Title of Invention: Foreign matter collection device and electrical steel sheet manufacturing facility including the same
technical field
[One]
The present invention relates to a foreign material collecting device and an electrical steel sheet manufacturing facility including the same.
background
[2]
A grain-oriented electrical steel sheet with magnetic properties with low iron loss and high magnetic flux density is required to reduce power loss and improve efficiency of electrical equipment such as transformers. A magnetic domain refining process is needed to improve iron loss by creating a groove by applying a high-power continuous wave laser beam that can form a groove on the surface of the grain-oriented electrical steel sheet.
[3]
As an example of the magnetic domain refinement and fixation of the grain-oriented electrical steel sheet, a technique for securing the iron loss improvement rate after heat treatment of the grain-oriented electrical steel sheet by forming a groove by vaporization of a material by pulse laser irradiation has been proposed.
[4]
However, such methods for permanent magnetic domain refining require forming grooves on the surface of the steel sheet. At this time, various types of foreign substances such as particles, chips, spatters, and fume are formed on the surface of the steel sheet. .
[5]
These foreign substances must be removed immediately after they occur, and if they are not removed immediately after they are generated, there is a problem of contaminating surrounding facilities and worsening the working environment.
[6]
In particular, when the optical system for transmitting the laser to the steel sheet is contaminated, the performance is rapidly deteriorated, and there is a problem in that it is impossible to secure the grooving quality and productivity.
[7]
Therefore, collection for the complete removal of these foreign substances is required, and in order to collect and remove foreign substances such as spatter and fumes, a collection device and method must be designed in consideration of the characteristics of foreign substances such as spatter and fumes.
[8]
Here, the spatter is approximately spherical in shape, has a size ranging from several hundred nm to several tens of um in diameter, and consists of Fe, Si, C, and O, and contains magnetic foreign substances, so its removal is difficult. It's a problem.
[9]
Moreover, the magnetic foreign material has a disadvantage in that it is difficult to collect by falling off after being attached to the magnetic member.
[10]
Therefore, there is a need for research on a foreign material collecting device capable of improving the above-described problems or limitations and an electrical steel sheet manufacturing facility including the same.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[11]
An object of the present invention is to provide a foreign material collecting device capable of removing foreign materials and an electrical steel sheet manufacturing facility including the same.
[12]
In another aspect, an object of the present invention is to provide a foreign material collecting device capable of easily removing magnetic foreign substances attached by magnetic force when removing foreign substances, and an electrical steel sheet manufacturing facility including the same.
means of solving the problem
[13]
The foreign material collecting device according to an embodiment of the present invention is connected to the collecting body unit and the collecting body unit having an inlet through which air containing magnetic foreign matter enters and an outlet through which the air from which the magnetic foreign material is removed is discharged, and the collecting body unit. Including a magnet member for separating the magnetic foreign material by attractive force in the air flowing inside the body unit, it may include a magnetic separation unit provided with a non-magnetic member surrounding the magnet member.
[14]
Specifically, the non-magnetic member of the foreign material collecting device according to an embodiment of the present invention is coupled to the collecting body unit, and is coupled to the non-magnetic plate part and the non-magnetic plate part formed of a non-magnetic material, in a plurality of columnar shapes. It is provided in the shape of a plurality of tubes to correspond to the provided magnet member, and may include a accommodating tube portion formed of a non-magnetic material.
[15]
Here, the receiving tube portion of the foreign material collecting device according to an embodiment of the present invention may be characterized in that the interval with the neighboring accommodation tube portion is arranged to be smaller than at least 30mm.
[16]
And, the receiving tube portion of the foreign material collecting device according to an embodiment of the present invention, it may be characterized in that the anti-drip tab formed to protrude in the circumferential direction on the outer surface is provided.
[17]
Here, the anti-drip tab of the foreign material collecting device according to an embodiment of the present invention may be characterized in that it is vertically coupled to the receiving tube in the form of a donut disk.
[18]
And, in the non-magnetic member of the foreign material collecting device according to an embodiment of the present invention, the gap between the first row of receiving pipe parts disposed upstream of the air flow direction is a second disposed downstream of the air flow direction. It may be characterized in that it is disposed wider than the interval between the two rows of receiving tube parts.
[19]
In addition, the magnetic separation unit of the foreign material collecting device according to an embodiment of the present invention is coupled to the magnet member, and provides a driving force for drawing in or withdrawing the magnetic member into the non-magnetic member coupled to the collecting body unit. It may include a driving member.
[20]
In addition, the collecting body unit of the foreign material collecting device according to an embodiment of the present invention, the inlet and the outlet are formed, the communication pipe member to which the non-magnetic member is coupled and the communication pipe member coupled to the lower portion of the communication pipe member It may include an underbox member for accommodating magnetic foreign substances falling from the.
[21]
In addition, the foreign material collecting device according to an embodiment of the present invention is provided adjacent to the non-magnetic member, may include a shower unit for spraying the fluid to the non-magnetic member.
[22]
Here, the shower unit of the foreign material collecting device according to an embodiment of the present invention may be characterized in that the fluid is sprayed in a downward inclined direction.
[23]
A foreign material collecting device according to another embodiment of the present invention includes a laser room provided with an electrical steel sheet, a laser device provided inside the laser room, and irradiating a laser to form a groove in the electrical steel sheet surface and the electrical steel sheet surface. It may include the foreign matter collecting device connected to the hood member for sucking the scattered foreign matter to receive the air containing the magnetic foreign matter.
Effects of the Invention
[24]
The foreign material collecting device of the present invention and an electrical steel sheet manufacturing facility including the same have an effect of removing foreign materials.
[25]
In another aspect, the foreign material collecting device and the electrical steel sheet manufacturing facility including the same of the present invention have the advantage of being able to easily remove the magnetic foreign material attached by magnetic force when the foreign material is removed.
[26]
However, the various and beneficial advantages and effects of the present invention are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the present invention.
Brief description of the drawing
[27]
1 is a block diagram showing a foreign material collecting device of the present invention.
[28]
Figure 2 is a perspective view showing the magnetic separation unit in the foreign matter collecting device of the present invention.
[29]
Figure 3 is a plan view showing an embodiment in which the distance of the receiving tube portion of the magnetic separation unit is adjusted in the foreign material collecting device of the present invention.
[30]
4 is a front view showing an embodiment in which a plurality of magnetic separation units are provided in a direction crossing the air flow direction in the foreign material collecting device of the present invention.
[31]
Figure 5 is a side view showing an embodiment in which the anti-drip tab is provided in the receiving tube portion of the magnetic separation unit in the foreign material collecting device of the present invention.
[32]
6 is a side view showing an embodiment in which the shower unit sprays the fluid in a downward inclined direction in the foreign material collecting device of the present invention.
[33]
7 is a block diagram showing an electrical steel sheet manufacturing facility of the present invention.
Best mode for carrying out the invention
[34]
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, the embodiments of the present invention are provided in order to more completely explain the present invention to those of ordinary skill in the art. The shapes and sizes of elements in the drawings may be exaggerated for clearer description.
[35]
Also, in this specification, the singular expression includes the plural expression unless the context clearly dictates otherwise, and the same reference signs or reference signs assigned in a similar manner throughout the specification refer to the same element or corresponding element. do it by doing
[36]
[37]
The present invention relates to a foreign material collecting device (1) and an electrical steel sheet manufacturing facility including the same, and it is possible to remove foreign substances, and from the other side, magnetic foreign substances attached by magnetic force can be easily removed by magnetic force when removing foreign substances. .
[38]
[39]
Specifically, with reference to the drawings, FIG. 1 is a configuration diagram showing a foreign material collecting device 1 of the present invention. Referring to the drawings, the foreign material collecting device 1 according to an embodiment of the present invention is magnetic It is connected to the collecting body unit 100 and the collecting body unit 100 having an inlet 111 through which air containing foreign substances enters and an outlet 112 through which air from which magnetic foreign substances are removed is formed, and the collecting body A magnetic separation unit including a magnet member 210 for separating the magnetic foreign material by attractive force from the air flowing inside the unit 100, and having a non-magnetic member 220 surrounding the magnet member 210 (200) may be included.
[40]
In this way, the foreign material collecting device 1 of the present invention can separate the magnetic foreign material by including the magnet member 210 that separates the magnetic foreign material by magnetic force in the magnetic separation unit 200 . In addition, the magnetic foreign material is configured not to be directly attached to the magnet member 210 by the non-magnetic member 220 provided to surround the magnet member 210 , thereby facilitating the separation of the magnetic foreign material.
[41]
[42]
The collection body unit 100 serves as a body of the device provided with the magnetic separation unit 200 and the like, and air containing magnetic foreign substances flows in, and also passes through the magnetic separation unit 200 and magnetic foreign substances. An inlet 111 and an outlet 112 may be formed to discharge the removed air to the outside.
[43]
In addition, a shower unit 300 to be described later may also be disposed in the collecting body unit 100 , and thus magnetic foreign substances attached to the magnetic separation unit 200 may be more effectively removed. A detailed description thereof will be described later with reference to FIG. 6 .
[44]
In addition, the collection body unit 100 may include an underbox member 120 that collects magnetic foreign substances dropped from the magnetic separation unit 200, thereby making it easier to process the separated magnetic foreign substances. have.
[45]
That is, in the collecting body unit 100 of the foreign material collecting device 1 according to an embodiment of the present invention, the inlet 111 and the outlet 112 are formed, and the non-magnetic member 220 is coupled. It may include a communication pipe member 110 and an underbox member 120 coupled to the lower portion of the communication pipe member 110 to accommodate magnetic foreign substances falling from the communication pipe member 110 .
[46]
Here, the communication pipe member 110 serves as a passage through which the air flows. That is, the inlet 111 and the outlet 112 are formed in the communication pipe member 110 to allow air to flow.
[47]
In addition, the magnetic separation unit 200 is provided in the communication tube member 110 to separate magnetic foreign substances from the air passing through the communication tube member 110 and remove them from the air.
[48]
In addition, the communication pipe member 110 may also be provided with the shower unit 300, whereby magnetic foreign substances attached to the magnetic separation unit 200 can be removed more effectively.
[49]
When the magnetic foreign material separated by the magnetic separation unit 200 falls off the magnetic separation unit 200 and falls, the underbox member 120 serves to collect it.
[50]
To this end, the underbox member 120 may be coupled to the lower portion of the communication pipe member 110 provided with the magnetic separation unit 200 . And in order to collect the falling magnetic foreign material, it may be provided in communication with the lower portion of the communication tube member (110).
[51]
[52]
The magnetic separation unit 200 serves to separate and remove magnetic foreign substances from the air containing the magnetic foreign substances. To this end, the magnetic separation unit 200 is connected to the collecting body unit 100 through which the air flows, and includes a magnet member 210 that separates the magnetic foreign material by magnetic force, and the magnetic foreign material is A non-magnetic member 220 surrounding the magnet member 210 so as not to be directly attached to the magnet member 210 may be included.
[53]
And, the magnetic foreign material separated from the magnet member 210 and attached to the outer surface of the non-magnetic member 220 by the magnetic force of the magnet member 210 is the magnet member 210 is the non-magnetic member ( 220) is configured to be dropped while exiting, a detailed description thereof will be described later with reference to FIGS. 2 to 4 .
[54]
[55]
Figure 2 is a perspective view showing the magnetic separation unit 200 in the foreign material collecting device (1) of the present invention, Figure 3 is the receiving pipe portion 222 of the magnetic separation unit 200 in the foreign material collecting device (1) of the present invention It is a plan view showing an embodiment in which the interval (I) is adjusted, and FIG. 4 is an embodiment in which a plurality of magnetic separation units 200 are provided in a direction crossing the air flow direction in the foreign material collecting device 1 of the present invention. This is the front view shown.
[56]
Referring to the drawings, the non-magnetic member 220 of the foreign material collecting device 1 according to an embodiment of the present invention is coupled to the collecting body unit 100, and a non-magnetic plate portion 221 formed of a non-magnetic material. ) and coupled to the non-magnetic plate part 221, provided in the shape of a plurality of tubes to correspond to the magnet member 210 provided in the shape of a plurality of pillars, and may include a accommodating pipe part 222 formed of a non-magnetic material. have.
[57]
As such, the non-magnetic member 220 includes the non-magnetic plate portion 221 and the receiving tube portion 222 , so that the magnet member 210 exits from the non-magnetic member 220 and the magnet The magnetic foreign material attached to the outer surface of the non-magnetic member 220 by the magnetic force of the member 210 may be configured to be detached.
[58]
In other words, the accommodating pipe portion 222 may be provided in a tube shape, and the magnet member 210 may be provided in a column shape that can be inserted into the tube-shaped accommodation tube portion 222 .
[59]
The non-magnetic plate part 221 is coupled to the collecting body unit 100, and the receiving tube part 222 is provided.
[60]
The receiving pipe part 222 is configured to be coupled to the collection body unit 100 through the non-magnetic plate part 221 , or may be directly coupled to the collection body unit 100 without the non-magnetic plate part 221 . have.
[61]
In addition, the receiving tube portion 222 has a configuration in which the magnet member 210 is inserted or the magnet member 210 is detached. In a state in which the magnet member 210 is inserted into the receiving tube portion 222, the magnetic foreign material is adhered to the outer surface of the receiving tube portion 222 by the attractive force of the magnet member 210 to attract the magnetic foreign material. , then, when the magnet member 210 is separated from the accommodating pipe part 222 material, the magnetic foreign substances attached to the outer surface of the accommodating pipe part 222 fall off and fall.
[62]
To this end, the receiving tube portion 222 has a tube shape corresponding to the column shape of the magnet member 210 . In addition, the magnet member 210 may be connected to a driving member 230 to be described later and configured to be inserted into or separated from the receiving tube portion 222 .
[63]
That is, the magnetic separation unit 200 of the foreign material collecting device 1 according to an embodiment of the present invention is coupled to the magnet member 210 , and the magnet member 210 is the collecting body unit 100 . It may include a driving member 230 that provides a driving force for drawing in or withdrawing the non-magnetic member 220 coupled to the .
[64]
Here, the driving member 230 may be a hydraulic or pneumatic cylinder that expands and contracts, or may be composed of an electric motor.
[65]
As described above, the driving member 230 provides a driving force for moving the magnet member 210 , whereby the magnet member 210 may operate to be inserted into or separated from the receiving tube portion 222 .
[66]
For example, the receiving tube portion 222 may have an open upper end and a closed lower end, and the magnet member 210 descends from the upper end of the receiving tube portion 222 and is inserted into the receiving tube portion 222, It may be connected to the driving member 230 constituted by a cylinder that rises and contracts so as to be separated from the accommodation pipe part 222 .
[67]
[68]
And, the receiving pipe portion 222 of the foreign material collecting device 1 according to an embodiment of the present invention may be characterized in that the interval (I) with the neighboring receiving pipe portion 222 is arranged to be smaller than at least 30mm. .
[69]
The reason why the interval I between the plurality of accommodation tube portions 222 is limited as described above is to separate magnetic foreign substances from the air passing between the accommodation tube portions 222 .
[70]
That is, if the interval (I) between the adjacent accommodating pipe parts 222 is wider than 30 mm, since the rate of collecting magnetic foreign substances in the air is significantly reduced, the interval (I) between the accommodating pipe parts 222 is limited. did it
[71]
[72]
In addition, the non-magnetic member 220 of the foreign material collecting device 1 according to an embodiment of the present invention is disposed between the receiving pipe portion 222 of the first row L1 disposed upstream of the air flow direction. It may be characterized in that the gap (I) is disposed wider than the gap (I) between the receiving pipe portions 222 of the second row (L2) disposed downstream in the flow direction of the air.
[73]
By disposing the receiving tube portion 222 in this way, magnetic foreign substances in the air passing through the collecting body unit 100 can be more effectively removed.
[74]
That is, the accommodating pipe part 222 of the first row L1 disposed upstream of the air flow direction is earlier than the receiving pipe part 222 of the second row L2 disposed downstream in the air flow direction. come into contact with air. At this time, since the gap I between the receiving pipe portions 222 of the first row L1 is relatively wide, the problem of obstructing the flow of air is reduced to the maximum, and the magnetic foreign material is primarily separated. And the second row (L2) accommodating pipe part 222, which is in contact with the air after the first row (L1) accommodating pipe part 222, increases the contact ratio with respect to the air from which the magnetic foreign material has already been primarily removed, while increasing the magnetic By removing foreign substances, more magnetic foreign substances are removed.
[75]
In addition, according to such an arrangement, the second row (L2) accommodating pipe part 222 is disposed between the first row (L1) accommodating pipe parts 222 in a direction crossing the flow direction of the air, so that the accommodating pipe part 222 is more effectively Removes magnetic foreign matter.
[76]
[77]
In addition, the non-magnetic member 220 of the foreign material collecting device 1 according to an embodiment of the present invention may be characterized in that it is provided in a plurality in a direction crossing the flow direction of the air.
[78]
Accordingly, the magnetic member inserted into the non-magnetic member 220 and a plurality of driving members 230 for moving the magnetic member may also be provided.
[79]
Accordingly, it may be provided to remove the magnetic foreign material only in a portion of the direction intersecting the flow direction of the air, so that the degree of collection of the magnetic foreign material can be adjusted.
[80]
[81]
5 is a side view showing an embodiment in which a drag prevention tab 222a is provided on the receiving tube portion 222 of the magnetic separation unit 200 in the foreign material collecting device 1 of the present invention. Referring to the drawing, The receiving pipe portion 222 of the foreign material collecting device 1 according to an embodiment of the present invention may be characterized in that an anti-traction tab 222a formed to protrude in the circumferential direction is provided on the outer surface.
[82]
As described above, the magnetic foreign material attached to the outer surface of the receiving pipe 222 when the magnet member 210 is separated from the receiving pipe 222 by being provided with the anti-attraction tab 222a in the receiving pipe 222 as described above. You will be able to avoid this escalating problem.
[83]
In other words, the cause of the attachment of the magnetic foreign material to the outer surface of the receiving tube portion 222 is due to the magnetic force of the magnet member 210. When the magnet member 210 is moved, the magnetic foreign material also moves along with the problem. there will be
[84]
Here, since the anti-traction tab 222a is formed to protrude from the outer surface of the accommodation tube portion 222 , it serves as an obstacle when the magnetic foreign material moves along the outer surface of the accommodation tube portion 222 .
[85]
Accordingly, the magnetic foreign material does not move along the magnet member 210, but is caught by the anti-traction tab 222a and is dropped off.
[86]
More specifically, the anti-drip tab 222a may have a disk shape in which the receiving tube portion 222 may be disposed in a center portion thereof.
[87]
That is, the anti-traction tab 222a of the foreign material collecting device 1 according to an embodiment of the present invention may be vertically coupled to the receiving tube portion 222 in the form of a donut disk.
[88]
As such, by the anti-traction tab 222a is vertically coupled to the outer surface of the receiving tube portion 222, the magnetic foreign material is further blocked from moving by the anti-traction tab 222a and the magnet member 210. It is possible to increase the rate of dropping out without moving along the
[89]
[90]
6 is a side view showing an embodiment in which the shower unit 300 sprays a fluid in a downward inclined direction in the foreign material collecting device 1 of the present invention. Referring to the drawings, according to an embodiment of the present invention The foreign material collecting device 1 is provided adjacent to the non-magnetic member 220 and may include a shower unit 300 for spraying a fluid to the non-magnetic member 220 .
[91]
That is, a shower unit 300 to be described later may also be disposed in the collecting body unit 100 , and thus magnetic foreign substances attached to the magnetic separation unit 200 may be more effectively removed.
[92]
In other words, the magnetic foreign material can be adhered to the non-magnetic member 220 by the magnet member 210 , but even after the magnet member 210 is separated from the non-magnetic member 220 . It may be attached by an adhesive force with the outer surface of the non-magnetic member 220, and the shower unit 300 serves to drop magnetic foreign substances attached to the outer surface of the non-magnetic member 220 as described above.
[93]
To this end, the shower unit 300 may spray the fluid toward the non-magnetic member 220 . The fluid may be, for example, a gas such as air, or a liquid such as water.
[94]
Here, the shower unit 300 of the foreign material collecting device 1 according to an embodiment of the present invention may be characterized in that the fluid is sprayed in a downward inclined direction.
[95]
In this way, the shower unit 300 limits the direction in which the fluid is sprayed to more effectively collect the magnetic foreign substances when the underbox member 120 is provided at the lower portion of the collection body unit 100 . it is for
[96]
That is, the shower unit 300 may be sprayed in a downwardly inclined form in order to be sprayed downward while spraying toward the non-magnetic member 220 so as to collide with the non-magnetic member 220 .
[97]
[98]
[99]
7 is a block diagram showing an electrical steel sheet manufacturing facility of the present invention. Referring to the drawings, the foreign material collecting device 1 according to another embodiment of the present invention is a laser room 2 in which an electrical steel sheet S is provided. ), which is provided inside the laser room (2) and irradiates a laser to form a groove on the surface of the electrical steel sheet (S) and a laser device (3) that sucks foreign substances scattered from the surface of the electrical steel sheet (S) It may include the foreign material collecting device 1 connected to the hood member (2a) to receive the air containing the magnetic foreign matter.
[100]
In this way, the electrical steel sheet (S) manufacturing facility of the present invention is provided with the laser device (3) in order to form a groove in the grain-oriented electrical steel sheet (S) to produce a magnetic domain refining product, and the laser device (3) The above-described foreign material collecting device 1 is provided for removing magnetic foreign substances from among foreign substances such as spatter and fumes generated when the groove is formed.
[101]
Here, the laser room 2 is provided with the laser device 3 , and a hood member 2a for delivering air containing foreign materials to the foreign material collecting device 1 may be provided. Then, the electrical steel sheet (S) is delivered to the laser room (2).
[102]
And, in the laser room 2, an air curtain 2c may be formed at the inlet and outlet of the electrical steel sheet S for sealing with the outside, and a roller for supporting the movement of the electrical steel sheet S (2b) may be provided.
[103]
The laser device is configured to irradiate a laser to form a groove in the electrical steel sheet (S). For example, the laser device 3 is composed of an on-off control system, a laser oscillator, and an optical system. The on-off control system enables the oscillator to be turned on under normal working conditions and automatically turns off the oscillator according to the amount of steel plate meandering. Off) can be turned off.
[104]
[105]
Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it is within the scope of the art that various modifications and variations are possible without departing from the technical spirit of the present invention described in the claims. It will be obvious to those of ordinary skill.
Claims
[Claim 1]
a collecting body unit having an inlet through which air containing magnetic foreign matter enters and an outlet through which air from which magnetic foreign matter is removed is discharged; and a magnet member that is connected to the collection body unit and separates the magnetic foreign material by attractive force from the air flowing inside the collection body unit, wherein the magnetic separation unit is provided with a non-magnetic member surrounding the magnet member. ; A foreign material collecting device comprising a.
[Claim 2]
According to claim 1, wherein the non-magnetic member, is coupled to the collecting body unit, a non-magnetic plate portion formed of a non-magnetic material; and a accommodating tube portion coupled to the non-magnetic plate portion, provided in a plurality of tube shapes to correspond to the magnet members provided in a plurality of columnar shapes, and formed of a non-magnetic material; A foreign material collecting device comprising a.
[Claim 3]
[Claim 3] The foreign material collecting device according to claim 2, wherein the receiving tube portion is disposed with an interval of at least 30 mm from a neighboring accommodation tube portion.
[Claim 4]
[Claim 3] The foreign material collecting device according to claim 2, wherein the receiving tube portion is provided with an anti-traction tab formed to protrude in the circumferential direction on the outer surface.
[Claim 5]
[Claim 5] The foreign material collecting device according to claim 4, wherein the anti-drip tab is vertically coupled to the receiving tube in the shape of a donut disk.
[Claim 6]
According to claim 2, wherein the non-magnetic member, the distance between the first row of receiving pipe parts disposed upstream in the air flow direction is greater than the distance between the second row of receiving pipe parts disposed downstream in the air flow direction. A foreign material collecting device, characterized in that it is widely disposed.
[Claim 7]
According to claim 1, wherein the magnetic separation unit, The magnet member coupled to the drive member providing a driving force for drawing in or withdrawing the magnet member to the non-magnetic member coupled to the collecting body unit; A foreign material collecting device comprising a.
[Claim 8]
According to claim 1, wherein the collecting body unit, The inlet and the outlet is formed doedoe, the communication pipe member to which the non-magnetic member is coupled; and an underbox member coupled to a lower portion of the communication pipe member to accommodate magnetic foreign substances falling from the communication pipe member; A foreign material collecting device comprising a.
[Claim 9]
According to claim 1, It is provided adjacent to the non-magnetic member, the shower unit for spraying the fluid to the non-magnetic member; A foreign material collecting device comprising a.
[Claim 10]
10. The apparatus of claim 9, wherein the shower unit sprays the fluid in a downwardly inclined direction.
[Claim 11]
a laser room in which electrical steel sheets are provided; a laser device provided in the laser room and irradiating a laser to form a groove on the surface of the electrical steel sheet; and the foreign material collecting device of any one of claims 1 to 10, which is connected to a hood member for sucking foreign substances scattered from the surface of the electrical steel sheet and receives air containing magnetic foreign substances; Electrical steel sheet manufacturing equipment comprising a.