Multifunctional high-temperature stretching clamp

Abstract

The invention relates to a multifunctional high-temperature stretching clamp. The multifunctional high-temperature stretching clamp comprises an upper clamp body and a lower clamp body, wherein the upper clamp body comprises an upper clamping block (1) and an upper draw bar (2) arranged above the upper clamping block (1); the upper draw bar (2) is a threaded rod; a slot is formed in the lower portion of the upper clamping block (1) and comprises a bottom guiding groove (7) and a clamping groove (6 ) connected with the bottom guiding groove (7); extending grooves (5) which extend outwards are respectively formed in the bottom and the top of the clamping groove ( 6); a sample to be tested is placed in the clamping groove (6) from the side surface; and a bar which is connected with the upper end of the sample to be tested is clamped in the guiding groove (7). During an experiment, a tension is applied to the upper end of the sample to be tested through the bottom of the clamping groove (6). The structure of a lower clamping block (3) is the same with or different from that of the upper clamping block (1). Compared with the prior art, the multifunctional high-temperature stretching clamp is suitable for various places, cannot damage parts, is convenient to use and simple in structure, and can quickly clamp and take out samples.

Description

technical field [0001] The invention relates to a stretching fixture, in particular to a multifunctional high-temperature stretching fixture. Background technique [0002] High-temperature tension is an important test method in static tension, and it can more truly reflect the mechanical properties of the sample under actual working conditions. In the prior art, the sample is usually fixed by clamps with threaded holes up and down, and then the tensile test is carried out at a certain temperature. [0003] In the actual operation of high temperature stretching, there are the following problems: [0004] 1) The standard bar-shaped sample with threads is connected to the upper and lower clamps through threads, which is inconvenient to operate and sometimes damages the sample during rotation; [0005] 2) For materials with low hardness such as aluminum and copper, it is difficult to remove due to deformation after high-temperature stretching. Sometimes the sample is broken in...

AI Technical Summary

Problems solved by technology

[0004] 1) The standard bar-shaped sample with threads is connected to the upper and lower clamps through threads, which is inconvenient to operate and sometimes damages the sample during rotation;

[0005] 2) For materials with low hardness such as aluminum and copper, it is difficult to remove due to deformation after high-temperature stretching. Sometimes the sample is broken in the thread, which is not convenient for sampling;

[0006] 3) In the special case of asymmetric axis (that is, the upper and lower clamps of the testing machine are not on the same straight line), since the sample will be subjected to a certain lateral force, the lateral force and the tensile force will form a resultant force, which will affect the accuracy of the test. Therefore, the clamping of the sample cannot be completed with ordinary threaded clamps;

[0007] 4) In the case of a large test volume, it is impossible to quickly clamp and take out the sample

The tensile fixture is not easy to damage the piece to be tested, and can achieve fast clamping, but it still does not solve the problem of inconvenient measurement when the upper and lower fixtures are not in the same axis

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