High-frequency fatigue wide plate centering and stretching clamp

Abstract

The utility model relates to the technical field of material mechanics test devices, and discloses a high-frequency fatigue wide plate centering tensile fixture which comprises a chuck assembly, a plate sample is detachably mounted at the bottom end of the chuck assembly, and the chuck assembly comprises a fixture body. The top end of the clamp body is in threaded connection with a clamp connecting disc through a locking bolt, the top end of the clamp body is fixedly connected with a clamp positioning column, the bottom end of the clamp body is in threaded connection with a clamp pressing disc through a pressing disc connecting bolt, and the inner wall of the clamp body is in threaded connection with a guide column through a guide column fixing bolt. The upper end of the clamp pressing disc is in threaded connection with an upper guide plate through a guide plate fixing bolt, and the lower end of the clamp pressing disc is in threaded connection with a lower guide plate through a guide plate fixing bolt. According to the utility model, through the arrangement of the chuck assembly, the plate does not need to be holed during the tensile test of the plate, so that the test value is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of material mechanics testing devices, in particular to a high-frequency fatigue wide plate centering stretching fixture. Background Art

[0002] High frequency fatigue refers to the fatigue process that a material undergoes under high frequency cyclic loading. This usually involves repeatedly loading and unloading the material over a short period of time, rather than applying a continuous load over a longer period of time. High frequency fatigue usually occurs when a material is subjected to rapid vibration or cyclic loading, which can lead to fatigue damage and eventual failure of the material.

[0003] After the plates are produced, they usually need to be subjected to tensile tests to detect the tensile properties of the plates. Currently, most plate tensile fixtures on the market use pin-type tensile fixtures. For wide plate specimens, a single opening is not enough to ensure the centering of the specimen; and multiple sets of openings lead to stress concentration around the holes and deformation of the holes, thus affecting the accuracy of the test; therefore, it is not possible to perform tensile tests on wide plates. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a high-frequency fatigue wide plate centering tensile fixture, which solves the problem mentioned in the background art that when performing a tensile test on a plate, holes need to be drilled in the plate, and opening multiple groups of holes will affect the accuracy of the test.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a high-frequency fatigue wide plate centering stretching fixture, including a chuck assembly, a plate sample is detachably installed on the bottom end of the chuck assembly, the chuck assembly includes a clamp body, the top end of the clamp body is threadedly connected to the clamp connecting plate by a locking bolt, the top end of the clamp body is fixedly connected to the clamp positioning column, the bottom end of the clamp body is threadedly connected to the clamp pressure plate by a pressure plate connecting bolt, the inner wall of the clamp body is threadedly connected to the guide column by a guide column fixing bolt, the upper end of the clamp pressure plate is threadedly connected to the upper guide plate by the guide plate fixing bolt, the lower end of the clamp pressure plate is threadedly connected to the lower guide plate by the guide plate fixing bolt, the left and right ends of the clamp body are threadedly connected to the push bolts, the inner wall of the clamp pressure plate is slidably connected to the clamp block, the outer walls of the upper guide plate and the lower guide plate are both provided with protrusions B, and the two ends of the clamp block are both provided with grooves A.

[0006] Preferably, the top end of the clamp body contacts the bottom end of the clamp connection plate.

[0007] Preferably, the top end of the guide column is plugged into the inner wall of the bottom end of the clamp body.

[0008] Preferably, the outer walls of the upper guide plate and the lower guide plate are in contact with the outer wall of the clamp pressure plate.

[0009] Preferably, the bottom end of the push bolt contacts the top end of the clamping block.

[0010] Preferably, the outer wall of the protrusion B is plugged into the inner wall of the groove A.

[0011] Preferably, the outer wall of the clamp pressure plate is fixedly connected to a chuck disassembly auxiliary plate via plate fixing bolts.

[0012] Preferably, the bottom end of the guide column passes through the clamp pressure plate.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the present invention, the width of the plate sample can reach 250 mm. The present invention uses a clamp to clamp the plate sample, and there is no need to open multiple sets of holes on the plate sample. This can avoid the stress concentration caused by opening holes on the plate sample and the tearing of the plate sample at the hole position caused by the opening of holes.

[0015] 2. In the utility model, the two clamps are symmetrically distributed and move in the center during operation, which can ensure that the plate sample is evenly stressed and solve the problem of limited stretching space of the plate sample, and can better be compatible with large-sized plate samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the connection plate, the sub-plate and the guide column of the knot clamp of the utility model;

[0018] Figure 3 It is a left-side structural schematic diagram of the chuck assembly of the utility model;

[0019] Figure 4 It is a schematic structural diagram of the relationship between the groove on the clamp block and the protrusion on the upper guide plate of the utility model.

[0020] Legend:

[0021] 1. Chuck assembly; 2. Plate specimen; 3. Chuck disassembly auxiliary plate; 4. Plate fixing bolt; 101. Clamp positioning column; 102. Clamp connecting plate; 103. Locking bolt; 104. Push bolt; 105. Clamp body; 106. Clamp pressure plate; 107. Guide column; 108. Guide column fixing bolt; 109. Pressure plate connecting bolt; 111. Clamp block; 112. Guide plate fixing bolt; 113. Upper guide plate; 114. Lower guide plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 4 The utility model provides a high-frequency fatigue wide plate centering tensile fixture, including a clamp assembly 1, through which the plate to be tested is clamped, and the characteristic is that: the bottom end of the clamp assembly 1 is detachably mounted with a plate sample 2; through the clamp assembly 1 to clamp the plate sample 2, when the plate sample 2 is tested, it is not necessary to open a hole on the plate sample 2, the clamp assembly 1 includes a clamp body 105, and the clamp body 105 is provided with two groups, such as Figure 1 As shown, the top of the clamp body 105 is threadedly connected to the clamp connecting plate 102 through a locking bolt 103. The locking bolt 103 allows the clamp body 105 and the clamp connecting plate 102 to be disassembled, thereby facilitating replacement. In addition, the locking bolt 103 is adjusted to eliminate the thread gap and lock the clamp. The clamp connecting plate 102 is connected to the testing machine. The top of the clamp body 105 is fixedly connected to a clamp positioning column 101, which is located at the center of the clamp connecting plate 102 to facilitate the connection between the clamp connecting plate 102 and the testing machine.

[0024] Furthermore, the bottom end of the clamp body 105 is threadedly connected to the clamp pressure plate 106 through a pressure plate connecting bolt 109. The setting of the pressure plate connecting bolt 109 makes it more convenient for relevant personnel to assemble and the operation is simple. The inner wall of the clamp body 105 is threadedly connected to the guide column 107 through the guide column fixing bolt 108. The setting of the guide column 107 makes the installation of the clamp pressure plate 106 and the clamp body 105 more efficient, because the guide column 107 can play a positioning role to avoid installation errors during installation. The upper end of the clamp pressure plate 106 is threadedly connected to the upper guide plate 113 through the guide plate fixing bolt 112, and the lower end of the clamp pressure plate 106 is threadedly connected to the lower guide plate 114 through the guide plate fixing bolt 112. When the upper guide plate 113 and the lower guide plate 114 are the same in size and shape, the only difference is that the position of the clamp pressure plate 106 is different.

[0025] Furthermore, the left and right ends of the clamp body 105 are threadedly connected with push bolts 104, and the inner wall of the clamp pressure plate 106 is slidably connected with a clamp block 111, which is connected to the plate sample 2. The distance between the clamp blocks 111 is controlled by adjusting the pressure plate connecting bolts 109 to complete the clamping of the plate sample 2. Two groups of clamp blocks 111 are provided, and are symmetrically distributed. The outer walls of the upper guide plate 113 and the lower guide plate 114 are provided with protrusions B, and both ends of the clamp block 111 are provided with grooves A. The setting of the protrusions B and the grooves A prevents the clamp block 111 from slipping after installation. The top end of the clamp body 105 contacts the bottom end of the clamp connecting plate 102. The contact between the clamp body 105 and the clamp connecting plate 102 can improve the stability of the overall device after installation. The top end of the guide column 107 is plugged into the inner wall of the bottom end of the clamp body 105, and is fixed to the guide column 107 through the guide column fixing bolt 108 to complete the positioning function.

[0026] Furthermore, the outer walls of the upper guide plate 113 and the lower guide plate 114 are in contact with the outer wall of the clamp pressure plate 106, and the bottom end of the push bolt 104 is in contact with the top end of the clamp block 111. The clamp block 111 and the clamp pressure plate 106 are separated by adjusting the push bolt 104. The outer wall of the protrusion B is plugged into the inner wall of the groove A. The protrusion B can slide smoothly in the groove A without detaching. The outer wall of the clamp pressure plate 106 is fixedly connected to the chuck disassembly auxiliary plate 3 by the plate fixing bolt 4. When the disassembly chuck disassembly auxiliary plate 3 is damaged, it can be replaced. The bottom end of the guide column 107 passes through the clamp pressure plate 106, and the guide column 107 facilitates the alignment and installation of the clamp pressure plate 106.

[0027] Working principle: first install the chuck assembly 1 as a whole, then connect the fixture connecting plate 102 to the testing machine, so that the fixture positioning column 101 is located at the bottom of the testing machine, and then connect the fixture positioning column 101 to the bottom of the testing machine to complete the installation, and then put the plate sample 2 between the two sets of clamp pressure plates 106, and then adjust the push bolts 104 to make the two sets of clamps 111 move, and then clamp and fix the plate sample 2, and then the relevant personnel perform a tensile test on the plate sample 2, so as to avoid the need to drill holes in the plate during the traditional tensile test operation, so as to increase the accuracy of the test of the plate sample 2, and at the same time, the two sets of clamps 111 are symmetrically distributed, so that the plate sample 2 is evenly stressed and the operation is simple and convenient.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-frequency fatigue wide plate centering and stretching fixture, comprising a clamp assembly (1), characterized in that: A plate sample (2) is detachably mounted on the bottom end of the chuck assembly (1); The clamp assembly (1) comprises a clamp body (105), the top end of the clamp body (105) is threadedly connected to a clamp connection plate (102) via a locking bolt (103), the top end of the clamp body (105) is fixedly connected to a clamp positioning column (101), the bottom end of the clamp body (105) is threadedly connected to a clamp pressure plate (106) via a pressure plate connecting bolt (109), the inner wall of the clamp body (105) is threadedly connected to a guide column (107) via a guide column fixing bolt (108), and the upper end of the clamp pressure plate (106) is fixedly connected to a clamp connection plate (102). An upper guide plate (113) is threadedly connected via a guide plate fixing bolt (112); the lower end of the clamp pressure plate (106) is threadedly connected to a lower guide plate (114) via a guide plate fixing bolt (112); the left and right ends of the clamp body (105) are threadedly connected to push bolts (104); the inner wall of the clamp pressure plate (106) is slidably connected to a clamp block (111); the outer walls of the upper guide plate (113) and the lower guide plate (114) are both provided with protrusions (B); and both ends of the clamp block (111) are provided with grooves (A).

2. The high-frequency fatigue wide plate centering and stretching fixture according to claim 1 is characterized by: The top end of the clamp body (105) contacts the bottom end of the clamp connection plate (102).

3. The high-frequency fatigue wide plate centering and stretching fixture according to claim 1 is characterized in that: The top end of the guide column (107) is plugged into the inner wall of the bottom end of the clamp body (105).

4. The high-frequency fatigue wide plate centering and stretching fixture according to claim 1 is characterized in that: The outer walls of the upper guide plate (113) and the lower guide plate (114) are in contact with the outer wall of the clamp pressure plate (106).

5. The high-frequency fatigue wide plate centering and stretching fixture according to claim 1 is characterized in that: The bottom end of the push bolt (104) contacts the top end of the clamping block (111).

6. The high-frequency fatigue wide plate centering and stretching fixture according to claim 1 is characterized by: The outer wall of the protrusion (B) is plugged into the inner wall of the groove (A).

7. The high-frequency fatigue wide plate centering and stretching fixture according to claim 1 is characterized by: The outer wall of the clamp pressure plate (106) is fixedly connected to a clamp disassembly auxiliary plate (3) via a plate fixing bolt (4).

8. The high-frequency fatigue wide plate centering and stretching fixture according to claim 1 is characterized by: The bottom end of the guide column (107) passes through the clamp pressure plate (106).

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