KR20000056288A - Device measuring bolt force of plastic region tightening bolt - Google Patents

Device measuring bolt force of plastic region tightening bolt Download PDF

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Publication number
KR20000056288A
KR20000056288A KR1019990005470A KR19990005470A KR20000056288A KR 20000056288 A KR20000056288 A KR 20000056288A KR 1019990005470 A KR1019990005470 A KR 1019990005470A KR 19990005470 A KR19990005470 A KR 19990005470A KR 20000056288 A KR20000056288 A KR 20000056288A
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KR
South Korea
Prior art keywords
bolt
sensing
sensing part
strain gauges
plastic
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KR1019990005470A
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Korean (ko)
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KR100295844B1 (en
Inventor
장훈
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정몽규
현대자동차 주식회사
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Priority to KR1019990005470A priority Critical patent/KR100295844B1/en
Publication of KR20000056288A publication Critical patent/KR20000056288A/en
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Publication of KR100295844B1 publication Critical patent/KR100295844B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
    • 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
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • 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
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/205—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using distributed sensing elements
    • 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
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

PURPOSE: A rock bolt stress meter of a coupling bolt in a plastic deformation area is provided to sense and measure real rock bolt stress of a bolt by attaching a first sensing part for outputting an elastic deformation signal and a second sensing part for outputting a plastic deformation signal respectively to larger and smaller diameter pats. CONSTITUTION: A rock bolt stressmeter of a coupling bolt in a plastic deformation area includes a first sensing part(1) composed of a circuit having four strain gauges of which two strain gauges in which two rosette strain gauges disposed with two strain gages by 90degree are disposed with a phase difference of 180degree, a second sensing part(3) composed of a same circuit with the first sensing part, and a bolt(5) for attaching the first and second sensing parts to outer surfaces of larger and smaller diameter parts(17,19) and discharging shield lines(23,25) connected to the first and second sensing parts via an inner through hole.

Description

소성역 체결 볼트 축력계{DEVICE MEASURING BOLT FORCE OF PLASTIC REGION TIGHTENING BOLT}DEBICE MEASURING BOLT FORCE OF PLASTIC REGION TIGHTENING BOLT}

본 발명은 소성역 체결 볼트 축력계에 관한 것으로서, 보다 상세하게는 피체결물에 볼트를 체결하면서 볼트의 축력을 연속적으로 감지 및 측정하고, 체결 볼트 내에 체결 특성상 요구되는 소성 변형이 발생되는 지를 판정하는 소성역 체결 볼트 축력계에 관한 것이다.The present invention relates to a plastic station fastening bolt axial force meter, and more particularly, to continuously detect and measure the axial force of a bolt while fastening a bolt to a workpiece, and to determine whether plastic deformation required in the fastening characteristic occurs in the fastening bolt. It relates to a plastic station fastening bolt axial force meter.

최근 엔진의 고성능화 및 소형 경량화 추세에 따라 주요 기능 볼트들은, 설계 자체가 아닌 체결 신뢰성의 결여로 인하여 많은 파손 문제들을 빈번히 일으키고 있다.With the recent trend of high performance and small size of the engine, the major functional bolts are frequently causing many breakage problems due to the lack of fastening reliability, not the design itself.

이러한 기능 볼트는 체결 시, 탄성 변형 및 소성 변형 영역을 가지게 된다. 기존의 탄성 변형 영역에서 체결되는 볼트의 체결 축력은 볼트 생크부에 스트레인 게이지를 부착하여 측정할 수 있다.These functional bolts have elastic deformation and plastic deformation regions when fastened. The fastening axial force of the bolt fastened in the existing elastic deformation region can be measured by attaching a strain gauge to the bolt shank portion.

그러나 이러한 스트레인 게이지는 탄성 변형 영역에서만 비례 특성을 유지하므로 기존의 단순한 스트레인 게이지 회로에 의한 축력계는 볼트 재질의 소성 변형 영역에서에서 볼트의 축력을 측정하지 못하는 단점이 있다.However, since the strain gauge maintains a proportional characteristic only in the elastic deformation region, the conventional axial force meter based on the simple strain gauge circuit cannot measure the axial force of the bolt in the plastic deformation region of the bolt material.

따라서 본 발명은 상기와 같은 한계를 극복하기 위하여 발명된 것으로서, 본 발명의 목적은 소성역 볼트 체결 시, 소성 변형 영역에서도 볼트의 축력을 측정하고, 소성역 체결 특성상 요구되는 볼트 자체의 소성 변형이 발생되었는지를 판정하는 소성역 체결 볼트 축력계를 제공하는 데 있다.Therefore, the present invention has been invented to overcome the above limitations, an object of the present invention is to measure the axial force of the bolt in the plastic deformation region when tightening the plastic station bolt, plastic deformation of the bolt itself required in the plastic station fastening characteristics It is to provide a plastic station fastening bolt axial force meter to determine whether or not it has occurred.

도 1은 본 발명에 따른 소성역 체결 볼트 축력계의 사시도이다.1 is a perspective view of a plastic station fastening bolt axial system according to the present invention.

도 2는 본 발명에 따른 소성역 체결 볼트 축력계의 일부 회로도이다.2 is a partial circuit diagram of a plastic station fastening bolt accelerometer according to the present invention.

도 3은 도 1의 부분 단면도이다.3 is a partial cross-sectional view of FIG. 1.

도 4는 본 발명에 따른 소성역 체결 볼트 축력계의 축력과 변형률 관계를 도시한 그래프이다.4 is a graph showing the relationship between the axial force and the strain of the plastic station fastening bolt accelerometer according to the present invention.

〈도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

1,3:제1,2감지부 5:볼트, 11,13:제1,2로제트형 스트레인 게이지, 15:신호 조절 증폭기, 17,19:대, 소 직경부, 21:관통구, 23,25:쉴드 선1,3: 1st, 2nd detection part 5: Bolt, 11, 13: 1st, 2nd rose type strain gauge, 15: signal control amplifier, 17, 19: large, small diameter part, 21: through-hole, 23, 25: Shield line

이를 실현하기 위한 본 발명에 따른 소성역 체결 볼트 축력계는,Plastic zone fastening bolt axial force meter according to the present invention for realizing this,

90°로제트형(rosette) 스트레인 게이지 2개를 180°위상 차이로 배치한, 4개의 스트레인 게이지로 회로를 구성한 제1감지부,A first sensing unit consisting of four strain gauges with two 90 ° rosette strain gauges arranged at 180 ° phase difference,

이 제1감지부와 같은 회로를 별도로 구성한 제2감지부,A second sensing unit separately configured with the same circuit as the first sensing unit,

상기 제1,2감지부를 대 직경부와 소 직경부의 외면에 각각 부착하고 이에 연결되는 쉴드 선을 내측 관통구로 인출하는 볼트를 포함하여 이루어짐을 특징으로 한다.And a bolt for attaching the first and second sensing parts to outer surfaces of the large diameter portion and the small diameter portion, respectively, and drawing the shield wire connected thereto to the inner through hole.

이하 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 보다 상세히 설명한다.BEST MODE Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 소성역 체결 볼트 축력계의 사시도로서, 이는 제1,2감지부(1,3)와 볼트(5)를 포함하여 구성된다.1 is a perspective view of a plastic station fastening bolt accelerometer according to the present invention, which comprises first and second sensing parts 1 and 3 and a bolt 5.

제1감지부(1)는 도 2에 도시된 바와 같이, 2개의 스트레인 게이지(7,9)를 90°로 배치하여 형성된 제1로제트형 스트레인 게이지(11)와, 이와 같은 배치를 가지는 제2로제트형 스트레인 게이지(13)를 180°위상 차이로 배치한 회로로 구성되어 있다. 또 제1,2로제트형 스트레인 게이지(13)는 신호 조절 증폭기(15)에 연결되는 4개의 스트레인 게이지로 형성되어 있다.As shown in FIG. 2, the first sensing unit 1 includes a first rosette type strain gauge 11 formed by arranging two strain gauges 7 and 9 at 90 °, and a second having such an arrangement. It consists of the circuit which arrange | positioned rosette type strain gauge 13 by 180 degree phase difference. The first and second rosette strain gages 13 are formed of four strain gages connected to the signal conditioning amplifier 15.

제2감지부(3)는 제1감지부(1)와 같은 회로로 구성되어 있으므로 도면 및 그 상세한 설명을 생략한다.Since the second sensing unit 3 is composed of the same circuit as the first sensing unit 1, the drawings and detailed description thereof will be omitted.

그리고 볼트(5)는 도 3에 도시된 바와 같이, 대 직경부(17), 소 직경부(19), 그리고 관통구(21)를 구비하고 있다. 대 직경부(17)의 외면에는 제1감지부(1)가 부착되고, 소 직경부(19)의 외면에서 제2감지부(3)가 부착되어 있다. 그리고 대, 소 직경부(17,19)에 부착된 제1,2로제트형 스트레인 게이지(1,3)는 관통구(21)로 인출되는 쉴드 선(23,25)에 의하여 신호 조절 증폭기(15)에 각각 연결되어 있다.And the bolt 5 is provided with the large diameter part 17, the small diameter part 19, and the through hole 21, as shown in FIG. The first sensing portion 1 is attached to the outer surface of the large diameter portion 17, and the second sensing portion 3 is attached to the outer surface of the small diameter portion 19. The first and second rosette strain gauges 1 and 3 attached to the large and small diameter portions 17 and 19 are connected to the signal conditioning amplifiers 15 by the shield wires 23 and 25 which are led to the through holes 21. Are each connected to).

상술한 바와 같이 구성된 소성역 체결 볼트 축력계의 작용은 다음과 같다.The action of the plastic zone fastening bolt axial system configured as described above is as follows.

소성역 체결 볼트 축력계의 볼트(3)를 피 체결물에 장착한 후, 토오크 랜치로 회전시키면, 소 직경부(19)에 부착된 제2감지부(3)는 볼트(5) 자체의 소성 변형이 발생되는지의 여부를 확인시키는 신호를 발생시켜 쉴드 선(25)을 통하여 신호 조절 증폭기(15)에 인가시킨다. 이 소 직경부(19)의 신호는 도 4에 도시된 바와 같이, 일정 구간에서 비례하는 축력 및 변형률 관계로 나타난다.When the bolt 3 of the plastic zone tightening bolt shaft system is mounted on the fastened object and then rotated by a torque wrench, the second sensing part 3 attached to the small diameter part 19 causes the bolt 5 itself to be fired. A signal confirming whether or not deformation is generated is generated and applied to the signal conditioning amplifier 15 through the shield wire 25. As shown in FIG. 4, the signal of the small diameter portion 19 is represented by a axial force and a strain relationship that are proportional in a predetermined section.

특히, 대 직경부(17)에 부착된 제1감지부(1)는, 소 직경부(19)에서 소성 변형이 발생되어도 탄성적 특성을 지니므로 탄성 변형의 신호를 발생시켜 쉴드 선(23)을 통하여 신호 조절 증폭기(15)에 인가시킨다. 이 대 직경부(17)의 신호도 도 4에 도시된 바와 같이, 일정 구간에서 비례하는 축력 및 변형률 관계로 나타난다.In particular, the first sensing unit 1 attached to the large diameter portion 17 has elastic properties even when plastic deformation occurs in the small diameter portion 19, so that it generates a signal of elastic deformation to shield the wire 23. It is applied to the signal conditioning amplifier 15 through. As shown in FIG. 4, the signal of the large diameter portion 17 is also represented by the relation between the axial force and the strain in a predetermined section.

따라서 이 축력계는 제1,2감지부(1,3)의 신호에 의한 축력 및 변형률의 비례 관계로 실제 볼트(5)에 작용되는 체결 축력을 감지 및 측정한다.Therefore, the accelerometer detects and measures the clamping force applied to the actual bolt 5 in a proportional relationship between the axial force and the strain caused by the signals of the first and second sensing parts 1 and 3.

상술한 바와 같이 본 발명에 따른 소성역 체결 볼트 축력계는 제1,2감지부를 볼트의 대 직경부와 소 직경부에 각각 부착하여 구성되므로 볼트 체결 시, 제2감지부는 소성 변형 신호를 보내고 이때에도 제1감지부는 탄성 변형 신호를 보내므로 볼트의 실제 체결 축력을 감지 및 측정할 수 있다. 또한 본 발명은 실제 볼트 체결시 체결 특성에 중요한 나사부 및 볼트 머리 밑면을 전혀 손상시키지 않으므로 볼트내에 기능상 요구되는 목표 축력을 정확히 달성하는 토오크법이나 각도변의 정확한 체결 사항 결정을 가능하게 한다.As described above, the plastic zone tightening bolt accelerometer according to the present invention is configured by attaching the first and second sensing parts to the large diameter part and the small diameter part of the bolt, respectively. In addition, since the first detection unit sends an elastic deformation signal, the actual fastening axial force of the bolt can be detected and measured. In addition, since the present invention does not damage the screw portion and the bottom of the bolt head which is important for the fastening characteristics at the time of the actual bolt fastening, it is possible to determine the exact tightening matter of the torque method or the angle side to accurately achieve the target axial force required in the bolt.

Claims (1)

90°로제트형 스트레인 게이지 2개를 180°위상 차이로 배치한, 4개의 스트레인 게이지로 회로를 구성한 제1감지부,A first sensing unit consisting of four strain gauges arranged with two 90 ° rosette strain gauges with a 180 ° phase difference, 상기 제1감지부와 같은 회로를 구성한 제2감지부,A second sensing unit constituting the same circuit as the first sensing unit, 상기 제1,2감지부를 대 직경부와 소 직경부의 외면에 각각 부착하고, 제1,2감지부에 연결된 쉴드 선을 내측 관통구로 배출하는 볼트를 포함하는 소성역 체결 볼트 축력계.And a bolt for attaching the first and second sensing portions to outer surfaces of the large diameter portion and the small diameter portion, respectively, and for discharging the shield wire connected to the first and second sensing portions to the inner through hole.
KR1019990005470A 1999-02-19 1999-02-19 Device measuring bolt force of plastic region tightening bolt KR100295844B1 (en)

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KR1019990005470A KR100295844B1 (en) 1999-02-19 1999-02-19 Device measuring bolt force of plastic region tightening bolt

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KR100295844B1 KR100295844B1 (en) 2001-07-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100569106B1 (en) * 2004-07-06 2006-04-07 현대자동차주식회사 Apparatus for checking deformation for plastic bolt
CN109595240A (en) * 2019-01-15 2019-04-09 法智达(北京)科技有限公司 A kind of intelligence anchor bolt
KR20230061010A (en) 2021-10-28 2023-05-08 미래이엔씨 주식회사 Finished Rock-Bolt tensometer performance verification device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100569106B1 (en) * 2004-07-06 2006-04-07 현대자동차주식회사 Apparatus for checking deformation for plastic bolt
CN109595240A (en) * 2019-01-15 2019-04-09 法智达(北京)科技有限公司 A kind of intelligence anchor bolt
KR20230061010A (en) 2021-10-28 2023-05-08 미래이엔씨 주식회사 Finished Rock-Bolt tensometer performance verification device

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