CN219391589U

CN219391589U - Multi-angle pull-shear clamp for non-metallic materials convenient to disassemble and assemble

Info

Publication number: CN219391589U
Application number: CN202223441735.7U
Authority: CN
Inventors: 陈铁铸; 王学仁
Original assignee: Rocket Force University of Engineering of PLA
Current assignee: Rocket Force University of Engineering of PLA
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-07-21
Anticipated expiration: 2032-12-22

Abstract

The utility model relates to the technical field of material machinery, in particular to a multi-angle pulling and shearing clamp for nonmetallic materials, which is convenient to disassemble and assemble. The clamp comprises a pair of clamp bases and a pair of chucks, wherein the clamp bases are symmetrically arranged, guide rails are arranged on the clamp bases, guide rail grooves matched with the guide rails are formed in the tops of the chucks, connecting grooves used for clamping test pieces are further formed in the bottoms of the chucks, and the chucks can be replaced by different angles so as to carry out pull-shear tests on the test pieces at different angles. The utility model has simple and reliable structure, less needed parts and simple assembly operation, can effectively solve the problems of large test result error, poor reliability, initial damage of the test piece caused by the clamp and the like under the multi-angle pull-shear loading of the nonmetal test piece at macro and micro level, can select any value between 0 degrees and 90 degrees according to different angles required by the test to replace the clamping head in practical application, and greatly improves the test efficiency and the operation convenience.

Description

Multi-angle pull-shear clamp for non-metallic materials convenient to disassemble and assemble

Technical Field

The utility model relates to the technical field of material machinery, in particular to a multi-angle pulling and shearing clamp for nonmetallic materials, which is convenient to disassemble and assemble.

Background

In the related research of mechanical property test on nonmetallic materials, the mature related test is mostly carried out by single mechanical loading, and the loading mode of pull-shear is a test mode which is used more under complex load on nonmetallic materials at present, and the installation operation process of most of pull-shear clamps at present is complex and has more steps on a macroscopic level, so that the error of the pull-shear test process is increased due to external factors, such as a pull/press-shear composite loading test device loaded at any proportion and a using method thereof (application number: CN 202210740623.7); the fixture is also required to be perforated on the test piece, so that the probability of damage to the test piece is increased, the accuracy and reliability of a tensile shear test result are greatly affected, and the test device and the use method of the composite tensile/compressive shear under any angle are also disclosed (application number: CN 201910532575.0).

In the related test field of a micro-view level, in order to more clearly see the evolution process of a micro-view structure, an optical microscope, a scanning electron microscope or micro CT (computed tomography) observation equipment is often used for testing in combination with an adaptive clamp, a multi-angle pull shear clamp used on the micro CT at present is a micro clamp (application number: CN 2022221076089.6) for a multi-angle pull shear test of a non-metal material, although the clamp can theoretically realize any value between 0-90 degrees, the accuracy of the assembly position of a pull rod bolt connected with equipment in the patent greatly depends on the accuracy of the size of each part, and the clamp angle is difficult to measure more accurately after the whole assembly is completed; meanwhile, the clamp has the obvious defects that the used test piece and the connecting clamping block are connected to one block in a certain mode, so that the angle of the test piece can deviate when the test piece is pulled and sheared to load, the accuracy of internal tensile stress and shearing stress is low, the reliability of the result of research test is greatly reduced, and the efficiency and the progress of the research test can be seriously influenced due to the fact that the difficulty and the precision are high when the test piece is prepared.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides a multi-angle pull-shear clamp for nonmetallic materials, which is convenient to disassemble and assemble, so as to solve the problems in the background art.

The utility model discloses a multi-angle tension shear clamp for nonmetallic materials, which comprises a pair of clamp bases and a pair of chucks, wherein the clamp bases are symmetrically arranged, guide rails are arranged on the clamp bases, guide rail grooves matched with the guide rails are arranged at the tops of the chucks, connecting grooves for clamping a test piece are also arranged at the bottoms of the chucks, and the chucks can be replaced with different angles, so that tension shear tests of different angles are carried out on the test piece.

Preferably, the central axis of the connecting groove and the central axis of the chuck can form included angles with different angles, wherein the included angles range from 0 degree to 90 degrees.

Preferably, the pair of chucks are arranged such that a central axis of the connecting groove on one chuck coincides with a central axis of the connecting groove on the other chuck when the specimen is gripped.

Preferably, a pull shaft used for being connected with the test equipment is further arranged on one surface of the clamp base, which is far away from the guide rail.

Preferably, the test piece is double-trapezoid.

Preferably, the shape of the connecting groove is matched with the shape of the test piece.

Compared with the prior art, the utility model has the following technical effects:

the utility model has simple and reliable structure, less needed parts and simple assembly operation, can effectively solve the problems of large test result error, poor reliability, initial damage of the test piece caused by the clamp and the like under the multi-angle pull-shear loading of the nonmetal test piece at macro and micro level, can select any value between 0 degrees and 90 degrees according to different angles required by the test to replace the clamping head in practical application, and does not need to replace other parts, thereby greatly improving the test efficiency and the operation convenience.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the structure of the base of the clamp of the present utility model;

FIG. 3 is a schematic view of a chuck according to the present utility model;

FIG. 4 is a schematic view of a test piece according to the present utility model;

FIG. 5 is a schematic view of a 15 chuck according to the present utility model;

FIG. 6 is a schematic view of a 30 chuck according to the present utility model;

FIG. 7 is a schematic view of a 45 chuck according to the present utility model;

fig. 8 is a schematic view of a 60 ° chuck according to the present utility model.

Reference numerals: 1. a clamp base; 2. a chuck; 3. a test piece; 4. pulling a shaft; 5. a guide rail; 6. a connecting groove; 7. a guide rail groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Example 1

The utility model relates to a multi-angle pull-shear clamp for nonmetallic materials, which comprises a pair of clamp bases 1 and a pair of chucks 2, wherein the clamp bases 1 are symmetrically arranged, guide rails 5 are arranged on the clamp bases 1, guide rail 5 grooves matched with the guide rails 5 are arranged at the tops of the chucks 2, connecting grooves 6 for clamping a test piece 3 are also arranged at the bottoms of the chucks 2, and the chucks 2 can be replaced with different angles so as to carry out pull-shear tests on the test piece 3 at different angles. The central axis of the connecting groove 6 and the central axis of the chuck 2 can form included angles with different angles, wherein the included angles range from 0 degree to 90 degrees. The pair of chucks 2 is configured such that the center axis of the connecting groove 6 provided in one chuck 2 coincides with the center axis of the connecting groove 6 provided in the other chuck 2 when the test piece 3 is clamped. The surface of the clamp base 1 far away from the guide rail 5 is also provided with a pull shaft 4 used for being connected with test equipment. The test piece 3 is double-trapezoid. The shape of the connecting groove 6 is matched with that of the test piece 3. In this embodiment, as shown in fig. 1, the clamping head 2 and the clamp base 1 are both formed by being conveniently spliced, the guide rail 5 is matched with the guide rail 5 groove, the clamping head 2 is connected with the clamp base 1, the connecting groove 6 is matched with the test piece 3, and the test piece 3 is connected with the clamping head 2.

When the clamp is used, firstly, a pulling and shearing test is carried out by selecting a clamp head 2 with a required angle according to actual requirements, then the clamp head 2 is assembled with a clamp base 1, a guide rail 5 on the clamp base 1 is matched with a guide rail 5 groove on the clamp head 2 to transmit load, the relative position of the clamp head 2 can be adjusted through the guide rail 5, and further the centering of the center of a test piece 3 on the whole clamping equipment is controlled; clamping the clamp base 1 and related test equipment through a pull shaft 4; finally, the test piece 3 is assembled into the connecting groove 6 of the other chuck 2, so that the load of the test equipment can be transferred to the test piece 3 through the connection of the clamp base 1 and the chuck 2, and the tensile and shearing test of the test piece 3 is finished.

Example 2

This embodiment is substantially the same as embodiment 1, and is an improvement on embodiment 1. As shown in fig. 5, 6, 7 and 8, the present embodiment corresponds to the chucks 2 with different angles of 15 °, 30 °, 45 ° and 60 °, respectively, and the chucks 2 with different angles are replaced, so that the testing efficiency is improved, and the method is simple and convenient.

Claims

1. A multi-angle draws and cuts anchor clamps for nonmetallic material dismouting of being convenient for, a serial communication port, including a pair of anchor clamps base and a pair of chuck, anchor clamps base symmetry sets up, wherein is equipped with the guide rail on the anchor clamps base, the chuck top is equipped with the guide rail groove with guide rail assorted, and the bottom still is equipped with the spread groove that is used for the centre gripping test piece, the chuck can be replaced for different angles to carry out the tensile shear test of different angles to the test piece.

2. The multi-angle tension shear fixture for facilitating disassembly and assembly of nonmetallic materials according to claim 1, wherein the central axis of the connecting groove and the central axis of the chuck can form included angles with different angles, and the included angles range from 0 degrees to 90 degrees.

3. The multi-angle tension shear fixture for facilitating disassembly and assembly of nonmetallic materials as defined in claim 2, wherein the pair of clamps are adapted to clamp a test piece, wherein a central axis of the connecting slot on one clamp coincides with a central axis of the connecting slot on the other clamp.

4. The multi-angle tension shear fixture for facilitating disassembly and assembly of nonmetallic materials according to claim 3, wherein a pull shaft for connecting with test equipment is further arranged on one surface of the fixture base away from the guide rail.

5. The multi-angle tension shear fixture for facilitating disassembly and assembly of nonmetallic materials as recited in claim 4, wherein the test piece is double-trapezoid.

6. The multi-angle tension shear fixture for facilitating disassembly and assembly of nonmetallic materials as defined in claim 5, wherein the shape of the connecting groove is matched with the shape of the test piece.