JPH08168917A - Side trimming device for metallic band - Google Patents

Abstract

PURPOSE: To provide a side trimming device for a metallic band, which can accurately cut both ends in width direction of a metallic band. CONSTITUTION: This device is one where metallic band pressing rollers 3 and 4 are arranged each adjacently within an upper round edge 1 and a lower round edge 2. Metallic band vibration suppressing rollers 10 and 11 are arranged on metallic band entry side of the upper round edge 1 and the lower round edge 2 of this device. This suppresses the vibration of the metallic band passing between the upper and lower round edges and vibration suppressing rollers 10 and 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side trimming device for metal strips.

[0002]

2. Description of the Related Art When a steel strip after hot rolling is pickled, or after cold rolling of a steel strip, side trimming is generally performed to cut both ends of a metal strip to a predetermined width size. However, if such side trimming of the metal strip is not performed properly, protrusions may occur at the lower end of the cut surface at both ends of the metal strip, diagonal cutting may occur, or the metal strip may be constrained inside the round blade. Otherwise, plastic deformation may occur and the coil winding shape after winding may be poor, and the coil may fall over or scratches may occur during transportation. In addition, as described above, when rolling a metal strip that is obliquely cut, edge cracks may occur at both ends of the metal strip, and the metal strip may be broken during rolling starting from the edge crack portions.

In order to eliminate such a difficulty and to properly perform side trimming of the metal strip, the pressing ring is arranged inside the upper round blade and the pressing ring is arranged outside the lower round blade. It is disclosed in Japanese Patent Application Laid-Open No. 2-30416 that the metal strip is pressed while being pressed, and thus the metal strip is cut while being pressed by the pressing ring on the inner side of the upper round blade and the outer side of the lower round blade. However, in the case of a metal band having a poor shape such as a metal band whose both ends are deformed into a wavy (ear wave) shape, it is difficult to reliably hold the metal band, resulting in a defective cut surface (so-edge), which causes scratches.

[0004]

The problem to be solved by the present invention is to solve the above-mentioned problems and to accurately press a metal strip in the vicinity of the cut portion even if the metal strip has a defective shape. It is an object of the present invention to provide a side trimming device for a metal band, which can surely prevent plastic deformation or the like from occurring in a cut portion and can perform cutting accurately.

[0005]

In the metal band side trimming device of the present invention which has solved the above-mentioned problems, the metal band pressing rollers are arranged adjacent to the insides of the upper and lower round blades, respectively. It is characterized by.

[0006]

[Function] The side trimming device for such a metal strip is
The metal strip that passes between the upper and lower round blades is located inside and adjacent to the upper and lower metal strips. Since both ends are cut by the round blade, when the both ends of the metal strip are sheared by the upper round blade and the lower round blade, the immediate vicinity of the cutting section is not lifted by the reaction force, etc. There is no so-called plastic deformation at both ends of the metal strip, and the coil winding shape after cutting becomes good. In addition, since there is no diagonal cutting and it will be cut almost vertically, it is possible to prevent cracks (edge cracks) at both widthwise ends of the metal strip during rolling in the next step, and the metal strip will break during rolling, etc. Can be reliably prevented.

Further, when the side trimming of the metal strip is performed as described above, if both ends of the metal strip are deformed in a wavy (ear wave) shape, the metal strip is likely to vibrate vertically when moving (passing). This is especially noticeable on high-speed threading lines, and this vibration may prevent accurate cutting of both ends of the metal strip. By placing the suppression roller in contact with the width of the metal strip that is trimmed in the width direction, it is possible to suppress the vibration of the threaded metal strip between the upper and lower round blades and the metal strip vibration suppression roller. By keeping the metal strip flat, both ends of the metal strip can be cut more accurately.

The metal strip side trimming device of the present invention is effective for a side trimming device such as a heat treatment furnace such as a continuous annealing furnace, a continuous hot dip galvanizing facility, and a pickling facility for hot rolled steel strip. Can be applied to.

[0009]

The present invention will now be described in detail with reference to the illustrated embodiments. 1 to 3, 1 and 1 are a pair of upper round blades for side trimming both ends of the metal strip 21, and 2 and 2 are lower round blades arranged below the upper round blades 1 and 1. The arrangement and the specific configuration are similar to those of the conventional side trimming device for this kind of metal strip. The metal band pressing rollers 3 and 4 are cap-shaped and cover the set nuts 3a and 4a of the upper round blade 1 and the lower round blade 2 from the inside, and are located near the inner sides of the round blades 1 and 2, and the upper and lower metal band pressing rollers The rollers 3 and 4 are for vertically pinching the metal strip 21 inside the upper round blade 1 and the lower round blade 2 while being rotated by the metal strip 21 passing between them. The upper metal band pressing roller 3 is rotatably supported by the tip of a holding arm 5 that is connected to a drive device 8 (fluid pressure cylinder or the like) via an operating arm 7, and is supported by a fixed bracket 6. It is configured to be pressed toward the lower metal band pressing roller 4 that is present.

Reference numerals 10 and 11 denote a pair of upper and lower metal band vibration suppressing rollers which are arranged to face the metal band inserting sides of the upper round blade 1 and the lower round blade 2, respectively. Is a metal band vibration suppressing roller 10 on the upper side, which covers the partial width of the metal band to be trimmed in the width direction.
Is a cylinder 12 and a metal belt vibration suppression roller 1 on the lower side.
The metal belt vibration suppression rollers 10 and 11 are pressed toward 1.
The vibration of the metal strip 21 passing through the space is suppressed.

The drive unit 8 constructed as above is
When the metal strip 21 is passed through the metal strip 21 while applying downward pressure to the upper metal strip pressing roller 3 via the operating arm 7 and the holding arm 5, both ends of the metal strip 21 become
When the side trimming is performed by the upper round blade 1 and the lower round blade 2 while passing between the lower round blade 2 and the lower round blade 2, the innermost portion of the cutting portion is pinched by the upper and lower metal band pressing rollers 3, 4. Therefore, the immediate vicinity of the inside of the cut portion is not lifted, and therefore, there is no plastic deformation at both ends of the metal strip after cutting, the coil winding shape after cutting is good, and there is almost no diagonal cutting. It can be cut vertically.

Further, even in a line in which the metal strip vibrates up and down largely due to the passage speed of the metal strip 21 and the like, each upper round blade 1
And the wide metal band vibration suppressing rollers 10 and 11 on the metal band insertion side of the lower round blade 2 pinch the metal band 21 before cutting to prevent vibration, so that the metal band formed by the upper round blade 1 and the lower round blade 2 The two ends of 21 can be cut accurately.

[0013]

As is apparent from the above description, the present invention is as follows.
The metal band pressing rollers arranged adjacent to the inside of the upper and lower round blades, respectively, cause plastic deformation due to lifting of the vicinity of the cut portion when cutting both ends of the metal band by the upper and lower round blades. In addition, the coil winding form is good, and scratches and the like do not occur, and there is no risk of falling, which is effective for safety. Moreover, since diagonal cutting is also eliminated, quality deterioration due to cracking at both ends of the metal strip during rolling of the metal strip,
It is possible to obtain an excellent effect such that the metal strip is not broken during rolling, the work efficiency is improved, and the yield is increased.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention.

FIG. 2 is a front view of an essential part showing an embodiment of the device of the present invention.

FIG. 3 is a plan view showing an embodiment of the device of the present invention.

[Explanation of symbols]

 1 Upper round blade 2 Lower round blade 3 Metal band pressing roller 4 Metal band pressing roller 10 Metal band vibration suppressing roller 11 Metal band vibration suppressing roller 21 Metal band

Claims (2)

[Claims] 1. A side trimming device for a metal band, wherein a metal band pressing roller is arranged adjacent to the inside of each of the upper round blade and the lower round blade. 2. The side trimming device for a metal band according to claim 1, wherein the metal band vibration suppressing rollers are arranged on the metal band entry sides of the upper round blade and the lower round blade.