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Tensile fixture

A fixture and collet technology, applied in instruments, measuring devices, scientific instruments, etc., can solve the problems of loose fixtures and inability to reliably clamp small samples, and achieve slack compensation, continuous and stable pre-tightening effects, and stable clamping. Effect

Active Publication Date: 2014-12-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a tensile fixture, which solves the problem that the existing fixture cannot reliably clamp tiny samples and the fixture will relax under high temperature

Method used

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Such as figure 1 , figure 2 , Fig. 3 (A), shown in Fig. 3 (B), the embodiment of the present invention comprises frame 1, left guide rail 2, right guide rail 3, left chuck 4 and right chuck 5, and described frame 1 bottom has inverted Tapered clamping hole 1-1, the left and right guide rails 2 and 3 are respectively embedded in the left and right side walls of the clamping hole 1-1, and the left chuck 4 and the right chuck 5 are located in the clamping hole, and are respectively connected with The left guide rail 2 and the right guide rail 3 slide fit;

[0029] As shown in Fig. 3 (A) and Fig. 3 (B), the upper part of the frame 1 has a rectangular operating hole 1-2, and there is a partition integrated with the frame 1 between the clamping hole 1-1 and the operating hole 1-2. The plates 1-3 are separated; the left and right sides of the lower ...

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Abstract

The invention provides a tensile fixture, which belongs to the field of fixtures. The tensile fixture overcomes the problems that a conventional fixture cannot reliably clamp a tiny sample and becomes slack at high temperature and is especially applicable to tensile test of tiny samples under the conditions of normal temperature and high temperature. According to the invention, an elastic force released by a longitudinal spring exerts a continuous pretightening effect on a sample, the pretightening effect is more continuous and stable compared with a pretightening effect of a screw, and operation in the invention is simpler; in the process of drawing, the clamp force of a chuck increases with increase of a tensile force, a pretightening force can be continuously maintained at the same time, so relaxation of a material caused by thermal expansion can be effectively compensated, which guarantees that the sample is stably clamped and prevented from slipping in the process of drawing; and thus, the problems of slipping of a tiny sample caused by thermal expansion, a small size and the like in the process of drawing, inconvenient clamping and the like are effectively overcome.

Description

technical field [0001] The invention belongs to the category of fixtures, in particular to a tensile fixture, which is especially suitable for tensile tests of tiny samples under normal temperature and high temperature conditions. Background technique [0002] Tensile testing is the most basic material performance test and a necessary step for material performance research and process development. Tensile testing at high temperature, due to thermal expansion of the sample and the fixture, the fixture pre-tightened at room temperature will relax at high temperature, making it difficult to effectively clamp the sample, resulting in slippage and inaccurate test results. [0003] In micro-forming research, because the sample is too small to be directly clamped on the existing tensile testing equipment, a special clamp is required for transition. And as the size of the sample decreases, the requirements for the fit tightness of the fixture chucks increase. [0004] The patent a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04
Inventor 王新云张茂金俊松邓磊姚頔
Owner HUAZHONG UNIV OF SCI & TECH
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