CN108680498A - A kind of carbon fiber friction coefficient testing device and method - Google Patents
A kind of carbon fiber friction coefficient testing device and method Download PDFInfo
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- CN108680498A CN108680498A CN201810908139.4A CN201810908139A CN108680498A CN 108680498 A CN108680498 A CN 108680498A CN 201810908139 A CN201810908139 A CN 201810908139A CN 108680498 A CN108680498 A CN 108680498A
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- carbon fiber
- friction roller
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
Abstract
A kind of carbon fiber friction coefficient testing device of present invention offer and method, including motor control box, friction roller control cabinet and equal a pair of of the clips of load, it is placed with motor inside the motor control box, the friction roller control cabinet be equipped with can electromagnetic heating friction roller, the friction roller is connected by drive link with the motor, motor driving institute friction roller is rotated, carbon fiber is suspended on the friction roller, the clips include the first clips and the second clips, suspension is arranged at the both ends of the carbon fiber respectively, second clips connect force snesor, the force snesor connects computer.The present invention main testing procedure include：Each technical parameter before setting test, tests various carbon fibers at a set temperature, by connect computer can real-time display frictional force and time change curve, automatically analyze the friction coefficient of carbon fiber, measuring accuracy is high, easy to operate, quick.
Description
Technical field
The present invention relates to carbon fiber processing performance analysis test evaluation technical fields, and in particular to one kind is tested under controllable temperature
The device and method of carbon fiber friction coefficient.
Background technology
The frictional property of carbon fiber refers to that carbon fiber contacts with other material surfaces with carbon fiber or carbon fiber and occurs opposite
Behavior when movement is one of most important processing performance of carbon fiber.The frictional behaviour of carbon fiber not only influences production and processing property
Can, and influence the appearance of product.For example, when producing carbon fiber, if the friction coefficient of carbon fibre tow has differences, respectively
The exhibition yarn of a tow also can difference, the big exhibition yarn of friction coefficient is difficult, and then influences the production of carbon fiber prepreg, leads
Prepreg is caused phenomena such as stowing, water ripples occur.Therefore, to the research of the test device and test method of carbon fiber friction coefficient
It is of great significance.
Currently, in general fibre frictoin performance test field, capstan winch method Y151 fiber type frictionmeters are mostly used,
It reads friction force value using weighing scale to test twisting force, and friction coefficient then is calculated by formula.But this equipment is not particularly suited for carbon
On the one hand the measurement of frictional coefficient of fiber is since there are some disadvantages, such as force value of weighing scale to test twisting force to differentiate for this test equipment
Rate is relatively low（0.5×10-3cN）, force measurement range is smaller（250×10-3cN）, rotate weighing scale to test twisting force handle and artificial range estimation
Reading may cause operating error, and more demanding to the qualification of operating personnel, running part is using gear shift, instrument
Device is easy to happen failure, without temperature control device etc..On the other hand, come from the factor of carbon fiber itself, carbon fiber is not
It is same as other fibers, filament diameter very little, only about 5~7 μm, and since modulus of carbon fibres is higher, so brittleness is bright
It is aobvious to be more than other fibers.Carbon fiber surface is coated with one layer of sizing agent simultaneously, it is therefore an objective to protect carbon fiber and carbon fiber is made to have
Convergence, so, what device need to measure is the friction coefficient for the carbon fiber that surface has coated sizing agent.But the property of sizing agent by
The height of the influence of temperature, temperature influences the size of its viscosity, to influence the frictional force of carbon fiber.In addition, carbon fiber is pre-
The production of leaching material is also required to suitable carbon fiber friction power, and the influence of temperature is vital.Therefore, according to above-mentioned carbon fiber
The testing requirement of friction coefficient, there is an urgent need to a kind of high-precision, easy to operate, quick and temperature-controllable carbon fiber friction coefficients
Analyzer.
In view of the foregoing, the present invention propose it is a kind of under controllable temperature test carbon fiber friction coefficient device and side
Method.The present invention can measure the friction coefficient of carbon fiber at different temperatures, be provided for the production and evaluation of carbon fiber and prepreg
Exact reference data reduces research and development and the production cost of carbon fiber and prepreg, and device is easy to operate, quick and easy,
Measuring accuracy is higher.
Invention content
The object of the present invention is to provide a kind of carbon fiber friction coefficient testing device and methods, can measure temperature-changeable
The friction coefficient of the lower carbon fiber of degree.By connect computer can real-time display frictional force and time change curve, automatically analyze
The friction coefficient of carbon fiber, measuring accuracy is high, easy to operate, quick.
Technical solution of the invention is：A kind of carbon fiber friction coefficient testing device, including motor control box, friction
Roller control cabinet and load equal a pair of of clips are placed with motor, the friction roller control cabinet inside the motor control box
Be equipped with can electromagnetic heating friction roller, the friction roller is connected by drive link with the motor, and the motor drives and rubbed
It wipes roller to be rotated, carbon fiber is suspended on the friction roller, and the clips include the first clips and the second clips, are divided
Xuan Gua it not be arranged at the both ends of the carbon fiber, second clips connect force snesor, and the force snesor connection calculates
Machine.
Further improvement of the present invention is：The motor control box babinet is equipped with power knob and motor control plane
Plate, the control panel for motor include the No.1 LED display that can set, adjust and show motor speed,
Further improvement of the present invention is：The babinet of the friction roller control cabinet is equipped with power switch and temperature control plane
Plate, the temperature control panel includes No. two LED displays that can set, adjust and show friction roll temperature, wherein described rub
The temperature setting for wiping roller is up to 150 DEG C, 0.5 DEG C of precision.
Further improvement of the present invention is：The friction roller is metal material, chrome-faced, diameter 50mm, length
200mm, surface roughness Rmax are 3 μm, and radial oscillating quantity is not more than 0.5mm in friction roller rotation process.
Further improvement of the present invention is：The range of speeds of the motor is 0 ~ 1000r/min.
Further improvement of the present invention is：The force value resolution ratio of the force snesor is less than 0.25 × 10-3CN, force value are surveyed
Determine range and is more than 1000 × 10-3CN, the load signal of measurement are transmitted in computer, data after analyzing processing with frictional force-when
The form of half interval contour is output in display, and forms paper document by printer.
Further improvement of the present invention is：The tension clip load is 100 × 10-3cN、200×10-3cN、500×10-3One kind in cN.
Further improvement of the present invention is：A kind of test method of carbon fiber friction coefficient testing device, including it is following
Specific steps：
（1）Test before first carbon fiber friction coefficient testing device is fixed in horizontal table top, maintain test room temperature and
Moisture constant, room temperature are 20 DEG C ± 2 DEG C, and relative humidity is 45% ± 3%；
（2）It turns on the power switch, adjusts friction roller temperature control panel, select a specific temperature, state maintains 5 minutes；
（3）Take the smooth carbon fibre tow of about 20cm one section long, it is ensured that its is smooth, and nothing is turned over, the electromagnetism that hangs on of Twisting adds
On thermal friction roller, make the equal length that both ends are sagging, the first clips of equal loads and the second clips are hung on into carbon fiber
Tow both ends, wherein the second clips connect with force snesor and mutually fix；
（4）Power knob is opened, regulation motor control panel selectes suitable motor speed；
（5）When motor rotates, friction roll shaft follows suit does constant speed revolution clockwise, since carbon fiber and surface of friction roller exist
Frictional force, makes the heterotonia at carbon fibre tow both ends, is indicated respectively with f1 and f2, f is tension clip load, wherein f1>F2,
The load signal that computer receives force snesor at this time is f0, then f0=f1-f2, and according to Euler's formula, carbon fiber is in friction roller
On friction coefficient can be calculated with following formula：
In equation：F1, f2 are the tension suffered by the carbon fiber of friction roller both ends；Cornerites of the θ between carbon fiber and friction roller；E is
Natural constant；Friction coefficient of the μ between carbon fiber and friction roller.
When θ=180 °, θ=π, then
For ease of calculation, natural logrithm ln is converted into the common logarithm lg with 10 bottom of for, then can obtained：
（6）Computer automatic analysis load-time graph, obtains the frictional force of carbon fiber, and carbon is calculated according to above-mentioned formula
Frictional coefficient of fiber。
The beneficial effects of the invention are as follows：A kind of carbon fiber friction coefficient testing device of present invention offer and method, can test
The friction coefficient of fiber carbon fiber under variable temperature, can real-time display frictional force and the variation of time song by connecting computer
Line automatically analyzes the friction coefficient of carbon fiber, and measuring accuracy is high, easy to operate, quick.For carbon fiber and carbon fiber prepreg
Production and evaluation provide exact reference data, reduce research and development and the production cost of carbon fiber and prepreg.
Description of the drawings
Fig. 1 is the schematic diagram that carbon fiber friction coefficient unit is tested under controllable temperature
Fig. 2 is the schematic diagram that carbon fiber friction coefficient unit friction roller partial cross section is tested under controllable temperature
Wherein, 1- motor control box, 2- drive links, 3- friction roller control cabinets, 4- carbon fibre tows, 5- friction rollers, 6- power sensing
Device, the first clips of 7-, the second clips of 8-, 9- temperature control panels, 10- power switches, 11- motors, 12- power knobs,
13- control panel for motor, 14- computers, 15- displays, 16- printers.
Specific implementation mode
In order to deepen the present invention understanding, the present invention is described in further detail below in conjunction with drawings and examples,
The embodiment is only for explaining the present invention, does not constitute and limits to protection scope of the present invention.
Embodiment 1
The present embodiment provides a kind of carbon fiber friction coefficient testing devices, as shown in Figure 1, including motor control box 1, friction roller control
Case 3 processed a pair of of the clips equal with load are placed with motor 11,1 case of the motor control box inside the motor control box 1
Body is equipped with power knob 12 and control panel for motor 13, and the control panel for motor 13 includes that can set, adjust and show
The No.1 LED display of motor speed.
The friction roller control cabinet 3 be equipped with can electromagnetic heating friction roller 5, on the babinet of the friction roller control cabinet 3
Equipped with power switch 10 and temperature control panel 9, the temperature control panel 9 includes that can set, adjust and show friction roller temperature
No. two LED displays of degree.The friction roller 5 is metal material, chrome-faced, diameter 50mm, length 200mm, rough surface
It is 3 μm to spend Rmax, and radial oscillating quantity is not more than 0.5mm, the temperature setting highest of the friction roller 5 in 5 rotation process of friction roller
It it is 150 DEG C, 0.5 DEG C of precision, the friction roller 5 is connected by drive link 2 with the motor 11, and the driving of the motor 11 is rubbed
Roller 3 is rotated, and carbon fibre tow 4 is suspended on the friction roller 5, and the clips include the first clips 7 and second
Power folder 8, respectively suspension are arranged at the both ends of the carbon fibre tow 4, and second clips 8 connect force snesor 6, the power
Sensor 6 connects computer 14.
The present embodiment provides a kind of test methods of carbon fiber friction coefficient testing device, including step in detail below：
（1）Test before first carbon fiber friction coefficient testing device is fixed in horizontal table top, maintain test room temperature and
Moisture constant, room temperature are 20 DEG C ± 2 DEG C, and relative humidity is 45% ± 3%；
（2）10 are turned on the power switch, friction roller temperature control panel 9 is adjusted, selected temperature is 50 DEG C, and state maintains 5 minutes；
（3）Same model is chosen with a batch of 3 ingot of HF10-3K-A carbon fibers, the smooth carbon fiber of one section of long 20cm is taken per ingot
Tow 4 is tieed up, hangs on electromagnetic heating friction roller [5], makes the equal length that both ends are sagging, is 200 × 10 by load-3The of cN
One clips 7 and the second clips 8 are hung on the both ends of carbon fibre tow 4 respectively；
（4）Power knob 12 is opened, regulation motor control panel 13, it is 30r/min to select motor speed；
（5）When motor rotates as shown in Figure 2, friction roll shaft follows suit does constant speed revolution clockwise, due to carbon fiber and friction
There is frictional force for roller surface, make the heterotonia at 4 both ends of carbon fibre tow, computer 14 receives force snesor 6 at this time
Load signal, computer automatic analysis load-time graph obtain the frictional force of above-mentioned 3 sections of carbon fibers, are calculated according to formula
Obtaining carbon fiber friction coefficient is respectively：
μ1=0.3370、μ2=0.3458、μ3=0.3226, it averages and obtains friction coefficient μ=0.3351 of the ingot fiber.
The advantageous effect of the present embodiment is：A kind of carbon fiber friction coefficient testing device of present invention offer and method, can survey
Try fiber carbon fiber under variable temperature friction coefficient, by connect computer can real-time display frictional force and time variation
Curve automatically analyzes the friction coefficient of carbon fiber, and measuring accuracy is high, easy to operate, quick.For carbon fiber and carbon fiber prepreg
Production and evaluation provide exact reference data, reduce research and development and the production cost of carbon fiber and prepreg.
Implement example 2
A kind of test method of carbon fiber friction coefficient testing device, including step in detail below：
（1）Test before first carbon fiber friction coefficient testing device is fixed in horizontal table top, maintain test room temperature and
Moisture constant, room temperature are 20 DEG C ± 2 DEG C, and relative humidity is 45% ± 3%；
（2）10 are turned on the power switch, friction roller temperature control panel 9 is adjusted, selected temperature is 50 DEG C, and state maintains 5 minutes；
（3）Same model is chosen with a batch of 3 ingot of HF30S-12K-H carbon fibers, the smooth carbon of one section of long 20cm is taken per ingot
Fibre bundle 4 is hung on electromagnetic heating friction roller 5, makes the equal length that both ends are sagging, is 200 × 10 by load-3The of cN
One clips 7 and the second clips 8 are hung on the both ends of carbon fibre tow 4 respectively；
（4）Power knob 12 is opened, regulation motor control panel 13, it is 20r/min to select motor speed；
（5）When motor 11 rotates, friction roll shaft follows suit does constant speed revolution clockwise, due to carbon fiber and 5 surface of friction roller
There is frictional force, make the heterotonia at 4 both ends of carbon fibre tow, and computer 14 receives the load letter of force snesor 6 at this time
Number, computer automatic analysis load-time graph obtains the frictional force of above-mentioned 3 sections of carbon fibers, carbon is calculated according to formula
Frictional coefficient of fiber is respectively：
μ1=0.4435、μ2=0.4577、μ3=0.4228, it averages and obtains friction coefficient μ=0.4413 of the ingot fiber.
Implement example 3
A kind of test method of carbon fiber friction coefficient testing device, including step in detail below：
（1）Test before first carbon fiber friction coefficient testing device is fixed in horizontal table top, maintain test room temperature and
Moisture constant, room temperature are 20 DEG C ± 2 DEG C, and relative humidity is 45% ± 3%；
（2）It turns on the power switch [10], adjusts friction roller temperature control panel [9], selected temperature is 120 DEG C, and state maintains 5 points
Clock；
（3）Same model is chosen with a batch of 3 ingot of HF40S-12K-G carbon fibers, the smooth carbon of one section of long 20cm is taken per ingot
Fibre bundle 4 hangs on electromagnetic heating friction roller [5], makes the equal length that both ends are sagging, is 500 × 10 by load-3CN's
First clips 7 and the second clips 8 are hung on the both ends of carbon fibre tow 4 respectively；
（4）Power knob 12 is opened, regulation motor control panel 13, it is 30r/min to select motor speed；
（5）When motor 11 rotates, friction roll shaft follows suit does constant speed revolution clockwise, due to carbon fiber and 5 surface of friction roller
There is frictional force, make the heterotonia at 4 both ends of carbon fibre tow, and computer 14 receives the load letter of force snesor 6 at this time
Number, computer automatic analysis load-time graph obtains the frictional force of above-mentioned 3 sections of carbon fibers, carbon is calculated according to formula
Frictional coefficient of fiber is respectively：
μ1=0.3970、μ2=0.4158、μ3=0.4090, it averages and obtains friction coefficient μ=0.4072 of the ingot fiber.
The technical staff of industry is it should be appreciated that the present invention is not limited to the above embodiments, above embodiments and description
Described in merely illustrate the principles of the invention, without departing from the spirit and scope of the present invention, the present invention also has respectively
Kind changes and improvements, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by
Appended claims and its equivalent thereof.
Claims (8)
1. a kind of carbon fiber friction coefficient testing device, it is characterised in that：Including motor control box, friction roller control cabinet and load
Equal a pair of of clips, are placed with motor inside the motor control box, the friction roller control cabinet be equipped with can electromagnetism add
The friction roller of heat, the friction roller are connected by drive link with the motor, and motor driving institute friction roller is rotated, carbon
For fabric suspension on the friction roller, the clips include the first clips and the second clips, and suspension respectively is arranged in institute
The both ends of carbon fiber are stated, second clips connect force snesor, and the force snesor connects computer.
2. a kind of carbon fiber friction coefficient testing device according to claim 1, it is characterised in that：The motor control box
Babinet is equipped with power knob and control panel for motor, and the control panel for motor includes that can set, adjust and show motor
The No.1 LED display of rotating speed.
3. a kind of carbon fiber friction coefficient testing device according to claim 1, it is characterised in that：The friction roller control
The babinet of case is equipped with power switch and temperature control panel, and the temperature control panel includes that can set, adjust and show to rub
No. two LED displays of roll temperature are wiped, wherein the temperature setting of the friction roller is up to 150 DEG C, 0.5 DEG C of precision.
4. a kind of carbon fiber friction coefficient testing device according to claim 1, it is characterised in that：The friction roller is gold
Belong to material, chrome-faced, diameter 50mm, length 200mm, surface roughness Rmax is 3 μm, is radially put in friction roller rotation process
Momentum is not more than 0.5mm.
5. a kind of carbon fiber friction coefficient testing device according to claim 1, it is characterised in that：The rotating speed of the motor
Ranging from 0 ~ 1000r/min.
6. a kind of carbon fiber friction coefficient testing device according to claim 1, it is characterised in that：The force snesor
Force value resolution ratio is less than 0.25 × 10-3CN, force value measurement range are more than 1000 × 10-3The load signal of cN, measurement are transmitted in meter
Calculation machine, data are output in display or printer after analyzing processing.
7. a kind of carbon fiber friction coefficient testing device according to claim 1, it is characterised in that：The tension clip load
It is 100 × 10-3cN、200×10-3cN、500×10-3One kind in cN.
8. a kind of test method of carbon fiber friction coefficient testing device according to claim 1, it is characterised in that：Including
Step in detail below：
（1）Test before first carbon fiber friction coefficient testing device is fixed in horizontal table top, maintain test room temperature and
Moisture constant, room temperature are 20 DEG C ± 2 DEG C, and relative humidity is 45% ± 3%；
（2）It turns on the power switch, adjusts friction roller temperature control panel, select a specific temperature, state maintains 5 minutes；
（3）The smooth carbon fibre tow for taking about 20cm one section long, hangs on electromagnetic heating friction roller, makes the length that both ends are sagging
Spend equal, the first clips of equal loads and the second clips hung on into carbon fibre tow both ends, wherein the second clips with
Force snesor connection is mutually fixed；
（4）Power knob is opened, regulation motor control panel selectes suitable motor speed；
（5）When motor rotates, friction roll shaft follows suit does constant speed revolution clockwise, since carbon fiber and surface of friction roller exist
Frictional force, makes the heterotonia at carbon fibre tow both ends, is indicated respectively with f1 and f2, f is tension clip load, wherein f1>F2,
The load signal that computer receives force snesor at this time is f0, then f0=f1-f2, and according to Euler's formula, carbon fiber is in friction roller
On friction coefficient can be calculated with following formula：
In equation：F1, f2 are the tension suffered by the carbon fiber of friction roller both ends；Cornerites of the θ between carbon fiber and friction roller；E is
Natural constant；Friction coefficient of the μ between carbon fiber and friction roller,
When θ=180 °, θ=π, then
For ease of calculation, natural logrithm ln is converted into the common logarithm lg with 10 bottom of for, then can obtained：
（6）Computer automatic analysis load-time graph, obtains the frictional force of carbon fiber, and carbon is calculated according to above-mentioned formula
Frictional coefficient of fiber。
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| CN110261298A (en) * | 2019-07-18 | 2019-09-20 | 天津工业大学 | A kind of test method of fiber interfascicular frictional behaviour |
| CN111537435A (en) * | 2020-04-07 | 2020-08-14 | 国网河南省电力公司电力科学研究院 | Device and method for testing friction coefficient of stranded wire and splicing fitting sleeve |
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| CN110261298A (en) * | 2019-07-18 | 2019-09-20 | 天津工业大学 | A kind of test method of fiber interfascicular frictional behaviour |
| CN111537435A (en) * | 2020-04-07 | 2020-08-14 | 国网河南省电力公司电力科学研究院 | Device and method for testing friction coefficient of stranded wire and splicing fitting sleeve |
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