EP0386861B1 - Planetenwalze und Vorrichtung zum Schleifen der Arbeitswalzen - Google Patents

Planetenwalze und Vorrichtung zum Schleifen der Arbeitswalzen Download PDF

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Publication number
EP0386861B1
EP0386861B1 EP90250057A EP90250057A EP0386861B1 EP 0386861 B1 EP0386861 B1 EP 0386861B1 EP 90250057 A EP90250057 A EP 90250057A EP 90250057 A EP90250057 A EP 90250057A EP 0386861 B1 EP0386861 B1 EP 0386861B1
Authority
EP
European Patent Office
Prior art keywords
grinding
rolls
work
roll
planetary
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 - Lifetime
Application number
EP90250057A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0386861A1 (de
Inventor
Dieter Dipl.-Ing. Figge
Peter Dipl.-Ing. Fink
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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0386861A1 publication Critical patent/EP0386861A1/de
Application granted granted Critical
Publication of EP0386861B1 publication Critical patent/EP0386861B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/18—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills
    • B21B13/20—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for step-by-step or planetary rolling; pendulum mills for planetary rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/16—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged
    • B24B5/167—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged for rolls with large curvature radius, e.g. mill rolls

Definitions

  • Planetary roller with means for grinding the work rolls in the installed state and device for grinding the work rolls
  • the invention relates to the design of a planetary roller for grinding the work rolls and a device for performing the grinding.
  • Planetary mills have been known for many years. One embodiment is described in US 33 33 452. They can be used advantageously for small and medium-sized production runs. Despite a whole series of advantages also in the steel strip production, their distribution in the production plants of the steel industry is still not very large. One of the reasons - perhaps the main reason - for this is that the times for changing and regrinding the work rolls are quite long. A fact that is particularly serious in view of the downtimes - in the production of the strip, the work rolls are worn out after approx. 6 hours to the point that they have to be reground. The advantages of the planetary rolling mill in terms of low operating costs and low capital service are offset by higher maintenance costs compared to conventional rolling mills.
  • a planetary mill has two planetary rollers, one planetary roller in the sense used here includes two chocks, the support body, two cages and, for example, 24 work rolls and 24 intermediate rolls.
  • the work rolls are worn to the point that they have to be reground, the two planetary rolls currently in use are replaced by new ones, ie those with reground or possibly new work rolls.
  • Such a planetary roller exchange is possible in about 10 minutes, so that the rolling process is not so badly affected.
  • the planetary rollers each weighing around 100 tons, are transported from the scaffolding to an assembly station, where the work rollers (2 x 24 pieces) are removed by hand.
  • the intermediate rolls have a much longer service life, they only need to be reworked about every 20th time; they normally remain in the planetary roller. After the grinding of the individual rolls in a grinding device, the work rolls are manually reinstalled in the planetary rolls.
  • DE-OS 16 02 136 relates to a supported rolling mill with easily exchangeable work rolls, in which means are provided to move the work rolls radially, to set the work roll in rotation and to be ground by a grinding device brought in from the outside.
  • the invention had for its object to significantly reduce the time and cost required for the regrinding of the work rolls of a planetary mill.
  • This object is achieved in that for grinding the work rolls of a planetary rolling mill, a complete planet roll with cages and chocks is removed from the roll stand and clamped in a grinding device with a grinding wheel, and the work rolls are ground one after the other in the installed state in such a way that the cages of the work rolls are fixed in the grinding position for a defined work roll, the respective work roll is moved so far radially outwards by the means according to the invention that it can rotate freely relative to the associated intermediate roll and the work roll by corresponding multiple feed and Longitudinal movements of the grinding wheel is processed, and that the entire planetary roller is reinstalled in the roll stand after the grinding process.
  • the high amount of work that has hitherto resulted for the removal, the transport to the grinding machine and the reinstallation of the working rollers is avoided.
  • a complete planetary roller is transported to a special grinding device, clamped in it and the work rolls are reworked one after the other in the installed state.
  • the cages are each rotated by a roller division, so that a work roller is located exactly at the height of the grinding wheel center or somewhat below it, with the positioning somewhat below reliably preventing "pulling in” even in unfavorable cases.
  • the cages are locked and the work roll to be ground is moved radially outwards by a special device, so that they no longer is in contact with the associated intermediate roller.
  • the grinding wheel which is located on one side of the grinding device, possibly somewhat to the side of the work roll, is fed in, ie moved as far in the direction of the work roll as is necessary for the first grinding operation and then moved along the work roll. After a new infeed at the opposite end of the work roll, the next grinding operation takes place in the opposite direction. This is repeated until the specified removal or roller diameter has been reached. Then the grinding wheel is moved back and the next work roll is brought into the grinding position and ground until all work rolls have been reworked.
  • the cages are provided with external teeth, the division of which corresponds to the work roll division or is in relation to a fraction with an integer denominator. It is driven by a relatively small drive motor regardless of the grinding wheel drive.
  • the radial displacement for lifting the work roll from the associated intermediate roll takes place according to the invention by means of a cylinder bore located under each spring assembly in the cages and a piston movable therein. The space under the piston belonging to the work roll to be ground is pressurized through a feed bore.
  • the work roll chocks are positioned against adjustable fixed stops on the grinding machine and are non-positively clamped by the cylinders in this position.
  • the feed holes are provided on the outer mouths of the cage with quick-release couplings, so that only the two feeds (right and left) of the work roll to be processed are connected and the connection change for the next work roll is very quick.
  • the chocks are provided with grooves, into which corresponding clamping elements or sliding blocks engage, which are tightened via tie rods and hydraulic cylinders and thus pull the chocks firmly against the clamping blocks of the grinding device.
  • a device with the features of claims 3 and 4 is used for problem-free and time-saving and cost-saving grinding of the work rolls of a planetary rolling mill.
  • the planetary roller is placed with its chocks on a foundation plate or a foundation frame, possibly with spacer plates placed between them.
  • a clamping block is firmly connected on one side and a cross slide on the other side. If necessary, the clamp can be moved and fixed by means of suitable fastening elements in order to enable adaptation to planetary rollers with different diameters.
  • the grinding wheel with its drive is arranged on the cross slide. The feed movement of the grinding wheel and its movement along the work roll takes place with the help of this cross slide.
  • a cantilever arm which has a drive device with a friction roller, is arranged on the foundation plate or the foundation frame or directly next to it, but firmly connected thereto. Furthermore, the grinding device between the clamping block and the cross slide has one rotating device, which is provided with two pinions, and two Locking devices that engage in the external teeth of the cages.
  • a particularly advantageous embodiment of the grinding device according to the invention is that the drive device with a friction roller for driving the work roll is designed as a rocker with an integrated gear.
  • This rocker is rotatably mounted on the upper end of the cantilever arm facing the planetary roller.
  • This storage is for the exact positioning of the friction roller, i.e. Equipped with an eccentric bush for adjusting the individual grinding work steps.
  • a hydraulic cylinder engages, with the help of which the friction roller is pivoted in the direction of the planetary roller according to the radial movement of the work roll to be machined, so that it comes to rest on the work roll to be ground and drives it.
  • the friction roller is driven by a drive motor attached to the swing arm via a gear integrated in the swing arm. This friction drive is stationary, while the grinding slide carries out an oscillating movement with the grinding wheel.
  • FIGS. 1 to 5 The device required for grinding work rolls of a planetary rolling mill and the necessary structural designs of the planetary roll are shown by way of example in FIGS. 1 to 5 and described in more detail below. For the sake of clarity, constructive details that are known to the person skilled in the art have been omitted.
  • FIG. 1 the overall view of the device is shown.
  • a clamping block 2 for tensioning the planetary roller 3 is fastened on a foundation plate or a foundation frame 1.
  • each of the two chocks 4 is pulled firmly against the clamping block 2 with the aid of two clamping cylinders 5, the force of the clamping cylinders 5 being transmitted via tie rods 6 and slot nuts 8 engaging in grooves 7.
  • a guide bed 9, on which a cross slide 10 can be moved, is also arranged on the foundation plate or the foundation frame 1. With the help of the upper part of this cross slide 10, the grinding wheel 11 can be set, ie brought into the grinding position and readjusted for the individual grinding operations in accordance with the material removal will.
  • the grinding wheel 11 is moved along the work roll 12 to be machined with the aid of the lower part of the cross slide 10.
  • the work roll 12 to be machined in each case is lifted for grinding by radial displacement outwards from the associated intermediate roll 13, which in turn rests on the support body 14, so that it can rotate or be driven freely.
  • the work roll 12 is driven during the grinding process by a friction roller 15 which is mounted in the rocker 16.
  • the friction roller 15 is moved according to the radial movement of the work roll 12 to be processed, i.e. after lifting off the associated intermediate roller 13 and before the start of the grinding process, pivoted in by the hydraulic cylinder 17 by means of the rocker 16 such that it comes to rest on the work roller 12.
  • the friction roller 15 is driven by the drive motor 18 via a gear, not shown here, integrated in the rocker 16.
  • the rocker 16 is mounted in a cantilever 20 by means of an eccentric bushing 19. Cantilever arm 20 and rocker 16 are designed such that the cross slide 10 and the grinding wheel 11 can be moved along the work roll 12 without hindrance.
  • the hydraulic cylinder 17 is also supported on the cantilever arm 20.
  • FIG. 2 shows the structural design of a suitable planetary roller 3.
  • the support body 14 With that which is fixed both in the roll stand and in the grinding device, ie in both cases it does not move Installation piece 4, the support body 14 is firmly connected by means of screws 22, ie the support body 14 is also stationary during the grinding process.
  • Cage 23 is rotatably supported with respect to the support body 14 and revolves around it, which has an internal toothing 24 for driving in the installed state in the roll stand, ie in the operating state, and an external toothing 25 for rotating the cage 23 in the grinding device during grinding.
  • the work roll 12 is rotatably mounted directly in the cage 23 via a movable chock 26 and the intermediate roll 13.
  • the work roller 12 In the operating state as well as in the dismantled state of the planetary roller, the work roller 12 is pressed by the spring assembly 27 against the centrifugal force effect when rotating around the support body 14 against the support rings 28 of the intermediate roller 23.
  • the work roll 12 In the grinding position shown here, on the other hand, the work roll 12 is moved radially outwards by a piston 29, which compresses the spring assembly 27, ie upwards in the plane of the drawing, so that it is lifted off the intermediate roll 13 and rotates freely or during grinding can be driven.
  • the underside of the piston 29 To lift the work roll 12 to be machined, the underside of the piston 29 is pressurized via a feed bore 30.
  • a corresponding pressure source for example a hydraulic pump, is connected to the outer circumference of the cage 23 via the quick-release coupling 31 when the respective work roller 12 has been brought into the grinding position by rotating the cage 23 by one roller pitch.
  • a corresponding pressure source for example a hydraulic pump
  • Fig. 3 shows schematically the sub-device with the help of which the work rolls 12 are brought into processing position one after the other.
  • the planetary roller stands with its chocks 4 on the foundation plate or the foundation frame 1.
  • the drive unit 23 consisting of the electric motor and gearbox and the bearings 33 and the pinions 34 are arranged, which engage in the external teeth 25 of the cages 23. Since the pitch of the external toothing 25 and that of the pinions 34 engaging therein are dimensioned such that they correspond to the work roll pitch or their ratio corresponds to a fraction with an integer denominator, it is with a locking device, as is shown schematically in Fig. 4, possible to position the work roll to be machined exactly opposite the grinding wheel.
  • a pawl 35 with a prismatic profile is pressed into the external toothing 25 of the cage 23 by a hydraulic cylinder 36, which is supported on the foundation plate or the foundation frame 1.
  • FIG. 5 shows a partial section of the cage 23, in which the device for the radial displacement of the work rolls 12, not shown in this figure, can be seen.
  • the representation corresponds to the normal operating state in which the spring assembly 27 the pin 38 (of the movable chock 26, not shown here, in which the work roll 12 is mounted) and thus the work roll 12 via the intermediate ring 39 and the ring nut 40 in the direction of the center of the planetary roll , ie pulls down in the display level.
  • the piston constructed in this example from piston crown 41 and piston skirt 42 with piston rings 43 is used for radial displacement of the work rolls.
  • the underside of the piston crown 41 is pressurized via the feed bore 30.
  • the piston moves upward in the plane of the illustration, and the ring-shaped extension 43 rests on the end face of the pin 38 and presses it upward in the plane of the illustration against the force of the pressure spring assembly 27 (as a result of which the work roll is brought into the grinding position).
  • the cylinder bore 37 is provided with a cylinder sleeve 45 for machining reasons.
  • the spring 46 presses the piston against the bottom of the cylinder bore 37 during operation in order to avoid constant movement of the piston, ie wear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP90250057A 1989-03-10 1990-02-22 Planetenwalze und Vorrichtung zum Schleifen der Arbeitswalzen Expired - Lifetime EP0386861B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907730A DE3907730A1 (de) 1989-03-10 1989-03-10 Verfahren und vorrichtung zum schleifen der arbeitswalzen eines planetenwalzwerkes
DE3907730 1989-03-10

Publications (2)

Publication Number Publication Date
EP0386861A1 EP0386861A1 (de) 1990-09-12
EP0386861B1 true EP0386861B1 (de) 1993-11-18

Family

ID=6375972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250057A Expired - Lifetime EP0386861B1 (de) 1989-03-10 1990-02-22 Planetenwalze und Vorrichtung zum Schleifen der Arbeitswalzen

Country Status (3)

Country Link
US (1) US5113623A (enrdf_load_stackoverflow)
EP (1) EP0386861B1 (enrdf_load_stackoverflow)
DE (2) DE3907730A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4041989A1 (de) * 1990-12-21 1992-07-02 Mannesmann Ag Vorrichtung zum schleifen der arbeitswalzen eines planetenwalzwerkes
RU2159161C1 (ru) * 1999-05-17 2000-11-20 Открытое акционерное общество "Новолипецкий металлургический комбинат" Способ подготовки рабочих валков для холодной прокатки стальных полос
US6334583B1 (en) 2000-02-25 2002-01-01 Hui Li Planetary high-energy ball mill and a milling method
CN110405554B (zh) * 2019-08-19 2020-10-13 浙江依蕾毛纺织有限公司 一种细纱机皮辊高效打磨装置
US11623321B2 (en) * 2020-10-14 2023-04-11 Applied Materials, Inc. Polishing head retaining ring tilting moment control

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436561A (en) * 1945-03-22 1948-02-24 Norton Co Grinding machine
US3073074A (en) * 1959-08-12 1963-01-15 Landis Tool Co Work handling mechanism for rotary grinder
US3333452A (en) * 1965-03-03 1967-08-01 Sendzimir Inc T Reduction of thick flat articles
GB1098470A (en) * 1967-02-10 1968-01-10 Michael George Sendzimir Improvements in or relating to rolling mills
BE756332A (fr) * 1969-09-18 1971-03-18 Pneumatiques Caoutchouc Mfg Supports elastiques d'empoises
US4242840A (en) * 1979-08-03 1981-01-06 Smiths Industries Workpiece drive wheel for a grinding machine
DE3621979A1 (de) * 1986-07-01 1988-01-07 Voith Gmbh J M Verfahren zum aussenrundschleifen von walzen
ATE85911T1 (de) * 1987-07-24 1993-03-15 Daido Steel Co Ltd Ausbesserung von walzwerkwalzen und geraet dafuer.

Also Published As

Publication number Publication date
DE3907730A1 (de) 1990-09-13
DE3907730C2 (enrdf_load_stackoverflow) 1992-01-09
US5113623A (en) 1992-05-19
EP0386861A1 (de) 1990-09-12
DE59003496D1 (de) 1993-12-23

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