JPH0985525A - Shear of continuous steel plate process line - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] A shear consisting of an upper blade and a lower blade with their blade surfaces opposed to each other for cutting the ends of a preceding plate and a following plate in a process line for continuously producing steel plates. In the above, there is provided a device which is hard to be magnetized by the magnetic field generated at the time of welding even if it is arranged in the vicinity of the welding electrode. SOLUTION: An upper blade 32a and a lower blade 3 constituting a shear.
A nonmagnetic lining 8 was applied to the portion of the cutting edge surface of 2b excluding the cut surface K.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper blade and a lower blade whose blade edges are opposed to each other for cutting the ends of a preceding plate and a following plate in a process line for continuously producing steel plates. It is about Shah.

[0002]

2. Description of the Related Art In a conventional continuous steel plate process line, for example, as shown in FIG. 5, (a) when the delivery of the leading plate 1 is completed, (b) the trailing end portion of the leading plate 1 by the delivery side clamps 11a, 11b. And (c) the front end portion of the trailing plate 2 is clamped by the inlet side clamps 21a and 21b, and then the upper blades 31a and 32a and the lower blades 31b and 32 whose blade edge surfaces are opposed to each other.
A shear consisting of b and b is placed on each side and each end is cut at the same time. Next, (d) the input side clamps 21a and 21b are brought close to the output side clamp sides 11a and 11b, and the leading plate 1
The rear end portion and the front end portion of the trailing plate 2 are overlapped with each other, and (e) the overlapped portions are welded by vertically facing electrodes 10a and 10b.

As a DC welding machine for joining the rear end of the leading plate and the leading end of the trailing plate, a shear and an electrode are arranged side by side in the plate width direction, and a carriage frame for supporting them is installed in the plate. Some are used by moving in the width direction.
Further, as the material of the shear blade, it is common to use metal such as high carbon steel because of the requirement for high strength.

[0004]

In such a DC welding machine, since the current-carrying direction is always constant, there is a risk that the steel parts near the electrodes and their lead wires will be magnetized and become permanent magnets. In particular, when the shear blade is magnetized, there is a problem that the end plate after cutting is attracted to the magnetized shear blade and is difficult to be discharged.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a shearing blade which is hard to be magnetized by the magnetic field generated during welding even when it is disposed in the vicinity of the welding electrode. .

[0006]

In order to solve the above-mentioned problems, the invention of claim 1 is for cutting the end portions of the preceding plate and the following plate in a process line for continuously producing the steel plate,
In a shear consisting of an upper blade and a lower blade whose blade edge surfaces are opposed to each other, at least one of the upper blade and the lower blade is subjected to a lining of a non-magnetic material in the continuous steel plate process line. The purpose is to provide a shear.

As a result, even if the shear is arranged in the vicinity of the welding electrode, the lining edge surface is less likely to be magnetized by the magnetic field generated during welding, and the end plate after cutting is attracted. Hard to do. The invention of claim 2 is characterized in that, in the shear of the continuous steel plate process line according to claim 1, the lining is applied to a portion of the cutting edge surface excluding the cut surface.

According to a third aspect of the present invention, in the shear of the continuous steel plate process line according to the first aspect, a ceramic lining is applied to the entire cutting edge surfaces of the upper blade and the lower blade. Examples of the material of the lining include synthetic resin, rubber, and ceramics. As a method of lining the blade surface, in the case of synthetic resin or rubber, a plate-shaped product is fixed to the blade surface with an adhesive. Examples of the method include a method of applying a liquid material to the blade surface and drying the same, and in the case of ceramics, a method of spraying the blade surface.

When the lining is made of synthetic resin or rubber, in order to maintain the sharpness of the blade, it is preferable that the portion other than the cut surface is lined as described in claim 2. Further, when the lining is made of ceramics, the sharpness of the blade is ensured by the ceramics, so that the entire cutting edge surface can be lined as in claim 3.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic sectional view showing a cutting state by a shear in a continuous steel plate process line, and FIGS. 2 to 4 are schematic side views showing respective embodiments of the shear of the present invention.

As shown in FIG. 1, the outlet clamps 11a,
In the state where the rear end of the leading plate 1 is clamped by 11b and the tip of the trailing plate 2 is clamped by the inlet side clamps 21a, 21b, the upper blades 31a, 32a and the lower blade 31 whose blade edge surfaces are opposed to each other.
A shear 5 composed of b and 32b is arranged. In this shear 5, the upper blades 31a, 32a and the lower blades 31b, 32b on the respective plate end sides are respectively provided with upper blade holders 4a, 32a.
The upper blade holder 4a is supported by the lower blade holder 4b.
Is connected to the upper blade cylinder 6a, and the lower blade holder 4b is connected to the lower blade cylinder 6b.

This shear 5 is a down-cut type, and the upper blade 3
1a and 32a move downward to cut a steel plate, and the lower blade holder 4b has built-in strut conveyors 15 and 16 for carrying out end plates. The strut conveyors 15 and 16 are driven by a chain conveyor 17 so that the end plates are carried out of the lower blade holder 4b.

In the embodiment of FIG. 2, the upper blade 32a
The ceramic liner 7 is formed on the entire cutting edge surface including the cut surface K of the metal base 32 for both the lower blade 32b and the lower blade 32b. This is formed by, for example, thermal spraying of ceramics on the base material 32, adhesion of a ceramics plate, or the like. Further, in the embodiment shown in FIG. 3, both the upper blade 32a and the lower blade 32b are provided with the rubber or synthetic resin liner 8 on the blade tip surface excluding the cut surface K of the metallic base material 32. This is, for example, the cut surface K of the cutting edge surface of the substrate 32.
It is formed by making a portion other than the portion recessed from the cut surface K, and fitting and bonding a synthetic resin molded product or a rubber molded product into this portion.

Further, in the embodiment shown in FIG. 4, both the upper blade 32a and the lower blade 32b have a cut surface K of the metal base 32.
The liner 9 made of rubber or synthetic resin is formed not only on the blade tip surface except for, but on the opposite surface, the lower surface of the upper blade 32a, and the upper surface of the lower blade 32b. This is formed, for example, by forming the base material 32 with recesses for arranging each liner 9 and fitting and bonding a synthetic resin molded product or a rubber molded product thereto.

2 to 4 show the upper blade 32a and the lower blade 32b on the inlet side of the shear 5, but similar liners 7 to 9 are formed on the upper blade 31a and the lower blade 31b on the outlet side. Has been done. Therefore, like a conventional DC welder,
Even if the shear 5 and the electrodes are attached to the carriage frame side by side in the plate width direction and the carriage frame is moved in the plate width direction and used, the liners 7 to 9 of the shear 5 are generated by the magnetic field generated during welding. Since the portion formed with is not magnetized, the end plate rides on the strut conveyor 15 by the cutting operation by the shear 5 and is easily carried out to the outside of the lower blade holder 4b as shown by reference numeral 1'in FIG.

On the other hand, when the upper blade and the lower blade made of metal on which such a liner is not formed are used for the cutting operation, the upper blade and the lower blade are magnetized by the magnetic field during welding. The end plate is attracted to the cutting edge surface of the lower blade 32b as indicated by reference numeral 2 ', enters the gap between the strut conveyor 15 and the lower blade holder 4b, and is difficult to carry out to the outside.

Further, in the embodiment shown in FIG. 2, since the lining 7 is applied to the entire cutting edge surface including the cutting surface,
Processing of the base material becomes easier as compared with the fourth and fourth embodiments. Further, in the embodiment of FIG. 4, it takes more time to process the base material as compared with the other embodiments, but it is also possible to prevent the end plate from being sucked not only on the cutting edge surface but also on other portions. In the above-described embodiment, the non-magnetic material linings are provided on both the blade edges of the upper blade and the lower blade, but the present invention also includes those provided only on one of the blade edges. In particular, in the down-cut type shear as in the above-described embodiment, the end plate is likely to be adsorbed to the blade tip surface of the lower blade, and therefore it is preferable to always provide the lining on the blade tip surface of the lower blade.

[0018]

As described above, according to the shear of the continuous steel plate process line of the present invention, even if the shear is arranged in the vicinity of the welding electrode, the lining edge surface is welded. The magnetic field generated at this time makes it difficult to magnetize and makes it difficult for the end plate after cutting to be attracted, so that the end plate can be easily carried out to the outside.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a cutting state by a shear in a continuous steel plate process line.

FIG. 2 is a schematic side view showing an embodiment of the shear of the present invention.

FIG. 3 is a schematic side view showing an embodiment of a shear of the present invention.

FIG. 4 is a schematic side view showing an embodiment of the shear of the present invention.

5A and 5B are views showing a joining procedure of a leading plate and a trailing plate in a continuous steel plate process line, in which FIG. 5A is a payout state of the leading plate, and FIG. Is supported, (c) is a state in which the ends of both plates are cut by a shear, (d) is a state in which the ends of both plates are overlapped, and (e) is an overlap. The state where the mating parts are welded is shown.

[Explanation of symbols]

 1 Leading Plate 2 Trailing Plate 5 Shear 7 Lining 8 Lining 9 Lining 31a, 32a Upper Blade 31b, 32b Lower Blade K Cut Surface

Claims (3)

[Claims] 1. A shear consisting of an upper blade and a lower blade with their cutting edge surfaces opposed to each other for cutting the ends of the leading plate and the trailing plate in a process line for continuously producing steel plates. A shear for a continuous steel plate process line, characterized in that at least one of the blade and the lower blade is lined with a non-magnetic material. 2. The shear for a continuous steel plate process line according to claim 1, wherein the lining is applied to a portion of the cutting edge surface excluding the cut surface. 3. A shear for a continuous steel plate process line according to claim 1, wherein the entire blade edge surfaces of the upper blade and the lower blade are provided with a ceramic lining.