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High temperature fatigue test clamp for metal thin wall equal-wall thickness tube

A fatigue test, metal thin technology, used in the analysis of materials, the use of stable tension/pressure to test the strength of materials, measurement devices, etc., can solve the problems of long tube sample, poor sample size adaptability, large sample consumables, etc. , to achieve the effect of simple structure, saving sample material and wide adaptability

Inactive Publication Date: 2009-09-09
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical solution is only suitable for metal tube samples with sufficiently large wall thickness, and the adaptability of the sample size is poor; the working section of the tube sample is funnel-shaped rather than straight, and it is necessary to perform a test between the radial strain and the axial strain. There is a certain conversion error; the tube sample required for the special test limited by this technical plan is still long, and the sample consumables are relatively large
For medium and thin metal pipe fittings with equal thickness, there is currently no effective technical solution for uniaxial and multiaxial fatigue tests in high temperature environments

Method used

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  • High temperature fatigue test clamp for metal thin wall equal-wall thickness tube
  • High temperature fatigue test clamp for metal thin wall equal-wall thickness tube
  • High temperature fatigue test clamp for metal thin wall equal-wall thickness tube

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing and embodiment the utility model is further described.

[0014] combine Figure 1 to Figure 5 The basic structure and specific embodiments of the invention can be seen. A high-temperature fatigue test fixture for metal thin-walled and equal-thickness pipes has a main shaft (1), and the main shaft has a tapered clamping sleeve (11), a central threaded section (12) and a clamping section (13); a locking sleeve (2 ) and the transition sleeve (3) are sequentially sleeved on the tapered clamping sleeve (11) of the main shaft; the lock nut (5) is screwed on the middle threaded section (12) of the main shaft; ) is socketed on the clamping section (13) of the main shaft; the main shaft tapered clamping sleeve (11) is an elastic mechanism that can change the radial scale, and is generally a multi-lobed symmetrical layout structure, and a four-lobed outer cone is used here Structure, the symmetrical hole at the root of the cone can...

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Abstract

The invention discloses a high temperature fatigue test clamp for a metal thin wall equal-wall thickness tube, wherein, the test clamp is used for clamping the metal thin wall tube in a high temperature fatigue test. The clamp comprises a main shaft 1 which is provided with a taper-shaped clamp cover 11, a middle part worm segment 12 and a clamp segment 13; a lock sleeve 2 and a transition sleeve 3 are sheathed on the taper-shaped clamp cap 11 of the main shaft in sequence; a lock screw cap 5 is screwed on the middle part worm segment 12 of the main shaft; a clamp cushion cover 6 is sheathed with the main clamp segment 11 of the main shaft; and the taper-shaped clamp cover 11 of the main shaft and the clamp cushion cover 6 are both provided with elastic mechanisms with adjustable radial size. The invention can meet the combined fatigue test of pure torsion and shafting torsion of various scales of thin wall equal-wall thickness tubes under high temperature, has the advantages of simple structure, large specimen size adaptation range and prominent clamp function, and saves specimen material.

Description

Technical field [0001] The invention relates to material testing equipment, in particular to the manufacturing field of fixtures for high-temperature fatigue testing of metal thin-walled and equal-thickness pipes. 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 thin-walled pipe fittings have been widely used in engineering practice. Due to special clamping difficulties, it is difficult to carry out...

Claims

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Application Information

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IPC IPC(8): G01N3/04G01N3/18
Inventor 蔡力勋包陈陈洪军
Owner SOUTHWEST JIAOTONG UNIV
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