KR101519948B1 - Welding Non-destructive Testing Device and Method Thereof - Google Patents

Welding Non-destructive Testing Device and Method Thereof Download PDF

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Publication number
KR101519948B1
KR101519948B1 KR1020140013924A KR20140013924A KR101519948B1 KR 101519948 B1 KR101519948 B1 KR 101519948B1 KR 1020140013924 A KR1020140013924 A KR 1020140013924A KR 20140013924 A KR20140013924 A KR 20140013924A KR 101519948 B1 KR101519948 B1 KR 101519948B1
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KR
South Korea
Prior art keywords
impact
hammer
test
fixing
coupled
Prior art date
Application number
KR1020140013924A
Other languages
Korean (ko)
Inventor
백준현
김병주
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(주)티에스앤이
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Priority to KR1020140013924A priority Critical patent/KR101519948B1/en
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Publication of KR101519948B1 publication Critical patent/KR101519948B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/08—Shock-testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0005—Repeated or cyclic

Abstract

According to an embodiment of the present invention, a device for non-destructive testing welding comprises: a fixing unit having at least one or more holding devices to fixate an object to be tested; an impact unit applying an impact a predetermined strength to the bottom surface of the object to be tested fixated to the fixing unit; and a detection unit measuring vibration and sound of the impact applied from the impact unit to the object to be tested.

Description

[0001] Welding Non-destructive Testing Device and Method [0002]

The present invention relates to an apparatus and a method for welding non-destructive testing, and more particularly, to a welding non-destructive testing apparatus and method for measuring the strength of a welding portion by a vibration sensed by applying an impact on a welding portion of the test body.

In general, Nondestructive Testing is a non-destructive test to check whether a product or material is defective, either internally or externally, either physically or chemically, without destroying or deforming the product or material. Destructive inspection, inspection, or alteration.

Radiographic Testing (RT), Ultrasonic Testing (UT), Magnetic Testing (MT), and Magnetic Testing (MT) are the most commonly used methods of NDT. , Liquid Penetrant Testing (PT), Eddy Current Testing (ETC), and Leak Testing (LT).

This can be applied to the product only one way or several methods can be applied at the same time.

Radiographic examination (RT) is a method to confirm the soundness of a product by radiographing the product using radiation. Ultrasonic testing (UT) is a method of confirming the health of a product by using ultrasonic waves.

In addition, non-destructive testing can be performed to check the existence of defects in the production / manufacture or use of any product to obtain the safety of the quality of the product. This means that the product must be subject to nondestructive inspection , But it is aimed to leave the law to ensure the safety of the product, and may be carried out for safety evaluation during use.

Radiographic inspection (RT) and ultrasonic inspection (UT) are applied for the purpose of detecting defects existing inside the product and are used for magnetic particle inspection (MT), penetration inspection (PT), eddy current inspection (ETC) (LT), etc. have a primary purpose in locating defects present on the surface of the product.

In order to obtain various results by measuring only the defects existing in the inside or the surface, various non-destructive tests have to undergo various tests, and thus the time and cost required for the inspection can be increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a welding nondestructive test apparatus and method for returning to an original state after a momentary impact is applied to a test object.

It is still another object of the present invention to provide a welding nondestructive testing apparatus and method capable of simultaneously grasping defects existing on the inside or on the surface of a welded portion by measuring the strength of the welded portion by vibration against impact applied to the test body.

According to an aspect of the present invention, there is provided a welding non-destructive testing apparatus, comprising: a fixing unit having at least one mounting device for fixing a test object; And a sensing unit for measuring vibration and sound of an impact applied to the test object by the impact unit.

The fixing unit includes a base plate formed to have a predetermined thickness so as not to move on the floor, a plurality of fixed columns extending upward from the upper edge of the base plate, and a base plate And a mounting device which is coupled to the fixed column and mounts the test body by hydraulic pressure.

Wherein the impact portion includes at least one fixed body coupled to an upper portion of the base plate, a stopper coupled to an upper end of the fixed body and having a through hole opened inside at a square angle, And a shock device moving up and down and impacting the lower end of the test body.

Wherein the impact device comprises a fixed bar having a rotary groove coupled with a rotation protrusion protruding in a semicircular shape at an upper end of the fixed bar, an impact cylinder coupled to a rear surface of the fixing bar and a rear surface of the fixing bar, And a hammer which rotates at a predetermined angle from the front surface of the fixing table and applies an impact to the test piece.

The hammer may be provided with a rotating hinge at a position where the hammer is coupled with the fixing table so as not to generate excitation after impacting the specimen and to lower the hammer.

The sensing unit includes a base plate coupled to a stand coupled to an upper portion of the base plate, an adjustment cylinder for adjusting a height of a throttle plate installed at an upper portion of the base plate, An acceleration sensor for sensing an acceleration of the hammer when an impact is applied to the test object, and a magnet provided on the acceleration sensor for detecting vibration generated by the hammer in contact with the test object.

The impact portion and the sensing portion may be formed facing each other to simultaneously measure the acceleration of the hammer and the vibration generated by the hammer.

According to another aspect of the present invention, there is provided a method of welding non-destructive testing comprising the steps of: (a) applying a shock by fixing a standard specimen; (b) analyzing the frequency and vibration of the standard test body to determine whether or not the test body is passed; (c) acquiring frequency and vibration data of the standard specimen when the standard specimen passes the reference value to generate a reference graph; (d) fixing the test body to the fixture; (e) attaching the impact portion and the sensing portion to the test position of the test body; (f) sequentially applying an impact to the test body; (g) analyzing a frequency and a vibration generated in the test body by the impact portion to generate a test graph; (h) comparing the test graph with the reference graph; (i) determining a failure for the test specimen that is outside the error range from the reference graph.

The fixing unit includes a base plate formed to have a predetermined thickness so as not to move on the floor, a plurality of fixed columns extending upward from the upper edge of the base plate, and a base plate And a mounting device which is coupled to the fixed column and mounts the test body by hydraulic pressure.

Wherein the impact portion includes at least one fixed body coupled to an upper portion of the base plate, a stopper coupled to an upper end of the fixed body and having a through hole opened inside at a square angle, And a shock device moving up and down and impacting the lower end of the test body.

Wherein the impact device comprises a fixed bar having a rotary groove coupled with a rotation protrusion protruding in a semicircular shape at an upper end of the fixed bar, an impact cylinder coupled to a rear surface of the fixing bar and a rear surface of the fixing bar, And a hammer which rotates at a predetermined angle from the front surface of the fixing table and applies an impact to the test piece.

The hammer may be provided with a rotating hinge at a position where the hammer is coupled with the fixing table so as not to generate excitation after impacting the specimen and to lower the hammer.

The sensing unit includes a base plate coupled to a stand coupled to an upper portion of the base plate, an adjustment cylinder for adjusting a height of a throttle plate installed at an upper portion of the base plate, An acceleration sensor for sensing an acceleration of the hammer when an impact is applied to the test object, and a magnet provided on the acceleration sensor for detecting vibration generated by the hammer in contact with the test object.

The impact portion and the sensing portion may be formed facing each other to simultaneously measure the acceleration of the hammer and the vibration generated by the hammer.

According to the apparatus and method for welding non-destructive testing according to the present invention, the hammer installed on the front surface of the impact portion can return to the original state after impacting the test object by the rotating hinge and prevent the vibration of the test object from propagating.

And, when the hammer impacts the test body, the sensing part is installed on the whole surface of the impact part so that the vibration can be detected, so that the strength of accurate welding can be measured.

1 is a perspective view showing a welding nondestructive testing apparatus according to an embodiment of the present invention;
2 is a perspective view illustrating a fixing unit according to an embodiment of the present invention;
FIG. 3 is a perspective view showing the fixing device of the fixing part shown in FIG. 2; FIG.
4 is a perspective view illustrating the impact portion according to an embodiment of the present invention.
5 is a perspective view illustrating a sensing unit according to an embodiment of the present invention.
FIG. 6 is an exemplary view illustrating a test using a shock portion and a sensing portion according to an embodiment of the present invention; FIG.
7 is a flowchart showing a welding nondestructive test method according to another embodiment of the present invention.
8 is a graph showing a comparison between a standard graph and a test graph according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and a method for welding non-destructive testing according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a welding nondestructive testing apparatus according to an embodiment of the present invention.

1, the apparatus for welding non-destructive testing according to an embodiment of the present invention includes a fixing part 100 having at least one mounting device 140, a test fixture 100 fixed to the fixing part 100, And a sensing unit 300 for measuring vibration and sound of an impact applied to the test object 10 by the impact unit 200 have.

The fixing unit 100 may include a mounting device 140 for fixing the test body 10 to an upper portion of the base plate 110 fixed to the floor. The mounting device 140 can adjust the height according to the shape of the test piece 10 and fix one side of the test piece 10 to prevent the test piece 10 from being moved or released when the non-destructive test is completed .

The impact portion 200 may apply an impact to the underside of the test body 10 with a predetermined strength. When an impact is applied to the underside of the test body 10, an impact is applied to the undersurface of the test body 10, 10 from the bottom surface.

The sensing unit 300 is disposed on the front surface of the impact unit 200 and senses the vibration transmitted to the test object 10 by the impact unit 200 and compares the vibration with the standard resonance phenomenon, can do.

The above-mentioned non-destructive testing apparatus can apply a shock at a predetermined strength which does not affect the function or the service life of the test body 10 without breaking the test body 10 when an impact is applied from the bottom surface of the test body 10.

The above-mentioned non-destructive testing apparatus can be applied to various materials other than the welding site.

FIG. 2 is a perspective view illustrating a fixing unit according to an embodiment of the present invention, and FIG. 3 is a perspective view illustrating a fixing apparatus of the fixing unit shown in FIG.

2 to 3, the fixing unit 100 according to an embodiment of the present invention includes a base plate 110 formed to have a predetermined thickness, and a base plate 110 extending upward from the upper edge of the base plate 110, A base plate 130 coupled to a center of the plurality of fixing columns 120 and a base plate 130 coupled to the fixing column 120 to press the test piece 10 by hydraulic pressure, And may be provided with a mounting device 140 for mounting.

The base plate 110 is formed to have a predetermined thickness so as not to move from the floor, and the impact is transmitted to the lower portion during welding non-destructive testing to prevent the base plate 110 from moving .

Although not shown in the figure, the base plate 110 may be filled with a separate material for increasing the strength of the base plate 110 to prevent the base plate 110 from moving on the floor.

The fixing pillars 120 may extend to the upper portion of the base plate 110 or the upper portion of the base plate 110 according to the shape of the base plate 130. A plurality of the fixing pillars 120 may be provided on the base plate 110 and may be variously formed according to the shape of the test body 10. The height of the fixing column 120 can be variously formed according to the shape of the test body 10 and fixed to the base plate 110.

The fixing column 120 may vertically extend upward from the base plate 110 and may include a reinforcing plate 121 for reinforcing the fixing column 120 on the side plate of the vertically extending fixing column 120, As shown in FIG. The reinforcing plate 121 can support and support the impact and the weight of the test body 10.

The base plate 130 may be formed at a predetermined height from the base plate 110 by being coupled to one surface of the plurality of fixing posts 120.

The base plate 130 includes an impact portion 200 for impacting the bottom surface of the test piece 10 fixed to the fixing portion 100 and a sensing portion 200 for sensing resonance derived from the impact portion 200. [ (300) may be installed on the upper part.

The mounting device 140 includes a cradle 141 coupled to an upper side of the fixed column 120 and capable of moving up and down and having the test body 10 mounted thereon at an upper end thereof, A mounting frame 142 for fixing the test body 10 and a mounting cylinder 144 coupled to the rear surface of the mounting frame 142 for rotating the mounting frame 142. [

The mounting base 141 may be coupled to the upper side of the fixing post 120. The position of the mounting base 141 coupled to the fixing post 120 may vary depending on the shape and size of the test body 10.

In addition, the holder 141 may further include a rubber packing to mount the test body 10 thereon. It is possible to prevent the test piece 10 from slipping off when the test piece 10 is fixed by the rubber packing and to prevent the test piece 10 from being damaged when the test piece 10 is fixed have.

The mounting frame 142 may be provided at an upper portion of the mounting base 141 to prevent the mounting body 141 from being detached from the mounting base 141. The mounting frame 142 rotates at one end of the mounting base 141 and can fix the test body 10. 3, the mounting frame 142 may be rotated at the upper end of the mounting table 141 and may have a rotation table 143 at the rear side.

The mounting cylinder 144 may be coupled with a rotation table 143 protruding from the rear surface of the mounting frame 142 so that the mounting frame 142 can be rotated at one end of the mounting table 141. The stationary cylinder 144 includes a lifter 144a which is coupled to the rear surface of the stationary frame 142 and reciprocates in a vertical direction and a stationary member 144a which is inserted and fixed to the rear surface of the stationary station 141, (144b).

When the stationary cylinder 144 reciprocates up and down the lifter 144a, the swivel base 143 of the stationary frame 142 coupled to the end of the lifter 144a rotates in conjunction with the base 141 The mounting frame 142 can be opened and closed at the upper portion of the mounting table 141.

4 is a perspective view illustrating an impact portion according to an embodiment of the present invention.

4, the impact portion 200 according to an embodiment of the present invention includes a fixed body 210 coupled to at least one of the upper portions of the base plate 130, A stopper (220) coupled to the stopper (220) and having a through hole with a rectangular opening therein; and a stopper (220) provided on the stopper (220) The impact device 230 may be provided.

The fixing unit 210 may be fixed on a base plate 130 coupled to a middle portion of a plurality of mounting devices 140 provided in the fixing unit 100. The fixing body 210 may have a coupling groove 211 through which the stopper 220 can be coupled to the front surface thereof and may be formed in a stepped manner on the rear surface thereof so that the impact cylinder 233 can be coupled.

In addition, the fixing body 210 may be formed by protruding a rotation protrusion 212 having a semicircular upper portion. The rotation protrusion 212 may be formed to have a predetermined height since it is coupled with the fixing table 231.

The stopper 220 may be inserted into the coupling groove 211 formed in the front surface of the fixing body 210 and may be fixed by a fixing hardware such as a screw or the like. .

The stopper 220 is coupled to the rotation protrusion 212 so that the front surface of the fixing table 231, whose front and rear surfaces are moved up and down by the rotation protrusion 212, Can be done.

For example, if the stopper 220 is not provided, the fixing table 231 may be lifted up to the upper side without stopping at the front surface, so that the impact strength of the test body 10 may be greater than the test strength. This may affect the function or lifetime of the welded portion of the test body 10. Therefore, the stopper 220 may be provided to stop the fixing table 231 without rising over a predetermined height, so that the test body 10 can be impacted with a predetermined strength less than the test strength.

The impact device 230 includes a fixing table 231 having a rotation groove 232 engaged with a rotation protrusion 212 protruding in a semicircular shape at an upper end of the fixing device 210, An impact cylinder 233 coupled to the rear surface of the fixing body 210 to move the fixing table 231 up and down and an impact cylinder 233 rotating at a predetermined angle from the front surface of the fixing table 231 to impact the test body 10 The hammer 234 may be provided.

The fixing base 231 is horizontally formed at the upper end of the fixing body 210 and has a rotation groove 232 in which a rotation protrusion 212 protruding from the upper end of the fixing body 210 is inserted into the lower center of the fixing base 231 ). The rotation groove 232 has a semicircular shape like a semicircle formed on the upper portion of the rotation protrusion 212 so that the rotation protrusion 212 rotates at a predetermined angle in the rotation groove 232 .

In addition, the fixing table 231 may have hinge holes at both ends thereof so that the hammer 234 and the impact cylinder 233 are engaged and rotated.

The impact cylinder 233 is coupled to an upper portion of a hinge hole formed on a rear surface of the fixing table 231 and is movable up and down. A lower portion of the impact cylinder 233 is connected to a lower end As shown in FIG. The shock cylinder 233 moves the rear surface of the fixing table 231 up and down so that the front surface of the fixing table 231 can move up and down when the rotation protrusion 212 serves as a lever of the fixing table 231. [ can do.

The hammer 234 rotates at a predetermined angle when the fixing table 231 moves up and down from the front surface of the fixing table 231 and can apply an impact to the welded portion of the test piece 10 with a predetermined strength. One side of the hammer 234 may be extended to engage with the fixing table 231 and a rotating hinge 235 may be provided at a position where the hammer 234 engages with the fixing table 231.

The hammer 234 may be raised to the upper part by the fixing table 231 and may be lowered to the lower part regardless of the fixing table 231 after an impact is applied to the test piece 10 by the rotary hinge 235. [ Since the hammer 234 is lowered immediately after the impact, the hammer 234 impacts the test object 10 with the human's wrist and then releases the hammer 234 from the test object 10 by the impact due to impact The same effect as the process can be exhibited.

For example, when the hammer 234 is fixed to the fixing table 231 and the fixing table 231 rises to the bottom surface of the test piece 10 to apply an impact to the test piece 10, It is possible to prevent the vibration of the hammer 234 that has been impacted from spreading. Therefore, the hinge 234 is provided between the hammer 234 and the fixing table 231 so that the hammer 234 can drop downward without hindering the vibration from spreading after the impact on the test body 10 have.

FIG. 5 is a perspective view of a sensing unit according to an embodiment of the present invention, and FIG. 6 is a view illustrating an example of a test using a shock unit and a sensing unit according to an embodiment of the present invention.

5 to 6, the sensing unit 300 according to an exemplary embodiment of the present invention includes a sensing unit 300 coupled to a base 400 coupled to an upper portion of the base plate 130, An adjusting cylinder 320 for adjusting the height of the adjusting plate 321 installed on the upper end of the base plate 310 and an adjusting cylinder 320 provided on the adjusting plate 321 to adjust the height of the hammer 234, An acceleration sensor 330 provided at an upper portion of the acceleration sensor 330 for detecting the acceleration of the hammer 234 when the hammer 234 is impacted by the hammer 234, And a magnet 340 for sensing vibration generated by the magnet 340.

The base plate 310 may be coupled to a stand 400 fixed on a base plate 130 coupled to a middle portion of a plurality of mounting devices 140 provided in the fixing unit 100. The stand 400 may be coupled to an upper portion of the base plate 130 and may have a cylindrical shape extending upward.

The base plate 310 may be coupled to the column extending upward at the center of the stand 400 and may be coupled to the column or coupled to a fixing plate installed on the stand 400.

The adjusting cylinder 320 is provided on the base plate 310 to adjust the height of the adjusting plate 321 installed on the upper end of the adjusting cylinder 320. The adjusting cylinder 320 may adjust the height of the adjusting plate 321 by means of hydraulic pressure and the adjusting cylinder 320 may have a separate adjusting device for finely adjusting the height of the adjusting plate 321 .

The adjusting plate 321 may be installed on the upper portion of the adjusting cylinder 320 and may be provided with a separate upper rail to move the acceleration sensor 330 horizontally.

The acceleration sensor 330 measures the acceleration of the hammer 234 at the acceleration sensor 330 when the hammer 234 is rotated upward by the fixing table 231, The strength transmitted to the test body 10 can be accurately estimated.

The magnet 340 is for measuring a resonance propagated in the test piece 10 after the hammer 234 impacts the test piece 10 with a predetermined strength and the upper part of the magnet 340 is connected to the test piece 10, (Not shown).

In the following description of the welding non-destructive testing method according to another embodiment of the present invention, the same reference numerals are used for the same components as those of the welding non-destructive testing apparatus according to the above-described embodiment, and a detailed description thereof will be omitted.

FIG. 7 is a flowchart illustrating a non-destructive testing method according to another embodiment of the present invention, and FIG. 8 is a graph illustrating a comparison between a standard graph and a test graph according to another embodiment of the present invention.

In step S1100, a standard specimen having a strength and a test condition as a reference value can be fixed to the fixing part (100). The standard test body may be fixedly mounted on a mounting device 140 of the fixing part 100.

The impact unit 200 and the sensing unit 300 may be attached to the base plate 130 of the fixing unit 100 in step S1200. At least one of the impact portion 200 and the sensing portion 300 may be attached to at least one of the base plates 130 to perform a non-destructive test on at least one position of the standard test body.

The step S1300 may apply an impact using the hammer 234 of the impact part 200 attached to the fixing part 100 in step S1200. The hammer 234 may be lowered by the rotary hinge 235 after excitation of the standard specimen without making excitation.

In step S1400, acceleration of the hammer 234 may be measured by the acceleration sensor 330 of the sensing unit 300 when the hammer 234 impacts the standard test body. The acceleration when the hammer 234 impacts the standard test body can be set to the standard acceleration.

In step S1500, when a shock is applied to the standard body using the hammer 234 in step S1300, the frequency and the vibration generated in the standard body may be measured in the magnet 340 of the sensing part 300. [

In step S1600, the frequency and vibration of the standard specimen measured in step S1500 may be set as a general acceptance reference value.

Step S1700 can acquire frequency and vibration data when the frequency and vibration of the standard body reach the reference value in step S1600.

Step S1800 can generate the reference graph 500 by graphing the data acquired in step S1700.

In step S2100, the test body 10 to be tested may be fixed to the fixing part 100. [

In step S2200, the impact unit 200 and the sensing unit 300 may be attached to the fixing unit 100 in step S2100.

In step S2300, a shock can be applied to the test body 10 using the hammer 234 of the impact portion 200. [

In step S2400, the acceleration sensor 330 of the sensing unit 300 may measure the acceleration of the hammer 234 of the impact unit 200 in step S2300.

In step S2500, when the acceleration of the hammer 234 measured in step S2400 is equal to or deviates from the standard acceleration by an error of about 1% as compared with the standard acceleration generated in step S1400, the hammer 234 is applied to the test object 10, It is possible to apply a re-shock. At this time, the hammer 234 may adjust the rotation acceleration to be equal to the standard acceleration to apply an impact.

In step S2600, if the rotation acceleration of the hammer 234 is equal to the standard acceleration in step S2500, the frequency and vibration of the test object 10 can be measured by the sensing unit 300. [

Step S2700 can acquire frequency and vibration data of the test body 10 in step S2600.

Step S2800 can generate the test graph 600 by graphing the data acquired in step S2700.

Step S3100 may compare the test graph 600 with the reference graph 500 generated in steps S1800 and S2800.

In step S3200, it is possible to determine the strength of the welded portion by judging whether the error is within the error range between the reference graph 500 and the test graph 600 compared in step S3100.

For example, if the vibration that is applied when a shock is applied to the welded portion of the test piece 10 in the impact portion 200 is within an error range of the test intensity as a result of measurement by the sensing portion 300, It can be judged that the reference value is not reached when the test strength is less than the test strength or is too far away.

The welded portion may be different from what is shown on the surface because different strengths may occur depending on various conditions such as the skill of the person performing the welding, the time, and the temperature. Therefore, although it may seem the same on the surface, when the impact is applied, the vibration can be changed according to the internal void, so accurate intensity measurement can be performed.

In addition, since the welded portion can be expressed by the sound of the impact, the strength of the welded portion can be measured by comparing the test strength with the reference value when hit with the hammer 234.

If the test graph 600 is within the error range between the reference graph 500 in step S3200, the process proceeds to step S3300.

In step S3400, if the test graph 600 deviates from the error range between the reference graph 500 in step S3200, it is determined that the test graph 600 is rejected and the test for the other test object 10 can proceed.

Although the apparatus and method for welding non-destructive testing according to one embodiment of the present invention have been described above, the spirit of the present invention is not limited to the embodiments shown in this specification. Those skilled in the art, who understands the spirit of the present invention, can readily suggest other embodiments by adding, changing, deleting, adding, or the like of components within the scope of the same idea, I would say.

10: Test body 100:
110: base plate 120: fixed column
130: base plate 140: mounting device
200: impact portion 210: fixed body
220: Stopper 230: Impact device
300: sensing unit 310: base plate
320: Adjusting cylinder 330: Acceleration sensor
340: Magnet

Claims (14)

A fixing unit having at least one mounting device for fixing the test body,
An impact portion for applying an impact to the bottom surface of the specimen fixed to the fixing portion at a predetermined strength,
And a sensing unit for measuring vibration and sound of an impact applied to the test object by the impact portion,
Wherein the impact portion includes at least one fixed body coupled to an upper portion of the fixed portion,
A stopper coupled to an upper end of the fixture and having a through hole whose interior is opened in a rectangular shape,
And an impact device that penetrates the stopper and is installed on the fixture so as to move up and down and impact the lower end of the specimen,
Wherein the impact device comprises a fixing table having a rotation groove engaging with a rotation projection protruding in a semicircular shape from an upper end of the fixture,
An impact cylinder coupled to a rear surface of the fixing table and a rear surface of the fixing body to vertically move the fixing table,
And a hammer which rotates at a predetermined angle from a front surface of the fixing table and applies an impact to the test specimen.
The method according to claim 1,
The fixing part has a base plate formed to have a predetermined thickness so as not to move on the floor,
A plurality of fixed columns extending upward from an upper edge of the base plate,
A base plate coupled to a center of the plurality of fixed pillars,
And a mounting device coupled to the stationary column for mounting the test object by hydraulic pressure.
delete delete 3. The method of claim 2,
Wherein the hammer is provided with a rotating hinge at a position where the hammer is engaged with the fixing table so as not to generate excitation after impact on the test specimen, and to lower the hammer.
3. The method of claim 2,
The sensing unit includes a base plate coupled to a stand coupled to an upper portion of the base plate,
An adjusting cylinder for adjusting a height of a throttle plate provided at an upper end of the base plate,
An acceleration sensor provided at an upper portion of the throttle plate to sense the acceleration of the hammer when the hammer impacts the test piece;
And a magnet disposed on the acceleration sensor and sensing a vibration generated by the hammer in contact with the test object.
The method according to claim 6,
Wherein the impact portion and the sensing portion are formed facing each other to simultaneously measure the acceleration of the hammer and the vibration generated by the hammer.
(a) fixing a standard test body and applying impact;
(b) analyzing the frequency and vibration of the standard test body to determine whether or not the test body is passed;
(c) acquiring frequency and vibration data of the standard specimen when the standard specimen passes the reference value to generate a reference graph;
(d) fixing the test body to the fixture;
(e) attaching the impact portion and the sensing portion to the test position of the test body;
(f) sequentially applying an impact to the test body;
(g) analyzing a frequency and a vibration generated in the test body by the impact portion to generate a test graph;
(h) comparing the test graph with the reference graph;
(i) determining a failure for the test specimen that is outside the error range from the reference graph,
Wherein the impact portion includes at least one fixed body coupled to an upper portion of the fixed portion,
A stopper coupled to an upper end of the fixture and having a through hole whose interior is opened in a rectangular shape,
And an impact device that penetrates the stopper and is installed on the fixture so as to move up and down and impact the lower end of the specimen,
Wherein the impact device comprises a fixing table having a rotation groove engaging with a rotation projection protruding in a semicircular shape from an upper end of the fixture,
An impact cylinder coupled to a rear surface of the fixing table and a rear surface of the fixing body to vertically move the fixing table,
And a hammer which rotates at a predetermined angle from the front surface of the fixing table and applies an impact to the test specimen.
9. The method of claim 8,
The fixing part has a base plate formed to have a predetermined thickness so as not to move on the floor,
A plurality of fixed columns extending upward from an upper edge of the base plate,
A base plate coupled to a center of the plurality of fixed pillars,
And a mounting device which is coupled to the fixed column and which mounts the test body by hydraulic pressure.
delete delete 10. The method of claim 9,
Wherein the hammer is provided with a rotating hinge at a position where the hammer is engaged with the fixing table so as to be lowered without causing an impact after the impact on the test specimen.
10. The method of claim 9,
The sensing unit includes a base plate coupled to a stand coupled to an upper portion of the base plate,
An adjusting cylinder for adjusting a height of a throttle plate provided at an upper end of the base plate,
An acceleration sensor provided at an upper portion of the throttle plate to sense the acceleration of the hammer when the hammer impacts the test piece;
And a magnet disposed on the acceleration sensor and sensing a vibration generated by the hammer in contact with the test object.
14. The method of claim 13,
Wherein the impact portion and the sensing portion are formed facing each other to simultaneously measure acceleration of the hammer and vibration generated by the hammer.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101657257B1 (en) * 2015-06-25 2016-09-13 (주)세아스 Apparatus for detecting welding defects of cutting tool
KR101876421B1 (en) * 2018-03-27 2018-07-09 김수열 System for welding and testing metal plate
KR102139715B1 (en) * 2019-01-25 2020-08-11 호진산업기연(주) Apparatus for test safety of sealed source capsule

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JPH087111B2 (en) * 1990-08-13 1996-01-29 ミサワホーム株式会社 Furniture strength tester
JP2011247700A (en) * 2010-05-25 2011-12-08 Central Res Inst Of Electric Power Ind Soundness diagnosing method, soundness diagnosing apparatus and soundness diagnosing program of concrete member
KR101301761B1 (en) * 2013-02-18 2013-08-29 한국기계연구원 Impact machine device using restoring force

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH087111B2 (en) * 1990-08-13 1996-01-29 ミサワホーム株式会社 Furniture strength tester
JP2011247700A (en) * 2010-05-25 2011-12-08 Central Res Inst Of Electric Power Ind Soundness diagnosing method, soundness diagnosing apparatus and soundness diagnosing program of concrete member
KR101301761B1 (en) * 2013-02-18 2013-08-29 한국기계연구원 Impact machine device using restoring force

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101657257B1 (en) * 2015-06-25 2016-09-13 (주)세아스 Apparatus for detecting welding defects of cutting tool
KR101876421B1 (en) * 2018-03-27 2018-07-09 김수열 System for welding and testing metal plate
KR102139715B1 (en) * 2019-01-25 2020-08-11 호진산업기연(주) Apparatus for test safety of sealed source capsule

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