JPH06102204B2 - Strip width rolling mill - Google Patents

Description

TECHNICAL FIELD The present invention relates to a strip width rolling mill, and more particularly to a strip width rolling mill that rolls a slab, which is a hot rolling material, in the strip width direction.

[Conventional technology]

Conventionally, when rolling a slab in the plate width direction, the slab is horizontally passed between a pair of vertical rolls, and the slab is pressed in the plate width direction for rolling. And, even when the width reduction amount is increased, the cross-sectional shape of the outer peripheral surface of the roll is flat (flat roll) so that stable rolling is performed.
It is known that the material is changed to a concave shape (hole-shaped roll) (for example, Ironmaking Research No. 310 (1982) P295 to P306).

[Problems to be solved by the invention]

However, in the above-mentioned conventional example, since the diameter of the vertical roll is too small compared to the plate width of the slab, the contact area between the vertical roll and the slab is small, and after rolling, the edge width of the plate becomes extremely thick. The so-called dog bone shape is likely to occur and cannot be completely prevented. If the dog-bone shape occurs, there is a problem in that width-reversing development occurs during horizontal rolling in a subsequent process, and width-rolling reduction efficiency decreases. Also, if the roll diameter is small, slippage occurs between the slab and the roll when the slab bites into the roll, so it is not possible to set the width reduction amount for one pass to a large value, and a small width reduction amount can be set to several times. There was a problem that it had to be rolled separately.

By the way, it is possible to increase the roll diameter to an effective size, but if you simply increase the roll diameter,
The equipment such as the roll and the housing that supports it becomes large, which is not preferable.

An object of the present invention is to provide a width reduction rolling machine capable of setting a large width reduction amount without increasing the size of the equipment.

[Means for solving problems]

In order to achieve the above object, a strip width rolling mill of the present invention is arranged on the same plane with a predetermined gap, and a pair of cylindrical members rotatable in the plane, and a pair of cylindrical members. A drive unit that engages with the peripheral surface to rotate and drive the cylindrical member, and a support unit that engages with the inner peripheral surface of the cylindrical member to support the cylindrical member and to urge the cylindrical member in a pressing direction. It is equipped with and.

[Action]

According to the above configuration, when the driving unit rotates the pair of cylindrical members and feeds the slab between the cylindrical members, the slab is rolled in the plate width direction by the pair of cylindrical members. At this time, the rolling reaction force is received by the supporting portion via the cylindrical member.

Further, with the above configuration, the diameter of the cylindrical member can be increased without increasing the size of the support portion, the housing holding the support portion, or the like. For this reason, if the width reduction amount is set to a large value, the contact area between the slab and the cylindrical member when the slab bites into the cylindrical member becomes large, and it is possible to cause plastic deformation in a wide range at the edge of the slab. Therefore, it is possible to prevent the edge portion of the slab from having a dogbone shape.

〔Example〕

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

FIG. 1 is a plan view of a strip width rolling mill according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. In the figure, reference numeral 1 is a pair of housings arranged in the vertical direction, and separators 2 are attached to the outer peripheral surface at four positions,
The upper and lower housings 1 are rigidly coupled and a certain gap is secured between them. The lower housing 1 is firmly fixed to the base 3. A pair of work rings 4 are horizontally arranged side by side between the upper and lower housings 1, and a constant gap is secured between the pair of work rings 4. Then, the slab 5 is fed between the working rings 4. Working ring 4 is roller 6
Is supported at two positions by the drive roller 7 and is rotationally driven in the circumferential direction by the drive roller 7 abutting on the inner surface thereof. Further, both ends of the roller 6 are rotatably supported by bearings 6A and are rotatable. An input side support roller 8 and an output side support roller 9 are disposed on both sides of the drive roller 7, and both support rollers 8 and 9 are provided.
Also contacts the inner peripheral surface of the work ring 4. Drive roller 7
And the upper ends of both supporting rollers 8 and 9 are pivotally supported by one bearing box 10 via a bearing 7A, and the bearing box 10 is a reduction cylinder 11
It is connected to a ram 12 fitted therein. Reduction cylinder
Reference numeral 11 is fixed inside the upper housing 1, and hydraulic ports 11A and 11B are connected to the side wall of the housing 11. Then, when hydraulic pressure is applied to the inside of the pressure reduction cylinder 11 via the hydraulic pressure ports 11A and 11B, the ram 12 reciprocates, which causes the bearing box 10 to reciprocate. A position detector 13 is attached to the end surface of the reduction cylinder 11 so that the position of the work ring 4 can be detected.

A similar bearing box 10 is provided below the drive roller 7 and both supporting rollers 8 and 9, and the bearing box 10 is connected to a ram 12 fitted in a reduction cylinder 11.

A cylinder 14 is fixed to the end surfaces of the upper and lower housings 1, and a ram 15 is fitted in the cylinder 14.
A bearing 17 for pivotally supporting the roller 16 is fixed to the tip thereof. Then, the hydraulic port 14 attached to the side wall of the cylinder 14
When a hydraulic pressure is applied to the inside of the cylinder 14 via A and 14B, the roller 16 presses the working ring 4 to the inside.

The lower side of the drive roller 7 extends further downward through the bearing housing 10 and is connected to the shaft converter 19 via a coupling 18. The shaft converter 19 is provided with a bevel gear or the like therein and can convert the axial direction by 90 °. The other end of the shaft converter 19 is connected to an electric motor 21 via a coupling 20 having a spline.

Reference numeral 22 is a table roller that supports the slab 5 on the inlet side and the outlet side, and both ends of the table roller 22 are pivotally supported by bearings 23.

Further, in the above description, one side of the slab 5 has been mainly described, but the other side has the same configuration.

The working ring 4 constitutes a cylindrical member, the drive roller 7, the electric motor 21 and the like constitute a drive portion, and the support rollers 8 and 9, the reduction cylinder 11 and the like constitute a support portion.

Next, the operation of this embodiment will be described.

First, the width reduction amount must be set before rolling the rolled material 5. To set the width reduction amount, the position detector 13 detects the current position of the work ring 4, and based on the detection result, the hydraulic pressure applied to the hydraulic ports 11A and 11B is adjusted to adjust the ram 12 in the cylinder 11. Move. This allows the bearing box
10 moves to bring the drive roller 7 and the support rollers 8 and 9 into contact with the inner surface of the work ring 4. Then, hydraulic pressure is applied to the cylinder 14 arranged on the end surface of the housing 1 through the hydraulic ports 14A and 14B, and the inner surface of the work ring 4 is pressed by the roller 16 to position the work ring 4. In this case, the pressing force of the cylinder 14 is much smaller than the pressing force of the pressure cylinder 11, so that the drive roller 7 and the working ring 4 do not slip during idling.

Since the width reduction amount has been set as described above, rolling is next started. First, the electric motor 21 is driven, and this driving force is transmitted to the shaft converter 19 via the coupling 20, the transmission direction is converted by 90 ° by the shaft converter 19, and then transmitted to the drive roller 7 via the coupling 18. . The frictional contact between the drive roller 7 and the inner peripheral surface of the working ring 4 causes the working ring 4 to rotate in its circumferential direction. The slab 5 is provided between the pair of work rings 4.
Is inserted, the slab 5 is rolled down in the width direction and rolled. The rolling reaction force at this time is supported by the housing via the working ring 4, the driving roller 7, the supporting rollers 8 and 9, the bearing housing 10 and the ram 12.

According to this embodiment, since the support rollers 8 and 9 on the input side and the output side are arranged on both sides of the drive roller 7, the slab 5 can be fed from either the right side or the left side, so-called reverse. It can be rolled.

Further, according to the present embodiment, it has been confirmed that the working ring 4 has the same performance as that of the conventional one having the vertical roller diameters of 1000φ to 1600φ simply set to 3000φ to 5000φ. Furthermore, the maximum reduction amount per pass was 150 mm in the past, but it can be doubled to 300 mm.

The number of drive rollers 7 provided inside the work ring 4 is not limited to one, and it is preferable to use two or more drive rollers 7 in order to obtain a strong rotational force. Similarly, three or more support rollers 7 and 8 may be provided to increase the force for holding the work ring 4.

Further, it is possible to set the width reduction amount by the reduction screw instead of the reduction cylinder 11.

Further, if a device for distributing the power of the electric motor 21 is used, one electric motor 21 is sufficient.

In the embodiment described above, the transmission of the force between the drive roller 7 and the work ring 4 depends on the frictional force between the two, but as shown in FIG. 3, the external gear 7B is provided on the outer surface of the drive roller 7. In addition to forming the internal gear 4B on the inner surface of the working ring 4,
The power may be transmitted by both gears 4B, 7B. In this way, no slip is generated between the work ring 4 and the drive roller 7, and the rolling torque is transmitted more reliably.

Further, as shown in FIG. 4, by forming the groove-type caliber 4A on the outer peripheral surface of the working ring 4, the dogbone shape generated in the slab can be further reduced.

Generally, when the width reduction amount is large, the slab 5 is rolled at the time of rolling.
Buckling tends to occur. In this case, when the slab 5 is thick, as shown in FIGS. 5 and 6, buckling prevention rollers 25 are provided above and below the slab 5, and the buckling prevention roller 25 is used to press the vicinity of the central portion of the slab 5. If so, buckling of the slab 5 can be prevented. Further, when the slab 5 is thin, as shown in FIG. 7, three bridle rollers 26 are arranged on both the inlet side and the outlet side of the work ring 4 in the width direction of the slab 5 to apply tension to the slab 5. However, if the width reduction is performed, buckling of the slab 5 can be prevented.

〔The invention's effect〕

As described above, according to the present invention, a large-diameter cylindrical member can be installed without increasing the size of equipment,
It is possible to obtain a plate width rolling mill that is inexpensive and compact.

Also, by increasing the diameter of the cylindrical member, it is possible to suppress the occurrence of dogbone shapes at both edges of the slab and the occurrence of crops at the tip, and it is possible to set a large amount of width reduction. Significantly improved.

[Brief description of drawings]

FIG. 1 is a plan view of a strip width rolling mill according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIGS. 3 and 4 are sectional views showing other embodiments. 5 and 5 are plan views when the buckling prevention device is installed, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is a case where another buckling prevention device is installed. FIG. 1 ... Housing, 2 ... Separator, 4 ... Working ring, 5 ... Slab, 6,16 ... Roller, 7 ... Drive roller, 8,9 ... Support roller, 10 ... Bearing box, 11 ... … Reduction cylinder, 14… Cylinder, 19… Axis converter, 21… Electric motor, 22… Table roller.

Claims (1)

[Claims] 1. Arranged on the same plane at a predetermined interval,
A pair of cylindrical members that are rotatable in the plane, a drive unit that engages with the inner peripheral surface of the cylindrical member to rotate and drive the cylindrical member, and a cylinder that engages with the inner peripheral surface of the cylindrical member. A strip width reduction rolling mill, comprising: a support portion that supports the cylindrical member and urges the cylindrical member in a rolling direction.