CN107688001A - The System and method for of mandrel stripping off device and mandrel stripping type measure prepreg viscosity - Google Patents
The System and method for of mandrel stripping off device and mandrel stripping type measure prepreg viscosity Download PDFInfo
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- CN107688001A CN107688001A CN201710573936.7A CN201710573936A CN107688001A CN 107688001 A CN107688001 A CN 107688001A CN 201710573936 A CN201710573936 A CN 201710573936A CN 107688001 A CN107688001 A CN 107688001A
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- G—PHYSICS
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- 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
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Abstract
The invention discloses a kind of mandrel stripping off device and the System and method for of mandrel stripping type measure prepreg viscosity, belong to material physical properties technical field of measurement and test.Mandrel stripping off device includes base, draw-off mechanism, the sample board for pasting prepreg test sample and peels off mandrel；Peel off mandrel to be installed in rotation on base, sample board is slidably mounted on base by guide rail slide block mechanism；Draw-off mechanism includes the first pulley being installed in rotation on base and across the pull rope being wound in first pulley, first pulley is located at a side of line slideway, one end of pull rope is fixedly connected with one end of sample board, and the other end is used to pull sample board slip in stripping process and sliding speed is equal to the peeling rate of prepreg test sample.For the stripping off device by the cooperation with universal testing machine, what can be quantified determines the physical quantity for characterizing prepreg viscosity and bending stiffness.
Description
Technical field
The present invention relates to material physical properties determination techniques field, specifically, is related to one kind and is glued for determining prepreg
Property and rigidity mandrel stripping off device, with the mandrel stripping off device structure prepreg viscosity measurement system and with the measurement system
The method tested prepreg viscosity.
Background technology
Prepreg viscosity refers to that under shorter time of contact and contact prepreg is formed with other object surfaces
A kind of incomplete bonding characteristic, its key factor as decision prepreg if appropriate for paving.In composite material laying work
In skill, it is desirable to which prepreg is in a rational sticky scope, when viscosity is insufficient, easily produces sliding, builds bridge etc. and lay defect；
And when sticky excessive, then it is unfavorable for adjusting when laying is wrong spreading again, be also unfavorable for prepreg peels off with backing paper, and can give and presoak
The conveyer belt of material comes difficult.
Therefore, it is before improving composite material spreading to determine exactly for the physical quantity for characterizing prepreg viscosity
One of carry, but due to lacking accurate and effective and quantitative assay method, cause people when describing the viscosity of prepreg, usually
High, medium and low third gear is rule of thumb divided into, or observational measurement is carried out using certain methods, such as：(1) rolling ball method：Rule
It is sized on 45 ° of slopes for being placed on the plastic beads of quality and posting prepreg, allows bead to scroll down through, is ground by rolling situation
Study carefully the viscosity of prepreg；(2) method of Tearing：Two panels prepreg is fit together, and applies pressure, is then torn, it is negative to provide
Two panels prepreg is completely torn apart the time of separation as its sticky index of sign 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 determining prepreg
Bending stiffness.
The content of the invention
It is an object of the invention to provide a kind of mandrel stripping off device for being used to quantitative determine prepreg viscosity；
The mandrel stripping type that mandrel stripping off device structure is stated it is a further object of the present invention to provide more than one determines preimpregnation
Expect the system of viscosity；
Another object of the present invention is to provide a kind of method being measured using said system to prepreg viscosity.
To achieve these goals, mandrel stripping off device provided by the invention includes base, draw-off mechanism, pre- for pasting
The sample board of sample and the stripping mandrel for forcing prepreg test sample to be close to sample board in stripping transitional region are expected in leaching；Peel off core
Axle is installed in rotation on base, and sample board is slidably mounted on base by guide rail slide block mechanism, guide rail slide block machine
Structure includes the line slideway arranged along the length direction of sample board；Draw-off mechanism includes first be installed in rotation on base
Pulley and it is located at a side of line slideway, one end of pull rope and examination across the pull rope being wound in first pulley, first pulley
One end of model is fixedly connected, and the other end is used to pull sample board slip in stripping process and sliding speed is tried equal to prepreg
The peeling rate of sample.
In continuous mode, the stripping off device is arranged on universal testing machine, and the other end of pull rope is fixed on
On the chuck of universal testing machine, and the peel tip of prepreg test sample is also secured on the chuck；During peel test, lead to
Cross chuck and pull sample board and prepreg test sample peel tip constant speed movement.So as to be recorded by universal testing machine for subsequently locating
Reason characterizes the physical quantity of prepreg viscosity to obtain.
Specific scheme is that sample board includes the 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.It is easy to paste prepreg test sample in test process.
Another specific scheme is that second pulley is rotatably mounted with base, and second pulley is adjacent positioned at mandrel is peeled off
The side of nearly first pulley；Pull rope is across being wound in second pulley, and the direct of travel along pull rope in stripping process, and second
Pulley is located at the downstream of first pulley.
Another specific scheme is attached with one layer of Teflon to peel off on the side face of mandrel.Efficiently reduce stripping process
Frictional force between middle prepreg test sample and stripping mandrel, effectively ensure that the accuracy of test result.
Preferable scheme is the traction ran between first pulley and sample board parallel to line slideway.
Another preferable scheme is that base is U-type groove structure, its cell wall be provided with the axis hole that is used for installing pulley spindle and
The axis hole of mandrel rotating shaft is peeled off for installing；Line slideway is placed in arranging in U-type groove and along flute length direction with sample board.
In order to realize above-mentioned another object, the present invention provides the system of mandrel stripping type measure prepreg viscosity including omnipotent
Testing machine and the stripping off device being mounted on universal testing machine, stripping off device are the mandrel stripping described by any of the above-described technical scheme
From device；Base is fixed on the bearing of universal testing machine, and line slideway is arranged in the horizontal direction, the peel tip of prepreg test sample
It is clamped on the chuck of universal testing machine, the other end of pull rope is fixed on chuck；The prepreg test sample section peeled off along hang down
To arrangement；Along direct of travel of the pull rope in stripping process, traction ran is vertically arranged between chuck and adjacent pulleys.
In order to realize above-mentioned a further object, the method for mandrel stripping type measure prepreg viscosity provided by the invention is utilization
Said system is measured, and it includes：
Material preparation step, N bar prepreg test-strips are arranged side by side, first is chosen in test zone along its length and is surveyed
Region and the second test zone are tried, retains N in the first test zone1The backing film of bar prepreg, in the second test zone
Retain N2The backing film of bar prepreg, prepreg test sample is obtained, 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 is sticked on sample board；
Initialization step, under conditions of chuck does not clamp prepreg test sample, start universal testing machine and pull sample board to enter
Row is empty to run experiment, obtains displacement-force curve S1；
Strip step, the bare terminal end of prepreg test sample is clipped on chuck, start universal testing machine by prepreg test sample from
Peeled off on sample board, obtain displacement-force curve S2；
Pre-treatment step, on the basis of displacement, curve S2 and curve S1 are subtracted each other, obtain 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；
Calculation procedure, according to formulaThe physical quantity of computational representation prepreg viscosity, B survey for prepreg
The width of strip.
Specific scheme is in calculation procedure, 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.It is easy to follow-up calculating and the preparation of prepreg test sample.
Brief description of the drawings
Fig. 1 is to be provided with the mandrel stripping off device of prepreg test sample and the schematic perspective view of chuck in the embodiment of the present invention；
Fig. 2 is to be provided with the mandrel stripping off device of prepreg test sample and the schematic front view of chuck in the embodiment of the present invention；
Fig. 3 is the workflow diagram of the method that mandrel stripping type determines 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.
Embodiment
With reference to embodiments and its accompanying drawing the present invention is further illustrated.
Embodiment
Referring to Fig. 1 and Fig. 2, the system of mandrel stripping type measure prepreg viscosity of the present invention includes universal testing machine (in figure
Its chuck 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 base 10, draw-off mechanism, the sample board 2 for pasting prepreg test sample 6 and peels off core
Axle 11.Base 10 is a U-type groove structure, and the central region of its cell wall in the longitudinal direction is provided with axis hole, peels off mandrel 11 and passes through
The cooperation of rotating shaft 12 and the axis hole and be installed in rotation on base 10.In the present embodiment, mandrel 11 is peeled off in order to reduce
With the frictional force between prepreg test sample 6, one layer of Teflon of surface spraying of mandrel 11 is being peeled off.
Sample board 2 includes being used to paste the portable plate 22 of prepreg test sample 6 and is 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 base 10.
Draw-off mechanism includes pull rope 41, first pulley 42 and second pulley 44；Set on the cell wall of U-type groove structure one end
There is the axis hole for installing rotating shaft 43, and peel off mandrel 11 and the axis hole for being used for installing rotating shaft 45 is provided with adjacent to the side of rotating shaft 43,
First pulley 42 is installed in rotation in rotating shaft 43, and second pulley 44 is installed in rotation in rotating shaft 45, i.e. first pulley
42 are located at a side of line slideway 31, and second pulley 44 is located at stripping 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
In second pulley 43, and finally clamped by chuck 5, i.e. the direct of travel along pull rope 41 in stripping process, second pulley 44
Positioned at the downstream of first pulley 42.
In use, base is fixed on the bearing of universal testing machine, and makes line slideway 31 in the horizontal direction
Arrangement, and the peel tip of prepreg test sample 6 is clamped on the chuck 5 of universal testing machine；In stripping process, for prepreg
Sample 6, its prepreg test sample section 603 peeled off vertically arrange, i.e. the prepreg test sample section with being pasted onto 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 peeling off mandrel 11
Pressure under be close to sample board 2, so as to realize peel angle be 90 degree.
Along direct of travel of the pull rope 41 in stripping process, the pull rope between sample board 2 and first pulley 42
Section 411 arranges in the horizontal direction, the cloth in the horizontal direction of the traction ran 412 between first pulley 42 and second pulley 44
Put, and the traction ran 413 between the second pulley 44 adjacent thereto of chuck 5 is vertically arranged, that is, draw ran 413 with it is pre-
Leaching material sample section 603 is parallel, and so as in stripping process, pull rope is used to pulling sample board 2 to slide and its sliding speed etc.
In the peeling rate of prepreg test sample 6.
Referring to Fig. 3, the viscosity of prepreg is included with the method that bending stiffness is measured using said determination system standby
Expect step S1, gluing steps S2, initialization step S3, strip step S4, pre-treatment step S5 and calculation procedure S6.
Material preparation step S1, N bar prepreg test-strips are arranged side by side, choose first in test zone along its length
Test zone and the second test zone, retain N in the first test zone1The backing film of bar prepreg, in the second test zone
Interior reservation N2The backing film of bar prepreg, prepreg test sample is obtained, 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.
As Fig. 2, Fig. 4 and Fig. 5 show, test-strips leading section 404 is used to be clamped in chuck 5 in stripping process, and its 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 the length of test zone 607.
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 on the 60 symmetrical cloth of line of symmetry on the width of prepreg test sample 6
Put, i.e. N2=0, N1=4.
Gluing steps S2, apply the predetermined pressure of scheduled duration to prepreg test sample 6, its back side is 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
There is no adherence force between model 2, therefore its peeling force does not include the partial cohesive factor in test process.
Initialization step S3, under conditions of chuck 5 does not clamp prepreg test sample 6, start universal testing machine and pull sample
Plate 2 carries out empty run and tested, and obtains displacement-force curve S1.
Strip step S4, the bare terminal end of prepreg test sample 6 is clipped on chuck 5, starts universal testing machine and try prepreg
Sample 6 is peeled off from sample board 2, obtains displacement-force curve S2.
The portable plate 22 for being pasted with prepreg test sample 6 is attached on supporting plate 21, and pressed from both sides using the chuck 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, on the basis of displacement, curve S2 and curve S1 are subtracted each other, obtain 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 in partial trace corresponding to the displacement of 401 and second test zone of region 402 is tried, that is, obtains peeling force P1With stripping
From power P2。
Calculation procedure, 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 be obtainedOr
In the present embodiment, due to N2=0, N1=4, it can obtainOr
With the physical quantity F calculated1As sign prepreg viscosity, physical quantity F2As characterize prepreg bending stiffness,
Compared with qualitative description of the prior art, it has advantages below：
(1) measuring method for the mandrel stripping off device based on measure prepreg viscosity and rigidity that the present invention designs, is used
Universal testing machine is measured to the power in the prepreg stripping process for preparing, and what can directly be quantified tries to achieve the rigidity of prepreg,
Analyzed and calculated on this basis, realized sign and measure to the rigidity of prepreg, compensate at present to prepreg
Stiffness measuring device and method missing；And analyzed on this basis and mathematic interpolation, realize indirectly for pre-
The measure of the sticky quantification of material is soaked, method simplicity is easily achieved, is easy to control；
(2) measuring method for the mandrel stripping off device based on measure prepreg viscosity and rigidity that the present invention designs, its institute
Prepreg test sample is needed to prepare simple, it is easy to accomplish, efficiency is higher.
Embodiments of the present invention are explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned implementation
Mode, can also be on the premise of present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Make a variety of changes.
Claims (10)
1. a kind of mandrel stripping off device for being used to determine prepreg viscosity, it is characterised in that the mandrel stripping off device includes bottom
Seat, draw-off mechanism, the sample board for pasting prepreg test sample and for peel off transitional region force prepreg test sample to be close to
The stripping mandrel of sample board；
The stripping mandrel is installed in rotation on the base, and the sample board is slideably pacified by guide rail slide block mechanism
On the base, the guide rail slide block mechanism includes the line slideway arranged along the length direction of the sample board；
The draw-off mechanism includes the first pulley that is installed in rotation on the base and across being wound in the first pulley
Pull rope, the first pulley is located at a side of the line slideway, one end of the pull rope and the sample board
One end is fixedly connected, and the other end is used to pull the sample board slip in stripping process and sliding speed is equal to prepreg test sample
Peeling rate.
2. mandrel stripping off device according to claim 1, it is characterised in that：
The sample board includes being used to paste the portable plate of prepreg test sample and is fixed on the sliding block of the guide rail slide block mechanism
Supporting plate, the portable plate is removably mounted on the supporting plate.
3. mandrel stripping off device according to claim 1, it is characterised in that：
Second pulley is rotatably mounted with the base, the second pulley is positioned at the stripping mandrel adjacent to described first
The side of pulley；
The pull rope is across being wound in the second pulley, and the direct of travel along pull rope in stripping process, and described second
Pulley is located at the downstream of the first pulley.
4. mandrel stripping off device according to claim 1, it is characterised in that：
One layer of Teflon is attached with the side face for peeling off mandrel.
5. the mandrel stripping off device according to any one of Claims 1-4 claim, it is characterised in that：
Traction ran between the first pulley and the sample board is parallel to the line slideway.
6. the mandrel stripping off device according to any one of Claims 1-4 claim, it is characterised in that：
The base is U-type groove structure, and its cell wall, which is provided with, to be used to install the axis hole of pulley spindle and for installing the stripping core
The axis hole of the rotating shaft of axle；
The line slideway is placed in arranging in U-type groove and along flute length direction with the sample board.
7. a kind of system of mandrel stripping type measure 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 the mandrel stripping off device described in any one of claim 1 to 6 claim；
The base is fixed on the bearing of the universal testing machine, and the line slideway is arranged in the horizontal direction, the preimpregnation
The peel tip of material sample is clamped on the chuck of the universal testing machine, and the other end of the pull rope is fixed on the chuck
On；
The prepreg test sample section peeled off vertically is arranged；
Along direct of travel of the pull rope in stripping process, traction ran between the chuck and adjacent pulleys vertically cloth
Put.
8. a kind of method of mandrel stripping type measure prepreg viscosity, is measured using the system described in claim 7, wrapped
Include：
Material preparation step, N bar prepreg test-strips are arranged side by side, choose the first test section in test zone along its length
Domain and the second test zone, retain N in the first test zone1The backing film of bar prepreg, retain N in the second test zone2
The backing film of bar prepreg, prepreg test sample is obtained, 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 is sticked on sample board；
Initialization step, under conditions of chuck does not clamp prepreg test sample, start universal testing machine and pull sample board to carry out sky
Experiment is run, obtains displacement-force curve S1；
Strip step, the bare terminal end of prepreg test sample is clipped on chuck, starts universal testing machine by prepreg test sample from sample
Peeled off on plate, obtain displacement-force curve S2；
Pre-treatment step, on the basis of displacement, curve S2 and curve S1 are subtracted each other, obtain curve S3, and obtained from curve S3
Peeling force P in first test zone1With the peeling force P in the second test zone2；
Calculation procedure, according to formulaThe physical quantity of computational representation prepreg viscosity, B are prepreg test-strips
Width.
9. according to the method for claim 8, it is characterised in that：
In the calculation procedure, according to formulaOrComputational representation presoaks
Expect the physical quantity of bending stiffness.
10. according to the method for claim 8, it is characterised in that：N2=0, N1=N.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN107688001B (en) | 2019-11-19 |
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