CN217798072U - Universal rolling mill, universal rolling mill unit and flat steel rolling system - Google Patents

Abstract

The utility model relates to a steel rolling production technical field, concretely relates to universal mill, universal mill unit and flat steel rolling system, this universal mill include along two horizontal rolls of vertical direction subtend setting and along two edgers of horizontal direction subtend setting, and two horizontal rolls and two edgers roll are in the same place and are formed roll hole and roll gap, and horizontal roll and edger roll all adopt the drive roller. This application is through all setting horizontal roll and edger roll to the drive roller, and horizontal roll and edger roll are rotatory simultaneously and are bitten the rolled piece, can solve the not good technical problem of the form of drive roller and driven roller combination bite into smoothly, size precision and product appearance control that exist at rolling in-process among the prior art.

Description

Universal rolling mill, universal rolling mill unit and flat steel rolling system

Technical Field

The application relates to the technical field of steel rolling production, in particular to a universal rolling mill, a universal rolling mill set and a flat steel rolling system.

Background

Flat steel generally refers to steel having a width of 10mm to 310mm, a thickness of 3mm to 100mm, a rectangular cross section, and a certain chamfer (see fig. 1 to 2). The flat steel is widely used as raw materials for manufacturing steel members, fixing, supporting and damping plates and rings in the field of automobile machinery and the like, and is essential in the fields of manufacturing industry and infrastructure.

The hole type system adopted by the traditional flat steel production process mainly comprises the following parts: closed pass systems (as shown in fig. 3), diagonal rolling pass systems (as shown in fig. 4), notched square pass systems (as shown in fig. 5), and flat-vertical pass systems (as shown in fig. 6). However, the closed pass system obtains products with different thicknesses by adjusting the roll gap of the roll, but the closed pass system can only be applied to the variable part of the spread amount within the allowable deviation range of the finished product in the width direction, the sharing property of the pass is poor, when the variety (mainly referring to different widths) is changed, the roll/the hole groove needs to be changed, the specification of the flat steel is very many, the production is stopped frequently when the specification is changed, and the production efficiency is severely limited. Meanwhile, the method has serious abrasion to the side surface of the roller hole groove and short service life. This method has been gradually eliminated at present. In the process of rolling the hole pattern system rolled by the diagonal line, a certain rotation angle is provided, the stress of the roller is uneven during deformation, and axial force is generated, so that the roller axially moves in a string manner, and the requirement on mechanical stability is high. When the rolled piece comes out of the roller, the rolled piece generates rotation torsion, and the requirement on an auxiliary guide device (a device for guiding the rolled piece out of the pass of the roller) is higher and more complex. And during continuous rolling production, each pass generates torsional rolling. Meanwhile, the method has the same defects as a closed hole type, and is rarely adopted at present. The hole type sharing performance of the square hole type system with the concave edge is poor, and the requirement on hole type adjustment is high. The flat-vertical hole type system is a production process method which is widely applied in the current flat steel production line, and compared with the three methods, the hole type system is simpler, but has the following defects: the use range of the hole type specification is still small, when the specification span is large, the hole groove or the roller still needs to be replaced, the machine needs to be stopped, and the production efficiency is influenced; the abrasion and the service life of the hole and the groove need to be improved and promoted; the deformation of each pass is still limited to the upper direction, the lower direction or the left direction and the right direction, the synchronous deformation of the upper direction, the lower direction, the left direction and the right direction cannot be realized, and the deformation efficiency of each pass is influenced; because the deformation is only in two directions, the requirements on the height-width ratio of the flat steel and the design requirements of the hole groove are higher, and the wider and thinner the variety is, the more limited the depth of the notch groove on the roller is, and the strength, the service life and the production stability of the roller are all influenced to a certain extent. In the last pass, due to the two-roller pass rolling, the width direction of the roll is free expansion deformation, the size and the quality of the edge part cannot be stably controlled, field production personnel perform experience judgment production under the conventional operation, and the size precision control is unstable. And the requirement on the size of the edge part is higher in the national standard, and the stable production is more difficult.

In summary, the four production methods all produce the flat steel by means of forced widening and deformation of the two-roll hole pattern. However, when the flat steel is produced by adopting the method, the production efficiency is low, and the uniformity of the internal structure performance of the obtained flat steel is not good.

The method also adopts a universal rolling mill to roll flat-bulb steel products, for example, CN207668164U discloses a universal rolling device for flat-bulb steel, the universal rolling device comprises a universal rolling mill unit, the universal rolling mill unit consists of 2-6 universal rolling mills, and any universal rolling mill has an upper horizontal roll, a lower horizontal roll, an operation side vertical roll and a transmission side vertical roll; chamfering is carried out at two ends of the lower horizontal roller (2), so that a combined flat-bulb steel rolling hole is formed after the upper horizontal roller, the lower horizontal roller, the operation side vertical roller and the transmission side vertical roller are combined together, the shape of the combined flat-bulb steel rolling hole is the shape formed by combining two flat-bulb steels, webs of the two flat-bulb steels are connected together to form a combined web, and the ball heads are respectively positioned at the same side of the connected webs as a left leg and a right leg. The device can be used for rolling the flat-bulb steel, so that the rolling batch can be obviously improved, and the consumption of the roller is reduced. However, the device is suitable for rolling special type flat-bulb steel, and is not suitable for rolling conventional flat steel, and the universal rolling mill in the device comprises two driving rollers and two driven rollers (the driven rollers mean that no driving force is provided and follow the driven rollers), and the driving rollers bite into the rolled piece while the driven rollers usually have hysteresis reverse acting force on the rolled piece in the rolling process of the two driving rollers and the two driven rollers, and from the perspective of rolling deformation theory, the production mode has a common effect on synchronous deformation of the rolled piece, and the size precision of the obtained finished product is required to be further improved.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, the present application provides a universal rolling mill, a universal rolling mill train and a flat steel rolling system to further improve the dimensional accuracy of the resulting flat steel product.

In a first aspect, the application provides a universal rolling mill, including two horizontal rolls along vertical direction subtend setting and two vertical rolls along horizontal direction subtend setting, two horizontal rolls and two vertical rolls form roll hole and roll gap together, horizontal roll and vertical roll all adopt the drive roller.

The principle of the universal rolling mill of the application is as follows: the horizontal roller and the vertical roller are set as the driving rollers, and the horizontal roller and the vertical roller simultaneously rotate to bite into a rolled piece, so that the technical problems of unsmooth biting, poor dimensional accuracy and poor product appearance control existing in the rolling process of the driving roller and driven roller combination mode in the prior art can be solved.

In another aspect, the present application provides a universal rolling mill train comprising at least 2 universal rolling mills as described above arranged along an upstream and a downstream path.

In an exemplary embodiment of the present application, the roll holes and/or roll gaps of the adjacent universal rolling mills on the upstream and downstream sides are staggered.

In this application, through the crisscross setting of the roll hole with the adjacent universal mill of upper and lower stream, can prevent the "ear" defect that appears in the roll gap among the continuous rolling process.

In another aspect, the application also provides a flat steel rolling system, which comprises a heating device, a universal roughing mill unit, a universal middle mill unit, a universal finishing mill unit and a cooling device which are arranged in sequence; the universal roughing mill train and/or the universal intermediate mill train and/or the universal finishing mill train comprise at least 2 universal mills as described above arranged along the upstream and downstream.

In an exemplary embodiment of the present application, the flat steel rolling system further includes a descaling device located between the heating device and the universal finishing mill train.

In this application, through set up the descaling device between heating device and universal finishing mill unit, can detach the iron scale on rolled piece surface, promote finished product surface quality.

In an exemplary embodiment of the application, the flat steel rolling system further comprises a first and/or a second cutting device, the first cutting device being located between the universal roughing train and the universal intermediate train, the second cutting device being located between the universal intermediate train and the universal finishing train.

In the application, the first cutting device is arranged between the universal roughing mill unit and the universal middle mill unit, and/or the second cutting device is arranged between the universal middle mill unit and the universal finishing mill unit, so that the corners of the rolled piece can be trimmed to cut off the irregular section of the rolled piece.

In an exemplary embodiment of the application, the flat steel rolling system further comprises a first temperature regulating device located between the universal middle mill train and the universal finishing mill train and/or a second temperature regulating device located downstream of the universal finishing mill train.

In the application, a first temperature adjusting device is arranged between the universal middle rolling mill unit and the universal finishing mill unit, and/or a second temperature adjusting device is arranged at the downstream of the universal finishing mill unit, so that the temperature of a rolled piece after rolling can be reduced, and the downstream rolling process can be carried out smoothly.

In an exemplary embodiment of the present application, the first and/or second thermostat employs an in-line water cooler or an in-line water mist cooler or an air cooler.

In the application, the first temperature adjusting device and/or the second temperature adjusting device are/is set to adopt the on-line water cooler or the on-line water mist cooler or the air cooler, so that the temperature of rolled pieces can be adjusted in real time, better internal microscopic grain structure and better mechanical performance of the product are obtained, and the production efficiency and the product competitiveness are improved.

In an exemplary embodiment of the application, the flat steel rolling system further comprises a pre-rolling mill, which is located between the heating device and the universal middle mill train.

In this application, through set up the prerolling machine between rolling mill unit in heating device and omnipotent, can be to the different grade type treat that rolling rolled piece rolls in advance to make flat steel rolling system can be adapted to the production demand that contains different types of rolled piece in the supplied materials.

In an exemplary embodiment of the present application, the flat steel rolling system further includes a power mechanism connecting the horizontal roll and the vertical roll of the universal rolling mill.

In this application, through the power unit that sets up the horizontal roll and the edger roll with universal mill is connected, can adjust the position of horizontal roll and edger roll, and then adjust the shape and the size of the roll hole that horizontal roll and edger roll formed to satisfy the rolling demand of the band steel of different dimensions.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic cross-sectional view of a flat steel;

FIG. 2 is a schematic view of the macrostructure of a flat steel;

FIG. 3 is a schematic view of a closed hole system;

FIG. 4 is a schematic diagram of a diagonal rolling pass system;

FIG. 5 is a square hole pattern system with recessed edges;

FIG. 6 is a schematic structural view of a horizontal-vertical hole type system;

FIG. 7 is a schematic diagram of the pass configuration of a universal rolling mill shown in an exemplary embodiment of the present application;

FIG. 8 is a schematic block diagram of a universal mill train shown in an exemplary embodiment of the present application;

FIG. 9 is a schematic block diagram of a universal mill train according to another exemplary embodiment of the present application;

FIG. 10 is a schematic structural view of a flat steel rolling system shown in an exemplary embodiment of the present application;

fig. 11 is a schematic structural view of a flat steel rolling system according to another exemplary embodiment of the present application.

Reference numerals

1-rolling a piece;

21-horizontal roll, 22-vertical roll, 23-hole rolling and 24-roll gap;

3-a heating device;

4-a descaling device;

5-universal roughing mill train;

6-first cutting device;

7-universal middle rolling mill set;

8-a first temperature regulating device;

9-a second resection device;

10-universal finishing train;

11-a second temperature regulating device;

12-a third resection device;

13-a cooling device;

14-a pre-rolling mill;

15-power mechanism.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present disclosure.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. are used to define the components, and are only used for the convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, should not be construed as limiting the scope of the present invention.

In the following description, numerous details are set forth to provide a more thorough explanation of embodiments of the present invention, however, it will be apparent to one skilled in the art that embodiments of the present invention may be practiced without these specific details.

Referring to fig. 7, fig. 7 is a schematic diagram of a pass structure of a universal rolling mill according to an exemplary embodiment of the present application. The universal rolling mill is used for improving the dimensional accuracy of the flat steel finished product.

As shown in fig. 7, in an exemplary embodiment of the present application, the universal rolling mill includes two horizontal rolls 21 disposed to face each other in a vertical direction and two vertical rolls 22 disposed to face each other in a horizontal direction, and the two horizontal rolls 21 and the two vertical rolls 22 are combined together to form a roll hole 23 and a roll gap 24. The horizontal roller 21 and the vertical roller both adopt driving rollers, and the driving rollers are in the prior art and are not described in detail herein.

The principle of the universal rolling mill of the embodiment is as follows: the horizontal roller 21 and the vertical roller 22 are set as driving rollers, and the horizontal roller 21 and the vertical roller 22 rotate to bite into a rolled piece simultaneously, so that the technical problems of unsmooth biting, poor dimensional accuracy and poor product appearance control in the rolling process in the form of the combination of the driving rollers and the driven rollers in the prior art can be solved.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a universal rolling mill train according to an exemplary embodiment of the present application.

In an exemplary embodiment of the present application, as shown in FIG. 8, the universal rolling mill train includes at least 2 universal rolling mills as described above arranged in upstream and downstream relationship. Specifically, in this embodiment, the horizontal rolls 21 and the vertical rolls 22 have arc-shaped cross sections on the surfaces adjacent to the rolling holes 23, and the rolling holes and/or roll gaps 24 of the upstream and downstream universal rolling mills are staggered. The rolling mill train can be used as a roughing mill train and a medium mill train. In the roughing mill train, the curvature of the cross section of the surface of the horizontal roll 21 and the vertical roll 22 adjacent to the rolling hole 23 is larger than that of the surface of the horizontal roll 21 and the vertical roll 22 adjacent to the rolling hole 23 in the intermediate mill train. In the actual production process, the number of the universal rolling mills in the universal rolling mill set can be adjusted according to the rolling pass requirements of a production process system and regulations.

It should be understood that, in the present application, upstream and downstream means upstream and downstream with respect to the direction of travel of the rolled product.

Specifically, the roll holes 23 and/or the roll gaps 24 of the adjacent universal rolling mills on the upstream and the downstream are arranged in a staggered mode, namely the roll holes 23 and/or the roll gaps 24 of the adjacent universal rolling mills on the upstream and the downstream are not located at the same position, so that the defect of 'ears' in the roll gaps in the continuous rolling process can be prevented, and the product percent of pass of the flat steel is improved.

Referring to fig. 9, fig. 9 is a schematic structural view of a universal rolling mill train according to another exemplary embodiment of the present application.

In another exemplary embodiment of the present application, as shown in fig. 9, the universal mill train comprises at least 2 universal mills as described above arranged along the upstream and downstream, specifically, in this embodiment, the surfaces of the horizontal rolls 21 and the vertical rolls 22 on the side adjacent to the rolling hole 23 are flat, and the rolling holes 23 and/or the roll gaps 24 of the upstream and downstream universal mills are staggered. The mill train can be used as a finishing mill train.

Referring to fig. 10, fig. 10 is a schematic structural view of a flat steel rolling system according to an exemplary embodiment of the present application.

As shown in fig. 10, in an exemplary embodiment of the present application, the flat steel rolling system includes a heating device 3, a descaling device 4, a universal roughing mill train 5, a universal middle mill train 7, a universal finishing mill train 10, and a cooling device 13, which are arranged in this order.

The heating device 3 is used to heat the rolled stock 1 to be rolled, in order to facilitate the subsequent rolling process. The heating device 3 can adopt a gas heating furnace, an oil medium heating furnace electric induction heating device and the like. Gas heating furnaces, oil medium heating furnaces, electric induction heaters, etc. are prior art and are not described herein.

The descaling device 4 removes scales (i.e., scales) on the surface of the rolled member 1 to be rolled by spraying high-pressure water (pressure is generally 20-30 MPa) to the surface of the rolled member 1 to be rolled. The high-pressure water forms impact force on the surface of a rolled piece 1 to be rolled at high jet flow speed, and after the impact force reaches a certain degree, the impact force is higher than the critical crushing pressure value of the scales on the surface of the rolled piece 1, so that the scales can fall off from the surface of the rolled piece 1. The rolled piece is descaled through the descaling device 4, the iron oxide scale can be effectively removed, and the surface quality of finished products is improved. The descaling device is prior art and will not be described in detail herein.

The universal roughing train 5 comprises at least 2 universal roughing mills arranged along the upstream and downstream, the structure of the universal roughing train 5 being shown in fig. 8. The universal roughing mill train 5 is used for primarily rolling the rolled piece 1 subjected to the heating treatment and the descaling treatment, so that the rolled piece 1 is deformed.

The curvature of the cross-sections of the surfaces of the horizontal and vertical rolls 21 and 22 of the rolling mill on the side adjacent to the pass 23 decreases in the direction of travel of the rolled product 1. Specifically, in the running direction of the rolled piece 1, the section radians of the surfaces of the horizontal roller 21 and the vertical roller 22 of the rolling mill adjacent to the rolling hole 23 are in a decreasing trend, the radians can adopt larger circular arcs in the rough and medium rolling pass, the radians are decreased when the surfaces are closer to the final finished product pass, the final finished product pass is consistent with the standard section of the product, the rolled piece is controlled to deform uniformly through pass gradual change, the deformation section and the quality of the rolled piece are stably and effectively controlled, and the product size precision is improved.

With continued reference to fig. 10, a first cutting device 6 is provided between the universal roughing train 5 and the intermediate rolling train 7. The first cutting device 6 is used for cutting the rolled piece 1 primarily rolled by the universal roughing mill train 5 to cut off irregular sections of the rolled piece 1. The first cutting device 6 can be a flying shear, a sawing machine, etc. Flying shears and saw cutters are prior art and will not be described further herein.

The universal intermediate mill train 7 includes at least 2 universal intermediate mills disposed along the upstream and downstream sides, and the structure of the universal intermediate mill train 7 is shown in fig. 8. The universal intermediate rolling mill train 7 is used for further rolling the primarily rolled piece 1, so that the rolled piece 1 is further shaped, and the rolled piece 1 can meet the rolling requirements of a subsequent finish rolling process.

In the direction of travel of the rolling stock, the apertures 23 and/or the roll gaps 24 of the first universal intermediate rolling mill of the universal intermediate rolling mill train 7 and the universal roughing mill upstream adjacent thereto are staggered.

With continued reference to fig. 10, a first thermostat 8 and a second cut-off 9 are provided between the universal intermediate mill train 7 and the universal finishing mill train 10.

In the rolling process, the microstructure of the rolled piece 1 changes, the change of the microstructure leads to the temperature rise of the rolled piece 1, and the first temperature regulating device 8 is used for reducing the temperature of the rolled piece 1 rolled by the universal intermediate rolling mill unit 7, so that the rolled piece 1 can meet the rolling requirement of the subsequent finish rolling process. The first temperature adjusting device 8 adopts an online water cooler, an online water mist cooler, an air cooler and the like. The first temperature adjusting device 8 is set to adopt an online water cooler or an online water mist cooler or an air cooler, so that the temperature of the rolled piece 1 can be adjusted in real time, better internal microscopic grain structure and use mechanical property of the product are obtained, and the production efficiency and the product competitiveness are improved. The online water cooler, the online water mist cooler and the air cooler are prior art and are not described herein.

The second cutting device 9 is used for cutting the rolled piece 1 rolled by the universal intermediate rolling mill train 7 to cut off irregular sections of the rolled piece 1. The second shearing device 9 can adopt a flying shear, a sawing machine and the like. Flying shears and saw cutters are prior art and will not be described further herein.

The universal finishing block set 10 includes at least 2 universal intermediate rolling mills positioned along the upstream and downstream sides, and the structure of the universal finishing block set 10 is shown in fig. 9. The universal finishing train 10 is used for further rolling the rolled piece 1 rolled by the universal middle rolling train 7, so that the rolled piece 1 is formed into a flat steel finished product.

In the direction of travel of the product, the apertures 23 and/or gaps 24 of the first universal finishing block of the universal finishing block 10 and the universal intermediate block upstream adjacent to the first universal finishing block are staggered.

With continued reference to fig. 10, downstream of the universal finishing train 10 in the rolling direction of the rolled stock 1, a second thermostat 11 and a third cut-off 12 are provided.

The second temperature adjusting device 10 is used for reducing the temperature of the rolled piece 1 rolled by the universal finishing mill unit 10, so as to control the cooling process by controlling rolling, and adjust the internal structure of the flat steel product on line, thereby realizing optimized mechanical performance of the product. The second thermostat 10 employs an on-line water cooler, an on-line water mist cooler, an air cooler, or the like. By setting the second temperature adjusting device 10 to adopt an online water cooler or an online water mist cooler or an air cooler, the temperature of the rolled piece 1 can be adjusted in real time, better internal microscopic grain structure and use mechanical property of the product are obtained, and the production efficiency and the product competitiveness are improved. The on-line water cooler, the on-line water mist cooler and the air cooler are prior art and are not described herein again.

The third cutting device 12 is used for cutting the rolled material 1 rolled by the universal finishing mill train 10 to cut off irregular sections of the rolled material 1. The third shearing and cutting device 12 may be a flying shear, a saw cutter, or the like. Flying shears and saw cutters are prior art and will not be described further herein.

The cooling device 13 is used for cooling the rolled piece 1 after being rolled by the universal finishing train 10. The cooling device 13 may be a cooling bed or the like. The cooling bed is prior art and will not be described here.

The working process of the flat steel rolling system of the embodiment is as follows:

heating a rolled piece blank 1 to be rolled to 1000-1200 ℃ by a heating device 3;

then, spraying high-pressure water with the pressure of 20-30MPa to the rolled piece 1 to be rolled by a descaling device 4 to remove scale (namely, iron scale) of the rolled piece 1 to be rolled;

and then, carrying out primary rolling on the rolled piece 1 to be rolled, which is subjected to heating treatment by the heating device 3 and descaling treatment by the descaling device 4, by using a universal roughing mill set 5, wherein the rolling temperature is 750-850 ℃, the rolling passes are 6-12, the elongation coefficient of each pass is 1.2-1.5, the rolling linear speed of the first universal roughing mill is 0.5-1m/s along the running direction of the rolled piece 1, and four rollers of the same universal roughing mill, namely a horizontal roller 21 and a vertical roller 22, are on the same rolling surface.

The irregular cross-section of the rolled stock 1 after preliminary rolling by the universal roughing mill train 5 is then removed by means of the first shearing device 6.

And then, further rolling the rolled piece 1 sheared by the first cutting device 6 by using a universal middle rolling mill unit 7, wherein the rolling temperature is 750-850 ℃, the rolling passes are 6-12, the elongation coefficient of each pass is 1.3-1.4, and four rollers, namely a horizontal roller 21 and a vertical roller 22, of the same universal middle rolling mill are on the same rolling surface.

The temperature of the rolled stock 1 is then adjusted to 750-850 ℃ by means of a first temperature adjustment device 8, and the irregular cross-section of the rolled stock 1, after rolling by means of the universal intermediate rolling mill train 7, is removed by means of a second shearing device 9.

And then, performing finish rolling on the rolled piece 1 sheared by the second shearing device 9 by using a universal finish rolling mill unit 10, wherein the rolling temperature is 750-850 ℃, the rolling passes are 6-12, the elongation coefficient of each pass is 1.2-1.5, and four rollers of the same universal finish rolling mill, namely a horizontal roller 21 and a vertical roller 22, are on the same rolling surface.

Then, removing the irregular section of the rolled piece 1 rolled by the universal finishing mill unit 10 through a third shearing device 12, and cooling the temperature of the rolled piece 1 to room temperature through a cooling device to obtain a flat steel finished product;

in the rolling process, the rolling linear velocity of a downstream rolling mill is the product of the rolling linear velocity of an adjacent upstream rolling mill and the elongation coefficient of the downstream rolling mill (a universal roughing mill, a universal medium rolling mill, a universal finishing mill and the like).

Referring to fig. 11, fig. 11 is a schematic structural view of a flat steel rolling system according to another exemplary embodiment of the present application.

As shown in fig. 11, the flat steel rolling system of the present embodiment further includes a pre-rolling mill 14 and a power structure 15.

The pre-rolling mill 14 is located between the heating device 3 and the universal roughing train 5. The pre-rolling mill 14 is embodied as a universal slab blooming mill. The universal slab blooms mill is prior art and will not be described herein. Specifically, the pre-rolling mill 14 can perform multi-pass reversible pre-rolling on different types of rolled pieces 1 to be rolled, so that the flat steel rolling system is adapted to the production requirements of the incoming materials containing different types of rolled pieces 1. The rolling temperature of the pre-rolling mill 14 is 750-850 ℃, and the rolling pass of the pre-rolling mill 14 is 5-9 times.

The power structure 15 is connected with a horizontal roll 21 and a vertical roll 22 of the universal roughing mill and/or the universal medium rolling mill and/or the universal finishing mill, and the power structure 15 can adopt an electric motor, a hydraulic motor and the like. Electric motors and hydraulic motors are prior art and are not described herein. The power mechanism 15 connected with the horizontal roll 21 and the vertical roll 22 of the universal rolling mill is arranged, so that the positions of the horizontal roll 21 and the vertical roll 22 can be adjusted, and the shape and the size of a rolling hole formed by the horizontal roll 21 and the vertical roll 22 can be adjusted, so that the rolling requirements of flat steels with different dimensions can be met.

In this application, the two vertical rolls 22 of the same universal roughing mill and/or the same universal finishing mill of the same intermediate roughing mill and/or the same intermediate-energy roughing mill may be shifted back and forth by a predetermined distance (e.g., 5 to 10 cm) and/or the two horizontal rolls 21 may be shifted back and forth by a predetermined distance (e.g., 5 to 10 cm) during rolling so that the four rolls, i.e., the horizontal rolls 21 and the vertical rolls 22, of the same universal finishing mill of the same universal roughing mill and/or the same intermediate-energy roughing mill are not on the same rolling surface.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a universal mill, includes two horizontal rolls along vertical direction subtend setting and two edgers along horizontal direction subtend setting, two horizontal rolls and two edgers roll form roll hole and roll gap together, its characterized in that, horizontal roll and edger roll all adopt the drive roller.

2. A universal rolling mill train comprising at least 2 universal rolling mills according to claim 1 arranged in upstream and downstream relationship.

3. Universal rolling mill train according to claim 2, characterized in that the apertures and/or roll gaps of adjacent universal mills upstream and downstream are staggered.

4. A flat steel rolling system is characterized by comprising a heating device, a universal roughing mill unit, a universal middle mill unit, a universal finishing mill unit and a cooling device which are arranged in sequence; the universal roughing train and/or the universal intermediate train and/or the universal finishing train comprising at least 2 universal mills according to claim 1 arranged upstream and downstream.

5. The flat steel rolling system of claim 4 further comprising a descaling device located between the heating device and the universal finishing train.

6. The flat steel rolling system of claim 4 further comprising a first cut-out device between said universal roughing mill train and said universal intermediate mill train and/or a second cut-out device between said universal intermediate mill train and said universal finishing mill train.

7. The flat steel rolling system of claim 4 further comprising a first temperature adjustment device located between said universal middle mill train and said universal finishing mill train and/or a second temperature adjustment device located downstream of said universal finishing mill train.

8. The flat steel rolling system according to claim 7, characterized in that the first temperature regulating device and/or the second temperature regulating device is/are an in-line water cooler or an in-line water mist cooler or an air cooler.

9. The flat steel rolling system of claim 4 further comprising a pre-rolling mill located between the heating device and the universal mid-mill train.

10. The flat steel rolling system of claim 4, further comprising power mechanisms connecting the horizontal and vertical rolls of the universal mill.

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