KR20020095373A - A tighten up bolt checkup device and method for the same - Google Patents

A tighten up bolt checkup device and method for the same Download PDF

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KR20020095373A
KR20020095373A KR1020010033571A KR20010033571A KR20020095373A KR 20020095373 A KR20020095373 A KR 20020095373A KR 1020010033571 A KR1020010033571 A KR 1020010033571A KR 20010033571 A KR20010033571 A KR 20010033571A KR 20020095373 A KR20020095373 A KR 20020095373A
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bolt
heat
ultrasonic wave
ultrasonic
generating area
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KR1020010033571A
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Korean (ko)
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공이택
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현대자동차주식회사
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Publication of KR20020095373A publication Critical patent/KR20020095373A/en

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    • 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
    • G01N29/04—Analysing solids
    • G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
    • 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
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02881—Temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/269—Various geometry objects
    • G01N2291/2691—Bolts, screws, heads

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

PURPOSE: An apparatus and method is provided to achieve improved productivity and workability by automating procedures for testing bolt coupling, while obtaining product with improved performance. CONSTITUTION: An apparatus for testing bolt coupling, comprises an ultrasonic oscillation unit(30) for emitting ultrasonic wave to the bolt coupled portion; and a thermal sensing unit(40) for determining whether a bolt(50) is coupled or not, by detecting the heat which is generated from the bolt coupled portion by the ultrasonic wave emitted from the ultrasonic oscillation unit. The thermal sensing unit includes a camera(41) for detecting heat, and a comparison and determination section(42) for determining whether the bolt is completely coupled or not, through the comparison between the preset value and the heat area detected by the camera.

Description

볼트 체결 검사 장치 및 그 방법{ A tighten up bolt checkup device and method for the same }A tighten up bolt checkup device and method for the same}

본 발명은 볼트 체결 검사 장치 및 그 방법에 관한 것으로서, 특히 볼트의 완전 체결 여부를 자동으로 검사하도록 하는 볼트 체결 검사 장치 및 그 방법에 관한 것이다.The present invention relates to a bolt fastening inspection apparatus and a method thereof, and more particularly to a bolt fastening inspection apparatus and method for automatically checking whether the bolt is fully fastened.

일반적으로 생산라인에서는 볼트 체결 작업의 경우 주요 공정에서 볼트를 가체결한 후 후공정에서 완전 체결 및 토크 확인 공정을 거친다.In general, in the production line, bolt fastening works after pre-fastening bolts in the main process, and then complete fastening and torque checking in the later process.

도1 은 종래의 기술에 의한 볼트 체결 검사 장치가 도시된 구성도이다.1 is a block diagram showing a bolt fastening inspection apparatus according to the prior art.

종래의 경우에는 토크 렌치(10)의 볼트 조임부 내부에 잉크를 묻힌 스탬프(11)를 삽입하고 상기 토크 렌치(10)를 상기 볼트(20)에 끼워넣어 볼트(20)에 잉크가 마킹되면 상기 볼트(20)가 완전히 체결되는 것으로 판단하였다.In the conventional case, a stamp 11 embedded with ink is inserted into the bolt tightening part of the torque wrench 10, and the torque wrench 10 is inserted into the bolt 20 so that the ink is marked on the bolt 20. It was determined that the bolt 20 is completely fastened.

그러나, 상기 방법은 수작업으로 볼트의 체결 검사가 행해지기 때문에 볼트의 완전 체결 여부가 부정확하게 판단되어 볼트가 가체결된 상태로 제품이 출하되는 경우가 빈번히 발생 하였을뿐만 아니라, 볼트의 완전 체결 여부를 검사하는데 많은 시간과 인력이 소요되어 작업성 및 생산성이 저감되는 문제점이 있다.However, in the above method, since the bolts are manually inspected, the bolts are incorrectly judged to be inaccurate and the product is often shipped with the bolts pre-tightened. It takes a lot of time and manpower to inspect, there is a problem that workability and productivity is reduced.

최근에는 초음파에 의하여 상기 볼트가 받는 스트레스를 측정하여 상기 스트레스가 기준치 이하인 경우 볼트가 완전 체결되지 아니한 것으로 판단하는 검사방법이 개발되었다.Recently, a test method for measuring the stress received by the bolt by ultrasonic and determining that the bolt is not fully tightened when the stress is less than the reference value has been developed.

그러나, 상기와 같은 방법은 볼트와 초음파 발생장치의 간격에 따라 측정되는 스트레스 값의 변동이 매우 크기 때문에 볼트에 초음파 발생장치를 정확히 접촉시켜야 하므로 생산라인에서 상기 초음파 장치를 정확한 위치에 고정시킬수 있는 별도의 장치를 필요로 하는 문제점이 있다.However, the above method requires a very accurate change of the stress value measured according to the distance between the bolt and the ultrasonic generator, so that the ultrasonic generator must be correctly contacted with the bolt, so that the ultrasonic apparatus can be fixed at the correct position in the production line. There is a problem that requires the device.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 간편한 방법으로 볼트의 체결여부를 정밀하게 검사할 수 있는 볼트 체결 검사 장치 및 그 방법을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems of the prior art, and an object of the present invention is to provide a bolt fastening inspection apparatus and method capable of precisely inspecting the fastening of the bolt in a simple manner.

본 발명의 다른 목적은 볼트 체결 여부 검사를 자동화하여 생산성 및 작업성을 향상시킬수 있는 볼트 체결 검사장치 및 그 방법을 제공하는데 있다.Another object of the present invention to provide a bolt fastening inspection apparatus and method that can improve the productivity and workability by automating the bolt fastening inspection.

도1 은 종래 기술에 의한 볼트 체결 검사 장치가 도시된 구성도,1 is a block diagram showing a bolt fastening inspection apparatus according to the prior art,

도2 는 본 발명에 의한 볼트 체결 검사 장치가 도시된 블럭도,2 is a block diagram showing a bolt fastening inspection apparatus according to the present invention;

도3 은 본 발명에 의한 볼트 체결 검사 장치가 도시된 구성도,Figure 3 is a block diagram showing a bolt fastening inspection apparatus according to the present invention,

도4 는 본 발명에 의한 볼트 체결 검사 방법이 도시된 순서도이다.Figure 4 is a flow chart illustrating a bolt fastening inspection method according to the present invention.

<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>

30: 초음파 발진부40: 열감지부30: ultrasonic oscillation unit 40: heat detection unit

41: 카메라42: 비교 판단부41: camera 42: comparison judgment unit

50: 볼트50: bolts

상기한 과제를 해결하기 위한 본 발명에 의한 볼트 체결 검사 장치에 따르면, 볼트가 체결된 부위에 초음파를 발사하는 초음파 발진부와, 상기 초음파 발진부에서 발사된 초음파에 의한 상기 볼트 체결 부위에서 발생된 열을 감지하는 열감지부로 구성된다.According to the bolt fastening inspection apparatus according to the present invention for solving the above problems, the ultrasonic wave oscillation unit for firing the ultrasonic wave to the site where the bolt is fastened, and the heat generated from the bolt fastening portion by the ultrasonic wave emitted from the ultrasonic oscillation unit It consists of a heat sensing unit.

이하, 본 발명의 바람직한 실시 예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도2 는 본 발명에 의한 볼트 체결 검사 장치가 도시된 블럭도이고, 도3 은 본 발명에 의한 볼트 체결 검사 장치가 도시된 구성도이다.Figure 2 is a block diagram showing a bolt fastening inspection apparatus according to the present invention, Figure 3 is a block diagram showing a bolt fastening inspection apparatus according to the present invention.

본 발명에 의한 볼트 체결 검사 장치는 볼트(50)가 체결된 부위에 초음파를 발사하여 상기 볼트(50)의 체결 부위에 열을 발생시키는 초음파 발진부(30)와, 상기 초음파 발진부(30)에서 발사된 초음파에 의한 상기 볼트의(50) 체결 부위에서 발생된 열을 감지하는 열감지부(40)로 구성된다.The bolt fastening inspection apparatus according to the present invention emits an ultrasonic wave to a portion where the bolt 50 is fastened to generate an ultrasonic wave at the fastening portion of the bolt 50, and the ultrasonic wave oscillating portion 30. It consists of a heat detection unit 40 for detecting the heat generated in the fastening portion of the bolt 50 by the ultrasonic wave.

상기 초음파 발진부(30)는 상기 볼트(50)의 체결 정도에 따라 다른 열발생면적을 발생시킨다. 즉, 상기 볼트(50)가 완전 체결 되지 아니한 경우 상기 볼트(50)와 상기 볼트(50)가 결합된 대상물(51)사이에 갭(52)이 발생하게 된다.The ultrasonic oscillator 30 generates different heat generating areas according to the fastening degree of the bolt 50. That is, when the bolt 50 is not completely fastened, a gap 52 is generated between the bolt 50 and the object 51 to which the bolt 50 is coupled.

이때, 상기 갭(52) 사이에서 상기 초음파 발진부(30)에서 발사된 초음파가 진동하여 열이 발생하게 되며, 상기 갭의 크기에 따라 열발생면적이 다르게 된다.At this time, the ultrasonic wave emitted from the ultrasonic wave oscillator 30 vibrates between the gaps 52 to generate heat, and the heat generating area varies according to the size of the gap.

한편, 상기 열감지부(40)는 열을 감지하는 카메라(41)로 구성되고, 상기 카메라(41)에서 감지된 열발생면적을 소정의 설정치와 비교하여 상기 볼트(50)의 완전 체결 여부를 판단하는 비교판단부(42)를 포함한다.On the other hand, the heat detection unit 40 is composed of a camera 41 for sensing the heat, and compares the heat generation area detected by the camera 41 with a predetermined set value to determine whether the bolt 50 is fully fastened Comparing determination portion 42 is included.

상기와 같이 구성된 본 발명의 동작을 살펴보면 다음과 같다.Looking at the operation of the present invention configured as described above are as follows.

도4 는 본 발명에 의한 볼트 체결 검사 장치 동작 방법이 도시된 순서도이다.4 is a flowchart illustrating a method of operating a bolt fastening test apparatus according to the present invention.

먼저, 상기 초음파 발진부(30)에서 상기 볼트(50)의 체결 부위에 초음파를 발사한다.(S1 참조)First, the ultrasonic wave oscillator 30 emits ultrasonic waves to a fastening portion of the bolt 50. (See S1)

상기 발생된 초음파에 의해 상기 볼트(50)의 체결 부위에서 발생되는 열발생면적을 상기 카메라(41)에서 감지하여 소정의 설정치가 저장되어 있는 상기 비교 판단부(42)로 전송한다.(S2 및 S3 참조)The heat generating area generated at the fastening portion of the bolt 50 is detected by the generated ultrasonic wave by the camera 41 and transmitted to the comparison determination unit 42 in which a predetermined set value is stored. See S3)

상기 전송된 열발생면적은 상기 비교 판단부(42)에 저장되어 있는 소정의 설정치와 비교되어 열발생면적이 소정의 설정치보다 낮은 경우 체결 상태 양호를 통보한다.(S4 및 S5 참조)The transmitted heat generating area is compared with a predetermined set value stored in the comparison determining unit 42, and when the heat generating area is lower than the predetermined set value, the fastening state is notified (see S4 and S5).

만일, 상기 전송된 열발생면적이 상기 소정의 설정치 이상인 경우 완전 체결되지 아니한 것으로 판단되어 체결 상태 불량을 통보하고, 이에 따라 볼트를 완전히 체결한다.(S6 참조)If the transmitted heat generation area is equal to or greater than the predetermined value, it is determined that it is not completely tightened, and a failure of the fastening state is notified, and accordingly, the bolt is fully tightened.

상기와 같이 구성되는 본 발명의 볼트 체결 검사 장치는 볼트의 체결 검사 공정을 자동화함으로써 공정이 축소되어 단시간에 볼트 체결을 검사할 수 있기 때문에 생산성 및 작업성이 향상되고, 볼트 완전 체결 작업이 누락되어 볼트가 가체결된 상태로 제품이 출하되는 것이 사전에 방지되므로 제품의 성능향상을 기대할 수 있는 효과가 있다.The bolt fastening inspection apparatus of the present invention configured as described above can reduce the process by automating the fastening inspection process of the bolt, so that the fastening of the bolt can be inspected in a short time, thereby improving productivity and workability, and completely eliminating bolt work. Since the product is prevented from being shipped with the bolts pre-tightened in advance, the performance of the product can be expected to be improved.

Claims (4)

볼트가 체결된 부위에 초음파를 발사하는 초음파 발진부와; 상기 초음파 발진부에서 발사된 초음파에 의한 상기 볼트 체결 부위에서 발생된 열을 감지하여 볼트의 체결 여부를 판별하는 열감지부로 구성된 것을 특징으로 하는 볼트 체결 검사 장치.Ultrasonic oscillation unit for emitting an ultrasonic wave to the bolted portion; And a heat sensing unit configured to determine whether the bolt is fastened by sensing heat generated at the bolt fastening site by the ultrasonic wave emitted from the ultrasonic wave oscillator. 제1 항에 있어서,According to claim 1, 상기 열감지부는 열을 감지하는 카메라인 것을 특징으로 하는 볼트 체결 검사 장치.The heat detection unit bolt fastening inspection device, characterized in that the camera for sensing the heat. 제2 항에 있어서,The method of claim 2, 상기 열감지부는 상기 카메라에서 감지된 열발생면적을 소정의 설정치와 비교하여 상기 열발생면적이 소정의 설정치 이상이면 상기 볼트가 완전 체결되지 않은 것으로 판단하는 비교 판단부를 포함하여 구성된 것을 특징으로 하는 볼트 체결 검사 장치.The heat detection unit is configured to include a comparison determination unit for comparing the heat generating area sensed by the camera with a predetermined set value and determines that the bolt is not fully tightened if the heat generating area is more than a predetermined set value. Fastening inspection device. 볼트 체결 부위에 초음파를 발사하는 1단계와; 상기1 단계에서 발사된 초음파에 의하여 상기 볼트 체결 부위에서 발생된 열발생면적을 감지하는 2단계와; 상기2 단계에서 감지된 열발생면적을 소정의 설정치와 비교하여 상기 열발생면적이소정의 설정치 이상인 경우 상기 볼트가 완전히 체결되지 아니한 것으로 판단하는 3단계로 이루어진 것을 특징으로 하는 볼트 체결 검사 동작 방법.Launching ultrasonic waves at the bolt fastening site; Detecting a heat generating area generated at the bolt fastening portion by ultrasonic waves emitted in the first step; And comparing the heat generating area detected in the second step with a predetermined set value and determining that the bolt is not fully tightened when the heat generating area is larger than a predetermined set value.
KR1020010033571A 2001-06-14 2001-06-14 A tighten up bolt checkup device and method for the same KR20020095373A (en)

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KR100471352B1 (en) * 2001-07-10 2005-03-07 기아자동차주식회사 Volt engagement by non-contact vibration measurement
KR101305255B1 (en) * 2011-02-23 2013-09-06 주식회사 엘지화학 Methode and Device for Inspection of Intensity of Ultrasonic Welding
KR20150050034A (en) 2013-10-31 2015-05-08 주식회사다스 Bolt fastening inspection method using position sensor
KR20190067583A (en) 2017-12-07 2019-06-17 주식회사다스 Bolt fastening inspection device
KR102238738B1 (en) 2020-05-18 2021-04-12 (주)성무이엔지 Apparatus for uniting bolt
CN117782868A (en) * 2024-02-28 2024-03-29 西安热工研究院有限公司 Multifunctional bolt detection device and bolt detection method

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US4640131A (en) * 1984-04-16 1987-02-03 Kraftwerk Union Aktiengesellschaft Method and apparatus for the ultrasonic testing of bolts with a wall thickness discontinuity
JPH08240570A (en) * 1995-03-01 1996-09-17 Mitsubishi Heavy Ind Ltd Method for inspecting tightening bolt with hexagon socket
US6236049B1 (en) * 1999-09-16 2001-05-22 Wayne State University Infrared imaging of ultrasonically excited subsurface defects in materials

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US4640131A (en) * 1984-04-16 1987-02-03 Kraftwerk Union Aktiengesellschaft Method and apparatus for the ultrasonic testing of bolts with a wall thickness discontinuity
JPH08240570A (en) * 1995-03-01 1996-09-17 Mitsubishi Heavy Ind Ltd Method for inspecting tightening bolt with hexagon socket
US6236049B1 (en) * 1999-09-16 2001-05-22 Wayne State University Infrared imaging of ultrasonically excited subsurface defects in materials

Cited By (6)

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Publication number Priority date Publication date Assignee Title
KR100471352B1 (en) * 2001-07-10 2005-03-07 기아자동차주식회사 Volt engagement by non-contact vibration measurement
KR101305255B1 (en) * 2011-02-23 2013-09-06 주식회사 엘지화학 Methode and Device for Inspection of Intensity of Ultrasonic Welding
KR20150050034A (en) 2013-10-31 2015-05-08 주식회사다스 Bolt fastening inspection method using position sensor
KR20190067583A (en) 2017-12-07 2019-06-17 주식회사다스 Bolt fastening inspection device
KR102238738B1 (en) 2020-05-18 2021-04-12 (주)성무이엔지 Apparatus for uniting bolt
CN117782868A (en) * 2024-02-28 2024-03-29 西安热工研究院有限公司 Multifunctional bolt detection device and bolt detection method

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