JPS58141802A - Rolling mill - Google Patents

Abstract

PURPOSE:To extend the life of flexible hoses and liquid pressure devices by bringing the journal boxes of work rolls into contact with freely vertically movable beams and providing moving devices for the work rolls in their axial line directions and the liquid pressure devices for applying roll bending in the required positions. CONSTITUTION:Upper, lower work rolls 7, 8 are moved together with upper, lower work roll bearings 9, 9', 10, 10' in their axial line directions with pinions and racks in the stage of rolling. Since the journal boxes 9, 9', 10, 10' slide on the contact surfaces with upper, lower beams 11, 12 in this stage, liquid pressure pistons 13 are kept free from the forces in the transverse directions. The rolls 7, 8 are moved to the required positions, thereafter the pistons 13 are operated to move the roll 7 upward with the beams 11 and the journal boxes 9, 9' until the roll contacts tightly with an upper backup roll 3 to set the rolls 7, 8 at a prescribed space, then the rolling is started. If necessary, the pistons 13 are operated to apply bending to the rolls 7, 8 with the beams 11, 12, the boxes 9, 9', 10, 10', thereby controlling the shape of the plate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling mill capable of moving work rolls in the axial direction, which is capable of supporting a large #i weight and reducing damage to flexible hoses and hydraulic equipment. .

A rolling mill in which the L-shaped work rolls can be moved in the axial direction is known, for example, as shown in Japanese Patent Publication No. 5G-12385. There is one in which a frame is provided, a hydraulic device is provided on the movable frame, and the work roll is suspended by the hydraulic device.

However, in such a rolling mill, since the movable frame moves a large amount in the roll axis direction, the length of the flexible hose that supplies pressurized fluid to the hydraulic device becomes long, and the flexible hose moves violently, making it easy to be damaged. Also, is the structure of the movable frame unstable? There are various problems such as the pressure device being easily damaged and the central member of the guide frame having an E-shaped cross section being vulnerable to the roll pending load, which may result in damage.

The present invention makes it possible to transmit the pressing load of the work roll against the backing roll through the beam and the roll axle box by bringing the roll axle box that supports the work roll into contact with a beam that can be raised and lowered, and also to align the work roll with the roll axis. The present invention relates to a rolling mill that is capable of moving in different directions and applying roll pending to work rolls, capable of supporting a large load, and capable of extending the life of flexible hoses and hydraulic devices.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Housing window 2-E provided in rolling mill housing 1
On the other hand, an upper backing roll shaft box 4, which rotatably supports the upper backing roll 3, is fitted to be able to move up and down, and a lower backing roll 5, which rotatably supports the upper backing roll 5, is fitted to the lower blade of the housing window 2. The axle box 6 is fitted so that it can be moved up and down.

-L F Upper and lower work rolls 7°8 are arranged between the backing rolls 3 and 5, and an upper work roll shaft box 9 is provided on both sides of the shaft of the upper work roll 7.
, 9', and lower work roll shaft boxes 10 and 10 are installed on both sides of the lower work roll 8 shaft.

An upper beam 11 and a lower beam 12 extending in the roll axis direction are disposed in the housing window 21 so as to be able to rise and fall freely, and a hydraulic piston 13 is installed between the L lower beams 11 and 12, and the upper work roll shaft boxes 9 and 9' are placed on the upper beam 11, and one work roll shaft box 10°lO' is fitted into the groove of the lower beam 12.

Arms 9a and log extending in the roll axis direction are physically fixed to the upper and lower work roll shaft boxes 9 and 10 on the working side, and the arms 9m and 10a are made to protrude toward the outside of the rolling mill. Work roll shaft box9. Long racks 14 and 15 are fixed to both sides of lO and arms 9a and 10a in the direction of the roll axis.

A binion 16.17, which is matched with the rack 14.15, is pivotally connected to the upper and lower beams 11.12 via vertical pins 18.19, and a binion 20 is attached via vertical pins 22 and 23.
. .8 can be moved in the axial direction.

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

During rolling, binions 20.16.21, 17,
Upper and lower work roll shaft box 9°10 through rack 14.15
At the same time, the upper and lower work rolls 7.8 are moved in the axial direction.

During this movement, the upper and lower work roll axle boxes j and 1o also move in the roll axis direction together with the upper and lower work rolls 7.8, and the upper and lower work roll axle boxes 9. d.

10.10 drives the contact surfaces of the upper and lower beams 11 and 12, so no lateral force acts on the hydraulic piston 13. The upper and lower work rolls 7°8 in Figure M1 indicate the positions for rolling the maximum sheet width, and for narrower sheet widths, the upper work roll 7 is located on the left side of the illustrated position in Figure 3. The lower work roll 8 is located on the right side.

Once the work opening luer 8 has been moved to the required position in the roll axis direction, the upper holding roll 3 is raised or lowered to a predetermined position via the upper holding roll shaft box 4 using a lowering screw (not shown) or the like. By operating the hydraulic piston 13 to raise the upper beam 11, the upper work roll shaft box 9 is also raised, and the upper work roll 7 is moved up to the upper backing roll 3.
The L lower work rolls 7.8 are brought into close contact with each other, and rolling is started while maintaining the interval between the L lower work rolls 7.8 at a predetermined state. The reaction force when the hydraulic piston 13 is activated is the lower bee 612. F work roll shaft box 1O, XO
1 is transmitted from the lower work roll 8 to the lower backing roll 5.

When applying roll bending to the upper and lower work rolls 7.8 during rolling, the hydraulic piston 13 is actuated, and the upper and lower beams 11.12, upper and lower work roll shaft boxes 9. d,xo,t
Applying bending to the upper and lower work rolls 78 via o,
Controls the shape of the plate.

In addition, in the embodiment of the present invention, a case has been described in which the hydraulic piston is disposed between the upper and lower beams, but it is also possible to provide a protrusion integrally fixed to the rolling mill housing between the upper and lower beams.
A hydraulic piston for the upper work roll may be provided between the upper surface of the protrusion and the lower surface of the upper beam, and a hydraulic piston for the lower work roll may be provided between the lower surface of the protrusion and the upper surface of the lower beam;
Is it possible to move the upper and lower work rolls in the axial direction by using a hydraulic cylinder I instead of the rack and pinion, and within the scope of the invention? Of course, various changes can be made.

Since the rolling mill of the present invention has the above-described configuration, it can achieve various excellent effects as described in )'.

(1) Since the beam is provided, it is possible to strongly support the load, improving the stability of the rolling mill.

(It) Since no lateral force acts on the fi pressure piston, damage to it can be prevented.

Since the 0-hydraulic piston does not move in the roll axis direction, the flexible hose can be short and does not move much, so the flexible hose has less wear and tear and has a longer life.

[Brief explanation of the drawing]

Figure 1 is a front view of the rolling mill of the present invention, Figure 2 is ・w41
Figure 1-1 is a directional view, Figure 3 is a plan view of the upper work roll in Figure 1, Figure 4 is a plan view of the lower work roll, and Figure 5 is a view of the present invention. A front view of a device for shifting work rolls used in a rolling mill, Figure 1g6 is Vt- in Figure 5.
A V+ direction arrow view is shown. In the figure, 1 is the pressure value machine housing, 3 is the upper support roll, 5 is the lower support roll, 7 is the upper work roll, 8 is the lower work roll, 9, 9
' is the upper work roll shaft box, 1o, 1° is the lower work roll shaft box, 11 is the upper beam, 12 is the lower beam, 13 is the hydraulic piston, row 15 is the rack, 16, 17, 20, 21 are the binions. show. Patent originator

Claims (1)

[Claims] l) A roll axle box that pivotally supports a work roll is brought into contact with a beam that can be raised and lowered, so that the pressing force of the work roll against a backing roll can be transmitted through the beam and the roll axle box, and the work roll is A rolling mill characterized in that a device for moving the work rolls in the axial direction and a hydraulic device for imparting roll balance or roll pending to the work rolls are arranged at required positions.