CN118817493B - High-temperature thermal expansion performance testing device in high-heat-conductivity high-modulus carbon fiber - Google Patents
High-temperature thermal expansion performance testing device in high-heat-conductivity high-modulus carbon fiber Download PDFInfo
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- CN118817493B CN118817493B CN202411297414.5A CN202411297414A CN118817493B CN 118817493 B CN118817493 B CN 118817493B CN 202411297414 A CN202411297414 A CN 202411297414A CN 118817493 B CN118817493 B CN 118817493B
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 120
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 120
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 230000002457 bidirectional effect Effects 0.000 claims description 31
- 238000003825 pressing Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 22
- 238000005520 cutting process Methods 0.000 claims description 20
- 238000012546 transfer Methods 0.000 claims description 11
- 238000011056 performance test Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/16—Investigating or analyzing materials by the use of thermal means by investigating thermal coefficient of expansion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本发明涉及纤维及丝状类材料热膨胀性能测试领域，尤其是涉及高导热高模量碳纤维中高温热膨胀性能测试装置，包括工作台，工作台的一端设置有测试组件，工作台的另一端固定安装有顶板，且顶板靠近测试组件一端的底壁上固定安装有L形板，顶板远离测试组件的一端固定安装有支撑架，支撑架上设置有碳纤维丝盘和固定组件，顶板的下方设置有定位组件，定位组件位于支撑架和测试组件之间。工作人员可配合仪器辅助观察碳纤维丝试样是否符合测试标准，通过初步拉伸，可以及时发现并排除这些潜在损伤，确保测试结果的准确性，初步拉伸还可以帮助评估碳纤维丝在受力状态下的性能稳定性。
The present invention relates to the field of thermal expansion performance testing of fibers and filamentary materials, and in particular to a device for testing the medium and high temperature thermal expansion performance of high thermal conductivity and high modulus carbon fibers, comprising a workbench, a test assembly being arranged at one end of the workbench, a top plate being fixedly installed at the other end of the workbench, and an L-shaped plate being fixedly installed on the bottom wall of the top plate close to one end of the test assembly, a support frame being fixedly installed at one end of the top plate away from the test assembly, a carbon fiber wire disc and a fixed assembly being arranged on the support frame, a positioning assembly being arranged below the top plate, and the positioning assembly being located between the support frame and the test assembly. The staff can cooperate with the instrument to assist in observing whether the carbon fiber wire sample meets the test standard. Through preliminary stretching, these potential damages can be discovered and eliminated in time to ensure the accuracy of the test results. The preliminary stretching can also help evaluate the performance stability of the carbon fiber wire under stress.
Description
Technical Field
The invention relates to the field of thermal expansion performance test of fibers and filament materials, in particular to a device for testing the thermal expansion performance of high-heat-conductivity high-modulus carbon fibers.
Background
The heat conduction performance of the high heat conduction carbon fiber is obviously superior to that of the common carbon fiber, the heat conduction performance of the high heat conduction carbon fiber can reach 1.5-5 times of that of copper, and the high heat conduction carbon fiber can efficiently conduct and release heat. The characteristic makes it have wide application prospect in the fields needing high-efficiency heat management, such as spacecrafts, electronic equipment and the like. In spacecraft, high thermal conductivity carbon fiber composite materials are used in key parts such as heat management structures, heat protection systems, engine nozzles and the like to realize effective control and conduction of heat.
The invention discloses a Chinese patent application with publication number of CN110823944A, which discloses a high-temperature thermal expansion performance testing device in high-heat-conductivity high-modulus carbon fiber, comprising: the device comprises a fixed platform, a laser scanning displacement measuring instrument, a furnace shell lifting device, a furnace shell, a measuring main body, a heating furnace body, a measured sample piece and a constant temperature reference table; wherein, the furnace shell lifting device is arranged at the upper part of the fixed platform; the furnace shell lifting device is connected with the furnace shell, and can drive the furnace shell to move up and down; the laser scanning displacement measuring instrument, the furnace shell and the constant temperature reference table are all arranged on the upper part of the fixed platform; the laser scanning displacement measuring instrument, the furnace shell, the measuring main body, the heating furnace body, the measured sample piece and the constant temperature reference table are positioned in the furnace shell lifting device; the measuring main body is positioned in the furnace shell and is connected with the heating furnace body; the measured sample piece is connected with the measuring main body; the heating furnace body is sleeved on the outer surface of the tested sample piece. The invention realizes the accurate test of the axial linear expansion coefficient of the fiber material under the condition of medium and high temperature ranging from room temperature to 1000 ℃.
However, the above prior art has the following problems:
The carbon fiber yarn may be affected by various external forces during production, transportation or installation, so that internal micro-damage or structural change is caused, and the damage may have a significant influence on a test result when a high-precision thermal expansion performance test is performed, so that the carbon fiber yarn is required to be initially stretched before the high-precision thermal expansion performance test is performed, and whether the carbon fiber yarn meets a test standard is judged;
The existing high-heat-conductivity high-modulus carbon fiber wire has small diameter, the sampling mode and the cutting mode are time-consuming and labor-consuming, and the standard is difficult to unify.
Disclosure of Invention
The invention aims to solve the technical problems that: the invention provides a high-temperature thermal expansion performance testing device in high-heat-conductivity high-modulus carbon fiber, which aims to solve the problem that carbon fiber wires need to be preliminarily stretched before high-precision thermal expansion performance testing.
The invention provides a high-temperature thermal expansion performance testing device in high-heat-conductivity high-modulus carbon fibers, which comprises a workbench, wherein one end of the workbench is provided with a testing component, the other end of the workbench is fixedly provided with a top plate, the bottom wall of the top plate, which is close to one end of the testing component, is fixedly provided with an L-shaped plate, one end of the top plate, which is far away from the testing component, is fixedly provided with a support frame, the support frame is provided with a carbon fiber wire tray and a fixing component, a positioning component is arranged below the top plate and is positioned between the support frame and the testing component, the positioning component is used for limiting carbon fiber wires falling from the carbon fiber wire tray to one side of the workbench, the positioning component comprises a moving component, a roller component, a transmission component and a wire pressing component, the moving component is arranged below the top plate, the roller component is arranged below the carbon fiber wire tray, and the transmission component is arranged between the moving component and the roller component, and the L-shaped plate is provided with a cutting component, a first clamping component, a second clamping component, a counterweight component and a transferring component.
Preferably, one side of the support frame is rotatably connected with a first rotating shaft, the other side of the support frame is fixedly provided with a first motor, an output shaft of the first motor penetrates through the support frame and is fixedly connected with the first rotating shaft in a coaxial mode, the fixing component is used for fixing the carbon fiber wire disc on the first rotating shaft, a first opening is further formed in the top plate, and the first opening is located below the carbon fiber wire disc.
Preferably, the fixing component comprises a limiting disc and a fifth screw rod, the fifth screw rod is in threaded connection with the first rotating shaft, and the limiting disc is fixedly arranged at one end of the fifth screw rod.
Preferably, the moving component comprises a mounting plate, a third electric push rod, a push plate and a rack, wherein the mounting plate is fixedly arranged on one side of the top plate, the third electric push rod is fixedly arranged on the mounting plate, the output end of the third electric push rod faces to the inside of the top plate, the push plate is fixedly arranged on the output end of the third electric push rod, and the rack is fixedly arranged on one side of the push plate;
The roller component comprises a side shifting plate, the side shifting plate is transversely and slidably arranged at the lower end of the top plate, a compression roller is rotatably arranged at one end, close to the first opening, of the side shifting plate, a limit circular ring is fixedly arranged at one end, close to the side shifting plate, of the compression roller, a square column is fixedly arranged at one end of the side shifting plate, a square limit ring is slidably arranged on the square column, a first spring is sleeved on the square column, one side of the first spring is connected with the side shifting plate, and the other side of the first spring is connected with the square limit ring;
the driving component comprises a right angle plate, the right angle plate is slidably mounted at the lower end of the top plate along the width direction of the top plate, a second spring is arranged at one end of the upper portion of the right angle plate, a connecting block is slidably connected to the right angle plate along the length direction of the top plate, one side of the connecting block is slidably connected with a square column, one end of the right angle plate is provided with a first gear and a second gear, one side of the first gear is fixedly connected with a first screw rod, the first screw rod is rotatably connected with the right angle plate, the first screw rod is in threaded connection with the connecting block, one side of the second gear is fixedly connected with a second rotating shaft, the second rotating shaft is rotatably connected with the right angle plate, the first gear is meshed with the second gear, the second gear is meshed with a rack, the rack is slidably connected with one side of the right angle plate, one end of the right angle plate is fixedly provided with a U-shaped plate, the U-shaped plate is arranged on the outer side of the first gear and the second gear, one side of the right angle plate, which is far away from the side of the side plate is fixedly provided with an elastic telescopic rod, one end of the elastic telescopic rod is rotatably connected with a second rotating shaft, and the limit compression roller is in sliding fit with the limit compression roller;
The wire pressing component is arranged in the middle of the top plate and comprises a first air cylinder, a transmission rod and a wire pressing frame, the first air cylinder is fixedly arranged on the top plate, the output end of the first air cylinder is arranged downwards, the transmission rod is fixedly connected with the output end of the first air cylinder, the wire pressing frame is fixedly arranged at the lower end of the transmission rod, and a roll shaft is rotatably arranged in the wire pressing frame.
Preferably, the cutting assembly comprises a fixed plate, a second air cylinder and a cutting tool, wherein the fixed plate is fixedly arranged on one side of the L-shaped plate, the second air cylinder is fixedly arranged on the fixed plate, the output end of the second air cylinder is arranged downwards, and the cutting tool is fixedly connected with the output end of the second air cylinder;
The first clamping assembly comprises a locking plate, the locking plate is fixedly arranged at one end of the L-shaped plate and positioned below the cutting assembly, a second motor is fixedly arranged on the locking plate, a second bidirectional screw rod is coaxially and fixedly connected to an output shaft of the second motor, the second bidirectional screw rod is rotatably connected in the locking plate, two ends of the second bidirectional screw rod are respectively in threaded connection with a second clamping plate, and each second clamping plate is in sliding connection with the locking plate;
The second clamping assembly comprises a sliding plate and a second linear driver, the sliding plate is slidably connected to one end of the L-shaped plate and is positioned on one side of the locking plate, which is close to the testing assembly, the second linear driver is arranged on the L-shaped plate, the sliding plate is slidably matched with the L-shaped plate through the second linear driver, a third motor is fixedly arranged on the sliding plate, a third bidirectional screw is coaxially and fixedly connected to an output shaft of the third motor, the third bidirectional screw is rotatably connected to the sliding plate, two ends of the third bidirectional screw are respectively in threaded connection with a third clamping plate, and each third clamping plate is slidably connected with the sliding plate;
The L-shaped plate is also provided with a second opening, the opening direction of the second opening is parallel to the opening direction of the first opening, the counterweight assembly comprises two first linear drivers symmetrically arranged on the L-shaped plate along the axis in the length direction of the second opening, each first linear driver is provided with a second electric push rod, the output end of each second electric push rod faces the second opening, each output end of each second electric push rod is fixedly provided with a bearing concave plate, one bearing concave plate is provided with a positive pole magnetic block, and the other bearing concave plate is provided with a negative pole magnetic block;
The transfer assembly is arranged at one end of the top plate far away from the support frame and comprises a third cylinder and a connecting plate, wherein the third cylinder is fixedly arranged on the top plate, the output end of the third cylinder is downwards arranged, the connecting plate is fixedly connected with the output end of the third cylinder, a fourth motor is fixedly arranged on the connecting plate, a fourth bidirectional screw is coaxially and fixedly connected to the output shaft of the fourth motor, the fourth bidirectional screw is rotationally connected in the connecting plate, two ends of the fourth bidirectional screw are respectively connected with a fourth clamping plate in a threaded manner, each fourth clamping plate is in sliding connection with the connecting plate, the two fourth clamping plates are used for clamping the positive pole magnetic block and the negative pole magnetic block after magnetic connection, and the third cylinder is used for enabling the positive pole magnetic block and the negative pole magnetic block after magnetic connection to pass through the second opening and the testing assembly and move to the lower part of the workbench;
preferably, the ratio of the number of teeth of the second gear to the number of teeth of the first gear is greater than 1.
Preferably, the testing component comprises a furnace chamber and a laser measuring instrument, the furnace chamber is fixedly arranged on the workbench, the upper end and the lower end of the furnace chamber can allow the transfer component to pass through, the upper end and the lower end of the furnace chamber are in a sealing state when the thermal expansion performance test is carried out, and the laser measuring instrument is arranged beside the furnace chamber.
The invention has the beneficial effects that:
1. according to the invention, the carbon fiber on the carbon fiber tray to be tested can continuously fall and pass through the first opening and is subjected to preliminary stretching, a worker can cooperate with an instrument to assist in observing whether the carbon fiber sample meets the test standard, and through preliminary stretching, the potential damages can be found out and removed in time, the accuracy of a test result is ensured, and the preliminary stretching can also help to evaluate the performance stability of the carbon fiber in a stressed state;
2. parameters such as the stretching speed, the stretching force and the like can be adjusted by observing the performance of the carbon fiber in the stretching process, so that the testing process is ensured to be carried out within the bearing range of the carbon fiber, and a more accurate and reliable testing result is obtained;
3. The limiting sleeve on the elastic telescopic rod on one side of the side shifting plate is kept away from the right angle plate and can continuously slide towards the limiting circular ring until one end of the carbon fiber yarn is clamped at one corner below the first opening, limiting of the carbon fiber yarn in preliminary stretching is guaranteed, swing amplitude of the carbon fiber yarn in the horizontal direction in preliminary stretching is greatly reduced, the tension of each part of the carbon fiber yarn in preliminary stretching is guaranteed to be consistent, preliminary stretching effect of the carbon fiber yarn is improved, preliminary stretching work of the carbon fiber yarn on a whole roll of carbon fiber yarn disc can be completed only by pulling one end of the carbon fiber yarn through the second clamping assembly, and preliminary stretching work efficiency of the carbon fiber yarn is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of the whole of the present invention;
FIG. 2 is a schematic view of the working state of the positioning assembly of the present invention;
FIG. 3 is a schematic view of a fixing assembly according to the present invention;
FIG. 4 is a schematic view of the working states of the cutting assembly, the first clamping assembly and the second clamping assembly according to the present invention;
FIG. 5 is an enlarged view of FIG. 4 at A;
Fig. 6 is an overall view of a transfer set of the present invention.
Reference numerals: 1. a work table; 2. a top plate; 3. an L-shaped plate; 4. a support frame; 5. a carbon fiber wire tray; 6. a first rotating shaft; 7. a first motor; 11. a testing component; 12. a fixing assembly; 13. a positioning assembly; 14. a moving member; 15. a roller member; 16. a transmission member; 17. a wire pressing member; 18. a cutting assembly; 19. a first clamping assembly; 20. a second clamping assembly; 21. a counterweight assembly; 22. a transfer assembly; 111. a furnace chamber; 112. a laser measuring instrument; 121. a limiting disc; 122. a fifth screw; 141. a mounting plate; 142. a third electric push rod; 143. a push plate; 144. a rack; 151. a side shifting plate; 152. a press roller; 153. a limit circular ring; 154. square columns; 155. square limiting ring; 156. a first spring; 161. a right angle plate; 162. a second spring; 163. a connecting block; 164. a first gear; 165. a second gear; 166. a first screw; 167. a second rotating shaft; 168. a U-shaped plate; 169. an elastic telescopic rod; 160. a limit sleeve; 171. a first cylinder; 172. a transmission rod; 173. a wire pressing frame; 181. a fixing plate; 182. a second cylinder; 183. a cutting tool; 191. a locking plate; 192. a second motor; 193. a second bidirectional screw; 194. a second clamping plate; 201. a sliding plate; 202. a second linear driver; 203. a third motor; 204. a third bi-directional screw; 205. a third clamping plate; 211. a first linear driver; 212. a second electric push rod; 213. a bearing concave plate; 214. a positive pole magnetic block; 215. a negative pole magnetic block; 221. a third cylinder; 222. a connecting plate; 223. a fourth motor; 224. a fourth bi-directional screw; 225. and a fourth clamping plate.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown.
In this embodiment, as shown in fig. 1 to 6, the high-temperature thermal expansion performance testing device in high-thermal conductivity and high-modulus carbon fiber comprises a workbench 1, a testing component 11 is arranged at one end of the workbench 1, a top plate 2 is fixedly arranged at the other end of the workbench 1, an L-shaped plate 3 is fixedly arranged on the bottom wall of the top plate 2 close to one end of the testing component 11, a supporting frame 4 is fixedly arranged at one end of the top plate 2 far away from the testing component 11, a carbon fiber wire tray 5 and a fixing component 12 are arranged on the supporting frame 4, a positioning component 13 is arranged below the top plate 2, the positioning component 13 is positioned between the supporting frame 4 and the testing component 11, the positioning component 13 is used for limiting carbon fiber wires falling from the carbon fiber wire tray 5 to one side of the workbench 1, the positioning component 13 comprises a moving component 14, a roller component 15, a transmission component 16 and a wire pressing component 17, the moving component 14 is arranged below the top plate 2, the roller component 15 is arranged below the carbon fiber wire tray 5, the transmission component 16 is arranged between the moving component 14 and the roller component 15, and the L-shaped plate 3, a first weight component 21, a second weight clamping component 20 and a weight clamping component 20 are arranged on the L-shaped component and a second weight clamping component 20.
Before the high-heat-conductivity high-modulus carbon fiber is subjected to thermal expansion performance test by using the workbench 1, the carbon fiber wire disc 5 wound with the carbon fiber is sleeved on the first rotating shaft 6 of the support frame 4, so that the carbon fiber wire disc 5 rotates along with the first rotating shaft 6, carbon fiber wires on the carbon fiber wire disc 5 can continuously fall down and pass through the first opening and are initially stretched, a worker can assist in observing whether a carbon fiber wire sample meets the test standard or not by matching with an instrument, and through the initial stretching, the potential damages can be found and removed in time, the accuracy of a test result is ensured, and the initial stretching can also help evaluate the performance stability of the carbon fiber wire in a stressed state. By observing the performance of the carbon fiber in the drawing process, parameters such as drawing speed, drawing force and the like can be adjusted so as to ensure that the testing process is carried out within the bearing range of the carbon fiber, thereby obtaining more accurate and reliable testing results.
Specifically, one side of support frame 4 rotates and is connected with first pivot 6, the opposite side fixed mounting of support frame 4 has first motor 7, the output shaft of first motor 7 runs through support frame 4 and with first pivot 6 coaxial fixed connection, fixed subassembly 12 is used for fixing carbon fiber dish 5 on first pivot 6, still seted up first opening on roof 2, first opening is located the below of carbon fiber dish 5.
Specifically, the fixing assembly 12 includes a limiting disc 121 and a fifth screw 122, the fifth screw 122 is in threaded connection with the first rotating shaft 6, and the limiting disc 121 is fixedly installed at one end of the fifth screw 122.
Specifically, the moving component 14 includes a mounting plate 141, a third electric push rod 142, a push plate 143, and a rack 144, where the mounting plate 141 is fixedly installed on one side of the top plate 2, the third electric push rod 142 is fixedly installed on the mounting plate 141, and an output end of the third electric push rod 142 is disposed toward the inside of the top plate 2, the push plate 143 is fixedly installed on an output end of the third electric push rod 142, and the rack 144 is fixedly installed on one side of the push plate 143;
the roller component 15 comprises a side shifting plate 151, the side shifting plate 151 is transversely and slidably arranged at the lower end of the top plate 2, a pressing roller 152 is rotatably arranged at one end, close to the first opening, of the side shifting plate 151, a limiting circular ring 153 is fixedly arranged at one end, close to the side shifting plate 151, of the pressing roller 152, a square column 154 is fixedly arranged at one end of the side shifting plate 151, a square limiting ring 155 is slidably arranged on the square column 154, a first spring 156 is sleeved on the square column 154, one side of the first spring 156 is connected with the side shifting plate 151, and the other side of the first spring 156 is connected with the square limiting ring 155;
the transmission part 16 comprises a right angle plate 161, the right angle plate 161 is slidably mounted at the lower end of the top plate 2 along the width direction of the top plate 2, one end of the upper part of the right angle plate 161 is provided with a second spring 162, the right angle plate 161 is slidably connected with a connecting block 163 along the length direction of the top plate 2, one side of the connecting block 163 is slidably connected with a square column 154, one end of the right angle plate 161 is provided with a first gear 164 and a second gear 165, one side of the first gear 164 is coaxially and fixedly connected with a first screw 166, the first screw 166 is rotatably connected with the right angle plate 161, the first screw 166 is in threaded connection with the connecting block 163, one side of the second gear 165 is coaxially and fixedly connected with a second rotating shaft 167, the second rotating shaft 167 is rotatably connected with the right angle plate 161, the first gear 164 is meshed with the second gear 165, the second gear 165 is meshed with a rack 144, one side of the rack 144 is slidably connected with the right angle plate 161, one end of the right angle plate 161 is fixedly provided with a U168, the U168 is coaxially and fixedly connected with one side of the first gear 164 and the right angle plate 164, one side of the first gear 164 is fixedly connected with the second screw shaft 163, one side of the elastic side sleeve 169 is in a telescopic manner, and is movably connected with the telescopic sleeve 169, and is arranged at one side of the telescopic sleeve 160;
The limiting sleeve 160 on the elastic telescopic rod 169 on the side of the right angle plate 161, which is far away from the side shifting plate 151, can continuously slide towards the limiting ring 153 until one end of the carbon fiber yarn is clamped at one corner below the first opening, so that the carbon fiber yarn is ensured to be limited in the preliminary stretching process, the swing amplitude of the carbon fiber yarn in the horizontal direction is greatly reduced in the preliminary stretching process, the tension of each part of the carbon fiber yarn is ensured to be consistent in the preliminary stretching process, the preliminary stretching effect of the carbon fiber yarn is improved, the preliminary stretching work of the carbon fiber yarn on the whole roll of carbon fiber yarn disc 5 can be completed only by pulling one end of the carbon fiber yarn through the second clamping assembly 20, and the preliminary stretching work efficiency of the carbon fiber yarn is improved. The elastic telescopic rod 169 can ensure that the limit sleeve 160 is always sleeved on the press roller 152 to match the displacement of the side shifting plate 151.
The wire pressing component 17 is arranged in the middle of the top plate 2, the wire pressing component 17 comprises a first air cylinder 171, a transmission rod 172 and a wire pressing frame 173, the first air cylinder 171 is fixedly arranged on the top plate 2, the output end of the first air cylinder 171 is arranged downwards, the transmission rod 172 is fixedly connected with the output end of the first air cylinder 171, the wire pressing frame 173 is fixedly arranged at the lower end of the transmission rod 172, and a roll shaft is rotatably arranged in the wire pressing frame 173;
Specifically, the cutting assembly 18 includes a fixing plate 181, a second air cylinder 182 and a cutting tool 183, the fixing plate 181 is fixedly installed on one side of the L-shaped plate 3, the second air cylinder 182 is fixedly installed on the fixing plate 181, the output end of the second air cylinder 182 is downward, and the cutting tool 183 is fixedly connected with the output end of the second air cylinder 182;
The first clamping assembly 19 comprises a locking plate 191, the locking plate 191 is fixedly arranged at one end of the L-shaped plate 3 and is positioned below the cutting assembly 18, a second motor 192 is fixedly arranged on the locking plate 191, a second bidirectional screw 193 is coaxially and fixedly connected to an output shaft of the second motor 192, the second bidirectional screw 193 is rotatably connected in the locking plate 191, two ends of the second bidirectional screw 193 are respectively in threaded connection with a second clamping plate 194, and each second clamping plate 194 is in sliding connection with the locking plate 191;
The second clamping assembly 20 comprises a sliding plate 201 and a second linear driver 202, the sliding plate 201 is slidably connected to one end of the L-shaped plate 3 and is positioned at one side of the locking plate 191 close to the testing assembly 11, the second linear driver 202 is mounted on the L-shaped plate 3, the sliding plate 201 is slidably matched with the L-shaped plate 3 through the second linear driver 202, a third motor 203 is fixedly mounted on the sliding plate 201, a third bidirectional screw 204 is coaxially and fixedly connected to an output shaft of the third motor 203, the third bidirectional screw 204 is rotatably connected in the sliding plate 201, two ends of the third bidirectional screw 204 are respectively in threaded connection with a third clamping plate 205, and each third clamping plate 205 is slidably connected with the sliding plate 201;
The L-shaped plate 3 is further provided with a second opening, the opening direction of the second opening is parallel to the opening direction of the first opening, the counterweight assembly 21 comprises two first linear drivers 211 symmetrically arranged on the L-shaped plate 3 along the axis in the length direction of the second opening, each first linear driver 211 is provided with a second electric push rod 212, the output end of each second electric push rod 212 is arranged towards the second opening, each output end of each second electric push rod 212 is fixedly provided with a bearing concave plate 213, one bearing concave plate 213 is provided with an anode magnetic block 214, and the other bearing concave plate 213 is provided with a cathode magnetic block 215;
The transfer assembly 22 is arranged at one end of the top plate 2 far away from the supporting frame 4, the transfer assembly 22 comprises a third air cylinder 221 and a connecting plate 222, the third air cylinder 221 is fixedly arranged on the top plate 2, the output end of the third air cylinder 221 is downwards arranged, the connecting plate 222 is fixedly connected with the output end of the third air cylinder 221, a fourth motor 223 is fixedly arranged on the connecting plate 222, a fourth bidirectional screw 224 is fixedly connected on the output shaft of the fourth motor 223 coaxially, the fourth bidirectional screw 224 is rotationally connected in the connecting plate 222, two ends of the fourth bidirectional screw 224 are respectively connected with a fourth clamping plate 225 in a threaded manner, each fourth clamping plate 225 is in sliding connection with the connecting plate 222, the two fourth clamping plates 225 are used for clamping the positive magnetic block 214 and the negative magnetic block 215 after magnetic connection, and the third air cylinder 221 is used for enabling the positive magnetic block 214 and the negative magnetic block 215 after magnetic connection to pass through the second opening and the testing assembly 11 and move to the lower part of the workbench 1;
specifically, the gear ratio of the second gear 165 and the first gear 164 is greater than 1.
Specifically, the testing assembly 11 includes a furnace chamber 111 and a laser measuring instrument 112, the furnace chamber 111 is fixedly mounted on the workbench 1, the upper and lower ends of the furnace chamber 111 can both allow the transfer assembly 22 to pass through, the upper and lower ends of the furnace chamber 111 are in a sealing state when the thermal expansion performance test is performed, and the laser measuring instrument 112 is arranged at the side of the furnace chamber 111.
The working principle is as follows: before the high-thermal-conductivity high-modulus carbon fiber is subjected to thermal expansion performance test by using the workbench 1, the carbon fiber wire disc 5 wound with the carbon fiber is sleeved on the first rotating shaft 6 of the supporting frame 4, then the limiting disc 121 on the fixing component 12 is rotated, the carbon fiber wire disc 5 is clamped on the limiting disc 121 through the threaded connection of the fifth screw 122 and the first rotating shaft 6, at the moment, one end of the carbon fiber wire on the carbon fiber wire disc 5 can be clamped on the second clamping component 20 through the mechanical arm through the positioning component 13, then the first motor 7 is started, the output end of the first motor 7 drives the first rotating shaft 6 to rotate, at the moment, the carbon fiber wire disc 5 is clamped on the limiting disc 121, so that the carbon fiber wire disc 5 rotates along with the first rotating shaft 6, therefore, a worker can cooperate with an instrument to assist in observing whether a carbon fiber wire sample meets the test standard or not, through preliminary stretching, potential damages can be found out and eliminated in time, the performance of the carbon fiber can be evaluated under the preliminary stretching state, and the performance of the carbon fiber can be evaluated. By observing the performance of the carbon fiber in the drawing process, parameters such as drawing speed, drawing force and the like can be adjusted so as to ensure that the testing process is carried out within the bearing range of the carbon fiber, thereby obtaining more accurate and reliable testing results.
Then, the moving member 14 on the top plate 2 is started, the third electric push rod 142 on the mounting plate 141 drives the push plate 143 to longitudinally move, at this time, the rack 144 on the push plate 143 is meshed with the second gear 165 on the right-angle plate 161 in the transmission member 16, so that the second gear 165 rotates, and the first gear 164 is driven to rotate by the second gear 165, the first screw 166 on the first gear 164 rotates along with the second gear, and drives the connecting block 163 to transversely slide on the L-shaped plate 3 to approach the first opening, and one side of the connecting block 163 is slidingly connected with the square column 154 on the roller member 15, so that the connecting block 163 can drive the side-shift plate 151 to transversely slide together through the square column 154 until the pressing roller 152 on the side-shift plate 151 moves to the most distal end and contacts the thread end of the carbon fiber yarn.
The gear ratio of the second gear 165 to the first gear 164 is greater than 1, so that the first gear 164 can have a faster rotation speed when the second rotating shaft 167 rotates, the movement speed of the connecting block 163 is accelerated, and the working efficiency is improved.
When the connecting block 163 moves to the most distal end, the push plate 143 on the moving part 14 also abuts against the U-shaped plate 168 on the rectangular plate 161, at this time, the second gear 165 and the first gear 164 are not rotated any more, the whole rectangular plate 161 is pushed to the side-shifting plate 151 by the push plate 143 to compress the second spring 162, the square column 154 is further inserted into the connecting block 163, thereby compressing the first spring 156 through the square limiting ring 155, the limiting sleeve 160 on the elastic telescopic rod 169 on the side of the rectangular plate 161 far away from the side-shifting plate 151 can continuously slide towards the limiting ring 153 until one end of the carbon fiber wire is clamped at one corner below the first opening, limiting the carbon fiber wire in preliminary stretching is ensured, the swing amplitude of the carbon fiber wire in the horizontal direction in preliminary stretching is greatly reduced, the tensioning degree of each part of the carbon fiber wire in preliminary stretching is ensured to be consistent, the preliminary stretching effect of the carbon fiber wire is improved, and the preliminary stretching work of the carbon fiber wire on the whole carbon fiber wire disc 5 can be completed by only pulling one end of the carbon fiber wire through the second clamping component 20, and the preliminary stretching work efficiency of the carbon fiber wire is improved. The elastic telescopic rod 169 can ensure that the limit sleeve 160 is always sleeved on the press roller 152 to match the displacement of the side shifting plate 151.
After the preliminary drawing is completed, the carbon fiber yarn disc 5 after the preliminary drawing can be quickly taken down by reversely rotating the limiting disc 121 on the fixing assembly 12, so that the method is convenient and quick.
And the heights of the transmission rod 172 and the wire pressing frame 173 on the wire pressing component 17 can be adjusted through the first cylinder 171, so that the tensioning pressure of the carbon fiber wires during preliminary stretching can be quickly adjusted, and the practicability of the device is further improved.
The second clamping assembly 20 can drive the third bidirectional screw 204 to rotate through the third motor 203 on the sliding plate 201, so as to drive the two third clamping plates 205 to move, clamp the carbon fiber filaments, and drive the sliding plate 201 to move to the other end of the L-shaped plate 3 through the second linear driver 202, the second linear driver 202 can be a screw rod sliding table, which is not described in detail herein, after the second clamping assembly 20 moves one end of the carbon fiber filaments to the other end of the L-shaped plate 3, the first clamping assembly 19 is started, and the second bidirectional screw 193 is driven to rotate through the second motor 192 on the locking plate 191, so as to drive the two second clamping plates 194 to move, and clamp the other end of the carbon fiber filaments.
After both ends of the carbon fiber wire are clamped, the counterweight assembly 21 is started, the output ends of the two second electric push rods 212 move towards the second opening to drive the two bearing concave plates 213 to be close to each other, at this time, the positive magnetic blocks 214 and the negative magnetic blocks 215 are mutually attracted and firmly adsorbed together, downward stretching force is provided for the carbon fiber wire, and the carbon fiber wire is assisted in subsequent thermal expansion performance test. The positive pole magnet 214 and the negative pole magnet 215 are used for providing downward stretching force for the carbon fiber, and the stretching force applied to the carbon fiber can be controlled very accurately by adjusting the magnetic force between the positive pole magnet 214 and the negative pole magnet 215, so that uniform and stable transmission of force is realized. The control mode is more accurate than that of the hanging hammer, and errors caused by uneven gravity effect are reduced. And when the medium-high temperature thermal expansion performance test is performed, the magnetic block system has better high temperature resistance compared with the lifting hammer, and can work in a high temperature environment more stably.
Then, the cutting assembly 18 is started, the output end of the second air cylinder 182 on the fixing plate 181 moves downwards, the cutting tool 183 is driven to move downwards, the carbon fiber wires are cut, one end of the carbon fiber wires is released, the positive pole magnetic block 214 and the negative pole magnetic block 215 can be driven to fix the carbon fiber wires at the moment, then the first linear driver 211 is started, the second electric push rod 212 supporting the positive pole magnetic block 214 and the negative pole magnetic block 215 is driven to move downwards towards the lower part of the transferring assembly 22, after the transferring assembly 22 is moved in place, the transferring assembly 22 is started, the third air cylinder 221 is gradually stretched downwards, the fourth motor 223 on the connecting plate 222 is started, the fourth motor 223 drives the fourth bidirectional screw 224 to rotate, thereby driving the two fourth clamping plates 225 to move, the positive pole magnetic block 214 and the negative pole magnetic block 215 are clamped, after the positive pole magnetic block 214 and the negative pole magnetic block 215 are clamped, the second electric push rod 212 can be driven to shrink, the transferring assembly 22 is prevented from moving downwards, then the carbon fiber wires are driven to move downwards, the upper end and lower end of the furnace chamber 111 can allow the transferring assembly 22 to pass through the positive pole magnetic block 214 and the negative pole magnetic block 215, the two ends of the carbon fiber wires can be tested to be in an accurate thermal expansion state, and the two ends of the carbon fiber can be tested by testing the thermal expansion assembly 112, and the thermal expansion state can be tested when the thermal expansion state of the measuring device is tested. In order to better match the downward movement of the carbon fiber filament, a rolling shaft may be disposed at the end of the second opening away from the first clamping assembly 19, so that the downward movement of the carbon fiber filament is smoother while the end of the carbon fiber filament is still clamped by the second clamping assembly 20.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (4)
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| CN110823944A (en) * | 2019-10-18 | 2020-02-21 | 航天材料及工艺研究所 | High-temperature thermal expansion performance testing device in high-heat-conduction high-modulus carbon fiber |
| CN112903922A (en) * | 2021-01-27 | 2021-06-04 | 闽江学院 | Automatic detection and testing device for production of modacrylic absorbent fibers |
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| US5188456A (en) * | 1991-11-29 | 1993-02-23 | Hoechst Celanese Corporation | Apparatus for thermomechanical testing of fibers |
| CN218297741U (en) * | 2022-07-29 | 2023-01-13 | 大连理工大学洛阳研究院 | Carbon fiber stretch yarn tensile test system appearance device |
| CN118566004B (en) * | 2024-06-18 | 2024-11-22 | 常州市华纺纺织仪器有限公司 | Fiber fineness strong stretching tester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110823944A (en) * | 2019-10-18 | 2020-02-21 | 航天材料及工艺研究所 | High-temperature thermal expansion performance testing device in high-heat-conduction high-modulus carbon fiber |
| CN112903922A (en) * | 2021-01-27 | 2021-06-04 | 闽江学院 | Automatic detection and testing device for production of modacrylic absorbent fibers |
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