KR101746800B1 - Apparatus for magnetic measurement of electrical steel sheet - Google Patents

Apparatus for magnetic measurement of electrical steel sheet Download PDF

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Publication number
KR101746800B1
KR101746800B1 KR1020150171785A KR20150171785A KR101746800B1 KR 101746800 B1 KR101746800 B1 KR 101746800B1 KR 1020150171785 A KR1020150171785 A KR 1020150171785A KR 20150171785 A KR20150171785 A KR 20150171785A KR 101746800 B1 KR101746800 B1 KR 101746800B1
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KR
South Korea
Prior art keywords
steel sheet
electric steel
board
measuring
sheet material
Prior art date
Application number
KR1020150171785A
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Korean (ko)
Inventor
봉원석
경 이
Original Assignee
주식회사 포스코
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Priority to KR1020150171785A priority Critical patent/KR101746800B1/en
Application granted granted Critical
Publication of KR101746800B1 publication Critical patent/KR101746800B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/0005—Geometrical arrangement of magnetic sensor elements; Apparatus combining different magnetic sensor types
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/0011—Arrangements or instruments for measuring magnetic variables comprising means, e.g. flux concentrators, flux guides, for guiding or concentrating the magnetic flux, e.g. to the magnetic sensor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/0047—Housings or packaging of magnetic sensors ; Holders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux

Abstract

The present invention relates to a method of manufacturing an electric steel sheet, which is arranged on an upper part of a device body provided on a supporting board so as to improve the quality through quality certification by quickly and accurately measuring the magnetism of the material by obtaining a stress change value through repetition of tensile and compression, A box-shaped measuring unit for measuring a change in stress of an electric steel sheet material inserted in an inner central portion; A fixing unit installed on each of left and right sides of the measurement unit to press both ends of the electric steel sheet material inserted into the measurement unit, And a test section for measuring repetitive magnetism through repeated tension and compression by pulling or compressing the material of the electric steel sheet which is installed and fixed to one side of the measurement section.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for measuring magnetic properties of an electric steel sheet,

Disclosed is an apparatus for measuring magnetic force of an electric steel sheet for measuring magneticity through a change in stress of an electric steel sheet material.

Generally, the electric steel sheet material is a high-quality steel sheet, which is assembled into a laminated structure through coils and shape processing, and is used for a motor and a transformer. The above-mentioned electric steel sheet material is under strict quality control during production process and quality control is one of the quality control measures, and the material is processed to a certain size to perform magnetic measurement experiment.

In other words, the magnetism is carried out according to the quality standard of use and the requirements of the customer.

However, due to intense technical competition, various customer requirements, and the purpose of producing high quality products, the importance of magnetism due to stress changes during material assembly and use is emerging. The magnetic value due to the change of the material stress during assembly and use is one of the important factors that determine the quality and performance and confirms the reliability of the quality through measurement and inspection.

However, it is difficult to quantitatively measure the magnetic force of the electric steel sheet due to the change of the stress of the material and the absence of the magnetic measuring device.

In order to measure the magnetic value according to the stress change of the material, a part of the processed material is fixed, and a magnetic part corresponding to the stress change acting on the material is repeatedly pulled or pushed, However, it is difficult to measure the magnetic value because of the occurrence of data deviation and reproducibility problem.

Due to the difficulties in measuring the quality of electrical steel sheet materials and the difficulty of measuring the magnetic properties due to stress changes in the applications being used, it is difficult to measure the quality of the produced materials and to respond technically.

Provided is a magnetic measuring device for an electric steel sheet, which can improve the quality by certifying the quality of a material by quickly and accurately measuring the magnetism of the material by obtaining a stress change value through repetition of tensile and compression in an electric steel sheet material.

A magnetic force measuring apparatus of an electric steel plate includes: a measuring unit arranged on the apparatus body to measure a change in stress of the inserted electric steel sheet material; A fixing unit installed at left and right sides of the measurement unit to fix both ends of the electric steel sheet material inserted into the measurement unit; And a testing unit installed on one side of the measuring unit to pull or press the fixed electric steel sheet material and measure the repeated magnetism through repeated tension and compression.

The measuring unit includes an upper board and a lower board each of which is formed on the upper side and the lower side of the measuring board, an upper magnetic body installed in a lower part of the upper board to generate a magnetic field, and a cup- A lower magnetic body for generating a magnetic field, and a coil box installed on the lower magnetic body and capable of measuring the magnetism of the material of the electric steel sheet.

The measuring unit may further include a handle installed on a front side of the apparatus body so as to move the upper board up and down so that the upper magnetic body is brought into close contact with the material of the electric steel plate.

The measurement unit has a structure in which a slit hole is formed in a space between the upper magnetic body and the lower magnetic body to insert and fix an electric steel sheet material.

The slit hole has a structure in which the height of the slit hole can be adjusted by raising and lowering the upper board through manipulation of the handle.

The coil box has a structure in which a PVC cover is provided outside the coil box and a coil is wound inside the coil cover.

A through hole is formed at the center of the coil box to correspond to the slit hole, so that the material of the electric steel sheet can be inserted.

And the through hole is formed at a position coinciding with a height of the lower magnetic body assembled to the lower board.

The fixing portion includes a fixed frame for pressing the left and right upper portions of the electric steel sheet material, and a lever for moving up and down the fixed frame.

One or more spring pins are installed on the upper portion of the fixed frame, and the spring pin connected to the lever is moved up and down through the operation of the lever.

The fixed frame is structured to fix or separate the electric steel sheet material to / from the apparatus by being elastically contacted or separated from the material of the electric steel sheet by moving up and down the spring pin.

The test portion includes a flow frame fixed to one end of the steel plate material and a cylinder installed at the rear of the flow frame to pull or push the flow frame.

The test unit may further include a controller for controlling repetitive operations of tension and compression by setting tension and compression programs of the steel material through the cylinder on one side thereof.

The upper board has a structure in which a saw-tooth-shaped stopper is provided on the front and rear sides of the lower board.

The bottom board has a structure in which a pipe socket to be assembled with the stopper is installed at a position corresponding to the top board.

The stopper is structured to move up and down within the pipe socket in the same manner as the elevating and lowering of the upper board through the operation of the handle.

According to this apparatus, it is possible to improve the quality of the electric steel sheet material by measuring the change of the stress of the material of the electric steel sheet and measuring the magneticity thereof, and by measuring the accurate quality and meeting the requirements of the customer.

In addition, by effectively measuring the magnetic properties of the electrical steel sheet material, it is possible to perform the quick and accurate quality certification work, and it is possible to secure the manufacturing technology of the material that accurately reflects the requirements of the customer.

1 is a schematic view showing an apparatus for measuring the magnetic force of an electric steel sheet according to the present embodiment.
2 is a schematic view showing one side of an apparatus for measuring magnetic force of an electric steel sheet according to the present embodiment.
3 is a schematic view showing a measurement unit of the magnetic measurement apparatus according to the present embodiment.
4 is a schematic view showing the structure of the magnetic measurement apparatus according to the present embodiment.
5 is a schematic view showing a cross-sectional structure of the magnetic measurement apparatus according to the present embodiment.
Fig. 6 is a schematic view showing a planar structure for Fig. 5. Fig.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a schematic view showing an apparatus for measuring the magnetic force of an electric steel sheet according to the present embodiment.

2 is a schematic view showing one side of an apparatus for measuring magnetic force of an electric steel sheet according to the present embodiment.

3 is a schematic view showing a measurement unit of the magnetic measurement apparatus according to the present embodiment.

4 is a schematic view showing the structure of the magnetic measurement apparatus according to the present embodiment.

As shown in Figs. 1 to 4, an apparatus for measuring the magnetic force of an electric steel sheet for measuring the magnetic properties of an electric steel sheet S processed to a constant size is disclosed.

In the present embodiment, the magnetic measuring apparatus includes a measuring unit 10 for largely measuring magnetism, a fixing unit 20 for fixing the electric steel sheet material S, and a test unit 20 for applying a tensile force or a compressive force to the electric steel sheet material S. [ (30).

That is, the measuring unit 10 is disposed on the upper part of the apparatus body 2 provided on the supporting board 1 constituting the lower part of the apparatus in the form of a box, and the stress of the electric steel sheet material S inserted in the inner central part thereof Can be measured.

The fixing portions 20 may be respectively installed on the right and left sides of the measuring portion 10 to press both ends of the electric steel sheet material S inserted into the measuring portion 10.

The testing unit 30 may measure repeated magnetism through repeated tension and compression by pulling or compressing the fixed steel sheet material S installed on one side of the measuring unit 10.

Here, the apparatus for measuring magnetic force of the electric steel sheet having the above structure is characterized in that the operation of the test unit 30 is performed while fixing the right and left sides of the inserted electric steel sheet S in a fixed size and shape with the fixing unit 20 So that the magnetic force can be measured through the magnetic field in a state in which stress is generated in the material S of the electric steel sheet.

The stress generated through the operation of the test part 30 is repeatedly (pulled / compressed) by pulling or pushing the steel sheet material S at regular intervals, or when the process of pulling constantly is completed, . ≪ / RTI >

The measuring unit 10 constituting the magnetic force measuring apparatus of the electric steel sheet includes a top board 11 and a bottom board 12 which are installed on the upper and lower sides of the measuring unit 10, A lower magnetic body 14 formed in a cup shape at the upper part of the lower board 12 to generate a magnetic field and a lower magnetic body 14 disposed at an upper portion of the lower magnetic body 14 to generate a magnetic field, And a coil box 15 which is installed in the electric steel sheet material S and is capable of measuring the magnetism of the electric steel sheet material S.

The measuring unit 10 is installed on the front side of the apparatus body 2 so that the upper magnetic body 13 is brought into close contact with the steel sheet material S by moving the upper board 11 up and down May further include a handle (40).

That is, by operating the handle 40 to elevate the upper board 11, the upper magnetic body 13 is raised to make space with the lower magnetic body 14, and the electric steel sheet material S is inserted into the space The upper magnetic body 13 of the upper board 11 is lowered by operating the handle 40 again so that the upper magnetic body 13 and the lower magnetic body 14 are brought into contact with the upper and lower portions of the steel sheet material S, do.

The electric steel sheet material S may be inserted and installed in a state of passing through a central portion of the coil box 15 installed on the upper portion of the lower magnetic body 14. [ In this state, the magnetic property of the steel sheet material S can be measured using the coil box 15. [

Therefore, the measurement unit 10 has a structure in which a slit hole 16 is formed in the space between the upper magnetic body 13 and the lower magnetic body 14 to insert and fix the steel sheet material S, The height of the upper board 11 can be adjusted by raising and lowering the upper board 11 through the operation of the handle 40. [

The height of the slit hole 16 can be adjusted by raising or lowering the upper magnetic body 13 with respect to the fixed lower magnetic body 14 by raising or lowering the upper board 11.

The coil box 15 into which the electric steel sheet material S is inserted is provided with a PVC cover on the outside thereof and a coil wound around the coil cover 15. The coil box 15 has a slit hole The through hole 15a is formed in the lower magnetic body 14 so that the through hole 15a can be inserted into the lower magnetic body 14 and the electric steel sheet material S can be inserted. As shown in FIG.

The fixing portions 20 are provided on the left and right sides of the measuring portion 10 and are pressed against the left and right upper portions of the electric steel sheet S inserted into the measuring portion 10 to fix the electric steel sheet material S. [ Includes a fixed frame 21 for pressing the left and right upper portions of the steel sheet material S by pressing and a lever 22 for moving the fixed frame 21 up and down.

One or more spring pins 23 are installed on the upper portion of the fixed frame 21 so that the spring pins 23 connected to the lever 22 are raised and lowered through the operation of the lever 22, The fixed steel frame 21 is elastically contacted with or separated from the steel sheet material S through the lifting and lowering of the spring pin 23 so that the steel sheet material S can be fixed or separated to the apparatus.

Therefore, the fixing part 20 is composed of the fixed frame 21, the lever 22 and the spring pin 23, and the fixing frame 21 moves up and down by the operation of the lever 22, So that the fixing frame 21 is elastically brought into contact with the left and right upper portions of the electric steel sheet material S by the operation of the spring pin 23 so that the electric steel sheet material S can be stably fixed .

The test portion 30 connected to the electrical steel sheet material S and adapted to apply a compressive force and a tensile force to the electrical steel sheet material S includes a flow frame 31 fixed to one end of the steel sheet material S, , And a cylinder 32 installed at the rear of the flow frame 31 and capable of pulling or pushing the flow frame 31.

The testing unit 30 may further include a controller 50 for controlling the repetitive performance of tension and compression by setting tension and compression programs of the steel sheet material S through the cylinder 32 on one side thereof have.

That is, the test section 30 moves the flow frame 31 connected to the steel sheet material S back and forth by operating the cylinder 32 at the back thereof, and the flow frame 31 is advanced The electric steel sheet material S can be compressed, and conversely, the flow frame 31 can be retracted and the electric steel sheet material S can be pulled and pulled. The magnetic force of the electric steel sheet material S can be measured by measuring the stress change through compression and tensile of the electric steel sheet material S.

The upper board 11 of the measuring unit 10 is provided with a stopper 11a which is serrated at the front and rear sides of the lower part of the upper board 11. The lower board 12 is connected to the pipe 11a, The socket 12a may be installed at a position corresponding to the top board 11. [

The stopper 11a is structured such that the stopper 11a can move up and down within the pipe socket 12a in the same manner as the vertical movement of the upper board 11 through the operation of the handle 40. [

Therefore, the operation of the handle 40 raises the stopper 11a to elevate the upper board 11, while the stopper 11a is lowered by the opposite operation of the handle 40, So that the upper board 11 can be lowered.

5 is a schematic view showing a cross-sectional structure of the magnetic measurement apparatus according to the present embodiment.

Fig. 6 is a schematic view showing a planar structure for Fig. 5. Fig.

As shown in FIGS. 5 and 6, the apparatus for measuring magnetic properties of an electric steel sheet measures the magnetic properties of the steel sheet material S continuously through tension and compression repetition of a fixed electric steel sheet material S through setting of a program can do.

In the present embodiment, an electric steel sheet material S having a predetermined shape and size is passed through the coil box 15 through the slit hole 16 of the measuring unit 10 and is seated.

The left and right fixing frames 21 of the fixing portion 20 are slid in the slit holes 16 through which the electric steel sheet material S can enter by the upward movement of the spring pin 23 through the disengagement operation of the lever 22 .

When the electric steel sheet material S is positioned at the lower ends of the right fixed frame 21, the coil box 15 and the left fixed frame 21, it is assembled on the front surface of the upper board 11 of the measuring unit 10 The upper magnetic body 13 assembled to the lower portion of the upper board 11 is brought into close contact with the surface of the steel sheet material S by rotating the handle 4 pulled forward and turning to the right. Electric steel sheet (S) Prevents deformation of the steel sheet material (S) during the magnetic measurement process by tensile and compression repeated by surface adhesion.

An electrical steel sheet material S is positioned and supported between a lower portion of the top board 11 and a magnetic field of the upper magnetic body 13 and the lower magnetic body 14 on the upper portion of the lower board 12, The stopper 11a assembled on the front / rear side is fixed inside the pipe socket 12a assembled on the front / rear of the lower board to prevent the flow of the upper board 11. [

When the spring pin 23 descends through the operation of the lever 22 on the right fixing frame 21 of the fixing portion 20, the lower fixing frame 21 is lowered to press a part of the steel sheet material S Fixed. When the spring pin 23 descends through the operation of the lever 22 on the left fixed frame 21 of the fixing portion 20, the lower fixed frame 21 descends to press a part of the steel sheet material S Fixed. That is, the left and right fixing frames 21 are brought into close contact with the surface of the electric steel sheet material S, so that the left and right electric steel sheet materials S can be fixed.

The left fixed frame 21 connected to the cylinder 32 of the test unit 30 flows while the electric steel sheet material S is fixed and the right fixed frame 21 is fixed to the electric steel sheet material (S).

Here, when the magnetic measuring device of the electric steel sheet is operated, tensile and compression are repeated at regular intervals by the operation of the cylinder 32 by the set program, compression is performed after the tensile force at constant intervals, .

The fixed frame 21 provided on the right and left sides of the fixing portion 20 is fixed to the spring pin 23 by the operation of the lever 22, And the left and right fixed frames 21 in which the electric steel sheet material S is pressed and fixed while the spring pin 23 is raised are sequentially lifted and separated from the electric steel sheet material S.

The handle 40 assembled on the front surface of the top board 11 is pulled forward and rotated to the left so that the stopper 11a assembled to the lower portion of the top board 11 is pulled out of the pipe socket 12a assembled on the upper board 12 So that a space is formed between the upper magnetic body 13 of the upper board 11 and the lower magnetic body 14 of the lower board 12. [

Accordingly, the electric steel sheet material S having been tested is separated from the apparatus, and the close contact of the top board 11 through the insertion of the new steel sheet material S and the left and right fixing frames 21 of the fixing portion 20 And the magnetism value according to the stress change through tension and compression is measured through fixing of the electric steel sheet material (S). This process is carried out continuously and repeatedly.

Therefore, it is possible to improve the quality of the electric steel sheet material (S) by measuring the stress of the electric steel sheet material (S) and measuring the magnetic properties thereof, It is possible to perform quick and accurate quality certification work, and it is possible to secure the manufacturing technology of the material that accurately reflects the requirements of the customer.

While the illustrative embodiments of the present invention have been shown and described, various modifications and alternative embodiments may be made by those skilled in the art. Such variations and other embodiments will be considered and included in the appended claims, all without departing from the true spirit and scope of the invention.

1: Support board 2: Device body
10: measuring part 11: upper board
11a: Stopper 12: Lower board
12a: pipe socket 13: upper magnetic body
14: lower magnetic body 15: coil box
15a: Through hole 16: Slit hole
20: fixing part 21: fixed frame
22: lever 23: spring pin
30: Test section 31: Flow frame
32: cylinder 40: handle
50: Controller S: Electric steel sheet material

Claims (16)

A measuring unit arranged on the apparatus body to measure a change in stress of the inserted electric steel sheet material; A fixing unit installed at left and right sides of the measurement unit to fix both ends of the electric steel sheet material inserted into the measurement unit; And a test section for measuring repetitive magnetism through repeated tension and compression by pulling or compressing the material of the electric steel sheet which is installed and fixed to one side of the measurement section,
The measuring unit includes an upper board and a lower board each of which is formed on the upper side and the lower side of the measuring board, an upper magnetic body installed in a lower part of the upper board to generate a magnetic field, and a cup- A lower magnetic body for generating a magnetic field, and a coil box installed on the lower magnetic body and capable of measuring the magnetic property of the material of the electric steel sheet,
Wherein the measuring unit further includes a handle installed on a front side of the apparatus body to move the upper board up and down so that the upper magnetic body is brought into close contact with the material of the electric steel plate,
Wherein the coil box is provided with a PVC cover on the outside thereof, and a coil is wound in the coil cover. delete delete The method according to claim 1,
Wherein the measuring unit has a slit hole formed in a space between the upper magnetic body and the lower magnetic body to insert and fix the material of the electric steel sheet. 5. The method of claim 4,
And the height of the slit hole can be adjusted by raising and lowering the upper board through manipulation of the handle. delete 5. The method of claim 4,
And a through hole corresponding to the slit hole is formed at the center of the coil box so that the material of the electric steel sheet can be inserted. 8. The method of claim 7,
Wherein the through hole is formed at a position coinciding with a height of the lower magnetic body assembled to the lower board. The method according to claim 1,
Wherein the fixing portion includes a fixed frame for pressing the left and right upper portions of the electric steel sheet material, and a lever for moving up and down the fixed frame. 10. The method of claim 9,
Wherein at least one spring pin is provided on the fixed frame, and the spring pin connected to the lever is moved up and down by the operation of the lever. 11. The method of claim 10,
Wherein the fixed frame is elastically contacted with or separated from the material of the electric steel sheet by moving up and down the spring pin to fix or separate the material of the electric steel sheet to the device. The method according to claim 1,
Wherein the test section comprises a flow frame fixed to one end of the electric steel sheet material and a cylinder provided at the rear of the flow frame to pull or push the flow frame. 13. The method of claim 12,
Wherein the test unit further comprises a controller for controlling the repetitive performance of tension and compression by setting tension and compression programs of the steel material through the cylinder on one side thereof. The method according to claim 1,
Wherein the upper board is provided with a stopper having a sawtooth shape in front of and behind the lower side of the upper board. 15. The method of claim 14,
Wherein the bottom board has a pipe socket to be assembled with the stopper at a position corresponding to the top board. 16. The method of claim 15,
Wherein the stopper is raised and lowered inside the pipe socket in the same manner as the ascending and descending of the upper board through the operation of the handle.
KR1020150171785A 2015-12-03 2015-12-03 Apparatus for magnetic measurement of electrical steel sheet KR101746800B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101959535B1 (en) * 2017-09-15 2019-03-18 주식회사 포스코 Apparatus for measuring magnetic field of electrolytic steel sheet
KR20190075488A (en) 2017-12-21 2019-07-01 주식회사 포스코 Apparatus for measuring delta ferrite and magnetism of metal plate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008122138A (en) * 2006-11-09 2008-05-29 Nippon Steel Corp Method and instrument for measuring magnetic characteristics and mechanical strength of steel sheet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008122138A (en) * 2006-11-09 2008-05-29 Nippon Steel Corp Method and instrument for measuring magnetic characteristics and mechanical strength of steel sheet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101959535B1 (en) * 2017-09-15 2019-03-18 주식회사 포스코 Apparatus for measuring magnetic field of electrolytic steel sheet
KR20190075488A (en) 2017-12-21 2019-07-01 주식회사 포스코 Apparatus for measuring delta ferrite and magnetism of metal plate

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