JPH0747122Y2 - Rolling mill - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill, and more particularly to a rolling mill capable of exchanging and rolling work rolls of a plurality of sizes.

In conventional steel and non-ferrous metal sheet rolling mills, the diameter of the work roll that is in direct contact with the sheet is a major factor that determines rolling characteristics such as rolling reaction force and rolling limit sheet thickness. ,
Select the optimum roll diameter according to the rolling conditions such as strip thickness. However, with the recent diversification of products, the rolling conditions imposed on a single rolling mill have become extremely wide, and it cannot be said that the rolling can be performed in an optimal state for all rolling conditions. Further, when the width of the rolled state is extremely wide, it is the current situation that a plurality of rolling mills have to cope. Although there are various types of rolling mills, they are generally and technically determined by the relationship between the work roll (D) and the work roll cylinder length (L) (that is, L / D: roll slenderness ratio). The factors that determine L / D are the material of the rolled material, strip width, material thickness, and product thickness.
The harder the material and the thinner the product, the smaller the work roll diameter needs to be in terms of plastic mechanics. As the work roll diameter becomes smaller, the roll rigidity becomes weaker, so the roll support system and drive system change correspondingly, and therefore the optimum rolling mill type is determined. In the past, the optimum work roll diameter, that is, the optimum rolling mill model was determined according to the actual production situation of high-mix low-volume production or low-quality high-volume production.

However, there is a limit to the rolling work that can be handled with the optimal work roll diameter once selected and the type of rolling mill, and the fact is that new steel types and materials with different dimensions cannot be rolled accurately, stably and efficiently.

Typical prior art is disclosed in, for example, Japanese Patent Laid-Open No. 63-13603. In this prior art, a first rolling mill having a pair of upper and lower work rolls, an intermediate roll, and a back up roll and a second rolling mill having a pair of upper and lower work rolls and a back up roll can be combined and combined. In the rolling mill, a movable guide block equipped with a roll bending device for moving and adjusting the intermediate roll of the first rolling mill in the roll axial direction and for controlling the shape of the material to be rolled is provided in the second rolling mill. The work roll is configured to move in the axial direction of the roll and also serves as a movable guide block equipped with a roll bending device.

In such a prior art, the so-called 6-high type first rolling mill and the 4-high type second rolling mill are used in common.
Although the emphasis is placed on improving the edge drop correction ability by the stepped type, the edge drop is, in principle, the effect of the axial deflection of the roll and the contact flatness between the roll materials, and at the same time suppresses the contact flatness by making the work roll smaller. From the standpoint of increasing the bending effect, the 4-high large diameter work roll rolling mill does not have the plate shape control and edge-edge correction capability of the 6-high rolling mill. Therefore, the 6-stage type and 4-stage type recombining type does not have the advantage over the 6-stage type large, medium and small diameter work roll recombining type. That is, in order to deal with further widening, thinning, and hardening of the material to be rolled, and further aiming at the strong reduction rolling, it is indispensable to further reduce the diameter of the work roll. If the work roll has a smaller diameter, the rigidity of the work roll becomes smaller, so
In order to increase the stability against horizontal force, it is necessary to provide a horizontal side support roll that supports one side of the work roll downstream of the work roll in the rolling direction. Therefore, in order to be able to rearrange work rolls from large diameters to such small diameters, it is necessary to change the support structure of the work rolls, resulting in a major modification of the structure and operation of the rolling mill. It is extremely detrimental.

Problem to be Solved by the Invention The purpose of the present invention is to enable the diameter of a work roll to be appropriately and drastically changed, and thereby to efficiently respond to changes in a wide range of rolling conditions. It is to provide a rolling mill.

Means for Solving the Problems The present invention has a horizontal intermediate roll and a horizontal side support roll connected to a pair of upper and lower work rolls between housings arranged on both sides of a material to be rolled. Above and below the roll, an intermediate roll and a back up roll having an axis horizontally displaced from the axis of the work roll, or a rolling machine having only back up roll having an axis horizontally displaced from the axis of the work roll, respectively. A cassette for supporting the work rolls is provided for each of the work rolls of a plurality of sizes, and the cassette can be replaced with a housing, and the cassette is an intermediate roll and a back up roll which are provided in the housing in a pair in the upper and lower sides, Or you can check the work roll supported by only back up roll. In addition to holding the work roll on one side, it is equipped with a horizontal intermediate roll and a horizontal side support roll, and the roll chuck that incorporates the upper and lower work rolls respectively has a horizontal side support roll rather than a work roll. A first locking member is provided on the opposite side part, and the first locking member projects outward from the side part of the roll chock incorporating the work roll and in a virtual plane perpendicular to the axis of the work roll. , Which has locking projections 41 and 43 formed in an inverted L shape and which protrudes downward, and on the side opposite to the horizontal side support roll with respect to the work rolls, in each housing, each work roll that can be displaced up and down. Bend blocks forming a pair are respectively provided to the pair of bend blocks, and the second locking member 35 extends across the bend blocks. a and 35b are provided, and the second locking members 35a and 35b are formed in an L shape in an imaginary plane perpendicular to the work roll side and project from the bend block to the work roll side, and are opened upward. Stop groove 40
It has a and 40b, and the locking projections 41 and 43 of the first locking member fit into the locking grooves 40a and 40b of the second locking member and lock so that the work roll can be pulled out and inserted together with the roll chuck. The rolling mill is characterized by

The present invention also incorporates bend blocks 36 and 37 for incorporating the work rolls, respectively, on the side of the work rolls opposite to the horizontal side support rolls so that the chucks are vertically displaced toward and away from each other. By the shift blocks 52, 54 provided with a pair of hydraulic cylinders 65, 65c arranged above and below, respectively, the vertical planes 5 of the upper and lower intermediate rolls or back up rolls can be displaced toward and away from each other. To do.

According to the present invention, the work rolls, for example, cassettes for supporting the work rolls are provided for each of the work rolls of a plurality of sizes, and the cassettes can be exchanged with the housing, so that it can be combined with various production schedules. It becomes possible to replace two or more work rolls having different diameters into a common rolling mill housing of a cartridge type having the same outer dimensions. As a result, it is possible to bring about economic effects such as rationalization of equipment and reduction of equipment investment while realizing high shape controllability.

The cassette also supports a small diameter work roll chuck and a horizontal roll for supporting the work roll on one side. The horizontal roll may be a combination of a horizontal intermediate roll and a horizontal side support roll, or alternatively may be a horizontal side support roll only. Particularly, in the rolling mill of the present invention, the intermediate roll and the back up roll have an axis deviated from the work roll axis in the horizontal direction (to the right in FIG. 5, which will be described later), or only the back up roll is provided. Also in the rolling mill, the axis of the back-up roll is displaced from the axis of the work roll in the horizontal direction, and in the rolling mill having such a configuration, the roll chuck for the upper and lower work rolls has a horizontal position with respect to the work roll. A first locking member is provided on the side opposite to the side support rolls, and the first locking member has a locking projection protruding downward and is arranged on both sides of the material to be rolled. The housings 10 and 11 are provided with a pair of bend blocks on the side opposite to the horizontal side support rolls with respect to the work rolls. The pair of bend blocks is provided with a second locking member having a locking groove opened upward, extending between the bend blocks, and thus the locking projection of the first locking member is provided. Is the second
By fitting and locking in the locking groove of the locking member,
The roll chuck of the work roll can be supported by a cantilever and pulled out to be inserted. In this way, the structure of the cantilever support of the roll chuck of the work roll can facilitate the roll exchange.

Embodiment FIG. 1 is a side view showing a usage state of a rolling mill according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a part thereof.
The pair of inverted U-shaped housings 10 and 11 are provided at fixed positions, and windows 12 and 13 are formed in these housings 10 and 11, and a pair of upper and lower parts shown in FIG. Large-diameter work rolls 8a, 8b, intermediate rolls 9a, 9b, and back-up rolls 4a, 4b are provided, or the medium-diameter work rolls 8al, 8bl shown in FIG. Rolls 9al, 9bl and backup rolls 4a, 4b are provided, or as shown in Fig. 1 (3), work rolls 2a, 2b of small diameter, intermediate rolls 3a, 3b, backup rolls are provided. 4a and 4b are provided, and these small-diameter work rolls 2a and 2b are horizontally supported on one side of the work rolls 2a and 2b on the downstream side (the left side in FIG. 1 (3)) of the material to be rolled in the rolling direction. Intermediate rolls 6a, 6b and horizontal side support rolls 7a, 7b are provided.

The side walls of the windows 12 and 13 of the housings 10 and 11 face each other with a recess 1
4,15; 16,17 are formed. The recesses 14 and 15 are provided with position adjusting means 80 common to the usage patterns of FIGS. 1 (1) to 1 (3). Cartridges 81 to 83 individually corresponding to the respective usage patterns of FIGS. 1 (1) to 1 (3) are removably mounted in the other recesses 16 and 17.

The above-mentioned FIG. 2 shows the large-diameter work rolls 8a, 8 of FIG. 1 (1).
A cartridge 81 for supporting b is shown, and FIG. 3 is an enlarged sectional view of the work rolls 8a and 8b and its vicinity. Work rolls 8a, 8b and intermediate rolls 9a, 9b and back up roll 4
The axes of a and 4b are in a common vertical plane 5. The specific configuration of the position adjusting means 80 will be described later with reference to FIG. In the following description, the subscripts a and b may be omitted and may be generally shown. Work roll 8 check 85
A guide groove 86 is formed in the guide groove 86, and the guide protrusions 88 of a pair of upper and lower bend blocks 87 are fitted in the guide groove 86. One end of a piston rod 89 is fixed to the bend block 87a, and a piston 90 fixed to the other end of the piston rod 89 is housed in a cylinder chamber 91 formed in the bend block 87b and is used as pressure oil. Therefore, the bend blocks 87a, 87b are driven in the approaching direction and the separating direction, and the vertical positions of the work rolls 8a, 8b can be adjusted accordingly. The bend blocks 87a and 87b are mounted on the cassette body 81 so as to be vertically displaceable. This cassette body 81 is made up of the housing 10,1
It can be installed in the recesses 16 and 17 of 1 and can be removed.

A locking groove 93 is formed on the chuck 85.
93 is fitted and locked to the rail 35 of the position adjusting means 80, so to speak, cantilevered, and the chuck 85 can be pulled out or inserted in the horizontal direction perpendicular to the rolling direction.

FIG. 4 is an enlarged cross-sectional view showing a state where the medium diameter work roll shown in FIG. 1 (2) is mounted on the housing 10. The guide projections of the bend blocks 95a and 95b are fitted into the guide grooves of the work roll 8al and 8bl chucks.
The fact that the bend blocks 95a and 95b are driven by pressure oil toward and away from each other is similar to the cassette 81 described with reference to FIG. 3 above. In particular, in this cassette 82, the upper and lower bend blocks 95a and 95b are mounted on a holder 96, and the holder 96 is mounted on the cassette body 97. The wedge piece 98 is interposed between the holding body 96 and the cassette main body 97, and accordingly, the horizontal position of the work rolls 8al, 8bl can be adjusted. In this embodiment, during rolling, the work rolls 8al, 8bl and the intermediate rolls 9al, 9bl,
Each axis with the back-up rolls 4a, 4b lies in a vertical plane 5. A reduction cylinder 198 is provided in the upper part of the housing 10, and a locker plate 99 is provided in the lower part of the housing 10, and the locker plate 99 is provided to support the chuck of the back up roll 4b. It is not necessary to unnecessarily lengthen the stroke of the reduction cylinder 198, which can improve the controllability of the plate thickness and the like, and the passage position of the material to be rolled can be adjusted to the thickness of the rocker plate 99. Therefore, the above-mentioned Fig. 1 (1)
It is possible to set a fixed position irrespective of each usage mode of FIG. 1 (3), and it is possible to easily automate the roll replacement work. The other housing 11 has a similar structure.

FIG. 5 is a sectional view around the work rolls 2a and 2b showing the use mode of FIG. 1 (3) described above, and FIG. 6 is a sectional view showing a concrete structure of the position adjusting means 80. Intermediate roll
Each axis of 3a, 3b and back up rolls 4a, 4b has a vertical plane 5
The work rolls 2a and 2b are located inside, and the axes of the work rolls 2a and 2b are located at the downstream side in the rolling direction (to the left in FIG. 5). A cylinder 45 is connected to the bend block 37 by a pin 46, and its piston rod 47 is connected to the bend block 37 by a pin 48.
Combined with 36. The axes of the pins 46 and 48 are parallel to the vertical plane 5, respectively.

The bend blocks 36, 37 are formed with guide protrusions 50, 51 extending on both sides, that is, in a direction perpendicular to the rolling direction 1 of the material to be rolled. The guide protrusion 50 is fitted in a guide groove 53 formed in the shift block 52, whereby the bend block 36 can be displaced vertically. The guide protrusion 51 formed on the other bend block 37 is fitted in the guide groove 55 of the shift block 54 and is vertically displaceable. Guide projections 59, 60 formed in the recess 14 of the housing 10 are fitted into guide grooves 56, 57 formed in the upper and lower portions of the shift blocks 52, 54, respectively, whereby the shift blocks 52, 54 are formed. Is displaceable in the direction perpendicular to the vertical plane 5. A threaded portion 62 formed at the tip of the piston rod 61 is inserted into the shift block 52 and fixed by a bolt 63. The piston 64 fixed to the piston rod 61 is
It is housed in a right-cylindrical chamber 66 of a cylinder 65 fixed to the housing 10. The cylinder 65 has a stepped contact portion.
A storage part 67 having a diameter larger than that of the room 66 is formed via 67a,
An annular body 68 is stored in the storage portion 67. The piston rod 61 is gently inserted into the annular body 68. The cylinder 65 has
A lid 69 through which the piston 61 is gently inserted is fixed. In this way, a chamber 70 having a length d2 along the axial direction of the piston rod 61 is formed between the annular body 68 and the lid 69. Abutment 67
A chamber 71 is formed between the piston 64 and the annular body 68 facing the a. The other shift block 54 has a similar structure, and the corresponding portion is shown with a subscript c.

In this way, the shift blocks 52, 54, and hence the bend blocks 36, 37, can be displaced toward and away from the vertical plane 5, so that when the work roll 2a is displaced as indicated by reference numeral 2al, Cylinder 45 pin 4
A straight line 73 passing through the axes of 6, 48 can be tilted with respect to the vertical plane 5 as indicated by an angle θ. The horizontal intermediate roll can be angularly displaced to the work roll 2 around the axis 74 of the horizontal side support roll 7, and the work roll 2 can be displaced in the rolling direction 1.

FIG. 7 is a perspective view of the cassette 83 and the work roll 2a, and FIG. 8 is a sectional view thereof. With reference to these drawings, the work roll 2a is supported by the roll chucks 27 and 28. The shaft 12 of the horizontal intermediate roll 6a is supported by a chuck 13, which is displaceable along an arm 15. A shaft end 18 of a common rotating shaft 17 of the plurality of horizontal side support rolls 7a is inserted into an arm 15, and the arm 15 can be angularly displaced about the same axis as the axis of the horizontal side support rolls 7a. A block 19 is provided on the shaft end portion 18, and the block 19 is held by the cartridge body 20.

A plurality of moving bodies 22 are provided on the rotating shaft 17 of the horizontal side support roll 7a. The rotating shaft 17 is rotatably inserted in the moving body 22. This moving body 22 is a cartridge main body 20.
It is held in place and can be displaced in the moving direction 1, 1a of the rolled material. Each moving body 22 abuts on a wedge 23 interposed between a common supporting bridge 24 fixedly provided between the housings 10 and 11. The wedge 23 can be displaced up and down by a plurality of hydraulic cylinders 100, whereby a desired gap shape of the work rolls 2a, 2b, that is, a plate crown can be obtained.

In another embodiment of the present invention, the intermediate rolls 9a, 9b; 9al, 9bl; 6
a and 6b may be omitted.

In the above example, the intermediate rolls 9a, 9b; 9al, 9bl; 3a, 3
The exchange of b can be accomplished by a structure similar to cassette 81. The pair of housings 10 and 11 are arranged on both sides of the material to be rolled. Locking protrusion 41, 42
Of the work roll 2a protrudes outward (to the right in FIG. 6) from the side of the work roll 2a opposite to the horizontal side support roll (to the right in FIG. 6) with respect to the work roll. These locking protrusions 41 and 42 are provided on the work roll 2
In an imaginary plane perpendicular to the axis of a, it is formed in an inverted L shape,
The locking protrusions 41 and 42 project downward.

Each housing 10, 11 also has a side opposite to the horizontal side support roll 7a with respect to the work roll 2a (on the right side in FIG. 6).
Then, bend blocks 36, 38; 37, 39 forming a pair are provided for each work roll 2a, 2b which can be displaced up and down. Bend block 36, 38 forming a pair corresponding to the work roll 2a
A rail 35a is provided on the rail extending between the bend blocks 36 and 38. Similarly, the pair of bend blocks 37, 39 corresponding to the other work roll 2b also has a rail 3 extending between the bend blocks 37, 39.
5b is provided. Rails 35a and 35b are bent block 36
Locking grooves 40a that project from the work rolls 2a and 2b to the left (to the left in FIG. 6) and are formed in an L shape in an imaginary plane perpendicular to the axis of the work rolls 2a and 2b and open upward. , 40b.

The hydraulic cylinders 65, 65c are arranged in a pair in the upper and lower sides.The hydraulic cylinders 65, 65c are provided in the shift blocks 52, 54, and the respective chucks 27, 28 incorporating work rolls of different sizes are shifted. With respect to the vertical planes 5 of the upper and lower intermediate rolls or back up rolls by the blocks 52, 54, that is (before and after the direction in which the rolled material is guided),
It is possible to move close to and away from each other.

When exchanging the small-diameter work rolls 2a, 2b, the work roll 2a and the roll chucks 27, 28 can be pulled out or inserted and replaced with the horizontal intermediate roll 6 retracted to the exit side, that is, the left side in FIG. it can.

As described above, according to the present invention, since the cassettes for supporting the work rolls are provided for each of the work rolls having a plurality of sizes, that is, different diameters, and the cassettes can be exchanged with the housing, the housing can be shared. By using it, the work roll diameter can be appropriately and drastically changed to efficiently respond to the change of the rolling condition in a wide range.
According to the present invention, in a rolling mill having an intermediate roll and a back-up roll that are horizontally displaced from the axis of the work roll, or a back-up roll that has an axis that is horizontally displaced from the work roll axis, A first locking member that projects outward from the side of the roll chuck incorporating the work roll that is opposite to the horizontal side support roll than the work roll is provided.
It has a locking protrusion that is formed in an inverted L shape and projects downward,
In addition, in the housings arranged on both sides of the material to be rolled, a pair of bend blocks for each work roll,
The second locking member is provided on the opposite side of the work roll from the horizontal side support roll, and the second locking member is provided across the pair of bend blocks, and the second locking member is formed in an L shape. And the work rolls are incorporated by engaging the locking projections of the first locking member with the locking grooves of the second locking member to lock the locking rolls. Since the roll chuck is supported in a cantilever manner and can be pulled out and inserted, the work rolls can be easily replaced, the work time can be shortened, and the work rolls can be automatically reassembled.

[Brief description of drawings]

FIG. 1 is a side view showing a usage mode of the rolling mill of the present invention, and FIG.
FIG. 3 is an exploded perspective view of a part of the structure when rolling using the large diameter work rolls 8a and 8b of FIG. 1 (1),
The figure is an enlarged cross-sectional view near the large-diameter rolls 8a, 8b shown in Fig. 2, and Fig. 4 is a cross-section when using the medium-diameter work rolls 8al, 8bl in the use mode of Fig. 1 (2). Figure,
FIG. 5 shows the work rolls 2a and 2b when the small-diameter work rolls 2a and 2b in the use mode of FIG. 1 (3) are used.
FIG. 6 is an enlarged cross-sectional view of the vicinity, FIG. 6 is a cross-sectional view showing a specific structure of the position adjusting means 80 in FIG. 5, FIG. 7 is a perspective view showing the cartridge 83 and the work roll 2a, and FIG. And FIG. 2a, 2b; 8a, 8b; 8al, 8bl ... work roll, 3a, 3b; 9a, 9b; 9
al, 9bl …… intermediate roll, 4a, 4b …… back up roll, 6a, 6b …… horizontal intermediate roll, 7a, 7b …… horizontal side support roll, 10,11 …… housing, 14,15; 16,17… …
Recesses, 80 …… position adjustment means, 81,82,83 …… cassettes

Claims (2)

[Scope of utility model registration request] 1. A horizontal intermediate roll and a horizontal side support roll, which are connected to a pair of upper and lower work rolls, respectively, between housings arranged on both sides of a material to be rolled, and have work pieces above and below each work roll. A cassette supporting a work roll in a rolling mill having only an intermediate roll and a back up roll having an axis horizontally displaced from the axis of the roll, or a back roll having only a back up roll having an axis horizontally displaced from the axis of the work roll. Is provided for each of the work rolls of a plurality of sizes, the cassette can be exchanged with the housing, and the cassette is an intermediate roll and a back up roll provided on the housing in a pair in the upper and lower sides, or only with the back up roll. , While supporting the supported work roll check, The roll check equipped with horizontal intermediate rolls for supporting the rolls on one side and horizontal side support rolls, and incorporating the upper and lower work rolls respectively, has a side on the opposite side of the work rolls from the horizontal side support rolls. A first locking member is provided, and the first locking member protrudes outward from the side portion of the roll chuck incorporating the work roll, and has an inverted L shape in an imaginary plane perpendicular to the axis of the work roll. It has the locking projections 41 and 43 that are formed and protrude downward, and on the opposite side of the work roll from the horizontal side support roll. Are provided respectively, and the paired bend blocks are provided with second locking members 35a, 35b extending between the bend blocks. Locking members 35a, 35b are locking groove protrudes work roll side and formed in an L-shape in a virtual plane perpendicular to the axis of the work roll is open upward from Bendoburotsuku 40
It has a and 40b, and the locking projections 41 and 43 of the first locking member fit into the locking grooves 40a and 40b of the second locking member and lock so that the work roll can be pulled out and inserted together with the roll chuck. A rolling mill characterized by: 2. Bend blocks 36 and 37 for moving the chucks incorporating the work rolls, respectively, on the side opposite to the horizontal side support rolls relative to the work rolls so that the chucks are vertically displaced toward and away from each other. By the shift blocks 52, 54 provided with a pair of hydraulic cylinders 65, 65c arranged above and below, respectively, the vertical planes 5 of the upper and lower intermediate rolls or back up rolls can be displaced toward and away from each other. The rolling mill according to claim 1, which is a utility model registration claim.