Clamping device for fatigue test of ultra-wide plate

Abstract

The invention discloses a clamping device for an ultra-wide plate fatigue test, and relates to the technical field of fatigue tests.The clamping device comprises a clamp used for clamping the two ends of a plate sample, and the clamp comprises a driving base, a jaw assembly and a chuck; the driving base is used for mounting the clamp on test equipment; the jaw assembly comprises two jaw pieces, and a plate sample is clamped between the two jaw pieces; the clamping heads are movably arranged on the driving base, the clamping heads are provided with clamping opening grooves matched with the jaw assemblies, the two jaw pieces are located in the clamping opening grooves, the driving base drives the clamping heads to move in the direction close to the driving base through hydraulic pressure, and therefore the clamping heads drive the two jaw pieces to clamp the plate sample in the direction. According to the clamping device for the fatigue test of the ultra-wide plate, provided by the invention, the clamping of the ultra-wide plate sample can be realized by arranging a plurality of chucks.

Description

Technical Field

[0001] The present application relates to the technical field of fatigue testing, and more specifically, to a clamping device for fatigue testing of ultra-wide plates. Background Art

[0002] Fatigue performance testing of materials has become popular, especially in the fields of aerospace, new material development, nuclear energy and atomic energy. In the fatigue performance test of plates, fatigue test fixtures are mostly hydraulic fixtures, but due to the limitation of the diameter of the fixture piston, the width of the clamped plate is small, and it is impossible to clamp plates with a width of more than 100mm, making fatigue testing of ultra-wide plates difficult.

[0003] Therefore, how to clamp the ultra-wide plate has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a clamping device for fatigue testing of ultra-wide plates, so as to achieve clamping of ultra-wide plates.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] A clamping device for ultra-wide plate fatigue test, comprising a clamp for clamping two ends of a plate sample, the clamp comprising:

[0007] A driving base, used for mounting the fixture on the test equipment;

[0008] A jaw assembly, the jaw assembly comprising two jaw members, and the two jaw members are used to clamp the plate sample;

[0009] A chuck is movably arranged on the driving base, and the chuck has a clamping groove adapted to the jaw assembly. Both of the two jaw members are located in the clamping groove. There are multiple chucks, and the driving base drives each of the chucks to move toward the driving base through hydraulic pressure, so that each of the chucks drives the two jaw members to clamp in the direction of the plate sample.

[0010] Optionally, in the above clamping device, the driving base comprises:

[0011] Install the base;

[0012] A piston rod, wherein there are multiple piston rods, each of which is connected to the mounting base, and each of which is arranged in a one-to-one correspondence with the chuck, so that the chuck can move along the piston rod;

[0013] A valve plate is arranged on the mounting base, and the valve plate is used to deliver hydraulic oil to each of the chucks so that each of the chucks moves along the piston rod toward the mounting base.

[0014] Optionally, in the above-mentioned clamping device, one end of the piston rod is provided with a threaded portion for fixing to the mounting base, and the other end of the piston rod is provided with a push-pull block, which is adapted to the jaw member to limit the movement of the jaw member along the axial direction of the piston rod.

[0015] Optionally, in the above-mentioned clamping device, the clamping groove is a dovetail groove structure, the jaw member has a first side surface and a second side surface that are oppositely arranged, the first side surface is an inclined surface adapted to the side wall of the clamping groove, and the second side surface is used to abut against the plate sample.

[0016] Optionally, in the above-mentioned clamping device, a step recess is provided on the second side of the jaw piece, so that the step recesses of the two jaw pieces are arranged to form a T-slot for accommodating the push-pull block, and the push-pull block is adapted to the T-slot to limit the movement of the jaw piece along the axial direction of the piston rod.

[0017] Optionally, in the above-mentioned clamping device, there are three chucks, and the chucks include a first chuck and a second chuck located on both sides of the first chuck, the piston rod includes a first piston rod adapted to the first chuck and a second piston rod adapted to the second chuck, the length of the first piston rod is greater than that of the second piston rod, and the first piston rod is used to install the fixture on the test equipment.

[0018] Optionally, in the above-mentioned clamping device, mounting holes for mounting the first piston rod and the second piston rod are respectively provided on the mounting base, and the first piston rod and the second piston rod respectively pass through the mounting holes and are locked by locking nuts.

[0019] Optionally, in the above-mentioned clamping device, a locking ring is movably provided on the first piston rod, and the locking ring has a first side and a second side arranged opposite to each other, the first side of the locking ring is used to abut against the locking nut, and the second side of the locking ring is used to fit with the sensor of the test equipment.

[0020] Optionally, in the above-mentioned clamping device, the mounting base is a T-shaped structure, and the mounting base has a locking space for facilitating locking of the second piston rod.

[0021] Optionally, in the above-mentioned clamping device, the clamping groove is set to pass through from one end of the clamp to the other end, and the end of the clamp is provided with a mounting groove for mounting a baffle.

[0022] The clamping device for fatigue testing of ultra-wide plates provided in the present application is provided with a plurality of chucks, and the two jaws of the jaw assembly are installed in the clamping grooves of each chuck, so that the driving base drives each chuck to move toward the driving base through hydraulic pressure, so that each chuck drives the two jaws to clamp in the direction of the plate sample. As can be seen from the above examples, the clamping device for fatigue testing of ultra-wide plates provided in the present application can solve the problem of limited diameter of the clamp piston by providing a plurality of chucks, and can disperse the area of ​​the oil cylinder, so that the clamping device can provide a large tonnage holding force while being able to clamp the ultra-wide plate sample. In addition, the use of hydraulic drive can solve the problem that inexperienced operators cannot clamp the plate sample and need to adjust the coaxiality of the plate sample.

[0023] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 An exploded view of a clamping device provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of a clamping device provided in an embodiment of the present application from a first perspective;

[0027] Figure 3 A schematic diagram of a clamping device provided in an embodiment of the present application from a second viewing angle;

[0028] Figure 4 A schematic diagram of the structure of a plate sample provided in an embodiment of the present application.

[0029] Among them, 100 is a driving base, 101 is a mounting base, 1011 is a mounting hole, 1012 is a locking space, 102 is a piston rod, 1021 is a first piston rod, 1022 is a second piston rod, 103 is a valve plate, 104 is a push-pull block, 105 is a locking nut, 106 is a locking ring, and 107 is a gasket;

[0030] 200 is a jaw assembly, 201 is a jaw member, 2011 is a step notch, and 2012 is a T-slot;

[0031] 300 is a chuck, 301 is a chuck slot, 302 is a first chuck, 303 is a second chuck, 304 is a mounting slot, 305 is a baffle, and 306 is a chuck cover plate;

[0032] 400 is the plate sample. DETAILED DESCRIPTION

[0033] The core of this application is to provide a clamping device for fatigue testing of ultra-wide plates to achieve clamping of ultra-wide plates.

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] Fatigue performance testing of materials has become popular, especially in the fields of aerospace, new material development, nuclear energy and atomic energy. In the fatigue performance test of plates, fatigue test fixtures are mostly hydraulic fixtures, but due to the limitation of the diameter of the fixture piston, the width of the clamped plate is small, and it is impossible to clamp plates with a width of more than 100 mm, making fatigue testing of ultra-wide plates difficult. It should be noted that in this embodiment, if Figure 4 As shown, the width a of the ultra-wide plate sample ranges from 0 to 510 mm.

[0036] For this reason, Figure 1 As shown, the embodiment of the present application discloses a clamping device for fatigue testing of ultra-wide plates (hereinafter referred to as the clamping device), including a clamp for clamping both ends of a plate sample 400, and the clamp includes a driving base 100, a jaw assembly 200 and a chuck 300. By providing a plurality of chucks 300, the problem of limited diameter of the clamp piston is solved, and the area of ​​the oil cylinder can be dispersed, so that the clamping device can provide a large tonnage holding force while being able to clamp the ultra-wide plate sample 400. In addition, the use of a hydraulic drive method can solve the problem that inexperienced operators cannot clamp the plate sample 400 and need to adjust the coaxiality of the plate sample 400.

[0037] The following will be combined Figures 1 to 4 The clamping device for fatigue testing of ultra-wide plates disclosed in the embodiment of the present application is specifically explained and illustrated.

[0038] Among them, Figures 1 to 4As shown, the driving base 100 can be used to install the clamp on the test equipment. At the same time, the jaw assembly 200 includes two jaws 201, and the two jaws 201 can clamp the plate sample 400. The chuck 300 can be movably arranged on the driving base 100, and the chuck 300 has a clamping groove 301 adapted to the jaw assembly 200, and the two jaws 201 are both located in the clamping groove 301. In addition, the chuck 300 can be multiple, so that the driving base 100 can drive each chuck 300 to move toward the driving base 100 through hydraulic pressure, so that each chuck 300 drives the two jaws 201 to clamp in the direction of the plate sample 400. By providing multiple chucks 300, the problem of limited diameter of the clamp piston can be solved, and the area of ​​the oil cylinder can be dispersed, so that the clamping device can provide a large tonnage holding force while being able to clamp the ultra-wide plate sample 400. In addition, the use of a hydraulic drive method can solve the problem that an inexperienced operator cannot clamp the plate sample 400 and needs to adjust the coaxiality of the plate sample 400.

[0039] In some embodiments, Figures 1 to 3 As shown, the driving base 100 includes a mounting base 101, a piston rod 102 and a valve plate 103. There are multiple piston rods 102, and each piston rod 102 is connected to the mounting base 101. At the same time, each piston rod 102 is arranged in a one-to-one correspondence with the chuck 300, so that the chuck 300 can move along the piston rod 102. The valve plate 103 is arranged on the mounting base 101, and can be connected with the oil pipe of the test equipment through the valve plate 103, so that the valve plate 103 can transport hydraulic oil to each chuck 300, so that each chuck 300 can move along the piston rod 102 toward the mounting base 101. When the valve plate 103 is oiled, each chuck 300 can move along the piston rod 102 toward the mounting base 101 through the switching of the solenoid valve, so that each chuck 300 drives the two jaws 201 to clamp toward the plate sample 400.

[0040] In some embodiments, Figure 1 and Figure 3 As shown, one end of the piston rod 102 is provided with a threaded portion fixed to the mounting base 101, so that the piston rod 102 can be threadedly connected with the mounting base 101. At the same time, the other end of the piston rod 102 is provided with a push-pull block 104, and the push-pull block 104 is adapted to the jaw member 201 to limit the movement of the jaw member 201 along the axial direction of the piston rod 102.

[0041] In some embodiments, Figure 1As shown, the clamping groove 301 can adopt a dovetail groove structure, and the jaw member 201 has a first side surface and a second side surface that are arranged opposite to each other, wherein the first side surface is an inclined surface that matches the side wall of the clamping groove 301, and the second side surface abuts against the plate sample 400. When the valve plate 103 is oiled, each clamp head 300 can move along the piston rod 102 toward the mounting base 101 through the switching of the solenoid valve, and at the same time, the push-pull block 104 can limit the movement of the jaw member 201 along the axial direction of the piston rod 102. At this time, the first side surface of the jaw member 201 is squeezed downward by the inclined surface of the clamping groove 301, so that the two jaw members 201 move closer to the middle to clamp the plate sample 400, as shown in FIG. Figure 2 and Figure 3 shown.

[0042] In some embodiments, Figure 1 As shown, the second side surface of the jaw member 201 is provided with a step recess 2011, and the step recess 2011 is provided from one end of the jaw member 201 to the other end, so that the step recesses 2011 of the two jaw members 201 are arranged to form a T-shaped slot 2012 for accommodating the push-pull block 104, and the push-pull block 104 is adapted to the T-shaped slot 2012, that is, the cross-sectional shape of the push-pull block 104 is T-shaped, and the width of the push-pull block 104 should be slightly smaller than the width of the T-shaped slot 2012, so that the two jaw members 201 can move toward the middle under the action of the downward extrusion force of the inclined surface of the clamping groove 301, thereby clamping the plate sample 400, and at the same time, the jaw members 201 can be limited to move along the axial direction of the piston rod 102.

[0043] In some embodiments, Figures 1 to 3 As shown, three chucks 300 may be used. For ease of understanding, the three chucks 300 are defined as a first chuck 302 and a second chuck 303, wherein there are two second chucks 303, and the two second chucks 303 are respectively located on both sides of the first chuck 302 and are coaxially arranged with the first chuck 302. At the same time, the piston rod 102 may include a first piston rod 1021 adapted to the first chuck 302 and a second piston rod 1022 adapted to the second chuck 303, and the length of the first piston rod 1021 is greater than that of the second piston rod 1022, so that the fixture can be installed on the test equipment through the first piston rod 1021.

[0044] In some embodiments, Figures 1 to 3As shown, the mounting base 101 is provided with mounting holes 1011 for mounting the first piston rod 1021 and the second piston rod 1022, and one end of the first piston rod 1021 and the second piston rod 1022 can pass through the mounting holes 1011 and be locked by the locking nut 105, and a gasket 107 can be provided between the locking nut 105 and the mounting base 101 to improve the locking effect of the locking nut 105. In addition, a perforation can be provided at the bottom of the first chuck 302 and the second chuck 303, so that the other end of the first piston rod 1021 and the second piston rod 1022 can pass through the perforation of the first chuck 302 and the second chuck 303, respectively, so as to install the push-pull block 104 in the T-shaped slot 2012 formed by the two jaws 201. At the same time, a chuck cover plate 306 can be provided at the perforation position of the first chuck 302 and the second chuck 303 to prevent dust and impurities from entering the chuck 300 and affecting the normal operation of the clamping device.

[0045] In order to facilitate locking the second piston rod 1022 and the mounting base 101, in some embodiments, such as Figure 1 As shown, the mounting base 101 may adopt a T-shaped structure, and the mounting base 101 has a locking space 1012 for locking the second piston rod 1022 so that a locking tool can be inserted to lock the locking nut 105 of the second piston rod 1022 .

[0046] In order to eliminate the gap between the clamping device and the test equipment, in some embodiments, such as Figure 1 and Figure 3 As shown, a locking ring 106 is movably provided on the first piston rod 1021, and the locking ring 106 has a first side and a second side arranged opposite to each other, wherein the first side of the locking ring 106 can abut against the locking nut 105, and the second side of the locking ring 106 fits with the sensor of the test equipment. When the clamping device and the test equipment are installed, the plate sample 400 can be clamped by the clamp first, and a tensile force is applied by the test equipment. At this time, the piston rod 102 will produce a slight deformation, and the locking ring 106 is rotated so that the first side of the locking ring 106 fits with the locking nut 105, and the second side of the locking ring 106 fits with the sensor of the test equipment. Then the tensile force is removed, and the slight deformation of the piston rod 102 is restored, thereby achieving the purpose of eliminating the gap between the clamping device and the test equipment.

[0047] In some embodiments, Figure 1As shown, the clamping slot 301 is set from one end of the clamp 300 to the other end to facilitate the installation of the jaw assembly 200. At the same time, in order to prevent the jaw assembly 200 from slipping out of the end of the clamping slot 301, the end of the clamp 300 is provided with a mounting slot 304 for mounting a baffle 305, so that the baffle 305 can be installed on the clamp 300 located at the end, that is, the baffle 305 is installed at the end position of the second clamp 303, thereby preventing the jaw assembly 200 from slipping out of the end of the clamping slot 301. There can be two baffles 305 at either end, and they can be fixed to both sides of the clamping slot 301 by bolts or other fasteners, respectively, to limit the two jaws 201 from slipping out.

[0048] In the above embodiment, the number of the chucks 300 may be, but not limited to, three, and may also be two, four, five or more, to accommodate the clamping of plate specimens 400 of different widths. At the same time, the chuck 300 and the jaw assembly 200 may be made of high-strength alloy material, so that the chuck 300 and the jaw assembly 200 have high strength and toughness, high fatigue limit and multiple impact resistance, good low-temperature impact toughness, etc., reducing the risk of wear and breakage of the chuck 300 and the jaw assembly 200, while increasing the service life of the clamping device.

[0049] The terms "first" and "second" and the like in the specification and claims of this application and the above drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamping device for fatigue testing of ultra-wide plates, characterized in that: A clamp is provided for clamping two ends of a plate sample (400), the clamp comprising: A driving base (100) for mounting the fixture on a test device; A jaw assembly (200), the jaw assembly (200) comprising two jaw pieces (201), and the two jaw pieces (201) are used to clamp the plate sample (400); A chuck (300) is movably arranged on the driving base (100), the chuck (300) having a clamping groove (301) adapted to the jaw assembly (200), the two jaw members (201) being both located in the clamping groove (301), there being a plurality of chucks (300), and the driving base (100) drives each chuck (300) to move in a direction close to the driving base (100) by hydraulic pressure, so that each chuck (300) drives the two jaw members (201) to clamp in a direction toward the plate sample (400).

2. The clamping device according to claim 1, characterized in that: The driving base (100) comprises: Mounting base (101); A piston rod (102), wherein there are a plurality of piston rods (102), each of the piston rods (102) is connected to the mounting base (101), and each of the piston rods (102) is arranged in a one-to-one correspondence with the chuck (300), so that the chuck (300) can move along the piston rod (102); A valve plate (103) is arranged on the mounting base (101), and the valve plate (103) is used to deliver hydraulic oil to each of the chucks (300) so that each of the chucks (300) moves along the piston rod (102) in a direction toward the mounting base (101).

3. The clamping device according to claim 2, characterized in that: One end of the piston rod (102) is provided with a threaded portion for fixing to the mounting base (101), and the other end of the piston rod (102) is provided with a push-pull block (104), and the push-pull block (104) is adapted to the jaw member (201) to limit the movement of the jaw member (201) along the axial direction of the piston rod (102).

4. The clamping device according to claim 3, characterized in that: The clamping groove (301) is a dovetail groove structure, and the jaw member (201) has a first side surface and a second side surface that are arranged opposite to each other, the first side surface is an inclined surface adapted to the side wall of the clamping groove (301), and the second side surface is used to abut against the plate sample (400).

5. The clamping device according to claim 4, characterized in that: The second side surface of the jaw member (201) is provided with a step recess (2011), so that the step recesses (2011) of the two jaw members (201) surround and form a T-shaped slot (2012) for accommodating the push-pull block (104), and the push-pull block (104) is adapted to the T-shaped slot (2012) to limit the movement of the jaw member (201) along the axial direction of the piston rod (102).

6. The clamping device according to claim 2, characterized in that: There are three chucks (300), and the chucks (300) include a first chuck (302) and second chucks (303) located on both sides of the first chuck (302); the piston rod (102) includes a first piston rod (1021) adapted to the first chuck (302) and a second piston rod (1022) adapted to the second chuck (303); the length of the first piston rod (1021) is greater than that of the second piston rod (1022); the first piston rod (1021) is used to install the fixture on the test equipment.

7. The clamping device according to claim 6, characterized in that: The mounting base (101) is provided with mounting holes (1011) for mounting the first piston rod (1021) and the second piston rod (1022), respectively. The first piston rod (1021) and the second piston rod (1022) respectively pass through the mounting holes (1011) and are locked by locking nuts (105).

8. The clamping device according to claim 7, characterized in that: A locking ring (106) is movably provided on the first piston rod (1021), and the locking ring (106) has a first side and a second side that are arranged opposite to each other. The first side of the locking ring (106) is used to abut against the locking nut (105), and the second side of the locking ring (106) is used to fit with the sensor of the test equipment.

9. The clamping device according to claim 7, characterized in that: The mounting base (101) is a T-shaped structure, and the mounting base (101) has a locking space (1012) for facilitating locking of the second piston rod (1022).

10. The clamping device according to any one of claims 1 to 9, characterized in that: The clamping groove (301) is arranged to pass through from one end of the clamping head (300) to the other end, and a mounting groove (304) for mounting a baffle (305) is arranged at the end of the clamping head (300).

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