Electro-hydraulic servo horizontal tension tester

Abstract

The utility model relates to the technical field of tension testing machines, in particular to an electro-hydraulic servo horizontal tension testing machine which comprises a base arranged on the ground, four cross beams are arranged on one side of the base, one end of each cross beam is fixedly assembled with the surface of the base through a screw, and the four cross beams are respectively arranged at four vertex angle positions of one side of the base. The surfaces of the four cross beams are all provided with the same moving table, the surfaces of the cross beams penetrate through the interior of the moving table, a built-in sleeve is arranged in the moving table in a penetrating mode, the joint position of the built-in sleeve and the moving table is fixedly assembled through screws, and the surfaces of the cross beams and the inner wall face of the built-in sleeve are arranged in a sliding and sleeving mode. Through the cooperation of the moving table and the positioning table, the moving table and the positioning table can move relatively, so that the stability of the stretching process can be ensured during the tension test, the moving table slides on the corresponding cross beam through the built-in sleeve, and enough balance can be ensured when an object is pulled through the four groups of cross beams. And finally, a first piston rod of the first hydraulic cylinder can ensure stable telescopic displacement of movement.

Description

Technical Field

[0001] The utility model relates to the technical field of tension testing machines, in particular to an electro-hydraulic servo horizontal tension testing machine. Background Art

[0002] Electro-hydraulic servo is a servo control system that uses electrical signals to control the hydraulic system. It controls the flow, pressure and direction of the hydraulic system by converting electrical signals into hydraulic signals, thereby achieving precise control and regulation of mechanical equipment.

[0003] Electro-hydraulic servo systems have the advantages of fast response, high precision and good stability, and are widely used in various industrial equipment and engineering fields.

[0004] The electro-hydraulic servo system has the following advantages:

[0005] High precision: The electro-hydraulic servo system adopts closed-loop control, which can realize precise control and adjustment of the hydraulic system and has high control accuracy;

[0006] High response speed: The electro-hydraulic servo system adopts electrical signal transmission and hydraulic execution, has a fast response speed, and can achieve fast dynamic response;

[0007] Good stability: The electro-hydraulic servo system adopts negative feedback control, which can effectively suppress system interference and improve system stability.

[0008] A tensile testing machine is an instrument used to test the performance of materials or products under tension. It can perform mechanical property tests such as stretching, compression, bending, and shearing on various materials, components, and finished products by applying a certain tensile force.

[0009] The tensile testing machine has the characteristics of large load capacity, high measurement accuracy and easy operation. It is widely used in the fields of metal, non-metal, composite materials, biomaterials, as well as detection and testing in quality supervision, scientific research institutions, colleges and universities.

[0010] At present, when conventional tensile testing machines are used to stretch materials, the clamping structures at the ends are all transversely pushed mechanisms for horizontal clamping. However, during tensile testing, since there is no fulcrum on the outward side of the clamping structure, it is easy for the clamping points to become detached or broken when the tensile effect is too large during the test. The clamping part needs to be further improved to improve the stability of the clamping. Utility Model Content

[0011] The utility model aims to solve the above-mentioned shortcomings in the prior art and proposes an electro-hydraulic servo horizontal tensile testing machine.

[0012] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0013] An electro-hydraulic servo horizontal tensile testing machine is designed, comprising a base arranged on the ground, four beams being arranged on one side of the base, and one end of the beams being fixedly assembled with the surface of the base by screws, the four beams being arranged at four vertex positions on one side of the base respectively, the surfaces of the four beams being provided with the same moving platform, and the surfaces of the beams passing through the interior of the moving platform, the interior of the moving platform being provided with built-in sleeves, and the connecting position between the built-in sleeve and the moving platform being fixedly assembled by screws, the surfaces of the beams being slidably sleeved with the inner wall surface of the built-in sleeve, a positioning platform being arranged at the other end of the four beams, and the surface of the positioning platform being fixedly assembled with the end of the beam by screws, the lower end surface of the positioning platform being in contact with the ground like the base, the lower end surface of the moving platform being at least five centimeters above the ground, and the interior of the base being provided with a first hydraulic Cylinder, and the surface of the first hydraulic cylinder passes through the interior of the base, and the connecting position of the first hydraulic cylinder and the base is fixed by screws, a first piston rod is arranged inside the first hydraulic cylinder, and the end of the first piston rod passes through the first hydraulic cylinder to extend outward, and the other end of the first piston rod is fixed to the surface of the moving platform by screws, a second hydraulic cylinder is arranged on one side of the moving platform and one side of the positioning platform, and the moving platform and the positioning platform are respectively penetrated by the corresponding outer wall surface of the second hydraulic cylinder, and the moving platform and the positioning platform are respectively fixed and assembled with the corresponding connecting position of the second hydraulic cylinder by screws, a second piston rod is arranged inside the second hydraulic cylinder, and the end of the second piston rod passes through the interior of the second hydraulic cylinder to extend outward, a support rod is arranged at the end of the second piston rod, and the surface of the support rod and the end of the second piston rod are fixed by screws.

[0014] In detail, both ends of the support rod are provided with anti-slip discs, and the surface of the anti-slip discs and the end of the support rod are fixedly assembled by screws.

[0015] In detail, a sleeve is provided on the surface of the support rod, and the inner wall surface of the sleeve slides tightly against the surface of the support rod. There are two sleeves and they are symmetrically distributed along the second hydraulic cylinder. A chuck is provided on the outer ring wall of the sleeve, and the end of the chuck is fixedly assembled with the surface of the sleeve through a bracket.

[0016] In detail, the surfaces of the movable platform and the positioning platform are both provided with limit seats, and the ends of the limit seats on the surfaces of the movable platform and the positioning platform are fixed and assembled by screws, and the inclined surface of the other end of the limit seat fits with the outward side of the chuck and slides tightly against each other.

[0017] In detail, a spring is wound around the surface of the support rod, and two ends of the spring are respectively fixedly assembled with the end surface of the sliding sleeve and the end surface of the anti-slip disc.

[0018] In detail, an extension block is also provided on the outer ring wall of the sleeve, one end of the extension block is fixedly assembled with the outer wall surface of the sleeve by screws, and a limiting rod is provided on the surface of the extension block, one end of the limiting rod is welded and fixed to the surface of the extension block.

[0019] In detail, a limiting sleeve is arranged inside the limiting seat, the outer wall of the limiting sleeve is fixed to the internal connection position of the limiting seat by screws, and the inner wall of the limiting sleeve is slidingly and tightly arranged to the surface of the limiting rod.

[0020] The design scheme proposed by the utility model has the following beneficial effects during application:

[0021] 1. The cooperation between the moving platform and the positioning platform enables the two to move relative to each other, so that the stability of the stretching process can be guaranteed during the tensile test. The moving platform slides on the corresponding beam through the built-in sleeve, and through the four sets of beams, it can ensure sufficient balance when pulling objects. Finally, the first piston rod of the first hydraulic cylinder can ensure the stability of the telescopic displacement of the movement.

[0022] 2. The second piston rod of the second hydraulic cylinder can drive the chuck part to telescope and move. The chuck and the limit seat are matched and contacted with each other. The two chucks will move inward and ensure the stability of the clamping of the object. At the same time, the end of the limit seat can stabilize the position of the chuck to avoid deformation and collapse of the chuck due to the lack of protection points during the tensile test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is an enlarged schematic diagram of point a of the utility model;

[0025] Figure 3 This is a schematic diagram of the oblique distribution of the utility model;

[0026] Figure 4 It is a top view schematic diagram of the utility model;

[0027] Figure 5 This is a schematic diagram of the distribution of the base, mobile platform and positioning platform of the utility model.

[0028] In the figure: 10, base; 11, moving platform; 12, built-in sleeve; 13, crossbeam; 14, positioning platform; 15, first hydraulic cylinder; 16, second hydraulic cylinder; 17, support rod; 20, anti-slip plate; 21, sliding sleeve; 22, chuck; 23, limit seat; 24, spring; 30, extension block; 31, limit rod; 32, limit sleeve. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Reference Figure 1-Figure 5 The electro-hydraulic servo horizontal tensile testing machine includes a base 10 arranged on the ground, four crossbeams 13 are arranged on one side of the base 10, and one end of the crossbeam 13 is fixedly assembled with the surface of the base 10 by screws, and the four crossbeams 13 are respectively arranged at four vertex positions on one side of the base 10, and the surfaces of the four crossbeams 13 are all provided with the same moving platform 11, and the surface of the crossbeam 13 passes through the interior of the moving platform 11, and the interior of the moving platform 11 passes through a built-in sleeve 12, and the connecting position of the built-in sleeve 12 and the moving platform 11 is fixedly assembled by screws, and the surface of the crossbeam 13 is slidably sleeved with the inner wall surface of the built-in sleeve 12, and a positioning platform 14 is arranged at the other end of the four crossbeams 13, and the surface of the positioning platform 14 is fixedly assembled with the end of the crossbeam 13 by screws, and the lower end surface of the positioning platform 14 is in contact with the ground like the base 10, and the lower end surface of the moving platform 11 is at least five centimeters above the ground, and the interior of the base 10 is provided with a first A hydraulic cylinder 15, and the surface of the first hydraulic cylinder 15 passes through the interior of the base 10, and the connection position between the first hydraulic cylinder 15 and the base 10 is fixed by screws, a first piston rod is arranged inside the first hydraulic cylinder 15, and the end of the first piston rod passes through the first hydraulic cylinder 15 to extend outward, and the other end of the first piston rod is fixed to the surface of the moving platform 11 by screws, a second hydraulic cylinder 16 is arranged on one side of the moving platform 11 and one side of the positioning platform 14, and the moving platform 11 and the positioning platform 14 are respectively penetrated with the corresponding outer wall surface of the second hydraulic cylinder 16, and the moving platform 11 and the positioning platform 14 are respectively fixed and assembled with the corresponding connection position of the second hydraulic cylinder 16 by screws, a second piston rod is arranged inside the second hydraulic cylinder 16, and the end of the second piston rod passes through the interior of the second hydraulic cylinder 16 to extend outward, a support rod 17 is arranged at the end of the second piston rod, and the surface of the support rod 17 is fixed to the end of the second piston rod by screws.

[0031] An electro-hydraulic servo system is arranged in the base 10, and the electro-hydraulic servo system mainly consists of the following parts: sensor: used to detect the state and parameters of the controlled object, convert it into an electrical signal and input it into the control system, controller: used to process the electrical signal input by the sensor, and compare it with the set value to generate an error signal, and then convert the error signal into a control signal output, electro-hydraulic servo valve: converts the control signal output by the controller into hydraulic power to control the movement of the hydraulic cylinder or hydraulic motor.

[0032] It should be further explained that both ends of the support rod 17 are provided with anti-slip discs 20, and the surface of the anti-slip discs 20 and the end of the support rod 17 are fixedly assembled by screws.

[0033] It should be further explained that a sleeve 21 is provided on the surface of the support rod 17, and the inner wall surface of the sleeve 21 slides tightly against the surface of the support rod 17. There are two sleeves 21 and they are symmetrically distributed along the second hydraulic cylinder 16. A chuck 22 is provided on the outer ring wall of the sleeve 21, and the end of the chuck 22 is fixedly assembled with the surface of the sleeve 21 through a bracket.

[0034] It should be further explained that a limit seat 23 is provided on the surface of the moving table 11 and the positioning table 14. The ends of the limit seat 23 are fixedly assembled on the surface of the moving table 11 and the surface of the positioning table 14 by screws. The inclined surface at the other end of the limit seat 23 fits in and slides closely with the outward side of the chuck 22. The limit seat 23 allows the two chucks 22 moving in opposite directions to clamp the object. At the same time, after clamping, the outward side of the chuck 22 can be supported and pressed.

[0035] It should be further explained that a spring 24 is wound around the surface of the support rod 17, and both ends of the spring 24 are fixedly assembled with the end surface of the sliding sleeve 21 and the end surface of the anti-slip disk 20 respectively, so that the chuck 22 can be reset by the spring 24 when it retracts.

[0036] It should be further explained that an extension block 30 is also provided on the outer ring wall of the sleeve 21, one end of the extension block 30 is fixedly assembled with the outer wall surface of the sleeve 21 by screws, and a limiting rod 31 is provided on the surface of the extension block 30, one end of the limiting rod 31 is welded and fixed to the surface of the extension block 30.

[0037] It should be further explained that a limiting sleeve 32 is set through the inside of the limiting seat 23, and the outer wall surface of the limiting sleeve 32 and the internal connection position of the limiting seat 23 are fixed by screws, and the inner wall surface of the limiting sleeve 32 and the surface of the limiting rod 31 are set to slide tightly, which can ensure the stable horizontal movement of the chuck 22.

[0038] Working method: When a tensile strength test of an object is required, the first piston rod of the first hydraulic cylinder 15 is extended and retracted so that the movable platform 11 can be moved horizontally, thereby adjusting the distance between the movable platform 11 and the positioning platform 14 according to the length of the object to ensure that the two ends of the object are respectively placed between the chuck 22 structures distributed on both sides.

[0039] The second piston rod of the second hydraulic cylinder 16 is extended so that the support rod 17 can be pushed forward, moving the two chucks 22 forward, and cooperating with the limit seat 23 to push, so that the two oppositely distributed chucks 22 on one side can clamp one end of the object. At this time, the spring 24 is stretched, and the limit rod 31 slides in the limit sleeve 32, which can ensure that the chuck 22 can move horizontally. When it needs to be released, the second piston rod retracts, and the two oppositely distributed chucks 22 are separated through the resetting effect of the spring 24.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electro-hydraulic servo horizontal tensile testing machine, comprising a base (10) arranged on the ground, characterized in that: Four cross beams (13) are arranged on one side of the base (10), and one end of the cross beam (13) is fixedly assembled with the surface of the base (10) by means of screws. The four cross beams (13) are respectively arranged at four vertex positions on one side of the base (10). The surfaces of the four cross beams (13) are all provided with a same moving platform (11), and the surface of the cross beam (13) passes through the interior of the moving platform (11). The interior of the moving platform (11) is provided with a built-in sleeve (12), and the connection between the built-in sleeve (12) and the moving platform (11) is The positions are fixed and assembled by screws, the surface of the cross beam (13) is slidably sleeved with the inner wall surface of the built-in sleeve (12), a positioning platform (14) is arranged at the other end of the four cross beams (13), and the surface of the positioning platform (14) is fixed and assembled with the end of the cross beam (13) by screws, the lower end surface of the positioning platform (14) is the same as the base (10) and is arranged in contact with the ground, the lower end surface of the moving platform (11) is at least five centimeters above the ground, and a first hydraulic cylinder (15) is arranged inside the base (10), The surface of the first hydraulic cylinder (15) passes through the interior of the base (10), and the connection position of the first hydraulic cylinder (15) and the base (10) is fixed by screws. A first piston rod is arranged inside the first hydraulic cylinder (15), and the end of the first piston rod passes through the first hydraulic cylinder (15) and extends outwards. The other end of the first piston rod is fixed to the surface of the moving platform (11) by screws. A second hydraulic cylinder (16) is arranged on one side of the moving platform (11) and one side of the positioning platform (14), and the moving platform (11) and the positioning platform (14) are respectively arranged to pass through the outer wall surface of the corresponding second hydraulic cylinder (16). The moving platform (11) and the positioning platform (14) are respectively fixed and assembled with screws at the connection position of the corresponding second hydraulic cylinder (16). A second piston rod is arranged inside the second hydraulic cylinder (16), and the end of the second piston rod passes through the interior of the second hydraulic cylinder (16) and extends outwards. A support rod (17) is arranged at the end of the second piston rod, and the surface of the support rod (17) and the end of the second piston rod are fixed by screws.

2. The electro-hydraulic servo horizontal tensile testing machine according to claim 1, characterized in that: Anti-slip discs (20) are provided at both ends of the support rod (17), and the surface of the anti-slip disc (20) and the end of the support rod (17) are fixedly assembled by screws.

3. The electro-hydraulic servo horizontal tensile testing machine according to claim 2, characterized in that: The surface of the support rod (17) is provided with a sliding sleeve (21), the inner wall surface of the sliding sleeve (21) is in sliding contact with the surface of the support rod (17), there are two sliding sleeves (21) and they are symmetrically distributed along the second hydraulic cylinder (16), a chuck (22) is provided on the outer ring wall of the sliding sleeve (21), and the end of the chuck (22) is fixedly assembled with the surface of the sliding sleeve (21) through a bracket.

4. The electro-hydraulic servo horizontal tensile testing machine according to claim 3, characterized in that: The surfaces of the movable platform (11) and the positioning platform (14) are both provided with a limiting seat (23), and the ends of the limiting seat (23) on the surfaces of the movable platform (11) and the positioning platform (14) are fixedly assembled by screws, and the inclined surface at the other end of the limiting seat (23) and the outward side of the clamp (22) are mutually fitted and slidably and tightly arranged.

5. The electro-hydraulic servo horizontal tensile testing machine according to claim 4, characterized in that: A spring (24) is wound around the surface of the support rod (17), and two ends of the spring (24) are respectively fixedly assembled with the end surface of the sliding sleeve (21) and the end surface of the anti-slip disc (20).

6. The electro-hydraulic servo horizontal tensile testing machine according to claim 5, characterized in that: An extension block (30) is also provided on the outer ring wall of the sliding sleeve (21), one end of the extension block (30) is fixedly assembled with the outer wall surface of the sliding sleeve (21) by means of screws, a limiting rod (31) is provided on the surface of the extension block (30), one end of the limiting rod (31) is fixedly welded to the surface of the extension block (30).

7. The electro-hydraulic servo horizontal tensile testing machine according to claim 6, characterized in that: A limiting sleeve (32) is provided inside the limiting seat (23), the outer wall surface of the limiting sleeve (32) and the internal connection position of the limiting seat (23) are fixed by screws, and the inner wall surface of the limiting sleeve (32) and the surface of the limiting rod (31) are slidably and tightly arranged.

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