Large plate fatigue clamp
By using pins and special-shaped pins in large-scale plate fatigue fixtures and eliminating tiny gaps through the top column, the problems of stress concentration and test failure in the prior art are solved, and the service life of the fixture and the effectiveness of the test are improved.
Patent Information
- Application Number
- CN202421573588.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-04
AI Technical Summary
Existing large-scale plate fatigue fixtures are prone to stress concentration under test conditions with large force values, resulting in high risk of fixture damage and test failure.
A large-scale plate fatigue fixture was designed. By inserting pins and two special-shaped pins on the front end of the fixture, and applying pressure to the top column through the tester, the tiny gap between the fixture and the plate is eliminated, and the force value is dispersed, and stress concentration is avoided.
It effectively improves the life of the pin, avoids the risk of fixture damage and test failure, and ensures the effective conduct of the test.
Smart Images
Figure CN222825377U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plate performance testing, in particular to a large plate fatigue fixture. Background Art
[0002] In the existing technology, 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 parts. At present, large plate fatigue fixtures have the following problems:
[0003] 1. For test conditions with larger force values, if only pins are used for connection, the pins, fixtures and plate specimens are prone to large stress concentration, which may cause pin breakage, fixture damage, and even pin hole breakage of feature parts.
[0004] 2. Compared with static tests, fatigue tests require higher stability of the structure. The pin hole connection method is simple in form, but there are tiny gaps between the structural connections. It is difficult to avoid micro-motion fatigue between the tiny gaps during actual fatigue tests. Micro-motion fatigue applies impact loads to the pins, increasing the risk of test failure.
[0005] Therefore, it is urgent to design a new type of large-scale plate fatigue fixture to solve the above problems. Utility Model Content
[0006] The utility model aims to provide a large plate fatigue fixture to solve the problems that the existing large plate fatigue fixture is prone to stress concentration, thereby causing fixture damage, and there are small gaps between the components in the fixture, thereby increasing the risk of test failure.
[0007] In order to solve the above technical problems, the utility model provides a large plate fatigue clamp, comprising a plate and a clamp body, wherein a clamp groove is opened in the center of the clamp body, one end of the plate is located in the clamp groove, and a pin and two special-shaped pins are inserted in the front end surface of the clamp body;
[0008] A cylinder is fixed at one end of the clamp body, a hole is opened at one end of the cylinder, and a top column is arranged in the hole.
[0009] Optionally, a first circular arc is formed on both sides of the plate, and a second circular arc matching the first circular arc is formed on both of the two special-shaped pins.
[0010] Optionally, the outer wall of the cylinder is also provided with an external thread.
[0011] The utility model provides a large plate fatigue fixture, which includes a plate and a fixture body, a clamping groove is opened in the center of the fixture body, one end of the plate is located in the clamping groove, a pin and two special-shaped pins are inserted in the front end face of the fixture body, a cylinder is fixed to one end of the fixture body, a hole is opened at one end of the cylinder, and a top column is arranged in the hole; when the large plate fatigue fixture is used, on the basis of the force applied to the pin, the two special-shaped pins simultaneously participate in the force and disperse the force value, thereby avoiding stress concentration in a certain part of the plate, which can effectively improve the service life of the pin, and the small gaps between the plate and the fixture body, between the pin and the plate, and between the two special-shaped pins and the plate are eliminated by applying pressure to the top column through the testing machine, thereby avoiding overshoot during loading and improving its service life, thereby ensuring the effective implementation of the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structure of the large plate fatigue fixture provided by the utility model;
[0013] Figure 2 This is an exploded view of a large plate fatigue fixture provided by the utility model. DETAILED DESCRIPTION
[0014] 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.
[0015] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0017] The utility model provides a large plate fatigue fixture, the structure of which is as follows Figure 1 As shown, it includes a plate 1 and a fixture body 2, a clamping groove 9 is opened in the center of the fixture body 2, one end of the plate 1 is located in the clamping groove 9, a pin 3 and two special-shaped pins 4 are inserted in the front end of the fixture body 2, a cylinder 6 is fixed to one end of the fixture body 2, a hole 8 is opened at one end of the cylinder 6, and a top column 5 is arranged in the hole 8. The use of a large plate fatigue fixture increases its service life and ensures the effective conduct of the test.
[0018] Furthermore, a first arc is formed on both sides of the plate 1, and a second arc matching the first arc is formed on the two special-shaped pins 4.
[0019] Furthermore, the outer wall of the cylinder 6 is provided with an external thread 7 .
[0020] The working principle of the utility model is as follows: on the basis of the force applied to the pin 3, the two special-shaped pins 4 simultaneously participate in the force and disperse the force value, thereby avoiding stress concentration in a certain part of the plate 1, which can effectively improve the service life of the pin 3, and the pressure applied to the top column 5 by the testing machine eliminates the tiny gaps between the plate 1 and the fixture body 2, between the pin 3 and the plate 1, and between the two special-shaped pins 4 and the plate 1, thereby avoiding overshoot during loading, improving its service life, and ensuring the effective implementation of the test.
[0021] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.
Claims
1. A large plate fatigue fixture, comprising a plate (1) and a fixture body (2), characterized in that: A clamping groove (9) is provided at the center of the clamp body (2), one end of the plate (1) is located in the clamping groove (9), and a pin (3) and two special-shaped pins (4) are inserted into the front end surface of the clamp body (2); A cylinder (6) is fixed to one end of the clamp body (2), a hole (8) is opened at one end of the cylinder (6), and a top column (5) is arranged in the hole (8).
2. The large plate fatigue fixture as claimed in claim 1, characterized in that: The plate (1) has first arcs on both sides, and the two special-shaped pins (4) have second arcs matching the first arcs.
3. The large plate fatigue fixture as claimed in claim 1, characterized in that: The outer wall of the cylinder (6) is also provided with an external thread (7).