CN207976380U - Testing device for friction coefficient between a kind of mold/filament fiber - Google Patents
Testing device for friction coefficient between a kind of mold/filament fiber Download PDFInfo
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- CN207976380U CN207976380U CN201820171578.7U CN201820171578U CN207976380U CN 207976380 U CN207976380 U CN 207976380U CN 201820171578 U CN201820171578 U CN 201820171578U CN 207976380 U CN207976380 U CN 207976380U
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- Prior art keywords
- tow
- mold
- friction coefficient
- testing device
- glass pane
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Abstract
The utility model is related to testing device for friction coefficient between a kind of mold/filament fiber, are used to measure the practical contact length and frictional force of tow, mounting base and linear stage are individually fixed on pedestal；Lower coated glass pane is placed in mounting base；Upper and lower coated glass pane is oppositely arranged, and tow is fixed between upper and lower coated glass pane；Upper coated glass pane is fixed below cover board；Guide rod is vertically arranged in mounting base, guide rod passes through transverse arm；Compressed spring is arranged on the guide bar, and above transverse arm, can compress transverse arm；Push button weighing sensor is fixed on transverse arm, and spherical tips pressure is on the cover board；Tow is clamped in double fastener clamper, connects load cell；Load cell is mounted in the linear stage of screw drive；Motor is connect with screw rod, and drive screw turns.The utility model is simple in structure, easy to use, and test method considers practical tow contact length, so that frictional force result is accurate, improves the quality of product.
Description
【Technical field】
The utility model is related to a kind of testing device for friction coefficient, and in particular to a kind of to consider practical tow contact length
Testing device for friction coefficient between mold/filament fiber belongs to textile machine physical characteristic technical field of measurement and test.
【Background technology】
Using aerospace and automobile as the field of traffic of representative, there is the fiber reinforced polymeric of high specific strength and specific modulus
The use of object composite material is increasingly extensive, this needs efficient part processing method.Relatively with pre-preg fabric manufacture, make
Preform is manufactured with dry fibers, the processing method of composite material parts is then obtained by resin transfer molding (RTM)
With production efficiency it is high significantly a little, be particularly suitable for large-scale industrial production requirement.
However preform, in forming process, the local deformation generated by the effect of model is micro- for final component
It is vital to see structure and military service performance.So the power in accurate description system is necessary to prediction of distortion, and rub
It is exactly the main power of one of which to wipe power.Friction formula F=μ FNIt is the most common formula for measuring frictional force, from the formula
It can be seen that frictional force is related with the pressure that object is subject to.But it is the object with continuous surface usually to measure frictional force with the formula
Body, and filament fiber and do not have continuous surface, therefore simply rubbing between fiber and model cannot be analyzed with the formula
Wipe coefficient.
Correlative study shows that the real contact area between fiber and model is the important of decision friction behavior between the two
Factor, main reason is that not such as Fig. 1 (a) is shown for contact situation of the filament fiber with mold, actual contact situation such as Fig. 1
(b) shown in.For now, it is impossible directly to measure real contact area, but can be by measuring practical contact length
It spends to obtain real contact area.So, shadow of the practical contact length for analysis frictional force of tow filament fiber is measured
It is just particularly important for the factor of sound.
Fiber friction force test equipment at this stage does not consider real contact area to frictional force when measuring friction coefficient
Influence, therefore for explaining that the explanation for the factor for influencing frictional force is inaccurate, influence the design production of part.
Therefore, to solve the above problems, it is necessory to provide testing device for friction coefficient between a kind of mold/filament fiber,
To overcome the defect in the prior art.
【Utility model content】
To solve the above problems, the purpose of this utility model is to provide a kind of moulds considering practical tow contact length
Testing device for friction coefficient between tool/filament fiber.
To achieve the above object, the technical solution that the utility model is taken is：Friction coefficient between a kind of mold/filament fiber
Test device is used to measure the practical contact length and frictional force of tow comprising pedestal, cover board, transverse arm, compressed spring,
It is push button weighing sensor, upper coated glass pane, lower coated glass pane, mounting base, double fastener clamper, load cell, linear
Platform and motor；Wherein, the mounting base and linear stage are individually fixed on pedestal；The lower coated glass pane is placed in peace
It fills on seat；The upper coated glass pane and lower coated glass pane are oppositely arranged, and tow is fixed on coated glass pane and lower plated film
Between glass plate；The upper coated glass pane is fixed below cover board；Guide rod is vertically arranged in the mounting base, it is described to lead
Transverse arm is passed through to bar；The compressed spring is arranged on the guide bar, and above transverse arm, can compress transverse arm；The button
Formula weighing sensor is fixed on transverse arm, and spherical tips pressure is on the cover board；Tow is clamped in the double fastener clamper, and connection is surveyed
Force snesor；The load cell is mounted in the linear stage of screw drive；The motor is connect with screw rod, and drives spiral shell
Bar rotates.
Testing device for friction coefficient is further arranged between the mold/filament fiber of the utility model：The compressed spring
It is installed on the left and right sides above transverse arm.
Testing device for friction coefficient is further arranged between the mold/filament fiber of the utility model：The push button claims
It retransmits there are two sensors, is separately fixed on two transverse arms middle and symmetrical, the reading of two sensors is identical.
Testing device for friction coefficient is further arranged between the mold/filament fiber of the utility model：It is set on the cover board
There is a window, for beneath window by tow, top is equipped with microscope, and digital camera is equipped on microscope.
Testing device for friction coefficient is further arranged between the mold/filament fiber of the utility model：The upper plated film glass
Glass plate is soda-lime glass, and bottom is coated with optical thin film；The optical thin film has two layers：The chromium base of 8nm and 140nm's is outer
Layer, and contacted with tow.
Testing device for friction coefficient is further arranged between the mold/filament fiber of the utility model：The lower plated film glass
Glass plate side is provided with rounded corner.
Testing device for friction coefficient is further arranged between the mold/filament fiber of the utility model：The upper plated film glass
A block is fixed in glass plate.
Testing device for friction coefficient is also configured between the mold/filament fiber of the utility model：The load cell connects
It is connected to a fixed block, fixed block is connected on link block；The link block and screw rod bolt, the screw rod rotation can the company of driving
Connect block linear motion.
Compared with prior art, the utility model has the advantages that：Between the mold/filament fiber of the utility model
Testing device for friction coefficient is simple in structure, easy to use, and test method considers practical tow contact length, so that rubbing
It is accurate to wipe power result, improves the quality of product.
【Description of the drawings】
Fig. 1 (a), Fig. 1 (b) be respectively the utility model mold/filament fiber between testing device for friction coefficient contact
The desired contact figure and practical hookup of the long filament in area.
Fig. 2 be the utility model mold/filament fiber between testing device for friction coefficient side view.
Fig. 3 be the utility model mold/filament fiber between testing device for friction coefficient front view.
Fig. 4 be the utility model mold/filament fiber between upper coated glass pane and painting in testing device for friction coefficient
Overlay on optical thin film figure thereon.
【Specific implementation mode】
It please refers to shown in Figure of description 2 to attached drawing 4, a kind of the utility model friction coefficient between mold/filament fiber
Test device is used to measure the practical contact length and frictional force of tow 9, mainly by pedestal 16, cover board 2, transverse arm 7, pressure
Contracting spring 5, upper coated glass pane 4, lower coated glass pane 1, mounting base 6, double fastener clamper 10, is surveyed push button weighing sensor 3
A few part compositions such as force snesor 11, linear stage 14 and motor 15.
Wherein, the mounting base 6 and linear stage 14 are individually fixed on pedestal 16.
The lower coated glass pane 1 is placed in mounting base 6.The upper coated glass pane 4 and lower coated glass pane 1 are set relatively
It sets, tow 9 is fixed between coated glass pane 4 and lower coated glass pane 1.Further, 1 side of lower coated glass pane
It is provided with rounded corner, edge effect when frictional force is surveyed for eliminating.
The upper coated glass pane 4 is fixed on 2 lower section of cover board.The upper coated glass pane 4 is soda-lime glass 19, bottom
It is coated with optical thin film；The optical thin film has two layers：The chromium base 20 of 8nm and the outer layer 21 of 140nm, and contacted with tow,
To change the refracting characteristic of glass plate so that only with contact glass sheet to tow 9 be revealed.The upper plated film glass
A block 8 is fixed in glass plate 4, moving horizontally during can preventing tow 9 from pulling out.
Guide rod 24 is vertically arranged in the mounting base 6, the guide rod 24 passes through transverse arm 7.5 sets of the compressed spring
It is located on guide rod 24, and positioned at 7 top of transverse arm, transverse arm 7 can be compressed downwards, to apply extra load.Specifically, described
Compressed spring 5 is installed on the 7 top left and right sides of transverse arm so that the extra load anterior-posterior balance of application.
The push button weighing sensor 3 is fixed on transverse arm 7, and spherical tips are pressed on cover board 2.The push button claims
It retransmits there are two sensors 3, is separately fixed on two transverse arms 7 middle and symmetrical, the reading of two sensors 3 is identical, it is ensured that
Upper coated glass pane 4 and lower 1 keeping parallelism of coated glass pane also ensure that the load load of tow 9 is uniform.
The cover board 2 is equipped with a window 25, and for 25 lower section of window by tow 9, top is equipped with microscope 18, microscope 18
On digital camera (not shown) is installed.After microscope 18 is scanned contact zone, digital camera is just to scanning situation
Carry out that takes pictures
Tow 9 is clamped in the double fastener clamper 10, connects load cell 11.The load cell 11 is mounted on spiral shell
In the linear stage 14 that bar 13 drives, load data can be measured.Specifically, the load cell 11 is connected to a fixation
Block 12, fixed block 12 are connected on link block 17；13 bolt of the link block 17 and screw rod, the rotation of the screw rod 13 can drive
Link block 17 moves along a straight line.
The motor 15 is connect with screw rod 13, and screw rod 13 is driven to rotate, and is drivingly connected block 17 successively by screw rod 13, is consolidated
Determine block 12, load cell 11 and double fastener clamper 10, double fastener clamper 10 pulls tow 9.
Friction coefficient testing method is carried out such as using testing device for friction coefficient between the mold/filament fiber of the utility model
Under：
1) tow 9 that suitable length, is cut from tow volume, tow 9 is clamped on double fastener clamper 10, and is placed into
On lower coated glass pane 1；Then, upper coated glass pane 4 is fixed on cover board 2, the optical thin film on upper coated glass pane 4
20,21 tow 9 is touched.
2) four compressed springs 5, are tightened to apply additional load so that the spherical shape of two push button weighing sensors 3
Top is pressed onto on cover board 2.
3), test device is put under microscope 18, microscope 18 is directed at the contact zone of tow 9 and optical thin film 20,21；
Due to the window 25 in cover board 2 so that the visible microscope in contact zone 18.Obtained image, which clearly demonstrates, individually to be contacted
Filament.Since microscope 18 is imaged by the upper coated glass pane 4 being pressed on tow 9, the optical thin film on upper coated glass pane 4
For special semi-reflective coating layer, the refracting characteristic of glass plate is changed so that the long filament only contacted with optical thin film is highlighted
Display.
4), start motor 15, tow 9 is pulled out by designated length in the case of each normal load with the speed of setting
(such as 1mm), experiment carry out normal load step several times, carry out microscope 18 to tow 9 and optical thin film contact zone every time
Photo is observed and taken, and pulling force is obtained using load cell 11.
5), frictional force is caused by the bonding shear stress τ on real contact area A, so Frictional force gauge is shown as：
F=τ A；Wherein, τ=constant, A=2aL；Contact half-breadthWherein, total normal load of the contact zones W=, d
=strand diameters, E*=effective modulus of elasticity；Wherein, VGlass=coated glass is moored
Loose ratio, EGlass=coated glass elasticity modulus, VF=filament fiber Poisson's ratio, EF=filament fiber elasticity modulus.
Further, the photo of tow contact zone is obtained by step 4, since the long filament seen in photo is without so bright
It is aobvious, so needing to handle photo.The practical contact total length L of tow can be obtained after processing.Specifically, the tow
Length L measurement methods are as follows：
1) photo background colour, is switched into gray scale, and removes the uneven background caused by light source；
2) the square mode filter of 41 × 41 pixels, is created, and the wide horizontal wave band of 3 pixels is created intermediate
In；
3), by 1 ° of white band rotation in filter, and replicate analysis highlights the another of object to obtain with 1 ° of direction
One image；It repeats the above process, filter rotates between 0 to 90 °, and step-length is 1 °；
4) 91 images, are obtained with step 3；
5) length and the direction of the long filament highlighted in image, are measured.
Above specific implementation mode is only the preferred embodiment of this creation, all in this wound not to limit this creation
Any modification, equivalent substitution, improvement and etc. done within the spirit and principle of work, should be included in this creation protection domain it
It is interior.
Claims (8)
1. testing device for friction coefficient between a kind of mold/filament fiber is used to measure practical contact length and the friction of tow
Power, it is characterised in that：Including pedestal, cover board, transverse arm, compressed spring, push button weighing sensor, upper coated glass pane, lower plating
Film glass plate, mounting base, double fastener clamper, load cell, linear stage and motor；Wherein, the mounting base and linear
Platform is individually fixed on pedestal；The lower coated glass pane is placed in mounting base；The upper coated glass pane and lower plated film glass
Glass plate is oppositely arranged, and tow is fixed between coated glass pane and lower coated glass pane；The upper coated glass pane is fixed on
Below cover board；Guide rod is vertically arranged in the mounting base, the guide rod passes through transverse arm；The compressed spring, which is set in, to be led
To on bar, and above transverse arm, transverse arm can be compressed；The push button weighing sensor is fixed on transverse arm, dome
Side pressure is on the cover board；Tow is clamped in the double fastener clamper, connects load cell；The load cell is mounted on screw rod
In the linear stage of driving；The motor is connect with screw rod, and drive screw turns.
2. testing device for friction coefficient between mold/filament fiber as described in claim 1, it is characterised in that：The compression bullet
Spring is installed on the left and right sides above transverse arm.
3. testing device for friction coefficient between mold/filament fiber as described in claim 1, it is characterised in that：The push button
There are two weighing sensors, is separately fixed on two transverse arms middle and symmetrical, the reading of two sensors is identical.
4. testing device for friction coefficient between mold/filament fiber as described in claim 1, it is characterised in that：On the cover board
Equipped with a window, for beneath window by tow, top is equipped with microscope, and digital camera is equipped on microscope.
5. testing device for friction coefficient between mold/filament fiber as described in claim 1, it is characterised in that：The upper plated film
Glass plate is soda-lime glass, and bottom is coated with optical thin film；The optical thin film has two layers：The chromium base of 8nm and 140nm's is outer
Layer, and contacted with tow.
6. testing device for friction coefficient between mold/filament fiber as described in claim 1, it is characterised in that：The lower plated film
Glass plate side is provided with rounded corner.
7. testing device for friction coefficient between mold/filament fiber as described in claim 1, it is characterised in that：The upper plated film
A block is fixed on glass plate.
8. testing device for friction coefficient between mold/filament fiber as described in claim 1, it is characterised in that：The dynamometry passes
Sensor is connected to a fixed block, and fixed block is connected on link block；The link block and screw rod bolt, the screw rod rotate energy
It is drivingly connected block linear motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820171578.7U CN207976380U (en) | 2018-02-01 | 2018-02-01 | Testing device for friction coefficient between a kind of mold/filament fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820171578.7U CN207976380U (en) | 2018-02-01 | 2018-02-01 | Testing device for friction coefficient between a kind of mold/filament fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207976380U true CN207976380U (en) | 2018-10-16 |
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ID=63766534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820171578.7U Expired - Fee Related CN207976380U (en) | 2018-02-01 | 2018-02-01 | Testing device for friction coefficient between a kind of mold/filament fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207976380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169120A (en) * | 2018-02-01 | 2018-06-15 | 浙江理工大学 | Testing device for friction coefficient and its test method between a kind of mold/filament fiber |
-
2018
- 2018-02-01 CN CN201820171578.7U patent/CN207976380U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169120A (en) * | 2018-02-01 | 2018-06-15 | 浙江理工大学 | Testing device for friction coefficient and its test method between a kind of mold/filament fiber |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181016 Termination date: 20220201 |