JPH0650724U - Shearing equipment for metal strips - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a shearing facility that has a high squareness pass rate even when operating at high speed, and therefore can realize high productivity. [Structure] A shearing device arranged in a shearing line for cutting a metal strip into a sheet, in which a roller table is arranged adjacent to a downstream side of a shearing machine which constitutes a main part of the shearing device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a proposal for a shearing device arranged in a line for shearing a sheet-like plated steel plate (tin plate, tincree steel plate) for a can or an aluminum plate from a metal strip material.

[0002]

[Prior art]

 In general, thin steel plates (tin and tin-free materials) and aluminum plates are often sheared into sheets and provided to users. Therefore, in order to obtain these plates (sheets), the material supplier usually has a shearing line that continuously rewinds the coil to shear it into a sheet. Sheets that are sheared by this shearing line have strict requirements on length and squareness, for example, the squareness is 0.5 mm / m or less, and the length has an accuracy of ± 1.0 mm or less with respect to the required length. Is required. Moreover, the required accuracy tends to become more severe in recent years.

Therefore, in order to realize the above-mentioned required accuracy, the material supply manufacturer conducts a sampling inspection (actual measurement) of the shear sheet, and if it does not fall within the standard, it is of course a defective product. In order to avoid the problem, the line speed is usually reduced (≦ 200 m / min) to operate, but this has a problem that the production efficiency decreases. In order to avoid such problems, a method of straightening the edge of the sheet-threaded material with a side guide has been proposed in the past, but the straightened edge often bends, which causes quality defects. There was a new problem of inviting.

[0004]

[Problems to be solved by the device]

 The conventional steel plate shear line is mainly operated at a low speed of less than 200 m / min for the reasons described above. The reason is that in high speed operation, the squareness is out of the standard. This significantly deteriorates the operation efficiency, productivity and yield of this shear line, and finally, there is a problem that this is reflected in the product cost. An object of the present invention is to provide a shearing equipment which has a high squareness acceptance rate even at a high speed operation and therefore can realize high productivity.

[0005]

[Means for Solving the Problems]

 As a result of various experiments to achieve the above purpose, the inventors have come to the conclusion that the shearing equipment having the following gist structure is effective. That is, the present invention is characterized in that, regarding the shearing equipment in the shearing line for cutting the metal strip into a sheet shape, the roller table is arranged adjacent to the downstream side of the shearing machine which constitutes the main part of the shearing equipment. It is a shearing equipment for metal strips.

[0006]

[Action]

 The shearing equipment according to the present invention is designed so that the accuracy of the square shearing does not decrease even if the speed of the shearing line is increased to 200 m / min or more.

Generally, the accuracy such as the sheet length after shearing can be improved by improving the mechanism and control system of the shearing machine itself, but the accuracy of the squareness is insufficient with these improvements. This is because the accuracy of this squareness is mainly affected by the meandering phenomenon of the strip. Therefore, in the present invention, in order to improve the rectangular shear accuracy under the high-speed shearing condition, it is decided to improve the right-angled shear accuracy by adopting an equipment configuration such that such strip meandering does not occur. . Therefore, in the present invention, a roller table is arranged adjacent to the downstream side of the shearing machine, and a portion corresponding to the length of the shearing sheet at the leading end of the passing strip is temporarily held on this roller table and then sheared. , So that it was conveyed to the subsequent belt conveyor. By using a so-called roller table, the horizontal and parallelism of the transport strip can be easily secured, so that the deflection of the strip leading end is eliminated.

FIG. 1 is a diagram of a typical thin steel plate shearing line, in which a coil 1 attached to an unwinding machine is unwound to form a strip-shaped steel sheet 2 which is conveyed in the direction of arrow 11. Then, through the inspection device 3 such as a pinhole inspection device, a shearing device 5 having a knife 4 on the upper and lower sides continuously shears the sheet at a predetermined length to form a shearing sheet 6, which is conveyed by a subsequent belt conveyor 7. And is piling.

In addition, the squareness of the shear sheet 6 is measured by measuring the gap 9 with a right-angled surface plate 8 as shown in FIG. 2 so that the value of the gap 9 is within 0.5 mm / m. The pass / fail judgment is made based on whether or not.

Generally, the perpendicularity of the sheared sheet is determined only by the perpendicularity of the shearing machine 5 to the knife 4 if no meandering occurs during the transportation of the steel strip 2, but in reality, the installation of each facility / equipment, etc. Due to the precision, the steel strip 2 cannot be conveyed straight. For example, the installation accuracy of the transport roll and the shearing machine 5, that is, the levelness / parallelism must be adjusted within 5/100 mm / m. However, as a practical matter, the squareness of the shearing sheet 6 often deviates significantly from 0.5 mm / m at a line speed of 200 m / min or more. This tends to be particularly affected by acceleration and deceleration.

[0011]

【Example】

 The details of the configuration of the present invention will be described below based on embodiments. In the case of high-speed shearing at a line speed of 200 m / min or more where the meandering is likely to occur, in the conventional technology, even if the meandering means of the shearing machine 5 such as conveying rolls are highly accurate, It is extremely difficult to keep the perpendicularity within 0.5 m / m even after the state where the above-mentioned phenomenon does not occur. According to the shearing equipment of the present invention as illustrated in FIG. 3, the squareness can always be within 0.5 m / m.

This effect in the present invention is due to the fact that the roller table 10 is installed at the adjacent position (immediately after) on the downstream side of the shearing machine 5. That is, in such shearing equipment, the rewound steel strip 2 is conveyed in the direction of arrow 11 and is fed until the tip portion thereof reaches the roller table 10 arranged on the downstream side of the shearing machine 5. It is designed to be held on a table and then sheared by a knife 4, and the resulting sheared sheet 6 is then conveyed to a succeeding belt conveyor 7 via a roller table 10, but a series of steps is actually performed. Since it proceeds smoothly, even if high-speed shearing of 200 m / min or more was performed, the standard deviation of squareness did not occur at all.

On the other hand, in the conventional shearing equipment, the adjacent position on the downstream side of the shearing machine 5 is the belt conveyor 7, and the leading end of the strip material 2 before shearing contacts the belt conveyor 7. When the belt conveyor 7 is meandered, it directly swings the front end of the sheet 6 before shearing, so that the squareness is strongly affected. Therefore, in the prior art, as the length of the shearing sheet 6 becomes longer, the range in which the shearing sheet 6 comes into contact with the belt conveyor 7 becomes wider, and the squareness has a stronger influence.

[0014]

[Effect of device]

 As described above, according to the present invention, by arranging the roller table 10 at the adjacent position on the downstream side of the shearing machine 5, the horizontalness and parallelism with the shearing machine 5 can be easily obtained, so that the bending of the shearing sheet 6 is prevented. It can be effectively prevented. By adopting such shearing equipment, even if the line speed is 250 m / min, the squareness is not affected by acceleration / deceleration, and the standard value of 0.5 mm / m is greatly improved to 0.2 mm / m or less. Can be achieved.

[Brief description of drawings]

FIG. 1 is a side view of an inlet side of an exemplary shear line.

FIG. 2 is a schematic view of a right-angled surface plate for measuring a squareness of a sheared sheet.

FIG. 3 is a side view showing the configuration before and after the shearing equipment of the present invention.

[Explanation of symbols]

 1 Coil 2 Steel Plate 3 Inspection Device 4 Knife 5 Shearing Machine 6 Shearing Sheet 7 Belt Conveyor 8 Right Angle Surface Plate 9 Gap 10 Roller Table

Claims (1)

[Scope of utility model registration request] 1. A shearing facility in a shearing line for cutting a metal strip into a sheet, wherein a roller table is arranged adjacent to a downstream side of a shearing machine which constitutes a main part of the facility. Strip shearing equipment.