JP2000263122A - Device for removing deposit on steel plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove deposits of fine and non-magnetic bodies in a condition in which an electromagnet is sufficiently distant from a steel plate by installing the electromagnet above the steel plate to be conveyed, and providing a spraying means of the magnetic fluid or fine iron powder. SOLUTION: Deposits 3 on a steel plate 1 are conveyed together with the steel plate 1, and when the deposits are brought into contact with the magnetic fluid 4, they are removed from the steel plate 1 by the magnetic force from a cylindrical electromagnet 2, and attracted to the cylindrical electromagnet 2 through the magnetic fluid 4. The deposits 3 can be removed even when the cylindrical electromagnet 2 is sufficiently distant from the steel plate 1 since the magnetic fluid 4 is interposed therebetween, and the steel plate 1 is prevented from being brought into contact with the cylindrical electromagnet 2. The magnetic fluid 4 is fed from a magnetic fluid feed nozzle 6 when the removing work of the deposits 1 is started. During the removing work, the magnetic fluid 4 is maintained by the cylindrical electromagnet 2, and not reduced in volume. However, it is slightly discharged together with chips, and it is refilled so as to fill a space between the steel plate 1 and the cylindrical electromagnet 2 from the magnetic fluid feed nozzle 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for removing deposits on a steel sheet.

[0002]

2. Description of the Related Art In a steel plate production line, dust dropped from above, spatter generated during welding, and the like adhere to the plate. If the deposits are left as they are, biting and crowding occurs between the roll and the steel sheet, resulting in a surface flaw of the sheet and lowering the quality of the steel sheet. JP-A-5-69030 has been proposed as an apparatus for removing deposits generated on a steel plate. As shown in FIG.
In this method, the sputter 3 'conveyed above is sucked and removed by the U-shaped electromagnet 2 installed above the steel plate. Since the welding spatter is only at the welded portion of the steel plate, after removing the spatter at the welded portion, the U-shaped electromagnet is moved from above the steel plate to cut off the electricity, and the continuous operation is performed by removing the spatter from the electromagnet.

[0003] In order to remove spatter by an electromagnet, it is necessary to bring the electromagnet close to the plate or increase the magnetic force of the electromagnet. In both of these methods, when the steel plate approaches the electromagnet due to vibration of the plate or the like, the electromagnet moves to the steel plate. Adhesion causes surface flaws on the plate. In addition, small-sized deposits adsorbed on the surface of the plate due to surface tension, etc., have a smaller volume than the surface tension, so it is difficult for them to be adsorbed by an electromagnet. Become.

[0004]

In the above-mentioned conventional technology, it is difficult to stably remove minute to large deposits in equipment in which the distance between the electromagnet and the steel plate changes due to vibration. there were. Further, it is impossible to remove the deposits of the non-magnetic material by the conventional technique. Therefore, an object of the present invention is to provide an attached matter removing device capable of removing minute attached matter of a non-magnetic material while the electromagnet and the steel sheet are sufficiently separated from each other.

[0005]

The attached matter removing apparatus of the present invention is as follows. (1) An apparatus for removing deposits on a steel sheet, wherein an electromagnet is installed above a steel sheet to be conveyed, and a means for ejecting a magnetic fluid or fine iron powder is provided therebetween.

(2) The apparatus for removing deposits on a steel sheet according to (1), wherein the electromagnets are rotatable cylinders and have a removing means capable of continuously removing the deposits attached to the electromagnets. is there.

(3) An apparatus for removing deposits on a steel sheet, wherein the apparatus for removing deposits on a steel sheet according to (1) is arranged at two or more upper and lower positions at line symmetrical positions of the steel sheet.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. As shown in FIG. 1, the deposit 3 attached to the steel plate 1
When conveyed together with the steel plate and comes into contact with the magnetic fluid 4, it is removed from the steel plate by the magnetic force from the electromagnet 2, and adheres to the electromagnet through the magnetic fluid. Since the magnetic fluid is interposed, even if the electromagnet is sufficiently separated from the steel sheet, it is possible to remove the deposits and prevent direct contact between the steel sheet and the electromagnet. The magnetic fluid is supplied from the magnetic fluid supply nozzle 6 at the start of the deposit removal operation.
During the removal operation, the magnetic fluid is not reduced because it is held by the electromagnet, but is slightly discharged with the discharge of the chips, so the magnetic fluid is supplied from the supply nozzle so as to fill between the steel plate and the electromagnet.

[0009] Further, by installing two upper and lower removing devices opposite to both sides of the steel sheet, not only can the attached matter on both sides of the steel sheet be removed, but also the attraction between the electromagnets and the magnetic force is strengthened, so that both electromagnets can be removed. The magnetic fluid can stably exist therebetween. In addition, by rotating the electromagnet as shown in FIG. 2 and removing the attached matter with the scraper 5, a stable attached matter removing operation can be performed. When two or more scrapers are arranged and movable in the width direction, and one of the scrapers 5 removes the deposit from the electromagnet,
By discharging the deposits deposited on the other scraper 5 ', continuous operation becomes possible. When the magnetic fluid rotates together with the deposits and a large amount of the magnetic fluid is discharged by the scraper, the scraper 5 is meshed to prevent the magnetic fluid from being discharged.

[0010] Deposits of non-magnetic material cannot be discharged by a conventional removing device. However, in the present invention, since the wall of the magnetic fluid is formed in the traveling direction of the plate,
Deposits are removed from the plate by resistance to the magnetic fluid. As described above, the present apparatus can remove not only magnetic but also non-magnetic deposits. As the material interposed between the electromagnet and the steel plate, not only a magnetic fluid but also fine iron powder which does not generate a flaw on the steel plate when contacted is possible.

[0011]

EXAMPLES As an example, the strength of the electromagnet is 0.05 to
If it is 0.3T (terrace), it is possible to remove extraneous matter. In addition, two to five of the present removing devices can be arranged in the passing direction, and by installing them in parallel, the removal rate of attached matter is improved. Distance between electromagnet and steel plate is 10mm to 100m
m. If it is less than 10 mm, contact between the steel plate and the electromagnet occurs, and if it is more than 100 mm, the magnetic force is weakened and sufficient removal is impossible. As a magnetic fluid to be used, a magnetic fluid in which 0.1 μm iron oxide of a normal specification is uniformly dispersed in an organic solvent or water is sufficient. When fine iron powder is used instead of the magnetic fluid, the iron powder has a diameter of 2 mm or less. If the thickness is 2 mm or more, there is a possibility that a flaw may be generated on the steel sheet by the iron powder.

[0012]

According to the present invention, by interposing a magnetic fluid or iron powder between a steel sheet and an electromagnet, the magnetic force of the electromagnet affects a long distance, so that it is possible to remove deposits even if a sufficient distance is provided between the steel sheet and the electromagnet. The contact between the steel plate and the plate can be prevented. Further, since the magnetic fluid forms a wall between the steel plate and the electromagnet, it is possible to remove non-magnetic material deposits due to the resistance to the magnetic fluid.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of an attached matter removing apparatus according to the present invention.

FIG. 2 is a top view of one embodiment of the attached matter removing device of the present invention.

FIG. 3 is a view schematically showing a conventional attached matter removing apparatus.

[Explanation of symbols]

 1: Steel plate 2: Cylindrical electromagnet 2 ': U-shaped electromagnet 3: Deposit 3': Sputter 4: Magnetic fluid 5: Scraper 6: Magnetic fluid supply nozzle

Claims (3)

[Claims] 1. An apparatus for removing deposits on a steel sheet, wherein an electromagnet is installed above a steel sheet to be conveyed, and means for ejecting a magnetic fluid or fine iron powder is provided therebetween. 2. The apparatus for removing deposits on a steel sheet according to claim 1, wherein the electromagnets are rotatable cylinders and have a removing means capable of continuously removing the deposits attached to the electromagnets. 3. An apparatus for removing deposits on a steel sheet, wherein the apparatus for removing deposits on a steel sheet according to claim 1 is disposed at two or more upper and lower positions at line symmetrical positions of the steel sheet.