Positioning device and stress loading support

Abstract

The utility model relates to the field of material engineering experiments, and provides a positioning device, the positioning device is installed on a stress loading support, the stress loading support comprises a cross beam, a base and a stand column, a stress loading device is installed on the cross beam, the stress loading device is used for applying various force loads to a sample, and the stand column is installed on the base. The upper end of the sample is mounted on a testing machine loading head of the stress loading device, and the lower end of the sample is mounted on the base; a clamp assembly is installed below the sample, a clamping groove is formed in the base, the clamp assembly is installed in the clamping groove, a positioning device is installed in the clamping groove and comprises a positioning block, a V-shaped positioning groove is formed in the positioning block, a V-shaped positioning protrusion is arranged on the clamp assembly, and the V-shaped positioning protrusion is connected with the V-shaped positioning groove in a matched and clamped mode. According to the positioning device disclosed by the utility model, the mounting efficiency of a sample is improved; the central axis of the sample and the central axis of the loading head of the testing machine can be coaxially arranged, and the accuracy of a test result is relatively high.

Description

Technical Field

[0001] This utility model relates to the field of materials engineering experiments, and more specifically, to a positioning device and a stress loading bracket. Background Technology

[0002] Corrosion and related stress corrosion and corrosion fatigue are among the main forms of failure of marine engineering materials, posing a great threat to various marine engineering projects. Obtaining corrosion behavior parameters of marine engineering materials through experiments is an important foundation for marine engineering design, marine engineering material research and development and application.

[0003] The factors leading to material corrosion are numerous and complex. Internal factors include the material itself (primarily determined by composition, microstructure, and internal stress state), with different materials exhibiting different corrosion characteristics. External factors include environmental and load conditions. For marine engineering materials, load conditions affecting corrosion include constant stress loads, slow strain loads, and alternating cyclic loads. Therefore, stress loading devices are needed to test the corrosion performance of samples under different load conditions. During testing, the upper end of the sample needs to be mounted on the loading head of the stress loading device using clamps, and the lower end needs to be mounted on the stress loading support using clamps.

[0004] The existing technology lacks a positioning device on the stress loading bracket, which results in low sample installation efficiency and cannot ensure that the central axis of the sample is coaxial with the central axis of the loading head of the testing machine, leading to low accuracy of the test results.

[0005] In view of the above, this utility model is hereby proposed. Utility Model Content

[0006] The purpose of this invention is to propose a positioning device to solve the problem in the prior art that the lack of a positioning device on the stress loading bracket leads to low sample installation efficiency and the inability to ensure that the central axis of the sample is coaxial with the central axis of the loading head of the testing machine, resulting in low accuracy of the test results.

[0007] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0008] A positioning device is mounted on a stress loading bracket, the stress loading bracket including a crossbeam, a base, and a column. The stress loading device is mounted on the crossbeam and is used to apply various force loads to a specimen. The upper end of the specimen is mounted on the loading head of the testing machine of the stress loading device, and the lower end of the specimen is mounted on the base. A clamping assembly is mounted below the specimen. A slot is provided on the base, the clamping assembly is mounted in the slot, and the positioning device is mounted in the slot. The positioning device includes a positioning block with a V-shaped positioning groove and a V-shaped positioning protrusion on the clamping assembly. The V-shaped positioning protrusion engages with the V-shaped positioning groove.

[0009] The positioning device described in this utility model has a V-shaped positioning groove on the positioning block that matches the V-shaped positioning protrusion on the clamping assembly. This not only enables rapid positioning of the sample installation and improves the installation efficiency of the sample, but also ensures that the central axis of the sample is coaxially set with the central axis of the loading head of the testing machine, resulting in high accuracy of the test results.

[0010] Furthermore, the V-shaped positioning groove is located at the middle position on the side of the positioning block that is close to the clamping assembly.

[0011] Furthermore, the positioning device also includes a positioning screw and a compression spring. A first mounting hole and a first mounting groove are provided on the positioning block. The first mounting hole is used to install the positioning screw, and the first mounting groove is used to install the compression spring. The upper part of the compression spring contacts the base.

[0012] Furthermore, the first mounting hole is located at the center of the positioning block, and there are two first mounting slots, which are symmetrically arranged on both sides of the first mounting hole.

[0013] Furthermore, the line connecting the centers of the two first mounting slots is perpendicular to the direction of movement of the clamp assembly.

[0014] Furthermore, the card slot is generally in the shape of an inverted T, and the card slot includes a first slot and a second slot. The first slot is connected to the second slot. The first slot is horizontally arranged on the base, and the second slot is vertically arranged above the first slot. The positioning block is installed in the first slot.

[0015] Furthermore, the height of the positioning block is less than the height of the first groove.

[0016] Furthermore, the opening angle of the V-shaped positioning groove is α, which satisfies 70~130°.

[0017] Furthermore, the width of the positioning block is b1, and the width of the V-shaped positioning groove is b2, where b1 / b2 satisfies 6~7.

[0018] In a second aspect, this utility model provides a stress loading bracket, on which any of the positioning devices described in the present invention is installed.

[0019] Compared with the prior art, the positioning device and stress loading bracket of this utility model have the following advantages:

[0020] The positioning device and stress loading bracket described in this utility model have a V-shaped positioning groove on the positioning block that matches the V-shaped positioning protrusion on the clamping assembly. This not only enables rapid positioning of the sample installation and improves the installation efficiency of the sample, but also ensures that the central axis of the sample is coaxially set with the central axis of the loading head of the testing machine, resulting in high accuracy of the test results. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a stress loading bracket according to an embodiment of the present utility model;

[0022] Figure 2 This is a partial structural diagram of a positioning device installed on the base of a stress loading bracket according to an embodiment of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of a positioning device according to an embodiment of the present utility model;

[0024] Figure 4 This is a top view of a positioning device according to an embodiment of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the first clamp described in an embodiment of the present utility model;

[0026] Figure 6 This is a side view of the first clamp described in an embodiment of the present utility model;

[0027] Figure 7 This is a top view of the second clamp described in an embodiment of the present invention;

[0028] Figure 8 For along Figure 7 A cross-sectional view of the three-dimensional structure along the mid-section line BB;

[0029] Figure 9 This is a three-dimensional structural diagram of the third clamp described in an embodiment of the present utility model;

[0030] Figure 10This is a three-dimensional structural diagram of the fourth clamp described in an embodiment of the present utility model;

[0031] Figure 11 This is a three-dimensional structural diagram of the sample described in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Crossbeam; 2. Base; 21. Slot; 211. First slot; 212. Second slot; 3. Column; 4. Stress loading device; 5. Sample; 6. Positioning block; 61. V-shaped positioning groove; 62. First mounting hole; 63. First mounting groove; 7. Positioning screw; 8. Compression spring; 91. First clamp; 911. Second mounting hole; 912. Spherical convex surface; 92. Second clamp; 921. Third mounting hole; 922. Spherical concave surface; 923. Second mounting groove; 924. Third mounting groove; 93. Third clamp; 94. Fourth clamp; 941. Connecting part; 942. Positioning part; 901. V-shaped positioning protrusion. Detailed Implementation

[0034] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The descriptions of "first," "second," etc., mentioned in the embodiments of this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0035] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Example 1

[0036] The existing technology lacks a positioning device on the stress loading bracket, which results in low installation efficiency of specimen 5 and cannot ensure that the central axis of specimen 5 is coaxial with the central axis of the loading head of the testing machine, leading to low accuracy of the test results.

[0037] To solve the above technical problems, such as Figures 1-11 As shown, this embodiment proposes a positioning device, which is mounted on a stress-loading bracket, such as... Figure 1As shown, the stress loading support includes a crossbeam 1, a base 2, and a column 3. A stress loading device 4 is installed on the crossbeam 1. The stress loading device 4 is used to apply various force loads to the specimen 5. The upper end of the specimen 5 is installed on the testing machine loading head of the stress loading device 4, and the lower end of the specimen 5 is installed on the base 2. Figure 5 As shown, sample 5 is in the shape of a cylindrical rod. A clamping assembly is installed below sample 5, as follows: Figure 2 As shown, a slot 21 is provided on the base 2, the clamp assembly is installed in the slot 21, and a positioning device is installed in the slot 21. The clamp assembly is engaged with the positioning device; the positioning device includes a positioning block 6, such as... Figure 3 and Figure 4 As shown, a V-shaped positioning groove 61 is provided on the positioning block 6, such as... Figure 10 As shown, a V-shaped positioning protrusion 901 is provided on the clamp assembly, and the V-shaped positioning protrusion 901 engages with the V-shaped positioning groove 61.

[0038] The positioning device described in this embodiment is installed on the stress loading bracket. The V-shaped positioning groove 61 of the positioning block 6 matches the V-shaped positioning protrusion 901 of the fixture assembly. This not only enables rapid positioning of the sample 5 and improves the installation efficiency of the sample 5, but also ensures that the central axis of the sample 5 is coaxial with the central axis of the loading head of the testing machine, resulting in high accuracy of the test results.

[0039] Specifically, the V-shaped positioning groove 61 is located at the middle position on the side of the positioning block 6 that is close to the clamp assembly.

[0040] Specifically, such as Figure 2 As shown, the positioning device also includes a positioning screw 7 and a compression spring 8, such as... Figure 3 and Figure 4 As shown, a first mounting hole 62 and a first mounting groove 63 are provided on the positioning block 6. The first mounting hole 62 is used to install the positioning screw 7, and the first mounting groove 63 is used to install the compression spring 8. Figure 2 As shown, the upper part of the compression spring 8 is in contact with the base 2.

[0041] When the positioning screw 7 is tightened downwards, the positioning block 6 rises, and the compression springs 8 at both ends fix the positioning block 6.

[0042] Specifically, the positioning block 6 is made of high-strength alloy steel and its surface is heat-treated to improve its hardness and wear resistance, thereby extending its service life.

[0043] Specifically, such as Figure 2As shown, the card slot 21 is generally in an inverted T shape. The card slot 21 includes a first slot 211 and a second slot 212. The first slot 211 is connected to the second slot 212. The first slot 211 is horizontally arranged on the base 2, and the second slot 212 is vertically arranged above the first slot 211. The positioning block 6 is installed in the first slot 211.

[0044] Specifically, such as Figure 2 As shown, the height of the positioning block 6 is less than the height of the first groove 211, the length of the positioning block 6 is less than the length of the first groove 211, and the width of the positioning block 6 is less than the width of the first groove 211. This arrangement facilitates the positioning block 6 to rise when the positioning screw 7 is tightened downwards, and the compression springs 8 at both ends fix the positioning block 6 in place.

[0045] Specifically, such as Figure 3 and Figure 4 As shown, the first mounting hole 62 is located at the center of the positioning block 6, and there are two first mounting slots 63, which are symmetrically arranged on both sides of the first mounting hole 62.

[0046] Specifically, the line connecting the centers of the two first mounting slots 63 is perpendicular to the direction of movement of the clamp assembly.

[0047] Specifically, such as Figure 4 As shown, the opening angle of the V-shaped positioning groove 61 is α, and α satisfies: 70~130°.

[0048] More specifically, preferably, in this embodiment, the opening angle α of the V-shaped positioning groove 61 is 90°. This setting ensures the structural strength of the positioning structure.

[0049] Specifically, such as Figure 4 As shown, the width of the positioning block 6 is b1, and the width of the V-shaped positioning groove 61 is b2, and b1 / b2 satisfies: 6~7.

[0050] More specifically, preferably, in this embodiment, b1 / b2 = 6.4. This setting ensures the structural strength of the positioning structure.

[0051] Specifically, the clamping assembly includes a first clamp 91, a second clamp 92, a third clamp 93, and a fourth clamp 94.

[0052] The first clamp 91 and the second clamp 92 are used to clamp the lower end of the sample 5, and the third clamp 93 and the fourth clamp 94 are used to engage with the slot 21 of the base 2 and lock the sample 5.

[0053] A second mounting hole 911 is provided on the first fixture 91, and a third mounting hole 921 is provided on the second fixture 92. The lower end or the upper end of the sample 5 passes through the third mounting hole 921 and is installed in the second mounting hole 911.

[0054] A spherical convex surface 912 is provided above the first clamp 91, and a spherical concave surface 922 is provided on the second clamp 92. The spherical convex surface 912 and the spherical concave surface 922 cooperate with each other. The cooperation between the spherical convex surface 912 and the spherical concave surface 922 enables the clamp assembly to have a self-adjusting function for the coaxiality deviation between the sample 5 and the central axis of the loading head of the testing machine, resulting in high accuracy of the test results.

[0055] A second mounting groove 923 is provided on the second clamp 92, and the first clamp 91 is installed in the second mounting groove 923.

[0056] Specifically, the third clamp 93 is mounted on the fourth clamp 94, and the V-shaped positioning protrusion 901 is disposed on the fourth clamp 94.

[0057] More specifically, the fourth clamp 94 is in the shape of an inverted T, and the fourth clamp 94 is engaged with the slot 21.

[0058] More specifically, a connecting part 941 and a positioning part 942 are provided on the fourth clamp 94, the third clamp 93 is mounted on the connecting part 941, a third mounting groove 924 is provided on the second clamp 92, and the positioning part 942 is engaged with the first groove 211.

[0059] At the upper end of the specimen 5, the testing machine loading head of the stress loading device 4 is installed in the third mounting groove 924.

[0060] At the lower end of the sample 5, the connecting part 941 is installed in the third mounting groove 924.

[0061] More specifically, the V-shaped positioning protrusion 901 is disposed on the positioning part 942.

[0062] The upper end of the specimen 5 is mounted on the loading head of the stress loading device 4 via the first clamp 91 and the second clamp 92; the lower end of the specimen 5 is engaged with the slot 21 of the base 2 via the first clamp 91, the second clamp 92, the third clamp 93 and the fourth clamp 94, and the fourth clamp 94 engaged with the base 2 via the third clamp 93; the V-shaped positioning groove 61 of the positioning block 6 matches the V-shaped positioning protrusion 901 of the fourth clamp 94, which can realize the rapid positioning of the specimen 5.

[0063] During the debugging phase of the testing machine, the positioning block 6 is first installed in the first slot 211 of the slot 21 of the base 2. To apply the alternating tensile-compression load, when installing the specimen 5, the third clamp 93 and the fourth clamp 94 need to contact the lower end of the specimen 5 and apply a certain preload to achieve a locking effect, so as to avoid the problem of insufficient load application when the specimen 5 is subjected to the alternating tensile-compression load. In subsequent tests, the positioning block 6 does not need to be disassembled, which can achieve quick positioning for the next installation. Example 2

[0064] This embodiment proposes a stress loading bracket, on which any of the positioning devices described in Embodiment 1 are installed.

[0065] The stress loading bracket described above has the same advantages over the prior art as the positioning device described above, and will not be repeated here.

[0066] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A positioning device, characterized in that, The positioning device is installed on the stress loading bracket, which includes a crossbeam (1), a base (2) and a column (3). The stress loading device (4) is installed on the crossbeam (1). The stress loading device (4) is used to apply various force loads to the specimen (5). The upper end of the specimen (5) is installed on the testing machine loading head of the stress loading device (4), and the lower end of the specimen (5) is installed on the base (2). A clamping assembly is installed below the specimen (5). A slot (21) is provided on the base (2). The clamping assembly is installed in the slot (21). The positioning device is installed in the slot (21). The positioning device includes a positioning block (6). A V-shaped positioning groove (61) is provided on the positioning block (6). A V-shaped positioning protrusion (901) is provided on the clamping assembly. The V-shaped positioning protrusion (901) is engaged with the V-shaped positioning groove (61).

2. The positioning device according to claim 1, characterized in that, The V-shaped positioning groove (61) is located at the middle position on the side of the positioning block (6) that is close to the clamp assembly.

3. A positioning device according to claim 2, characterized in that, The positioning device further includes a positioning screw (7) and a compression spring (8). A first mounting hole (62) and a first mounting groove (63) are provided on the positioning block (6). The first mounting hole (62) is used to install the positioning screw (7), and the first mounting groove (63) is used to install the compression spring (8). The upper part of the compression spring (8) is in contact with the base (2).

4. A positioning device according to claim 3, characterized in that, The first mounting hole (62) is located at the center of the positioning block (6), and there are two first mounting slots (63), which are symmetrically arranged on both sides of the first mounting hole (62).

5. A positioning device according to claim 4, characterized in that, The center line connecting the two first mounting slots (63) is perpendicular to the direction of movement of the clamp assembly.

6. A positioning device according to claim 1, characterized in that, The card slot (21) is in the shape of an inverted T. The card slot (21) includes a first slot (211) and a second slot (212). The first slot (211) and the second slot (212) are connected. The first slot (211) is horizontally arranged on the base (2). The second slot (212) is vertically arranged above the first slot (211). The positioning block (6) is installed in the first slot (211).

7. A positioning device according to claim 6, characterized in that, The height of the positioning block (6) is less than the height of the first groove (211).

8. A positioning device according to claim 1, characterized in that, The opening angle of the V-shaped positioning groove (61) is α, and α satisfies: 70~130°.

9. A positioning device according to claim 1, characterized in that, The width of the positioning block (6) is b1, and the width of the V-shaped positioning groove (61) is b2, and b1 / b2 satisfies: 6~7.

10. A stress-loading support, characterized in that, The positioning device according to any one of claims 1 to 9 is installed on the stress-loading bracket.

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