KR0126861B1 - The jig for measuring elasticity of a ring - Google Patents

The jig for measuring elasticity of a ring

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Publication number
KR0126861B1
KR0126861B1 KR1019940027845A KR19940027845A KR0126861B1 KR 0126861 B1 KR0126861 B1 KR 0126861B1 KR 1019940027845 A KR1019940027845 A KR 1019940027845A KR 19940027845 A KR19940027845 A KR 19940027845A KR 0126861 B1 KR0126861 B1 KR 0126861B1
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KR
South Korea
Prior art keywords
jig
elastic force
testing
center
jaws
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Application number
KR1019940027845A
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Korean (ko)
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KR960014900A (en
Inventor
한종현
Original Assignee
김태구
대우자동차주식회사
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Application filed by 김태구, 대우자동차주식회사 filed Critical 김태구
Priority to KR1019940027845A priority Critical patent/KR0126861B1/en
Publication of KR960014900A publication Critical patent/KR960014900A/en
Application granted granted Critical
Publication of KR0126861B1 publication Critical patent/KR0126861B1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/16—Elements for restraining, or preventing the movement of, parts, e.g. for zeroising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

Disclosed is a jig for testing an elastic force of an annular member which can easily and precisely measure the elastic force of the annular member. The jig comprises a chuck(50) having a plurality of jaws(10, 11 and 12) which are radially disposed in such a manner that they can be closed or remote to each other about a center(C), a plurality of rod cells(20, 30 and 40) installed on jaws(10, 11 and 12) such that measuring portions(21, 31 and 41) thereof extend toward center(C), a locking means(60) for locking fixing portions(22, 32 and 42) of rod cells(20, 30 and 40) and a plurality of pulling members(26, 36 and 46) fixedly installed on measuring portions(21, 31 and 41) of rod cells(20, 30 and 40) and having a locking portion(25, 35 and 45) which are locked at an inner periphery side of an annular member(70).

Description

환체의 탄성력 테스트용 지그Jig for testing elasticity of the ring

제1도는 본 발명에 따른 환체의 분해사시도.1 is an exploded perspective view of a ring according to the present invention.

제2도는 본 발명에 따른 환체의 사용상태를 보이는 평면도이다.2 is a plan view showing a state of use of the ring according to the invention.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10,11,12 : 조오(JAW)21,31,41 : 측정단10,11,12: JAW 21,31,41: Measuring stage

22,32,42 : 고정단23,33,43 : 외측단부22, 32, 42: fixed end 23, 33, 43: outer end

24,34,44 : 고정부재24a,34a,44a : 관통구멍24, 34, 44: fixing member 24a, 34a, 44a: through hole

25,35,45 : 걸림면26,36,46 : 당김쇠25,35,45: Hanging surface 26,36,46: Pull

27,37,47 : 볼트50 : 연동척27,37,47: Bolt 50: Interlock chuck

60 : 체결수단70 : 환체60: fastening means 70: ring

71 : 내주면C : 중심71: inner circumference C: center

본 발명은 환체의 탄성력 테스트용 지그에 관한 것으로, 특히 연동척의 조오(JAW)에 로드셀(Load Cell)을 설치하고 그 끝단에 환체의 일종인 스프링클램프를 걸어서 조오(JAW)를 방사방향으로 조이거나 풀므로써 로드셀로부터 출력되는 전기적인 값을 읽어서 환체의 탄성력을 측정할 수 있도록 해주는데 사용되는 환체의 탄성력 테스트용 지그에 관한 것이다.The present invention relates to a jig for testing the elastic force of the ring, in particular, the load cell (JAW) of the interlocking chuck is installed and the jaw (Jaw) is radially tightened by hanging a spring clamp, which is a kind of ring at the end thereof. The present invention relates to a jig for testing the elastic force of a ring used to measure the elastic force of the ring by reading an electrical value output from the load cell.

일반적으로 부품류는 사용자에게 이 부품에 대한 구체적인 수명데이타를 알려주고 불량의 여부를 판별하기 위해 시험을 거친다.In general, parts are tested to inform the user of the specific life data of the part and to determine whether they are defective.

그중 환체(環體)의 일종인 스프링클램프는 변위량에 따른 탄성력이 어느 정도 되는가를 알아야 호스(도시않됨) 등에 물어서 설치될때 호스(도시않됨)에 작용시켜야 하는 적절한 가압력을 가진 스프링클램프를 선택하여 사용할 수 있게 된다.Among them, the spring clamp, which is a kind of ring body, needs to know how much elastic force according to the displacement amount, so it is necessary to select a spring clamp with appropriate pressing force to act on the hose (not shown) when it is installed by biting a hose (not shown). It becomes possible.

그러나 종래에 스프링클램프의 탄성력을 테스트하는 장비는 단순히 스프링클램프의 일측을 고정시키고 타측에서 한개의 로드셀을 이용하여 손으로 당기면서 측정하는 방법을 취하고 있으므로 스프링클램프의 전체 협지면에 걸쳐서 작용하는 탄성력의 측정은 불가능하였으며, 한지점만을 측정하므로 부정확한 데이타가 산출되는 문제점이 있었다.However, the conventional equipment for testing the spring force of the spring clamp simply measures one side of the spring clamp and pulls it by hand using one load cell on the other side. Therefore, the elastic force acting over the entire clamping surface of the spring clamp is applied. It was impossible to measure and there was a problem that incorrect data was calculated because only one point was measured.

본 발명은 상기한 바와 같은 제반 문제점들을 해소하고자 안출한 것으로 탄성을 가진 환체를 걸고 여러점에선 동일한 측정조건하에 이 환체를 당기거나 놓을 수 있으면서 동시에 측정데이타를 출력할 수 있는 환체의 탄성력 테스트용 지그를 제공하려는데 그 목적이 있다.The present invention has been made to solve the problems described above, and the jig for testing the elastic force of the ring that can be pulled or placed at the same time under the same measuring conditions while outputting the measurement data at the same time under the same measuring conditions The purpose is to provide.

이러한 본 발명의 목적을 달성하기 위하여 환체의 탄성력을 테스트하기 위한 환체의 탄성력 테스트용 지그에 있어서, 중심을 향해 동시에 서로 멀어지거나 가까워지면서 방사모양으로 연동되는 복수개의 조오를 가진 연동척의 각 조오상에 복수개의 로드셀의 각 측정단이 상기 중심을 향하도록 이 로드셀의 고정단을 체결수단에 의해 설치하고, 이 로드셀의 각 측정단에는 상기 중심으로부터 각각 동일거리를 이루면서 상기 환체의 내주면에 걸리는 걸림면을 가진 복수개의 당김쇠를 각각 고정설치하여 환체의 탄성력 테스트용 지그가 제공된다.In the jig for testing the elastic force of the ring to test the elastic force of the ring to achieve the object of the present invention, each jaw of the interlocking chuck having a plurality of jaws interlocked in a radial shape while moving toward or away from each other toward the center at the same time A fixed end of the load cell is provided by a fastening means so that each measuring end of the plurality of load cells faces the center, and each measuring end of the load cell is provided with a locking surface that is engaged with the inner circumferential surface of the ring while forming the same distance from the center. A plurality of pulleys are fixed and provided to provide a jig for testing the elastic force of the ring.

이하 본 발명에 따른 환체의 탄성력 테스트용 지그의 실시예를 첨부도면을 참조하여 상세히 설명한다.Hereinafter, an embodiment of an elastic force test jig of a ring according to the present invention will be described in detail with reference to the accompanying drawings.

제1도 및 제2도는 본 발명에 따른 지그의 실시예를 나타내는 분해사시도 및 평면도로서, 이에 도시한 바와 같이 중심(C)을 향해 동시에 서로 멀어지거나 가까워지면서 방사모양으로 연동되는 복수개의 조오(10)(11)(12)를 가진 연동척(50)의 조오(10)(11)(12)상에 복수개의 로드셀(20)(30)(40)의 각 측정단(21)(31)(41)이 상기 중심(C)을 향하도록 이 로드셀(20)(30)(40)의 고정단(22)(32)(42)을 체결수단(60)에 의해 설치되고, 이 로드셀(20)(30)(40)의 각 측정단(21)(31)(41)에는 상기 중심(C)으로부터 각각 동일거리를 이루면서 환체(70)의 내주면(71)에 걸리는 걸림면(25)(35)(45)을 가진 복수개의 당김쇠(26)(36)(46)를 각각 고정설치하여 구성하였다.1 and 2 are an exploded perspective view and a plan view showing an embodiment of a jig according to the present invention, as shown therein a plurality of jaws (10) interlocked in a radial shape while moving toward or away from each other toward the center (C) at the same time. Each measuring stage 21, 31, of a plurality of load cells 20, 30, 40 on jaws 10, 11, 12 of the peristaltic chuck 50 having 11, 12. The fixed ends 22, 32 and 42 of the load cells 20, 30 and 40 are installed by the fastening means 60 so that the 41 faces the center C. The load cell 20 Each of the measurement stages 21 and 31 and 41 of the 30 and 40 engaging surfaces 25 and 35 which are engaged with the inner circumferential surface 71 of the annular body 70 at the same distance from the center C, respectively. A plurality of pulls (26) (36) and (46) having (45) were fixed to each other.

여기서 상기 걸림면(25)(35)(45)은 상기 환체(70)의 내주면(71)에 선접촉 또는 점접촉되도록 그 형상을 볼록곡면 형태로 구성하였다.Here, the engaging surfaces 25, 35 and 45 are configured in the form of convex curved surfaces so as to be in line contact or point contact with the inner circumferential surface 71 of the annular body 70.

그리고 상기 연동척(50)은 일반적인 수평형 선반의 주축에 설치하여 사용하는 수동작동형 연동척을 사용하였다.And the interlock chuck 50 used a manually operated interlock chuck installed on the main shaft of a general horizontal lathe.

상기 로드셀(20)(30)(40)은 통상적인 것으로써 원통형의 몸체(20a)(30a)(40a) 양측단에 측정물 또는 시험물에 결합되는 측정단(21)(31)(41)과, 이 몸체(20a)(30a)(40a)를 고정하기 위한 고정단(22)(32)(42)이 형성되어 있고, 이 측정단(21)(31)(41)에는 숫나사(51)가 일체로 돌설되어 있으며 고정단(22)(32)(42)에는 나사구멍(52)이 형성되어 있고, 상기 몸체(20a)(30a)(40a)의 일측에는 커넥터부(53)(54)(55)가 마련되어 있어서, 상기 측정단(21)(31)(41)에 연결되어 당겨지는 환체(70)의 탄성력이 전기적인 신호로 바뀌어 이 커넥터부(53)(54)(55)를 통해서 외부기기(도시않됨)과 접속되도록 구성되어 있다.The load cells 20, 30 and 40 are conventional, and measuring stages 21, 31 and 41 coupled to the workpiece or the test article at both ends of the cylindrical bodies 20a, 30a and 40a. And fixed ends 22, 32, 42 for fixing the bodies 20a, 30a, 40a, and male screws 51 on the measuring ends 21, 31, 41. Is integrally protruded, and screw holes 52 are formed in the fixed ends 22, 32 and 42, and connector portions 53 and 54 on one side of the bodies 20a, 30a and 40a. 55 is provided so that the elastic force of the ring 70, which is connected to the measuring stages 21, 31 and 41, is converted into an electrical signal through the connector parts 53, 54 and 55. It is configured to be connected to an external device (not shown).

한편, 상기 체결수단(60)은 상기 각 조오(10)(11)(12)의 외측단부(23)(33)(43)에 고정부재(24)(34)(44)를 각각 입설하고, 이 고정부재(24)(34)(44)의 일측에 상기 중심(C)을 향하는 관통구멍(24a)(34a)(44a)을 형성하여 상기 각 로드셀(20)(30)(40)의 고정단(22)(32)(42)을 이 관통구멍(24a)(34a)(44a)에 끼우고 볼트(27)(37)(47)에 의해 체결하여 구성하였다.On the other hand, the fastening means 60 is installed in the outer end portions 23, 33, 43 of the jaws 10, 11, 12, respectively, the fixing members 24, 34, 44, respectively, On one side of the fixing members 24, 34, 44, through holes 24a, 34a, 44a facing the center C are formed to fix the load cells 20, 30, 40. The ends 22, 32 and 42 were inserted into these through holes 24a, 34a and 44a and fastened by bolts 27, 37 and 47.

상기 고정부재(24)(34)(44)는 직육면체 모양을 하고 있으며, 하단부에는 직각턱(24b)(34b)(44b)이 마련되어 있어서 이 직각턱(24b)(34b)(44b)을 이용하여 상기 조오(10)(11)(12)의 외측단부(23)(33)(43) 상단 모서리(23a)(33a)(43a)에 밀착시킴으로써 조립이 간편하도록 하였으며, 이 고정부재(24)(34)(44)와 상기 조오(10)(11)(12)의 결합은 이 고정부재(24)(34)(44)로부터 체결볼트(57)(58)를 관통시켜 상기 조오(10)(11)(12)에 나사결합되도록 하여 둘을 결합한 것이다.The fixing members 24, 34 and 44 have a rectangular parallelepiped shape, and at the lower end, right angled jaws 24b, 34b and 44b are provided to use the right angled jaws 24b, 34b and 44b. The outer end portions 23, 33, 43 of the jaws 10, 11, 12 are in close contact with the upper edges 23a, 33a, 43a for easy assembly, and the fixing members 24 ( The coupling of the jaws 10, 11 and 12 through the fastening bolts 57 and 58 passes through the fixing bolts 24, 34 and 44. 11) (12) to be screwed together to combine the two.

상기 당김쇠(26)(36)(46)는 상기 로드셀(20)(30)(40)의 측정단(21)(31)(41)에 마련되어 있는 숫나사(51)가 끼워져서 나사결합될 수 있는 암나사부(67)가 마련되어 있는 수평고정부재(75)(76)(77)와, 상기한 걸림면(25)(35)(45)을 가지는 걸림부재(85)(86)(87)로 구성되어 있으며, 상기 수평고정부재(75)(76)(77)와 걸림부재(85)(86)(87)는 서로 맞대어져 복수의 볼트(88)(89)에 의해 나사결합되어 있다.The pulleys 26, 36 and 46 can be screwed in by inserting a male screw 51 provided in the measurement stages 21, 31 and 41 of the load cells 20, 30 and 40. To the locking members 85, 86 and 87 having the horizontal fixing members 75, 76 and 77 provided with the female threaded part 67 and the locking surfaces 25, 35 and 45 described above. The horizontal fixing members 75, 76, 77 and the engaging members 85, 86, 87 are butted together and screwed together by a plurality of bolts 88,89.

또한, 상기 걸림부재(85)(86)(87)는 평편모양의 받침부(90)(91)(92)의 끝단에 환봉형태의 걸림돌기(93)(94)(95)를 직상방으로 돌설하여 이 걸림돌기(93)(94)(95)의 일면이 상기 걸림면(25)(35)(45)이 되도록 구성하였다.In addition, the engaging members (85, 86, 87) is a round bar-shaped locking projections (93, 94, 95) at the ends of the flat-shaped support portion (90, 91, 92) to the top It was constructed so that one surface of the locking projections 93, 94 and 95 is the locking surfaces 25, 35 and 45.

도면중 미설명 부호 97은 상기 볼트(27)(37)(47)의 풀림을 방지하기 위한 스프링와셔를 나타낸 것이며, 50a는 상기 연동척(50)에 형성된 조오조정부를 나타낸 것이고, 99는 상기 각 로드셀(20)(30)(40)에 접속된 신호선을 나타낸 것이다.In the drawing, reference numeral 97 denotes a spring washer for preventing loosening of the bolts 27, 37 and 47, 50a denotes a jaw adjustment part formed on the linkage chuck 50, and 99 denotes each angle. Signal lines connected to the load cells 20, 30 and 40 are shown.

이상에서와 같은 본 발명의 실시예에 따른 작용·효과를 설명한다.The operation and effect according to the embodiment of the present invention as described above will be described.

환체(70)인 스프링클램프의 탄성력을 측정하려고 할 경우에 먼저 이 환체(70)의 내주면(71)에 각 걸림부재(85)(86)(87)에 형성된 걸림돌기(93)(94)(95)의 걸림면(25)(35)(45)이 접촉할 수 있도록 연동척(50)의 조오조정부(50a)를 회전시켜 조오(10)(11)(12)를 연동척(50)의 중심(C)으로 모으면서 이 조오(10)(11)(12)가 상기 환체(70)의 내주면(71)의 내경 크기보다 상기 각 걸림면(25)(35)(45)에 모두 외접하는 외접원의 직경이 작게 되었을 때 이 환체(70)를 걸림돌기(93)(94)(95)에 끼우게 되며, 받침부(90)(91)(92)에 의해 지지된 상태로 있게 된다.In the case of trying to measure the elastic force of the spring clamp which is the ring body 70, first, the locking protrusions 93 and 94 are formed on the respective engaging members 85, 86 and 87 on the inner circumferential surface 71 of the ring body 70. The jaws 10, 11, 12 of the interlocking chuck 50 are rotated by rotating the jaw adjusting unit 50a of the interlocking chuck 50 so that the engaging surfaces 25, 35, 45 of the 95 may contact each other. The jaws 10, 11, 12 are circumscribed to each of the engaging surfaces 25, 35, 45 more than the inner diameter of the inner circumferential surface 71 of the annulus 70 while being collected at the center C. When the diameter of the circumscribed circle becomes small, the annular body 70 is fitted to the engaging protrusions 93, 94, 95, and is supported by the supporting parts 90, 91, 92.

이 상태에서 연동척(50)의 조오조정부(50a)를 처음과는 반대방향으로 회전시키게 되면, 각 조오(10)(11)(12)가 중심(C)에서 부터 멀어지면서 환체(70)인 스프링클램프를 외측으로 당기게 된다.In this state, when the jaw adjustment unit 50a of the linkage chuck 50 is rotated in the opposite direction to the first, each jaw 10, 11, 12 is moved away from the center C, and the ring 70 is rotated. The spring clamp is pulled outward.

이때 스프링클램프는 탄성반력을 갖게 되며, 동시에 로드셀(20)(30)(40)의 측정단(21)(31)(41)도 당겨지게 된다.At this time, the spring clamp has an elastic reaction force, and at the same time, the measuring ends 21, 31 and 41 of the load cells 20, 30 and 40 are also pulled out.

상기와 같은 작용에 의해 로드셀(20)(30)(40)의 각 커넥터부(53)(54)(55)에 접속된 신호선(99)에는 전기적인 신호값이 출력되어 표시기(도시않됨)에 입력되며, 이 표시기(도시않됨)는 시각적인 기호로써 측정자에게 알려주게 된다.By the above-described action, an electric signal value is output to the signal line 99 connected to each of the connector parts 53, 54, 55 of the load cells 20, 30, 40, to an indicator (not shown). This indicator (not shown) informs the operator as a visual symbol.

이상에서와 같은 본 발명은 스프링클램프와 같은 환체의 탄성력 측정을 여러지점에서 동시에 할 수 있으므로 산출되는 탄성력이 정확하게 되며, 측정시 연동척의 조오를 조정하는 것만으로 측정이 가능하므로 측정시의 불편을 덜 수 있는 효과가 있는 것이다.As described above, the present invention can measure the elastic force of the annular body such as a spring clamp at several points at the same time, so that the calculated elastic force is accurate, and it is possible to measure only by adjusting the jaw of the interlock chuck during measurement, thereby reducing the inconvenience of measuring. It can be effective.

Claims (3)

환체의 탄성력을 테스트하기 위한 환체의 탄성력 테스트용 지그에 있어서, 중심(C)을 향해 동시에 서로 멀어지거나 가까워지면서 방사모양으로 연동되는 복수개의 조오(10)(11)(12)를 가진 연동척(50)의 각 조오(10)(11)(12)상에 복수개의 로드셀(20)(30)(40)의 각 측정단(21)(31)(41)이 상기 중심(C)을 향하도록 이 로드셀(20)(30)(40)의 고정단(22)(32)(42)을 체결수단(60)에 의해 설치하고, 이 로드셀(20)(30)(40)의 각 측정단(21)(31)(41)에는 상기 중심(C)으로부터 각각 동일거리를 이루면서 상기 환체(70)의 내주면(71)에 걸리는 걸림면(25)(35)(45)을 가진 복수개의 당김쇠(26)(36)(46)를 각각 고정설치하여 구성한 것을 특징으로 하는 환체의 탄성력 테스트용 지그.In the jig for testing the elastic force of the annular body for testing the elastic force of the annular, the interlocking chuck having a plurality of jaws (10) (11) (12) that are radially interlocked while moving toward or away from each other toward the center (C) at the same time ( On each jaw 10, 11, 12 of 50, each measurement stage 21, 31, 41 of the plurality of load cells 20, 30, 40 faces the center C. The fixed ends 22, 32 and 42 of the load cells 20, 30 and 40 are installed by the fastening means 60, and the respective measuring ends of the load cells 20, 30 and 40 are 21, 31, and 41 have a plurality of pulls having engaging surfaces 25, 35, 45, which are engaged with the inner circumferential surface 71 of the annular body 70 at the same distance from the center C, respectively. 26) (36) (46) jig for testing the elastic force of the annular body, characterized in that the fixed configuration. 제1항에 있어서, 상기 걸림면(25)935)(45)의 볼록곡면인 것을 특징으로 하는 환체의 탄성력 테스트용 지그.The jig for testing the elastic force of the annular body according to claim 1, which is a convex curved surface of the engaging surfaces (25, 935) (45). 제1항에 있어서, 상기 체결수단(60)은 상기 각 조오(10)(11)(12)의 외측단부(23)(33)(43)에 고정부재(24)(34)(44)를 각각 입설하고, 이 고정부재(24)(34)(44)의 일측에 상기 중심(C)을 향하는 관통구멍(24a)(34a)(44a)을 형성하여 상기 각 로드셀(20)(30)(40)의 고정단(22)(32)(42)을 이 관통구멍(24a)(34a)(44a)에 끼우고 볼트(27)(37)(47)에 의해 체결하여 구성한 것을 특징으로 하는 환체의 탄성력 테스트용 지그.The fastening means (60) according to claim 1, wherein the fastening means (60) is provided with fixing members (24) (34) (44) at the outer ends (23) (33) (43) of the jaws (10) (11) (12). Each of the load cells 20 and 30 is formed by forming a through hole 24a, 34a, 44a toward the center C on one side of the fixing members 24, 34, 44, respectively. The fixed end 22, 32, 42 of the 40 is inserted into the through holes 24a, 34a, 44a and fastened by bolts 27, 37, 47. Jig for testing elasticity
KR1019940027845A 1994-10-28 1994-10-28 The jig for measuring elasticity of a ring KR0126861B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101527692B1 (en) * 2014-11-03 2015-06-09 주식회사 오르비텍 Fixation jig of gamma-ray irradiation apparatus for calibration
KR20160057029A (en) * 2014-11-12 2016-05-23 (주)동아금속 Hose clamp test device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240053892A (en) * 2022-10-18 2024-04-25 주식회사 아모그린텍 Porous metal structures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101527692B1 (en) * 2014-11-03 2015-06-09 주식회사 오르비텍 Fixation jig of gamma-ray irradiation apparatus for calibration
KR20160057029A (en) * 2014-11-12 2016-05-23 (주)동아금속 Hose clamp test device

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