JPH1190728A - Shearing method and its device for steel plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously shear two steel plates, which are obtained by dividing a steel plate into two portions by a slitter, to the lengths of respective products by an end shearing machine. SOLUTION: A lift-up device 21 for lifting up respective steel plates separately, is provided to a conveyance line for conveying the two steel plates 1A, 1B in parallel, and in response to the widths of the steel plates 1A, 1B to be lifted up, hydraulic jacks 24 for elevating and lowering lift-blocks 23 is elevated. At this time, the conveyance of one steel plate is temporarily stopped to allow the sheared-lines of the two steel plates to conform with each other, and then the two steel plates are simultaneously sheared. Further, a steel plate-length measuring device for measuring the conveyance distance of the respective steel plates, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for shearing a steel sheet which has been split into two parts by a slitter with an end shear to each product length.

[0002]

2. Description of the Related Art Generally, in plate rolling, as shown in FIG. 7, order products having various widths and lengths, such as A1, A2, A3, B1, B2, and B3, are combined into one sheet. The steel sheet 1 is rolled, the width is slit according to the order, and the length is cut. As shown in FIG. 8, the steel sheet 1 thus rolled is cooled in the cooling bed 2, passes through the crop table 4, the side plate 5, the slitter 6, and the end plate 7 via the transfer table 3. Are sheared as necessary to obtain desired products A1, A2, A3, B1, B2, B3. FIG. 9 is an explanatory diagram showing a shear line of the steel sheet 1 by each of the above-mentioned shearing machines. The cropper 4 shears the irregularly shaped portion 8 at the front and rear ends in the longitudinal direction of the steel sheet 1, the side shears 5 shear the crops 9 on both side edges of the steel sheet 1, and the slitter 6 splits the width of the steel sheet 1 into two. The steel plate 1 is sheared along to obtain steel plates 1A and 1B. End shear 7 cuts each divided steel plate 1A into shear lines 11A, 12A, 13A, 14A.
A, the steel sheet 1B is cut along the shear lines 11B, 12B, 13
B, sheared along 14B, product A of arbitrary length
1, A2, A3, B1, B2, and B3 are obtained.

The side shears 5 and the slitter 6 are usually installed continuously as shown in FIG. The side shear 5 fixes a knife on one of the left and right sides with respect to the steel sheet transport direction of the transport table 3 as a fixed blade (shear reference blade), and moves the other knife in the width direction of the steel sheet 1 to a predetermined width. The crop 9 on both sides of the steel plate 1 is sheared so that the width of the plate 9 becomes. Further, the slitter 6 converts the steel sheet 1 sheared by the side shear 5 into the steel sheet 1 as described above.
A, 1B, divided into two parts, each having a predetermined product width
A, a split steel plate 1B is obtained. Therefore, the divided steel plate 1A and the divided steel plate 1B, whose side edges are sheared by the side shears 5 and split by the slitter 6, are conveyed to the end shear 7 by the conveyance table 3a in a state where they are biased toward the side reference portion side of the side shears 5. Also,
In the case where the split steel plate 1A and the split steel plate 1B divided into two by the slitter 6 are each sheared into products of arbitrary length by the end shear 7, the split steel plates 1A and 1B split into two by the transfer table 3a are mutually independent. When the lengths of the products A1 and B1, A2 and B2, and A3 and B3 are different from each other as shown in FIG. The shear positions could not be matched and it was not possible to shear both simultaneously.

Therefore, in the conventional steel sheet shearing method, one of the split steel sheets 1A, 1B is cut by an overhead crane or the like.
(In most cases, the steel sheet on the opposite side)
a, the divided steel plates 1A or 1B which are unwound from the soil from the top and left on the transfer table 3a are sequentially sheared to an arbitrary length in accordance with the shear line, which has a problem that the shearing efficiency is poor.

As a method for solving the above problem, Japanese Patent Laid-Open No.
No. 66917 proposes an improved transfer table in which steel sheets divided into two in the sheet width direction by a slitter are conveyed in parallel to an end shear and the shear positions of the respective steel sheets are aligned and simultaneously sheared. The transfer table includes a base movable in the width direction of the steel plate, a transfer roller supported on the base, a clutch connecting the rollers, and a driving unit for independently driving the transfer rollers at both ends.

[0006]

The above prior art is excellent in that the shearing position of two steel plates can be adjusted online, but the operation is complicated and it takes a long time for precise alignment. Therefore, we have developed a technology that enables highly accurate positioning by simpler means. An object of the present invention is to provide an improved shearing method and an improved shearing apparatus for two parallel-conveying steel plates having different shearing positions.

[0007]

SUMMARY OF THE INVENTION According to the present invention, two steel plates conveyed in parallel are stopped and conveyed in parallel until the shear line of one of the steel plates coincides with the shear position of the shearing machine. After lifting up only the steel sheet whose shear line and the shear line of the steel plate coincided with each other, only the other steel plate is conveyed so that the shear line of the other steel plate coincides with the shear position of the shear machine,
Thereafter, the one steel plate is lifted down and unloaded onto a transfer table, and the two steel plates are simultaneously sheared by an end shear.

[0008] The apparatus of the present invention, which can suitably carry out the above-mentioned method of the present invention, is characterized in that a lift-up device for independently lifting each of two steel plates is inserted into a transfer line for transferring two steel plates in parallel. The lift-up device is provided between the rollers of the side table and the output side table, and the lift-up device is provided with a plurality of lift blocks supported via a hydraulic jack on a beam erected in a direction substantially perpendicular to the direction in which the steel plate is transported. A steel plate shearing device comprising: a mechanism for operating a required number of the lift blocks according to a plate width; and a steel plate length measuring device for measuring a transport distance of each of two parallel steel plates. .

The lift-up device is a device that lifts a steel sheet upward from a transport roller so as not to contact the steel sheet and interrupts the transport of the steel sheet. This device includes a plurality of steel plate lift blocks arranged side by side at right angles to the conveying direction of the steel plate, and includes a mechanism for operating a necessary lift block according to the width of the steel plate to be lifted. This mechanism may be an automatic control device or a manual mechanism. Also,
A steel plate measuring device is provided for measuring the transport distance of each of two parallel steel plates. Regarding such a steel plate length measuring device, a known device conventionally used may be used regardless of its type.

[0010] By these methods and devices, the shear lines of the steel sheets being conveyed in parallel can be matched very easily.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. FIG. 1 is a front view of a lift-up device 21 disposed between the rollers 20 of the transfer table 3a.
Is a plan view thereof. The lift-up device 21 has a plurality of lift blocks 23 that are constrained so as to be able to move only up and down on a beam 22 erected in parallel with the roller in the roller body length direction between the transport rollers 20 of the transport table 3a. 2
Hydraulic jack 24 for lifting and lowering the lift block attached to 2
Thus, each lift block 23 can be raised and lowered independently. The beam 22 has a structure in which both ends of the beam 22 are supported by the fixed frame 25 of the transport table 3.
Direction), a sliding plate 26 is attached. A shift hydraulic jack 27 is arranged at one end of the beam 22 so that the beam 22 can be shifted in the body length direction of the roller 20. This shift-up mechanism stops the parallel transfer until the shear line of one of the two steel plates, which are conveyed in parallel, coincides with the shear position of the shears, and stops the shift. After lifting only the steel sheet whose shear line coincides, only the other steel sheet is transported so that the shear line of the other steel sheet coincides with the shearing position of the shearing machine, and then when lifting down the one steel sheet, the lift This is for preventing the steel plate 1A from being lifted up, and then, after lifting the steel plate 1A, operating the shift hydraulic jack 27 to lower the two split steel plates 1A. 1B is used to slightly widen the interval. FIG. 3 shows, as an example, a state in which the steel plate 1A on the right side in the drawing is lifted up, and the lift block lifting hydraulic jack 24 that has been lifted up is shifted to the right side of the drawing by the shift hydraulic jack 27.

Here, the reference position 40 (see FIG. 1) for transporting the steel sheet to the end shear 7 is on the left side of the steel sheet in FIG. When the steel plate 1A is lifted up, the steel plate 1A
It is preferable to restrain them so that they do not shift. For example, it is preferable to attach an electromagnet to the top end of the lift block 23 and restrain the suction in a state where the lift is lifted up. FIG. 4 is a plan view of the entire arrangement of the lift-up device 21, and FIG. 5 is a side view thereof. A number of lift-up devices 21 are arranged on the entrance-side transfer table 3a and the exit-side transfer table 3b of the end shear 7. The lift-up device 21 is arranged in a range corresponding to the length of the steel sheet supplied and conveyed to the end shear 7 on the entrance side conveyance table 3a of the end shear 7 and in a range corresponding to the maximum product length on the exit side conveyance table 3b. doing.

FIG. 6 shows a non-contact type steel sheet length measuring device 28 attached to a beam 29 erected across the transfer table 3a immediately adjacent to the entrance side of the end shear 7, and the reference side length measuring device 28a is The fixed length measuring device 38b on the opposite side has a function of shifting in the width direction of the steel plate. The movement is shifted by rotating the screw 30 by the motor 32 via the coupling 31. 33 is a guide shaft. Thus, the length measuring device 28 on the opposite side to the reference side
By making it possible to shift b, the length can be measured irrespective of the split position of the split steel plate by the slitter.

[0014]

According to the present invention, the shear lines of the steel sheets being conveyed in parallel can be made very easily compared with the prior art, and the productivity can be improved. In addition, the efficiency of the shearing operation can prevent the steel sheet from staying in the shearing line, thereby improving the operation rate of the rolling line.

[Brief description of the drawings]

FIG. 1 is a front view of a lift-up device according to the present invention.

FIG. 2 is a plan view of the lift-up device of the present invention.

FIG. 3 is a view showing a state in which the lift-up device of the present invention is shifted.

FIG. 4 is an overall plan view of the lift-up device of the present invention.

FIG. 5 is an overall side view of the lift-up device of the present invention.

FIG. 6 shows a length measuring device.

FIG. 7 is an explanatory diagram showing a relationship between a rolled steel plate and a product.

FIG. 8 is a layout view showing a general steel plate shearing device.

FIG. 9 is an explanatory diagram showing shear lines of a rolled steel plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolled steel plate 2 Cooling bed 3 Carrying table 4 Crop shear 5 Side shear 6 Slitter 7 End shear 8 Front and rear end crop in the longitudinal direction of rolled steel plate 9 Both side edge crop of rolled steel plate 10 Splitting line by slitter 11A-14A Shearing line by end shear 11B-14B Shearing line at end shear 1A, 1B Split steel plate divided by slitter 20 Roller 21 Lift-up device 22 Beam 23 Lift block 24 Hydraulic jack for lifting and lowering lift block 25 Fixed frame 26 Sliding plate 27 Hydraulic jack for shift 28 Non-contact Non-contact type steel plate length measuring device on reference side 28a Non-contact type steel plate length measuring device on non-reference side 29 Beam 30 Screw 31 Coupling 32 Motor 33 Guide shaft 40 Reference position 41 Arrow

Claims (2)

[Claims] 1. A steel sheet transported in parallel is stopped until the shear line of one of the two steel sheets coincides with the shearing position of the shearing machine. After lifting only the steel sheet whose shear line coincides, only the other steel sheet is conveyed so that the shear line of the other steel sheet coincides with the shear position of the shearing machine, and then the one steel sheet is lifted down and the conveyance table is lifted down. A method for shearing a steel sheet, comprising unloading an upper part and simultaneously shearing two steel sheets with an end shear. 2. A lift-up device, which lifts each of the two steel plates independently, is provided between rollers of an end-shear entrance table and an exit table on a transfer line for transporting two steel plates in parallel. Is a plurality of lift blocks supported via a hydraulic jack on a beam erected in a direction substantially perpendicular to the transport direction of the steel sheet, and a mechanism for operating a required number of the lift blocks according to the width of the steel sheet to be lifted up. And a steel sheet length measuring device for measuring a transport distance of each of two parallel steel sheets.