Hydraulic clamp for electro-hydraulic servo fatigue testing machine

A technology of fatigue testing machine and hydraulic fixture, which is applied in the direction of applying repeated force/pulsation force to test the strength of materials, measuring devices, instruments, etc., which can solve problems such as damage and deformation of samples, so as to ensure accuracy and reduce the probability of fracture , Improve the efficiency of fatigue test

Pending Publication Date: 2021-08-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of damage to the surface of the sample caused by the sawtooth sinking into the sample when the wedge-shaped clamp used in the traditional hydraulic clamp is clamped, or the invalid test result caused by the fracture of the clamping end; In order to solve the problem that the sample

Method used

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  • Hydraulic clamp for electro-hydraulic servo fatigue testing machine
  • Hydraulic clamp for electro-hydraulic servo fatigue testing machine
  • Hydraulic clamp for electro-hydraulic servo fatigue testing machine

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Embodiment Construction

[0032] In order to further understand the present invention, the present invention is described below in conjunction with examples, but the examples are only to further illustrate the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0033] In order to solve the inconvenience of manual operation caused by manual repeated locking of mechanical fixtures used in traditional high-temperature tests, and to reduce the test cost of material research and development, the present invention designs a set of Electro-hydraulic servo Hydraulic grips for fatigue testing machines.

[0034] Such as Figure 1-4 As shown, the hydraulic clamp includes an upper clamp 2 and a lower clamp 1 with the same structure. Both the upper clamp and the lower clamp include a locking thread 101, a clamp outer cover and an annular clamp block 102, wherein: the clamp outer cover is formed by the clamp shell 103 and the end cover 104 are sealed and fo...

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Abstract

The invention discloses a hydraulic clamp for an electro-hydraulic servo fatigue testing machine, and belongs to the technical field of electro-hydraulic servo fatigue testing machines. The hydraulic clamp comprises an upper clamp body and a lower clamp body which are the same in structure, each of the upper clamp body and the lower clamp body comprises a locking thread, a clamp outer sleeve and an annular clamping block, each clamp outer sleeve is formed by connecting a chuck shell and an end cover in a sealed mode, and each of the chuck shell and the end cover is provided with a stepped annular cavity; the annular clamping block is placed in the annular cavity of the chuck shell, the annular clamping block is used for clamping a test sample, and a piston is accommodated in the annular cavity of the end cover; the annular clamping block is connected with the piston through a circular base plate; and the piston can reciprocate along the axis of the annular clamping block under the action of hydraulic pressure, so that the annular clamping block is driven to clamp a test sample or release the test sample. According to the clamp, the fracture probability of the sample clamping end in the fatigue test process is reduced, and the fatigue test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electro-hydraulic servo fatigue testing machines, in particular to a hydraulic fixture for electro-hydraulic servo fatigue testing machines. Background technique [0002] In the actual engineering application process, fatigue damage is one of the main ways of failure of structural materials. According to statistics, the failure of components caused by fatigue accounts for about 80% of all component failures. Moreover, fatigue fractures are often characterized by suddenness and catastrophe, and the resulting losses are generally huge. Therefore, the fatigue problem of materials is an inevitable main link before the actual application of components. To ensure the service safety of components, it is necessary to be able to accurately, safely and quickly measure the fatigue properties of materials. [0003] Fatigue test is a highly specialized test, which has high requirements on test equipment, samples and ...

Claims

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Application Information

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IPC IPC(8): G01N3/04G01N3/36
CPCG01N3/04G01N3/36
Inventor 王学刚段启强张哲峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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