A clamping device for fatigue testing of ultra-wide plates

Abstract

The present application discloses a clamping device for fatigue testing of ultra-wide plates, which relates to the field of fatigue testing technology and includes a clamp for clamping both ends of a plate sample, the clamp including a driving base, a jaw assembly, and a chuck; the driving base is used to install the clamp on the test equipment; the jaw assembly includes two jaws, and the space between the two jaws is used to clamp the plate sample; the chuck is movably arranged on the driving base, and the chuck has a clamping groove adapted to the jaw assembly, and both jaws are located in the clamping groove. There are multiple chucks, and 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 toward the plate sample. The clamping device for fatigue testing of ultra-wide plates provided in the present application can achieve clamping of ultra-wide plate samples by setting multiple 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 testing of materials has become quite popular, playing a particularly important role in material research and development and testing in fields such as aerospace, new material development, and nuclear energy. During fatigue testing of sheet metal, fatigue test fixtures are often hydraulic. However, due to the limitations of the fixture's piston diameter, the clamping width of the sheet metal is limited. Plates wider than 100 mm cannot be clamped, making fatigue testing of ultra-wide plates challenging.

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

[0004] In view of this, the purpose of this application is to provide a clamping device for fatigue testing of ultra-wide plates 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 testing includes a clamp for clamping both ends of a plate specimen, 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 jaws 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 jaws to clamp toward the plate sample.

[0010] Optionally, in the above-mentioned clamping device, the driving base includes:

[0011] Install the base;

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

[0013] A valve plate is provided on the mounting base, and the valve plate is used for delivering hydraulic oil to each of the chucks so as to move each of the chucks 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, and the jaw member has a first side surface and a second side surface that are relatively 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 member, so that the step recesses of the two jaw members are arranged to form a T-shaped slot for accommodating the push-pull block, and the push-pull block is adapted to the T-shaped slot to limit the movement of the jaw member 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, and 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 clamp 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 groove of each chuck, so that the driving base drives each chuck to move toward the driving base through hydraulic pressure, thereby enabling each chuck to drive 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 a hydraulic drive method 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 described below, and the technical features shown individually in the accompanying drawings may be combined arbitrarily, as long as the combined technical features do not conflict with each other. All possible feature combinations are technical contents explicitly described in this document. Any of the multiple sub-features included in the same statement can be applied independently and does not necessarily have to be applied in conjunction with the 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 following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0025] Figure 1 An exploded view of the 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 perspective;

[0028] Figure 4 Schematic diagram of the structure of the plate sample provided in the embodiment of this application.

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

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

[0031] 300 is the chuck, 301 is the chuck slot, 302 is the first chuck, 303 is the second chuck, 304 is the mounting slot, 305 is the baffle, and 306 is the 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 this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] Fatigue performance testing of materials has become quite popular, especially in the fields of aerospace, new material development, nuclear energy and atomic energy. During the fatigue performance test of plates, fatigue test fixtures are mostly hydraulic fixtures. However, due to the limitation of the diameter of the fixture piston, the width of the clamped plate is small. Plates with a width of more than 100mm cannot be clamped, 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 specimen 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 plate materials (hereinafter referred to as the clamping device), including a clamp for clamping both ends of a plate specimen 400, the clamp including a drive base 100, a jaw assembly 200, and a chuck 300. By providing multiple chucks 300, the problem of limited clamp piston diameter 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 specimen 400. In addition, the use of a hydraulic drive method can solve the problem of inexperienced operators being unable to clamp the plate specimen 400 and needing to adjust the coaxiality of the plate specimen 400.

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

[0038] Among them, such as Figures 1 to 4As shown, the driving base 100 can be used to install the fixture on the test equipment. The jaw assembly 200 includes two jaws 201, which can clamp the plate specimen 400 between them. A chuck 300 is movably mounted on the driving base 100 and has a clamping groove 301 that mates with the jaw assembly 200. Both jaws 201 are located within the clamping groove 301. Furthermore, multiple chucks 300 can be provided, allowing the driving base 100 to hydraulically drive each chuck 300 toward the driving base 100, thereby driving the two jaws 201 toward the plate specimen 400 for clamping. By providing multiple chucks 300, the limited diameter of the fixture piston can be resolved and the hydraulic cylinder area can be dispersed, enabling the clamping device to provide a high-tonnage clamping force while also being able to clamp even ultra-wide plate specimens 400. In addition, the 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, as 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, each connected to the mounting base 101. Each piston rod 102 is associated with a chuck 300, allowing the chuck 300 to move along the piston rod 102. The valve plate 103 is mounted on the mounting base 101 and is connected to the oil pipe of the testing equipment. This allows the valve plate 103 to deliver hydraulic oil to each chuck 300, thereby enabling each chuck 300 to move along the piston rod 102 toward the mounting base 101. When oil is flowing through the valve plate 103, the solenoid valve is switched, allowing each chuck 300 to move along the piston rod 102 toward the mounting base 101. This allows each chuck 300 to drive the two jaws 201 toward the plate specimen 400 and clamp them together.

[0040] In some embodiments, as 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 to the mounting base 101. At the same time, the other end of the piston rod 102 is provided with a push-pull block 104, which 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, as 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 arranged opposite to each other, wherein the first side surface is an inclined surface adapted to the side wall of the clamping groove 301, and the second side surface abuts against the plate sample 400. When oil is passed through the valve plate 103, the solenoid valve is switched, and each clamp head 300 can move along the piston rod 102 toward the mounting base 101. 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 toward the center to clamp the plate sample 400. Figure 2 and Figure 3 shown.

[0042] In some embodiments, as 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 member 201 can be restricted from moving along the axial direction of the piston rod 102.

[0043] In some embodiments, as 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, respectively. There are two second chucks 303, and the two second chucks 303 are located on either side of the first chuck 302 and are coaxially arranged with the first chuck 302. Furthermore, the piston rod 102 may include a first piston rod 1021 adapted to fit the first chuck 302 and a second piston rod 1022 adapted to fit the second chuck 303. The first piston rod 1021 is longer than the second piston rod 1022, so that the fixture can be mounted on the test equipment via the first piston rod 1021.

[0044] In some embodiments, as 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. One end of the first piston rod 1021 and the second piston rod 1022 can be respectively inserted through the mounting holes 1011 and locked by the lock nut 105. A gasket 107 can be disposed between the lock nut 105 and the mounting base 101 to enhance the locking effect of the lock nut 105. In addition, the bottoms of the first and second chucks 302 and 303 can be provided with perforations to allow the other ends of the first and second piston rods 1021 and 1022 to pass through the perforations of the first and second chucks 302 and 303, respectively, thereby mounting the push-pull block 104 within the T-slot 2012 formed by the two jaws 201. Furthermore, chuck covers 306 can be disposed at the perforations of the first and second chucks 302 and 303 to prevent dust and impurities from entering the chucks 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 be 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 mounted on the first piston rod 1021. The locking ring 106 has a first side and a second side disposed opposite each other. The first side of the locking ring 106 can abut against the locking nut 105, while the second side of the locking ring 106 is in contact with the sensor of the test equipment. After the clamping device and the test equipment are installed, the plate specimen 400 can be clamped with the fixture. A tensile force is then applied through the test equipment, causing the piston rod 102 to slightly deform. The locking ring 106 is then rotated, causing the first side of the locking ring 106 to abut against the locking nut 105, while the second side of the locking ring 106 is in contact with the sensor of the test equipment. The tensile force is then released, and the piston rod 102 recovers its slight deformation, thereby eliminating the gap between the clamping device and the test equipment.

[0047] In some embodiments, as Figure 1As shown, the clamping groove 301 is set from one end of the clamping head 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 falling out of the end of the clamping groove 301, the end of the clamping head 300 is provided with a mounting groove 304 for mounting a baffle 305. The baffle 305 can be installed on the clamping head 300 at the end, that is, the baffle 305 is installed at the end position of the second clamping head 303, thereby preventing the jaw assembly 200 from falling out of the end of the clamping groove 301. There can be two baffles 305 at either end, and they can be fixed to both sides of the clamping groove 301 by fasteners such as bolts to respectively restrict the two jaw members 201 from falling out.

[0048] In the above embodiment, the number of chucks 300 may be, but is not limited to, three; two, four, five, or more chucks may also be used to accommodate the clamping of plate specimens 400 of varying widths. Furthermore, the chuck 300 and jaw assembly 200 may be made of a high-strength alloy material, resulting in the chuck 300 and jaw assembly 200 having high strength and toughness, as well as high fatigue limit, resistance to multiple impacts, and good low-temperature impact toughness. This reduces the risk of wear and breakage of the chuck 300 and jaw assembly 200, while also increasing the service life of the clamping device.

[0049] The terms "first," "second," and so on in the specification, claims, and drawings of this application are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements and may include steps or elements that are not listed.

[0050] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one 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 is not limited to the embodiments shown herein, but is intended to 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 for clamping both ends of a plate sample (400) is provided, wherein the clamp comprises: A driving base (100) for mounting the fixture on a test device; A jaw assembly (200), the jaw assembly (200) comprising two jaw members (201), and the two jaw members (201) are used to clamp the plate sample (400); A chuck (300) is movably arranged on the driving base (100), the chuck (300) has a clamping groove (301) adapted to the jaw assembly (200), the two jaw members (201) are both located in the clamping groove (301), there are multiple chucks (300), and the driving base (100) drives each chuck (300) to move toward the driving base (100) through hydraulic pressure, so that each chuck (300) drives the two jaw members (201) to clamp toward the plate sample (400); The driving base (100) includes a mounting base (101), a piston rod (102) and a valve plate (103), wherein the piston rod (102) is multiple, 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), and the valve plate (103) is arranged on the mounting base (101), and the valve plate (103) is used to transport hydraulic oil to each of the chucks (300), so that each of the chucks (300) can move along the piston rod (102) toward the mounting base (101); 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); 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); 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) 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) to limit the movement of the jaw member (201) along the axial direction of the piston rod (102).

2. The clamping device according to claim 1, characterized in that There are three chucks (300), and the chucks (300) include a first chuck (302) and a second chuck (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.

3. The clamping device according to claim 2, 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).

4. The clamping device according to claim 3, 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.

5. The clamping device according to claim 3, 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).

6. The clamping device according to any one of claims 1 to 5, characterized in that: The clamping groove (301) is provided from one end of the clamping head (300) to the other end, and an installation groove (304) for installing a baffle (305) is provided at the end of the clamping head (300).

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