CN103419165B - A kind of high accuracy torque spanner and verification, installation and detection method - Google Patents

A kind of high accuracy torque spanner and verification, installation and detection method Download PDF

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Publication number
CN103419165B
CN103419165B CN201310317706.6A CN201310317706A CN103419165B CN 103419165 B CN103419165 B CN 103419165B CN 201310317706 A CN201310317706 A CN 201310317706A CN 103419165 B CN103419165 B CN 103419165B
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CN
China
Prior art keywords
spanner
connecting plate
torque
elastomer
high accuracy
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CN201310317706.6A
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CN103419165A (en
Inventor
孟峰
张智敏
张跃
蔡常青
张伟
王肖磊
张殿龙
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National Institute of Metrology
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National Institute of Metrology
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Publication of CN103419165A publication Critical patent/CN103419165A/en
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Abstract

The invention discloses a kind of high accuracy torque spanner and verification, installation and detection method, including sensing element, the arm of force and display unit, described sensing element is connected with the described arm of force, and described display unit is connected with described sensing element by holding wire, completes display output;Described sensing element includes stressed plate, elastomer, one group of connecting plate, side's tenon and one group of foil gauge;Described one group of connecting plate includes front connecting plate and rear connecting plate;Described stressed plate and elastomer are fixedly installed between described front connecting plate and rear connecting plate, form a fixed body;Described side's tenon is arranged on the lower surface of described sensing element;Foil gauge described in one group is arranged on sensing element;The opposite side of the fixing connecting plate in the rear in described arm of force one end, applies active force;Described display unit electrically connects with described one group of foil gauge.The measurement torque value of the present invention is not affected by forced position, provides science to calibrate means reliably for detecting device for determining torque of spanner assay calibration.

Description

A kind of high accuracy torque spanner and verification, installation and detection method
Technical field
The present invention relates to a kind of high precision high accuracy torque spanner and using method thereof, can be used for bolt tighten, Bolt tightens detection, torsion-testing and detecting device for determining torque of spanner testing calibration.
Background technology
Torque spanner, also known as torque wrench, a kind of is mainly used in the instrument that bolt is tightened, named in GB Torque wrench, named torque spanner in vertification regulation series, the instrument that torque spanner is examined and determine Do detecting device for determining torque of spanner, present specification is continued to use customary nomenclature in code, it may be assumed that torque spanner and torsion Square spanner calibrating instrument.Both at home and abroad bolt tightening torque is increasingly paid attention at present, high-precision torque spanner Application demand more and more urgent, external manufacturer production high accuracy torque spanner can reach 1%, uses as standard Torque spanner reached 0.1% precision especially.Domestic torque spanner is difficult to reach 1% precision, and is changing Force application location time error is very big, and when i.e. changing stress point position, numerical value will have large change.Can only be at spanner Exert a force at the groove of labelling guarantee 1% precision, will be unable to reach 1% precision as somewhat adjusted position.
Additionally, up-to-date revision and will promulgate execution country detecting device for determining torque of spanner vertification regulation, it is desirable to standard The accuracy class of torque spanner reaches 0.3% and 0.1% two-stage, and when changing forced position and examining and determine still Can reach above-mentioned two-stage accuracy class, and the most domestic standard torque spanner being also not reaching to this regulatory requirements.
Summary of the invention
The present invention utilizes strain measurement technique, designs in conjunction with force structure, and a kind of high accuracy of independent development is turned round Square spanner, is characterized in scientific and reasonable for structure, accuracy class is high, can reach 0.1% precision, compares prior art 1% precision realized improves an order of magnitude, and the error of indication is the most excellent with repeatability under different force application locations In 0.1%.The torque spanner range ability of present invention series can be from 0.1Nm-5000Nm, it is possible to meet The new national detecting device for determining torque of spanner vertification regulation revised and execution will be promulgated.Additionally, the moment of torsion of the present invention Spanner is portable and smart, be easy to carry, can be widely used for all kinds of bolt tightening control and assembly quality of bolt detection, Use as standard device and can be also used for the detection of torque spanner assay device.
A kind of high accuracy torque spanner, including sensing element, the arm of force and display unit, described sensing element Being connected with the described arm of force, described display unit is connected with described sensing element by holding wire, completes display Output;
Described sensing element includes stressed plate 4,7, one group of connecting plate of elastomer, side's tenon 5 and one group of foil gauge 6;
Described one group of connecting plate includes front connecting plate 3 and rear connecting plate 8;Described stressed plate 4 and elastomer 7 are solid Surely it is arranged between described front connecting plate 3 and rear connecting plate 8, forms a fixed body;Described side's tenon 5 sets Put on the lower surface of described sensing element;Described output side tenon 5 is positioned at the bottom surface of described stressed plate 4;Institute State foil gauge 6 to be positioned on two sidewalls of described elastomer 7.The bottom of described stressed plate 4 arranges square opening, Described side's tenon 5 embeds in this square opening by Magnet, the axis centre line of described square opening and described side's tenon 5 Axis centre line overlap.
Described rear connecting plate 8 is connected with the arm of force;Screwed hole can be left on rear connecting plate 8 to pass through with the arm of force Bolt connects, it is also possible to processes other suitable modes on rear connecting plate 8 and makes 8 to be attached with the arm of force.
Described in one group, foil gauge 6 is arranged on sensing element;Described in one group, foil gauge 6 is arranged on described elasticity On the surface, two side of body 7, and upper and lower two panels foil gauge 6 is fixed in every side, and four foil gauges of both sides are respectively For ε 1, ε 2, ε 3, ε 4;
Described four foil gauges form full electric bridge, and the fixed position of described foil gauge 6 makes each foil gauge 6 along perpendicular Straight direction centrage with side tenon 5 the parallel and each centrage of axis centre line to described front connecting plate 3 Apart from equal.
The opposite side of the fixing connecting plate 8 in the rear in described arm of force one end, applies active force;Described display part Part electrically connects with described one group of foil gauge 6.The torque value that display is applied on bolt, foil gauge composition is complete It is connected with outside display instrument by adaptor after bridge.
In concrete scheme, described elastomer 7 is fixed on the top of described stressed plate 4;
Between described stressed plate 4 and elastomer 7 and described front connecting plate 3 and rear connecting plate 8 be integral type structure or Person is connected by connection member;Described connection member includes that is fixed a bolt;For by described stressed plate 4, Elastomer 7 is fixed in the middle of described front connecting plate 3 and rear connecting plate 8;Stressed plate 4 simply one end is fixed, Do not contact with elastomer, moment of torsion is transmitted on elastomer 7 by connecting plate 3.
In being embodied as, described connection member is that bolt the 2, the 3rd installation installed by the first installation bolt 1, second Bolt 9;Described first installs bolt 1 is connected fixing with described elastomer 7 for described front connecting plate 3;Described Second installs bolt 2 is connected fixing with described stressed plate 4 for described front connecting plate 3;Described 3rd installs spiral shell Bolt 9 is connected fixing with described elastomer 7 for described rear connecting plate 8.
Can include following several situation:
Described front connecting plate 3 is integral type structure with described elastomer 7, and described front connecting plate 3 is subject to described Connect by the second installation bolt 2 is fixing between power plate 4, described rear connecting plate 8 and described elastomer 7 it Between connect by the 3rd installation bolt 9 is fixing;
Or, described front connecting plate 3 be integral type structure with described stressed plate 4, described front connecting plate 3 and Connect by the first installation bolt 1 is fixing between described elastomer 7, described rear connecting plate 8 and described elasticity Connect by the 3rd installation bolt 9 is fixing between body 7;
Or, described elastomer 7 and described rear connecting plate 8 be integral type structure, described front connecting plate 3 and Connect by the first installation bolt 1 is fixing between described elastomer 7, described front connecting plate 3 and described stress Connect by the second installation bolt 2 is fixing between plate 4;
Or, described elastomer 7 and described rear connecting plate 8 be integral type structure, described front connecting plate 3 and Described stressed plate 4 is integral type structure, by the second peace between described front connecting plate 3 and described stressed plate 4 Dress bolt 2 is fixing to be connected.
By described front connecting plate 3 and described stressed plate 4 and/or described elastomer 7 and/or described elastomer 7 When forming integral structure with described rear connecting plate 8, so that high manufacturing accuracy can be realized for most preferably mode.
If not being integral structure between described front connecting plate 3 and described stressed plate 4 or elastomer 7, institute Stating between elastomer 7 and described rear connecting plate 8 is not integral structure, is all connected by connection member:
Described elastomer cross section is circle or rectangle etc..
Can be all circle or rectangle etc. before and after patch foil gauge position.Without specific function, during different cross section design according to The strain calculation algorithm produced during force equation its same moment of torsion different is different.
The size adjustable of the Length x Width of described elastomer 7, when Length x Width changes corresponding area of section with Change, for change high accuracy torque spanner range ability.
Including
Described sensing element also includes that shell 10, described jacket apply at described front connecting plate 3, rear connecting plate 8 Outside with elastomer 7.
Second inventive point of the present invention is to utilize high accuracy torque spanner to carry out detecting device for determining torque of spanner verification Method
Described detecting device for determining torque of spanner method of calibration is by described high accuracy torque spanner and detecting device for determining torque of spanner Connect, for the detecting device for determining torque of spanner described in assay calibration;
The square tenon 5 of described torque spanner is connected with the test side of described detecting device for determining torque of spanner;Unlatching moment of torsion is pulled Sub-calibrating instrument, operation detecting device for determining torque of spanner is worked as retroaction shelves arm mechanism on detecting device for determining torque of spanner and is touched height After the precision torque wrench arm of force, just place a torque on spanner, and then compare both data, moment of torsion is pulled The measured value of sub-calibrating instrument verifies.
The present invention is in applying described torque spanner, and the 3rd inventive point of the present invention is torque spanner is carried out bolt Installation method: bolt is revolved according to required precision by the square tenon 5 of described torque spanner by fixing sleeve Fasten connection.Stop after arriving moment of torsion to be installed.
It addition, torque spanner of the present invention for install bolt in addition to can installing, be more important that bolt is installed Mass measuring method, according to setting and working condition requirement, by the square tenon 5 of described torque spanner by fixing sleeve The torque value installing bolt is detected.
The spanner of the present invention can be according to different ranges, and the arm of force of design different length, such as torque arm length can With from 200mm~1500mm, spanner total quality is from 1kg~10kg.
The high accuracy torque spanner of the present invention, has accuracy class high: relative error of indicating value and repeatability are the most excellent In 0.1%.It is crucial that tenon center, the side of being all the time moment of torsion that spanner is measured when changing point of application position Value, is different from other Digital-display torque spanners and will bring the defect of bigger measurement error when changing forced position. The high accuracy torque spanner range ability width of the present invention: can be from 0.1Nm-5000Nm.It is dexterous light, it is easy to Carry.
Additionally, the size changing the spanner elastomer of the present invention just can change spanner range ability, this structure Can be implemented in 0.1Nm-5000Nm, in the range of preferably 1Nm~2000Nm, reach 0.1% precision, measure Uncertainty 0.1%(k=2), when changing stress point position, the error of indication and uncertainty are superior to 0.1% (k=2), therefore can be as the standard torque spanner of detecting device for determining torque of spanner assay calibration.
Sum it up, the present invention is one has high-precision torque spanner, meet the measurement of new standard-required Torque value is not affected by forced position, provides science to calibrate hands reliably for detecting device for determining torque of spanner assay calibration Section.Operating mode detection can also be tightened for bolt and scientific and effective high accuracy torque spanner is provided, and, this Bright high accuracy torque spanner is practical and convenient, twists for testing calibration detecting device for determining torque of spanner of going out, all kinds of bolt Tight torsion-testing provides convenient and practical standard.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high accuracy torque spanner of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the structural representation of the sensing element of present invention high accuracy torque spanner.Fig. 4 is bowing of Fig. 3 View.
Description of reference numerals:
A-sensing element, the b-arm of force, 1-first install bolt, 2-second installs connecting plate, 4-before bolt, 3- After stressed plate, 5-output side tenon, 6-foil gauge, 7-elastomer, 8-, connecting plate, 9-the 3rd install bolt, 10- Shell.
Detailed description of the invention
Below in conjunction with embodiment, further illustrate the present invention.
Embodiment 1
High accuracy torque spanner as shown in figs. 34, it include sensing element, the arm of force and display instrument, Described sensing element is connected with the described arm of force, and described display instrument is by holding wire with described sensing element even Connect, it is characterised in that:
Described sensing element includes front connecting plate 3 and rear connecting plate 8, stressed plate 4, elastomer 7 side's tenon 5 And foil gauge 6;
Described stressed plate 4 and described elastomer 7 are at the homonymy of described front connecting plate 3, described elastomer 7 Being positioned at the top of described stressed plate 4, in described elastomer 7 and the horizontal direction of described stressed plate 4, each is put down Face is parallel to each other;Described rear connecting plate 8 is positioned at the opposite side of described elastomer 7;
Described front connecting plate 3 and described stressed plate 4 and/or described elastomer 7 and/or described elastomer 7 and institute State and for integral type structure or connected by connection member between rear connecting plate 8;
Described rear connecting plate 8 is connected with the arm of force;Screwed hole can be left on rear connecting plate 8 to pass through with the arm of force Bolt connects, it is also possible to processes other suitable modes on rear connecting plate 8 and makes 8 to be attached with the arm of force.
Described output side tenon 5 is positioned at the bottom of described stressed plate 4, and described foil gauge 6 is positioned at described elastomer 7 Two sidewalls.
Described front connecting plate 3 is subject to described for integral type structure or described front connecting plate 3 with described elastomer 7 Power plate 4 is integral type structure and/or described elastomer 7 is integral type structure with described rear connecting plate 8.Described The bottom of stressed plate 4 arranges square opening, and described output side tenon 5 embeds in this square opening by Magnet, described The centrage of square opening overlaps with the centrage of described output side tenon 5.
Two panels foil gauge 6 is pasted in every side of two sidewalls of elastomer 7, and both sides paste four foil gauges 6 altogether, Being respectively ε 1, ε 2, ε 3, ε 4, four foil gauge composition full-bridges, the paste position of described foil gauge 6 to be protected Demonstrate,prove each foil gauge 6 to arrive along vertical direction centrage with the centerline parallel of output side's tenon 5 and each centrage The distance of described front connecting plate 3 is equal.
Described connection member is that bolt the 2, the 3rd installation bolt 9 installed by the first installation bolt 1, second;
Described first installs bolt 1 is connected fixing with described elastomer 7 for described front connecting plate 3;
Described second installs bolt 2 is connected fixing with described stressed plate 4 for described front connecting plate 3;
Described 3rd installs bolt 9 is connected fixing with described elastomer 7 for described rear connecting plate 8.
Described front connecting plate 3 is installed bolt 1 by two first and is secured in the both sides of elastomer 7 one end;
Described front connecting plate 3 is installed bolt 2 by two second and is secured in the both sides of stressed plate 4 one end;
It is solid with it in the both sides of elastomer 7 other end that described rear connecting plate 8 installs bolt 9 by two the 3rd Fixed.
Described sensing element also includes shell 10, and it is the structure being made up of end face and two sides, said two Screwed hole is left to be connected with front connecting plate 3 and rear connecting plate 8 or to be connected with elastomer 7 respectively on side.
Described elastomer 7 posts the part of foil gauge 6, and its cross section is rectangle or circle etc..Without specific work With, the strain calculation algorithm produced during its same moment of torsion different according to force equation during different cross section design is different.
The spanner of the present invention can be according to different ranges, the arm of force of design different length, such as can be from 200mm~1500mm, spanner total quality is from 1kg~10kg.
The work process of the present invention is:
First: when detecting device for determining torque of spanner being carried out calibration detection as standard torque spanner, by this high accuracy Torque spanner is arranged on detecting device for determining torque of spanner as common wrench, according to detecting device for determining torque of spanner calibrating rule Journey Plays torque spanner checking method is examined and determine.
Second: when carrying out bolt installation as high accuracy torque spanner or bolt installation quality is detected, This spanner can be attached with installing bolt by sleeve, bolt be screwed, when reaching target torque Stop during value.
Technique scheme is one embodiment of the present invention, for those skilled in the art, On the basis of the invention discloses application process and principle, it is easy to make various types of improvement or deformation, Being not limited solely to the method described by the above-mentioned detailed description of the invention of the present invention, the most previously described mode is simply Preferably, and not restrictive meaning.

Claims (9)

1. a high accuracy torque spanner, it is characterised in that: include sensing element, the arm of force and display unit, institute Stating sensing element to be connected with the described arm of force, described display unit is connected with described sensing element by holding wire, Complete display output;
Described sensing element includes stressed plate (4), elastomer (7), one group of connecting plate, side's tenon (5) and Group foil gauge (6);
Described one group of connecting plate includes front connecting plate (3) and rear connecting plate (8);Described stressed plate (4) and Elastomer (7) is fixedly installed between described front connecting plate (3) and rear connecting plate (8), forms one admittedly Determine body;Described side's tenon (5) is arranged on the lower surface of described sensing element;Foil gauge (6) described in one group It is arranged on sensing element;
The opposite side of the fixing connecting plate (8) in the rear in described arm of force one end, applies active force;Described display Parts are connected by joint and signal transmssion line with described one group of foil gauge (6);
Described elastomer (7) is fixed on the top of described stressed plate (4);
Stressed plate (4) is that one end is fixed, and does not contacts with elastomer, by moment of torsion by front connecting plate (3) It is transmitted on elastomer (7);And
Described in one group, foil gauge (6) is arranged on the surface, two side of described elastomer (7), and every side Fixing upper and lower two panels foil gauge (6), four foil gauges of both sides are respectively ε 1, ε 2, ε 3, ε 4;
Described four foil gauges form full electric bridge, and the fixed position of described foil gauge (6) makes each foil gauge (6) Connect before described along vertical direction centrage with the parallel and each centrage of axis centre line of side's tenon (5) The distance of plate (3) is equal.
A kind of high accuracy torque spanner the most according to claim 1, it is characterised in that:
Described stressed plate (4) and elastomer (7) and described front connecting plate (3) and rear connecting plate (8) it Between for integral type structure or connected by connection member;
Described side's tenon (5) is positioned at the bottom surface of described stressed plate (4);Described foil gauge (6) is positioned at described bullet On two sidewalls of gonosome (7).
A kind of high accuracy torque spanner the most according to claim 1 and 2, it is characterised in that:
The bottom of described stressed plate (4) arranges square opening, and it is square that described side's tenon (5) embeds this by Magnet In hole, the axis centre line of described square opening overlaps with the axis centre line of described side's tenon (5).
A kind of high accuracy torque spanner the most according to claim 2, it is characterised in that:
The cross section of described elastomer (7) is circular or rectangle.
5. a kind of high accuracy torque spanner according to claim 1, described in any one in 2,4, it is characterised in that:
The length of described elastomer (7), width dimensions is adjustable, for changing the range model of high accuracy torque spanner Enclose.
A kind of high accuracy torque spanner the most according to claim 2, it is characterised in that:
Described connection member includes that is fixed a bolt;For by described stressed plate (4), elastomer (7) is solid It is scheduled in the middle of described front connecting plate (3) and rear connecting plate (8);
Described sensing element also includes shell (10), described jacket apply described front connecting plate (3), after connect Fishplate bar (8) is with elastomer (7) outward.
7. one kind utilizes the high accuracy torque spanner as described in any one in claim 1-6 to carry out torque spanner Calibrating instrument method of calibration, it is characterised in that:
Described detecting device for determining torque of spanner method of calibration is by described high accuracy torque spanner and detecting device for determining torque of spanner Connect, for the detecting device for determining torque of spanner described in assay calibration;
The square tenon (5) of described torque spanner is connected with the test side of described detecting device for determining torque of spanner;Open and turn round Square spanner calibrating instrument, operation detecting device for determining torque of spanner is when retroaction shelves arm mechanism contact on detecting device for determining torque of spanner After the high accuracy torque spanner arm of force, just place a torque on spanner, and then compare both data, to torsion The measured value of square spanner calibrating instrument verifies.
8. one kind utilizes the high accuracy torque spanner as described in any one in claim 1-6 to carry out bolt installation Method, it is characterised in that:
Carry out screwing admittedly according to required precision by bolt by fixing sleeve by the square tenon (5) of described torque spanner Fixed connection, stops after arriving moment of torsion to be installed.
9. one kind utilizes the high accuracy torque spanner as described in any one in claim 1-6 to carry out high accuracy spiral shell Bolt installation quality measuring method, it is characterised in that:
According to setting and working condition requirement, by the square tenon (5) of described torque spanner by fixing sleeve to installing spiral shell The torque value of bolt detects.
CN201310317706.6A 2013-07-26 2013-07-26 A kind of high accuracy torque spanner and verification, installation and detection method Expired - Fee Related CN103419165B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107764469B (en) * 2017-10-16 2023-11-14 河南鑫亮建设工程有限公司 Torque spanner calibrating device and bolt simulator thereof
CN107677415B (en) * 2017-10-16 2023-05-19 河南省计量科学研究院 Torque wrench calibrating device
CN113681497B (en) * 2021-08-23 2022-10-04 苏州金锐启智能装备科技有限公司 Method for automatically searching force application line of digital display torque wrench

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558601A (en) * 1984-01-06 1985-12-17 J. S. Technology, Inc. Digital indicating torque wrench
CN2833545Y (en) * 2005-10-27 2006-11-01 扬动股份有限公司 Torsional moment constant spanner calibrator
CN102145480A (en) * 2011-02-18 2011-08-10 浙江亿洋工具制造有限公司 Torque wrench structure
CN202540196U (en) * 2012-04-06 2012-11-21 中国航天空气动力技术研究院 Direct measurement type digital display torque spanner
CN203396526U (en) * 2013-07-26 2014-01-15 中国计量科学研究院 High-precision torque wrench

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558601A (en) * 1984-01-06 1985-12-17 J. S. Technology, Inc. Digital indicating torque wrench
CN2833545Y (en) * 2005-10-27 2006-11-01 扬动股份有限公司 Torsional moment constant spanner calibrator
CN102145480A (en) * 2011-02-18 2011-08-10 浙江亿洋工具制造有限公司 Torque wrench structure
CN202540196U (en) * 2012-04-06 2012-11-21 中国航天空气动力技术研究院 Direct measurement type digital display torque spanner
CN203396526U (en) * 2013-07-26 2014-01-15 中国计量科学研究院 High-precision torque wrench

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