JPS625761Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a multi-high rolling mill equipped with a mechanism for controlling the shape of rolled material.

In recent years, various methods of bending work rolls in four-high rolling mills have been developed and implemented in order to control the thickness profile of rolled materials in the width direction.
Conventional roll bending methods have had limitations in their ability to control the shape of rolled materials.

In other words, in order to obtain a rolled product with a good shape and little change in thickness, especially in the thickness direction, deformation of the work rolls due to rolling loads, etc. should be minimized, and the correction ability by roll bending should be increased. This is very important.

Conventional four-high rolling mills only have a vertical roll bending device, so the amount of crown correction of the roll is small, and only a simple parabolic shape is corrected. The shape of the openings and the inside of the openings could be corrected. Furthermore, the effect was small on narrow plates of less than 1/2 of the roll axis length, and a good shape correction effect could not be obtained.

Therefore, in order to eliminate the above-mentioned drawbacks, one of the upper and lower work rolls is made smaller in diameter than the other, the small-diameter work roll is offset in the rolling direction with respect to the other work roll, and the small-diameter work roll is A multi-high rolling mill has been proposed in which horizontal bending is applied by split rolls via a presser roll parallel to the work roll, and this horizontal bending corrects the roll crown in the vertical direction of the work roll. Since it is a roll, if you press the presser roll with a split roll,
Since the presser roll was used, the locally applied force was dispersed and sensitive partial pressure was not transmitted to the work roll.

The present invention was developed with the aim of improving the shape control function by greatly and arbitrarily changing the roll crown in the vertical direction of the work roll. The diameter of the work roll is smaller than that of the roll, and the work roll of the small diameter is offset in the rolling direction from the other work roll, and on the offset side of the work roll of the small diameter, a presser roll, a split roll, and a horizontal bending roll are placed parallel to the work roll of the small diameter. The rolling mill equipped with the device is characterized in that a hydraulic chamber is provided on the inner periphery of the portion of the presser roll that comes into contact with the divided rolls.

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

An upper work roll 3 is disposed below the upper back up roll 1, and an intermediate roll 4 is disposed above the lower back up roll 2.
A lower work roll 5 having a smaller diameter than the upper work roll 3 is disposed between the upper work roll 3 and the intermediate roll 4, and the lower work roll 5 is offset from the upper work roll 3 in the rolling direction.

A casing 7 is attached to the inner surface of the housing 6 of the rolling mill.
and fix the piston rod 8 to the casing 7.
A plurality of sets of hydraulic cylinders 9 _-1 , 9 _-2 ... 9 _-7 are arranged at required intervals in the width direction of the rolling mill so that -1 , 8 _-2 ... 8 _-7 can move forward and backward in the rolling mill line direction _. Piston rods 8 _-1 , 8 _-2 ... are installed on the tip side of the casing 7.
Support plates 10 _-1 , 10 _-2 , . . . 10 _-7 are arranged so as to be able to slide in the direction of the lower work roll 5 by means of 8 _-7 . Support plate 10 _-1 , 10 _-2 ...1
The number of sets of 0 _-7 and the number of sets of fluid pressure cylinders 9 _-1 , 9 _-2 ...9 _-7 are the same, and each support plate 10 _-1 , 1
0 _-2 ...10 _-7 are corresponding fluid pressure cylinders 9
_-1 , 9 _-2 ...9 _-7 allows sliding.

A sideways U with an open surface facing the lower work roll 5 at the tip of the support plate 10 _-1 , 10 _-2 ...10 _-7
A shaft 11 parallel to the lower work roll 5 is inserted into the groove, and the shaft 11 can be supported by the edge of the groove.
0 _-1 , 10 _-7 , fluid pressure cylinders 12a, 12b
a clamp 13a for gripping the shaft 11, which is opened and closed by
13b, each support plate 10 _-1 , 10 _-2
...10 _-7 , split rolls 14 _-1 , 14 _-2 ...14 _-6 are rotatably pivoted to the shaft 11.

Lower work roll 5 and divided rolls 14 _-1 , 14 _-2
...14 _-6 , the presser roll 15 whose center is located on the straight line l connecting the center of the lower work roll 5 and the center of the divided rolls 14 _-1 , 14 _-2 ...14 _-6 is connected to the lower work roll 5. The piston rods 8 _-1 , 8 -2 are arranged parallel to each other, and the piston rods 8 -1 , 8 _-2 are disposed on both end shafts of the presser roll 15, although the presser roll 15 cannot move up and down.
...8 Attach the axle box 16 that guides it so that it can move in the same direction as _-7 , and attach the split roll 1 of the presser roll 15.
4 _-1 , 14 _-2 ... On the inner periphery of the contact portion with 14 _-6 , there are rolls 14 _-1 , 14 _-2 ... whose width is approximately divided as shown in FIG.
Hydraulic chambers 17 _-1 , 17 _-2 ...17 _-6 with width equal to 14 _-6
An oil passage 18 for supplying pressure oil to the hydraulic chambers 17 _-1 , 17 _{-2 .} . . 17 _-6 is bored in the axial direction of the presser roll 15 . The number of oil passages 18 may be one as _shown in the figure, and pressure oil may be sent to each hydraulic chamber _{17 -1 , 17 -2 .}
7 _-6 may each be provided with an independent oil passage.

In the figure, numerals 19 _-1 , 19 _{-2 , . .} . , 19 _-7 are sensors that detect the amount of movement of the piston rods 8 _-1 , 8 _{-2 , . . .} , 8 _-7 .

Next, the operation of the present invention will be explained.

During rolling, the lower work roll 5 is offset in the rolling direction and the oil passages 18 are connected to the respective hydraulic chambers 17.
_-1 , 17 _-2 ... 17 _-6 is supplied with pressure oil to give a convex crown to the portion of the outer periphery of the presser roll 15 that is in contact with the divided rolls 14 _-1 , 14 _-2 ... 14 _-6 , and the fluid pressure cylinder is Support plates 10 _-1 , 9 -1 , 9 _-2 ... 9 _-7 are supplied with pressure oil to cause piston rods 8 _-1 , 8 _-2 ... 8 _-7 to individually protrude by _an arbitrary amount.
10 _-2 ...10 _-7 are moved by an arbitrary amount, and the divided rolls 14 _-1 , _{14 -2} ... 14 _-6 are held down with arbitrary strength by the support plates 10 -1 , 10 _-2 ... 10 _-7 , respectively. Press it against the roll 15 to give the presser roll 15 the desired horizontal bending.

When the desired horizontal bending is applied to the presser roll 15,
The lower work roll 5 is displaced in the horizontal direction and also in the vertical direction, changing the roll crown, so that the shape of the rolled material S can be freely controlled according to the displacement position and displacement amount. This shape control function becomes even better when a work roll bending device is also used.

In the embodiment of the present invention, a case has been described in which the shaft of the split roll is inserted into a horizontal U-shaped groove provided in the support plate and clamped on both sides. It can also be carried out by providing a shaft and inserting the shaft into the round hole, the roll that is offset and pushed by the presser roll may be used as the upper work roll, and the actuator that pushes the presser roll can be used as a wedge or screw instead of a fluid pressure cylinder. Of course, it is possible to use a European version, and various other changes can be made without departing from the gist of the present invention.

According to the multi-high rolling mill having the shape control function of the present invention, since the presser roll is provided with a hydraulic chamber corresponding to the split roll, displacement due to horizontal bending can be effectively applied to the work roll, and therefore The vertical displacement amount and deflection curve of the work roll can be set largely and freely, and as a result, the shape control function becomes even better than before.

[Brief explanation of the drawing]

Fig. 1 is an overall explanatory diagram of a multi-high rolling mill having a shape control function according to the present invention, Fig. 2 is a plan view of the shape control mechanism section of the rolling mill shown in Fig. 1, and Fig. 3 is a -
Direction arrow view, FIG. 4 is a -direction arrow view of FIG. In the figure, 3 is the upper work roll, 5 is the lower work roll, 8 _-1 , 8 _-2 ... 8 _-7 is the piston rod, 9 _-1 ,
9 _-2 ...9 _-7 is a fluid pressure cylinder, 10 _-1 , 10 _-2 ...
10 _-7 is a support plate, 14 _-1 , 14 _-2 ...14 _-6
is a split roll, 15 is a presser roll, 17 _-1 , 17
_-2 ...17 _-6 indicates the hydraulic chamber, and 18 indicates the oil path.

Claims (1)

[Scope of utility model registration request] One of the upper and lower work rolls is made smaller in diameter than the other work roll, the smaller diameter work roll is offset in the rolling direction with respect to the other work roll, and the smaller diameter work roll is made on the offset side of the smaller diameter work roll. A rolling mill in which a presser roll, a split roll, and a horizontal bending device are arranged parallel to the work roll, which has a shape control function characterized by a hydraulic chamber provided on the inner periphery of the portion of the presser roll that contacts the split roll. Multi-high rolling mill.