CN117147294A - Automatic wire laying prepreg joint quality testing device and characterization method - Google Patents
Automatic wire laying prepreg joint quality testing device and characterization method Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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Abstract
The disclosure provides a device for testing the quality of an automatic wire-laying prepreg joint and a characterization method, and relates to the technical field of aviation advanced composite material detection. The characterization method of the joint quality comprises the step of manufacturing a joint sample of the automatic wire-laying prepreg. Simulating an automatic wire laying process of the automatic wire laying prepreg based on the joint sample of the automatic wire laying prepreg; based on the simulation results, the maximum tension that the automated laid-up prepreg can withstand is obtained. Therefore, the method can accurately and effectively test the quality of the automatic wire-laying prepreg joint, provide data support for the improvement of the automatic wire-laying prepreg joint process, and further improve the length of the domestic automatic wire-laying prepreg.
Description
Technical Field
The disclosure relates to the technical field of advanced composite material detection in aviation, in particular to a device for testing the quality of an automatic wire-laying prepreg joint and a characterization method.
Background
With the development of aviation composite material technology, based on the characteristics of high quality, high precision and high reliability of an automatic wire laying technology, the automatic wire laying technology becomes a key technology for manufacturing a complex-structure and large-curvature radius rotator (such as a fuselage-wing body fusion body, an air inlet channel and a radome). The automatic wire laying technology adopts prepreg tows as raw materials, and the length of the prepreg tows directly influences the automatic laying efficiency. In general, in actual production, prepreg tow products are lapped and joints are formed at the lap joints to increase the length of the prepreg tow products, and thus, it is critical to ensure that the joints meet prescribed performance requirements.
In view of the foregoing, it is desirable to provide a method for characterizing the joint quality of an automated laid prepreg.
Disclosure of Invention
The following is a summary of the subject matter of the detailed description of the present disclosure. This summary is not intended to limit the scope of the claims.
The disclosure provides a characterization method of joint quality of automatic wire-laying prepreg and a testing device of joint quality of automatic wire-laying prepreg.
According to some embodiments, a first aspect of the present disclosure provides a method of characterizing joint quality of an automated laid-up prepreg, the method of characterizing joint quality comprising:
manufacturing a joint sample of the automatic wire-laying prepreg;
simulating an automatic wire laying process of the automatic wire laying prepreg based on the joint sample of the automatic wire laying prepreg;
based on the simulation results, the maximum tension that the automated laid-up prepreg can withstand is obtained.
According to some embodiments of the present disclosure, based on the simulation results, the step of obtaining the maximum tension that the automated laid-up prepreg can withstand comprises:
obtaining a first tension based on the first simulation, wherein the first tension breaks at least one joint in a joint sample of the automated laid-up prepreg;
performing a second simulation and judging whether a joint in the joint sample of the automatic wire-laying prepreg is disconnected under the first tension;
if the joint breaks, the first tension is the maximum tension that the automatic laid-up prepreg can withstand;
if the joint is not disconnected, performing third simulation, and judging whether the joint in the joint sample of the automatic wire-laying prepreg is disconnected or not under the first tension;
if the joint breaks, the first tension is the maximum tension that the automatic laid-up prepreg can withstand;
and if the joint is not broken, adjusting the first tension until the joint is broken, wherein the corresponding second tension is the maximum tension bearable by the automatic wire laying prepreg.
According to some embodiments of the present disclosure, the joint sample of the automated laid-up prepreg comprises at least five joints; and/or
The length of each joint ranges from 10mm to 100mm, and the distance between every two adjacent joints ranges from 1000mm to 10000mm.
According to some embodiments of the present disclosure, the step of simulating an automated wire lay-up process of the automated wire lay-up prepreg based on the joint sample of the automated wire lay-up prepreg comprises:
fixing the joint sample of the automatic wire-laying prepreg on a tension roller in a yarn box;
separating the isolating film of the joint sample of the automatic wire-laying prepreg from yarns of the joint sample of the automatic wire-laying prepreg, and fixing the isolating film on an isolating film unreeling roller in the yarn box;
threading is carried out, so that the yarn passes through a fixed roller group in the yarn box;
fixing the yarn passing through the fixed roller group on a winding roller in a yarn box;
and (5) carrying out simulation of the automatic wire laying process of the wire laying material under preset conditions.
According to some embodiments of the disclosure, the preset conditions include:
the temperature in the yarn box is 14 ℃ and 2 ℃, and the relative humidity in the yarn box is not more than 65%; and/or
The tension roller applies the yarn tension on the yarn according to a preset rule; and/or
The winding rod rotates at a preset speed; and/or
The fixed roller groups are arranged in a preset mode to form a yarn laying path of the yarn.
According to some embodiments of the present disclosure, after fixing the joint sample of the automatic laid-up prepreg on the tension roller in the yarn box, the step before separating the release film of the joint sample of the automatic laid-up prepreg from the yarns of the joint sample of the automatic laid-up prepreg further comprises:
placing the splice sample of the automatic laid-up prepreg in the yarn box for at least 1h.
According to some embodiments, a second aspect of the present disclosure provides a test device for joint quality of an automatic wire-laying prepreg, the test device being used in the method for characterizing joint quality of an automatic wire-laying prepreg according to any one of the above embodiments, the test device comprising a yarn box, and an isolation film unwinding roller, a tension roller, a fixed roller group and a winding roller, which are sequentially disposed in the yarn box on a wire-laying direction of the automatic wire-laying prepreg;
the isolating film unreeling roller is used for unreeling and recycling the isolating film of the automatic wire-laying prepreg; the tension roller is used for discharging the material roll of the automatic wire-laying prepreg and applying an adjustable Zhang Liyu to yarns of the material roll of the automatic wire-laying prepreg; the fixed roller group is used for limiting a yarn laying path of the yarn of the material roll of the automatic yarn laying prepreg; the wind-up roll is used for adjusting the advancing speed of the material roll.
According to some embodiments of the present disclosure, the fixed roller set includes a first fixed roller set, a second fixed roller set, and a connecting fixed roller located between the first fixed roller set and the second fixed roller set;
the first fixed roller group comprises a plurality of first fixed rollers, the rotation directions of the adjacent first fixed rollers are different, the second fixed roller group comprises a plurality of second fixed rollers, the rotation directions of the adjacent second fixed rollers are different, and the rotation directions of the connecting fixed rollers are the same as the rotation directions of the adjacent first fixed rollers and the second fixed rollers.
According to some embodiments of the disclosure, a constant temperature and humidity system is disposed within the yarn box.
According to some embodiments of the present disclosure, the constant temperature and humidity system includes: the device comprises a temperature regulator, a humidity regulator, a temperature sensor in signal connection with the temperature regulator, a humidity sensor in signal connection with the humidity regulator and a fan; wherein the temperature sensor is on the same side as the tension roller; the humidity sensor is positioned between the humidity regulator and the tension roller; the fan is arranged at one side far away from the temperature sensor and the humidity sensor and at the same side with the winding rod.
In the characterization method of the joint quality of the automatic wire-laying prepreg, the maximum sustainable tension of the automatic wire-laying prepreg is obtained through simulating the self-wire-laying process, the joint quality of the automatic wire-laying prepreg can be accurately and effectively tested, data support is provided for the improvement of the joint process of the automatic wire-laying prepreg, the length of the domestic automatic wire-laying prepreg is further improved, and a good guiding effect is provided for the development of an automatic wire-laying prepreg system.
Other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the embodiments of the disclosure. In the drawings, like reference numerals are used to identify like elements. The drawings, which are included in the description, are some, but not all embodiments of the disclosure. Other figures can be obtained from these figures without inventive effort for a person skilled in the art.
FIG. 1 is a flow diagram illustrating a method of characterizing joint quality of an automatic laid-up silk prepreg, according to an example embodiment.
Fig. 2 is a schematic view of a portion of a structure of a joint sample of an automatic laid-up prepreg according to an exemplary embodiment.
Fig. 3 is a schematic structural view of a testing apparatus for joint quality of an automatic wire-laid prepreg according to an exemplary embodiment.
Reference numerals illustrate:
1-a testing device; 11-yarn box; 12-an isolating film unreeling roller; 13-tension roller; 14-fixing the roller group; 141-a first fixed roller set; 141 a-a first fixed roller; 142-a second fixed roller set; 142 a-a second fixed roller; 143-connecting a fixed roller; 15-a wind-up roll; 16-a constant temperature and humidity system; 161-temperature regulator; 162-hygrometer; 163-temperature sensor; 164-a humidity sensor; 165-fans;
2-automatically laying a joint sample of the silk prepreg; 21-yarn; 22-linker; 23-isolating film.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some embodiments of the present disclosure, but not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person skilled in the art would obtain without making any inventive effort are within the scope of protection of this disclosure. It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be arbitrarily combined with each other.
The automatic wire laying technology not only realizes localization of a wire laying machine, but also realizes localization of wire laying materials, and the length of the automatic wire laying prepreg roll is a main influencing factor from the aspect of the laying efficiency. At present, the domestic automatic wire-laying prepreg joint process is not mature, so that the domestic wire-laying prepreg length can only be controlled within 1000 meters, and the length is mainly controlled by the master batch length. The foreign technology has a mature joint process and an accurate evaluation method, the length of the automatic wire laying material can reach 2500 meters, and the production efficiency can be effectively improved, so that the inventor is forced to explore a proper joint process and an appropriate evaluation method.
The quality of the joint is guaranteed that whether the prepreg tows can be laid smoothly, if the joint breaks in the automatic laying process, the prepreg tows can be clamped in a laying pipeline, equipment is stopped, and the laying efficiency is affected. At present, the method for verifying the performance of the prepreg tow joint has the problem that the test result obtained by the method is inaccurate due to the fact that the environment and the use scene of automatic laying of the tows are separated.
In view of this, embodiments of the present disclosure provide a method of characterizing joint quality of an automatic laid-up prepreg, the method of characterizing joint quality comprising fabricating a joint sample of the automatic laid-up prepreg. Based on the joint sample of the automatic wire-laying prepreg, the automatic wire-laying process of the automatic wire-laying prepreg is simulated. Based on the simulation results, the maximum tension that the automated laid prepreg can withstand is obtained. Therefore, the quality of the automatic wire-laying prepreg joint obtained by simulating the automatic wire-laying process of the automatic wire-laying prepreg is more accurate, data support is provided for the improvement of the automatic wire-laying prepreg joint process, and the length of the domestic automatic wire-laying prepreg is further improved.
Embodiments of the present disclosure are described below with reference to fig. 1, 2 and 3. Fig. 1 provides a schematic flow chart of a method for characterizing joint quality of an automatic wire-laying prepreg, fig. 2 provides a schematic partial structure diagram of a joint sample of an automatic wire-laying prepreg, and fig. 3 provides a schematic structure diagram of a device for testing joint quality of an automatic wire-laying prepreg. Exemplary embodiments of the present disclosure provide a method of characterizing joint quality of an automatic laid-up prepreg, the method of characterizing joint quality comprising the steps of:
step S100: a joint sample 2 of an automatic laid prepreg was produced.
As an example, the procedure for making joint sample 2 of automatic laid prepreg is as follows: first, the prepreg tows were taken out from the refrigerator and placed in a constant temperature and humidity test box. Next, after a period of time, for example, 8 hours, the prepreg tows are removed from the constant temperature and humidity test chamber, cut to form a plurality of identical or nearly identical tows, and the excess material is returned to the constant temperature and humidity test chamber. The two prepreg tows are then removed and placed on a splice device, and the position of the tows is adjusted so that the portion between the tows for the joint 22 is completely covered. The splice device is then activated and operating conditions of the splice device, such as pressure and temperature, are set to effect formation of the joint 22 between the two prepreg tows. Finally, repeating the two steps, splicing a plurality of prepreg tows together, finally forming a joint sample 2 of the automatic wire-laying prepreg, and freezing and preserving the prepared joint sample 2 of the automatic wire-laying prepreg.
It should be understood that the above examples merely provide a method for producing a joint sample of an automatic wire-laying prepreg, and are not limited to producing a joint sample of an automatic wire-laying prepreg. For example, cutting to form a plurality of tows may be accomplished by scissors or a cutter; for example, the joint portions of the plurality of cut tows may form a fitting structure, and specifically, the portion of one of the tows corresponding to the joint is cut into a "convex" shape, and the portion of the other of the tows corresponding to the joint formed by the fitting of the one of the tows into a "concave" shape; for another example, the setting of the working parameters of the splicing device is not limited to the pressure, temperature, etc. in the above example, and may be selected according to the material of the filament bundle. Specific steps and manufacturing parameters of the method for manufacturing the joint sample of the automatic wire-laying prepreg can be designed according to actual requirements, and detailed description is omitted herein.
Step S200: the automatic wire laying process of the automatic wire laying prepreg was simulated based on the joint sample 2 of the automatic wire laying prepreg.
As an example, in the joint sample 2 of the automatic wire-laying prepreg to be manufactured and stored frozen, an automatic wire-laying process of the automatic wire-laying prepreg is simulated, and the joint sample 2 of the automatic wire-laying prepreg is provided in plurality. The simulation of the automatic filament laying may be performed on an automatic filament laying apparatus or in the test device 1 for the joint quality of an automatic filament laying prepreg, for example, in fig. 3.
Step S300: based on the simulation results, the maximum tension that the automated laid prepreg can withstand is obtained.
As an example, from the simulation result of the automatic filament laying process of the automatic filament laying prepreg in the above-described step, the maximum tension that the automatic filament laying prepreg corresponding to the joint sample 2 of the automatic filament laying prepreg can withstand can be obtained, and the result is obtained based on the simulation of the actual automatic filament laying process, which is of more practical guiding significance for improving the manufacturing process of the automatic filament laying prepreg joint 22 and increasing the length of the automatic filament laying prepreg.
The automatic wire laying simulation process of the automatic wire laying prepreg based on the joint sample 2 of the automatic wire laying prepreg and the joint sample 2 of the automatic wire laying prepreg described above, in some embodiments, the step of obtaining the maximum tension bearable by the automatic wire laying prepreg based on the simulation result includes:
first, based on a first simulation, a first tension is obtained, wherein the first tension breaks at least one joint 22 in a joint sample 2 of the automatic laid-up prepreg.
As an example, as shown in fig. 3, the process of simulating the automatic wire laying using the joint sample 2 of the automatic wire laying prepreg is such that the tension rod adjusts the tension variation applied to the automatic wire laying prepreg of the joint sample 2 of the automatic wire laying prepreg, specifically, the tension varies according to a preset rule, specifically, the tension tends to become larger as a whole with the lapse of time. As the automatic wire laying time increases, at least one joint 22 of the joint sample 2 of the automatic wire laying prepreg is broken, and the tension applied to the automatic wire laying prepreg by the corresponding tension rod is the first tension.
After the first simulation was performed to obtain a first tension to break at least one joint 22 in the joint sample 2 of the automatic wire-laying prepreg, a second simulation was performed to determine whether the joint 22 in the joint sample 2 of the automatic wire-laying prepreg was broken under the first tension. As an example, as shown in fig. 3, the process of automatically laying the filaments is simulated by using a new joint sample 2 of the automatic filament-laying prepreg, while the tension rod adjusts the tension variation applied to the automatic filament-laying prepreg of the joint sample 2 of the automatic filament-laying prepreg according to the same preset rule as the first simulation, and judges whether or not the phenomenon of disconnection of at least one joint 22 occurs in the joint sample 2 of the automatic filament-laying prepreg when the tension of the automatic filament-laying prepreg applied to the joint sample 2 of the automatic filament-laying prepreg by the tension rod reaches the first tension.
Based on the result of the second simulation, the judgment is performed as follows:
if the joint 22 breaks, the first tension is the maximum tension that the automated laid-up prepreg can withstand. In this way, the problem that the quality of the joint sample 2 of the automatic wire-laying prepreg in the first simulation or the joint sample 2 of the automatic wire-laying prepreg in the second simulation is poor and the sustainable maximum tension judgment of the automatic wire-laying prepreg is affected is solved, and the reliability of the measurement result is ensured.
If the joint 22 is not broken, performing a third simulation to determine if the joint 22 in the joint sample 2 of the automatic wire-laid prepreg is broken under the first tension; if the joint 22 breaks, then the first tension is the maximum tension that the automated laid-up prepreg can withstand; if the joint 22 does not break, the first tension is adjusted until the joint 22 breaks, at which point the corresponding second tension is the maximum tension that the automated laid-up prepreg can withstand.
As an example, if the joint 22 in the joint sample 2 of the automatic wire-laying prepreg is not broken during the second simulation in the period in which the tension of the automatic wire-laying prepreg applied to the joint sample 2 of the automatic wire-laying prepreg by the tension rod reaches the first tension, the third simulation with the joint sample 2 of a new automatic wire-laying prepreg is performed. In the process of the third simulation, the tension rod adjusts the tension change applied to the automatic wire-laying prepreg of the joint sample 2 of the automatic wire-laying prepreg according to the same preset rule as the first simulation and the second simulation, and judges whether the joint 22 in the joint sample 2 of the automatic wire-laying prepreg is broken or not in the period that the tension of the automatic wire-laying prepreg applied to the joint sample 2 of the automatic wire-laying prepreg by the tension rod reaches the first tension.
If the joint 22 in the joint sample 2 of the automatic laid prepreg during the third simulation is broken, it represents that the first tension is the maximum tension that the automatic laid prepreg can withstand. Meanwhile, the reason for the joint sample 2 itself of the automatic wire-laying prepreg in the second simulation may also be determined, so that the joint 22 in the joint sample 2 of the corresponding automatic wire-laying prepreg is not broken during the period in which the tension of the automatic wire-laying prepreg applied to the joint sample 2 of the corresponding automatic wire-laying prepreg by the tension rod reaches the first tension in the second simulation.
If the joint sample 2 of the corresponding automatic filament-laid prepreg is not broken at the first tension during the third simulation, the tension roller 13 will continue to adjust the tension variation applied to the automatic filament-laid prepreg of the joint sample 2 of the corresponding automatic filament-laid prepreg according to the above-mentioned preset rule so that the tension roller 13 applies to the automatic filament-laid prepreg of the joint sample 2 of the automatic filament-laid prepreg more than the first tension until the joint 22 is broken in the joint sample 2 of the corresponding automatic filament-laid prepreg during the third simulation, and then the second tension applied to the automatic filament-laid prepreg of the joint sample 2 of the automatic filament-laid prepreg by the corresponding tension roller 13 is the maximum tension that the automatic filament-laid prepreg can withstand. Meanwhile, it was also confirmed that the quality problem of the joint sample 2 itself, which is the automatic wire-laid prepreg in the first simulation, caused the phenomenon that the joint 22 was broken when the tension applied by the tension roller 13 reached the first tension, whereas the joint sample 2, which is the automatic wire-laid prepreg in the second simulation, did not show the phenomenon that the joint 22 was broken when the tension applied by the tension roller 13 reached the first tension. In this way, the multiple simulation process eliminates the effect of other factors such as the quality problems present on the joint sample 2 itself of the automatic laid prepreg on the characterization result of the joint quality, relative to the single simulation process alone, thereby improving the accuracy of obtaining the maximum tension that the automatic laid prepreg can withstand.
In addition to describing in detail how the maximum tension that the automatic laid-up prepreg can withstand is determined based on the results of the different simulation processes, the present embodiment also defines the splice sample 2 of the automatic laid-up prepreg used in the simulation process described in the above embodiment.
In some embodiments, the joint sample 2 of the automated laid-up prepreg includes at least five joints 22. Based on the above embodiments, in some embodiments, each tab 22 has a length in the range of 10mm-100mm and a spacing between adjacent tabs 22 in the range of 1000mm-10000mm. In this way, the specification of the joint sample 2 of the automatic wire-laying prepreg is set, so that the joint sample 2 based on the automatic wire-laying prepreg has more fitting production requirements obtained in the simulated automatic wire-laying process, and the joint quality in the joint sample 2 of the automatic wire-laying prepreg and the length of the automatic wire-laying prepreg are improved.
It should be understood that the joint samples of the automatic wire-laying prepregs used in the first simulation, the second simulation and the third simulation are joint samples of the automatic wire-laying prepregs having the same parameters obtained by the same manufacturing process, and the parameters of the joint samples of the automatic wire-laying prepregs are not limited to the above examples, and will not be described herein.
In addition, the present embodiment describes an automatic wire laying process, for example, in some embodiments, the step of simulating an automatic wire laying process of an automatic wire laying prepreg based on the joint sample 2 of the automatic wire laying prepreg includes: first, the joint sample 2 of the automatic wire-laying prepreg is fixed on the tension roller 13 in the yarn box 11, specifically, the joint sample 2 of the automatic wire-laying prepreg is wound on a spool to form a roll, and then the roll is fixed on the tension roller 3. Thereafter, the separator 23 of the joint sample 2 of the automatic wire-laid prepreg is separated from the yarn 21 of the joint sample 2 of the automatic wire-laid prepreg, and the separator 23 is fixed to the separator unwinding roller 12 in the yarn box 11. Threading is then carried out so that the yarn 21 passes through the set of fixed rollers 14 inside the box 11. Next, the yarn 21 passing through the fixed roller group 14 is fixed to the take-up roller in the yarn case 11. And finally, carrying out simulation of the automatic wire laying material wire laying process under preset conditions.
Based on the above-mentioned automatic wire laying process simulation, the present embodiment also defines preset conditions for the automatic wire laying process simulation. For example, in some embodiments, the preset conditions include: the temperature in the yarn box 11 is 14 ℃ and 2 ℃, and the relative humidity in the yarn box 11 is not more than 65%; and/or tension roller 13 applies tension to yarn 21 with a preset law; and/or the winding rod rotates at a preset speed; and/or the fixed roller sets 14 are arranged in a preset manner to form a yarn laying path for the yarn 21.
Based on the above examples, the joint sample 2 of the automatic wire-laying prepreg after being manufactured is frozen and preserved, and therefore, in this example, it is specifically described how to participate in the simulation of the automatic wire-laying process after the joint sample 2 of the frozen and preserved automatic wire-laying prepreg is processed, without affecting the test result.
For example, in some embodiments, after fixing the joint sample 2 of the automatic wire-laying prepreg on the tension roller 13 in the yarn box 11, the step before separating the separator film 23 of the joint sample 2 of the automatic wire-laying prepreg from the yarns 21 of the joint sample 2 of the automatic wire-laying prepreg further includes: the splice sample 2 of the automatic laid prepreg is placed in the yarn box 11 for at least 1h.
As one example, the description is directed to a T800 automated laid-up prepreg joint quality test.
First, joint samples 2 of automatic wire-laid prepregs were produced, each of which joint samples 2 of automatic wire-laid prepregs included five joints 22, the length of the joints 22 was 50mm, and the pitch between adjacent joints 22 was 5000mm. The joint sample 2, on which the automatic wire-laying prepreg was fabricated, was stored by freezing, and before the experiment, the T800 automatic wire-laying prepreg sample was taken out of the freezer, left at a predetermined temperature, for example, room temperature for at least 8 hours, and then opened for packaging. Next, the environment in the yarn box 11 of the test device 1 for automatic yarn-laying prepreg joint quality was adjusted, the yarn box 11 environment temperature was controlled to 15 ℃, the relative humidity was not more than 45%, and the joint sample 2 of the thawed automatic yarn-laying prepreg to be tested was allowed to stand on the tension roller 13 fixed in the yarn box 11 for at least one hour until the temperature and humidity of the joint sample 2 itself of the automatic yarn-laying prepreg were the same as the temperature and humidity of the yarn box 11. Then, the automatic wire laying process simulation is performed, and specific steps of the automatic wire laying process simulation can be referred to the description in the embodiments, and will not be described herein. The speed of the tension roller 13 and the speed of the wind-up roller 15 in the simulation of the automatic wire laying process are respectively set to 9.6m/min, the preset rule of tension adjustment of the tension roller 13 is set to (20+n10) newtons, wherein n is the number of times the joint sample 2 of the automatic wire laying prepreg can be subjected to one wire laying process in the test device 1, namely the wire of the joint sample 2 of the automatic wire laying prepreg runs through the path set once, that is, after each wire laying path is completed for the joint sample 2 of one automatic wire laying prepreg, the tension applied to the wire of the joint sample 2 of the automatic wire laying prepreg by the tension roller is increased by 10 newtons until the phenomenon that the joint 22 breaks occurs in the joint sample 2 of the automatic wire laying prepreg, thereby stopping the simulation of the automatic wire laying process.
Then, the joint sample 2 of the automatic wire-laying prepreg obtained by different joint 22 processes can be subjected to the characterization method of the joint quality of the automatic wire-laying prepreg according to the method, so that the bearable maximum tension of the T800 automatic wire-laying prepreg joint 22 under different manufacturing conditions is obtained, and the improvement of the length of the joint sample is of guiding significance.
Specifically, the joint sample 2 of three types of automatic wire-laying prepregs obtained by three joint processes was subjected to the above-described characterization method of joint quality of automatic wire-laying prepregs, the first type: the joint 22 process of the joint sample 2 of the automatic wire-laying prepreg is at the temperature of 60 ℃ and the pressure of 0.6MPa for 1min; second type: the joint 22 process of the joint sample 2 of the automatic wire-laying prepreg is at the temperature of 60 ℃ and the pressure of 0.6MPa for 1min; third type: the joint 22 process of the joint sample 2 of the automatic wire-laying prepreg is at the temperature of 80 ℃ and the pressure of 0.6MPa for 1min. The test results of the joint sample 2 of the three types of automatic wire-laid prepregs are recorded and analyzed below.
Table 1T800 table for joint quality test records for different joint processes of automatic filament lay-up prepregs
Based on the above results, according to the above method for characterizing the joint quality of the automatic wire-laying prepreg, the maximum sustainable tension of the second type of the corresponding joint 22 is 60N, and the maximum sustainable tension of the first type of the corresponding joint 22 and the third type of the corresponding joint 22 are both 50N, that is, for the T800 automatic wire-laying prepreg, the joint quality obtained by using the process parameters of 60 ℃ and 0.6MPa for 1min to manufacture the joint sample 2 of the automatic wire-laying prepreg is the best, so that the length of the T800 automatic wire-laying prepreg can be more effectively improved. In addition, according to the embodiment, the characterization method of the joint quality of the automatic wire-laying prepreg in the embodiment has the advantages of high automation degree, strong operability, high precision and convenience for actual operation, and can be effectively prevented from being interfered by people, and can be widely applied to the quality evaluation of various automatic wire-laying prepreg joints.
The embodiment also provides a testing device for the joint quality of the automatic wire-laying prepreg, as shown in fig. 3, the testing device 1 is used for the method for characterizing the joint quality of the automatic wire-laying prepreg in any one of the above embodiments, and the testing device 1 comprises a yarn box 11, and a barrier film unwinding roller 12, a tension roller 13, a fixed roller group 14 and a winding roller 15 which are sequentially arranged in the yarn box 11 in the wire-laying direction of the automatic wire-laying prepreg. The separator unwinding roller 12 is used for unwinding and recovering a separator 23 of an automatic wire-laid prepreg. The tension roller 13 is used for unwinding of the roll of automatic filament-laying prepreg and for applying an adjustable tension to the yarn 21 of the roll of automatic filament-laying prepreg. The fixed roller set 14 is used to define a yarn laying path for the yarns 21 of the roll of automatic yarn laying prepreg; the wind-up roll 15 is used for adjusting the travelling speed of the material roll.
Therefore, the automatic wire laying prepreg finally reaches the winding roller from the tension roller through the fixed roller group 14 to complete a wire laying process, which is the same as a wire laying mode of the actual wire laying process, and the winding roller is utilized to replace wire laying operation, so that the production cost is greatly reduced on the premise of not influencing the simulation effect of the automatic wire laying process.
Based on the structure of the test device 1 for the quality of the automatic laid-up prepreg joint in the above embodiment, in some embodiments, the tension roller 13 is made of metal, and the tension of the yarn 21 applied to the roll of the automatic laid-up prepreg by the tension roller 13 is adjusted by hydraulic pressure. In this way, the friction between the tension roller 13 and the automatic wire-laying prepreg is reduced, thereby reducing the impact of the tension roller on the characterization result of the joint quality of the automatic wire-laying prepreg.
Based on the above embodiments, in some embodiments, the separator unwind roller 12 is a metal material. In this way, the influence of the tension roller 13 and the release film unwinding roller 12 on the characterization result of the joint quality of the automatic wire-laying prepreg is reduced.
Based on the above embodiments, in some embodiments, the wind-up roller 15 is made of metal, and the rotation speed is adjustable. In this way, the influence of the tension roller 13, the isolating film unreeling roller 12 and the reeling roller 15 on the characterization result of the joint quality of the automatic wire-laying prepreg is reduced
Based on the above embodiments, in some embodiments, the fixed roller set 14 is made of metal and has a rough surface. In at least one embodiment, the surface roughness of the set of fixed rollers 14 is 0.8 μm. In this way, the influence of the wire laying path formed by the fixed roller group 14 on the wire is closer to the influence of the wire laying path on the wire in the actual wire laying process, so that the characterization result of the joint quality of the automatic wire laying prepreg has more practical guidance significance.
In addition, the tension roller 13, the release film unwinding roller 12 and the winding roller 15 are further designed in this embodiment, for example, in some embodiments, the surface of the tension roller 13 is provided with rubber air-swelling fixing points. For another example, in some embodiments, the release film unwind roll 12 surface is provided with rubber inflatable fixation points. For another example, in some embodiments, the surface of the wind-up roll 15 is provided with rubber inflatable fixation points. In this way, the coil of the joint sample 2 of the automatic wire-laying prepreg or the coil of the automatic wire-laying prepreg is conveniently fixed to the corresponding stick, and the operation convenience of the device is improved.
In some embodiments, the fixed roller set 14 includes a first fixed roller set 141, a second fixed roller set 142, and a connecting fixed roller 143 located between the first fixed roller set 141 and the second fixed roller set 142. The first fixed roller group 141 includes a plurality of first fixed rollers 141a, for example, four first fixed rollers 141a, and the rotation directions of the adjacent first fixed rollers 141a are different, the second fixed roller group 142 includes a plurality of second fixed rollers 142a, for example, four second fixed rollers 142a, and the rotation directions of the adjacent second fixed rollers 142a are different, and the rotation directions of the connecting fixed roller 143 are the same as the rotation directions of the adjacent first fixed rollers 141a and second fixed rollers 142a, respectively.
It should be understood that the number of the first fixed rollers 141a in the first fixed roller group 141 and the number of the second fixed rollers 142a in the second fixed roller group 142 are not limited to four in the above-described embodiment, and may be two, three or more, and the number of the first fixed rollers 141a in the first fixed roller group 141 and the number of the second fixed rollers 142a in the second fixed roller group 142 may be equal or unequal. In addition, the rotational directions of the different fixed rollers and the connecting fixed roller 143 are set based on the path of the yarn 21, which is not limited to the above-described manner of setting in the example. These can be designed according to actual requirements, and will not be described here.
As shown in fig. 3, in some embodiments, a constant temperature and humidity system 16 is provided within the yarn box 11. Thus, the temperature and the humidity in the yarn box 11 can be favorably regulated and controlled, so that the simulation process of automatic yarn laying is carried out under a preset constant temperature and humidity condition.
In at least some embodiments, the constant temperature and humidity system 16 includes: a temperature regulator 161, a humidity regulator 162, a temperature sensor 163 in signal connection with the temperature regulator 161, a humidity sensor 164 in signal connection with the humidity regulator 162, and a fan 165; wherein the temperature sensor 163 is on the same side as the tension roller 13; humidity sensor 164 is located between hygrometer 162 and tension roller 13; the fan 165 is disposed on the side away from the temperature sensor 163 and the humidity sensor 164 and on the same side as the winding roller.
It should be understood that the design of the constant temperature and humidity system 16 is not limited to the above embodiment, and specifically, the temperature regulator 161 and the humidity regulator 162 may be configured as an integrated structure of temperature and humidity regulation, and are not limited to the split structure in the above example. For another example, the arrangement positions of the parts in the constant temperature and humidity system 16 are not limited to the design distribution illustrated in fig. 3, and may be designed according to actual requirements, and will not be described herein.
In this disclosure, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in an article or apparatus that comprises the element.
While the preferred embodiments of the present disclosure have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the disclosure.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the spirit or scope of the disclosure. Thus, given that such modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the intent of the present disclosure is to encompass such modifications and variations as well.
Claims (10)
1. The method for characterizing the joint quality of the automatic wire-laying prepreg is characterized by comprising the following steps of:
manufacturing a joint sample of the automatic wire-laying prepreg;
simulating an automatic wire laying process of the automatic wire laying prepreg based on the joint sample of the automatic wire laying prepreg;
based on the simulation results, the maximum tension that the automated laid-up prepreg can withstand is obtained.
2. The method of characterizing joint quality according to claim 1, wherein the step of obtaining the maximum tension that the automated laid-up prepreg can withstand based on the simulation results comprises:
obtaining a first tension based on the first simulation, wherein the first tension breaks at least one joint in a joint sample of the automated laid-up prepreg;
performing a second simulation and judging whether a joint in the joint sample of the automatic wire-laying prepreg is disconnected under the first tension;
if the joint breaks, the first tension is the maximum tension that the automatic laid-up prepreg can withstand;
if the joint is not disconnected, performing third simulation, and judging whether the joint in the joint sample of the automatic wire-laying prepreg is disconnected or not under the first tension;
if the joint breaks, the first tension is the maximum tension that the automatic laid-up prepreg can withstand;
and if the joint is not broken, adjusting the first tension until the joint is broken, wherein the corresponding second tension is the maximum tension bearable by the automatic wire laying prepreg.
3. The method of characterizing joint quality according to claim 1, wherein the joint sample of the automated laid-up prepreg comprises at least five joints; and/or
The length of each joint ranges from 10mm to 100mm, and the distance between every two adjacent joints ranges from 1000mm to 10000mm.
4. The method of characterizing joint quality according to claim 1, wherein the step of simulating an automated wire lay-up process of the automated wire lay-up prepreg based on the joint sample of the automated wire lay-up prepreg comprises:
fixing the joint sample of the automatic wire-laying prepreg on a tension roller in a yarn box;
separating the isolating film of the joint sample of the automatic wire-laying prepreg from yarns of the joint sample of the automatic wire-laying prepreg, and fixing the isolating film on an isolating film unreeling roller in the yarn box;
threading is carried out, so that the yarn passes through a fixed roller group in the yarn box;
fixing the yarn passing through the fixed roller group on a winding roller in a yarn box;
and (5) carrying out simulation of the automatic wire laying process of the wire laying material under preset conditions.
5. The method for characterizing joint quality according to claim 4, wherein the preset conditions include:
the temperature in the yarn box is 14 ℃ and 2 ℃, and the relative humidity in the yarn box is not more than 65%; and/or
The tension roller applies the yarn tension on the yarn according to a preset rule; and/or
The winding rod rotates at a preset speed; and/or
The fixed roller groups are arranged in a preset mode to form a yarn laying path of the yarn.
6. The method of characterizing joint quality according to claim 5, wherein after fixing the joint sample of the automatic wire-laying prepreg on a tension roller in a yarn box, the step before separating the release film of the joint sample of the automatic wire-laying prepreg from the yarn of the joint sample of the automatic wire-laying prepreg further comprises:
placing the splice sample of the automatic laid-up prepreg in the yarn box for at least 1h.
7. A test device for the joint quality of an automatic wire-laying prepreg, which is characterized by being used for the characterization method of the joint quality of the automatic wire-laying prepreg according to any one of claims 1-6, wherein the test device comprises a yarn box, and an isolating film unreeling roller, a tension roller, a fixed roller group and a reeling roller which are sequentially arranged in the yarn box on the wire-laying trend of the automatic wire-laying prepreg;
the isolating film unreeling roller is used for unreeling and recycling the isolating film of the automatic wire-laying prepreg; the tension roller is used for discharging the material roll of the automatic wire-laying prepreg and applying an adjustable Zhang Liyu to yarns of the material roll of the automatic wire-laying prepreg; the fixed roller group is used for limiting a yarn laying path of the yarn of the material roll of the automatic yarn laying prepreg; the wind-up roll is used for adjusting the advancing speed of the material roll.
8. The test device of claim 7, wherein the set of fixed rollers comprises a first set of fixed rollers, a second set of fixed rollers, and a connecting fixed roller positioned between the first set of fixed rollers and the second set of fixed rollers;
the first fixed roller group comprises a plurality of first fixed rollers, the rotation directions of the adjacent first fixed rollers are different, the second fixed roller group comprises a plurality of second fixed rollers, the rotation directions of the adjacent second fixed rollers are different, and the rotation directions of the connecting fixed rollers are the same as the rotation directions of the adjacent first fixed rollers and the second fixed rollers.
9. The test device according to claim 7 or 8, wherein a constant temperature and humidity system is provided in the yarn box.
10. The test device of claim 9, wherein the constant temperature and humidity system comprises: the device comprises a temperature regulator, a humidity regulator, a temperature sensor in signal connection with the temperature regulator, a humidity sensor in signal connection with the humidity regulator and a fan;
wherein the temperature sensor is on the same side as the tension roller; the humidity sensor is positioned between the humidity regulator and the tension roller; the fan is arranged at one side far away from the temperature sensor and the humidity sensor and at the same side with the winding rod.
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| CN202311110934.6A CN117147294A (en) | 2023-08-30 | 2023-08-30 | Automatic wire laying prepreg joint quality testing device and characterization method |
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