Composite material compression testing machine capable of preventing eccentricity

Abstract

The invention relates to the technical field of compression testing machines, in particular to an anti-eccentricity composite material compression testing machine which comprises a base and a supporting table, and the supporting table is mounted at the top end of the base; the top end of the hydraulic cylinder is installed on the base through the supporting device, the supporting device is used for driving the hydraulic cylinder to move and adjust, the pressure plate is installed at the moving end of the hydraulic cylinder, and the pressure plate and the supporting table are oppositely arranged up and down. The side plates are circumferentially arranged on the side of the supporting table, the pressure sensors are installed on the outer side walls of the side plates respectively, and the pressure sensors are installed on the base through a moving device; eccentric bending in the composite material compression process is reduced, the situation that the composite material pops up to one side under pressure after eccentric bending is avoided, the test safety is improved, meanwhile, eccentric correction is facilitated, and the composite material compression test accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of compression testing machines, in particular to a composite material compression testing machine capable of preventing eccentricity. Background Art

[0002] Composite materials are materials composed of reinforcement and matrix. Due to their light weight, high strength and high rigidity, they are widely used in aerospace, military and automotive industries. In order to gain a deeper understanding and optimize the performance and behavior of composite materials under compression conditions, compression tests are usually performed on composite materials.

[0003] Currently, in the existing compression testing equipment, such as the patent with authorization announcement number CN205157303U, the utility model relates to a compression testing machine, which includes a fixed frame, a support platform arranged on the fixed frame, a cylinder stage arranged on the fixed frame and a pressure head connected to the cylinder, and the centers of the support platform, the cylinder and the pressure head are located in the same vertical direction, which effectively reduces the space occupancy and has a small volume.

[0004] However, during the use of the testing machine, it was found that the anti-eccentricity effect of the testing machine was poor, and the material was prone to eccentricity during the compression process, thereby reducing the accuracy of the compression test on the material and reducing the safety of the material compression test. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a composite material compression testing machine that reduces eccentric bending during the compression process of the composite material, avoids the composite material from bouncing to one side under pressure after eccentric bending, improves the safety of the test, and facilitates eccentric correction to improve the accuracy of the composite material compression test.

[0006] The present invention discloses a composite material compression testing machine for preventing eccentricity, comprising a base and a support platform, wherein the support platform is mounted on the top of the base; further comprising a supporting device, a moving device, a hydraulic cylinder, a pressure plate, a plurality of side plates and a plurality of pressure sensors, wherein the top of the hydraulic cylinder is mounted on the base through the supporting device, the supporting device is used to drive the hydraulic cylinder to move and adjust, the pressure plate is mounted on the moving end of the hydraulic cylinder, and the pressure plate and the support platform are arranged relative to each other up and down, the plurality of side plates are arranged circumferentially on the side of the support platform, the plurality of pressure sensors are respectively mounted on the outer side walls of the plurality of side plates, the plurality of pressure sensors are mounted on the base through the moving device, and the moving device is used to drive the plurality of pressure sensors to move in opposite directions; the composite material to be compressed is prepared into a cylindrical shape, and the diameter of the composite material is made larger than the diameter of the support platform, and then the composite material is placed in the middle of the top of the support platform, and the plurality of pressure sensors are driven to move and adjust in opposite directions through the moving device, so that the plurality of pressure sensors drive the plurality of side plates to contact the outer side walls of the composite material, and the pressure plate is driven downward by the hydraulic cylinder so that the bottom end of the pressure plate contacts the top of the composite material and the top of the plurality of side plates, and then the hydraulic cylinder is driven downward by the supporting device so that the hydraulic cylinder drives the pressure plate to move downward. The force plate moves downward to perform a compression test on the composite material. When the pressure plate compresses the composite material downward, it pushes the multiple sets of side plates to move downward, so that the multiple sets of side plates always limit and protect the four sides of the composite material, reduce the eccentric bending during the compression of the composite material, and avoid the composite material from being ejected to one side under pressure after being eccentrically bent, thereby improving the safety of the test. When the composite material is compressed and squeezed to expand laterally, the composite material applies a lateral expansion driving force to the multiple sets of side plates, and the driving force is sensed by multiple sets of pressure sensors, so that it is easy to control the moving device to drive the multiple sets of side plates to move away from each other in coordination with the expansion of the composite material. At the same time, by sensing the driving force and controlling the moving speed of the multiple sets of side plates, the multiple sets of side plates are always kept in a certain contact state with the side of the composite material, effectively reducing the eccentric bending when the composite material is compressed. When the multiple sets of pressure sensors sense that one set of side plates is subjected to a large driving force, it means that the composite material is eccentric toward its side plate position. At this time, the hydraulic cylinder is driven to move horizontally through the support device, so that the pressure plate moves in the opposite direction of the eccentricity, thereby correcting the eccentricity and improving the accuracy of the compression test of the composite material.

[0007] Preferably, the supporting device includes a driving device, an adjusting device, a bracket, a guide column, a supporting plate, a guide groove, a slider, a first lead screw and a first motor. The bracket is mounted on the top of the base, the guide column is slidably mounted on the bracket up and down, the top of the supporting plate is connected to the bottom of the guide column, and the supporting plate moves up and down through the driving device, the guide groove is rotatably mounted on the bottom of the supporting plate, a level adjusting device is provided on the supporting plate, the adjusting device is used to drive the guide groove to rotate, the slider is slidably mounted on the guide groove, the top of the hydraulic cylinder is connected to the top of the slider, the first lead screw is rotatably mounted on the inner side wall of the guide groove, the slider is screwed on the first lead screw, and the first motor is mounted on the outside of the guide groove The output end of the first motor is connected to the first lead screw; the support plate is driven downward by the driving device, so that the support plate drives the guide groove to move downward, and the guide groove drives the hydraulic cylinder to move downward through the slider, thereby improving the convenience of the pressure plate for composite material extrusion test; when the composite material is eccentric, the guide groove is driven to rotate horizontally to adjust the direction through the adjusting device, and the first lead screw is driven to rotate by the first motor at the same time. After the first lead screw rotates, it drives the slider to move horizontally, so that the slider drives the hydraulic cylinder to move horizontally, thereby improving the convenience of the pressure plate moving in the opposite direction of the eccentricity of the composite material, and improving the convenience of correcting different eccentric directions of the composite material.

[0008] Preferably, the mobile device includes a power device, multiple groups of support arms, multiple groups of connecting parts, multiple groups of first telescopic rods, multiple groups of first springs, multiple groups of connecting arms and a base, the multiple groups of support arms are all slidably installed on the base, the multiple groups of connecting parts are respectively slidably installed up and down at the front ends of the multiple groups of support arms, the multiple groups of pressure sensors are respectively installed on the outer side walls of the multiple groups of connecting parts, the multiple groups of first telescopic rods are respectively installed on the outer side walls of the multiple groups of support arms, the top ends of the multiple groups of first telescopic rods are respectively connected to the outer side walls of the multiple groups of connecting parts, the multiple groups of first springs are respectively installed on the outer side walls of the multiple groups of first telescopic rods, the top ends of the multiple groups of connecting arms are respectively rotatably connected to the bottom ends of the multiple groups of support arms, and the bottom ends of the multiple groups of connecting arms are all rotatably installed on the base A power device is arranged on the outer wall and the base, and the power device is used to drive the base to move up and down; when the composite material is placed on the top of the support platform, the power device drives the base to move downward, so that the base drives the multiple groups of support arms to move closer to each other through the multiple groups of connecting arms, thereby the multiple groups of support arms drive the multiple groups of side panels to move closer to each other and contact the composite material; when the composite material is compressed and expanded laterally, the power device drives the base to move upward, and after the base moves upward, the multiple groups of side panels are moved away from each other, thereby improving the convenience of the multiple groups of side panels to cooperate with the expansion and movement of the composite material, reducing the influence of the multiple groups of side panels on the compression test of the composite material, and improving the accuracy of the test and the convenience of operation.

[0009] Preferably, the power device includes a sliding device, a second lead screw, a first worm gear, a first worm, a first friction plate, a second friction plate, a spline sleeve, a spline shaft and a second motor. The second lead screw is rotatably mounted on the outer side wall of the base at the upper and lower ends, the first worm gear is mounted on the outer side wall of the second lead screw, the base is screwed on the outer side wall of the second lead screw, the first worm is rotatably mounted on the outer side wall of the base, the first worm is meshed with the first worm gear, the first friction plate is mounted on the end of the first worm, the second friction plate is mounted on the end of the spline sleeve, the spline sleeve is mounted on the outer side wall of the spline shaft, the spline shaft is mounted on the moving end of the second motor, the second motor is mounted on the outer side wall of the base, and the output end of the second motor is connected to the driving device. A sliding device is provided on the base, and the sliding device is used to drive the spline sleeve to move and adjust; the spline shaft is driven to rotate by the second motor, so that the spline shaft drives the spline sleeve to rotate. By making the second friction plate contact with the first friction plate, when the spline sleeve drives the second friction plate to rotate, the second friction plate drives the first friction plate to rotate, so that the first friction plate drives the first worm to rotate, and the first worm drives the second lead screw to rotate by meshing with the first worm wheel, so that the second lead screw drives the base to move up and down, and the spline sleeve is driven to move and adjust by the sliding device, so that the contact between the second friction plate and the first friction plate is controlled, when there is no lateral expansion when the composite material is compressed, the second friction plate is separated from the first friction plate, and when the material is compressed and expanded, the second friction plate contacts the first friction plate, so that the multiple groups of side plates move away from each other, and the second motor provides power to the drive device while rotating, so that the drive device drives the pressure plate to move downward to compress the composite material, thereby improving the control and adjustment convenience of the composite material compression test and preventing eccentricity.

[0010] Preferably, the driving device includes a stud, a second worm wheel, a second worm, a first sprocket, a second sprocket and a chain, the bottom end of the stud is fixedly connected to the top end of the support plate, the second worm wheel is rotatably mounted on the top end of the bracket, and the second worm wheel is screwed on the outer wall of the stud, the second worm wheel is rotatably mounted on the outer wall of the bracket, the second worm is meshed with the second worm wheel, the first sprocket is mounted on the end of the second worm wheel, the second sprocket is mounted on the other output end of the second motor, and the chain is mounted on the outer walls of the first sprocket and the second sprocket; after the second motor is started, it drives the second sprocket and the spline shaft to rotate, so that the spline shaft provides power for the movement of multiple groups of side plates, and after the second sprocket rotates, it drives the second worm to rotate through the chain and the first sprocket, and after the second worm rotates, it drives the second worm wheel to rotate, so that the second worm wheel drives the stud to move up and down, thereby improving the convenience of lifting and moving the pressure plate.

[0011] Preferably, the sliding device includes an electric cylinder, a second telescopic rod, a second spring and a support block, the electric cylinder is installed on the outer wall of the base, the second telescopic rod is installed on the moving end of the electric cylinder, the second spring is cooperatively installed on the outer wall of the second telescopic rod, the support block is slidably installed on the base, the support block is connected to the end of the second telescopic rod, and the spline sleeve is rotatably installed on the support block; through the telescopic adjustment of the moving end of the electric cylinder, the electric cylinder drives the support block to move through the second telescopic rod, so that the support block drives the spline sleeve to move, thereby improving the convenience of separation control between the second friction plate and the first friction plate.

[0012] Preferably, the adjusting device includes a gear ring, a gear and a third motor, the gear ring is mounted on the outer wall of the guide groove, the gear is meshed with the gear ring, the third motor is mounted on the outer wall of the support plate, and the output end of the third motor is connected to the gear; the gear is driven to rotate by the third motor, and the gear drives the guide groove to rotate by meshing with the gear ring, thereby improving the convenience of horizontal movement of the pressure plate in different directions.

[0013] Preferably, it also includes multiple groups of third telescopic rods, which are all installed on the top of the base, and the tops of the multiple groups of third telescopic rods are all connected to the outer side wall of the base; by setting up multiple groups of third telescopic rods, the stability of the lifting and lowering movement of the base is improved.

[0014] Preferably, it also includes a protective cover, which is installed on the outer side wall of the base and is installed outside the first sprocket, the second sprocket and the chain to improve the protection effect of the first sprocket, the second sprocket and the chain.

[0015] Preferably, a sensor assembly is provided at the bottom of the support platform to improve the convenience of measuring composite material compression test data.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the composite material that needs to be compressed is prepared into a cylindrical shape, and the diameter of the composite material is made larger than the diameter of the support platform; the composite material is then placed in the middle of the top end of the support platform, and multiple groups of pressure sensors are driven by a moving device to move and adjust in opposite directions, so that the multiple groups of pressure sensors drive multiple groups of side plates to contact the outer side wall of the composite material; the pressure plate is driven downward by a hydraulic cylinder to make the bottom end of the pressure plate contact the top end of the composite material and the top ends of the multiple groups of side plates; then, the hydraulic cylinder is driven downward by the supporting device to drive the hydraulic cylinder to move downward to perform a compression test on the composite material; when the pressure plate compresses the composite material downward, it pushes the multiple groups of side plates to move downward, so that the multiple groups of side plates always limit and protect the composite material on all sides, reduce the eccentric bending during the compression of the composite material, and avoid the composite material from being damaged after eccentric bending. The pressure pops out to one side, which improves the safety of the test. When the composite material is compressed and squeezed to expand laterally, the composite material applies a lateral expansion force to multiple sets of side plates. The driving force is sensed by multiple sets of pressure sensors, so that it is easy to control the moving device to drive the multiple sets of side plates to move away from each other in coordination with the expansion of the composite material. At the same time, by sensing the size of the driving force and controlling the moving speed of the multiple sets of side plates, the multiple sets of side plates are always kept in a certain contact state with the side of the composite material, effectively reducing the eccentric bending of the composite material when compressed. When the multiple sets of pressure sensors sense that one of the side plates is subjected to a larger driving force, it indicates that the composite material is eccentric toward its side plate position. At this time, the hydraulic cylinder is driven to move horizontally through the support device, so that the pressure plate moves in the opposite direction of the eccentricity, thereby correcting the eccentricity and improving the accuracy of the compression test of the composite material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the axonometric structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the axonometric local structure of the connection between the side plate and the pressure sensor, etc.;

[0019] Figure 3 is an isometric partial structural diagram of the connection between the first telescopic rod and the first spring, etc.;

[0020] Figure 4 It is a schematic diagram of the axonometric local structure of the connection between the connecting arm and the base, etc.;

[0021] Figure 5 It is a schematic diagram of the axonometric local structure of the connection between the guide groove and the slider;

[0022] Figure 6 It is a schematic diagram of the partial axonometric structure of the connection between the second lead screw and the first worm gear;

[0023] Figure 7It is a schematic diagram of the partial axonometric structure of the connection between the hydraulic cylinder and the pressure plate;

[0024] Figure 8 is an isometric partial structural diagram of the connection between the second motor and the second sprocket etc.;

[0025] Fig. 9 It is a schematic diagram of the axonometric partial structure of the connection between the stud and the second worm gear, etc.;

[0026] Fig.10 It is a schematic diagram of the axonometric partial structure of the connection between the base and the third telescopic rod, etc.;

[0027] Fig.11 It is a schematic diagram of the axonometric partial structure of the connection between the gear and the third motor, etc.;

[0028] Fig.12 It is a schematic diagram of the axonometric local structure of the connection between the support arm and the connecting arm;

[0029] Fig.13 It is a physical diagram of the present invention.

[0030] Markings in the accompanying drawings: 101, base; 102, support platform; 103, hydraulic cylinder; 104, pressure plate; 105, side plate; 106, pressure sensor; 201, bracket; 202, guide column; 203, support plate; 204, guide groove; 205, slider; 206, first screw; 207, first motor; 301, support arm; 302, connecting piece; 303, first telescopic rod; 304, first spring; 305, connecting arm; 306, base; 401, second screw; 402, first worm gear; 403, first worm; 404, first friction plate; 405, second friction plate; 406, spline sleeve; 407, spline shaft; 408, second motor; 501, stud; 502, second worm wheel; 503, second worm; 504, first sprocket; 505, second sprocket; 506, chain; 601, electric cylinder; 602, second telescopic rod; 603, second spring; 604, support block; 701, gear ring; 702, gear; 703, third motor; 801, third telescopic rod; 901, protective cover. DETAILED DESCRIPTION

[0031] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0032] Example 1

[0033] A composite material compression testing machine for preventing eccentricity of the present invention comprises a base 101 and a support platform 102, wherein the support platform 102 is mounted on the top of the base 101; further comprising a supporting device, a moving device, a hydraulic cylinder 103, a pressure plate 104, a plurality of side plates 105 and a plurality of pressure sensors 106, wherein the top of the hydraulic cylinder 103 is mounted on the base 101 through the supporting device, the supporting device is used to drive the hydraulic cylinder 103 to move and adjust, the pressure plate 104 is mounted on the moving end of the hydraulic cylinder 103, and the pressure plate 104 is arranged opposite to the support platform 102 up and down, the plurality of side plates 105 are circumferentially arranged on the side of the support platform 102, the plurality of pressure sensors 106 are respectively mounted on the outer side walls of the plurality of side plates 105, the plurality of pressure sensors 106 are mounted on the base 101 through the moving device, and the moving device is used to drive the plurality of pressure sensors 106 to move in opposite directions;

[0034] The supporting device includes a driving device, an adjusting device, a bracket 201, a guide column 202, a supporting plate 203, a guide groove 204, a slider 205, a first lead screw 206 and a first motor 207. The bracket 201 is mounted on the top of the base 101, the guide column 202 is mounted on the bracket 201 for sliding up and down, the top of the supporting plate 203 is connected to the bottom of the guide column 202, and the supporting plate 203 moves up and down through the driving device, the guide groove 204 is rotatably mounted on the bottom of the supporting plate 203, and a level adjustment device is provided on the supporting plate 203. The adjusting device is used to drive the guide groove 204 to rotate, the slider 205 is slidably mounted on the guide groove 204, the top of the hydraulic cylinder 103 is connected to the top of the slider 205, the first lead screw 206 is rotatably mounted on the inner side wall of the guide groove 204, the slider 205 is screwed on the first lead screw 206, the first motor 207 is mounted on the outer side wall of the guide groove 204, and the output end of the first motor 207 is connected to the first lead screw 206;

[0035] In this embodiment, the composite material that needs to be compressed is prepared into a cylindrical shape, and the diameter of the composite material is larger than the diameter of the support platform 102. The composite material is then placed in the middle of the top of the support platform 102, and the multiple groups of pressure sensors 106 are driven by a moving device to move and adjust in opposite directions, so that the multiple groups of pressure sensors 106 drive the multiple groups of side plates 105 to contact the outer wall of the composite material, and the pressure plate 104 is driven downward by the hydraulic cylinder 103 to make the bottom end of the pressure plate 104 contact the top of the composite material and the top of the multiple groups of side plates 105. Then, the hydraulic cylinder 103 is driven downward by the supporting device, so that the hydraulic cylinder 103 drives the pressure plate 104 to move downward to perform a compression test on the composite material. When the pressure plate 104 compresses the composite material downward, it pushes the multiple groups of side plates 105 to move downward, so that the multiple groups of side plates 105 always limit the surrounding areas of the composite material for protection, thereby reducing the eccentric bending of the composite material during compression and avoiding eccentric bending of the composite material. The composite material 105 is then ejected to one side by pressure, thereby improving the safety of the test. When the composite material is compressed and squeezed and expands laterally, the composite material applies a driving force for lateral expansion to the multiple sets of side plates 105. The driving force is sensed by the multiple sets of pressure sensors 106, thereby facilitating the control of the moving device to drive the multiple sets of side plates 105 to move away from each other in coordination with the expansion of the composite material. At the same time, by sensing the size of the driving force and controlling the moving speed of the multiple sets of side plates 105, the multiple sets of side plates 105 always maintain a certain contact state with the side surface of the composite material, effectively reducing the eccentric bending of the composite material when compressed. When the multiple sets of pressure sensors 106 sense that one set of side plates 105 is subjected to a larger driving force, it indicates that the composite material is eccentric toward its side plate 105 position. At this time, the hydraulic cylinder 103 is driven to move horizontally through the support device, so that the pressure plate 104 moves in the opposite direction of the eccentricity, thereby correcting the eccentricity and improving the accuracy of the compression test of the composite material.

[0036] Example 2

[0037] On the basis of Example 1, a composite material compression testing machine to prevent eccentricity of the present invention, the mobile device includes a power device, multiple groups of support arms 301, multiple groups of connecting members 302, multiple groups of first telescopic rods 303, multiple groups of first springs 304, multiple groups of connecting arms 305 and a base 306, the multiple groups of support arms 301 are all slidably installed on the base 101, the multiple groups of connecting members 302 are respectively slidably installed up and down at the front ends of the multiple groups of support arms 301, and the multiple groups of pressure sensors 106 are respectively installed on the outer walls of the multiple groups of connecting members 302. On the upper part, multiple groups of first telescopic rods 303 are respectively installed on the outer side walls of multiple groups of support arms 301, the top ends of multiple groups of first telescopic rods 303 are respectively connected to the outer side walls of multiple groups of connecting members 302, multiple groups of first springs 304 are respectively installed on the outer side walls of multiple groups of first telescopic rods 303, the top ends of multiple groups of connecting arms 305 are respectively rotatably connected to the bottom ends of multiple groups of support arms 301, and the bottom ends of multiple groups of connecting arms 305 are rotatably installed on the outer side walls of the base 306, and a power device is provided on the base 101, which is used to drive the base 306 to move up and down;

[0038] The power device includes a sliding device, a second lead screw 401, a first worm wheel 402, a first worm 403, a first friction plate 404, a second friction plate 405, a spline sleeve 406, a spline shaft 407 and a second motor 408. The upper and lower ends of the second lead screw 401 are rotatably mounted on the outer wall of the base 101, the first worm wheel 402 is mounted on the outer wall of the second lead screw 401, the base 306 is screwed on the outer wall of the second lead screw 401, the first worm 403 is rotatably mounted on the outer wall of the base 101, and the first worm 403 is meshed with the first worm gear 402, the first friction plate 404 is mounted on the end of the first worm 403, the second friction plate 405 is mounted on the end of the spline sleeve 406, the spline sleeve 406 is mounted on the outer wall of the spline shaft 407, the spline shaft 407 is mounted on the moving end of the second motor 408, the second motor 408 is mounted on the outer wall of the base 101, and the output end of the second motor 408 is connected to the driving device, and a sliding device is provided on the base 101, and the sliding device is used to drive the spline sleeve 406 to move and adjust;

[0039] The driving device includes a stud 501, a second worm wheel 502, a second worm 503, a first sprocket 504, a second sprocket 505 and a chain 506. The bottom end of the stud 501 is fixedly connected to the top end of the support plate 203, the second worm wheel 502 is rotatably mounted on the top end of the bracket 201, and the second worm wheel 502 is screwed on the outer wall of the stud 501, the second worm 503 is rotatably mounted on the outer wall of the bracket 201, the second worm 503 is meshed with the second worm wheel 502, the first sprocket 504 is mounted on the end of the second worm 503, the second sprocket 505 is mounted on the other output end of the second motor 408, and the chain 506 is sleeved on the outer walls of the first sprocket 504 and the second sprocket 505;

[0040] The sliding device includes an electric cylinder 601, a second telescopic rod 602, a second spring 603 and a support block 604. The electric cylinder 601 is installed on the outer wall of the base 101, the second telescopic rod 602 is installed on the moving end of the electric cylinder 601, the second spring 603 is cooperatively installed on the outer wall of the second telescopic rod 602, the support block 604 is slidably installed on the base 101, the support block 604 is connected to the end of the second telescopic rod 602, and the spline sleeve 406 is rotatably installed on the support block 604;

[0041] The adjusting device includes a gear ring 701, a gear 702 and a third motor 703, wherein the gear ring 701 is mounted on the outer wall of the guide groove 204, the gear 702 is meshed with the gear ring 701, the third motor 703 is mounted on the outer wall of the support plate 203, and the output end of the third motor 703 is connected to the gear 702;

[0042] It also includes a plurality of sets of third telescopic rods 801, which are all mounted on the top of the base 306, and the tops of the plurality of sets of third telescopic rods 801 are all connected to the outer side wall of the base 101;

[0043] It also includes a protective cover 901, which is installed on the outer side wall of the base 101, and the protective cover 901 is installed outside the first sprocket 504, the second sprocket 505 and the chain 506;

[0044] A sensor assembly is disposed at the bottom of the support platform 102;

[0045] In this embodiment, the support plate 203 is driven downward by the driving device, so that the support plate 203 drives the guide groove 204 to move downward, so that the guide groove 204 drives the hydraulic cylinder 103 to move downward through the slider 205, thereby improving the convenience of the pressure plate 104 for the composite material extrusion test. When the composite material is eccentric, the guide groove 204 is driven to rotate horizontally to adjust the direction through the adjustment device, and the first motor 207 drives the first screw 206 to rotate. After the first screw 206 rotates, it drives the slider 205 to move horizontally, so that the slider 205 drives the hydraulic cylinder 103 to move horizontally, thereby improving the convenience of the pressure plate 104 moving in the opposite direction of the eccentricity of the composite material, and improving the composite material. Convenience of correction in the same eccentricity direction. When the composite material is placed on the top of the support platform 102, the power device drives the base 306 to move downward, so that the base 306 drives the multiple groups of support arms 301 to move closer to each other through the multiple groups of connecting arms 305, so that the multiple groups of support arms 301 drive the multiple groups of side panels 105 to move closer to each other and contact the composite material. When the composite material is compressed and expanded laterally, the power device drives the base 306 to move upward. After the base 306 moves upward, the multiple groups of side panels 105 move away from each other, thereby improving the convenience of the multiple groups of side panels 105 to cooperate with the expansion and movement of the composite material, reducing the influence of the multiple groups of side panels 105 on the compression test of the composite material, and improving the accuracy of the test and the convenience of operation.

[0046] like Figures 1 to 13As shown, a composite material compression testing machine for preventing eccentricity of the present invention prepares the composite material to be compressed into a cylindrical shape during operation, and makes the diameter of the composite material larger than the diameter of the support platform 102, and then places the composite material in the middle of the top of the support platform 102, and drives multiple groups of pressure sensors 106 to move and adjust in opposite directions through a moving device, so that the multiple groups of pressure sensors 106 drive multiple groups of side plates 105 to contact the outer side wall of the composite material, and drives the pressure plate 104 to move downward through the hydraulic cylinder 103, so that the bottom end of the pressure plate 104 contacts the top of the composite material and the tops of the multiple groups of side plates 105, and then drives the hydraulic cylinder 103 to move downward through the supporting device, so that the hydraulic cylinder 103 drives the pressure plate 104 to move downward to perform a compression test on the composite material, and the pressure plate 104 compresses the composite material downward and pushes the multiple groups of side plates 105 to move downward, thereby The multiple groups of side plates 105 are always used to limit and protect the composite material on all sides. When the composite material is compressed and squeezed and expands laterally, the composite material applies a driving force for lateral expansion to the multiple groups of side plates 105. The driving force is sensed by the multiple groups of pressure sensors 106, so that it is convenient to control the moving device to drive the multiple groups of side plates 105 to move away from each other in coordination with the expansion of the composite material. At the same time, by sensing the size of the driving force and controlling the moving speed of the multiple groups of side plates 105, the multiple groups of side plates 105 always maintain a certain contact state with the side of the composite material. When the multiple groups of pressure sensors 106 sense that one group of side plates 105 is subjected to a larger driving force, it indicates that the composite material is eccentric toward its side plate 105 position. At this time, the hydraulic cylinder 103 is driven to move horizontally through the support device, so that the pressure plate 104 moves in the opposite direction of the eccentricity, thereby correcting the eccentricity.

[0047] The main functions achieved by the present invention are: facilitating the multiple sets of side panels 105 to always provide position limiting protection on all sides of the composite material, reducing the eccentric bending during the compression of the composite material, avoiding the composite material from being ejected to one side under pressure after eccentric bending, improving the safety of the test, and facilitating eccentric correction to improve the accuracy of the composite material compression test.

[0048] The hydraulic cylinder 103, pressure sensor 106, first motor 207, second motor 408, electric cylinder 601 and third motor 703 of the composite material compression testing machine for preventing eccentricity of the present invention are purchased on the market. Technical personnel in the industry only need to install and operate them according to the accompanying instruction manual, without the need for technical personnel in this field to make creative efforts.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A composite material compression testing machine for preventing eccentricity, comprising a base (101) and a support platform (102), wherein the support platform (102) is mounted on the top of the base (101); characterized in that: The invention also comprises a supporting device, a moving device, a hydraulic cylinder (103), a pressure plate (104), a plurality of side plates (105) and a plurality of pressure sensors (106). The top end of the hydraulic cylinder (103) is mounted on the base (101) via the supporting device. The supporting device is used to drive the hydraulic cylinder (103) to move and adjust. The pressure plate (104) is mounted on the moving end of the hydraulic cylinder (103). The pressure plate (104) and the supporting platform (102) are arranged opposite to each other up and down. The plurality of side plates (105) are arranged circumferentially on the side of the supporting platform (102). The plurality of pressure sensors (106) are respectively mounted on the outer side walls of the plurality of side plates (105). The plurality of pressure sensors (106) are mounted on the base (101) via the moving device. The moving device is used to drive the plurality of pressure sensors (106) to move in opposite directions.

2. A composite material compression testing machine for preventing eccentricity according to claim 1, characterized in that: The support device comprises a driving device, an adjusting device, a bracket (201), a guide column (202), a support plate (203), a guide groove (204), a slider (205), a first lead screw (206) and a first motor (207); the bracket (201) is mounted on the top of the base (101); the guide column (202) is mounted on the bracket (201) to slide up and down; the top of the support plate (203) is connected to the bottom of the guide column (202); the support plate (203) moves up and down through the driving device; the guide groove (204) is rotatably mounted on the support plate ( The support plate (203) is provided with a level adjustment device, the adjustment device is used to drive the guide groove (204) to rotate, the slider (205) is slidably installed on the guide groove (204), the top of the hydraulic cylinder (103) is connected to the top of the slider (205), the first lead screw (206) is rotatably installed on the inner wall of the guide groove (204), the slider (205) is screwed on the first lead screw (206), the first motor (207) is installed on the outer wall of the guide groove (204), and the output end of the first motor (207) is connected to the first lead screw (206).

3. A composite material compression testing machine for preventing eccentricity as claimed in claim 1, characterized in that: The mobile device comprises a power device, multiple groups of support arms (301), multiple groups of connecting members (302), multiple groups of first telescopic rods (303), multiple groups of first springs (304), multiple groups of connecting arms (305) and a base (306); the multiple groups of support arms (301) are all slidably mounted on the base (101); the multiple groups of connecting members (302) are respectively slidably mounted on the front ends of the multiple groups of support arms (301); the multiple groups of pressure sensors (106) are respectively mounted on the outer side walls of the multiple groups of connecting members (302); the multiple groups of first telescopic rods (303) are respectively mounted on the outer side walls of the multiple groups of connecting members (302); The plurality of first telescopic rods (303) are mounted on the outer walls of the plurality of support arms (301), the top ends of the plurality of first telescopic rods (303) are respectively connected to the outer walls of the plurality of connecting members (302), the plurality of first springs (304) are respectively mounted on the outer walls of the plurality of first telescopic rods (303), the top ends of the plurality of connecting arms (305) are respectively rotatably connected to the bottom ends of the plurality of support arms (301), the bottom ends of the plurality of connecting arms (305) are rotatably mounted on the outer walls of the base (306), and a power device is arranged on the base (101), and the power device is used to drive the base (306) to move up and down.

4. A composite material compression testing machine for preventing eccentricity as claimed in claim 3, characterized in that: The power device comprises a sliding device, a second lead screw (401), a first worm wheel (402), a first worm (403), a first friction plate (404), a second friction plate (405), a spline sleeve (406), a spline shaft (407) and a second motor (408); the second lead screw (401) is rotatably mounted at its upper and lower ends on the outer side wall of the base (101); the first worm wheel (402) is mounted on the outer side wall of the second lead screw (401); the base (306) is threadedly mounted on the outer side wall of the second lead screw (401); the first worm (403) is rotatably mounted on the outer side wall of the base (101); The rod (403) is meshed with the first worm gear (402), the first friction plate (404) is installed at the end of the first worm (403), the second friction plate (405) is installed at the end of the spline sleeve (406), the spline sleeve (406) is installed on the outer wall of the spline shaft (407), the spline shaft (407) is installed on the moving end of the second motor (408), the second motor (408) is installed on the outer wall of the base (101), and the output end of the second motor (408) is connected to the driving device, and a sliding device is provided on the base (101), and the sliding device is used to drive the spline sleeve (406) to move and adjust.

5. A composite material compression testing machine for preventing eccentricity as claimed in claim 2, characterized in that: The driving device comprises a stud (501), a second worm wheel (502), a second worm (503), a first sprocket (504), a second sprocket (505) and a chain (506); the bottom end of the stud (501) is fixedly connected to the top end of the support plate (203); the second worm wheel (502) is rotatably mounted on the top end of the bracket (201); the second worm wheel (502) is threadedly mounted on the outer wall of the stud (501); the second worm wheel (503) is rotatably mounted on the outer wall of the bracket (201); the second worm wheel (503) is meshed with the second worm wheel (502); the first sprocket (504) is mounted on the end of the second worm wheel (503); the second sprocket (505) is mounted on another set of output ends of the second motor (408); and the chain (506) is sleeved on the outer walls of the first sprocket (504) and the second sprocket (505).

6. A composite material compression testing machine for preventing eccentricity as claimed in claim 4, characterized in that: The sliding device comprises an electric cylinder (601), a second telescopic rod (602), a second spring (603) and a support block (604); the electric cylinder (601) is mounted on the outer wall of the base (101); the second telescopic rod (602) is mounted on the movable end of the electric cylinder (601); the second spring (603) is cooperatively mounted on the outer wall of the second telescopic rod (602); the support block (604) is slidably mounted on the base (101); the support block (604) is connected to the end of the second telescopic rod (602); and the spline sleeve (406) is rotatably mounted on the support block (604).

7. A composite material compression testing machine for preventing eccentricity as claimed in claim 2, characterized in that: The adjusting device comprises a gear ring (701), a gear (702) and a third motor (703); the gear ring (701) is mounted on the outer wall of the guide groove (204); the gear (702) is meshed with the gear ring (701); the third motor (703) is mounted on the outer wall of the support plate (203); and the output end of the third motor (703) is connected to the gear (702).

8. A composite material compression testing machine for preventing eccentricity according to claim 1 or 3, characterized in that: It also includes a plurality of sets of third telescopic rods (801), which are all installed on the top of the base (306), and the tops of the plurality of sets of third telescopic rods (801) are all connected to the outer side wall of the base (101).

9. The composite material compression testing machine for preventing eccentricity according to claim 5, characterized in that: The invention also comprises a protective cover (901), which is mounted on the outer side wall of the base (101), and the protective cover (901) is mounted outside the first sprocket (504), the second sprocket (505) and the chain (506).

10. The composite material compression testing machine for preventing eccentricity according to claim 1, characterized in that: A sensor component is arranged at the bottom of the support platform (102).

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