Multi-function extension clamp for material fatigue test
A fatigue test, multi-functional technology, applied in the analysis of materials, the use of stable tension / pressure test material strength, measurement devices, etc., can solve the difficulties of fatigue tests, can not achieve solid smooth clamping bar room temperature and high temperature fatigue tests , limited clamping force, etc., to achieve the effect of saving sample material, outstanding clamping function, and simple structure
Inactive Publication Date: 2012-09-19
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
The fixture disclosed in this patent can only realize the high temperature fatigue test of thin-walled and equal-wall-thick pipes, and the clamping force it can provide is limited. Room and elevated temperature fatigue tests on solid smooth gripped bars
At present, there is no effective technical solution for single- and multi-axial fatigue tests of equal-wall thin-walled and thick-walled pipes and solid bars with smooth clamping at both ends in a high-temperature environment.
Method used
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[0016] The present invention will be further described below in conjunction with drawings and embodiments.
[0017] combine Figure 1 to Figure 8 The basic structure and specific embodiments of the invention can be seen. The multifunctional material fatigue test extension fixture has a main shaft 1, the main shaft has a push rod 12, a limit boss 11, a middle threaded section 8 and a clamping section 13; the main shaft 1 and the sleeve 3 are connected by a lock nut 2, The locking nut 2 is screwed on the middle threaded section 8 of the main shaft 1; the transition ejector rod 5, the clamping pad sleeve 4 and the ejector rod 12 on the main shaft 1 are partially placed in the sleeve 3; the inside of the sleeve 3 is close to the sample The installation end is designed with a tapered inner hole, which can make the clamping pad 4 generate a squeezing force on the sample 7 after receiving the top force of the transition rod 5; the middle part of the sleeve 3 is provided with a symme...
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The invention discloses a multi-function extension clamp for a material fatigue test, which is used for clamping metal tubes with equal wall thickness and solid smooth clamping rods in fatigue tests at a normal temperature and a high temperature. A main shaft is provided with a mandril (12), a limit lug boss (11), a middle threaded section (8) and a clamping section (13); the main shaft is connected with a sleeve (3) through a cage nut (2), and the cage nut is screwed on the middle threaded section (8) of the main shaft; and a transition mandril (5), a clamping cushion sleeve (4) and the mandril (12) on the main shaft are arranged in the sleeve (3). The multi-function extension clamp can be used for single-shaft, pure-torsion and shaft-torsion compound fatigue tests on the tubes with equal wall thickness and the solid smooth clamping rods in various specifications at the normal temperature and the high temperature. The multi-function extension clamp has the advantages of simple structure, large application range of sample size, good clamping function, and sample material saving.
Description
technical field [0001] The invention relates to material testing equipment, in particular to the field of manufacturing single and multi-axis fatigue test fixtures for metal materials. Background technique [0002] The fatigue test of metal materials plays an important guiding role in the fatigue strength design of metal components. In order to examine the fatigue performance of metal components, metal materials are usually processed into solid bar samples for fatigue tests at room temperature and high temperature environments. The fatigue test technology for rod-shaped specimens is quite mature, and a series of corresponding fatigue test standards have been introduced internationally and domestically. However, with the rapid development of reactor engineering and chemical pressure vessel engineering, metal pipe fittings have been widely used in engineering practice. Due to the special clamping difficulties, it is difficult to carry out high temperature fatigue tests on me...
Claims
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IPC IPC(8): G01N3/04G01N3/18
Inventor 蔡力勋包陈陈洪军
Owner SOUTHWEST JIAOTONG UNIV