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
  • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
  • B21B13/145—Lateral support devices for rolls acting mainly in a direction parallel to the movement of the product
• • 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

Definitions

• the invention relates to a rolling stand with a pair of work rolls for rolling a metal strip, with support rolls, of which the work rolls assigned to them are trimmed laterally and which can be acted upon by a force generating device with a support force directed in the direction of the work roll, and with support or intermediate rolls which are supported by a chock which can be pushed into and removed from the roll stand in the direction of its longitudinal axis and of which one each supports the work roll assigned to it in a direction essentially perpendicular to the direction of movement of the metal strip.
• each work roll is assigned two support rolls, which lie opposite one another laterally on the respective work roll.
• the support roller and the intermediate roller are mounted in an installation piece in the known roll stand.
• beam-like supports for the support rollers are articulated to the chock.
• the lateral dimensions of the carrier are limited in such a way that the carriers with the support rollers do not protrude laterally from the chock.
• the chock forms the support roller, the intermediate roller and the support rollers, as well as the associated support and bearing elements, a structural unit which as such can easily be pulled out of the stand for maintenance and repair work and then pushed back in again.
• the required support forces are applied in the known device by means of manually adjustable screw bolts, which each act laterally on the carrier without being coupled to it.
• a rolling stand is known from the Austrian patent specification AT 359 459, in which three support rollers are provided to support the work roll.
• the support rollers themselves are each laterally trimmed by hydrostatic bearings, three of which are arranged at regular intervals along the respective work roll. Hydraulic cylinders are also provided to apply the necessary support forces.
• the problem with the rolling stand known from AT 359 459 is, on the one hand, that the support rollers can be removed and, on the other hand, that the supporting forces are adjusted to the respective load during rolling.
• the object of the invention is to develop a roll stand of the type explained above in such a way that changing the rolls of the stand can be carried out more quickly and easily than in the prior art.
• the support rollers can be delivered into an operating position from a rest position, in which they are arranged outside the area in which the chock of the support or intermediate roller moves when being inserted or removed in which they rest on the work roll.
• the support rollers can be moved out of the range of motion of the chock carrying the support roller and possibly further rollers. In this way, the chock with the stored therein Rolls are removed from the roll stand, serviced and pushed back in independently of the support rolls. It is also possible to service or replace the support rollers independently of the rollers of the chock.
• Another important advantage of the invention is that it is no longer necessary to adapt the spatial arrangement of the rollers carried by the chock to the need for the articulated mounting of the support rollers.
• the installation space gained in this way opens up the possibility of choosing a larger range of diameters for the design of the support, intermediate and work rolls.
• larger roller diameters can be provided compared to the prior art, so that a larger grinding area is available and the rollers in question have a longer service life.
• the intermediate rolls can be bent in accordance with the load on the work roll assigned to them, so that the dimensional accuracy of the roll gap is further improved.
• the invention achieves that it has resolved the structural unit which has always been implemented in the prior art, formed from the rollers and the chock, that the individual rollers of a rolling stand according to the invention can be made quickly and easily accessible, so that their maintenance or Repairs can be carried out in a shorter time and in a simplified manner.
• the invention can be implemented inexpensively with simple means in that the force generating device removes the support roller from the rest position. moved to the operating position.
• the force generating device not only takes on the application of the supporting force, but also serves as an adjusting device with which the support rollers can be fed onto the work rollers or can be moved back by them.
• the required support forces can be generated with a small space and energy requirement in that the force generating device is a hydraulically or pneumatically actuated cylinder.
• the forces required to support the support roller can be metered precisely and with short reaction times. This makes it possible to influence the roll gap between the work rolls by providing the support rolls with precisely divided support forces.
• Force generating device acts on this beam. Because the force-generating devices act on the beams, the support forces can be applied to the support rollers while avoiding stress jumps. This applies in particular if storage is provided by which the support roller is supported on the support beam at least over certain sections of its longitudinal extent. If force generating devices acting on the support rollers, such as actuating cylinders or comparable units which transmit the support force via a plunger, are used, then when used in accordance with the invention, one is Support beam on the one hand a smaller number of power generating devices than in the prior art sufficient to achieve the desired smooth transition of the load exerted by the individual devices. On the other hand, the use of the support bar enables the work and / or support roll to be deflected in a targeted manner.
• a first possibility of forming a bearing is that the bearing is formed by roller bearings which are arranged at regular intervals along the support roller.
• the bearing can also be formed by at least one hydrostatic bearing. Regardless of how the bearing is designed, it can be subdivided into individual segments arranged along the respective support roller, which segments are then expediently assigned to the respective force application devices.
• the support beam is divided in the longitudinal direction of the support roller into two detachably connected parts, the first part carrying the support roller and the second being coupled to the force generating device, the support roller carried by the respective support beam can be replaced particularly easily and quickly. This applies in particular when the first part carrying the support roller is held on the second part of the support beam so as to be displaceable in its longitudinal direction.
• Figure 1 shows a section of a rolling mill in a first operating position in section along the direction of the rolled metal strip.
• Fig. La shows a detail A of Figure 1 in an enlarged view.
• FIG. 3 shows the rolling stand according to FIG. 1 in a section parallel to the conveying plane of the rolled strip
• FIG. 4 shows a detail of a second rolling stand in a first operating position in a section along the conveying direction of the rolled metal strip
• FIG. 5 shows the roll stand according to FIG. 4 in a second operating position.
• the rolling stands W1, W2 each have two work rolls 1, 2.
• the work rolls 1, 2 are supported in the vertical direction via an intermediate roll 3, 4 on a support roll, not shown, whose axis of rotation lies in the same plane as the axes of rotation of the work rolls 1, 2 and the intermediate rolls 3, 4.
• the intermediate rolls 3, 4 are mounted in a chock 7 and the support rolls, not shown, in a separate chock, also not shown, while the work rolls 1, 2 are held loosely in the roll stand W1, W2.
• the chock 7 is slidably mounted on a guide track, not shown, and can be pulled in its longitudinal direction axially parallel to the axes of rotation of the work, intermediate and support rolls from the respective roll stand W1, W2.
• Each work roll 1, 2 are two support rolls 8, 9; 10, 11 assigned, one side of which is assigned to the work roll 1, 2.
• the support rollers 8, 9; 10, 11 are each carried by a support beam 12, 13, 14, 15.
• the support beams 12, 13, 14, 15 are each divided into two parts 12a, 12b, the division plane being arranged vertically and extending parallel to the plane in which the axes of rotation of the work rolls 1, 2, the intermediate rolls 3, 4 and support rollers not shown.
• the second part 12b of the respective support beam 12, 13, 14, 15 carries the support roller 8, 9, 10 and 11 respectively assigned to this support beam 12, 13, 14, 15 via a guide rail 12c and formed on the respective first part 12a Holding pin 16, the respective second part 12b is held on the first part 12a so that it can be moved in its longitudinal direction, so that it can be pulled out of the respective rolling stand W1, W2 with the support roller 8, 9, 10 or 11 carried by it.
• hydrostatic bearings 18 are arranged at regular intervals for lateral support of the support rollers 8, 9, 10 and 11 along the support rollers 8, 9, 10 and 11.
• the bearings 18 are on the respective Support beams 12, 13, 14, 15 are supported and are supplied with pressure fluid via a supply line 19 in the second part 12 b of the respective support beam 12, 13, 14, 15.
• roller bearings 118 are arranged at regular intervals on the support beams 12, 13, 14, 15 for the lateral support of the support rollers 8, 9, 10 and 11 along the support rollers 8, 9, 10 and 11.
• the roller bearings 118 are also supported on the respective support beam 12, 13, 14, 15.
• Each support beam 12, 13, 14, 15 is assigned a plurality of hydraulically operating actuating cylinders 20, 21, 22, 23 placed at regular intervals along the respective support beam 12, 13, 14 and 15, respectively, which are arranged in the columns arranged to the side of the chock 7 24 and 25 of the roll stand W1, W2 are attached.
• the pistons 20a, 21a, 22a, 23a of the actuating cylinders 20, 21, 22, 23 are coupled to the first part 12a of the respective support beam 12, 13, 14 and 15, respectively.
• the movement axis X of the pistons 20a, 21a, 22a, 23a are arranged inclined in the direction of the roll gap W.
• the respective second part 12b along the guide rail 12c is separated from the respective first part 12a of the support beams 12, 13, 14, which is connected to the respectively assigned piston 20a, 21a, 22a and 23a. 15 pulled.
• this can be done with the chock 7 pulled out.
• the support rollers 8, 9, 10, 11 with the support beams 12, 13, 14, 15 are moved into the respective free space R, so that the chock 7 can be pulled unhindered from the roller rack W1 or W2.
• the support rollers 8, 9, 10, 11 can also be pulled together with the chock 7 from the rolling stand W1 or W2.
• the support beams 12, 13, 14, 15 are moved into a position in which their respective guide rails 12 c are aligned with the respective outer edge of the mounting piece 7.
• the chock 7 e ne assembly and disassembly aid, which makes it possible to dispense with a special auxiliary device of this type.
• the supporting force is generated by the actuating cylinders 20, 21, 22, 23 by which the support rollers 8,9,10,11 are supported on the hydrostatic bearings 18 or the roller bearings 118 on their side facing away from the respective work roll 1, 2.
• the support forces emitted by the individual positioning cylinders 20, 21, 22, 23 arranged along the respective support beam 12, 13, 14, 15 can be set so that a specific geometry of the roll gap W is caused by a corresponding deflection of the respective support rollers 8, 9 , 10.11 or work roll 1.2 is reached.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)
• Rolls And Other Rotary Bodies (AREA)
• Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
• Coating With Molten Metal (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Metal Rolling (AREA)
• Buildings Adapted To Withstand Abnormal External Influences (AREA)
• Iron Core Of Rotating Electric Machines (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

Country Status (8)

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Family Cites Families (20)

• 1999
  • 1999-09-17 DE DE19944612A patent/DE19944612C1/de not_active Expired - Lifetime
• 2000
  • 2000-08-01 AU AU61613/00A patent/AU6161300A/en not_active Abandoned
  • 2000-08-01 AT AT00948020T patent/ATE253417T1/de not_active IP Right Cessation
  • 2000-08-01 JP JP2001524748A patent/JP2003509217A/ja active Pending
  • 2000-08-01 DE DE50004357T patent/DE50004357D1/de not_active Expired - Lifetime
  • 2000-08-01 US US10/088,277 patent/US7104101B1/en not_active Expired - Lifetime
  • 2000-08-01 WO PCT/EP2000/007431 patent/WO2001021334A1/fr active IP Right Grant
  • 2000-08-01 ES ES00948020T patent/ES2209923T3/es not_active Expired - Lifetime
  • 2000-08-01 EP EP00948020A patent/EP1212153B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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