CN105675489B - An experimental device and experimental method for testing the interlayer bonding performance of prepreg - Google Patents
An experimental device and experimental method for testing the interlayer bonding performance of prepreg Download PDFInfo
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- CN105675489B CN105675489B CN201610225267.XA CN201610225267A CN105675489B CN 105675489 B CN105675489 B CN 105675489B CN 201610225267 A CN201610225267 A CN 201610225267A CN 105675489 B CN105675489 B CN 105675489B
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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
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Abstract
本申请提供一种测试预浸料层间粘结性能的实验装置和实验方法，其中，所述实验装置包括主体机构、导料机构以及剥离机构，所述主体机构包括底座、控制柜、速度控制部以及压力控制部，所述导料机构包括上导料板、下导料板以及安装支架，所述剥离机构包括拉伸试验机、位于所述拉伸试验机中间镂空区域的上夹头和下夹头。本申请实施方式提供的一种测试预浸料层间粘结性能的实验装置和实验方法，能够符合大型复合材料构件自动铺放工程实际，为自动铺放过程中工艺参数的选择提供了可靠依据。
The present application provides an experimental device and an experimental method for testing the interlayer bonding performance of prepregs, wherein the experimental device includes a main body, a material guiding mechanism and a peeling mechanism, and the main body includes a base, a control cabinet, a speed control part and a pressure control part, the material guide mechanism includes an upper material guide plate, a lower material guide plate and a mounting bracket, the peeling mechanism includes a tensile testing machine, an upper chuck located in the hollow area in the middle of the tensile testing machine, and Lower collet. An experimental device and an experimental method for testing the interlayer bonding properties of prepregs provided by the embodiments of the present application can conform to the actual engineering practice of automatic laying of large-scale composite components, and provide a reliable basis for the selection of process parameters in the automatic laying process. .
Description
Technical field
This application involves material technical field of automatic placement is met, in particular to adhesive property between a kind of test prepreg
Experimental provision and experimental method.
Background technique
Automatic placement technology is a kind of inexpensive Composites Molding Techniques, including automated tape-laying technology
(AutomatedTape Laying, ATL) and automatic fiber placement technology (Automatic Fiber Placement, AFP), will
Material, structure, which design and manufacture, to be linked together, highly integrated numerical control machine tool technique, material technology technology and CAD/CAM software
Technology such as realizes the automatic placement of prepreg, compacting, shears and resend at the working abilities, large-scale compound particularly suitable for production
Material structure part.In automatic placement technology, the selection of material system and placement process control are the important of current urgent need to resolve
Project.
Prepreg is used material during automatic placement, is made of continuous reinforcing fiber infusing matrix resin
Composition.During automatic placement, the adhesive property of prepreg is an important indicator, directly determines this kind of prepreg
If appropriate for being used for automatic placement, suitable adhesive property guarantee prepreg be not only easy paving on mold or upper laying surface but also
Easily remove the polyethylene film and backing paper on surface.Therefore, the adhesive property of prepreg is measured to work during automatic placement
The selection of skill parameter has directive significance.
Currently, being explored both at home and abroad to the test device and experimental method of prepreg adhesive property, but due to surveying
Examination process cannot simulate completely automatic placement process and be unable to the interlayer adhesion of prepreg during accurate characterization automatic placement
Energy.
It should be noted that the above description of the technical background be intended merely to it is convenient to the technical solution of the application carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes the application's
Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
The application embodiment be designed to provide it is a kind of test prepreg between adhesive property experimental provision and reality
Proved recipe method is allowed to meet large-scale composite material component automatic placement engineering reality, is the choosing of technological parameter during automatic placement
Offer reliable basis is provided.
To achieve the above object, the application on the one hand provide it is a kind of test prepreg between adhesive property experimental provision,
Described device includes main body mechanism, material guide mechanism and mechanism for stripping, wherein the main body mechanism includes pedestal, control cabinet, speed
Spend control unit and pressure control portion, wherein the speed controlling portion include stepper motor, stepper motor mounting plate, shaft coupling,
Active silicon rubber Kun and a pair of of hold-down support, the stepper motor are supported by the stepper motor mounting plate is fixed, the step
Motor shaft into motor is connected by the shaft coupling with the active silica gel roller, and the pair of hold-down support is located at
The both ends of the active silica gel roller, the both ends of the active silica gel roller are each passed through default logical on the hold-down support
Hole；The pressure control portion include a pair of of cylinder, a pair of of cylinder supports plate, a pair of of pressurization accessory plate, passive silica gel roller and
A pair of of pressure sensor, top of the passive silica gel roller parallel within the active silica gel roller, the passive silicon rubber
The both ends of rubber roller are aligned with the both ends of the active silica gel roller, and the cylinder, cylinder supports plate and pressure sensor are right
The both ends for claiming ground to be located at the passive silica gel roller, the cylinder supports plate and the pressure sensor are fixed by screws in
On the pedestal, the cylinder is located at the top of the cylinder supports plate and by the pressurization accessory plate and the passive silicon rubber
Rubber roller is connected, and to pressurize to the passive silica gel roller, the pressure sensor is located at the lower section of the hold-down support；It is described
Material guide mechanism includes upper stock guide, lower stock guide and mounting bracket, the height and tilt adjustable section of the upper stock guide,
For laying upper layer prepreg, the lower stock guide is used for laying lower layer prepreg in being horizontally arranged；The mechanism for stripping includes
Cupping machine, upper grip and lower collet positioned at cupping machine centre hollowed out area, the upper grip is for clamping
The unglued end of upper layer prepreg tape, the lower collet are used to clamp the unglued end of lower layer's prepreg tape, the upper grip and described
Lower collet can under the action of the cupping machine shift relative.
In one preferred embodiment of the application, the main body mechanism further includes temperature control part, the temperature control part packet
Include air-heater, heating tube, air-heater mounting plate and a pair of of heating tube mounting bracket, wherein the air-heater mounting plate is fixed
In on the cylinder supports plate, the air-heater is fixed on one end of the heating tube by the air-heater mounting plate, described
The air outlet of air-heater is connected with the heating tube, and the both ends of the heating tube are solid by the heating tube mounting bracket respectively
Due on the cylinder supports plate.
It further include thermocouple in the temperature control part, the thermocouple is fixed in one preferred embodiment of the application
In the heating tube, for measuring the temperature in the heating tube.
It include stepper motor driver, PLC, DC power supply, pressure in the control cabinet in one preferred embodiment of the application
Power amplifier, analog-digital converter, temp controlled meter and electromagnetic relay, wherein the DC power supply is stepper motor driving
Device, PLC, pressure amplifier, analog-digital converter, temp controlled meter and electromagnetic relay power supply, the pulse signal warp that the PLC is generated
After the stepper motor driver receives, the motor shaft of the stepper motor is driven to rotate by the stepper motor driver；Institute
It states after pressure amplifier amplifies the pressure simulation signal that the pressure sensor acquires and inputs the analog-digital converter, by institute
It states pressure simulation signal and is converted to pressure on the number signal；The temp controlled meter for controlling and show the temperature in the heating tube,
The electromagnetic relay is used for the on-off of control circuit.
It further include pressure regulator valve in the pressure control portion in one preferred embodiment of the application, the pressure regulator valve is for adjusting
Save the pressure in the cylinder.
To achieve the above object, the application on the other hand provide it is a kind of test prepreg between adhesive property experiment side
Method, which comprises prepreg is cut into 400 millimeters of length, wide 300 millimeters of upper layer prepreg tape and lower layer's prepreg tape simultaneously remove
The backing paper of every preimpregnation belt surface, sticking length in one end of every prepreg tape is 50 millimeters, the polyethylene that width is 300 millimeters
Film；Upper layer prepreg tape is not pasted into the face-up of the film, lower layer's prepreg tape is not pasted into the face-down of the film, point
It is not placed on stock guide and lower stock guide；When the cylinder in the pressure control portion of the experimental provision is in loosening state
When, the upper layer prepreg tape and lower layer's prepreg tape are bypassed into the heating tube, two sides relatively passes through the active silica gel roller
Between the passive silica gel roller；By the air pressure of cylinder described in the pressure regulation valve regulation, the active silica gel roller is compressed
Upper layer prepreg tape and lower layer's prepreg tape between the passive silica gel roller；Laying temperature, benefit are adjusted using the temp controlled meter
The revolving speed of the stepper motor is adjusted with the PLC；Start the experimental provision to the upper layer prepreg tape and lower layer's prepreg tape
Laying is carried out, and acquires pressure value and temperature value in lay-up process respectively using the pressure sensor and the thermocouple；
After the completion of laying, prepreg lamination after removing laying, the prepreg lamination is cut to it is 50 millimeters wide, long 400 millimeters
Sample；One end unglued in the upper layer prepreg tape and lower layer's prepreg tape of the sample is held on the upper grip under respectively
On collet；The upper grip and the lower collet are separated with pre-set velocity, the upper layer prepreg tape and lower layer's preimpregnation are brought into
Row removing, and recorded by the cupping machine be applied in drawing process power on the sample and the upper grip with
Relation curve between the displacement of the lower collet；According to the relation curve of record, Average peel force is calculated, and will be described
Average peel force is determined as the interlaminar bonding performance parameter of the sample.
In one preferred embodiment of the application, the unit of the Average peel force is N/50mm.
In one preferred embodiment of the application, in the interlayer adhesion that the Average peel force is determined as to the sample
After energy parameter, the method also includes: M lay-up process is carried out, and chooses portion from the prepreg after each laying
Sample carries out peel test, obtains corresponding M interlaminar bonding performance parameter；To obtained M interlaminar bonding performance ginseng
Number averageds, and the obtained average value is determined as to the interlaminar bonding performance parameter of prepreg, wherein M be greater than
Or the integer equal to 2.
By above the application embodiment provide technical solution as it can be seen that the beneficial effects of the present application are as follows:
1) structure is simple: automatic placement process is simulated by two pressure rollers in the present invention, by the speed of active silica gel roller
The pressure of control and passive silica gel roller controls depositing speeds and laying pressure during simulating automatic placement, obtains in structure
Great simplification；
2) measurability of pressure: it can accurately be measured in simulation laid course by pressure sensor and prepreg is applied
Pressure facilitates influence of the research laying pressure to prepreg adhesive property；
3) at low cost, easy to operate: apparatus of the present invention structure is simple, and input cost is low, tests strong operability, user
Just.
Referring to following description and accompanying drawings, specific implementations of the present application are disclosed in detail, specify the original of the application
Reason can be in a manner of adopted.It should be understood that presently filed embodiment is not so limited in range.In appended power
In the range of the spirit and terms that benefit requires, presently filed embodiment includes many changes, modifications and is equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the main body mechanism of experimental provision in the present invention；
Fig. 2 is the structural schematic diagram of the speed controlling portion of experimental provision in the present invention；
Fig. 3 is the structural schematic diagram of the pressure control portion of experimental provision in the present invention；
Fig. 4 is the structural schematic diagram of the material guide mechanism of experimental provision in the present invention；
Fig. 5 is the structural schematic diagram of the mechanism for stripping of experimental provision in the present invention；
Fig. 6 is the flow chart of experimental method in the present invention.
Figure label title: 1, pedestal, 2, heating tube, 3, air-heater, 4, cylinder supports plate, 5, air-heater mounting plate, 6,
Stepper motor mounting plate, 7, control cabinet, 8, stepper motor, 9, cylinder, 10, passive silica gel roller, 11, active silica gel roller, 12,
Heating tube mounting bracket, 13, pressure sensor, 14, hold-down support, 15, shaft coupling, 16, pressurization accessory plate, 17, mounting bracket,
18, upper stock guide, 19, lower stock guide, 20, cupping machine, 21, upper grip, 22, upper layer prepreg tape, 23, lower layer's prepreg tape,
24, lower collet.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in mode is applied, the technical solution in the application embodiment is clearly and completely described, it is clear that described
Embodiment is only a part of embodiment of the application, rather than whole embodiments.Based on the embodiment party in the application
Formula, all other embodiment obtained by those of ordinary skill in the art without making creative efforts, is all answered
When the range for belonging to the application protection.
The structure of the experimental provision of adhesive property is shown between a kind of test prepreg that Fig. 1 provides for embodiment of the present invention
It is intended to.Fig. 2 is the structural schematic diagram of the speed controlling portion of experimental provision in the present invention.Fig. 3 is the pressure of experimental provision in the present invention
The structural schematic diagram of force control unit.Fig. 4 is the structural schematic diagram of the material guide mechanism of experimental provision in the present invention.Fig. 5 is the present invention
The structural schematic diagram of the mechanism for stripping of middle experimental provision.Fig. 1 to Fig. 5 is please referred to, experimental provision of the present invention includes main body mechanism, leads
Expect mechanism and mechanism for stripping, the main body mechanism includes pedestal 1, control cabinet 7, speed controlling portion and pressure control portion,
In, the speed controlling portion includes stepper motor 8, stepper motor mounting plate 6, shaft coupling 15, active silicon rubber Kun 11 and one
To hold-down support 14, the stepper motor 8 is supported by the stepper motor mounting plate 6 is fixed, the motor shaft of the stepper motor 8
It is connected by the shaft coupling 15 with the active silica gel roller 11, the pair of hold-down support 14 is located at the active
The both ends of silica gel roller 11, the both ends of the active silica gel roller 11 are each passed through the default through-hole on the hold-down support 14；
The pressure control portion include a pair of of cylinder 9, a pair of of cylinder supports plate 4, a pair of of pressurization accessory plate 16, passive silica gel roller 10 with
And a pair of of pressure sensor 13, the passive silica gel roller 10 parallel within the active silica gel roller 11 top, it is described
The both ends of passive silica gel roller 10 are aligned with the both ends of the active silica gel roller 11, the cylinder 9, cylinder supports plate 4 and
Pressure sensor 13 is symmetrically located at the both ends of the passive silica gel roller 10, the cylinder supports plate 4 and the pressure
Sensor 13 is fixed by screws on the pedestal 1, and the cylinder 9 is located at the top of the cylinder supports plate 4 and passes through institute
Pressurization accessory plate 16 is stated to be connected with the passive silica gel roller 10, to pressurize to the passive silica gel roller 10, the pressure
Sensor 13 is located at the lower section of the hold-down support 14.
The material guide mechanism includes upper stock guide 18, lower stock guide 19 and mounting bracket 17, the upper stock guide 18
Height and tilt adjustable section, are used for laying upper layer prepreg tape, and the lower stock guide 19 is used for laying lower layer in being horizontally arranged
Prepreg tape, the mounting bracket 17 can be aluminum profile mounting bracket.
The mechanism for stripping includes cupping machine 20, the upper grip positioned at the intermediate hollowed out area of the cupping machine 20
21 and lower collet 24, the upper grip 21 is used to clamp the unglued end of upper layer prepreg tape 22, and the lower collet 24 is for clamping
The unglued end of lower layer's prepreg tape 23, the upper grip 21 and the lower collet 24 can be under the action of cupping machine 20
Shift relative.
In the present embodiment, prepreg can be placed respectively on the upper stock guide and lower stock guide of material guide mechanism, so
After two layers of prepreg can be subjected to laying between the active silica gel roller and passive silica gel roller, by cylinder to described
Passive silica gel roller applies pressure, to guarantee that two layers of prepreg is able to carry out bonding.In the present embodiment, the stepping electricity
Machine can under the driving of stepper motor driver, drive active silica gel roller rotation, thus drive passive silica gel roller into
Row rotation, so that prepreg is bonded and moved ahead between drive roll and passive guide roller.It in the present embodiment, can be after bonding
Prepreg lamination in cut prepreg test sample, one end of the sample be unglued end, the upper layer prepreg tape at the unglued end
It can be clamped by the upper grip of mechanism for stripping, lower layer's prepreg tape can be by the lower grips of mechanism for stripping, in upper grip under
When collet mutual principle movement, two layers of prepreg tape of laying is in the sample so as to being stripped.In the present embodiment, lead to
Cross the displacement and the corresponding power being applied on sample to upper grip and the operation of lower collet, so as to characterize two layers of prepreg tape it
Between adhesive property.
In one preferred embodiment of the application, the main body mechanism further includes temperature control part, the temperature control part packet
Include air-heater 3, heating tube 2, air-heater mounting plate 5 and a pair of of heating tube mounting bracket 12, wherein the air-heater mounting plate
5 are fixed on the cylinder supports plate 4, and the air-heater 3 is fixed on the heating tube 2 by the air-heater mounting plate 5
One end, the air outlet of the air-heater 3 are connected with the heating tube 2, and the both ends of the heating tube 2 pass through the heating respectively
Pipe mounting bracket 12 is fixed on the cylinder supports plate 4.In this way, the hot wind that air-heater 3 is blown out can be by equal in heating tube 2
The aperture of cloth heats prepreg surface.
It further include thermocouple (not shown), the thermoelectricity in the temperature control part in one preferred embodiment of the application
It is occasionally fixed in the heating tube 2, for measuring the temperature in the heating tube 2.
It include stepper motor driver, PLC, DC power supply, pressure in the control cabinet in one preferred embodiment of the application
Power amplifier, analog-digital converter, temp controlled meter and electromagnetic relay (being not shown), wherein the DC power supply is the step
It powers into motor driver, PLC, pressure amplifier, analog-digital converter, temp controlled meter and electromagnetic relay, what the PLC was generated
Pulse signal is driven the motor of the stepper motor by the stepper motor driver after stepper motor driver reception
Axis rotation；The pressure amplifier inputs the analog-to-digital conversion after amplifying the pressure simulation signal that the pressure sensor acquires
The pressure simulation signal is converted to pressure on the number signal by device；The temp controlled meter is for controlling and showing the heating tube
In temperature, the electromagnetic relay be used for control circuit on-off.
It further include pressure regulator valve (not shown), the pressure regulation in the pressure control portion in one preferred embodiment of the application
Valve is used to adjust the pressure in the cylinder.
The application also provides a kind of experimental method of adhesive property between test prepreg, and the experimental method can apply
In above-mentioned experimental provision, specifically, as shown in fig. 6, the experimental method may comprise steps of:
S1: prepreg is cut into 400 millimeters of length, wide 300 millimeters of upper layer prepreg tape and lower layer's prepreg tape simultaneously remove every
The backing paper for presoaking belt surface sticks a length of 50 millimeters in one end of every prepreg tape, the polyethylene film that width is 300 millimeters；
S2: upper layer prepreg tape is not pasted into the face-up of the film, lower layer's prepreg tape is not pasted to the face of the film
Downward, it is respectively placed on stock guide and lower stock guide；
S3: when the cylinder in the pressure control portion of the experimental provision is in loosening state, by the upper layer prepreg tape
Bypass the heating tube with lower layer's prepreg tape, two sides relatively pass through the active silica gel roller and the passive silica gel roller it
Between；
S4: by the air pressure of cylinder described in the pressure regulation valve regulation, the active silica gel roller and the passive silicon are compressed
Upper layer prepreg tape and lower layer's prepreg tape between rubber rollers；
S5: laying temperature is adjusted using the temp controlled meter, the revolving speed of the stepper motor is adjusted using the PLC；
S6: start the experimental provision and laying is carried out to the upper layer prepreg tape and lower layer's prepreg tape, and utilize the pressure
Force snesor and the thermocouple acquire pressure value and temperature value in lay-up process respectively；
S7: after the completion of laying, prepreg lamination after removing laying, the prepreg lamination is cut to it is 50 millimeters wide,
Long 400 millimeters of sample；
S8: one end unglued in the upper layer prepreg tape and lower layer's prepreg tape of the sample is held on the upper folder respectively
On head and lower collet；
S9: the upper grip and the lower collet are separated with pre-set velocity, the upper layer prepreg tape and lower layer are presoaked
Band is removed, and is recorded in drawing process by the cupping machine and be applied to power and the upper folder on the sample
Relation curve between head and the displacement of the lower collet；
S10: according to the relation curve of record, Average peel force is calculated, wherein the unit of the Average peel force is
N/50mm, and the Average peel force is determined as to the interlaminar bonding performance parameter of the sample.
It, can be by the average stripping in order to reduce error caused by single measurement in one preferred embodiment of the application
It is determined as after the interlaminar bonding performance parameter of the sample from power, further comprising the steps of:
S11: carrying out M lay-up process, and chooses a sample from the prepreg after each laying and carry out removing in fact
It tests, obtains corresponding M interlaminar bonding performance parameter；
S12: to the obtained M interlaminar bonding performance parameter averaged, and the obtained average value is true
It is set to the interlaminar bonding performance parameter of prepreg, wherein M is the integer more than or equal to 2.
Specifically, M can take 6 in the present embodiment, that is, carry out 6 measurement experiments, and 6 measurement experiments are obtained
To result seek average, so as to reduce the error of single measurement, guarantee the standard that adhesive property is tested between prepreg
True property.
Therefore the beneficial effects of the present application are as follows:
1) structure is simple: automatic placement process is simulated by two pressure rollers in the present invention, by the speed of active silica gel roller
The pressure of control and passive silica gel roller controls depositing speeds and laying pressure during simulating automatic placement, obtains in structure
Great simplification；
2) measurability of pressure: it can accurately be measured in simulation laid course by pressure sensor and prepreg is applied
Pressure facilitates influence of the research laying pressure to prepreg adhesive property；
3) at low cost, easy to operate: apparatus of the present invention structure is simple, and input cost is low, tests strong operability, user
Just.
Those skilled in the art are supplied to the purpose described to the description of the various embodiments of the application above.It is not
It is intended to exhaustion or be not intended to and limit the invention to single disclosed embodiment.As described above, the application's is various
Substitution and variation will be apparent for above-mentioned technology one of ordinary skill in the art.Therefore, although specifically begging for
Some alternative embodiments are discussed, but other embodiment will be apparent or those skilled in the art are opposite
It is easy to obtain.The application is intended to include all substitutions of the invention discussed herein, modification and variation, and falls in
Other embodiment in the spirit and scope of above-mentioned application.
Each embodiment in this specification is described in a progressive manner, same and similar between each embodiment
Part may refer to each other, what each embodiment stressed is the difference with other embodiments.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that there are many deformations by the application
With variation without departing from spirit herein, it is desirable to which the attached claims include these deformations and change without departing from the application
Spirit.
Claims (8)
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| CN201610225267.XA CN105675489B (en) | 2016-04-12 | 2016-04-12 | An experimental device and experimental method for testing the interlayer bonding performance of prepreg |
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| CN201610225267.XA CN105675489B (en) | 2016-04-12 | 2016-04-12 | An experimental device and experimental method for testing the interlayer bonding performance of prepreg |
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| CN107688000A (en) * | 2017-07-11 | 2018-02-13 | 浙江大学 | Method, system and the cantilevered stripping off device of stripping type measure prepreg viscosity |
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| CN109580477A (en) * | 2018-11-14 | 2019-04-05 | 中航复合材料有限责任公司 | A kind of automatic placement splices the detection method of intensity with prepreg |
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| CN113777024B (en) * | 2021-11-11 | 2022-03-25 | 北京玻钢院复合材料有限公司 | Evaluation device and evaluation method for evaluating quality consistency of composite material tape winding prepreg |
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