CN216386569U - Simple structure of tensile jig - Google Patents

Abstract

The utility model discloses a stretching clamp with a simple structure, which comprises an upper clamp and a lower clamp. The upper clamp is composed of an upper clamp and two auxiliary clamp blocks A. The two auxiliary clamp blocks A have the same structure and are both parallel in longitudinal section. Quadrilateral, set back to back inside the upper clamping jaw, the auxiliary clamping block A is slidably connected with the inner wall of the upper clamping jaw, and the structure of the lower clamp is the same as that of the upper clamp. By adopting the tensile clamp with simple structure of the utility model, the clamping end of the sample does not need to be threaded, and the clamping surface of the brittle material sample is increased, so that the force is uniform, the risk of damage to the sample caused by stress concentration is reduced, and the structure is simple. The installation is convenient, the auxiliary clamping block is flexible and easy to take, the angle adjustment is simple, the sample to be tested is easy to take, and the sample to be tested can be quickly clamped, fixed and taken out.

Description

Simple tensile clamp

technical field

The utility model belongs to the technical field of testing devices, and relates to a tensile clamp with a simple structure.

Background technique

With the development of engineering technology, the aerospace industry has become more and more demanding on materials, so it is urgent to develop new high-temperature-resistant structural materials, and the development, testing and application of these materials all rely on accurate and perfect high-temperature mechanics of materials. Performance data, of which the test of high temperature tensile properties has become one of the very important parameters. Therefore, in order to support the development and application of high-temperature materials, it is urgent to develop a testing and characterization technology for high-temperature mechanical tensile properties of materials.

Room temperature brittle materials are difficult to machine threads or holes in tensile specimens, so common thread-like or hole-like tensile specimens cannot be used. In addition, materials with low hardness are often severely deformed after high temperature stretching, and the sample is not easy to take out. The dog-bone shape specimen is widely used in the tensile test of brittle materials at room temperature. During the test, the specimen is clamped by the surfaces, inclined surfaces or arc surfaces at both ends and the tensile load is transmitted. For these alloy materials with high room temperature brittleness and low ductility, it is easy to cause the samples to slip and not be clamped and the samples to be crushed, thus affecting the results of the tensile test.

Utility model content

The purpose of the utility model is to provide a tensile fixture with a simple structure, which solves the problem that the existing tensile fixture needs to process threads or holes on the tensile sample and is not suitable for tensile tests of high temperature brittle materials.

The technical scheme adopted by the utility model is that a tensile clamp with a simple structure includes an upper clamp and a lower clamp, the upper clamp is composed of an upper clamp and two auxiliary clamp blocks A, and the two auxiliary clamp blocks A have the same structure. The longitudinal sections are all parallelograms, and are arranged back-to-back inside the upper clamping jaws. The auxiliary clamping block A is slidably connected to the inner wall of the upper clamping jaws. The structure of the lower clamp is the same as that of the upper clamp.

Among them, the lower clamp is composed of a lower clamping jaw and two auxiliary clamping blocks B. The two auxiliary clamping blocks B have the same structure, and the longitudinal sections are both parallelograms. connect.

A pull-down rod is fixed in the middle of the bottom surface of the lower jaw, and the outer wall of the pull-down rod is provided with a threaded groove.

An upper pull rod is fixed in the middle of the top surface of the upper clamping jaw, and a thread groove is formed on the outer wall of the upper pull rod.

The upper clamping jaw is composed of the top plate, the left plate A and the right plate A fixedly connected, and the distance between the left plate A and the right plate A gradually decreases from top to bottom.

The lower clamping jaw is composed of a bottom plate, a left plate B and a right plate B which are fixedly connected, and the distance between the left plate B and the right plate B gradually increases from top to bottom.

Upper clamps, lower clamps, upper and lower rods are made of high temperature alloys.

The beneficial effects of the present utility model are:

(1) With this tensile fixture device, the clamping end of the sample does not need to be threaded, and the clamping surface of the brittle material sample is also increased, so that the force is uniform and the risk of damage to the sample due to stress concentration is reduced;

(2) The structure is simple, the installation is convenient, the auxiliary clamping block is flexible and easy to take, the angle adjustment is simple, the sample to be tested is easy to take, and the sample to be tested can be quickly clamped, fixed and taken out;

(3) By adjusting the position of the auxiliary clamps in the upper and lower jaws, the axis of the sample to be tested can be adjusted to be parallel to the tensile direction, reducing the influence of the asymmetry of the specimen, ensuring the uniformity of the tensile load and the accurate test results , suitable for a variety of occasions;

(4) The specimen fixture made of high temperature alloy is resistant to high temperature and can carry out tensile test of brittle materials in high temperature environment.

Description of drawings

Fig. 1 is the structural representation of a kind of simple-structured tensile clamp of the present utility model;

Fig. 2 is the side structure schematic diagram of the upper clamp in a kind of tensile clamp with simple structure of the present invention;

Fig. 3 is a top view of the upper clamp in a simple structure of the tension clamp of the present invention.

In the figure, 1. Upper clamp, 2. Lower clamp, 3. Upper pull rod, 4. Pull down rod, 5. Sample to be tested, 11. Upper clamping jaw, 12. Auxiliary clamping block A, 21. Lower clamping jaw, 22 . Auxiliary clamping block B, 111. Top plate, 112. Left plate A, 113. Right plate A, 211. Bottom plate, 212. Left plate B, 213. Right plate B.

,Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

The utility model is a tensile clamp with a simple structure. Referring to FIG. 1 and FIG. 2 , it includes an upper clamp 1 and a lower clamp 2. The upper clamp 1 is composed of an upper clamp 11 and two auxiliary clamp blocks A12. The two auxiliary clamp blocks The structure of A12 is the same, and the longitudinal section is parallelogram. , move down, the structure of the lower clamp 2 is the same as that of the upper clamp 1, the lower clamp 2 is composed of the lower clamping jaw 21 and two auxiliary clamping blocks B22, the two auxiliary clamping blocks B22 have the same structure, and the longitudinal sections are all parallelograms. Inside the clamping jaw 21, the auxiliary clamping block B22 is slidably connected with the inner wall of the lower clamping jaw 21, that is, the auxiliary clamping block B can move left, right, up and down along the inner wall of the lower clamping jaw.

Referring to FIG. 3 , a cylindrical pull-down rod 4 is fixed in the middle of the bottom surface of the lower jaw 21 , and the outer wall of the pull-down rod 4 is provided with a threaded groove. A cylindrical upper tie rod 3 is fixed in the middle of the top surface of the upper jaw 11, and the outer wall of the upper tie rod 3 is provided with a threaded groove, which is convenient for threaded connection with the tensile test device.

The upper clamp, lower clamp, upper pull rod and pull down rod are all made of high temperature alloy, which can be used in high temperature test.

The upper clamping jaw 11 is composed of a top plate 111 , a left plate A112 and a right plate A113 that are fixedly connected, and the distance between the left plate A112 and the right plate A113 gradually decreases from top to bottom.

The lower clamping jaw 21 is composed of the bottom plate 211 , the left side plate B212 and the right side plate B213 fixedly connected, and the distance between the left side plate B212 and the right side plate B213 gradually increases from top to bottom.

When using a tensile fixture with a simple structure of the present invention, firstly, the upper fixture 1 is threadedly connected to the upper part of the tensile test device through the upper pull rod 3, and the lower fixture 2 is threadedly connected to the lower part of the tensile test device through the pulldown rod 4, and then The dumbbell-shaped sample to be tested 5 is fixed between the upper and lower clamps by adjusting the positions of the auxiliary clamp block A12 and the auxiliary clamp block B22 in the upper and lower jaws, and the axis of the sample to be tested is consistent with the stretching direction After the test, the sample can be quickly taken out by moving the auxiliary clamp block A12 and the auxiliary clamp block B22 left and right. The tensile fixture device is especially suitable for the tensile test of brittle materials in high temperature environment. It does not need to process threads on the sample, and the clamping surface of the brittle material sample is increased, so that the force is uniform and the damage to the sample due to stress concentration is reduced. risk, the device can also be used in normal temperature tensile tests, with a wide range of applications.

Claims (7)

1. A tensile clamp with a simple structure, characterized in that it comprises an upper clamp (1) and a lower clamp (2), and the upper clamp (1) is composed of an upper jaw (11) and two auxiliary clamping blocks A (12) The structure of the two auxiliary clamping blocks A (12) is the same, and the longitudinal sections are both parallelograms. The structure of the lower clamp (2) is the same as that of the upper clamp (1). 2. A kind of tensile clamp with a simple structure according to claim 1, characterized in that, the lower clamp (2) is composed of a lower clamping jaw (21) and two auxiliary clamping blocks B (22), two The auxiliary clamping block B (22) has the same structure, the longitudinal section is a parallelogram, is arranged back to back inside the lower clamping jaw (21), and the auxiliary clamping block B (22) is slidably connected to the inner wall of the lower clamping jaw (21). 3. A simple-structured stretching clamp according to claim 2, characterized in that, a pull-down rod (4) is fixed in the middle of the bottom surface of the lower jaw (21), and a thread groove is formed on the outer wall of the pull-down rod (4). . 4 . The simple-structured stretching fixture according to claim 3 , wherein an upper pull rod ( 3 ) is fixed in the middle of the top surface of the upper jaw ( 11 ), and the outer wall of the upper pull rod ( 3 ) is provided with threads. 5 . groove. 5 . The simple-structured stretching fixture according to claim 1 , wherein the upper jaw ( 11 ) consists of a top plate ( 111 ), a left plate A ( 112 ) and a right plate A ( 113 ). 6 . ) is fixedly connected, and the distance between the left side panel A (112) and the right side panel A (113) gradually decreases from top to bottom. 6 . The simple-structured stretching fixture according to claim 2 , wherein the lower clamping jaw ( 21 ) consists of a bottom plate ( 211 ), a left side plate B ( 212 ) and a right side plate B ( 213 ). 7 . ) is fixedly connected, and the distance between the left side panel B (212) and the right side panel B (213) gradually increases from top to bottom. 7. A kind of tensile clamp with a simple structure according to claim 4, characterized in that, the upper clamp (1), the lower clamp (2), the upper pull rod (3) and the pull down rod (4) are all made of high temperature Made of alloy.

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