Clamping tool for fatigue test of composite laminated plate and use method of clamping tool

Abstract

The invention discloses a composite laminated plate fatigue test clamping tool and a use method thereof.The composite laminated plate fatigue test clamping tool comprises a mounting plate, a mounting base, a mounting block and a convenient-to-disassemble mechanism, and the convenient-to-disassemble mechanism comprises a vertical limiting plate, a horizontal limiting plate, a first connecting rod, a second connecting rod, a pull rod, a first pull rod, a second pull plate and a limiting plug pin; the vertical limiting plate is fixed to the upper portion of the left side or the right side of the mounting block, an inserting sleeve is fixed to the vertical limiting plate, the horizontal limiting plate is fixed to the left side or the right side of the bottom of the mounting block, and a U-shaped inserting groove with a downward opening is formed in the bottom of the horizontal limiting plate; the second connecting rod can extend into the U-shaped inserting groove, a limiting ring is fixed to the second connecting rod, one end of the limiting bolt is fixed to the second pulling plate, and the other end of the limiting bolt extends into the mounting base and penetrates through the first connecting rod and the inserting sleeve. When test fixtures of different specifications or types are frequently replaced, the time consumption is short, the operation is simple, and the working efficiency is high.

Description

Technical Field

[0001] The invention relates to a composite material laminate fatigue test clamping tool and a use method thereof, belonging to the technical field of carbon fiber reinforced composite materials. Background Art

[0002] In modern manufacturing, carbon fiber reinforced composite materials have been widely used in aerospace, automotive industry, sports equipment and other fields due to their light weight and high strength. In order to ensure that the performance of these materials and their products meets the expected standards, a series of rigorous tests are usually carried out during the production process. Among them, fatigue testing is a crucial link. Fatigue testing is designed to simulate the long-term stress of materials in actual application environments and evaluate the durability of materials under repeated stress.

[0003] In the fatigue test of carbon fiber reinforced composite panels, the usual practice is to place the sample to be tested on a fixed fixture, and then apply a predetermined pressure or tension to it through another movable fixture. This test method can effectively simulate the dynamic load conditions under actual use conditions, thereby evaluating the fatigue resistance of the material.

[0004] However, traditional carbon fiber reinforced composite plate test fixtures are mostly installed and fixed by screws and screws. Although this method can provide a stable fixing effect, it has some obvious disadvantages in practical applications. For example, when frequently replacing test fixtures of different specifications or types, the traditional fixing method is not only time-consuming, but also increases the complexity of operation and reduces work efficiency. In addition, there is a risk of damage to the fixture or sample due to improper operation during the disassembly and assembly process. Summary of the invention

[0005] The purpose of the present invention is to provide a composite laminate fatigue test clamping tool to solve the problem that in the prior art, carbon fiber reinforced composite plate test fixtures are installed and fixed by means of screws and screws, and when test fixtures of different specifications or types are frequently replaced, it is not only time-consuming, but also increases the complexity of operation, low work efficiency, and the risk of damage to the fixture or sample due to improper operation during the disassembly and assembly process.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: a composite laminate fatigue test clamping tool, including a mounting plate and a mounting base, the mounting base is used to install a concave fatigue test base or a pressurized fatigue test head when in use, and also includes a mounting block and a convenient disassembly mechanism arranged on the left and / or right side of the mounting block, the mounting block is fixed to the concave fatigue test base or the pressurized fatigue test head and inserted into the mounting base when in use, the convenient disassembly mechanism includes a vertical limit plate, a horizontal limit plate, a first connecting rod, a second connecting rod, a pull rod, a first pull rod, a second pull plate and a limit latch, the vertical limit plate is fixed to the upper left or right side of the mounting block, a plug-in sleeve is fixed on the vertical limit plate, the horizontal limit plate is fixed to the left or right side of the bottom of the mounting block, and the bottom of the horizontal limit plate is provided with a U-shaped plug opening downward The first connecting rod is in a vertical state, and its top can be inserted into the plug-in sleeve. The second connecting rod is horizontal and fixedly connected to the bottom end of the first connecting rod. The second connecting rod can be inserted into the U-shaped slot and move left and right relative to the U-shaped slot. A limiting ring is fixed on the second connecting rod to limit the movement of the second connecting rod. The pull rod is horizontal, one end of which is fixedly connected to the middle part of the first connecting rod, and the other end extends out of the mounting base, and can move horizontally and vertically relative to the mounting base. One end of the limiting pin is fixed on the second pull plate, and the other end extends into the mounting base and passes through the first connecting rod and the plug-in sleeve to fix the first connecting rod and the plug-in sleeve. The vertical movement of the pull rod is used for the first connecting rod to enter and exit the plug-in sleeve. When the first connecting rod is moved out of the plug-in sleeve, the pull rod moves horizontally to pull the second connecting rod to move horizontally.

[0007] As a further improvement of the present invention, it also includes a first pull plate, which is fixed to one end of the pull rod extending out of the mounting base and is used to move the pull rod vertically and horizontally when in use.

[0008] As a further improvement of the present invention, it also includes a plug-in rod, which is fixed at the top end of the first connecting rod and can be inserted into the plug-in sleeve. Limiting holes are provided on the plug-in rod and the plug-in sleeve. When the plug-in rod is inserted into the plug-in sleeve, the limiting holes on the two correspond to each other, and the limiting pin can be inserted into the two limiting holes to fix the plug-in rod and the plug-in sleeve.

[0009] As a further improvement of the present invention, it also includes a card-connecting rod, which is fixed on one end of the second connecting rod close to the horizontal limit plate. The card-connecting rod is colinear with the second connecting rod, and the limit ring is arranged at the connection between the second connecting rod and the card-connecting rod.

[0010] As a further improvement of the present invention, it further comprises a threaded rod and a threaded seat, wherein the threaded seat is fixed on the mounting base, and the threaded rod passes through the second pull plate and is threadably matched with the threaded seat on the mounting base.

[0011] As a further improvement of the present invention, there are two convenient disassembly mechanisms, which are respectively located on the left and right sides of the mounting block. A limit pin is fixed to each of the left and right ends of the second pull plate. The two limit pins both extend into the mounting base and are respectively used to fix the first connecting rod and the plug-in sleeve of the two convenient disassembly mechanisms.

[0012] As a further improvement of the present invention, a plurality of mounting screws are provided on the mounting plate for fixing the mounting plate on a fixed object when in use.

[0013] As a further improvement of the present invention, it also includes a vertical reset mechanism, which includes a sliding sleeve, a fixed base plate, a third connecting rod and an elastic component. The fixed base plate is fixed on the inner surface of the mounting base, the sliding sleeve is sleeved on the pull rod and can move relative to the pull rod, the top end of the third connecting rod is fixedly connected to the sliding sleeve, and the elastic component connects the bottom end of the third connecting rod and the fixed base plate. When the pull rod moves downward, the elastic component contracts. When the pull rod is released, the elastic component resets and pushes the pull rod to move upward.

[0014] As a further improvement of the present invention, it also includes a limiting sleeve, which is fixed on the fixed bottom plate. The bottom end of the third connecting rod extends downward into the limiting sleeve and can move up and down relative to the limiting sleeve. The elastic component is arranged in the limiting sleeve.

[0015] Another object of the present invention is to provide a method for using a composite laminate fatigue test fixture, wherein The steps for disassembling a pressurized fatigue test head or a concave fatigue test base include: S1.1. Pull the limit pin outward from the mounting base to release the first connecting rod and the plug-in sleeve; S1.2, vertically move the pull rod to move the first connecting rod away from the plug-in sleeve, so that the first connecting rod is separated from the plug-in sleeve; S1.3. Pull the pull rod toward the outside of the mounting base to move the second connecting rod away from the horizontal limit plate; S1.4. Remove the mounting block together with the pressurized fatigue test head or the concave fatigue test base from the mounting base to complete the installation and disassembly of the pressurized fatigue test head or the concave fatigue test base; The installation steps of the pressurized fatigue test head or concave fatigue test base include: S2.1. Move vertically and pull the pull rod outward from the mounting base, align the mounting block on the new pressurized fatigue test head or concave fatigue test base with the mounting base and insert it into the mounting base; S2.2. Push the pull rod toward the mounting block to move the second connecting rod toward the horizontal limit plate until the limit ring fits the horizontal limit plate; S2.3, vertically move the pull rod to move the first connecting rod toward the plug-in sleeve; S2.4. Insert the limit pin into the mounting base to fix the first connecting rod and the plug-in sleeve, and complete the installation of the pressurized fatigue test head or the concave fatigue test base.

[0016] To sum up, the beneficial effects of the present invention are as follows: the composite laminate fatigue test clamping tool and use method, through the combination of the plug-in sleeve and the plug-in rod, cooperate with the design of the limit ring and the horizontal limit plate, so that the pressurized fatigue test head and the concave fatigue test base can be quickly installed and disassembled without using screws; during operation, only the second pull plate needs to be pulled outward to disengage the limit pin from the plug-in sleeve and the limit socket in the plug-in rod to release the limit device; then the limit ring and the card-connecting plug rod are driven away from the horizontal limit plate by the pull rod to release the card-connecting state; finally, when the limit ring and the card-connecting plug rod are completely moved out of the limit position, the mounting block can be easily removed from the mounting base. This process avoids the tedious steps of manually tightening screws required for traditional clamps, and significantly improves the speed of replacing clamps.

[0017] The composite laminate fatigue test clamping tool and use method utilize the elasticity of the spring to automatically complete the limiting function without manual tightening; when installing a new pressurized fatigue test head or a concave fatigue test base, it is only necessary to align its mounting block with the position of the mounting base and insert it, and then push the pull rod to make the limiting ring contact with the horizontal limiting plate, and the card-connecting plug rod is accurately inserted into the U-shaped slot inside the horizontal limiting plate; after loosening the pull rod, the spring pushes the first connecting rod upward, so that the plug rod is plugged into the plug sleeve to form a stable connection, which not only ensures the firmness of the fixture, but also reduces the possibility of damage to the fixture or the specimen due to improper operation because there is no need for excessive manual force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the present invention.

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the convenient disassembly mechanism in the present invention.

[0020] Figure 3 It is a schematic structural diagram of the second pull plate and the limiting latch in the present invention.

[0021] Figure 4 It is a schematic diagram of the easy disassembly mechanism of the present invention.

[0022] Figure 5 For the present invention Figure 1 A is an enlarged schematic diagram.

[0023] Wherein: 1. Mounting plate; 2. Mounting base; 3. Easy disassembly mechanism; 301. Mounting block; 302. Vertical limit plate; 303. Horizontal limit plate; 304. Plug-in sleeve; 305. Plug-in rod; 306. First connecting rod; 307. Second connecting rod; 308. Limiting ring; 309. Card-connected plug-in rod; 310. Fixed bottom plate; 311. Limiting sleeve; 312. Spring; 313. Third connecting rod; 314. Pull rod; 315. Sliding sleeve; 316. First pull plate; 317. Limiting socket; 318. Threaded seat; 319. Second pull plate; 320. Limiting pin; 321. Threaded rod; 4. Pressurized fatigue test head; 5. Concave fatigue test base. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings. Example 1

[0025] This embodiment is a composite material laminate fatigue test fixture. Figure 1 As shown, it includes a mounting plate 1 and a mounting base 2. The mounting plate 1 in this embodiment is a rectangular plate. The mounting base 2 is used to install a concave fatigue test base 5 or a pressurized fatigue test head 4 when in use. When in use, this embodiment is provided with two mounting plates 1 and mounting bases 2. The two mounting plates 1 are arranged in parallel, and a mounting base 2 is fixed on each of the surfaces of the two mounting plates 1 facing each other. A plurality of mounting screws are provided on the mounting plate 1. The mounting screws are used to cooperate with the threads of the fixed object in the use state to fix the mounting plate 1 on the fixed object, wherein the fixed object can be, for example, a press machine.

[0026] like Figure 1 As shown, this embodiment is provided with a mounting block 301 and two convenient disassembly mechanisms 3 respectively arranged on the left and right sides of the mounting block 301. The mounting block 301 is fixed on the concave fatigue test base 5 or the pressurized fatigue test head 4 and inserted into the mounting base 2 in the use state. When in use, the mounting block 301 and the mounting base 2 are fixed by the convenient disassembly mechanisms 3. Figure 2 and Figure 4As shown, the disassembly mechanism 3 includes a vertical limit plate 302, a horizontal limit plate 303, a first connecting rod 306, a second connecting rod 307, a pull rod 314, a first pull rod 314, a second pull plate 319 and a limit pin 320. The vertical limit plate 302 is fixed to the upper part of the left or right side of the mounting block 301, and a plug sleeve 304 is fixedly provided on the lower surface of the vertical limit plate 302. The horizontal limit plate 303 is fixed to the left or right side of the bottom surface of the mounting block 301, and a U-shaped opening with an opening downward is provided at the bottom of the horizontal limit plate 303. shaped slot, the first connecting rod 306 is in a vertical state, and its top can be inserted into the plug sleeve 304, the second connecting rod 307 is horizontal and fixedly connected to the bottom end of the first connecting rod 306, the second connecting rod 307 can be inserted into the U-shaped slot and move left and right relative to the U-shaped slot, and a limiting ring 308 is fixed on the second connecting rod 307 to limit the movement of the second connecting rod 307, wherein the outer diameter of the limiting ring 308 is larger than the diameter of the arc portion of the U-shaped slot at the bottom of the slot, and the pull rod 314 is horizontal, and one end of which is connected to the first connecting rod 306. The middle part of a connecting rod 306 is fixedly connected. The pull rod 314 and the second connecting rod 307 in this embodiment are respectively located on both sides of the first connecting rod 306. The other end of the pull rod 314 extends out of the mounting base 2 and can move horizontally and vertically relative to the mounting base 2. In this embodiment, vertical slide grooves are symmetrically opened on the left and right sides of the mounting base 2. The pull rod 314 extends out of the mounting base 2 from the slide groove, so that the pull rod 314 can move horizontally in the slide groove and can move vertically in the slide groove. One end of the limit pin 320 is fixed on the second On the pull plate 319, the other end extends from the front side surface of the mounting base 2 into the mounting base 2 and passes through the first connecting rod 306 and the plug-in sleeve 304, which is used to fix the first connecting rod 306 and the plug-in sleeve 304, so that the mounting block 301 is fixed to the mounting base 2. In this embodiment, the pull rod 314 moves vertically to push or pull the first connecting rod 306 in and out of the plug-in sleeve 304. When the first connecting rod 306 moves out of the plug-in sleeve 304, the pull rod 314 moves horizontally to pull the second connecting rod 307 to move horizontally.

[0027] like Figure 4 As shown, in order to facilitate the movement of the pull rod 314, the present embodiment is provided with a first pull plate 316, which is fixed on one end of the pull rod 314 extending out of the mounting base 2 and is perpendicular to the pull rod 314. The first pull plate 316 is used to move the pull rod 314 vertically and horizontally when in use. When the present embodiment is in use, the first pull plate 316 can be held to move the pull rod 314 horizontally and vertically.

[0028] like Figure 4As shown, the present embodiment is provided with a plug-in rod 305, which is fixed at the top end of the first connecting rod 306 and is colinear with the center line of the first connecting rod 306. The plug-in rod 305 can be inserted into the plug-in sleeve 304. Limiting holes 317 are provided on the plug-in rod 305 and the plug-in sleeve 304. When the plug-in rod 305 is inserted into the plug-in sleeve 304, the limiting holes 317 on the plug-in rod 305 and the plug-in sleeve 304 correspond to each other. The limiting pin 320 can be inserted into the two limiting holes 317 to fix the plug-in rod 305 and the plug-in sleeve 304. By fixing the plug-in rod 305 and the plug-in sleeve 304, the first connecting rod 306 and the plug-in sleeve 304 are fixed.

[0029] like Figure 4 As shown, the present embodiment is provided with a card plug rod 309, which is fixed on one end of the second connecting rod 307 close to the horizontal limit plate 303, wherein the diameter of the card plug rod 309 is smaller than the diameter of the second connecting rod 307, and the card plug rod 309 is collinear with the second connecting rod 307, and the outer diameter of the limit ring 308 is larger than the diameter of the second connecting rod 307, so that the outer diameter of the limit ring 308 is also larger than the diameter of the card plug rod 309, and the limit ring 308 is arranged at the connection between the second connecting rod 307 and the card plug rod 309. In the present embodiment, the second connecting rod 307, the limit ring 308 and the card plug rod 309 can be made into an integral part, or can be fixed by welding. The diameter of the card plug rod 309 is slightly smaller than the diameter of the arc part at the bottom of the U-shaped slot. When the limit ring 308 is in fit with the horizontal limit plate 303, the card plug rod 309 is inserted into the U-shaped slot.

[0030] like Figure 1 and Figure 3 As shown, this embodiment is provided with a threaded rod 321 and a threaded seat 318 . The threaded seat 318 is welded and fixed on the front surface of the mounting base 2 . The threaded rod 321 passes through the second pull plate 319 and is threadably matched with the threaded seat 318 on the mounting base 2 . Since there are two easy-to-disassemble mechanisms 3 in this embodiment, the two easy-to-disassemble mechanisms 3 are respectively located on the left and right sides of the mounting block 301 and are symmetrically distributed about the mounting block 301. A limit pin 320 is fixed to each of the left and right ends of the second pull plate 319. The limit pins 320 at both ends of the second pull rod 319 are symmetrically distributed about the threaded rod 321. Two through holes that are connected to the interior of the mounting base 2 are symmetrically opened about the threaded seat 318 on the front surface of the mounting base 2. The two limit pins 320 extend into the mounting base 2 from the two through holes respectively, and are respectively inserted into the limit sockets 317 on the plug-in sleeve 304 and the plug-in rod 305, so as to fix the plug-in sleeves 304 of the two easy-to-disassemble mechanisms 3 and the plug-in rod 305 installed on the first connecting rod 306.

[0031] like Figure 1 , Figure 4 and Figure 5 As shown, the present embodiment is optimally provided with a vertical reset mechanism, which includes a sliding sleeve 315, a fixed base plate 310, a third connecting rod 313 and an elastic component 312. The fixed base plate 310 is fixed on the inner surface of the mounting base 2. The sliding sleeve 315 is sleeved on the pull rod 314 and can move relative to the pull rod 314. The top end of the third connecting rod 313 is fixedly connected to the sliding sleeve 315. The elastic component 312 connects the bottom end of the third connecting rod 313 and the fixed base plate 310. When the pull rod 314 moves downward, the elastic component 312 contracts. When the pull rod 314 is released, the elastic component 312 resets and pushes the pull rod 314 to move upward. The elastic component 312 in the present embodiment is a spring. In this embodiment, a limiting sleeve 311 is provided, and the limiting sleeve 311 is fixed on the upper surface of the fixed bottom plate 310. The bottom end of the third connecting rod 313 extends downward into the limiting sleeve 311 and can move up and down relative to the limiting sleeve 311. In this embodiment, a circular plate is fixedly provided on one end of the second connecting rod 313 extending into the limiting sleeve 311. The elastic component 312 is provided in the limiting sleeve 311. The top of the elastic component 312 is fixedly connected to the lower surface of the circular plate, and the bottom end of the elastic component 312 is fixedly connected to the bottom end of the inner surface of the limiting sleeve 311. By providing the limiting sleeve 311, it is possible to effectively prevent the elastic component 312 from being greatly deformed horizontally due to pressure. In this embodiment, a re-straightening and resetting mechanism is provided. When the first pull plate 316 is released, the spring is reset, and the first connecting rod 306 and the plug rod 305 can be pushed to automatically move vertically, so that the plug rod 305 bounces back into the plug sleeve 304, which is more convenient for the installation of this embodiment. Example 2

[0032] This embodiment is a method for using the composite material laminate fatigue test fixture of embodiment 1, which includes a disassembly method and an installation method, wherein: The steps of disassembling the pressurized fatigue test head 4 or the concave fatigue test base 5 include: S1.1. Twist the threaded rod 321 to pull the limit pin 320 out of the mounting base 2, and move the limit pin 320 out of the limit socket 317 on the plug sleeve 304 and the plug rod 305, so that the limit pin 320 releases the plug sleeve 304 and the plug rod 305 on the first connecting rod 306.

[0033] S1.2. Move the pull rod 314 vertically to move the first connecting rod 306 in a direction away from the plug-in sleeve 304, so that the plug-in rod 305 on the first connecting rod 306 is disengaged from the plug-in sleeve 304. In this state, the sliding sleeve 315 and the third connecting rod 313 move synchronously with the movement of the pull rod 314, and the third connecting rod 313 pushes the elastic component 312 to compress.

[0034] S1.3. Pull the pull rod 314 toward the outside of the mounting base 2 to move the second connecting rod 307 in a direction away from the horizontal limit plate 303. In this state, the position of the sliding sleeve 315 remains unchanged, and the pull rod 314 moves horizontally relative to the sliding sleeve 315 until the card-connecting rod 309 is completely removed from the U-shaped slot.

[0035] S1.4. Remove the mounting block 301 together with the pressurized fatigue test head 4 or the concave fatigue test base 5 from the mounting base 2 to complete the installation and disassembly of the pressurized fatigue test head 4 or the concave fatigue test base 5.

[0036] The installation steps of the pressurized fatigue test head 4 or the concave fatigue test base 5 include: S2.1. Move the pull rod 314 vertically until the plug-in rod 305 is completely removed from the plug-in sleeve 304, and pull the pull rod 314 outward from the mounting base 2, align the mounting block 301 on the new pressurized fatigue test head 4 or the concave fatigue test base 5 with the mounting base 2 and insert it into the mounting base 2.

[0037] S2.2. Push the pull rod 314 toward the mounting block 301 to move the second connecting rod 307 and the plug-in rod 309 at one end thereof toward the horizontal limit plate 303 until the limit ring 308 fits with the horizontal limit plate 303. At this time, the plug-in rod 309 is inserted into the U-shaped slot.

[0038] S2.3, vertically move the pull rod 314, specifically, loosen the first pull plate 316, the elastic component 312 extends and pushes the third connecting rod 313, the sliding sleeve 315 and the pull rod 314 to move vertically, and the first connecting rod 306 moves toward the direction of the plug-in sleeve 304 until the plug-in rod 305 is inserted into the plug-in sleeve 304. When the first connecting rod 306 moves vertically, the second connecting rod 307 moves synchronously, and the card plug rod 309 moves in the U-shaped slot.

[0039] S2.4. When the limit socket 317 on the plug-in rod 305 is aligned with the limit socket 317 on the plug-in sleeve 304, the limit pin 320 is inserted into the mounting base 2 to fix the first connecting rod 306 and the plug-in sleeve 304. Specifically, the two limit pins 320 are respectively inserted into the two through holes on the mounting base 2, and the threaded rod 321 is screwed to push the limit pin 320 into the mounting base 2 until it is inserted into the limit socket 317 on the plug-in rod 305 and the plug-in sleeve 304, thereby completing the installation of the pressurized fatigue test head 4 or the concave fatigue test base 5.

[0040] The present invention uses a combination of the plug-in sleeve 304 and the plug-in rod 305, and cooperates with the design of the limit ring 308 and the horizontal limit plate 303, so that the pressurized fatigue test head 4 and the concave fatigue test base 5 can be quickly installed and disassembled without using screws. During operation, it is only necessary to pull the second pull plate 319 outward to disengage the limit pin 320 from the plug-in sleeve 304 and the limit socket 317 in the plug-in rod 305 to release the limit device, and then use the pull rod 314 to drive the limit ring 308 and the card plug rod 309 away from the horizontal limit plate 303 to release the card state. Finally, when the limit ring 308 and the card plug rod 309 are completely moved out of the limit position, the mounting block 301 can be easily removed from the mounting base 2. This process avoids the tedious steps of manually tightening screws in the existing clamps, which significantly improves the speed of replacing the clamps.

[0041] In addition, the present invention utilizes the elasticity of the spring 312 to automatically complete the limiting function, without manual tightening. When installing a new pressurized fatigue test head 4 or a concave fatigue test base 5, it is only necessary to align its mounting block 301 with the position of the mounting base 2 and insert it, and then push the pull rod 314 to make the limiting ring 308 contact the horizontal limiting plate 303, and the plug-in rod 309 is accurately inserted into the U-shaped slot inside the horizontal limiting plate 303. After loosening the pull rod 314, the spring 312 pushes the first connecting rod 306 upward, so that the plug-in rod 305 is connected with the plug-in sleeve 309. 4 plug-in to form a stable connection, which not only ensures the firmness of the fixture, but also reduces the possibility of damage to the fixture or sample due to improper operation because there is no need for excessive manual force. It solves the problem that most of the carbon fiber reinforced composite plate test fixtures in the prior art are installed and fixed by screws and screws. When frequently changing test fixtures of different specifications or types, the existing fixing method is not only time-consuming, but also increases the complexity of operation, reduces work efficiency, and may also cause the risk of damage to the fixture or sample due to improper operation during the disassembly and assembly process.

[0042] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. A composite material laminate fatigue test fixture, comprising a mounting plate (1) and a mounting base (2), wherein the mounting base (2) is used to mount a concave fatigue test base (5) or a pressurized fatigue test head (4) in a use state, and characterized in that: The invention also comprises a mounting block (301) and a convenient disassembly mechanism (3) arranged on the left and / or right side of the mounting block (301); the mounting block (301) is fixed on a concave fatigue test base (5) or a pressurized fatigue test head (4) and inserted into the mounting base (2) in a use state; the convenient disassembly mechanism (3) comprises a vertical limit plate (302), a horizontal limit plate (303), a first connecting rod (306), a second connecting rod (307), a pull rod (314), a first pull rod (314), a second pull plate (31 9) and a limit pin (320), a vertical limit plate (302) is fixed to the upper left or right side of the mounting block (301), a plug sleeve (304) is fixed to the vertical limit plate (302), a horizontal limit plate (303) is fixed to the left or right side of the bottom of the mounting block (301), a U-shaped slot opening downward is provided at the bottom of the horizontal limit plate (303), a first connecting rod (306) is in a vertical state, a top of which can be inserted into the plug sleeve (304), and a second connecting rod (307) is in a horizontal state, The second connecting rod (307) is fixedly connected to the bottom end of the first connecting rod (306), the second connecting rod (307) can be inserted into the U-shaped slot and can move left and right relative to the U-shaped slot, a limit ring (308) is fixed on the second connecting rod (307) for limiting the movement of the second connecting rod (307), the pull rod (314) is horizontal, one end of which is fixedly connected to the middle of the first connecting rod (306), and the other end extends out of the mounting base (2) and can move horizontally and vertically relative to the mounting base (2), and the limit pin (320) One end of the pull rod (314) is fixed to the second pull plate (319), and the other end extends into the mounting base (2) and passes through the first connecting rod (306) and the plug-in sleeve (304), and is used to fix the first connecting rod (306) and the plug-in sleeve (304). The pull rod (314) moves vertically to enable the first connecting rod (306) to enter and exit the plug-in sleeve (304). When the first connecting rod (306) moves out of the plug-in sleeve (304), the pull rod (314) moves horizontally to pull the second connecting rod (307) to move horizontally.

2. The composite material laminate fatigue test fixture according to claim 1, characterized in that: It also includes a first pull plate (316), which is fixed to one end of the pull rod (314) extending out of the mounting base (2) and is used to move the pull rod (314) vertically and horizontally when in use.

3. The composite material laminate fatigue test fixture according to claim 1, characterized in that: It also includes a plug rod (305), which is fixed to the top end of the first connecting rod (306) and can be inserted into the plug sleeve (304). The plug rod (305) and the plug sleeve (304) are both provided with a limit plug hole (317). When the plug rod (305) is inserted into the plug sleeve (304), the limit plug holes (317) on the two correspond to each other. The limit pin (320) can be inserted into the two limit plug holes (317) to fix the plug rod (305) and the plug sleeve (304).

4. The composite material laminate fatigue test fixture according to claim 1, characterized in that: It also includes a card-connecting plug rod (309), which is fixed on one end of the second connecting rod (307) close to the horizontal limit plate (303), the card-connecting plug rod (309) and the second connecting rod (307) are colinear, and a limit ring (308) is arranged at the connection between the second connecting rod (307) and the card-connecting plug rod (309).

5. The composite material laminate fatigue test fixture according to claim 1, characterized in that: It also includes a threaded rod (321) and a threaded seat (318), wherein the threaded seat (318) is fixed on the mounting base (2), and the threaded rod (321) passes through the second pull plate (319) and is threadably matched with the threaded seat (318) on the mounting base (2).

6. The composite material laminate fatigue test fixture according to claim 1, characterized in that: There are two convenient disassembly mechanisms (3), which are respectively located on the left and right sides of the mounting block (301). A limit pin (320) is fixed to each of the left and right ends of the second pull plate (319). The two limit pins (320) extend into the mounting base (2) and are respectively used to fix the first connecting rods (306) and the plug sleeves (304) of the two convenient disassembly mechanisms (3).

7. The composite material laminate fatigue test fixture according to claim 1, characterized in that: A plurality of mounting screws are provided on the mounting plate (1) and are used to fix the mounting plate (1) to a fixed object when in use.

8. The composite laminate fatigue test fixture according to any one of claims 1 to 7, characterized in that: The vertical reset mechanism also includes a sliding sleeve (315), a fixed base plate (310), a third connecting rod (313) and an elastic component (312). The fixed base plate (310) is fixed on the inner surface of the mounting base (2). The sliding sleeve (315) is sleeved on the pull rod (314) and can move relative to the pull rod (314). The top end of the third connecting rod (313) is fixedly connected to the sliding sleeve (315). The elastic component (312) connects the bottom end of the third connecting rod (313) and the fixed base plate (310). When the pull rod (314) moves downward, the elastic component (312) contracts. When the pull rod (314) is released, the elastic component (312) resets and pushes the pull rod (314) to move upward.

9. The composite material laminate fatigue test clamping tool according to claim 8, characterized in that: It also includes a limiting sleeve (311), which is fixed on the fixed bottom plate (310), the bottom end of the third connecting rod (313) extends downward into the limiting sleeve (311) and can move up and down relative to the limiting sleeve (311), and the elastic component (312) is arranged in the limiting sleeve (311).

10. A method for using the composite laminate fatigue test fixture according to claim 7, characterized in that: in The steps of disassembling the pressurized fatigue test head (4) or the concave fatigue test base (5) include: S1.

1. Pull the limit pin (320) outward from the mounting base (2) so that the limit pin (320) releases the first connecting rod (306) and the plug-in sleeve (304); S1.2, vertically moving the pull rod (314) to move the first connecting rod (306) in a direction away from the plug-in sleeve (304), so that the first connecting rod (306) is disengaged from the plug-in sleeve (304); S1.3, pulling the pull rod (314) toward the outside of the mounting base (2) to move the second connecting rod (307) in a direction away from the horizontal limiting plate (303); S1.4, removing the mounting block (301) together with the pressurized fatigue test head (4) or the concave fatigue test base (5) from the mounting base (2), thereby completing the installation and disassembly of the pressurized fatigue test head (4) or the concave fatigue test base (5); The steps of installing the pressurized fatigue test head (4) or the concave fatigue test base (5) include: S2.

1. Move vertically and pull the pull rod (314) outward from the mounting base (2), align the mounting block (301) on the new pressurized fatigue test head (4) or the concave fatigue test base (5) with the mounting base (2), and insert the mounting block (301) into the mounting base (2); S2.2, push the pull rod (314) toward the mounting block (301), so that the second connecting rod (307) moves toward the horizontal limit plate (303), until the limit ring (308) is in contact with the horizontal limit plate (303); S2.3, vertically moving the pull rod (314) to move the first connecting rod (306) toward the plug-in sleeve (304); S2.

4. Insert the limit pin (320) into the mounting base (2) to fix the first connecting rod (306) and the plug-in sleeve (304), thereby completing the installation of the pressurized fatigue test head (4) or the concave fatigue test base (5).

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