CN105784249B - A kind of measuring device and measuring method that helicitic texture torsion is established unprincipled connection - Google Patents
A kind of measuring device and measuring method that helicitic texture torsion is established unprincipled connection Download PDFInfo
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- CN105784249B CN105784249B CN201610183179.8A CN201610183179A CN105784249B CN 105784249 B CN105784249 B CN 105784249B CN 201610183179 A CN201610183179 A CN 201610183179A CN 105784249 B CN105784249 B CN 105784249B
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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
- G01L5/246—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 using acoustic waves
Abstract
The present invention provides a kind of helicitic texture and turns round the measuring device and measuring method established unprincipled connection, to solve the problems, such as that the torsion of the bolt for being only capable of measuring larger size is drawn in traditional torsion, bolt that can not be shorter to length and structure are more compact helicitic texture establishes unprincipled connection to measure.Wherein helicitic texture turns round the measuring device established unprincipled connection, and is applied to screw thread, the measuring device includes: fixed bracket, is set in fixed bracket with the internal screw thread test specimen that bolt is coupled；Fixing piece is set in fixed bracket, wherein after bolt plugs fixing piece, is connect with internal screw thread test specimen；Torque applies structure, applies structure for torque and applies torque on bolt, tightens bolt relative to internal screw thread test specimen and fixing piece；Torque measurement structure applies structure with torque and connect, for detecting torque；Sound wave axle power measuring instrument, is fixed on the end face of the screw rod of bolt, and sound wave axle power measuring instrument is used to detect the pretightning force when bolt is tightened relative to internal screw thread test specimen and fixing piece, on bolt.
Description
Technical field
The present invention relates to mechanical engineering technical field, especially a kind of helicitic texture turns round the measuring device and measurement established unprincipled connection
Method.
Background technique
Threaded connection is one of most widely used assembly connection mode in electronic product.According to statistics, on each automobile
It threaded fastener up to 4000 to 7000, is threadedly coupled assembling work amount and also accounts for the 70% of entire assembly operation of motor amount.
Threaded fastener has the power of fastening effect (power is referred to as pre- since material is stretched in rundown process in internal generate
Clamp force), and it is self-locking by frictional force realization, to achieve the purpose that keep pretightning force.Suitable pretightning force can not only mention
Rise the anti-loosening property being threadedly coupled, it is ensured that the reliability of Automatic manual transmission, and can control erection stress size, guarantee assembly essence
Degree.
But since pretightning force is not easy directly to measure and control, other methods are generallyd use in Practical Project and indirectly control preload
Power.Common method includes: calibrated wrench method, angle method, elongation method and surrender method.Calibrated wrench method is controlled indirectly by control screw-down torque
Pretightning force processed.This method has the characteristics that tool simple, flexible operation, at low cost, is therefore widely used in engineering practice；
But due to the unstability of the factors such as coefficient of friction, so that pretightning force dispersion is usually larger.Therefore, calibrated wrench method measures pretightning force
It is not high to control precision.
Currently in order to pretightning force when improving calibrated wrench method assembly controls precision, measured using relatively conventional sampling experiment every
The torsion of the helicitic texture of batch is established unprincipled connection, and the pretightning force of helicitic texture is then accurately controlled using the calibrated wrench method.As shown in Figure 1
Tradition, which is turned round, draws experiment, is turned round between the bolt 103 and internal screw thread test specimen 101 (nut etc.) that draw testing machine by traditional bolt axial force
The pretightning force of axial force sensor 104 and test specimen cushion block 102 the measurement bolt of sandwiched, general axial force sensor 104 has certain
Thickness, while test specimen cushion block 102 is also required to certain thickness, drives tightening piece 105 to tighten bolt 103 by motor 107, benefit
Screw-down torque is measured with torque sensor 106,103 length of bolt which draws experimental machine that can measure must be longer, therefore should
Bolt, which is turned round, draws bolt 103 that experimental machine can not be shorter to length and the more compact helicitic texture of structure to measure.
In conclusion tradition turn round draw experiment measurement the problem is that: the bolt for being merely able to measurement larger size is (especially long
Spend longer bolt arrangement) torsion establish unprincipled connection, the more compact helicitic texture of bolt and structure that can not be shorter to length
Torsion establish unprincipled connection to measure.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of measuring device and measuring method that helicitic texture torsion is established unprincipled connection, with
Solve traditional torsion draw only be capable of measuring larger size bolt, can not be shorter to length bolt and structure it is more compact
The problem of torsion of helicitic texture establishes unprincipled connection to measure.
To achieve the goals above, a kind of helicitic texture provided in an embodiment of the present invention turns round the measuring device established unprincipled connection, and answers
For bolt, the helicitic texture turns round the measuring device established unprincipled connection and includes:
Fixed bracket, is set in the fixed bracket with the internal screw thread test specimen that the bolt is coupled；
Fixing piece is set in the fixed bracket, wherein after the bolt plugs the fixing piece, with the interior spiral shell
The connection of line test specimen；
Torque applies structure, applies structure for the torque and applies torque on the bolt, keeps the bolt opposite
It is tightened in the internal screw thread test specimen and the fixing piece；
Torque measurement structure applies structure with the torque and connect, for detecting the torque；
Sound wave axle power measuring instrument, is fixed on the end face of the screw rod of the bolt, and the sound wave axle power measuring instrument is for examining
Survey the pretightning force when the bolt is tightened relative to the internal screw thread test specimen and the fixing piece, on the bolt.
Further, the sound wave axle power measuring instrument is ultrasonic wave axle power measuring instrument.
Further, the ultrasonic wave axle power measuring instrument includes: the piezoelectricity being arranged on the end face of the screw rod of the bolt
Potsherd；
Sound wave generation/receiver being connect with the piezoelectric ceramic piece, applying voltage signal for the piezoelectric ceramic piece；
And
Be arranged on the end face of the screw rod of the bolt, the detection bolt extruder temperature temperature sensor and with
The temperature detector of temperature value that the temperature sensor connects, comparing acquisition.
Further, it includes: to be connected in the torque application structure of the bolt head of the bolt that the torque, which applies structure,
Tightening piece；
The torque measurement structure being connect with the tightening piece；
The retarder being connect with the torque measurement structure；
The motor being connect with the retarder；Wherein,
Motor rotation, drives the retarder to rotate, successively drive the torque measurement structure, the tightening piece,
And rotated with the bolt of tightening piece clamping relative to the internal screw thread test specimen, the torque measurement structure measurement makes
The torque of the bolt fastening.
Further, the torque measurement structure includes: outer corner measurement mechanism, is connected to the retarder and torque sensing
Between device, for measuring the rotational angle of the tightening piece；
The torque sensor is connected between the outer corner measurement mechanism and the tightening piece, for detecting described twist
The torque of tight part.
Further, the fixing piece includes: cushion block test specimen, for plugging the bolt；
The fixed bracket, including two mounting holes, a mounting hole of the cushion block test specimen in described two mounting holes
Middle fixation, the internal screw thread test specimen are assemblied in another mounting hole of described two mounting holes, and along described two mounting holes
The hole wall of another mounting hole pulls and pushes.
Further, the sound wave axle power measuring instrument, the end face of the screw rod of the bolt is fixed on by measuring instrument fixture
On.
Further, the bolt is irony or steel bolt, and the measuring instrument fixture includes: magnet block, the sound wave
Axle power measuring instrument is folded between the end face of the screw rod of the magnet block and the bolt.
Further, the measuring instrument fixture includes: the fixture block with multiple mounting holes, wears the folder by fixing piece
The mounting hole of block, between the end face and the fixture block of screw rod of the fixed sound wave axle power measuring instrument of sandwiched in the bolt.
The embodiment of the present invention also provides a kind of using the measurement side for turning round the measuring device established unprincipled connection such as above-mentioned helicitic texture
Method, wherein include:
Internal screw thread test specimen is set in fixed bracket；
After bolt to be detected is plugged fixing piece, it is connect with the internal screw thread test specimen；
Torque applies torque after applying structure and described be bolted, and the bolt is relative to the internal screw thread test specimen and institute
Fixing piece is stated to tighten；
The torque detected according to torque measurement structure and the pretightning force detected according to sound wave axle power measuring instrument are obtained, institute is obtained
The torsion stated between torque and the pretightning force is established unprincipled connection.
The above-mentioned technical proposal of the embodiment of the present invention has the beneficial effect that:
In the scheme of the embodiment of the present invention, leads to torque and apply structure in the bolt head application torque of bolt, make bolt phase
Generation screw-down torque is tightened for internal screw thread test specimen and fixing piece, the screwing force that bolt is applied is tightened in torque measurement structure measurement
Square, and when bolt is tightened relative to internal screw thread test specimen and fixing piece, sound wave axle power measuring instrument measures the pretightning force on bolt,
Finally the proportionate relationship between torque and pretightning force can be determined by torque and pretightning force.And since the sound wave axle power is surveyed
The end face of the screw rod of bolt is arranged in amount instrument, and the bar for being not take up the screw rod of bolt is long, can survey in this way to shorter bolt
Amount is realized that the more compact helicitic texture of structure is turned round to draw and is closed to eliminate limitation of the axial force sensor thickness to bolt length
The measurement of system.
Detailed description of the invention
Fig. 1 is the torsion drawing testing machine structure schematic diagram that traditional axial force sensor measures pretightning force；
Fig. 2 is that the helicitic texture of the embodiment of the present invention turns round the structural schematic diagram for the measuring device established unprincipled connection；
Fig. 3 is the flow diagram that the helicitic texture of the embodiment of the present invention turns round the measurement method for the measuring device established unprincipled connection.
Description of symbols:
101- internal screw thread test specimen, 102- test specimen cushion block, 103- bolt, 104- axial force sensor, 105- tightening piece, 106- are turned round
Square sensor, 107- motor, 11- bolt, 12- internal screw thread test specimen, 13- cushion block test specimen, 14- sound wave axle power measuring instrument, 15- are fixed
Bracket, 141- measuring instrument fixture, 21- tightening piece, 22- torque sensor, 23- motor, 24- retarder, 25- outer corner measurement machine
Structure.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
As shown in Fig. 2, the helicitic texture of the embodiment of the present invention turns round the measuring device established unprincipled connection, the bolt 11 of most of specification
(being particularly suitable for the shorter bolt 11 of length), it includes: to be provided with and bolt that wherein helicitic texture, which turns round the measuring device established unprincipled connection,
The fixation bracket 15 of the 11 internal screw thread test specimens 12 being coupled；It is set in the fixed bracket 15, bolt 11 plugs fixing piece
Afterwards, the fixing piece being connect with internal screw thread test specimen 12；Apply torque on bolt, make bolt relative to internal screw thread test specimen 12 and fixes
The torque that part is tightened applies structure；Apply structure with torque to connect, for detecting the torque measurement structure of torque；It is fixed on described
On the end face of the screw rod of bolt 11, for detecting the bolt 11 when bolt 11 is tightened relative to internal screw thread test specimen 12 and fixing piece
On pretightning force sound wave axle power measuring instrument 14.
It should be understood that as shown in Fig. 2, internal screw thread test specimen 12 here can fix in bracket 15 shifting that horizontally slip
It is dynamic, but be not able to rotate in fixed bracket 15, to guarantee that internal screw thread test specimen 12 easy to disassemble can remove, not being able to rotate is to prevent
Internal screw thread test specimen 12 is rotated because bolt 11 rotates, and influences normally to measure.
It should be noted that: above-mentioned torque applies structure and is removable installed on bolt 11, during being convenient for measuring,
Measured helicitic texture removes and installs.
In the embodiment of the present invention, structure is applied by torque and applies torque on the bolt head of the bolt 11, makes spiral shell
Bolt 11 tightens generation screw-down torque relative to internal screw thread test specimen 12 and fixing piece, and torque measurement structure measures torque and applies structure
The screw-down torque that torque, i.e. measurement tighten bolt 11, and when bolt 11 is tightened relative to internal screw thread test specimen 12 and fixing piece,
Sound wave axle power measuring instrument 14 measures the pretightning force on bolt, finally can determine torque and pretightning force by torque and pretightning force
Between proportionate relationship.And since the end face of the screw rod of bolt 11 is arranged in the sound wave axle power measuring instrument 14, it is not take up bolt
The bar of 11 screw rod is long, can measure in this way to shorter bolt 11, to eliminate axial force sensor thickness to bolt
The limitation of 11 length realizes that the more compact helicitic texture of structure turns round the measurement established unprincipled connection.
Preferably, the helicitic texture of the embodiment of the present invention is turned round in the measuring device established unprincipled connection, the sound wave axle power measuring instrument
14 be ultrasonic wave axle power measuring instrument.
In the embodiment of the present invention, ultrasonic wave axle power measuring instrument 14 only needs to be connected to the measurement that bolt 11 carries out pretightning force,
The length requirement to bolt 11 can be reduced.
Preferably, the helicitic texture of the embodiment of the present invention is turned round in the measuring device established unprincipled connection, the ultrasonic wave axle power measurement
Instrument includes: the piezoelectric ceramic piece being arranged on the end face of the screw rod of bolt 11；
Sound wave generation/receiver being connect with the piezoelectric ceramic piece, applying voltage signal for the piezoelectric ceramic piece；
And
The temperature sensor of on the end face of the screw rod of the bolt 11, the detection bolt 11 extruder temperature is set
It is being connected with the temperature sensor, compared with acquisition temperature value temperature detector.
In the embodiment of the present invention, by applying voltage letter to the piezoelectric ceramic piece on the screw rod one end for being located at bolt 11
Number, so that piezoelectric ceramic piece generates an acoustic signals, do not apply the of bolt 11 that pretightning force is tightened using acoustic signals measurement
Then one length measures the second length for applying the bolt 11 that pretightning force is tightened, according to the second length, first using acoustic signals
The difference of length, the change and corresponding coefficient of elasticity of the spiro rod length of bolt 11 caused by temperature change calculate and obtain spiral shell
The pretightning force of bolt 11.
It should be understood that specific first length and the second measurement of length are to pass through ultrasound when tightening bolt 11
Wave axle power measuring instrument detects the transmitting of sound wave generation/receiver and receives the time interval of ultrasound, measures the length of bolt 11.
In the embodiment of the present invention, using the size of ultrasonic wave axle power measuring instrument real-time measurement pretightning force, do not need additionally to pacify
Axial force sensor is filled, while cushion block test specimen 13 can be designed accordingly and be processed according to the progress of actual helicitic texture, be made
Measurement result is obtained more to establish unprincipled connection close to true torsion.
In the embodiment of the present invention, when bolt 11 is rotated, sound wave axle power measuring instrument 14 is fixed using measuring instrument fixture,
Sound wave axle power measuring instrument 14 is set to accurately measure pretightning force.
The helicitic texture of the embodiment of the present invention is turned round in the measuring device established unprincipled connection, and it includes: clamping that the torque, which applies structure,
In on the bolt head of bolt 11 tightening piece 21, connect with tightening piece 21 torque measurement structure, with torque measurement structure connect
The retarder 24 connect, the motor 23 being connect with retarder 24；Wherein, the motor 23 rotates, and the retarder 24 is driven to rotate,
Successively drive the torque measurement structure, tightening piece 21 and the bolt 11 being clamped with tightening piece 21 relative to internal screw thread test specimen
12 rotations, the torque that torque measurement structure measurement fastens bolt 11.
It should be understood that the tightening piece 21 is provided with the structure with the cooperation of the bolt head of the bolt 11, it is convenient
The mutual cooperation of tightening piece 21 and bolt 11, that completes bolt 11 tightens installation, and then accurately measures screw-down torque.
Here retarder 24 can be used for reducing by 23 revolving speed of motor, while 23 torque of motor for transmitting and amplifying.
It should also be noted that, the tightening piece 21 is removably connected on the bolt head of bolt 11, not only facilitate survey
It is measured the installation and removal of bolt 11 during amount, and is also beneficial to adjusting tightening piece 21 and is cooperatively connected with bolt 11, mentions
High torque applies the accuracy of the force of structure.
The helicitic texture of the embodiment of the present invention is turned round in the measuring device established unprincipled connection, and the torque measurement structure includes: to connect
It is connected between the retarder 24 and torque sensor 22, the outer corner measurement mechanism of the rotational angle for measuring the tightening piece
25；The torque sensor is connected between outer corner measurement mechanism 25 and tightening piece 21, for detecting the torque of tightening piece 21.
It should be noted that the outer corner measurement mechanism 25 can be angular encoder, to facilitate the measurement to corner.
It should be noted that: the outer corner measurement mechanism 25 can be separately provided, can also be with 22 one of torque sensor
Setting, any mode that record 11 rotational angle of bolt may be implemented, belongs to the protection scope of the embodiment of the present invention, herein not
It illustrates one by one.
In the embodiment of the present invention, carried out by the ultrasonic wave axle power measuring instrument 14 being arranged on the screw rod end face of bolt 11 pre-
Clamp force measurement, while the screw-down torque for tightening bolt 11 is measured by torque sensor 22, also measured using outer corner measurement mechanism
The rotational angle of tightening piece 21, and then the torsion for calculating screw thread is established unprincipled connection.
The helicitic texture of the embodiment of the present invention is turned round in the measuring device established unprincipled connection, and the fixing piece includes: to be set to interior spiral shell
Cushion block test specimen 13 between line test specimen 12 and the bolt head of bolt 11, and bolt 11 plugs cushion block test specimen 13；And including two
The fixation bracket 15 of a mounting hole, cushion block test specimen 13 are fixedly mounted in a mounting hole of two mounting holes in fixed, this is interior
Screw thread test specimen 12 is assemblied in another mounting hole of two mounting holes, and takes out along the hole wall of another mounting hole of two mounting holes
It inserts.
It should be understood that the internal screw thread test specimen 12 can be nut, it is used to cooperate with bolt 11.The cushion block test specimen 13 can
Think backing metal, it is any that simulation actual thread structure operating condition may be implemented for simulating the metal in actual condition by casting die
In metal by the backing metal of casting die, belong to the protection scope of the embodiment of the present invention.
It should be noted that: above-mentioned fixed bracket 15 is also possible to integral support, is also possible to be separated into spiral shell in installation
Second fixed bracket of the fixed bracket of the first of line test specimen 12 and fixed cushion block test specimen 13.As shown in Fig. 2, internal screw thread test specimen 12 fills
It assigned in the fixed bracket in right side (that is, first fixed bracket of fixed bracket 15), and is pulled and pushed along the support bracket fastened hole wall in right side, still
It will not be along the support bracket fastened hole wall rotation in the right side.It can be convenient the installation for realizing bolt 11, and fix 15 size of bracket
It is related with cushion block test specimen 13, any size that the fixation bracket 15 that internal screw thread test specimen 12 and cushion block test specimen 13 are fixed may be implemented,
Belong to the protection scope of the embodiment of the present invention.
It should also be noted that, as shown in Fig. 2, the first fixed bracket and the second fixed bracket can be left along same axis
Right sliding, convenient for the connection and disengaging of tightening piece 21 and 11 head of bolt, convenient for the installation of bolt 11 and internal screw thread test specimen 12.
Preferably, the helicitic texture of the embodiment of the present invention is turned round in the measuring device established unprincipled connection, the sound wave axle power measuring instrument
14, it is fixed on by measuring instrument fixture 141 on the end face of the screw rod of the bolt 11.
The embodiment of the present invention fixes 14 position of sound wave axle power measuring instrument by measuring instrument fixture 141, prevents from measuring
Sound wave axle power measuring instrument 14 shakes and influences the accuracy of measurement data in journey.
Preferably, the helicitic texture of the embodiment of the present invention is turned round in the measuring device established unprincipled connection, the bolt 11 be irony and/or
Steel bolt 11, the measuring instrument fixture 141 include: magnet block, and sound wave axle power measuring instrument 14 is folded in magnet block and bolt 11
Screw rod end face between.
In the embodiment of the present invention, using the material property of bolt 11 itself, pass through magnet block sandwiched sound wave axle power measuring instrument
14, to fix sound wave axle power measuring instrument 14, the structure of such measuring instrument fixture is simple, also user trial is facilitated to operate.
Preferably, the helicitic texture of the embodiment of the present invention is turned round in the measuring device established unprincipled connection, and the measuring instrument fixture 141 wraps
Include: the fixture block with multiple mounting holes wears the mounting hole of the fixture block by fixing piece, sandwiched fixes the sound wave axle power measuring instrument
14 between the end face and the fixture block of the screw rod of the bolt 11.Wherein, which can be the connectors such as screw, be connected with facilitating
It connects.
In the embodiment of the present invention, in 11 non-metallic material of bolt, the fixture block assisted by other is needed, by sound wave axle power
Measuring instrument 14 is fixed on the screw rod end face of bolt 11, prevents the feelings that sound wave axle power measuring instrument 14 shakes and influences measurement
Condition improves the accuracy of measurement.
It should be noted that above-mentioned helicitic texture turns round the measuring device established unprincipled connection, establish unprincipled connection applied to helicitic texture torsion
Measuring machine.
As shown in figure 3, the embodiment of the present invention also provides a kind of measurement dress turned round and established unprincipled connection using such as above-mentioned helicitic texture
The measurement method set, wherein include:
Step 31, internal screw thread test specimen 12 is set in fixed bracket 15.
Step 32, it after bolt 11 to be detected being plugged fixing piece, is connect with internal screw thread test specimen 12.
Step 33, torque applies after structure is connect with bolt 11 and applies torque, bolt 11 relative to internal screw thread test specimen 12 and
Fixing piece is tightened；
Step 34, the torque detected according to torque measurement structure and the preload detected according to sound wave axle power measuring instrument 14 are obtained
Power, the torsion obtained between the torque and the pretightning force are established unprincipled connection.
It should be understood that, by the torque and pretightning force of acquisition, can use electronic equipment meter in step 34 here
It calculates the torsion obtained between torque and pretightning force to establish unprincipled connection, torsion can be accurately obtained in this way and established unprincipled connection.Wherein, electronic equipment can be with
Refer to mobile phone, computer or calculator, does not enumerate herein.
In the embodiment of the present invention, structure is applied by torque and applies torque on the bolt head of the bolt 11, makes spiral shell
Bolt 11 tightens generation screw-down torque relative to internal screw thread test specimen 12 and fixing piece, and torque measurement structure measures torque and applies structure
The screw-down torque that torque, i.e. measurement tighten bolt 11, and when bolt 11 is tightened relative to internal screw thread test specimen 12 and fixing piece,
Sound wave axle power measuring instrument 14 measures the pretightning force on bolt, finally can determine torque and pretightning force by torque and pretightning force
Between proportionate relationship.And since the end face of the screw rod of bolt 11 is arranged in the sound wave axle power measuring instrument 14, it is not take up bolt
The bar of 11 screw rod is long, can measure in this way to shorter bolt 11, to eliminate axial force sensor thickness to bolt
The limitation of 11 length realizes that the more compact helicitic texture of structure turns round the measurement established unprincipled connection.
It is as follows that process description is executed to entire installation using Fig. 2: distinguish first moving fixing support 15 (specifically, for
First fixed bracket moves right, and drives the second fixed bracket to move right, is fitted without measuring instrument fixture 141, sound wave at this time
Axle power measuring instrument 14 and cushion block test specimen 13), then suitable cushion block test specimen 13 and internal screw thread test specimen 12 on clamping；Then by bolt
11 plugged cushion block test specimen 13, manually tightened bolt 11, stopped tightening before generating pretightning force；Subsequently, it is pressed from both sides using measuring instrument
Tool 141 is by 14 clamping of sound wave axle power measuring instrument on the end face of the screw rod of bolt 11；Subsequently, it is moved to the left fixed bracket 15
(specifically, the first fixed bracket is moved to the left, drive the second fixed bracket, cushion block test specimen 13, bolt 11, internal screw thread test specimen 12,
Measuring instrument fixture 141 and sound wave axle power measuring instrument 14 are moved to the left) so that bolt 11 bolt head alignment tightening piece 21 and
It is connect with tightening piece 21；Finally start motor 23, tighten bolt 11 (using pretightning force come fastening bolt 11) using tightening piece 21,
It realizes the screw-down torque and pretightning force of real-time measurement bolt 11, draws pretightning force with the variation relation curve of screw-down torque, obtain
The torsion of bolt 11 is established unprincipled connection.Generally in the case where measurement obtains measurement result, pretightning force is with the variation relation of screw-down torque
Proportional relation.
Correspondingly, the use such as above-mentioned helicitic texture due to the embodiment of the present invention turns round the measurement for the measuring device established unprincipled connection
Method turns round the measuring device established unprincipled connection applied to helicitic texture, therefore above-mentioned helicitic texture turns round the institute for the measuring device established unprincipled connection
It states and realizes that embodiment is suitable for the implementation that for example above-mentioned helicitic texture of the use turns round the measurement method for the measuring device established unprincipled connection
In example, it can also reach identical technical effect.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of helicitic texture turns round the measuring device established unprincipled connection, it is applied to bolt (11), which is characterized in that the helicitic texture is turned round
The measuring device established unprincipled connection includes:
Fixed bracket (15), are set to the fixed bracket (15) with the internal screw thread test specimen (12) that the bolt (11) is coupled
It is interior；
Fixing piece is set in the fixed bracket (15), wherein and described after the bolt (11) plugs the fixing piece
Internal screw thread test specimen (12) connection；
Torque applies structure, applies structure for the torque and applies torque on the bolt (11), makes the bolt (11)
It is tightened relative to the internal screw thread test specimen (12) and the fixing piece；
Torque measurement structure applies structure with the torque and connect, for detecting the torque；
Sound wave axle power measuring instrument (14) is fixed on the end face of the screw rod of the bolt (11), the sound wave axle power measuring instrument
(14) for detecting the bolt when the bolt (11) is tightened relative to the internal screw thread test specimen (12) and the fixing piece
(11) pretightning force on；
Wherein, the fixing piece includes: cushion block test specimen (13), for plugging the bolt；
The fixed bracket (15), including two mounting holes, a peace of the cushion block test specimen (13) in described two mounting holes
It fills in hole and fixes, the internal screw thread test specimen (12) is assemblied in another mounting hole of described two mounting holes, and along described two
The hole wall of another mounting hole of mounting hole pulls and pushes；
It includes: to be connected in the torque application structure tightening piece of the bolt head of the bolt (11) that the torque, which applies structure,
(21)；
The torque measurement structure being connect with the tightening piece (21)；
The retarder (24) being connect with the torque measurement structure；
The motor (23) being connect with the retarder (24)；Wherein,
The motor (23) rotation, drives the retarder (24) to rotate, and successively drives the torque measurement structure, described tightens
Part (21) and the bolt (11) being clamped with the tightening piece (21) are rotated relative to the internal screw thread test specimen (12), institute
State the torque that torque measurement structure measurement fastens the bolt (11)；
The torque measurement structure includes: outer corner measurement mechanism (25), is connected to the retarder (24) and torque sensor
(22) between, for measuring the rotational angle of the tightening piece (21)；
The torque sensor (22), is connected between the outer corner measurement mechanism (25) and the tightening piece (21), for examining
Survey the torque of the tightening piece (21).
2. helicitic texture as described in claim 1 turns round the measuring device established unprincipled connection, which is characterized in that
The sound wave axle power measuring instrument (14) is ultrasonic wave axle power measuring instrument.
3. helicitic texture as claimed in claim 2 turns round the measuring device established unprincipled connection, which is characterized in that
The ultrasonic wave axle power measuring instrument (14) includes: the piezoelectric ceramics being arranged on the end face of the screw rod of the bolt (11)
Piece；
Sound wave generation/receiver being connect with the piezoelectric ceramic piece, applying voltage signal for the piezoelectric ceramic piece；And
The temperature sensor of on the end face of the screw rod of the bolt (11), the detection bolt (11) extruder temperature is set
It is being connected with the temperature sensor, compared with acquisition temperature value temperature detector.
4. helicitic texture as described in any one of claims 1 to 3 turns round the measuring device established unprincipled connection, which is characterized in that the sound
Wave axle power measuring instrument (14) is fixed on the end face of the screw rod of the bolt (11) by measuring instrument fixture (141).
5. helicitic texture as claimed in claim 4 turns round the measuring device established unprincipled connection, which is characterized in that
The bolt (11) is irony or steel bolt, and the measuring instrument fixture (141) includes: magnet block, the sound wave axle power
Measuring instrument (14) is folded between the end face of the screw rod of the magnet block and the bolt (11).
6. helicitic texture as claimed in claim 4 turns round the measuring device established unprincipled connection, which is characterized in that
The measuring instrument fixture (141) includes: the fixture block with multiple mounting holes, and the installation of the fixture block is worn by fixing piece
Hole, between the end face and the fixture block of screw rod of the fixed sound wave axle power measuring instrument (14) of sandwiched in the bolt (11).
7. a kind of measurement method using the measuring device established unprincipled connection such as helicitic texture as claimed in any one of claims 1 to 6 torsion,
It is characterised by comprising:
Internal screw thread test specimen (12) is set in fixed bracket (15)；
After bolt to be detected (11) is plugged fixing piece, it is connect with the internal screw thread test specimen (12)；
Torque applies after structure is connect with the bolt (11) and applies torque, and the bolt (11) is relative to the internal screw thread test specimen
(12) and the fixing piece is tightened；
The torque detected according to torque measurement structure and the pretightning force detected according to sound wave axle power measuring instrument (14) are obtained, institute is obtained
The torsion stated between torque and the pretightning force is established unprincipled connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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