Novel plate tensile fatigue clamp
Through the bolt connection between threaded holes and spherical structures, the stress concentration and material consumption problems of large-scale plate fatigue fixtures are solved, and the stability and economy are improved.
Patent Information
- Application Number
- CN202421640275.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-11
AI Technical Summary
Existing large-scale plate fatigue fixtures are prone to stress concentration, resulting in fixture damage and micro-moving fatigue increase the risk of test failure, and at the same time, meeting strength needs by thickening materials will increase costs.
A new type of tension fatigue fixture for sheet materials is designed, using threaded holes and bolted connections with spherical structures to disperse the stress of the sheet materials, prevent stress concentration, and reduce material consumption.
Effectively prevent stress concentration, reduce the risk of fixture damage, reduce material consumption, and improve test stability and economicality.
Smart Images
Figure CN223091679U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sheet material performance testing, and particularly relates to a new type of tensile fatigue fixture for sheet materials. Background Art
[0002] In the prior art, fatigue is an important mechanical property parameter of materials. Testing the fatigue performance of raw materials is of great significance for predicting the service performance of structural components. Currently, the following problems exist in large sheet material fatigue fixtures:
[0003] 1. For test conditions with relatively large force values, relying solely on pin connections, large stress concentrations are likely to occur in the pins, fixtures, and sheet material specimens. The pins are extremely prone to fracture, the fixtures are damaged, and even fractures may occur at the pin hole positions of the characteristic parts.
[0004] 2. Compared with static tests, higher requirements are placed on the structural stability during fatigue tests. The pin hole connection method is simple in form but there are small gaps between structural connections. It is difficult to avoid fretting fatigue existing between the small gaps during actual fatigue tests. The fretting fatigue exerts impact loads on the pins, increasing the risk of test failure.
[0005] 3. Between the sheet material specimen and the fixture, it is often necessary to thicken to meet the strength requirements, but this method is prone to consuming materials and increasing costs.
[0006] Therefore, it is urgently necessary to design a new type of tensile fatigue fixture for sheet materials to solve the above problems. Summary of the Utility Model
[0007] The purpose of the utility model is to provide a new type of tensile fatigue fixture for sheet materials, so as to solve the problems that the existing large sheet material fatigue fixtures are prone to cause stress concentration, resulting in fixture damage, there are small gaps between the components in the fixture, increasing the risk of test failure, and the method of thickening between the sheet material specimen and the fixture to meet the strength requirements is material-consuming and cost-increasing.
[0008] To solve the above technical problems, the utility model provides a new type of tensile fatigue fixture for sheet materials, including a sheet material and a fixture body. A plurality of threaded holes are opened on the front end face of the sheet material. An installation groove is opened inside the fixture body, and a plurality of grooves are opened in the installation groove. One end of the sheet material is located in the installation groove.
[0009] Bolts are threadedly connected to each of the plurality of threaded holes. One end of the bolt passes through the threaded hole and is located in the groove.
[0010] Optionally, a first spherical structure is opened in the groove, and one end of the bolt is a second spherical structure and is adapted to the first spherical structure.
[0011] Optionally, the number of the threaded holes is the same as that of the grooves and they correspond to each other one by one.
[0012] Optionally, first arc surfaces are further provided on both sides of the plate, and second arc surfaces adapted to the first arc surfaces are formed on both inner walls of the installation groove.
[0013] In a novel plate stretching fatigue fixture provided by the utility model, it includes a plate and a fixture body. A plurality of threaded holes are formed in the front end surface of the plate. An installation groove is formed inside the fixture body. A plurality of grooves are formed in the installation groove. One end of the plate is located in the installation groove. Bolts are threadedly connected in a plurality of the threaded holes. One end of each bolt passes through the threaded hole and is located in the groove. When using the novel plate stretching fatigue fixture, it can not only disperse the stress of the plate and prevent stress concentration, but also reduce the consumption of the raw material of the plate. Description of the Drawings
[0014] Figure 1 is a schematic structural diagram of the novel plate stretching fatigue fixture provided by the utility model;
[0015] Figure 2 is an exploded view of the novel plate stretching fatigue fixture provided by the utility model. Detailed Embodiments
[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0017] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.
[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0019] The present utility model provides a new type of plate tensile fatigue fixture, the structure of which is as Figure 1 shown, including a plate 1 and a fixture body 2. A plurality of threaded holes 11 are opened on the front end face of the plate 1. An installation groove 21 is opened inside the fixture body 2. A plurality of grooves 22 are opened in the installation groove 21. One end of the plate 1 is located in the installation groove 21. Bolts 30 are threadedly connected in each of the plurality of threaded holes 11. One end of the bolt 30 passes through the threaded hole 11 and is located in the groove 22. When using the new type of plate tensile fatigue fixture, it can not only disperse the stress of the plate 1 and prevent stress concentration, but also reduce the consumption of the raw material of the plate 1.
[0020] Further, a first spherical structure is opened in the groove 22, and one end of the bolt 30 is a second spherical structure and is adapted to the first spherical structure.
[0021] Further, the number of the threaded holes 11 is the same as that of the grooves 22 and they correspond to each other one by one.
[0022] Further, first arc surfaces are also provided on both sides of the plate 1, and second arc surfaces adapted to the first arc surfaces are opened on both inner walls of the installation groove 21.
[0023] The working principle of the present utility model is as follows: First, place the plate 1 in the installation groove 21 on the fixture body 2 and make the plurality of threaded holes 11 correspond to the plurality of grooves 22 one by one. Then connect the plurality of bolts 30 to fix the plate 1. The two second arc surfaces in the fixture body 2 cooperate with the two arc surfaces on the plate 1 respectively to prevent sharp knocking of the specimen during the test, so as to have a large contact area and will not cause damage. Moreover, it can not only disperse the stress of the plate 1 and prevent stress concentration, but also reduce the consumption of the raw material of the plate 1.
[0024] The above description is only a description of the preferred embodiments of the present utility model, and does not limit the scope of the present utility model in any way. Any changes and modifications made by those of ordinary skill in the technical field of the present utility model according to the above disclosure shall fall within the protection scope of the claims.
Claims
1. A new type of stretching fatigue fixture for plates, comprising a plate (1) and a fixture body (2), characterized in that, A plurality of threaded holes (11) are formed in the front end surface of the plate (1). An installation groove (21) is formed inside the fixture body (2). A plurality of grooves (22) are formed in the installation groove (21). One end of the plate (1) is located in the installation groove (21). Bolts (30) are threadedly connected to the plurality of threaded holes (11). One end of each bolt (30) passes through the threaded hole (11) and is located in the groove (22).
2. The novel plate tensile fatigue fixture according to claim 1, characterized in that, A first spherical structure is formed in the groove (22). One end of the bolt (30) is a second spherical structure and is adapted to the first spherical structure.
3. The novel sheet material tensile fatigue fixture according to claim 1, characterized in that, The number of the threaded holes (11) is the same as that of the grooves (22) and they are in one-to-one correspondence.
4. The novel sheet material tensile fatigue fixture according to claim 1, characterized in that, First arc surfaces are further provided on both sides of the plate (1). Second arc surfaces adapted to the first arc surfaces are formed on both inner walls of the installation groove (21).