JPH069704U - Rolling mill - Google Patents

Abstract

(57) [Summary] [Purpose] To expand the crown control capability in a roll-cross type rolling mill. [Structure] The upper and lower work rolls 1 and 2 are arranged in a horizontal plane so as to cross each other and are axially supported so as to be displaceable in the horizontal direction. The upper and lower work rolls 1, 2 are replaced with the backup roll 3 on the input side.
a, 4a and backup rolls 3b, 4b on the delivery side. Each backup roll 3a, 3b, 4a, 4b
A tilting device 11 for tilting the device in a vertical plane is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rolling mill in which upper and lower work rolls are arranged in a cross in a horizontal plane to roll a plate material.

[0002]

[Prior art]

 In recent years, the requirements for the thickness accuracy of rolled products in the plate width direction have become increasingly strict. Generally, the hot coil has a middle height in the plate width direction.Therefore, in order to cancel the thickness, the work roll is provided with an initial crown in advance, or the work roll is bent. Etc. are known.

However, in the case of a method in which a work roll is provided with a crown, the number of rolls corresponding to the rolling conditions such as the plate width and the thickness of the plate material is held, and the number of rolls varies depending on the rolling conditions. The roll of the crown must be replaced, which causes a problem of lowering the operating rate.On the other hand, in the case of the method of bending the work roll, due to the strength of the roll neck of the work roll, Since there is a limit to the bending force that can be applied, there is a problem that it is not possible to obtain sufficient thickness distribution correction ability in the plate width direction.

Therefore, as shown in an example in FIG. 5, the upper work roll 1 and the upper backup roll 3 and the lower work roll 2 and the lower backup roll 4 are arranged parallel to each other while keeping their axes horizontal, and the upper pair rolls are respectively arranged. Also, a pair roll cross type rolling mill has been developed, which constitutes the lower pair roll and rolls the plate material 5 with the axes of the upper and lower pair rolls intersecting each other in the horizontal plane (Actual exploitation Sho 62-19361). issue). In this rolling mill, the thickness distribution in the width direction of the plate 5 can be controlled by adjusting the crossing angle (cross angle) of the upper and lower pair rolls, and the product can be rolled into a uniform plate thickness. It is a thing.

[0005]

[Problems to be solved by the device]

 However, in the case of the above-mentioned pair roll cross type rolling mill, although it is effective for its original purpose in that it has a so-called crown control capability that cancels the roll deflection and corrects the thickness distribution in the strip width direction, Since the backup roll is in contact with the upper work roll just above it, and with the lower work roll just below it, the ability to hold the horizontal force acting on the work roll is small, and thin plates and difficult-to-machine There is a problem that it is not possible to use a small-diameter work roll suitable for rolling the material. Further, in the pair cross type rolling mill, in order to cross the backup roll, for example, a cross device having a complicated mechanism as shown in Japanese Patent Publication No. 63-1268 is required.

Therefore, the present invention is intended to provide a roll-cross type rolling mill having a greater crown control capability, capable of using a small-diameter work roll, and having a simple cross device.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention arranges the upper and lower work rolls so as to be horizontally displaceable so as to cross each other in a horizontal plane, and to displace the upper and lower work rolls in the vertical direction. It is configured to be supported by two upper and lower backup rolls that are axially supported, and further provided with a tilting device for tilting each of the backup rolls in a vertical plane.

[0008]

[Action]

 If the upper and lower work rolls are supported by two backup rolls, respectively, the positions of the work rolls directly above and below are not restricted, and the crown control capability can be increased. Also, when the four backup rolls are tilted and displaced in the vertical direction by associating them with a tilting device, the upper and lower work rolls are displaced along the backup rolls, so that an arbitrary angle can be set from a small cross angle to a large cross angle. It will be possible.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention. Like the rolling mill shown in FIG. 5, a rolling mill in which upper and lower work rolls 1 and 2 are arranged to cross each other in a horizontal plane. In the above, the guide blocks 7 are respectively fixed to the inner front and rear inner side surfaces of the window 6a of the housing 6, and the upper and lower work roll chocks 8 and 9 are horizontally displaceable between the front and rear guide blocks 7. Then, the upper and lower work roll chocks 8 and 9 are made to support the upper and lower work rolls 1 and 2, and the upper and lower backup rolls 3a and 4a are provided on the entry side of the pass line L by the upper and lower work rolls 1 and 2 and the pass line L The upper and lower backup rolls 3b and 4b are respectively arranged on the output side of the upper and lower work rolls 1 and 2 and two upper and lower backup rolls 3a, 3b and 4a, 4b, respectively. The backup roll chocks 10 are arranged above and below the window 6a of the housing 6 so as to correspond to the backup rolls 3a, 3b, 4a and 4b, and the backup roll chocks 10 can be moved up and down. In the roll chock 10, the axes of the backup rolls 3a, 3b, 4a, 4b are tiltably supported via spherical differences, and the upper backup rolls 3a, 3b and the lower backup rolls 4a, 4b are vertically supported. An upper and lower tilting device 11 for tilting inside is provided, and by driving the tilting device 11, the backup rolls 3a, 3b, 4a, 4b are associated with each other to perform tilting operation, and thereby the cross angles of the upper and lower work rolls 1 and 2 are arbitrarily set. To be set to.

The tilting device 11 includes worm wheel mechanisms 12a and 12b installed on the upper and lower portions of the working-side and driving-side housings 6 so that the backup roll chocks 10 can be moved up and down, and the working-side and driving-side worm wheels. The mechanism 12a, 12b is provided with a motor 14 for applying a driving force to the mechanism 12a, 12b via transmission gears 13a, 13b. The worm wheel mechanisms 12a and 12b are composed of a normal worm 15, a worm wheel 16 and a worm screw 17, and are driven in the opposite directions by the meshing of the transmission gears 13a and 13b. Further, the lower worm wheel mechanisms 12a and 12b are incorporated in an elevating block 19 which is vertically moved by a reduction cylinder 18.

In the above configuration, when rolling work is performed, in addition to the effect of arranging the upper and lower work rolls 1 and 2 on a cloth, the upper backup rolls 3a and 3b and the lower backup rolls 4a and 4b are respectively placed on the upper work roll 1 Since the upper work roll 1 and the lower work roll 2 are in contact with a position deviated from the position directly above and below the lower work roll 2 and the vertical deflection of the upper work roll 1 and the lower work roll 2 is not restricted as compared with the conventional rolling mill, the crown control capability is improved. It can be large.

Now, FIG. 3A showing a state where one end surface of each roll of FIG. 1 is directly viewed from the front side on the working side (front side) and the other end surface of the driving side (back side) of each roll on the front side. In (b) of FIG. 3 showing the state seen through from above, when adjusting so as to further increase the cross angles of the upper and lower work rolls 1 and 2 in the positions indicated by the solid lines, the upper and lower work rolls shown in FIGS. The tilting device 11 is used. That is, the motors 14 drive the upper worm wheel mechanisms 12a and 12b to operate the backup roll chocks 10 up and down, and as shown in FIG. While tilting and displacing in the vertical plane as a fulcrum, as shown in (d) of FIG. 3, the upper backup roll 3b on the outlet side is moved in the vertical plane in the opposite direction to the backup roll 3a on the inlet side with the roll center of gravity G as a fulcrum. Tilt displacement with. As a result, the two back-up rolls 3a, 3b are displaced in the vertical direction from each other by displacing each end face from the position of the solid line to the position of the chain double-dashed line, as shown in (a) and (b) of FIG. As a result, the upper work roll 1 is displaced from the position indicated by the solid line to the position indicated by the alternate long and two short dashes at each end face, and as a result, the horizontal arrangement angle is changed.

Similarly, by driving each of the lower worm wheel mechanisms 12a and 12b, the two lower backup rolls 4a and 4b are made to correspond to the tilting operation of the upper backup rolls 3a and 3b, and the lower backup rolls 4a and 4b shown in FIG. (C) When tilt-displaced in the same direction as shown in (d), the end surfaces of the lower backup rolls 4a and 4b move from the solid line position to the two-dot chain line position as shown in (a) and (b) of FIG. As a result, each end surface of the lower work roll 2 is displaced from the position of the solid line to the position of the chain double-dashed line as a result of the displacement of the lower work roll 2 to the upper work roll 1 as a result. It is changed in the opposite direction. Therefore, the cross angle between the upper and lower work rolls 1 and 2 is adjusted more greatly.

In this way, when the four backup rolls 3a, 3b, 4a, 4b are associated and displaced so as to tilt around the roll center of gravity G position in the vertical plane, the upper and lower work rolls 1, 2 are respectively backed up. Since it can be displaced along the rolls 3a, 3b, 4a, 4b, the cross angle can be easily changed, and an arbitrary angle can be set from a small cross angle to a large cross angle. .

Next, FIGS. 4A and 4B show another embodiment of the present invention. The tilting device 11 for tilting each back-up roll is the worm wheel mechanism in the above embodiment. Instead of the configuration, a wedge mechanism is used. That is, a wedge block 20 having an inverse slope is slid in the roll axis direction on the upper and lower portions of the backup roll chock 10 on the working side and the driving side (only the lower portions are shown because they are on the lower backup rolls 4a and 4b side in the figure). The reverse screw shafts 21 are freely threadedly engaged with each other and the reverse screw shafts 21 are screwed through the wedge blocks 20 on the working side and the drive side, respectively, and the reverse screw shafts 21 are connected to the transmission gears 13a and 13b. The backup roll chock 10 is connected to the motor 14 via a screwdriver, and the reverse screw shaft 21 is driven to bring the work side and drive side wedge blocks 20 close to and away from each other so that each backup roll can be tilted. Is. 4, the same parts as those in FIG. 1 are designated by the same reference numerals.

Also in the case of the embodiment shown in FIG. 4, the same effects as those of the above embodiment can be obtained.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[0019]

[Effect of device]

 As described above, according to the rolling mill of the present invention, the upper and lower work rolls pivotally supported so that they can be crossed in the horizontal plane are supported by the two upper and lower backup rolls, respectively. The work rolls can be brought into contact with positions outside the vertical position, and the vertical deflection of the top and bottom work rolls can be made less constrained as compared to conventional rolling mills, which allows the crown control capability to be improved. Since the backup rolls can be tilted and displaced in a vertical plane by a tilting device, the backup rolls can be associated with each other to perform tilting operations, thereby increasing the cross angle of the upper and lower work rolls. It has excellent effects such as easy setting from corner to small cross angle.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a rolling mill of the present invention.

FIG. 2 is a plan view of a tilting device in the rolling mill of FIG.

FIG. 3 shows a roll cross angle adjustment method.
Is a schematic view of one end face of each roll as viewed from the front, (b)
Is a schematic view of the other end of each roll seen from the front, (C)
Is a view from the arrow A-A of (a), and (d) is a view from the arrow BB of (a).

FIG. 4 shows another embodiment of the rolling mill of the present invention,
(A) is a partial schematic front view, and (B) is a CC arrow view of (A).

FIG. 5 is a schematic view showing an example of a conventional pair roll cross type rolling mill.

[Explanation of symbols]

 1 Upper work roll 2 Lower work roll 3a, 3b Upper backup roll 4a, 4b Lower backup roll 11 Tilt device

Claims (1)

[Scope of utility model registration request] 1. Two upper and lower work rolls, which are rotatably supported in the horizontal direction and arranged so as to cross in a horizontal plane, and the upper and lower work rolls are rotatably supported in the vertical direction. Supported by the backup roll of
A rolling mill comprising a tilting device for tilting each of the backup rolls in a vertical plane.