JPH09267119A - Cooling bed of bar rolling equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take sufficient cooling time for the small-product size of bar steel and to contrive stable transfer for large-product size of bar steel by constituting grooves for bar steel which are formed on fixed rakes and movable rakes of the main body of a cooling bed of large grooves and small grooves. SOLUTION: The large grooves 14A, 15A and small grooves 14B, 15B are formed on each rake 14, 15. When the small-product size of bar steel such as steel bars is transferred, it is possible to receive the bar steel in both the large groove 14A and small groove 14B of the fixed rake, transfer pitch is prolonged twice the case that the small groove 14B is not provided, as a result, long cooling time is taken. On the other hand, when the large-product size of bar steel such as shapes is transferred, stable transfer is executed by receiving the bar steel as it is in the large groove 14A having sufficient length of the fixed rake 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling floor in a strip rolling mill, and in particular, a groove for a strip formed in a fixed rake and a movable rake of a cooling floor body is constituted by a large groove and a small groove, and has a small size such as a steel bar. For these steel strips, both grooves can be used for a sufficient cooling time, while for large steel strips such as shaped steel, large grooves can be used for stable transfer. The present invention relates to a cooling bed in a steel strip rolling facility capable of achieving the above.

[0002]

2. Description of the Related Art As shown in FIG. 7, various types of bar steel 1 such as bar steel, shaped steel and flat steel are generally rolled by a rolling mill train and then cut by a cutting machine 2 installed downstream of the rolling mill train. It is cut into a predetermined length by, and is carried into the cooling floor 3 and cooled.

The cooling floor 3 has a cooling floor body 4 for straightening and cooling the steel strip 1 cut into a predetermined length by a cutting machine 2, and a cooling floor body 4 provided on the inlet side of the cooling floor body 4. Device (run-in device) for loading steel strip 1 into
5 and the cooling floor body 4 provided on the exit side of the cooling floor body 4
It comprises a carry-out device (runout device) 6 for carrying out the steel strip 1 cooled to a predetermined temperature in the process of being transferred from the cooling floor main body 4 to the next step.

In the run-in table, the carry-in device 5 has, as shown in FIG. 8, a braking plate 5A that can move up and down one by one to transfer the steel bars 1 to a fixed lake described later. . The straightening of the steel strip 1 is performed by the straightening floor 4A of the cooling steel strip main body 4 on the side where the steel strip enters.

In the cooling floor main body 4, a plurality of fixed rakes (fixed comb teeth) 7 and a plurality of movable rakes (movable comb teeth) 8 are parallel to each other in a direction orthogonal to the conveying direction of the steel strip 1 and alternately. It consists of the ones arranged. Here, the conveyance direction of the steel strip 1 means the moving direction of the steel strip 1 from the rolling mill train to the carry-in device 5.

As shown in FIG. 9, the fixed rake 7 and the movable rake 8 are formed with chevron-shaped teeth 7B and 8B for forming grooves 7A and 8A into which the steel strip 1 is inserted at a predetermined pitch. The movable rake 8 circularly moves about a horizontal axis orthogonal to the longitudinal direction of the rake, so that the steel bar in the groove 7A of the fixed rake 7 is intermittently introduced into the cooling floor main body 4 at every pitch of the groove 7A. To the exit side.

According to the conventional cooling floor having such a structure, the steel strip is cooled as follows. That is,
Strip 1 rolled by the rolling mill train (for example, steel bar)
After being cut into a predetermined length by the cutting machine 2, as shown in FIG. 8, the braking plate 5A of the carry-in device 5 is lifted to roll into the first groove 7A1 of the fixed rake 7. In this way, the steel strip 1 carried into the cooling floor main body 4 is intermittently transferred onto the cooling floor main body 4 by the movable rake 8 and naturally cooled in the process. The rolled steel strip 1 transferred to the outlet side of the cooling floor body 4 is sequentially transported to the next step by the unloading device 6.

[0008]

However, the above-mentioned conventional cooling bed has the following problems. That is, since a small-sized steel bar such as a steel bar 1A has a high rolling speed and a fast carry-in pitch to the cooling floor 3, such a small-sized steel bar needs to have a sufficiently long cooling time in the cooling floor 3. There is. Therefore, as shown in FIG. 10A, the grooves 7A, 8 of the fixed rake 7 and the movable rake 8 are formed.
If the pitch of A is made small, the cooling time of small-sized bar steel can be made longer, but as shown in FIG.
Since the length of the inclined side (L) of B and 8B is shortened, shaped steel 1B
Stable transfer of large-sized steel bars such as As a result, the bar size is limited.

On the other hand, since it is necessary to stably transfer a large-sized steel bar such as the shaped steel 1B, such a large-sized steel bar has a groove 7A as shown in FIG. 11B. , 8A needs to be increased in pitch. However, the grooves 7A, 8A of the fixed rake 7 and the movable rake 8
If the pitch is increased, the length of the inclined side (L) of the teeth 7B, 8B becomes longer, so that stable transfer of large-sized bar steel can be achieved, but as shown in FIG. The cooling time of the size steel bar cannot be taken long enough.

Therefore, an object of the present invention is to allow a sufficient cooling time for a small-sized bar steel such as a steel bar, and a stable transfer for a large-sized bar steel such as a shaped steel. It is to provide a cooling bed in a strip rolling equipment capable of achieving the above.

[0011]

According to the first aspect of the present invention,
After rolling, the strip is cut into a predetermined length, and the strip is carried into the cooling floor body for straightening and cooling the strip that is conveyed and the cooling floor body provided on the inlet side of the cooling floor body. And a carry-out device provided on the exit side of the cooling floor main body for carrying out the bar steel from the cooling floor main body, wherein the cooling floor main body has a plurality of fixed lakes and a plurality of fixed lakes. And the movable rake are arranged in parallel and alternately in a direction orthogonal to the conveying direction of the steel strip, and the fixed rake and the movable rake have a mountain shape for forming a groove into which the steel strip enters. Teeth are formed at a predetermined pitch, and the movable rake performs a circular motion about a horizontal axis that is orthogonal to the rake longitudinal direction,
In the cooling floor in the steel strip rolling facility, the groove in the groove of the fixed rake is intermittently transferred from the inlet side to the outlet side of the cooling floor body, and the groove is a large groove formed by the teeth. , A small groove formed by cutting out a part of an inclined side of the tooth on the downstream side in the transport direction of the steel strip.

According to a second aspect of the present invention, the carry-in device is
It is characterized in that it comprises a run-in trough for carrying a small-sized bar steel such as a steel bar into the cooling floor body.

According to a third aspect of the present invention, the carrying-in device is
Of the run-in trough for carrying in small-sized bar steel such as steel bars into the cooling floor body, and the run-in table for carrying in small-sized bar steel bars and large-sized bar steel such as shaped steel into the cooling floor body Of at least the run-in table, and an elevating plate for forming a tip groove into which the small-sized steel bar enters is provided on the inlet side of the cooling floor body. .

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a cooling floor in a strip rolling mill of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing an embodiment of a cooling floor in the present invention, a strip rolling mill. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a front view showing a fixed rake and a movable rake in a cooling floor in the present invention, a strip rolling mill, and FIG. 3 (A) is a front view showing a state where a steel bar is being transferred. B) is a front view showing a state where the shaped steel is being transferred.

FIG. 4 is a schematic front view showing a state in which the steel bars are carried into the cooling floor and transferred using the run-in trough. FIG. 4A shows the steel bars dropped from the run-in trough onto the fixed rake. FIG. 3B is a schematic front view showing a state where the steel bar on the fixed rake is transferred by the movable rake.

FIG. 5 is a schematic front view showing a state in which steel bars are carried in and transferred to a cooling floor using a run-in table, and FIG. 5 (A) shows a braking plate to a lifting plate of the run-in table. FIG. 4B is a schematic front view showing a state in which the steel bar has rolled into the large groove of the fixed rake via, and FIG. 3B shows the braking plate of the run-in table in the tip groove formed by the lowering of the elevating plate. It is a schematic front view which shows the state which the steel bar rolled down from, and the same figure (C) is a schematic front view which shows the state which transferred the steel bar on a raising / lowering plate and a fixed rake by a movable rake.

FIG. 6 is a schematic front view showing a state in which the shaped steel is carried into the cooling floor by using the run-in table and is transferred, and FIG. 6 (A) is an elevation from the braking plate of the run-in table. It is a schematic front view showing a state in which the shaped steel has slid down into the large groove of the fixed lake through the plate, and FIG. 6B is a schematic front view showing a state where the shaped steel on the fixed lake is transferred by the movable rake. Is.

In FIG. 1 to FIG. 3, reference numeral 9 denotes a cooling floor main body for straightening and cooling the rolled steel which is cut into a predetermined length after rolling and is conveyed. A strip steel straightening floor 9A is provided. Reference numeral 10 denotes a carry-in device, which is provided on the entrance side of the cooling floor body 9, for carrying the bar steel into the cooling floor body 9. The carry-in device 10 includes a run-in trough 11 and a run-in table 12.
An unloading device (not shown) for unloading the rolled steel strip from the cooling floor body 9 is provided on the exit side of the cooling floor body 9. Reference numeral 13 is an elevating plate provided between the inlet side of the cooling floor body 9 and the run-in table 12 for forming the tip groove 13A.

The cooling floor body 9 includes a plurality of fixed lakes 14.
And a plurality of movable rakes 15 are arranged in parallel and alternately in a direction orthogonal to the conveyance direction of the steel strip. The fixed rake 14 has a large groove 14A and a small groove 1
The mountain-shaped teeth 14C for forming 4B are formed at a predetermined pitch. Similarly for the movable lake 15, the large groove 15
A-shaped teeth 15C for forming A and the small groove 15B
Are formed at a predetermined pitch. The movable rake 15 performs a circular movement around a horizontal axis that is orthogonal to the longitudinal direction of the rake, so that the large groove 14A and the small groove 14B of the fixed rake 14 are moved.
The steel strip inside is intermittently transferred from the inlet side to the outlet side of the cooling floor main body 9.

The small grooves 14B and 15B of the fixed rake 14 and the movable rake 15 are formed by notching the central portions of the inclined sides (L) of the teeth 14C and 15C on the downstream side in the direction of conveyance of the bar steel in a V shape. ing. Small groove 14
It is needless to say that the shapes of B and 15B may be other shapes such as trapezoidal shape or semi-circular shape, which are capable of accepting the bar steel, other than the V-shape.

In this way, the large groove 1 is formed in each lake 14, 15.
4A, 15A and the small grooves 14B, 15B are formed, when a small-sized bar steel such as a steel bar 1A is transferred, as shown in FIG. 3A, both the large groove 14A and the small groove 14B of the fixed lake 14 are formed. Since the steel bar 1A can be received in the above, the transfer pitch becomes twice as long as in the case where the small groove 14B is not provided, and the cooling time can be lengthened accordingly.

On the other hand, when transferring a large-sized bar steel such as the shaped steel 1B, as shown in FIG. 3 (B), the bar steel is fixed as it is to the large groove 14A of the lake 14 having a sufficient length.
It can be received and stably transferred.

The run-in trough 11 is, for example, for carrying the steel bar 1A cut into a predetermined length after being rolled at a high speed into the cooling floor main body 9, and as shown in FIG.
The steel bar 1A is attached to the first to fourth gutter-shaped receiving members attached to the tips of the first to fourth rocking arms 16, and the first and third receiving members 17A and the second and fourth receiving members 17A are used. Alternately distributed to the receiving member 17B, and the pair of receiving members 1
7A and 17B are alternately lowered to allow a plurality of (two in this example) steel bars 1A at a time to pass from the chute 18 through the guide slits 19 and the above-mentioned tip groove 13A and the first large groove 14A1 of the fixed rake 14. It is intended to drop at the same time.

The run-in table 12 is shown in FIGS.
As shown in FIG. 1, the inclined table roller 20 and the braking plate 21 provided between the table rollers 20 are provided, and the bar steel conveyed by the table roller 20 is transferred to the braking plate 21 and the elevating plate 1.
It is transferred to the fixed rake 14 by moving up and down 3.

Next, a case where the steel bar 1A is carried into the cooling floor and cooled by using the run-in trough 11 will be described with reference to FIG. As shown in FIG. 4 (A), one of the two steel bars 1A simultaneously falling from the slit 19 of the run-in trough 11 falls into the tip groove 13A formed by the lowering of the elevating plate 13, and the other one. One drops into the first large groove 14A1 of the fixed rake 14.

In this way, when the two steel bars 1A are received in the tip groove 13A formed by the lowering of the elevating plate 13 and the first large groove 14A1 of the fixed rake 14, as shown in FIG. The movable rake 15 is actuated, and the two steel bars 1A are intermittently transferred to the carry-out device along the fixed rake 14 at the same time.

When the run-in trough 11 is used, if the slit 19 for guiding the steel bar 1A is located directly above the large groove 14A and the small groove 14B of the fixed rake 14, the steel bar 1A can be easily made into the large groove 14A and the small groove. 14B
The elevating plate 13 is not always necessary because it falls inside.

Next, FIG. 5 shows a case where the steel bar 1A is carried into the cooling floor by using the run-in table 12 and cooled.
This will be described with reference to FIG. As shown in FIG. 5 (A), a steel bar 1A conveyed by the run-in table 12
Is moved from the ascending braking plate 21 through the ascending / descending plate 13 ascended to the upper limit position to the fixed rake 14
Rolling into the first large groove 14A1.

Then, as shown in FIG. 5 (B), the elevating plate 13 descends at the same time when the braking plate 21 reaches the lower limit position to form a tip groove 13A.
Then, the braking plate 21 rises and the second steel bar 1A rolls into the tip groove 13A.

In this way, when the two steel bars 1A are received in the tip groove 13A formed by the lowering of the elevating plate 13 and the first large groove 14A1 of the fixed rake 14, as shown in FIG. 5 (C). The movable rake 14 operates, and the steel bar 1A is intermittently transferred to the unloading device along the fixed rake 14. During this time, the lifting plate 13
Ascending, and the braking plate 21 descends in preparation for receiving the next steel bar 1A.

As described above, when a small-sized bar steel such as a steel bar 1A is carried into the cooling floor using the run-in table 12 and cooled, the small groove 1 formed in the large groove 14A is used.
Since it is difficult to insert the steel strip into the 4B, in this case, the lifting plate 13 for forming the tip groove 13A.
Becomes indispensable.

Next, the case where the shaped steel 1B is carried into the cooling floor and cooled by using the run-in table 12 is shown in FIG.
This will be described with reference to FIG. As shown in FIG. 6 (A), the section steel 1B conveyed by the run-in table 12
Is lifted by the braking plate 21,
Lifting plate 13 held in advance at the upper limit position
And slides into the first large groove 14A1 of the fixed lake 14.

In this way, the shaped steel 1B is fixed to the fixed rake 1.
4 is received in the first large groove 14A1 of FIG.
As shown in (B), the movable rake 14 operates, and the shaped steel 1B is intermittently transferred to the unloading device along the fixed rake 14. During this time, the braking plate 21 descends and prepares for the next section steel 1B.

[0035]

As described above, according to the present invention, the groove for the steel strip formed in the fixed rake and the movable rake of the cooling floor main body is composed of the large groove and the small groove, and is made into a small-sized steel strip such as a steel bar. On the other hand, by using these both grooves, a sufficient cooling time can be taken, while
For large-sized bar steel such as shaped steel, the use of the large groove brings about an industrially useful effect such that stable transfer can be achieved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a cooling floor in a steel strip rolling facility according to the present invention.

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

FIG. 3 is a front view showing a fixed rake and a movable rake in a cooling floor in the present invention, a steel strip rolling facility, and FIG. 3 (A) is a front view showing a state where a steel bar is being transferred. B) is a front view showing a state where the shaped steel is being transferred.

FIG. 4 is a schematic front view showing a state in which steel bars are carried in and transferred to a cooling floor using a run-in trough, and FIG.
[Fig. 3] is a schematic front view showing a state where steel bar is dropped from a run-in trough onto a fixed rake, and Fig. 6B is a schematic front view showing a state where steel bar on a fixed rake is transferred by a movable rake.

FIG. 5 is a schematic front view showing a state in which a steel bar is carried in and transferred to a cooling floor using a run-in table, and FIG. 5 (A) is a view from a braking plate of the run-in table through an elevating plate. It is a schematic front view which shows the state in which the steel bar rolled down in the large groove of a fixed rake, and the same figure (B).
FIG. 4C is a schematic front view showing a state in which the steel bar has rolled down from the braking plate of the run-in table into the tip groove formed by the lowering of the elevating plate, and FIG. It is a schematic front view which shows the state which transferred the steel bar on a fixed rake.

FIG. 6 is a schematic front view showing a state in which the shaped steel is carried in and transferred to the cooling floor using the run-in table, and FIG. 6 (A) is a diagram showing that the braking plate of the run-in table is passed through the lifting plate. FIG. 2B is a schematic front view showing a state in which the vertical section steel slides down into the large groove of the fixed lake, and FIG.
It is a schematic front view which shows the state which transferred the shaped steel on a fixed rake by a movable rake.

FIG. 7 is a schematic plan view showing a process in which a steel strip carried into a cooling floor is carried out after cooling.

FIG. 8 is an explanatory diagram of a braking plate in a conventional cooling floor.

FIG. 9 is a front view showing a fixed rake and a movable rake in a conventional cooling floor.

FIG. 10 is a front view showing a fixed rake and a movable rake with a small groove pitch, FIG. 10 (A) is a front view showing a state where a steel bar is being transferred, and FIG. 10 (B) is a shaped steel. It is a front view which shows the state which is transferring.

FIG. 11 is a front view showing a fixed rake and a movable rake having a large groove pitch, FIG. 11 (A) is a front view showing a state where a steel bar is being transferred, and FIG. 11 (B) is a shaped steel. It is a front view which shows the state which is transferring.

[Explanation of symbols]

 1: Steel bar 1A: Steel bar 1B: Shaped steel 2: Cutting machine 3: Cooling floor 4: Cooling floor body 4A: Straightening floor 5: Carrying device 5A: Braking plate 6: Carrying out device 7: Fixed lake 7A: Groove 7A1: No. 1 groove 7B: tooth 8: movable lake 8A: groove 8B: tooth 9: cooling floor body 9A: straightening floor 10: loading device 11: run-in trough 12: run-in table 13: lifting plate 13A: tip groove 14: fixed lake 14A: Large groove 14B: Small groove 14C: Tooth 14A1: First large groove 15: Movable rake 15A: Large groove 15B: Small groove 15C: Tooth 16: Swing arm 17A: First and third receiving member 17B: Second and fourth receiving member 18: Shoot 19: Slit 20: Table roller 21: Braking plate

Front Page Continuation (72) Inventor Shuhei Iwashita, 1-4-16 Dojimahama, Kita-ku, Osaka-shi, Osaka Kyoei Steel Co., Ltd.

Claims (3)

[Claims] 1. A cooling floor main body for straightening and cooling a rolled steel which is cut into a predetermined length after rolling and is conveyed,
A carrying-in device, which is provided on the inlet side of the cooling floor main body, for carrying the steel strip into the cooling floor body, and carries out the steel strip from the cooling floor body, which is provided on the outlet side of the cooling floor body. And a cooling device, the cooling floor body,
A plurality of fixed rakes and a plurality of movable rakes are arranged alternately and in parallel with each other in a direction orthogonal to the conveyance direction of the bar steel, and the bar steel enters the fixed rake and the movable rake. The mountain-shaped teeth for forming the groove are formed at a predetermined pitch, and the movable rake performs a circular motion about a horizontal axis orthogonal to the longitudinal direction of the rake to thereby cause the groove in the groove of the fixed rake to move. In a cooling floor in a strip steel rolling facility for transferring strip steel intermittently from the inlet side to the outlet side of the cooling floor body, the groove is a large groove formed by the teeth, and the transfer of the strip steel in the teeth. A cooling floor in a steel strip rolling facility, comprising a small groove formed by cutting out a part of a slanted side on the downstream side in the direction. 2. The cooling floor according to claim 1, wherein the carrying-in device comprises a run-in trough for carrying in a small-sized steel bar such as a steel bar into the cooling floor main body. 3. The carry-in device includes a run-in trough for loading a small-sized bar steel such as a steel bar into the cooling floor body, and a small-sized bar steel such as a bar steel and a large-sized bar steel such as a shaped steel bar. At least the run-in table of the run-in table to be carried into, and a lift plate for forming a tip groove into which the small-sized bar steel enters is provided on the entrance side of the cooling floor main body. The cooling floor according to claim 1, wherein