Automatic sample preparation device and method for testing tensile property of carbon fiber multifilament

Abstract

The invention discloses an automatic sample preparation device and method for testing the tensile property of a carbon fiber multifilament, and relates to the field of sample preparation of the carbon fiber multifilament, the automatic sample preparation device comprises a device body, the left side of the device body is provided with a first fixing frame, the outer wall of the first fixing frame is rotatably connected with a discharging shaft and an adjusting roller, and the right side of the adjusting roller is provided with a lifting wheel; a constant temperature instrument is installed on the outer wall of the second fixing frame, a glue dipping wheel is rotationally connected to the top of an inner cavity of the constant temperature instrument, a lifting assembly is movably connected to the bottom of the inner cavity of the constant temperature instrument, a glue scraping assembly is installed on the right side of the second fixing frame, and a heating furnace is arranged on the right side of the glue scraping assembly; a cutting assembly is arranged on the right side of the heating furnace. According to the automatic sample preparation device and method for testing the tensile property of the carbon fiber multifilament, full-process automatic control is achieved, carbon fibers can be evenly glued, the sample size is stable and controllable, and meanwhile the sample preparation efficiency can be effectively improved.

Description

Technical Field

[0001] The invention relates to the field of sample preparation of carbon fiber multifilaments, and in particular to an automatic sample preparation device and method for testing the tensile properties of carbon fiber multifilaments. Background Art

[0002] Carbon fiber is widely used in aerospace, automobile manufacturing, sports equipment and other fields due to its excellent properties such as high strength, high modulus, high temperature resistance, corrosion resistance, low density, good electrical and thermal conductivity, fatigue resistance and thermal stability. In particular, high-performance carbon fiber, with its unique physical and chemical properties, plays a vital role in modern industry and technology.

[0003] The grade and performance of carbon fiber are mainly characterized by its tensile properties. The main indicators include tensile strength, tensile modulus and elongation at break. The national standard GB / T3362 clearly proposes a test method for the tensile properties of carbon fiber. The sample preparation method introduced in the standard is to use manual dipping, cut a certain length of carbon fiber multifilament, put it into epoxy resin glue and soak it for 2min-4min, remove excess glue from the multifilament dipped in glue, fix it on a wire rack, straighten the multifilament and tighten it on the frame, and dry it at room temperature. Chinese patent CN105806638 introduces a dipping device and method for testing the tensile properties of carbon fiber multifilament. The dipping device uses a fully enclosed test box for dipping, which can control the amount and uniformity of glue and reduce the volatility of glue. However, the fiber cutting and subsequent drying and curing process still require manual operation, which cannot effectively improve the overall efficiency of sample preparation, and the shape and size of the obtained sample cannot be finely controlled.

[0004] Therefore, it is necessary to propose an automatic sample preparation device and method for testing the tensile properties of carbon fiber multifilaments to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide an automatic sample preparation device and method for testing the tensile properties of carbon fiber multifilaments, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An automatic sample preparation device for testing tensile properties of carbon fiber multifilaments, comprising a device body, a first fixed frame is installed on the left side of the device body, a discharge shaft and an adjusting roller are rotatably connected to the outer wall of the first fixed frame, a lifting wheel is arranged on the right side of the adjusting roller, a second fixed frame is installed on the left side of the top of the device body, the outer wall of the second fixed frame is rotatably connected to a guide wheel, and a retaining wheel and a tension wheel are arranged on the outer wall of the second fixed frame;

[0008] The outer wall of the second fixed frame is installed with a thermostat, the top of the inner cavity of the thermostat is rotatably connected with a dipping wheel, and the bottom of the inner cavity of the thermostat is movably connected with a lifting component;

[0009] A scraper assembly is installed on the right side of the second fixing frame, a heating furnace is arranged on the right side of the scraper assembly, and a cutting assembly is arranged on the right side of the heating furnace.

[0010] Preferably, there are three lifting wheels, an outer wall of the first fixing frame is provided with an adjusting groove, one end of the lifting wheel is movably connected in the inner cavity of the adjusting groove, a side edge of the first fixing frame is threadedly connected with a positioning bolt, and the positioning bolt extends into the inner cavity of the adjusting groove and fits against the side edge of the outer wall of the lifting wheel.

[0011] Preferably, there are two guide wheels, which are symmetrically rotatably connected to both sides of the tension wheel, a connecting seat is movably connected in the inner cavity on the left side of the outer wall of the second fixed frame, a first linear motor is installed on the outer wall of the second fixed frame, and both sides of the connecting seat are installed at the first linear motor.

[0012] Preferably, movable grooves are symmetrically opened on both sides of the outer wall of the second fixing frame, and adjustment components are arranged on both sides of the inner cavity of the movable grooves, the two adjustment components on the opposite sides are installed in the inner cavities of the two movable grooves, and the two adjustment components on the opposite sides are movably connected in the inner cavities of the two movable grooves.

[0013] Preferably, there are four retaining wheels, which are respectively mounted on the outer walls of the four adjusting components, and hydraulic push rods are symmetrically mounted on the tops of the adjusting components on both sides, and the hydraulic push rods are mounted in the inner cavity of the second fixing frame.

[0014] Preferably, a driving assembly is installed on the outer wall of the second fixed frame, a servo motor is installed on the right side of the driving assembly away from one end of the second fixed frame, a belt is installed in the inner cavity of the driving assembly, pulleys are installed at both ends of the belt inner cavity, the servo motor is installed on the outer wall of the pulley on the right side through a first rotating shaft, and the two pulleys are symmetrically installed on the outer walls of the retaining wheel on two opposite sides.

[0015] Preferably, lifting grooves are symmetrically provided on both sides of the thermostat, a rotating motor is installed at the bottom of the right side of the thermostat, a screw is installed on the top of the rotating motor through a second rotating shaft, the screw is rotatably connected in the inner cavity of the lifting groove, a guide rod is installed in the inner cavity of the lifting groove on the left side, connecting rods are symmetrically installed on the top of both sides of the lifting assembly, the connecting rods are movably connected to the sides of the thermostat, the bottom of the side of the connecting rod is movably connected to the inner cavity of the lifting groove, the bottom of the right side of the connecting rod is threadedly connected to the outer wall of the screw rod, and the bottom of the left side of the connecting rod is sleeved on the outer wall of the guide rod.

[0016] Preferably, a filter is installed at the bottom of the inner cavity of the scraper assembly, a waste glue collection box is installed at the bottom of the scraper assembly, an exhaust fan is installed at the bottom of the waste glue collection box, the waste glue collection box is communicated with the inner cavity of the scraper assembly, scrapers are symmetrically and movably connected on both sides of the inner cavity of the scraper assembly, the top of the inner cavity of the scraper assembly is rotatably connected to a two-way screw rod, the outer wall of the scraper assembly is rotatably connected to a rotating handle, the rotating handle is installed on the outer wall of the two-way screw rod, the top of the scraper is threadedly connected to the outer wall of the two-way screw rod, a conveying rack is installed on the right side of the scraper assembly, and a conveying wheel is rotatably connected to the inner cavity at the top of the conveying rack.

[0017] Preferably, the heating furnace and the cutting assembly are both installed on the top of the device body, a second linear motor is installed on the top of the cutting assembly, a mounting frame is installed on the bottom of the second linear motor, a cutting knife is installed on the bottom of the mounting frame, a hydraulic lifting rod is installed on the top of the cutting knife, and the hydraulic lifting rod is installed on the top of the mounting frame.

[0018] An automatic sample preparation method for testing the tensile properties of carbon fiber multifilaments is applied to the above-mentioned automatic sample preparation device for testing the tensile properties of carbon fiber multifilaments, and comprises the following operating steps:

[0019] S1: Adjust the room environment where the device is located to 25℃±2℃ and relative humidity to 50%±10%, and place the carbon fiber multifilament in this environment for more than 2 hours;

[0020] S2: removing the carbon fiber multifilaments on the surface of the carbon fiber multifilaments after the static state, pulling out the carbon fiber multifilaments and placing them on the transmission shaft, and passing them through the adjusting roller, lifting wheel, guide wheel, tension wheel, adjusting component, dipping wheel, inner cavity of the scraping component, heating furnace, and placing them at the cutting component through the positioning frame;

[0021] S3: The heights of the three lifting wheels are adjusted according to the use requirements, so that they can move in the inner cavity of the adjustment slot. After moving to a suitable position, they are limited by the positioning bolts, and the first linear motor is started to adjust the height of the tension wheel until it is adjusted to a suitable position. The servo motor is started to drive the belt and the pulley, thereby driving the two retaining wheels on the opposite side to rotate, and the carbon fiber multifilament can be fed at this time;

[0022] S4: Start the thermostat for preheating, pour the resin into the inner cavity of the thermostat, start the rotary motor, drive the screw to rotate, so that the connecting rod on the right can drive the lifting assembly to adjust the height until the resin in the inner cavity of the thermostat can immerse the carbon fiber multifilaments, and perform glue dispensing on the carbon fiber multifilaments immersed in the resin;

[0023] S5: After the dispensing is completed, the carbon fiber multifilament enters the inner cavity of the scraping assembly, and the rotating handle is rotated to drive the bidirectional screw rod to rotate, so that the top of the scraper can be threadedly connected with it, so as to adjust the distance between the two scrapers according to the size and required shape of the carbon fiber multifilament, wherein the shape includes but is not limited to round, square and triangular. After the adjustment is completed, the carbon fiber multifilament is conveyed, and the scraper can perform glue scraping on the carbon fiber multifilament;

[0024] S6: putting the carbon fiber multifilament after the coating into the inner cavity of the heating furnace, and heating it at 80° C. for 2 hours to cure it;

[0025] S7: After the carbon fiber multifilament is moved to a suitable position according to the size of the required sample, the second linear motor and the hydraulic lifting rod are started to adjust the position of the cutting knife to cut the carbon fiber multifilament. At this time, the sample preparation is completed.

[0026] Compared with the prior art, the present invention provides an automatic sample preparation device and method for testing the tensile properties of carbon fiber multifilaments, which has the following beneficial effects:

[0027] 1. The automatic sample preparation device and method for testing the tensile properties of carbon fiber multifilaments are fully automated and controlled, which can make the carbon fiber gluing uniform, the sample size stable and controllable, and effectively improve the sample preparation efficiency. At the same time, the sample preparation method is simple, the operator is easy to learn and understand, the equipment structure is simple, the production cost is low, and the sample is in a closed environment during preparation, which can effectively protect the operator's health.

[0028] 2. The automatic sample preparation device and method for testing the tensile properties of carbon fiber multifilaments can adjust the tension of the carbon fiber multifilaments according to usage requirements through the guide wheel, tension wheel and retaining wheel with adjustable positions, thereby effectively improving its conveying efficiency and further improving the overall sample preparation speed.

[0029] 3. The automatic sample preparation device and method for testing the tensile properties of carbon fiber multifilaments can automatically lift the resin in the inner cavity of the thermostat through a height-adjustable lifting component to facilitate its immersion in the carbon fiber multifilaments. The scraper provided can be used to scrape the glue on the carbon fiber multifilaments while they are being conveyed, so as to facilitate subsequent curing treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 The present invention Figure 1 The enlarged view of point A in the middle;

[0032] Figure 3 It is a schematic structural diagram of the retaining wheel of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the lifting assembly of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the scraper assembly of the present invention.

[0035] In the figure: 1, device body; 2, first fixed frame; 3, unloading shaft; 4, adjusting roller; 5, adjusting slot; 6, lifting wheel; 7, positioning bolt; 8, adjusting block; 9, guide wheel; 10, first linear motor; 11, tension wheel; 12, connecting seat; 13, movable slot; 14, adjusting assembly; 15, holding wheel; 16, hydraulic push rod; 17, driving assembly; 18, servo motor; 19, belt; 20, pulley; 21, second fixed frame; 2 2. Glue dipping wheel; 23. Thermostat; 24. Lifting slot; 25. Rotating motor; 26. Lifting assembly; 27. Connecting rod; 28. Screw rod; 29. ​​Guide rod; 30. Glue scraping assembly; 31. Waste glue collecting box; 32. Exhaust fan; 33. Turning handle; 34. Scraper; 35. Bidirectional screw rod; 36. Conveying rack; 37. Conveying wheel; 38. Heating furnace; 39. Cutting assembly; 40. Second linear motor; 41. Hydraulic lifting rod; 42. Cutting knife. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] Embodiment 1:

[0038] like Figure 1-Figure 3As shown, an automatic sample preparation device for testing the tensile properties of carbon fiber multifilaments comprises a device body 1, a first fixed frame 2 is installed on the left side of the device body 1, the outer wall of the first fixed frame 2 is rotatably connected with a discharge shaft 3 and an adjusting roller 4, a lifting wheel 6 is arranged on the right side of the adjusting roller 4, a second fixed frame 21 is installed on the left side of the top of the device body 1, the outer wall of the second fixed frame 21 is rotatably connected with a guide wheel 9, the outer wall of the second fixed frame 21 is provided with a retaining wheel 15 and an elastic wheel 11, there are three lifting wheels 6, an adjusting groove 5 is opened on the outer wall of the first fixed frame 2, one end of the lifting wheel 6 is movably connected to the inner cavity of the adjusting groove 5, a positioning bolt 7 is threadedly connected to the side of the first fixed frame 2, the positioning bolt 7 extends into the inner cavity of the adjusting groove 5 and fits on the side of the outer wall of the lifting wheel 6, there are two guide wheels 9, the two guide wheels 9 are symmetrically rotatably connected to the two sides of the elastic wheel 11, a connecting seat 12 is movably connected in the inner cavity on the left side of the outer wall of the second fixed frame 21, a first linear motor 10 is installed on the outer wall of the second fixed frame 21, and the connecting seat 12 The two sides are installed at the first linear motor 10, and the two sides of the outer wall of the second fixed frame 21 are symmetrically provided with movable grooves 13, and the two sides of the inner cavity of the movable groove 13 are provided with adjustment components 14, and the two adjustment components 14 on the opposite side are installed in the inner cavity of the two movable grooves 13, and the two adjustment components 14 on the opposite side are movably connected in the inner cavity of the two movable grooves 13. There are four retaining wheels 15, and the four retaining wheels 15 are respectively installed on the outer walls of the four adjusting components 14, and hydraulic push rods 16 are symmetrically installed on the tops of the adjusting components 14 on both sides. The hydraulic push rods 16 are installed in the inner cavity of the second fixed frame 21, and the outer wall of the second fixed frame 21 is installed with a driving component 17, and a servo motor 18 is installed on the right side of the driving component 17 away from the end of the second fixed frame 21, and a belt 19 is installed in the inner cavity of the driving component 17, and pulleys 20 are installed at both ends of the inner cavity of the belt 19, and the servo motor 18 is installed on the outer wall of the right pulley 20 through the first rotating shaft, and the two pulleys 20 are symmetrically installed on the outer walls of the holding wheels 15 on the two opposite sides;

[0039] The carbon fiber can be glued evenly, the sample size can be stable and controllable, and the sample preparation efficiency can be effectively improved. At the same time, the sample preparation method is simple, the operator can learn and understand it easily, the equipment structure is simple, the production cost is low, and the sample is in a closed environment during sample preparation, which can effectively protect the operator's health. Through the guide wheel 9, the tension wheel 11 and the retaining wheel 15 with adjustable positions, the tension of the carbon fiber multifilament can be adjusted according to the use requirements, so as to effectively improve its conveying efficiency and further improve the overall sample preparation speed.

[0040] Embodiment 2:

[0041] like Figure 1 , Figure 4 , Figure 5As shown, an automatic sample preparation device for testing the tensile properties of carbon fiber multifilaments, a thermostat 23 is installed on the outer wall of the second fixed frame 21, a dipping wheel 22 is rotatably connected to the top of the inner cavity of the thermostat 23, a lifting assembly 26 is movably connected to the bottom of the inner cavity of the thermostat 23, lifting grooves 24 are symmetrically provided on both sides of the thermostat 23, a rotating motor 25 is installed at the bottom of the right side of the thermostat 23, a screw rod 28 is installed on the top of the rotating motor 25 through a second rotating shaft, the screw rod 28 is rotatably connected to the inner cavity of the lifting groove 24, a guide rod 29 is installed in the inner cavity of the left lifting groove 24, connecting rods 27 are symmetrically installed on the top of both sides of the lifting assembly 26, the connecting rods 27 are movably connected to the side of the thermostat 23, the bottom of the side of the connecting rod 27 is movably connected to the inner cavity of the lifting groove 24, and the side of the right connecting rod 27 is movably connected to the inner cavity of the lifting groove 24. The bottom of the side is threadedly connected to the outer wall of the screw rod 28, the bottom of the side of the left connecting rod 27 is sleeved on the outer wall of the guide rod 29, a filter is installed at the bottom of the inner cavity of the scraper assembly 30, a waste glue collection box 31 is installed at the bottom of the scraper assembly 30, an exhaust fan 32 is installed at the bottom of the waste glue collection box 31, the waste glue collection box 31 is communicated with the inner cavity of the scraper assembly 30, scrapers 34 are symmetrically and movably connected on both sides of the inner cavity of the scraper assembly 30, a bidirectional screw rod 35 is rotatably connected to the top of the inner cavity of the scraper assembly 30, a rotating handle 33 is rotatably connected to the outer wall of the scraper assembly 30, the rotating handle 33 is installed on the outer wall of the bidirectional screw rod 35, the top of the scraper 34 is threadedly connected to the outer wall of the bidirectional screw rod 35, a conveying frame 36 is installed on the right side of the scraper assembly 30, and a conveying wheel 37 is rotatably connected in the inner cavity at the top of the conveying frame 36;

[0042] The resin in the inner cavity of the thermostat 23 can be automatically lifted by the height-adjustable lifting assembly 26 to facilitate its immersion in the carbon fiber multifilaments. The scraper 34 can be used to scrape the carbon fiber multifilaments while they are being transported, so as to facilitate subsequent curing treatment.

[0043] Embodiment three:

[0044] like Figure 1 As shown, an automatic sample preparation device for testing the tensile properties of carbon fiber multifilaments, a scraper assembly 30 is installed on the right side of the second fixed frame 21, a heating furnace 38 is provided on the right side of the scraper assembly 30, a cutting assembly 39 is provided on the right side of the heating furnace 38, the heating furnace 38 and the cutting assembly 39 are both installed on the top of the device body 1, a second linear motor 40 is installed on the top of the cutting assembly 39, a mounting frame is installed on the bottom of the second linear motor 40, a cutting knife 42 is installed on the bottom of the mounting frame, a hydraulic lifting rod 41 is installed on the top of the cutting knife 42, and the hydraulic lifting rod 41 is installed on the top of the mounting frame.

[0045] An automatic sample preparation method for testing the tensile properties of carbon fiber multifilaments, applied to the above-mentioned automatic sample preparation device for testing the tensile properties of carbon fiber multifilaments, comprises the following operating steps:

[0046] S1: The room environment where the device body 1 is located is adjusted to 25°C ± 2°C and the relative humidity is 50% ± 10%, and the carbon fiber multifilament is left to stand in this environment for more than 2 hours;

[0047] S2: removing the carbon fiber multifilaments on the surface of the carbon fiber multifilaments after the static state, pulling out the carbon fiber multifilaments and placing them on the transmission shaft, and passing them through the adjusting roller 4, the lifting wheel 6, the guide wheel 9, the tension wheel 11, the adjusting component 14, the dipping wheel 22, the inner cavity of the scraping component 30, and the heating furnace 38, and placing them at the cutting component 39 through the positioning frame;

[0048] S3: The heights of the three lifting wheels 6 are adjusted according to the use requirements, so that they move in the inner cavity of the adjustment slot 5. After moving to a suitable position, they are limited by the positioning bolts 7, and the first linear motor 10 is started to adjust the height of the tension wheel 11 until it is adjusted to a suitable position. The servo motor 18 is started to drive the belt 19 and the pulley 20, thereby driving the two retaining wheels 15 on the opposite side to rotate, and the carbon fiber multifilament can be fed at this time;

[0049] S4: Start the thermostat 23 for preheating, pour the resin into the inner cavity of the thermostat 23, start the rotary motor 25, drive the screw 28 to rotate, so that the right connecting rod 27 can drive the lifting assembly 26 to adjust the height until the resin in the inner cavity of the thermostat 23 can immerse the carbon fiber multifilaments, and perform glue dispensing on the carbon fiber multifilaments immersed in the resin;

[0050] S5: After the dispensing is completed, the carbon fiber multifilament enters the inner cavity of the glue scraping assembly 30, and the rotating handle 33 is rotated to drive the bidirectional screw rod 35 to rotate, so that the top of the scraper 34 can be threadedly connected with it, so as to adjust the distance between the two scrapers 34 according to the size and required shape of the carbon fiber multifilament, wherein the shape includes but is not limited to round, square and triangular. After the adjustment is completed, the carbon fiber multifilament is conveyed, and at this time, the scraper 34 can perform glue scraping on the carbon fiber multifilament;

[0051] S6: putting the carbon fiber multifilament after the coating into the inner cavity of the heating furnace 38 and heating it at 80° C. for 2 hours to cure it;

[0052] S7: After the carbon fiber multifilament is moved to a suitable position according to the size of the required sample, the second linear motor 40 and the hydraulic lifting rod 41 are started to adjust the position of the cutting knife 42 to cut the carbon fiber multifilament. At this time, the sample preparation is completed.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic sample preparation device for testing the tensile properties of carbon fiber multifilaments, comprising a device body (1), characterized in that: A first fixed frame (2) is installed on the left side of the device body (1); the outer wall of the first fixed frame (2) is rotatably connected to a discharge shaft (3) and an adjusting roller (4); a lifting wheel (6) is arranged on the right side of the adjusting roller (4); a second fixed frame (21) is installed on the left side of the top of the device body (1); the outer wall of the second fixed frame (21) is rotatably connected to a guide wheel (9); and the outer wall of the second fixed frame (21) is provided with a retaining wheel (15) and a tension wheel (11); A thermostat (23) is installed on the outer wall of the second fixed frame (21); a top of the inner cavity of the thermostat (23) is rotatably connected to a dipping wheel (22); and a lifting assembly (26) is movably connected to the bottom of the inner cavity of the thermostat (23); A scraper assembly (30) is installed on the right side of the second fixing frame (21), a heating furnace (38) is arranged on the right side of the scraper assembly (30), and a cutting assembly (39) is arranged on the right side of the heating furnace (38).

2. The automatic sample preparation device for testing the tensile properties of carbon fiber multifilament according to claim 1, characterized in that: There are three lifting wheels (6), an outer wall of the first fixing frame (2) is provided with an adjusting groove (5), one end of the lifting wheel (6) is movably connected in the inner cavity of the adjusting groove (5), a side edge of the first fixing frame (2) is threadedly connected with a positioning bolt (7), and the positioning bolt (7) extends into the inner cavity of the adjusting groove (5) and fits against the side edge of the outer wall of the lifting wheel (6).

3. The automatic sample preparation device for testing the tensile properties of carbon fiber multifilament according to claim 1, characterized in that: There are two guide wheels (9), and the two guide wheels (9) are symmetrically rotatably connected to the two sides of the tension wheel (11). A connecting seat (12) is movably connected in the inner cavity on the left side of the outer wall of the second fixed frame (21). The outer wall of the second fixed frame (21) is installed with a first linear motor (10), and the two sides of the connecting seat (12) are installed on the first linear motor (10).

4. The automatic sample preparation device for testing the tensile properties of carbon fiber multifilament according to claim 1, characterized in that: Active grooves (13) are symmetrically provided on both sides of the outer wall of the second fixing frame (21), and adjustment components (14) are provided on both sides of the inner cavity of the active groove (13), two adjustment components (14) on opposite sides are installed in the inner cavities of the two active grooves (13), and two adjustment components (14) on opposite sides are movably connected in the inner cavities of the two active grooves (13).

5. The automatic sample preparation device for testing the tensile properties of carbon fiber multifilament according to claim 4, characterized in that: There are four retaining wheels (15), which are respectively mounted on the outer walls of the four adjusting components (14). Hydraulic push rods (16) are symmetrically mounted on the tops of the adjusting components (14) on both sides, and the hydraulic push rods (16) are mounted in the inner cavity of the second fixing frame (21).

6. The automatic sample preparation device for testing the tensile properties of carbon fiber multifilament according to claim 5, characterized in that: A driving assembly (17) is installed on the outer wall of the second fixed frame (21); a servo motor (18) is installed on the right side of one end of the driving assembly (17) away from the second fixed frame (21); a belt (19) is installed in the inner cavity of the driving assembly (17); pulleys (20) are installed at both ends of the inner cavity of the belt (19); the servo motor (18) is installed on the outer wall of the pulley (20) on the right side through a first rotating shaft; and the two pulleys (20) are symmetrically installed on the outer walls of the retaining wheel (15) on two opposite sides.

7. The automatic sample preparation device for testing the tensile properties of carbon fiber multifilament according to claim 1, characterized in that: A lifting groove (24) is symmetrically provided on both sides of the thermostat (23). A rotating motor (25) is installed at the bottom of the right side of the thermostat (23). A screw rod (28) is installed on the top of the rotating motor (25) through a second rotating shaft. The screw rod (28) is rotatably connected to the inner cavity of the lifting groove (24). A guide rod (29) is installed in the inner cavity of the lifting groove (24) on the left side. Connecting rods (27) are symmetrically installed on the top of both sides of the lifting assembly (26). The connecting rods (27) are movably connected to the side of the thermostat (23). The bottom of the side of the connecting rod (27) is movably connected to the inner cavity of the lifting groove (24). The bottom of the side of the connecting rod (27) on the right side is threadedly connected to the outer wall of the screw rod (28), and the bottom of the side of the connecting rod (27) on the left side is sleeved on the outer wall of the guide rod (29).

8. The automatic sample preparation device for testing the tensile properties of carbon fiber multifilament according to claim 1, characterized in that: A filter is installed at the bottom of the inner cavity of the scraper assembly (30), a waste glue collection box (31) is installed at the bottom of the scraper assembly (30), an exhaust fan (32) is installed at the bottom of the waste glue collection box (31), the waste glue collection box (31) is communicated with the inner cavity of the scraper assembly (30), scrapers (34) are symmetrically and movably connected on both sides of the inner cavity of the scraper assembly (30), a bidirectional screw rod (35) is rotatably connected at the top of the inner cavity of the scraper assembly (30), a rotating handle (33) is rotatably connected at the outer wall of the scraper assembly (30), the rotating handle (33) is installed on the outer wall of the bidirectional screw rod (35), the top of the scraper (34) is threadedly connected to the outer wall of the bidirectional screw rod (35), a conveying frame (36) is installed on the right side of the scraper assembly (30), and a conveying wheel (37) is rotatably connected in the inner cavity at the top of the conveying frame (36).

9. The automatic sample preparation device for testing the tensile properties of carbon fiber multifilament according to claim 1, characterized in that: The heating furnace (38) and the cutting assembly (39) are both installed on the top of the device body (1); a second linear motor (40) is installed on the top of the cutting assembly (39); a mounting frame is installed on the bottom of the second linear motor (40); a cutting knife (42) is installed on the bottom of the mounting frame; a hydraulic lifting rod (41) is installed on the top of the cutting knife (42); and the hydraulic lifting rod (41) is installed on the top of the mounting frame.

10. An automatic sample preparation method for testing the tensile properties of carbon fiber multifilaments, applied to the above-mentioned automatic sample preparation device for testing the tensile properties of carbon fiber multifilaments, characterized in that: The steps include: S1: The room environment where the device body (1) is located is adjusted to 25°C ± 2°C and the relative humidity is 50% ± 10%, and the carbon fiber multifilament is left to stand in this environment for more than 2 hours; S2: removing the carbon fiber multifilaments on the surface of the carbon fiber multifilaments after the standing is completed, pulling out the carbon fiber multifilaments and placing them on the transmission shaft, and passing them through the adjusting roller (4), the lifting wheel (6), the guide wheel (9), the tension wheel (11), the adjusting component (14), the dipping wheel (22), the inner cavity of the scraping component (30), and the heating furnace (38), and placing them on the cutting component (39) through the positioning frame; S3: The heights of the three lifting wheels (6) are adjusted according to the use requirements so that they can move in the inner cavity of the adjustment slot (5). After they move to a suitable position, they are limited by the positioning bolts (7). The first linear motor (10) is started to adjust the height of the tension wheel (11) until it is adjusted to a suitable position. The servo motor (18) is started to drive the belt (19) and the pulley (20), thereby driving the two retaining wheels (15) on the opposite side to rotate. At this time, the carbon fiber multifilament can be fed; S4: Start the thermostat (23) for preheating, pour the resin into the inner cavity of the thermostat (23), start the rotary motor (25), drive the screw rod (28) to rotate, so that the right connecting rod (27) can drive the lifting assembly (26) to adjust the height until the resin in the inner cavity of the thermostat (23) can immerse the carbon fiber multifilaments, and perform glue dispensing on the carbon fiber multifilaments immersed in the resin; S5: After the dispensing is completed, the carbon fiber multifilament enters the inner cavity of the glue scraping assembly (30), and the rotating handle (33) is rotated to drive the bidirectional screw rod (35) to rotate, so that the top of the scraper (34) can be threadedly connected with it, so that the distance between the two scrapers (34) is adjusted according to the size and required shape of the carbon fiber multifilament, wherein the shape includes but is not limited to round, square and triangular. After the adjustment is completed, the carbon fiber multifilament is conveyed, and the scraper (34) can now perform glue scraping on the carbon fiber multifilament; S6: placing the carbon fiber multifilament after the scraping into the inner cavity of the heating furnace (38), and heating at 80° C. for 2 hours to solidify it; S7: After the carbon fiber multifilament is moved to a suitable position according to the size of the required sample, the second linear motor (40) and the hydraulic lifting rod (41) are started to adjust the position of the cutting knife (42) to cut the carbon fiber multifilament. At this time, the sample preparation is completed.

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