KR20100000814U - Magnetic flaw detector - Google Patents

Magnetic flaw detector Download PDF

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KR20100000814U
KR20100000814U KR2020080009454U KR20080009454U KR20100000814U KR 20100000814 U KR20100000814 U KR 20100000814U KR 2020080009454 U KR2020080009454 U KR 2020080009454U KR 20080009454 U KR20080009454 U KR 20080009454U KR 20100000814 U KR20100000814 U KR 20100000814U
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magnetizing
magnetic
stimulus
stimulation
horizontal frame
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KR2020080009454U
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Korean (ko)
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이상훈
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최은숙
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
    • G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/91—Investigating the presence of flaws or contamination using penetration of dyes, e.g. fluorescent ink
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
    • G01N27/87—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using probes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9006—Details, e.g. in the structure or functioning of sensors

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  • Electrochemistry (AREA)
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  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

본 고안은 복잡한 형상을 갖는 피검사체의 전체 표면에 자분액이 균일하게 살포되어 피검사체의 결함이 정확하게 탐상될 수 있도록 한 자분탐상기에 관한 것이다.

본 고안은 수평프레임(10)상에 피검사체(28)가 고정되는 고정형 자화자극(14)과 가동형 자화자극(26)이 배치되고 피검사체(28)가 고정되는 두 자화자극(14)(26)의 상부측에 자분액살포관(30)이 배치되는 자분탐상기를 제공한다. 본 고안에 따라서, 자화자극(14)(26)을 갖는 수평프레임(10)의 조립체가 자화자극(14)(26)의 수평중심축선을 중심으로 하여 회전될 수 있도록 자화자극(14)(26)의 수평중심축선상에서 자화자극(14)(26)을 갖는 수평프레임(10)의 조립체의 양측에 축봉(46)(50)을 배치하여 고정착설되는 수직고정대(42)(42')의 베어링(44)(44')에 축설하고, 일측 축봉(46)에 회전수단을 착설한다.

Figure P2020080009454

자분탐상기, 자화자극, 피검사체, 회전수단.

The present invention relates to a magnetic particle flaw detector, which allows the magnetic powder to be uniformly sprayed on the entire surface of the subject having a complicated shape so that defects of the subject can be accurately detected.

The present invention has a fixed magnetization stimulus 14 and a movable magnetization stimulus 26, which is fixed on the horizontal frame 10, the movable magnetization stimulus 26 is arranged, and the two magnetic stimulation stimulus 14 ( The magnetic powder flaw detector 30 is provided on the upper side of the magnetic powder spray tube 30. According to the present invention, the assembly of the horizontal frame 10 having the magnetizing stimulation 14, 26 is magnetized stimulation 14, 26 so that it can be rotated about the horizontal center axis of the magnetizing stimulation 14, 26. Bearings of vertical anchors 42, 42 ', which are fixedly mounted by placing shafts 46, 50 on both sides of the assembly of the horizontal frame 10 having magnetizing stimuli 14, 26 on the horizontal center axis of (44) (44 '), and the rotating means is installed on one side rod (46).

Figure P2020080009454

Magnetic particle flaw detector, magnetizing stimulus, inspected object, rotating means.

Description

자분탐상기 {MAGNETIC FLAW DETECTOR}Magnetic particle detector {MAGNETIC FLAW DETECTOR}

본 고안은 자분탐상기에 관한 것으로, 특히 복잡한 형상을 갖는 피검사체의 전체 표면에 자분액이 균일하게 살포되어 피검사체의 결함이 정확하게 탐상될 수 있도록 한 자분탐상기에 관한 것이다. The present invention relates to a magnetic particle flaw detector, and more particularly, to a magnetic particle flaw detector which allows the magnetic powder to be uniformly sprayed on the entire surface of the subject having a complicated shape so that defects of the subject can be accurately detected.

통상적으로 강재주조물의 형태인 피검사체는 대향된 자화자극내에 고정된 상태에서 피검사체의 표면에 자분액이 살포공급된 후 자화자극의 자화작용으로 피검사체의 결함이 탐상될 수 있도록 되어 있다.In general, the test object in the form of steel casting is fixed in the opposite magnetizing stimulus, and the magnetic powder is sprayed and supplied to the surface of the test subject, and the defect of the test subject can be detected by the magnetization of the magnetizing stimulus.

종래 이러한 종류의 자분탐상기에 있어서는 피검사체는 양측의 대향된 자화자극내에 고정된 상태에서 자분액이 상부로부터 피검사체의 표면에 살포될 수 있게 되어 있다.In the conventional magnetic particle flaw detector of this kind, the magnetic fluid can be sprayed onto the surface of the inspected object from the top in a state where the inspected object is fixed in opposing magnetic poles on both sides.

그러나, 피검사체가 복잡한 형상을 갖거나 표면에 다양한 요철부분을 갖는 경우 양측의 자화자극에 의하여 고정된 피검사체의 상부로부터 자분액이 살포된다 하여도 고정되어 있는 피검사체의 하부측의 요입된 형상부분에는 자분액이 묻지 않아 자분액이 묻지 않은 부분에서의 결함탐상이 이루어지지 않는 결점이 있다.However, if the test object has a complicated shape or various irregularities on the surface, the recessed shape on the lower side of the test object fixed even if the magnetic fluid is sprayed from the upper part of the test object fixed by the magnetic stimulation on both sides. There is a drawback that defects cannot be detected in the part which is not stained with magnetic powder because the part is not stained.

이러한 점을 감안하여 작업자가 자화자극에 의하여 고정되어 있는 피검사체 의 전체 표면에 작업자가 일일이 자분액을 균일하게 살포하는 작업을 시행하는 것은 매우 번거로운 일이며 작업능률이 떨어지는 다른 문제점을 야기한다.In view of this, it is very cumbersome for the worker to apply the liquid evenly to the entire surface of the test object fixed by the magnetizing stimulus, which causes another problem of poor work efficiency.

본 고안에 있어서는 종래의 이와 같은 점을 감안하여 안출한 것으로, 복잡한 형상을 갖는 피검사체의 전체 표면에 자분액이 균일하게 살포되어 피검사체의 결함이 정확하게 탐상될 수 있도록 한 자분탐상기를 제공하는데 그 목적이 있다.The present invention has been made in view of such a conventional situation, and provides a magnetic particle flaw detector which allows the magnetic powder to be uniformly sprayed on the entire surface of an inspected object having a complicated shape so that defects of the inspected object can be accurately detected. There is a purpose.

이를 위하여, 본 고안에 있어서는 To this end, in the present invention

본 고안을 첨부도면에 의거하여 보다 상세히 설명하면 다음과 같다.Referring to the present invention in more detail based on the accompanying drawings as follows.

도 1은 본 고안의 자분탐상기의 구조를 전면에서 보인 것이다. 수평프레임(10)의 일측에 수직지지대(12)가 고정입설되어 전면측에 동판전극을 갖는 고정형 자화자극(14)이 착설되고 수평프레임(10)의 타측에는 두 지지판(16)(16')에 연장되고 핸들(18)에 의하여 작동되는 리드스크류(20)가 배치되어 이러한 리드스크류(20)에 의하여 이동하는 이동블록(22)에 수직지지대(24)가 입설되고 이에 상기 고정형 자화자극(14)에 대향하는 가동형 자화자극(26)이 착설된다. 이들 고정형 자화자극(14)과 가동형 자화자극(26) 사이에는 피검사체(28)가 고정된다.Figure 1 shows the structure of the magnetic particle detector of the present invention from the front. The vertical support 12 is fixedly installed on one side of the horizontal frame 10 so that a fixed magnetization magnetic pole 14 having a copper plate electrode is installed on the front side, and two support plates 16 and 16 'are provided on the other side of the horizontal frame 10. A lead screw 20 is disposed on the movable block 22 extending by the handle 18 and operated by the handle 18, and a vertical support 24 is installed in the movable block 22 moved by the lead screw 20. A movable magnetization stimulus 26 opposed to) is installed. The test object 28 is fixed between the fixed magnetization stimulus 14 and the movable magnetization stimulus 26.

도 1에서는 엔진의 피스턴과 크랭크샤프트를 연결하는 연결롯드를 이러한 피검사체(28)의 한 예로 도시하였다. 이러한 피검사체(28)는 복잡한 형상을 갖거나 표면에 다양한 요철부분을 갖는 주조물일 수 있음을 이해할 것이다.In FIG. 1, the connecting rod connecting the piston and the crankshaft of the engine is illustrated as an example of the test object 28. It will be appreciated that such an object 28 may be a casting having a complex shape or having various irregularities on its surface.

자분액은 두 자화자극(14)(26) 사이에는 고정된 피검사체(28)의 상부로부터 살포된다. 이를 위하여 피검사체(28)가 고정되는 두 자화자극(14)(26)의 상부측에 자분액살포관(30)이 배치된다. 이러한 자분액살포관(30)은 예를 들어 공압실린더(32)에 결합되어 두 자화자극(14)(26)의 상부의 살포위치와 두 자화자극(14)(26)의 상부로부터 벗어난 비살포위치로 이동가능하게 되어 있다. 이러한 비살포위치에는 연속살포되는 자분액을 받아 저장통(34)으로 회수하는 회수반(36)이 배치되고 두 자화자극(14)(26)의 하부인 스평프레임(10)의 하측에는 피검사체(28)에 살포되고 남은 잔여 자분액을 회수하기 위한 회수반(38)이 배치되며 이들 회수반(36)(38)은 모두 저장통(34)에 연결되어 있으며 저장통(34)의 자분액은 예를 들어 펌프(도시하지 않았음)를 통하여 자분액살포관(30)으로 공급될 수 있게 되어 있다. Magnetic fluid is sprayed from the top of the subject 28 fixed between the two magnetizing stimuli 14, 26. For this purpose, the magnetic fluid spray tube 30 is disposed on the upper sides of the two magnetizing magnetic poles 14 and 26 to which the test subject 28 is fixed. This magnetic liquid spray tube 30 is coupled to the pneumatic cylinder 32, for example, and sprayed off the top of the two magnetic stimulation (14, 26) and the non-sprayed from the top of the two magnetic stimulation (14, 26) It is movable to the position. In such a non-spraying position, a recovery panel 36 for receiving the magnetic powders to be continuously sprayed and collecting them into the storage container 34 is disposed, and below the horizontal frame 10 which is the lower part of the two magnetizing magnetic poles 14 and 26, 28 is provided with a recovery panel 38 for recovering the remaining remaining magnetic powder, which is connected to the storage container 34, and the magnetic liquid in the storage container 34 is an example. For example, it is possible to be supplied to the magnetic liquid spray pipe 30 through a pump (not shown).

본 고안에 따라서, 피검사체(28)의 전체 표면에 균일하게 자분액을 살포하기 위하여, 두 자화자극(14)(26)을 갖는 수평프레임(10)이 두 자화자극(14)(26)의 수평중심축선을 중심으로 하여 회전될 수 있도록 구성된다.According to the present invention, the horizontal frame 10 having two magnetizing stimuli 14, 26 is applied to the two magnetizing stimuli 14, 26 in order to spread the magnetic liquid evenly over the entire surface of the subject 28. It is configured to be rotated about a horizontal center axis.

이를 위하여, 기대(40)에 두 수직고정대(42)(42')가 착설되고 이들 수직고정대(42)(42')에는 두 자화자극(14)(26)의 수평중심축선이 지나는 위치에 베어링(44)(44')이 착설된다.To this end, two vertical anchors 42, 42 'are mounted on the base 40, and the vertical anchors 42, 42' are mounted at a position where the horizontal center axis of the two magnetizing stimuli 14, 26 passes. 44 and 44 'are installed.

그리고 일측 자화자극(14)이 착설된 수직지지대(12)에 두 자화자극(14)(26)의 수평중심축선과 일치하는 축봉(46)을 연장하고, 수평프레임(10)의 타측, 즉, 자화자극(26)이 배치된 위치의 타측에는 별도의 수직지지판(48)을 착설하여 두 자화자극(14)(26)의 수평중심축선과 일치하는 축봉(50)을 연장한다.In addition, the one side of the magnetized magnetic pole 14 is extended to the vertical support 12, the shaft bar 46 coinciding with the horizontal center axis of the two magnetized magnetic poles 14, 26, the other side of the horizontal frame 10, that is, On the other side of the position where the magnetizing stimulation 26 is disposed, a separate vertical support plate 48 is installed to extend the shaft bar 50 coincident with the horizontal center axis of the two magnetizing stimulation 14, 26.

두 자화자극(14)(26)의 수평중심축선과 일치하는 위치에 배치된 양측의 축 봉(46)(50)은 각각 기대(40)에 착설된 두 수직고정대(42)(42')의 베어링(44)(44')에 연결된다.The shaft rods 46 and 50 on both sides disposed at positions coinciding with the horizontal center axes of the two magnetizing magnetic poles 14 and 26 are respectively formed of the two vertical fixing rods 42 and 42 'mounted on the base 40. To bearings 44 and 44 '.

한편, 두 자화자극(14)(26)과 수평프레임(10)의 조립체를 두 자화자극(14)(26)의 수평중심축선을 중심으로 하여 회전시킬 수 있도록 하기 위하여, 수직지지대(12)에 착설되어 수직고정대(42)의 베어링(44)에 연결된 축봉(46)을 수직고정대(42)의 외측으로 연장하여 이에 회전수단을 착설한다.On the other hand, in order to be able to rotate the assembly of the two magnetizing stimulation (14) 26 and the horizontal frame 10 about the horizontal center axis of the two magnetizing stimulation (14, 26), to the vertical support 12 The shaft rod 46 which is installed and connected to the bearing 44 of the vertical holder 42 extends to the outside of the vertical holder 42 to install the rotating means thereon.

본 고안에 있어서, 이러한 회전수단은 축봉(46)에 착설되는 피니언(52)과 이러한 피니언(52)에 결합되는 래크(54)로 구성되며, 래크(54)는 공압실린더(56)에 의하여 작동된다.In the present invention, this rotating means is composed of a pinion 52 installed on the shaft 46 and a rack 54 coupled to the pinion 52, the rack 54 is operated by the pneumatic cylinder 56 do.

이와 같은 본 고안은 수평프레임(10)상에 배치된 두 자화자극(14)(26) 사이에 피검사체(28)를 고정배치한 다음 이러한 피검사체(28)가 고정된 두 자화자극(14)(26)의 상부측으로 자분액살포관(30)을 이동시켜 자분액이 피검사체(28)의 표면에 살포되도록 한다. 이때에 상부에서 살포되는 자분액이 피검사체(28)의 상부면에 주로 살포되고 측면의 일부와 저면부 등의 표면 일부에 자분액이 도달하지 못하는 것을 해소하기 위하여 피검사체(28)를 회전시켜 자분액이 피검사체(28)의 전체 표면에 균일하게 살포될 수 있도록 한다.The present invention is such that the subject 28 is fixed between the two magnetic stimulation (14, 26) disposed on the horizontal frame 10, and then the two magnetic stimulation (14) in which the subject 28 is fixed The magnetic powder spray tube 30 is moved to the upper side of the 26 to allow the magnetic powder to be sprayed onto the surface of the test object 28. At this time, the magnetic powder sprayed from the upper part is mainly sprayed on the upper surface of the test subject 28, and the test subject 28 is rotated to solve that the magnetic powder cannot reach the surface part such as a part of the side surface and the bottom part. The magnetic powder can be evenly spread on the entire surface of the test object 28.

이를 위하여, 거의 두 자화자극(14)(26)의 수평중심축선상에 배치되는 피검사체(28)를 이러한 두 자화자극(14)(26)의 수평중심축선을 중심으로 하여 일정범위의 각도로 회전시킨다.To this end, the subject 28, which is disposed on the horizontal center axis of the two magnetizing stimuli 14, 26, has a range of angles around the horizontal center axis of the two magnetizing stimuli 14, 26. Rotate

이와 같은 경우, 도 2 및 도 3에서 보인 바와 같이 회전수단을 구성하는 공 압실린더(56)를 작동시켜 래크(54)를 전진시키면 두 자화자극(14)(26)의 수평중심축선상에 배치된 축봉(46)상의 피니언(52)이 회전하면서 이러한 축봉(46)과 이에 대향된 위치에 배치된 축봉(50)이 이들의 중심축선을 중심으로 하여 수직고정대(42)(42')의 베어링(44)(44')에서 회전하여 두 자화자극(14)(26)이 배치된 수평프레임(10)을 회전시킨다. 따라서, 두 자화자극(14)(26) 사이에 고정된 피검사체(28)가 회전하면서 상부로부터 살포되는 자화분이 전체 표면에 균일하게 공급될 수 있도록 하는 것이다.In this case, as shown in FIGS. 2 and 3, when the rack 54 is advanced by operating the pneumatic cylinder 56 constituting the rotating means, the magnetization poles 14 and 26 are disposed on the horizontal center axis. As the pinion 52 on the fixed shaft 46 rotates, such a shaft 46 and the shaft 50 disposed at the position opposite thereto are bearings of the vertical fixing rods 42 and 42 'about their central axis. Rotation at (44) (44 ') rotates the horizontal frame (10) on which the two magnetizing stimuli (14, 26) are arranged. Therefore, the magnetic powder sprayed from the upper part while the test object 28 fixed between the two magnetizing magnetic poles 14 and 26 is rotated can be uniformly supplied to the entire surface.

이후, 피검사체(28)에 균일하게 자분액이 살포된 후에는 두 자화자극(14)(26)이 배치된 수평프레임(10)을 다시 역순으로 회전시킨 다음 피검사체의 자분탐상작업을 시행한다.Subsequently, after the magnetic powder is uniformly sprayed onto the test object 28, the horizontal frame 10 on which the two magnetizing stimuli 14 and 26 are disposed is rotated again in the reverse order, and then magnetic particle examination of the test object is performed. .

이와 같이, 본 고안은 복잡한 형상을 갖는 피검사체의 전체 표면에 자분액이 균일하게 살포되어 피검사체의 결함이 정확하게 탐상될 수 있도록 한 자분탐상기를 제공한다.As described above, the present invention provides a magnetic particle flaw detector that allows the magnetic powder to be uniformly spread on the entire surface of the inspected object having a complicated shape so that defects of the inspected object can be accurately detected.

도 1은 본 고안 자분탐상기의 전체구성을 보인 정면도.1 is a front view showing the overall configuration of the present invention magnetic particle detector.

도 2는 동 측면도.2 is a side view of the same;

도 3은 피검사체의 회전이 이루어질 수 있도록 작동된 것을 보인 측면도.Figure 3 is a side view showing that the operation to be made to rotate the subject.

<도면의 주요부분에 대한 부호설명><Code Description of Main Parts of Drawing>

10: 수평프레임, 14, 26: 자화자극, 28: 피검사체, 30: 자분액살포관, 42, 42': 수직고정대, 44, 44': 베어링, 46, 50: 축봉. 10: horizontal frame, 14, 26: magnetic stimulation, 28: subject under test, 30: self-liquid spray tube, 42, 42 ': vertical fixture, 44, 44': bearing, 46, 50: shaft.

Claims (2)

수평프레임(10)상에 피검사체(28)가 고정되는 고정형 자화자극(14)과 가동형 자화자극(26)이 배치되고 피검사체(28)가 고정되는 두 자화자극(14)(26)의 상부측에 자분액살포관(30)이 배치되는 것에 있어서, 자화자극(14)(26)을 갖는 수평프레임(10)의 조립체가 자화자극(14)(26)의 수평중심축선을 중심으로 하여 회전될 수 있도록 자화자극(14)(26)의 수평중심축선상에서 자화자극(14)(26)을 갖는 수평프레임(10)의 조립체의 양측에 축봉(46)(50)을 배치하여 고정착설되는 수직고정대(42)(42')의 베어링(44)(44')에 축설하고, 일측 축봉(46)에 회전수단을 착설함을 특징으로 하는 자분탐상기.The fixed magnetization stimulus 14 and the movable magnetization stimulus 26 are arranged on the horizontal frame 10 and the two magnetization stimuli 14 and 26 are fixed. In the magnetic liquid spray tube 30 disposed on the upper side, the assembly of the horizontal frame 10 having the magnetizing stimuli 14, 26 is centered on the horizontal center axis of the magnetizing stimulation 14, 26. The shaft rods 46 and 50 are fixedly installed on both sides of the assembly of the horizontal frame 10 having the magnetizing magnetic poles 14 and 26 on the horizontal center axis of the magnetizing magnetic poles 14 and 26 so that they can be rotated. The magnetic particle flaw detector is installed in the bearing (44) (44 ') of the vertical fixing table (42) (42'), and the rotating means is installed on one side rod (46). 제1항에 있어서, 상기 회전수단이 상기 일측 축봉(46)에 착설되는 피니언(52)과 이러한 피니언(52)에 결합되는 래크(54)로 구성되며, 래크(54)가 공압실린더(56)에 의하여 작동됨을 특징으로 하는 자분탐상기.According to claim 1, wherein the rotating means is composed of a pinion (52) mounted on the one shaft (46) and a rack (54) coupled to the pinion (52), the rack (54) is a pneumatic cylinder (56) Magnetic particle detector, characterized in that operated by.
KR2020080009454U 2008-07-16 2008-07-16 Magnetic flaw detector KR20100000814U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103308595A (en) * 2013-05-28 2013-09-18 山东省特种设备检验研究院聊城分院 Tube sheet welding line magnetic defect detector
KR101370878B1 (en) * 2012-10-12 2014-03-12 현진소재주식회사 A magnetic particle testing device with a rotation and a variable support structure of an abject being tested
CN110426449A (en) * 2019-08-01 2019-11-08 捷航设备制造股份有限公司 A kind of line flaw detection double brake beam magnaflux simultaneously

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101370878B1 (en) * 2012-10-12 2014-03-12 현진소재주식회사 A magnetic particle testing device with a rotation and a variable support structure of an abject being tested
CN103308595A (en) * 2013-05-28 2013-09-18 山东省特种设备检验研究院聊城分院 Tube sheet welding line magnetic defect detector
CN103308595B (en) * 2013-05-28 2015-12-16 山东省特种设备检验研究院聊城分院 A kind of panel weld magnetic powder flaw detector
CN110426449A (en) * 2019-08-01 2019-11-08 捷航设备制造股份有限公司 A kind of line flaw detection double brake beam magnaflux simultaneously

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