected via a connection 30' to a supply unit for the pressure fluid.
  • Four of these passages 20 are respectively in direct connection with a further four of the tubes 9, these four tubes 9 being connected to the second chambers associated with the pistons 6.
  • the remaining four passages 20 each contain a non-return valve (not illustrated in the figure), and are connected to the passage 19, in order that the fluid system comprising the pressure cylinders and the first chambers is kept filled.
  • the chamber 21 is also connected to the supply unit for pressure fluid, via a passage 29. If fluid is supplied under pressure via the, passage 29, while there is no pressure on the fluid in channel 30, the ring is moved axially (upwards as drawn in Fig. 1 b).
  • the combination of the ring 15 and the pressure pistons 17 acts as a pressure multiplier, so that fluid' is conveyed under extremely high pressure (e.g., 200kg/cm 2 ) behind the pistons 6 via the passages 19; 9; 8 and 10. As a result the segments 2 are moved into the expanded condition of the mandrel.
  • the second chambers described below are energized via four of the passages 20 and the pistons 6 are driven back, retracting the segments 2. At the same time the cylinders 18 are filled via the other four of the passages 20.
  • Fig. 2 shows in more detail how the annular piston 6 has end faces respectively in the two chambers 25 and 26 (the so-called first and second chambers respectively).
  • the piston 6 moves along a guide body 24, which itself is mounted on the shank of the pin 4.
  • the pin 4 is firmly secured in the core 1.
  • the chamber 25 . (the first chamber) is connected via a passage 10 (out of the plane of this view - see Fig. 1 A) to one of the grooves 8 in the distribution block 7 while the chamber 26 (the second chamber) is connected via a passage 11, extending centrally through pin 4 to the central one of the grooves 8.
  • the passage 10 is joined within the distribution block 7 to one of eight bores 22, arranged in a circle as seen in Fig. 2, while the passage 11 is connected in a similar manner to one of a second, inner circle of bores 23.
  • the bores 22 are connected respectively to the eight tubes 9 which are connected to the passages (19) (Fig. 1b).
  • the four bores 23 are respectively connected to the four tubes 9 which are connected to the above-mentioned four passages 20 connected directly to the supply line 30.
  • they need not be shown here in detail it is of importance to ensure that the connections of the chambers 25 to the grooves 8 and the connections of the grooves 8 to the tubes 9 are such that for none of the segments 2 are all the chambers 25 connected to one and the same pressure cylinder 18.
  • the aim of this is to prevent a segment 2 starting to tilt during expansion of the mandrel. In fact, with four segments 2 and eight cylinders 18, each segment may be arranged to be actuated by two of the cylinders 18.

Landscapes

  • Winding, Rewinding, Material Storage Devices (AREA)
  • Winding Of Webs (AREA)

Claims (6)

1. Mandrin de bobinoir expansible, comportant un noyau (1), une pluralité de segments radialement expansibles (2) montés autour du noyau (1) et, pour chaque segment (2), une pluralité de dispositifs hydrauliques à piston- cylindre au moyen desquels les segments (2) peuvent être déplacés radialement, ces segments étant reliés (8, 11) aus dispositifs hydrauliques à l'intérieur du noyau (1), caractérisé par le fait que les segment sont fixés aux pistons (6) des dispositifs hydrauliques précités, ces pistons étant annulaires et étant montés autour d'axes (4) qui sont eux-mêmes fixés au noyau (1) et comportent des têtes (5) limitant le déplacement radialement vers l'extérieur des segments (2), des première et seconde chambres (25, 26) pour le fluide hydraulique étant prévues respectivement aux côtés radialement intérieur et extérieur du piston (6), grâce à quoi les dispositifs hydrauliques peuvent fonctionner de manière à entraîner un mouvement de retrait ainsi qu'un mouvement d'expansion des segments, lesdites premières chambres (25) des dispositifs hydrauliques (pour communiquer aux segments leur mouvement d'expansion) étant raccordées à une pluralité de cylindres de compression dont les pistons sont agencés de manière à être déplacés en commun, et les raccordements étant tels que lesdites premières chambres (25) associées à un seul segment (2) sont raccordées respectivement à au moins deux cylindres de compression différents.
2. Mandrin de bobinoir suivant la revendication 1, caractérisé par le fait que lesdits cylindres de compression sont disposés en cercle dans une partie dudit noyau (1) en étant axialement espacés des segments (2) et que leurs pistons sont reliés à une bague en vue d'un déplacement commun dans la direction axiale du noyau.
3. Mandrin de bobinoir suivant les revendications 1 ou 2, caractérisé par le fait que le noyau (1) comporte un alésage axial qui contient des blocs (7) de distributeurs de fluide aux endroits des dispositifs hydrauliques, les blocs (7) s'ajustant de façon étanche vis-à-vis des fluides dans l'alésage et comportant des rainures circonférencielles (8) formant des passages avec la paroi de l'alésage et communiquant, d'une part, avec des passages (11) du noyau menant jusqu'auxdites première et seconde chambres (25, 26) et, d'autre part, avec des passages (22, 23) à l'intérieur du bloc (7) menant à des tubes (9) d'alimentation en fluide s'étendant axialement le long de l'alésage, par exemple, à partir des cylindres de compression.
4. Mandrin de bobinoir suivant la revendication 3, caractérisé par le fait que quatre desdits segments (2) sont présents, chacun comportant quatre des dispositifs hydrauliques précités, huit cylindres de compression étant présents, chacun de ces cylindres étant raccordé à deux des dispositifs hydrauliques précités.
5. Mandrin de bobinoir suivant la revendication 4, caractérisé par le fait que les huit cylindres de compression précités sont raccordés aux blocs (7) de distributeurs par huit desdits tubes (9) qui (vus en coupe radialement du noyau) sont disposés dans l'alésage suivant un cercle autour de l'axe du rotor, quatre autres desdits tubes (9) d'étendant axialement étant présents pour fournir le fluide comprimé auxdites secondes chambres (26) (pour un mouvement de rappel des segments), ces quatre tubes (9) étant disposés dans le noyau sur un second cercle (vu en coupe radiale).
6. Mandrin de bobinoir suivant l'une quelconque des revendications 1 à 5, caractérisé par le fait que les segments (2) comportent des rainures (27) qui logent des saillies (28) en forme de rebords se trouvant sur les pistons (6), afin de fixer les segments aux pistons.
EP79200179A 1979-04-11 1979-04-11 Mandrin de bobinage expansible Expired EP0017675B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP79200179A EP0017675B1 (fr) 1979-04-11 1979-04-11 Mandrin de bobinage expansible
DE7979200179T DE2962609D1 (en) 1979-04-11 1979-04-11 Expandable coiler mandrel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP79200179A EP0017675B1 (fr) 1979-04-11 1979-04-11 Mandrin de bobinage expansible

Publications (2)

Publication Number Publication Date
EP0017675A1 EP0017675A1 (fr) 1980-10-29
EP0017675B1 true EP0017675B1 (fr) 1982-04-28

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EP79200179A Expired EP0017675B1 (fr) 1979-04-11 1979-04-11 Mandrin de bobinage expansible

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EP (1) EP0017675B1 (fr)
DE (1) DE2962609D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008030145A1 (de) 2008-06-27 2009-12-31 Sms Siemag Aktiengesellschaft Verfahren und Vorrichtung zum Aufwickeln von Metallband

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352933A (en) * 1981-02-06 1982-10-05 Smithkline Beckman Corporation Chemical methods and intermediates for preparing substituted pyrimidinones
US4893761A (en) * 1988-03-30 1990-01-16 Gay & Wagner Research Corporation Air pressure activated collet
CN109110578A (zh) * 2018-09-12 2019-01-01 瑞安市创博机械有限公司 膨胀均匀的气胀轴
DE102022114973A1 (de) * 2022-06-14 2023-12-14 Uniflex - Hydraulik GmbH Verfahren zur mehrachsigen Umformung eines hohlen Werkstücks
CN117565100B (zh) * 2024-01-16 2024-04-30 新江科技(江苏)有限公司 一种用于镁合金舱体铸型的机器人夹具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630278A (en) * 1949-05-04 1953-03-03 Poe Machine And Engineering Co Contractile drum
AT219940B (de) * 1960-05-18 1962-02-26 Othmar Ing Ruthner Einrichtung zur Steuerung von Aufwickeltrommeln
FR1369471A (fr) * 1963-07-02 1964-08-14 Wean Damiron Mandrin expansible par chambre dilatable
DE1253001B (de) * 1964-11-03 1967-10-26 Sundwiger Eisen Maschinen Spreizbare Wickeltrommel fuer bandfoermiges Walzgut
US4050643A (en) * 1975-05-15 1977-09-27 Great Lakes Industries, Inc. Expandable core-shafts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008030145A1 (de) 2008-06-27 2009-12-31 Sms Siemag Aktiengesellschaft Verfahren und Vorrichtung zum Aufwickeln von Metallband
RU2467817C2 (ru) * 2008-06-27 2012-11-27 Смс Зимаг Аг Способ и устройство для намотки металлической полосы
US8523099B2 (en) 2008-06-27 2013-09-03 Sms Siemag Aktiengesellschaft Method and device for winding metal strip material

Also Published As

Publication number Publication date
DE2962609D1 (en) 1982-06-09
EP0017675A1 (fr) 1980-10-29

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