CN107688001B - The System and method for of mandrel stripping off device and mandrel stripping type measurement prepreg viscosity - Google Patents
The System and method for of mandrel stripping off device and mandrel stripping type measurement prepreg viscosity Download PDFInfo
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- CN107688001B CN107688001B CN201710573936.7A CN201710573936A CN107688001B CN 107688001 B CN107688001 B CN 107688001B CN 201710573936 A CN201710573936 A CN 201710573936A CN 107688001 B CN107688001 B CN 107688001B
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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
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
Abstract
The invention discloses a kind of mandrel stripping off device and the System and method fors of mandrel stripping type measurement prepreg viscosity, belong to material physical properties the field of test technology.Mandrel stripping off device includes pedestal, draw-off mechanism, the sample board for pasting prepreg test sample and removing mandrel；Removing mandrel is installed in rotation on pedestal, and sample board is slidably mounted on pedestal by guide rail slide block mechanism；Draw-off mechanism includes the first pulley being installed in rotation on pedestal and across the traction rope being wound in first pulley, first pulley is located at the one end of linear guide, one end of traction rope is fixedly connected with one end of sample board, and the other end is for pulling sample board to slide in stripping process and sliding speed is equal to the peeling rate of prepreg test sample.The stripping off device can quantitatively determine the physical quantity of characterization prepreg viscosity and bending stiffness by the cooperation with universal testing machine.
Description
Technical field
The present invention relates to material physical properties determination techniques fields, specifically, being related to a kind of viscous for measuring prepreg
Property and the mandrel stripping off device of rigidity, the prepreg viscosity measurement system and with the measurement system with mandrel stripping off device building
The method that prepreg viscosity is tested.
Background technique
Prepreg viscosity refers to that under shorter time of contact and contact pressure, prepreg is formed with other object surfaces
A kind of incomplete bonding characteristic, as decision prepreg if appropriate for the key factor of paving.In composite material laying work
In skill, it is desirable that prepreg is easy to produce the layings defect such as sliding, bridge formation when sticky insufficient in a reasonable sticky range；
And when sticky excessive, then it is unfavorable for adjusting when laying is wrong spreading again, is also unfavorable for prepreg and backing paper is removed, and can gives and presoak
The conveyer belt of material comes difficult.
Therefore, accurately determining the physical quantity for characterizing prepreg viscosity is before improving composite material spreading
One of mention, but due to lacking accurate and effective and quantitative measuring method, cause people when describing the viscosity of prepreg, usually
It is rule of thumb divided into high, medium and low third gear, or carries out observational measurement using certain methods, such as: (1) rolling ball method: rule
Scale cun and the plastic beads of quality are placed on 45 ° of slopes for posting prepreg, and bead is allowed to scroll down through, and are ground by rolling situation
Study carefully the viscosity of prepreg；(2) method of Tearing: fitting together two panels prepreg, and apply pressure, then tear, negative to provide
Two panels prepreg is completely torn apart the time of separation as the index for characterizing its viscosity under lotus；(3) partition method etc. is pasted.
Further, since prepreg self character is limited, the device of traditional measurement rigidity is caused to be unsuitable for measuring prepreg
Bending stiffness.
Summary of the invention
The object of the present invention is to provide a kind of for quantitative determining the mandrel stripping off device of prepreg viscosity；
It is a further object of the present invention to provide the mandrel stripping type measurement preimpregnation that more than one state the building of mandrel stripping off device
Expect the system of viscosity；
Another object of the present invention is to provide a kind of method being measured using above system to prepreg viscosity.
To achieve the goals above, mandrel stripping off device provided by the invention include pedestal, it is draw-off mechanism, pre- for pasting
The sample board of sample and the removing mandrel for forcing prepreg test sample to be close to sample board in removing transitional region are expected in leaching；Remove core
Axis is installed in rotation on pedestal, and sample board is slidably mounted on pedestal by guide rail slide block mechanism, guide rail slide block machine
Structure includes the linear guide arranged along the length direction of sample board；Draw-off mechanism includes first be installed in rotation on pedestal
Pulley and across the traction rope being wound in first pulley, first pulley is located at the one end of linear guide, one end of traction rope and examination
One end of template is fixedly connected, and the other end is used to pull sample board sliding in stripping process and sliding speed is tried equal to prepreg
The peeling rate of sample.
In continuous mode, which is mounted on universal testing machine, and the other end of traction rope is fixed on
On the collet of universal testing machine, and the peel tip of prepreg test sample is also secured on the collet；During peel test, lead to
It crosses collet and pulls sample board and prepreg test sample peel tip constant speed movement.So as to be used for subsequent place by universal testing machine record
Reason characterizes the physical quantity of prepreg viscosity to obtain.
Specific scheme is that sample board includes portable plate for pasting prepreg test sample and is fixed on guide rail slide block mechanism
Sliding block on supporting plate, portable plate is removably mounted on supporting plate.Convenient for pasting prepreg test sample in test process.
Another specific scheme is that second pulley is rotatably mounted on pedestal, and it is adjacent that second pulley is located at removing mandrel
The side of nearly first pulley；Traction rope is across being wound in second pulley, and the direction of travel along traction rope in stripping process, and second
Pulley is located at the downstream of first pulley.
Another specific scheme is to be attached with one layer of Teflon on the circumferential surface for remove mandrel.Efficiently reduce stripping process
Frictional force between middle prepreg test sample and removing mandrel, effectively ensures that the accuracy of test result.
Preferred scheme is that the traction rope section between first pulley and sample board is parallel to linear guide.
It is U-type groove structure that another preferred scheme, which is pedestal, cell wall be equipped with axis hole for installing pulley spindle and
For installing the axis hole of removing mandrel shaft；Linear guide and sample board are placed in U-type groove and arrange along flute length direction.
In order to achieve the above-mentioned another object, the system that the present invention provides mandrel stripping type measurement prepreg viscosity includes omnipotent
Testing machine and the stripping off device being mounted on universal testing machine, stripping off device are the stripping of mandrel described in any of the above-described technical solution
From device；Pedestal is fixed on the support of universal testing machine, and linear guide is arranged in the horizontal direction, the peel tip of prepreg test sample
It is clamped on the collet of universal testing machine, the other end of traction rope is fixed on collet；The prepreg test sample section removed is along vertical
To arrangement；Along direction of travel of the traction rope in stripping process, rope section is drawn between collet and adjacent pulleys and is vertically arranged.
In order to achieve the above-mentioned further object, the method for mandrel stripping type measurement prepreg viscosity provided by the invention is to utilize
Above system is measured comprising:
N prepreg test-strips are arranged side by side by material preparation step, choose first in test zone along its length and survey
Region and the second test zone are tried, retains N in the first test zone1The backing film of prepreg, in the second test zone
Retain N2The backing film of prepreg obtains prepreg test sample, wherein N >=2, N1≠N2、0≤N1≤ N and 0≤N2≤N；
Gluing steps apply the predetermined pressure of scheduled duration to prepreg test sample, its back side are made to be sticked on sample board；
Initialization step, under conditions of collet does not clamp prepreg test sample, starting universal testing machine pull sample board into
Row is empty to run experiment, obtains displacement-force curve S1；
The clamping end of prepreg test sample is clipped on collet by strip step, starting universal testing machine by prepreg test sample from
It is removed on sample board, obtains displacement-force curve S2；
Pre-treatment step is subtracted each other curve S2 and curve S1 on the basis of displacement, obtains curve S3, and from curve S3
Obtain the peeling force P in the first test zone1With the peeling force P in the second test zone2；
Step is calculated, according to formulaThe physical quantity of computational representation prepreg viscosity, B are prepreg survey
The width of strip.
Specific scheme is in calculating step, according to formulaOr
The physical quantity of computational representation prepreg bending stiffness.So as to accurately determine the physics for characterizing prepreg bending stiffness
Amount.
Another specific scheme is N2=0, N1=N.Convenient for subsequent calculating and the preparation of prepreg test sample.
Detailed description of the invention
Fig. 1 is to be equipped with the mandrel stripping off device of prepreg test sample and the stereoscopic schematic diagram of collet in the embodiment of the present invention；
Fig. 2 is to be equipped with the mandrel stripping off device of prepreg test sample and the schematic front view of collet in the embodiment of the present invention；
Fig. 3 is the work flow diagram for the method that mandrel stripping type measures prepreg viscosity in the embodiment of the present invention；
Fig. 4 is the structure schematic diagram of prepreg test sample in the embodiment of the present invention；
Fig. 5 is the positive structure schematic of prepreg test sample in the embodiment of the present invention.
Specific embodiment
With reference to embodiments and its attached drawing the present invention is further illustrated.
Embodiment
Referring to Fig. 1 and Fig. 2, the system of mandrel stripping type measurement prepreg viscosity of the present invention includes universal testing machine (in figure
Its collet 5 is only shown) and it is mounted in mandrel stripping off device 1 on the universal testing machine.
Mandrel stripping off device 1 includes pedestal 10, draw-off mechanism, the sample board 2 for pasting prepreg test sample 6 and removing core
Axis 11.Pedestal 10 is a U-type groove structure, and the central region of cell wall in the longitudinal direction is equipped with axis hole, and removing mandrel 11 passes through
The cooperation of shaft 12 and the axis hole and be installed in rotation on pedestal 10.In the present embodiment, mandrel 11 is removed in order to reduce
With the frictional force between prepreg test sample 6, one layer of Teflon is sprayed on the surface of removing mandrel 11.
Sample board 2 includes for pasting the portable plate 22 of prepreg test sample 6 and being fixed on the sliding block 32 of guide rail slide block mechanism 3
On supporting plate 21, portable plate 22 is removably mounted on supporting plate 21；Two straight lines being parallel to each other in guide rail slide block mechanism 3
Guide rail 31 is placed in U-type groove, and the length direction of itself and sample board 2 is arranged along the flute length direction of U-type groove；That is, sample board 2 is logical
Guide rail slide block mechanism 3 is crossed to be slidably mounted on pedestal 10.
Draw-off mechanism includes traction rope 41, first pulley 42 and second pulley 44；It is set on the cell wall of U-type groove structure one end
There is the axis hole for installing shaft 43, and removing mandrel 11 is equipped with the axis hole for installing shaft 45 adjacent to the side of shaft 43,
First pulley 42 is installed in rotation in shaft 43, and second pulley 44 is installed in rotation in shaft 45, i.e. first pulley
42 are located at the one end of linear guide 31, and second pulley 44 is located at removing mandrel 11 adjacent to the side of first pulley 42.Traction
Rope 41 one end be fixedly connected with sample board 2 adjacent to one end of first pulley 42, the other end successively across be wound on first pulley 42 and
It in second pulley 43, and is finally clamped by collet 5, i.e. the direction of travel along traction rope 41 in stripping process, second pulley 44
Positioned at the downstream of first pulley 42.
In use, pedestal is fixed on the support of universal testing machine, and makes linear guide 31 in the horizontal direction
Arrangement, and the peel tip of prepreg test sample 6 is clamped on the collet 5 of universal testing machine；In stripping process, for prepreg
Sample 6, the prepreg test sample section 603 removed vertically arrange, i.e., with the prepreg test sample section that is pasted on sample board 2
601 is mutually orthogonal, and the transitional region 602 between prepreg test sample section 603 and prepreg test sample section 601 is in removing mandrel 11
Pressure under be close to sample board 2, thus realize peel angle be 90 degree.
Traction rope along direction of travel of the traction rope 41 in stripping process, between sample board 2 and first pulley 42
Section 411 arranges in the horizontal direction, the cloth in the horizontal direction of the traction rope section 412 between first pulley 42 and second pulley 44
It sets, and the traction rope section 413 being located between the second pulley 44 adjacent thereto of collet 5 is vertically arranged, i.e. traction rope section 413 and pre-
Leaching material sample section 603 is parallel, so that traction rope is for pulling the sliding of sample board 2 and its sliding speed etc. in stripping process
In the peeling rate of prepreg test sample 6.
It the use of said determination system include standby with the method that bending stiffness is measured to the viscosity of prepreg referring to Fig. 3
Expect step S1, gluing steps S2, initialization step S3, strip step S4, pre-treatment step S5 and calculates step S6.
N prepreg test-strips are arranged side by side, choose first in test zone along its length by material preparation step S1
Test zone and the second test zone, retain N in the first test zone1The backing film of prepreg, in the second test zone
Interior reservation N2The backing film of prepreg obtains prepreg test sample, wherein N >=2, N1≠N2、0≤N1≤ N and 0≤N2≤N。
In the present embodiment, the process for preparing prepreg test sample 6 is, as shown in Figures 4 and 5, by 4 carbon fiber prepregs
Test-strips 61,62,63 and 64 are arranged side by side, and the length of four battens is 2L+M, and width is B.
If Fig. 2, Fig. 4 and Fig. 5 show, test-strips front end 404 is used to be clamped in collet 5 in stripping process, the length is
M, and test zone 607 is divided into the first test zone 605 and the second test zone 606, the length of two test zones
It is L, the as half of 607 length of test zone.
Retain backing film 65,66,67 and 68 of 4 test-strips in the first test zone 605, tear other backing films,
In the present embodiment, the backing film 65-68 remained is about the symmetrical cloth of line of symmetry 60 in the width direction of prepreg test sample 6
It sets, i.e. N2=0, N1=4.
Gluing steps S2 applies the predetermined pressure of scheduled duration to prepreg test sample 6, its back side is made to be sticked in sample board 2
On.
Portable plate 22 is dismantled from supporting plate 21, and the back side of prepreg test sample 6 is directed at portable plate 22 back to supporting plate 21
Surface, to prepreg test sample 6 apply pressure so that it is affixed on portable plate 22, and remain with part and the examination of backing film
Without adherence force between template 2, therefore the partial cohesive factor is not included in its peeling force of test process.
Initialization step S3, under conditions of collet 5 does not clamp prepreg test sample 6, starting universal testing machine pulls sample
Plate 2 carries out empty run and tests, and obtains displacement-force curve S1.
The clamping end of prepreg test sample 6 is clipped on collet 5 by strip step S4, and starting universal testing machine tries prepreg
Sample 6 is removed from sample board 2, obtains displacement-force curve S2.
It will be pasted in the installation to supporting plate 21 of portable plate 22 of prepreg test sample 6, and pressed from both sides using the collet 5 of universal testing machine
The firmly end 604 of prepreg test sample 6.
Start universal testing machine, prepreg test sample 6 is stripped down from sample board 2, and record the position in stripping process
Shifting-force curve S2.
Pre-treatment step S5 is subtracted each other curve S2 and curve S1 on the basis of displacement, acquisition curve S3, and from curve S3
The middle peeling force P obtained in the first test zone1With the peeling force P in the second test zone2.First is chosen in curve S to survey
The stable force that examination region 401 and the second test zone 402 are displaced in corresponding partial trace, i.e. acquisition peeling force P1With stripping
From power P2。
Step is calculated, according to formulaThe physical quantity of computational representation prepreg viscosity, and according to formulaOrThe physical quantity of computational representation prepreg bending stiffness, B are prepreg
The width of test-strips.
With physical quantity F1、F2The viscosity and bending stiffness of prepreg are characterized respectively；Then for peeling force P1, there is formula 1:NBF2+
(N-N1)BF1=P1；And to peeling force P2, there is formula 2:NBF2+(N-N2)BF1=P2。
Association type 1 and formula 2, can obtainOr
In the present embodiment, due to N2=0, N1=4, it can obtainOr
With calculated physical quantity F1As characterization prepreg viscosity, physical quantity F2As characterization prepreg bending stiffness,
Compared with qualitative description in the prior art, have the advantage that
(1) measurement method for the mandrel stripping off device based on measurement prepreg viscosity and rigidity that the present invention designs, uses
Universal testing machine is measured to the power in the prepreg stripping process prepared, and what can directly be quantified acquires the rigidity of prepreg,
It is analyzed and is calculated on this basis, realized the characterization and measurement to the rigidity of prepreg, compensate at present to prepreg
Stiffness measuring device and method missing；And carry out analysis on this basis and calculated with difference, it is realized indirectly for pre-
The measurement of the sticky quantification of material is soaked, method simplicity is easily achieved, convenient for control；
(2) measurement method for the mandrel stripping off device based on measurement prepreg viscosity and rigidity that the present invention designs, institute
Need prepreg test sample preparation simple, it is easy to accomplish, efficiency is higher.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
It makes a variety of changes.
Claims (8)
1. a kind of for measuring the mandrel stripping off device of prepreg viscosity, which is characterized in that the mandrel stripping off device includes bottom
Seat, draw-off mechanism, the sample board for pasting prepreg test sample and for removing transitional region force prepreg test sample to be close to
The removing mandrel of sample board；
The removing mandrel is installed in rotation on the pedestal, and the sample board is slideably pacified by guide rail slide block mechanism
On the base, the guide rail slide block mechanism includes the linear guide arranged along the length direction of the sample board to dress；
The draw-off mechanism includes the first pulley being installed in rotation on the pedestal and across being wound in the first pulley
Traction rope, the first pulley is located at the one end of the linear guide, one end of the traction rope and the sample board
One end is fixedly connected, and for pulling in stripping process, the sample board slides the other end and sliding speed is equal to prepreg test sample
Peeling rate；
The sample board includes portable plate for pasting prepreg test sample and the sliding block for being fixed on the guide rail slide block mechanism
Supporting plate, the portable plate is removably mounted on the supporting plate；
Second pulley is rotatably mounted on the pedestal, the second pulley is located at the removing mandrel adjacent to described first
The side of pulley, and it is located at the first pulley adjacent to the side of the removing mandrel；The traction rope is across being wound on described second
On pulley, and the direction of travel along traction rope in stripping process, the second pulley are located at the downstream of the first pulley.
2. mandrel stripping off device according to claim 1, it is characterised in that:
One layer of Teflon is attached on the circumferential surface of the removing mandrel.
3. mandrel stripping off device according to claim 1 or 2, it is characterised in that:
Traction rope section between the first pulley and the sample board is parallel to the linear guide.
4. mandrel stripping off device according to claim 1 or 2, it is characterised in that:
The pedestal is U-type groove structure, and cell wall is equipped with for installing the axis hole of pulley spindle and for installing the removing core
The axis hole of the shaft of axis；
The linear guide and the sample board are placed in U-type groove and arrange along flute length direction.
5. a kind of system of mandrel stripping type measurement prepreg viscosity, including universal testing machine and it is mounted in the universal testing machine
On stripping off device, it is characterised in that:
The stripping off device is mandrel stripping off device described in any one of Claims 1-4 claim；
The pedestal is fixed on the support of the universal testing machine, and the linear guide is arranged in the horizontal direction, the preimpregnation
The peel tip of material sample is clamped on the collet of the universal testing machine, and the other end of the traction rope is fixed on the collet
On；
The prepreg test sample section removed vertically is arranged；
Along direction of travel of the traction rope in stripping process, traction rope section between the collet and adjacent pulleys vertically cloth
It sets.
6. a kind of method of mandrel stripping type measurement prepreg viscosity, is measured using the system described in claim 5, is wrapped
It includes:
N prepreg test-strips are arranged side by side, choose the first test section in test zone along its length by material preparation step
Domain and the second test zone, retain N in the first test zone1The backing film of prepreg, retains N in the second test zone2
The backing film of prepreg obtains prepreg test sample, wherein N >=2, N1≠N2、0≤N1≤ N and 0≤N2≤N；
Gluing steps apply the predetermined pressure of scheduled duration to prepreg test sample, its back side are made to be sticked on sample board；
Initialization step, under conditions of collet does not clamp prepreg test sample, it is empty that starting universal testing machine pulls sample board to carry out
Experiment is run, displacement-force curve S1 is obtained；
The clamping end of prepreg test sample is clipped on collet by strip step, and starting universal testing machine is by prepreg test sample from sample
It is removed on plate, obtains displacement-force curve S2；
Pre-treatment step is subtracted each other curve S2 and curve S1 on the basis of displacement, obtains curve S3, and obtain from curve S3
Peeling force P in first test zone1With the peeling force P in the second test zone2；
Step is calculated, according to formulaThe physical quantity of computational representation prepreg viscosity, B are prepreg test-strips
Width.
7. according to the method described in claim 6, it is characterized by:
In the calculating step, according to formulaOrComputational representation preimpregnation
Expect the physical quantity of bending stiffness.
8. according to the method described in claim 6, it is characterized by: N2=0, N1=N.
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| CN201710573936.7A CN107688001B (en) | 2017-07-11 | 2017-07-11 | The System and method for of mandrel stripping off device and mandrel stripping type measurement prepreg viscosity |
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| CN108645787A (en) * | 2018-05-16 | 2018-10-12 | 常州市新创智能科技有限公司 | Honeycomb core plate electronic stripping tester and its application method |
| CN111398094B (en) * | 2020-03-09 | 2022-02-01 | 合肥工业大学 | Viscosity testing method and system for dry-method winding prepreg |
| CN116879162B (en) * | 2023-09-06 | 2023-12-12 | 江苏集萃碳纤维及复合材料应用技术研究院有限公司 | Composite material prepreg viscosity testing device and testing method |
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| CN104198372B (en) * | 2014-08-20 | 2016-07-06 | 太仓荣南密封件科技有限公司 | A kind of adhesive tape automatically-synchronously testing device |
| CN204422390U (en) * | 2015-01-08 | 2015-06-24 | 武汉华威专用汽车检测有限责任公司 | Right angle peel test device |
| CN104764691B (en) * | 2015-03-24 | 2017-06-06 | 南京航空航天大学 | The high velocity experiments device and experimental technique of adhesive property between test prepreg |
| CN105675489B (en) * | 2016-04-12 | 2019-05-07 | 南京航空航天大学 | The experimental provision and experimental method of adhesive property between a kind of test prepreg |
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