Impact test tooling and test method for composite helicopter deck

Abstract

The invention discloses an impact test tool and a test method for a composite helicopter deck, which relate to the technical field of impact test, and include a base and a fixing device, wherein a support frame is fixedly installed on the top of the base, a support groove is opened on the inner wall of the support frame, a support rod is fixedly installed on the top of the inner wall of the support groove, a support plate is slidably installed on the circumferential surface of the support rod, a winding device is provided on the top of the inner wall of the support frame, a steel wire rope is provided inside the winding device, an impact block is slidably installed on the inner wall of the support frame, a hollow T-shaped block and a clamping plate are limited by a U-shaped rod and cannot continue to move to squeeze the deck, so that the clamping plate applies an appropriate clamping force to the deck to be tested, and the correct application of the clamping force can prevent the composite deck from being deformed other than the impact due to inappropriate clamping force during the test, thereby ensuring the accuracy of the impact test result.

Description

Technical Field

[0001] The invention relates to the technical field of impact testing, in particular to an impact testing tool for a composite helicopter deck and a testing method thereof. Background Art

[0002] Impact test fixtures for composite helicopter decks usually consist of supporting structures, impact devices, sensors and safety equipment.

[0003] The patent with patent announcement number CN220322685U relates to an impactor testing tooling, including: a bottom plate, a base, a height adjustment device, a movable plate, a clamping cylinder and a force measuring device, the base is fixed on the bottom plate, and the height adjustment device is arranged on the base; the movable plate is fixed to the movable end of the height adjustment device, and the height between the movable plate and the base can be adjusted by the height adjustment device, the clamping cylinder is arranged on the movable plate, and can clamp the top of the impactor; the force measuring device is arranged on the bottom plate corresponding to the impactor. This patent adopts a clamping cylinder to clamp the top of the impactor, thereby preventing the impactor from being displaced due to the impact force during the test, ensuring the quality of the product and the test effect, and arranging a force measuring device at the striking position of the impactor to monitor the test data of the impactor in real time, so as to accurately judge the various performances of the impactor and further improve the product quality.

[0004] In the above patent, the top of the impactor is clamped by using a clamping cylinder to prevent the impactor from being displaced due to the impact force during the test, thereby ensuring the quality of the product and the test effect. However, it is difficult to apply appropriate clamping force to the tested object. If the tested object is not firmly clamped or supported, the impact force may cause unexpected movement or distortion of the tested object, thereby affecting the accuracy and reliability of the test results and making the test data lose its reference value. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an impact test fixture for a composite helicopter deck and a test method thereof, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an impact test tool for a composite helicopter deck, comprising a base and a fixing device, wherein a support frame is fixedly installed on the top of the base, a support groove is opened on the inner wall of the support frame, a support rod is fixedly installed on the top of the inner wall of the support groove, a support plate is slidably installed on the circumferential surface of the support rod, a winding device is provided on the top of the inner wall of the support frame, a steel wire rope is provided inside the winding device, an impact block is slidably installed on the inner wall of the support frame, and one end of the steel wire rope away from the winding device is fixedly connected to the top of the impact block, wherein the fixing device comprises an electric push rod, a clamping plate, a placement groove, a sliding rod, a connecting plate, a hollow T-shaped block, a U-shaped rod and a load-bearing groove, the U-shaped rod moves downward to contact the inner wall of the load-bearing groove and limits the hollow T-shaped block and the clamping plate, and the hollow T-shaped block and the clamping plate are The holding plate is limited by the U-shaped rod and cannot continue to move to squeeze the deck, so that the clamping plate applies an appropriate clamping force to the deck to be inspected, the electric push rod is fixedly passed through the inner and outer walls of the base, the clamping plate is fixedly installed at the output end of the electric push rod, the placement groove is arranged on the side of the clamping plate away from the fixed end of the electric push rod, the sliding rod slides through the inner wall of the placement groove, the connecting plate is fixedly installed on the side of the sliding rod away from the electric push rod, the hollow T-shaped block is slidably installed on the side of the clamping plate close to the fixed end of the electric push rod, the U-shaped rod is slidably installed on the inner wall of the hollow T-shaped block, and the load-bearing groove is arranged at the bottom of the inner wall of the base, wherein the anti-rebound device includes a stabilizing plate, a stabilizing rod and a linkage plate, the stabilizing plate is fixedly installed on the side of the clamping plate away from the connecting plate, the stabilizing rod slides through the upper and lower walls of the stabilizing plate, and the linkage plate is fixedly installed at the bottom of the stabilizing rod.

[0007] According to the above technical solution, a hollow block is fixedly installed on the inner wall of the placement groove, a No. 1 spring is arranged between the support rod and the support plate, and the No. 1 spring can drive the support plate to reset, and a No. 2 spring is arranged between the placement groove and the slide rod, and the No. 2 spring can drive the slide rod to reset.

[0008] According to the above technical solution, a No. 3 spring is arranged between the hollow T-shaped block and the clamping plate, one end of the No. 3 spring is arranged on the side of the clamping plate close to the electric push rod and the other end is arranged on the surface of the hollow T-shaped block. The No. 3 spring can be used to drive the hollow T-shaped block to reset, and a No. 4 spring is arranged between the hollow T-shaped block and the U-shaped rod, one end of the No. 4 spring is arranged on the inner wall of the hollow T-shaped block and the other end is arranged on the surface of the U-shaped rod. The No. 4 spring can be used to manually pull the U-shaped rod upward to reset, and the end of the sliding rod close to the hollow T-shaped block is set as an arc surface.

[0009] According to the above technical solution, it also includes an anti-rebound device and a detection device. The anti-rebound device also includes a shielding plate, a hollow cylinder and a pressing plate. The pressing plate moves downward to drive the shielding plate to move downward to shield the top of both sides of the deck. The hollow cylinder is slidably installed on the circumferential surface of the stabilizing rod, the pressing plate is fixedly installed on the circumferential surface of the hollow cylinder, and the shielding plate is fixedly installed on the top of the pressing plate.

[0010] According to the above technical solution, a protective groove is opened on the circumferential surface of the hollow cylinder, a protective block is fixedly installed on the inner wall of the protective groove, and a rubber block is fixedly installed on the circumferential surface of the stabilizing rod. The pressing plate can only move upward slowly so that the deck cannot rebound excessively when impacted by the impact block.

[0011] According to the above technical solution, a No. 5 spring is arranged between the stabilizing plate and the stabilizing rod, and the No. 5 spring can drive the stabilizing rod to reset. A non-Newtonian fluid is arranged inside the rubber block. The non-Newtonian fluid will solidify instantly when it is squeezed quickly, resulting in the non-Newtonian fluid can only flow by being slowly pushed by the protective block, and the linkage plate is in contact with the hollow T-shaped block.

[0012] According to the above technical scheme, the detection device includes a linkage rod, a detection cylinder, a detection plate, a detection rod, a protection frame, a protection cylinder, a protection plate, a T-shaped rod and a button. The button can be pressed only after the limit of the button is released. When the button is pressed, it drives the winding device to release the wound wire rope. The linkage rod slides through the upper and lower walls of the pressing plate. The detection cylinder is fixedly installed on the top of the pressing plate. The detection plate is slidably installed on the inner wall of the detection cylinder. The detection rod is fixedly installed on the side of the detection plate close to the linkage rod. The protection frame is fixedly installed on the top of the base. The protective cylinder is fixedly installed on the side of the protection frame close to the electric push rod. The protective plate is slidably installed on the inner wall of the protective cylinder. The T-shaped rod is fixedly installed on the side of the protective plate away from the electric push rod. The button is fixedly installed on the top of the base. The button is electrically connected to the winding device, and the detection cylinder is connected to the inside of the protective cylinder through a hose.

[0013] According to the above technical solution, liquid is arranged inside the detection cylinder, a protective groove is opened on the surface of the button, the T-shaped rod is in contact with the protective groove, a No. 6 spring is arranged between the linkage rod and the pressing plate, one end of the No. 6 spring is arranged at the bottom of the pressing plate and the other end is arranged on the surface of the linkage rod, the No. 6 spring can drive the linkage rod to reset, and the elastic coefficient of the No. 5 spring is greater than that of the No. 6 spring.

[0014] A testing method for an impact testing tool for a composite helicopter deck comprises the following steps:

[0015] Step 1: After placing the deck to be inspected into the inner wall of the base, the electric push rod drives the clamping plate and the slide rod to move, and the movement of the slide rod drives the connection plate to move;

[0016] Step 2: The connecting plate moves to contact the deck and squeeze the deck. At the same time, the connecting plate is subjected to the reaction force of squeezing the deck and moves toward the fixed end of the electric push rod, driving the sliding rod to move;

[0017] Step 3: The sliding rod moves to contact the hollow T-shaped block and squeeze the hollow T-shaped block. The hollow T-shaped block moves downward due to the squeezing of the sliding rod, driving the U-shaped rod to move downward;

[0018] Step 4: The U-shaped rod moves downward to contact the inner wall of the load-bearing groove and limit the hollow T-shaped block and the clamping plate. The hollow T-shaped block and the clamping plate cannot move further due to the limitation of the U-shaped rod, so that the clamping plate applies appropriate clamping force to the deck to be inspected;

[0019] Step 5: After the deck to be inspected is fixed, the winding device is operated to release the wound wire rope. After the winding device releases the wound wire rope, the support plate moves downward rapidly under the elastic force of spring No. 1, driving the impact block to move. The impact block moves downward rapidly to impact the deck to be inspected.

[0020] The present invention provides an impact test tool for composite helicopter decks, which has the following beneficial effects:

[0021] (1) The invention, by limiting the hollow T-shaped block and the clamping plate by the U-shaped rod and being unable to move further to squeeze the deck, enables the clamping plate to apply appropriate clamping force to the deck to be tested. The appropriate clamping force can simulate the fixing and supporting conditions of the deck in actual use, ensuring that the test conditions are as close to the actual scene as possible. In addition, the correct application of the clamping force can prevent the composite deck from being deformed other than by impact due to inappropriate clamping force during the test, thereby ensuring the accuracy of the impact test results. At the same time, the vibration of the hollow block drives the clamping plate to resonate and shake off the deck fragments remaining on the clamping plate. The remaining fragments will cause uneven distribution of the clamping force in subsequent tests, affecting the close contact between the deck and the clamping plate. By shaking off the fragments, the surface of the clamping plate can be ensured to be clean and flat, which is conducive to maintaining the reliability of subsequent clamping operations.

[0022] (2) The invention shields the top of both sides of the deck by driving the shielding plate to move downward by the downward movement of the pressing plate. Shielding the top can shield the splashes or debris generated during the impact test, thereby protecting the safety of the test equipment and testers and preventing damage to the test equipment and personnel caused by splashes of deck debris during the impact test. At the same time, the hollow cylinder can only move upward slowly, so that the pressing plate can only move upward slowly. The pressing plate can only move upward slowly, so that the deck cannot rebound excessively when impacted by the impact block. Preventing the deck from rebounding can reduce the impact and stress on the impact test equipment and avoid the distortion of measurement data or inaccurate test results caused by excessive rebound.

[0023] (3) In this invention, the T-shaped rod moves out of contact with the protective groove and releases the limit on the button. The button can be pressed only after the limit on the button is released. When the button is pressed, the winding device is driven to release the wound wire rope. Only by conducting the impact test on a fixed and stable deck can the consistency and repeatability of the test conditions be guaranteed, and the test results can be ensured to be authentic. In addition, ensuring that the deck is fixed and stable and the anti-rebound device is set up before the impact test can be carried out can effectively reduce safety risks and further protect the safety of testers. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the position structure of the support frame and the winding device of the present invention;

[0026] Figure 3 This is a schematic diagram of the position structure of the electric push rod and the base of the present invention;

[0027] Figure 4 This is a schematic diagram of the position structure of the shielding plate and the pressing plate of the present invention;

[0028] Figure 5 This is a schematic diagram of the position structure of the hollow cylinder and the pressing plate of the present invention;

[0029] Figure 6 For the present invention Figure 5 A schematic diagram of the structure enlargement of part A;

[0030] Figure 7 For the present invention Figure 3 A schematic diagram of the structure of part B in the middle is enlarged;

[0031] Figure 8 It is a schematic diagram of the position structure of the detection tube and the detection plate of the present invention.

[0032] In the figure: 1. base; 2. support frame; 3. support rod; 4. support plate; 5. winding device; 6. impact block; 7. wire rope; 8. electric push rod; 9. clamping plate; 10. placement groove; 11. slide rod; 12. connecting plate; 13. hollow T-shaped block; 14. U-shaped rod; 15. hollow block; 161. stabilizing plate; 162. stabilizing rod; 163. linkage plate; 164. shielding plate; 165. hollow cylinder; 166. pressing plate; 167. protection groove; 168. protection block; 169. rubber block; 171. linkage rod; 172. detection cylinder; 173. detection plate; 174. detection rod; 175. protection frame; 176. protection cylinder; 177. protection plate; 178. T-shaped rod; 179. button; 18. load-bearing groove. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 8 , one embodiment of the present invention is: an impact test tool for a composite helicopter deck, comprising a base 1, and also comprising a fixing device, wherein a support frame 2 is fixedly installed on the top of the base 1, a support groove is opened on the inner wall of the support frame 2, a support rod 3 is fixedly installed on the top of the inner wall of the support groove, a support plate 4 is slidably installed on the circumferential surface of the support rod 3, a winding device 5 is arranged on the top of the inner wall of the support frame 2, a steel wire rope 7 is arranged inside the winding device 5, an impact block 6 is slidably installed on the inner wall of the support frame 2, and one end of the steel wire rope 7 away from the winding device 5 is fixedly connected to the top of the impact block 6, wherein the fixing device comprises an electric push rod 8, a clamping plate 9, a placement groove 10, a sliding rod 11, a connecting plate 12, a hollow T-shaped block 13, a U-shaped rod 14 and a load-bearing groove 18, the electric push rod 8 is fixedly passed through the inner and outer walls of the base 1, the clamping plate 9 is fixedly installed on the output end of the electric push rod 8, the placement groove 10 is opened It is arranged on the side of the clamping plate 9 away from the fixed end of the electric push rod 8, the sliding rod 11 slides through the inner wall of the placement groove 10, the connecting plate 12 is fixedly installed on the side of the sliding rod 11 away from the electric push rod 8, the hollow T-shaped block 13 is slidably installed on the side of the clamping plate 9 close to the fixed end of the electric push rod 8, the U-shaped rod 14 is slidably installed on the inner wall of the hollow T-shaped block 13, and the load-bearing groove 18 is opened at the bottom of the inner wall of the base 1, wherein the anti-rebound device includes a stabilizing plate 161, a stabilizing rod 162 and a linkage plate 163, the stabilizing plate 161 is fixedly installed on the side of the clamping plate 9 away from the connecting plate 12, the stabilizing rod 162 slides through the upper and lower walls of the stabilizing plate 161, and the linkage plate 163 is fixedly installed at the bottom of the stabilizing rod 162. The correct application of the clamping force can prevent the composite material deck from being deformed other than the impact due to inappropriate clamping force during the test, thereby ensuring the accuracy of the impact test results.

[0035] A hollow block 15 is fixedly installed on the inner wall of the placement groove 10, and a No. 1 spring is arranged between the support rod 3 and the support plate 4, and the No. 1 spring can drive the support plate 4 to reset. A No. 2 spring is arranged between the placement groove 10 and the slide rod 11, and the No. 2 spring can drive the slide rod 11 to reset. By shaking off the debris, the surface of the clamping plate 9 can be kept clean and flat, which is conducive to maintaining the reliability of subsequent clamping operations.

[0036] A No. 3 spring is arranged between the hollow T-shaped block 13 and the clamping plate 9, one end of the No. 3 spring is arranged on the side of the clamping plate 9 close to the electric push rod 8 and the other end is arranged on the surface of the hollow T-shaped block 13. The No. 3 spring can be used to drive the hollow T-shaped block 13 to reset. A No. 4 spring is arranged between the hollow T-shaped block 13 and the U-shaped rod 14, one end of the No. 4 spring is arranged on the inner wall of the hollow T-shaped block 13 and the other end is arranged on the surface of the U-shaped rod 14. The No. 4 spring can be used to manually pull the U-shaped rod 14 upward to reset, and the end of the sliding rod 11 close to the hollow T-shaped block 13 is set as an arc surface.

[0037] When the present embodiment is working, after the deck to be inspected is placed into the inner wall of the base 1, the electric push rod 8 drives the clamping plate 9 to move in the direction close to the deck, the clamping plate 9 moves in the direction close to the deck and drives the sliding rod 11 to move, the sliding rod 11 moves and drives the connecting plate 12 to move, the connecting plate 12 moves and contacts with the deck and squeezes the deck, and at the same time, the connecting plate 12 is subjected to the reaction force of squeezing the deck and moves in the direction close to the fixed end of the electric push rod 8, the connecting plate 12 moves in the direction close to the fixed end of the electric push rod 8 and drives the sliding rod 11 to move, the sliding rod 11 moves and contacts with the hollow T-shaped block 13 and squeezes the hollow T-shaped block 13, the hollow T-shaped block 13 is squeezed downward by the sliding rod 11, the hollow T-shaped block 13 moves downward and drives the U-shaped rod 14 to move downward, and the U-shaped rod 14 moves downward. The hollow T-shaped block 13 and the clamping plate 9 are limited by the U-shaped rod 14 and cannot continue to move to squeeze the deck, so that the clamping plate 9 applies an appropriate clamping force to the deck to be inspected. At the same time, the connecting plate 12 moves toward the direction close to the fixed end of the electric push rod 8 and hits the hollow block 15 to generate vibration. The vibration of the hollow block 15 drives the clamping plate 9 to resonate and vibrate off the deck fragments remaining on the clamping plate 9. After the deck to be inspected is fixed, the winding device 5 operates to release the wound wire rope 7. After the winding device 5 releases the wound wire rope 7, the support plate 4 moves downward rapidly under the elastic force of the No. 1 spring. The support plate 4 moves downward rapidly and drives the impact block 6 to move downward rapidly to impact the deck to be inspected.

[0038] See also Figure 1-Figure 8 On the basis of the above embodiment, another embodiment of the present invention further includes an anti-rebound device and a detection device, the anti-rebound device also includes a shielding plate 164, a hollow cylinder 165 and a pressing plate 166, the hollow cylinder 165 is slidably installed on the circumferential surface of the stabilizing rod 162, the pressing plate 166 is fixedly installed on the circumferential surface of the hollow cylinder 165, the shielding plate 164 is fixedly installed on the top of the pressing plate 166, and the shielding top can shield the splashes or fragments generated during the impact test, thereby protecting the safety of the test equipment and testers.

[0039] A protective groove 167 is provided on the circumferential surface of the hollow cylinder 165, a protective block 168 is fixedly installed on the inner wall of the protective groove 167, and a rubber block 169 is fixedly installed on the circumferential surface of the stabilizing rod 162 to prevent the deck from rebounding, thereby reducing the impact and stress on the impact test equipment and avoiding the distortion of measurement data or inaccurate test results caused by excessive rebound.

[0040] A No. 5 spring is arranged between the stabilizing plate 161 and the stabilizing rod 162, and the No. 5 spring can drive the stabilizing rod 162 to reset. A non-Newtonian fluid is arranged inside the rubber block 169. The non-Newtonian fluid will solidify instantly when it is squeezed quickly, resulting in the non-Newtonian fluid only being slowly pushed by the protective block 168 to make it flow. The linkage plate 163 is in contact with the hollow T-shaped block 13.

[0041] The detection device includes a linkage rod 171, a detection tube 172, a detection plate 173, a detection rod 174, a protection frame 175, a protection tube 176, a protection plate 177, a T-shaped rod 178 and a button 179. The linkage rod 171 slides through the upper and lower walls of the pressing plate 166, the detection tube 172 is fixedly mounted on the top of the pressing plate 166, the detection plate 173 is slidably mounted on the inner wall of the detection tube 172, the detection rod 174 is fixedly mounted on the side of the detection plate 173 close to the linkage rod 171, the protection frame 175 is fixedly mounted on the top of the base 1, and the protection tube 176 is fixedly mounted on the inner wall of the detection tube 172. 76 is fixedly mounted on the side of the protection frame 175 close to the electric push rod 8, the protection plate 177 is slidably mounted on the inner wall of the protection tube 176, the T-bar 178 is fixedly mounted on the side of the protection plate 177 away from the electric push rod 8, the button 179 is fixedly mounted on the top of the base 1, the button 179 is electrically connected to the winding device 5, and the detection tube 172 is connected to the inside of the protection tube 176 through a hose. It is ensured that the deck is fixed and stable and the impact test can be carried out only after the anti-rebound device is set up, which can effectively reduce safety risks and further protect the safety of testers.

[0042] Liquid is arranged inside the detection cylinder 172, a protective groove is opened on the surface of the button 179, the T-shaped rod 178 is in contact with the protective groove, a No. 6 spring is arranged between the linkage rod 171 and the pressing plate 166, one end of the No. 6 spring is arranged at the bottom of the pressing plate 166 and the other end is arranged on the surface of the linkage rod 171, the No. 6 spring can drive the linkage rod 171 to reset, and the elastic coefficient of the No. 5 spring is greater than that of the No. 6 spring.

[0043] When the present embodiment is working, the hollow T-shaped block 13 is squeezed by the slide bar 11 and moves downward, the hollow T-shaped block 13 moves downward and contacts the linkage plate 163 and squeezes the linkage plate 163 to move downward, the linkage plate 163 moves downward and drives the stabilizing rod 162 to move downward, the stabilizing rod 162 moves downward and drives the hollow cylinder 165 to move downward, the hollow cylinder 165 moves downward and drives the pressing plate 166 to move downward and contact the top of the deck to be tested, and at the same time, the pressing plate 166 moves downward and drives the shielding plate 164 to move downward to shield the top of both sides of the deck to prevent the splashing of the deck debris during the impact penetration and cause damage to the test equipment and personnel. If the deck is rebounded by the excessive impact force of the impact block 6, the deck will be damaged. The plate rebounds upward and drives the pressing plate 166 to move upward quickly. The pressing plate 166 moves upward and drives the hollow cylinder 165 to move upward. The hollow cylinder 165 moves upward and drives the protective block 168 to move upward. The protective block 168 moves upward and contacts the rubber block 169 and squeezes the rubber block 169. The rubber block 169 is squeezed by the protective block 168 and can only deform slowly. The rubber block 169 can only deform slowly, so that the protective block 168 and the hollow cylinder 165 can only move upward slowly. The hollow cylinder 165 can only move upward slowly, so that the pressing plate 166 can only move upward slowly. The pressing plate 166 can only move upward slowly, so that the deck cannot rebound excessively when impacted by the impact block 6.

[0044] The hollow cylinder 165 moves downward, driving the pressing plate 166 to move downward. The pressing plate 166 moves downward, driving the linkage rod 171 to move downward. The linkage rod 171 moves downward, contacts the top of the deck and squeezes the top of the deck. At the same time, the linkage rod 171 is subjected to the reaction force of squeezing the deck and moves upward to contact the detection rod 174 and squeeze the detection rod 174. The detection rod 174 is squeezed by the linkage rod 171 and moves toward the direction close to the electric push rod 8. The movement of the detection rod 174 drives the detection plate 173 to move. The movement of the detection plate 173 squeezes the liquid inside the detection cylinder 172. The liquid inside the detection cylinder 172 The liquid inside the protective tube 176 squeezes the protective plate 177, and the protective plate 177 moves away from the electric push rod 8 due to the squeeze of the liquid inside the protective tube 176. The protective plate 177 moves away from the electric push rod 8 and drives the T-shaped rod 178 to move. The T-shaped rod 178 moves out of contact with the protective groove and releases the limit on the button 179. The button 179 can be pressed only after the limit on the button 179 is released. When the button 179 is pressed, the winding device 5 is driven to release the wound wire rope 7.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An impact test fixture for a composite helicopter deck, comprising a base (1), characterized in that: It also includes a fixing device, an anti-rebound device and a detection device; A support frame (2) is fixedly mounted on the top of the base (1), a support groove is formed on the inner wall of the support frame (2), a support rod (3) is fixedly mounted on the top of the inner wall of the support groove, a support plate (4) is slidably mounted on the circumferential surface of the support rod (3), a winding device (5) is arranged on the top of the inner wall of the support frame (2), a steel wire rope (7) is arranged inside the winding device (5), an impact block (6) is slidably mounted on the inner wall of the support frame (2), and one end of the steel wire rope (7) away from the winding device (5) is fixedly connected to the top of the impact block (6); The fixing device comprises an electric push rod (8), a clamping plate (9), a placement groove (10), a slide bar (11), a connecting plate (12), a hollow T-shaped block (13), a U-shaped rod (14) and a load-bearing groove (18); the electric push rod (8) is fixedly installed through the inner and outer walls of the base (1); the clamping plate (9) is fixedly installed at the output end of the electric push rod (8); the placement groove (10) is arranged on a side of the clamping plate (9) away from the fixed end of the electric push rod (8); the slide bar (11) slides through the inner wall of the placement groove (10); the connecting plate (12) is fixedly installed on a side of the slide bar (11) away from the electric push rod (8); the hollow T-shaped block (13) is slidably installed on a side of the clamping plate (9) close to the fixed end of the electric push rod (8); the U-shaped rod (14) is slidably installed on the inner wall of the hollow T-shaped block (13); and the load-bearing groove (18) is arranged at the bottom of the inner wall of the base (1); The anti-rebound device comprises a stabilizing plate (161), a stabilizing rod (162) and a linkage plate (163); the stabilizing plate (161) is fixedly mounted on a side of the clamping plate (9) away from the connecting plate (12); the stabilizing rod (162) slides through the upper and lower walls of the stabilizing plate (161); and the linkage plate (163) is fixedly mounted on the bottom of the stabilizing rod (162); The U-shaped rod (14) moves downward to contact the inner wall of the load-bearing groove (18) and limit the hollow T-shaped block (13) and the clamping plate (9); The anti-rebound device further comprises a shielding plate (164), a hollow cylinder (165) and a pressing plate (166); the hollow cylinder (165) is slidably mounted on the circumferential surface of the stabilizing rod (162); the pressing plate (166) is fixedly mounted on the circumferential surface of the hollow cylinder (165); and the shielding plate (164) is fixedly mounted on the top of the pressing plate (166); The circumferential surface of the hollow cylinder (165) is provided with a protection groove (167), the inner wall of the protection groove (167) is fixedly mounted with a protection block (168), the circumferential surface of the stabilizing rod (162) is fixedly mounted with a rubber block (169), and a non-Newtonian fluid is disposed inside the rubber block (169).

2. The impact test tool for composite helicopter deck according to claim 1, characterized in that: A hollow block (15) is fixedly mounted on the inner wall of the placement groove (10), a No. 1 spring is arranged between the support rod (3) and the support plate (4), and a No. 2 spring is arranged between the placement groove (10) and the slide rod (11).

3. The impact test tool for composite helicopter deck according to claim 2, characterized in that: A No. 3 spring is arranged between the hollow T-shaped block (13) and the clamping plate (9), a No. 4 spring is arranged between the hollow T-shaped block (13) and the U-shaped rod (14), and one end of the sliding rod (11) close to the hollow T-shaped block (13) is arranged as an arc surface.

4. The impact test tool for composite helicopter deck according to claim 3, characterized in that: A No. 5 spring is provided between the stabilizing plate (161) and the stabilizing rod (162), and the linkage plate (163) is in contact with the hollow T-shaped block (13).

5. The impact test tool for composite helicopter deck according to claim 4, characterized in that: The detection device comprises a linkage rod (171), a detection cylinder (172), a detection plate (173), a detection rod (174), a protection frame (175), a protection cylinder (176), a protection plate (177), a T-shaped rod (178) and a button (179); the linkage rod (171) slides through the upper and lower walls of the pressing plate (166); the detection cylinder (172) is fixedly mounted on the top of the pressing plate (166); the detection plate (173) is slidably mounted on the inner wall of the detection cylinder (172); and the detection rod (174) is fixedly mounted on the detection plate (173) near the linkage rod (171). ), the protective frame (175) is fixedly mounted on the top of the base (1), the protective tube (176) is fixedly mounted on the side of the protective frame (175) close to the electric push rod (8), the protective plate (177) is slidably mounted on the inner wall of the protective tube (176), the T-shaped rod (178) is fixedly mounted on the side of the protective plate (177) away from the electric push rod (8), the button (179) is fixedly mounted on the top of the base (1), the button (179) is electrically connected to the winding device (5), and the detection tube (172) is connected to the inside of the protective tube (176) through a hose.

6. The impact test tool for composite helicopter deck according to claim 5, characterized in that: Liquid is disposed inside the detection cylinder (172), a protective groove is provided on the surface of the button (179), the T-shaped rod (178) is in contact with the protective groove, and a No. 6 spring is disposed between the linkage rod (171) and the pressing plate (166).

7. The testing method of the impact testing tool for composite helicopter deck according to claim 6, characterized in that: The following steps are involved: Step 1: After the deck to be inspected is placed into the inner wall of the base (1), the electric push rod (8) drives the clamping plate (9) and the sliding rod (11) to move, and the movement of the sliding rod (11) drives the connecting plate (12) to move; Step 2: The connecting plate (12) moves to contact the deck and squeeze the deck, and at the same time, the connecting plate (12) is subjected to the reaction force of squeezing the deck and moves in a direction close to the fixed end of the electric push rod (8), driving the sliding rod (11) to move; Step 3: The slide bar (11) moves to contact the hollow T-shaped block (13) and squeezes the hollow T-shaped block (13). The hollow T-shaped block (13) is squeezed by the slide bar (11) and moves downward, driving the U-shaped bar (14) to move downward; Step 4: The U-shaped rod (14) moves downward to contact the inner wall of the load-bearing groove (18) and limits the hollow T-shaped block (13) and the clamping plate (9). The hollow T-shaped block (13) and the clamping plate (9) are limited by the U-shaped rod (14) and cannot move further, so that the clamping plate (9) applies an appropriate clamping force to the deck to be inspected; Step 5: After the deck to be inspected is fixed, the reeling device (5) operates to release the reeled steel wire rope (7). After the reeling device (5) releases the reeled steel wire rope (7), the support plate (4) moves downward rapidly under the elastic force of the first spring, driving the impact block (6) to move. The impact block (6) moves downward rapidly to impact the deck to be inspected.

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