JPH11239832A - Thickness reducing press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thickness reducing press performing thickness reducing while transferring a slab. SOLUTION: The thickness reducing press is equipped with dies 2 provided up and down, holding the slab 1, a slider 3 provided for each die 2 and oscillating the dies 2 up and down and back and forth and a driving device driving this slider 3. The slider 3 has a main body 5 on which circular holes 6 having their center axes in the slab width direction, have been provided and cranks 7 constructed by shifting first shafts 7a and center shafts by the first shafts engaging with these circular holes 6 and second shafts with diameters smaller than those of the first shafts, and these second shafts are rotated and driven by the driving device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thickness press device for rolling down a slab while transporting the slab.

[0002]

2. Description of the Related Art Conventionally, a rough mill has been used for rolling slabs. The slab to be rolled is a short slab of 5 m to 12 m. In order to obtain a predetermined thickness, a plurality of coarse mills are provided, or reverse rolling is performed in which the slab is moved forward and backward to perform rolling. It is also considered that a rolling press is used. FIG. 12 shows an example of a rolling press using a crank and a connecting rod. Cranks 23 are connected to dies 21 provided above and below the slab 1 via connecting rods 22.
Is connected, and the mold 21 is swung up and down to depress. The slab 1 is transported by the pinch roll 24 and the transport table 25.

[0003]

The use of long slabs by continuous casting equipment has been demanded, and there is a need to continuously transport slabs to subsequent rolling mills. In the case of rough rolling by a rough mill, there is a limit of a biting angle (about 17 °), and a thickness reduction Δt in one rolling is about 50 mm.
Since the slab is continuous, reverse rolling cannot be performed, and in order to obtain a desired thickness, it is necessary to provide a plurality of coarse mills in series, or in the case of one, to significantly increase the work roll diameter. It is difficult to manufacture such a large-diameter coarse mill in terms of design and cost. When the diameter is large, the rolling becomes slow and the cooling of the roll is difficult, so that the roll life is shortened. In addition, a rolling press using a crank and a connecting rod requires a large load on the pinch roll because the slab is drawn out with a pinch roll and transported even during rolling down.
The whole device becomes large, and there are many problems in terms of vibration and cost.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a thickness reduction press for performing thickness reduction while conveying a slab.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, the dies provided above and below the slab and the dies provided for each of the dies are moved up and down and back and forth. A swingable slider; and a driving device for driving the slider. The slider includes a main body provided with a circular hole having a central axis in a slab width direction, a first shaft fitted into the circular hole, and a A second shaft having a diameter smaller than that of the first shaft and having a crank formed by shifting the first shaft and the center axis, the second shaft being rotationally driven by the driving device;

When the second shaft rotates, the first shaft performs a cranking operation about the axis of the second shaft, and causes the main body to move up and down and back and forth by the fitted circular hole. This allows the slider to press down the mold and to apply a forward movement to the mold during the rolling down, so that the slab is subjected to the forward movement (slab flow direction) while being pressed down, so that a continuous pressing down operation is possible. .
In the first aspect of the present invention, since the slab is pressed down from both the upper and lower sides by the mold, a large amount of reduction can be given.

According to the second aspect of the present invention, there is provided a mold provided at one of the upper and lower sides of a slab, a slider for swinging the mold up and down and back and forth, a driving device for driving the slider, and a slab. A support member for supporting the slab, the support member being provided opposite to the mold and sandwiching the slider, wherein the slider has a main body provided with a circular hole having a central axis in the slab width direction, and a It has one shaft and a crank configured so that the first shaft and the central shaft are shifted by a second shaft smaller in diameter than the first shaft, and the second shaft is rotationally driven by the driving device.

According to a second aspect of the present invention, a mold is provided on one of the upper and lower sides of the slab, and a supporting material is provided on the opposite side of the mold with the slab therebetween to support the slab to be pressed down. The amount of reduction is smaller than that of the first aspect of the present invention, and the frictional force with the supporting member acts on the forward movement of the slab during the reduction, but the structure is simplified and the cost can be reduced.

According to a third aspect of the present invention, a plurality of circular holes and cranks provided in the slider according to the first or second aspect are provided in a line in the slab flow direction so that each crank generates a rolling force. It is configured.

By arranging a plurality of circular holes and cranks in a line in the slab flow direction (forward direction), the mold can be kept parallel. Further, since the rolling load can be dispersed into a plurality of parts, the structure of each crank can be simplified.

According to a fourth aspect of the present invention, a plurality of circular holes and cranks provided in the slider according to the first or second aspect are provided in a line in the slab flow direction. The crank is configured to generate a rolling force.

A single crank receives the unbalance moment of the load, and the other cranks generate only the rolling force, so that the press can be efficiently performed as a whole.

According to the fifth aspect of the present invention, the slab is transported by a pinch roll or a table, and when the slider is pressed down, the slab is transported in accordance with the forward moving speed of the slider.

When the slab is lowered by the slider, the slab is conveyed in accordance with the advance speed of the slider, and otherwise, the slab is conveyed at an appropriate speed, for example, a speed according to a succeeding device, so that the slab is appropriately lowered and continuously moved. Transported

According to a sixth aspect of the present invention, the distance L over which the slab moves in one cycle of the thickness reduction period and the normal transport speed period is not longer than the length L1 of the mold in the slab flow direction.

Since the moving distance L of the slab 1 conveyed in one cycle is not longer than the length L1 of the mold in the slab flow direction, the reduction length in the next cycle is slightly different from the length reduced in the previous cycle. I will wrap. Thereby, thickness reduction can be performed reliably.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a configuration of a thickness reduction press according to a first embodiment, and FIG.
It is -X sectional drawing. A mold 2 is provided above and below the slab 1. Cooling water is supplied into the mold 2 to cool it. Note that cooling water may be applied from outside.
The mold 2 is detachably attached to the slider 3 via the mold receiver 4. The slider 3 includes a main body 5 and a crank 7. The main body 5 is provided with two circular holes 6 in a line in the slab flow direction (forward direction) with the axial direction thereof being the slab width direction. As shown in FIG. 2, the crank 7 has a first shaft 7a fitted into the circular hole 6 via a first bearing 8a,
It comprises a second shaft 7b which is smaller in diameter than the shaft 7a and whose center axes are shifted from each other and which are coupled to both ends. One of the second shafts 7b is connected to a rotary drive (not shown). The second shafts 7b of the upper and lower sliders 3 are supported by a common frame 9 via a second bearing 8b. A pinch roll 12 is provided on the downstream side of the mold 2 to control the conveying speed of the slab 1. A table roller 13 is provided on the entrance side or exit side of the pinch roll 12, and conveys a rolled material. In FIG. 2, A represents the first axis, and B represents the second axis.

FIG. 3 shows the structure of the slider.
Since the slider is somewhat schematically shown in FIGS. 1 and 2, a specific example is shown, and the upper half of the slab 1 is shown. A mold 2 for pressing down the slab 1 is attached to a main body 5 by a mold receiver 4. The main body 5 is provided with two circular holes 6 in a line in the conveying direction of the slab 1. The crank 7 includes a first shaft 7a and thinner second shafts 7b provided on both sides of the first shaft 7a. The first shaft 7a is supported by a first bearing 8a,
The second shaft is supported by a second bearing 8b. The circular hole 6 is the first
It shows the inner surface of the bearing 8a. A indicates the axis of the first axis, B indicates the axis of the second axis, and rotates about B.

Next, the operation will be described. FIG. 4 shows the operation of the slider 3 in one cycle, and FIG. 5 shows the slab speed during one cycle. FIG. 6 shows the operation of the slider 3 and the slab 1 in one cycle. In FIG. 4, 1
The cycle moves from t1 to t2 to t3 to t4 to t1, and t1
The rolling down is performed in a period from ta to tb with 2 interposed therebetween. In FIG. 5, the transport speed of the slab 1 is controlled by a pinch roll 12. During the rolling down, the slab 1 is transported in accordance with the forward speed of the slider 3, and otherwise the normal transport speed. The normal transport speed is selected so that the slab moving distance L in one cycle is not longer than the rolling length L1 of the mold 2 shown in FIG. 1, and a speed suitable for a downstream device is selected. With such a moving distance L, the reduction length of the previous cycle slightly overlaps with the reduction length of the next cycle, and appropriate reduction is performed.

In FIG. 6, t1 to t4 correspond to t1 to t4 in FIGS. At t1, the slider 3
It rises in the middle upward, and is at the position that has been moved most backward. At t2, the roll-down state is shown, and it is at an intermediate position in the front-back direction. At t3, it is upwardly intermediately and at the most advanced position in the front-rear direction. At t4, it is at the highest position and at the middle position in the front-back direction. The slider 3 is thus t1 to t2 to t3
Is moving forward as shown by the arrow, and the time t2 at the time of rolling down is reduced.
Maximum speed around. Therefore, this slider 3
The slab 1 is transported by the pinch rolls 12 at the same speed as that of the above, so that the slab 1 can be continuously transported even at the time of rolling down at the optimum speed for rolling down.

Next, a second embodiment will be described. In this embodiment, a slider is provided with a balancer for absorbing the eye balance moment. FIG. 7 is a side view of the second embodiment, showing the upper half of a vertically symmetric structure, and FIG.
FIG. 9 is a sectional view taken along the line YY in FIG. 7. As shown in FIG. 7, the slider 3 is constituted by one large crank 7, and has a structure in which an unbalance moment due to a load is absorbed by the balancer 14 using the crank 17.

As shown in FIGS. 7 and 8, a mold 2 is provided with a slab 1 interposed therebetween. The mold 2 is detachably attached to a main body 5 by a mold receiver 4. Crank 7 is the first
A shaft 7a and a second shaft 7b are coupled to both ends of the shaft 7a with their axes shifted. The first shaft 7a is supported by a first bearing 8a provided on the main body 5, and the second shaft 7b is supported by a second bearing 8b provided on the frame 9 shown in FIGS. A indicates the first axis, and B indicates the second axis. A gear coupling 16 is provided at the tip of one second shaft 7b, and the second shaft 7b is rotated by a driving device (not shown).

As shown in FIG. 7 and FIG.
Has a crank 17, and the crank 17 is a first shaft 17a.
And a second shaft 17b provided at both ends thereof and having a smaller diameter than the first shaft 17a. The axis a of the first shaft and the axis b of the second shaft are eccentric. The first shaft 7a is supported by a first bearing 8a, and the first bearing 8a is fixed by an outer peripheral ring 19. The second shaft 7b is supported by a second bearing 8b, and the second bearing 8b is fixed to the support structure 15. The support structure 15 is attached to the main body 5 with bolts. The second of the other
A gear coupling 16 is provided at the tip of the shaft 7b,
It is driven by a driving device (not shown). Note that a indicates the axis of the first shaft 17a, and b indicates the axis of the second shaft 17b.

Next, the operation will be described. Slider 3
Of the slab 1 is the same as that of the first embodiment. However, since there is one upper and lower crank 7, an unbalance moment is generated due to the reaction force when the slab 1 is pressed down. The balancer 14 works to cancel this unbalanced moment.

Next, a third embodiment will be described. FIG. 10 is a longitudinal sectional view showing the configuration of the thickness reduction press according to the third embodiment, and FIG. 11 is a sectional view taken along line XX of FIG. 1 and 2 have the same function. In this embodiment, one of the upper and lower sides of the slab 1 is provided with the mold 2 and the slider 3, but the support member 10 is provided on the side facing the mold 2 with the slab 1 interposed therebetween. Do. The pressing operation and the back-and-forth operation by the slider 3 are performed in the same manner as in the first embodiment shown in FIG. 6, but the amount of reduction in thickness due to the pressing is reduced. Further, in the forward movement at the time of the rolling, the conveyance force is generated by the frictional force generated between the slab 1 and the support member 10, so that the driving device of the slider 3 and the pinch roll 1
2 is burdensome. However, the structure is simplified and the production costs are reduced.

[0026]

As is apparent from the above description, according to the present invention, the slab can be transported while the slab is being lowered by providing the die and the slider which moves down and forwards the rolling, thereby enabling continuous rolling operation. It can be implemented in a practical manner. By providing a plurality of cranks, the mold can be kept parallel. Further, it is also possible to provide a crank for reduction and a crank for balance to keep the mold parallel. The internal and external cooling of the mold can be facilitated, and the life of the mold can be extended. It is also possible to reduce the thickness by 50 mm or more under one pressure. Further, the whole apparatus can be made compact.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a diagram showing a specific structure of a slider.

FIG. 4 is a diagram showing one cycle of operation of a slider.

FIG. 5 is a diagram showing a moving speed of one cycle of a slab.

FIG. 6 is a diagram showing one cycle of operation of a slider and a slab.

FIG. 7 is a diagram showing a configuration of a second embodiment of the present invention.

FIG. 8 is a sectional view taken along line XX of FIG. 7;

FIG. 9 is a sectional view taken along line YY of FIG. 7;

FIG. 10 is a diagram showing a configuration of a third embodiment of the present invention.

FIG. 11 is a sectional view taken along line XX of FIG. 10;

FIG. 12 shows a rolling press using a crank and a con-lot.

[Explanation of symbols]

 Reference Signs List 1 slab 2 mold 3 slider 4 mold receiver 5 body 6 circular hole 7 crank 7a first shaft 7b second shaft 8 bearing 8a first bearing 8b second bearing 9 frame 10 support material 12 pinch roll 13 table roller 14 balancer 15 Support structure 16 Gear coupling 17 Crank 17a First shaft 17b Second shaft 18a First bearing 18b Second bearing 19 Outer ring

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B21J 9/18 B21J 9/18 (72) Inventor Kenichi Ide 1 Shinnakaharacho Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima-Harima Heavy Industries, Ltd. Inside the Yokohama Engineering Center (72) Inventor Yasushi Dodo Ishikawashima Harima Heavy Industries Ltd. No. 1-2 Nihon Kokan Co., Ltd. (72) Inventor Shozo Ikemune 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Hayato Murata Marunouchi, Chiyoda-ku, Tokyo 1-2-1 Nihon Kokan Co., Ltd.

Claims (6)

[Claims] 1. A mold provided vertically above and below a slab, a slider provided for each mold and swinging the mold up and down and back and forth, and a driving device for driving the slider. The slider has a main body provided with a circular hole having a central axis in the width direction of the slab, a first axis fitted in the circular hole, and a first axis shifted from the central axis by a second axis smaller in diameter than the first axis. A thickness reduction press, wherein the second shaft is rotatably driven by the driving device. 2. A mold provided on one of upper and lower sides of a slab, a slider for swinging the mold up and down and back and forth, a driving device for driving the slider, and the mold for sandwiching the slab. A supporting member provided to face the slab and supporting the slab. The slider includes a main body provided with a circular hole having a central axis in the slab width direction, a first shaft fitted into the circular hole, and a A thickness reduction press, comprising: a second shaft having a smaller diameter than a single shaft, the crank having a center axis shifted from the first shaft, wherein the second shaft is rotationally driven by the driving device. 3. A plurality of circular holes and cranks provided in the slider are provided in a line in the slab flow direction.
The thickness reduction press according to claim 1 or 2, wherein each crank is configured to generate a reduction force. 4. A plurality of circular holes and cranks provided in the slider are provided in a line in the slab flow direction,
3. The thickness reduction press according to claim 1, wherein one crank receives a load moment and the other crank generates a reduction force. 5. The thickness reduction press according to claim 1, wherein the slab is transported by a pinch roll or a table, and the slab is transported in accordance with a forward moving speed of the slider when the slider is pressed down. . 6. The method according to claim 1, wherein a distance L in which the slab moves in one cycle including a thickness reduction period and a normal conveyance speed period is not longer than a length L1 of the mold in the slab flow direction. 2. The thickness reduction press according to 2.