Profile stretching fixture and horizontal profile stretching testing machine

A fixture and profile technology, applied in the field of profile tensile fixtures and horizontal profile tensile testing machines, can solve problems such as difficult handling, inability to perform breaking tests, and inability to complete detection of mining profiles, to simplify the structure and avoid straightness. Not good, the effect of reducing friction

Inactive Publication Date: 2012-12-26
HENAN COAL SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the coal mine field, the mechanical performance requirements of profiles are high, and the existing testing machines are difficult to cope with. Due to their own design defects, the existing testing machines are basically unable to perform breaking tests and cannot complete the complete inspection of mining profiles.

Method used

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  • Profile stretching fixture and horizontal profile stretching testing machine
  • Profile stretching fixture and horizontal profile stretching testing machine
  • Profile stretching fixture and horizontal profile stretching testing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment one: see figure 1 , figure 2 , image 3 . A profile stretching fixture, vertically fixing two vertical plates 1 on the bottom plate 13, the outer surfaces of the two vertical plates 1 are not limited but the inner surfaces are inclined and symmetrical, the angle between the inner surfaces of the two vertical plates 1 is inclined is α, and 13°≤α≤23°.

[0039] Two symmetrical wedge-shaped slide plates 2 are respectively matched and attached to the inner surfaces of the two vertical plates 1, so that the angle between the outer surfaces of the two wedge-shaped slide plates 2 is also α, and also satisfies 13°≤α≤23°. The inner surfaces of the two wedge-shaped slide plates 2 are parallel to each other.

[0040] The inner surface of each wedge-shaped sliding plate 2 and the clamping block 3 are connected together through a vertically arranged dovetail groove and a dovetail strip 31 matching structure.

[0041] The inner surfaces of the two clamping blocks 3 a...

Embodiment 2

[0044] Embodiment two: see figure 1 , image 3 , Figure 4 . The content is basically the same as that of Embodiment 1, and the similarities will not be repeated. The difference is that the lower part of the wedge-shaped slider 2 is directly in contact with the bottom plate 13 and is in friction fit. For the determination of the center of gravity of the unequal-edge profile, the method of adding a rigid backing plate 33 between the wedge-shaped slider 2 on one side and the vertical plate 1 is used to adjust the coincidence of the center of gravity of the unequal-edge angle steel and the center of the axis.

Embodiment 3

[0045] Embodiment three: see figure 1 , figure 2 , image 3 . A profile stretching jig, the jig is the same as the first embodiment, and will not be repeated, the difference is that the angle between the inner surfaces of the two vertical plates 1 is α, and 15°≤α≤20°. Therefore, the angle between the outer surfaces of the two wedge-shaped slide plates 2 is also α, and 15°≤α≤20°. The range of the friction 31 surface width L is 230 mm.

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Abstract

The invention discloses a profile stretching fixture and a horizontal profile stretching testing machine. The profile stretching fixture comprises a support, wedge-shaped sliding plates and clamping blocks; the inner surfaces of two upright plates form an included angle of alpha which ranges from 13 degrees to 23 degrees; the inner surface of each wedge-shaped sliding plate is connected with each clamping block through a vertically arranged dovetail groove and dovetail strip matching structure; the inner surface of each clamping block is provided with a friction surface with meshy friction lines; and the width L of the friction surface ranges from 190 mm to 240 mm. Different clamping blocks are designed according to the characteristics of different profile steel to be matched with the profile steel. The structural design can ensure that the clamping blocks provide enough pull force to the profile during the profile stretching and can keep the profile from sliding and being locally damaged to affect the test. The horizontal profile stretching testing machine has a simple structure, light weight and low manufacturing and testing cost, is convenient to operate, can greatly reduce the labor quantity during the detection test, can save energy, can move and is environmental friendly and safe.

Description

technical field [0001] The invention relates to the technical field of a mine-used integral profile detection equipment, in particular to a profile tensile fixture and a horizontal profile tensile testing machine. Background technique [0002] In the field of material tensile testing, the sample must be reliably clamped to prevent slipping, so that the technical parameters such as tensile strength, yield strength, elongation, residual stress, and elastic modulus of the material can be accurately obtained. Existing clamps have the following disadvantages: [0003] For the coal mine field, the mechanical performance requirements of profiles are high, and the existing testing machines are difficult to cope with. Due to their own design defects, the existing testing machines are basically unable to perform breaking tests and cannot complete the complete inspection of mining profiles. . Contents of the invention [0004] In view of the deficiencies in the prior art, the purpo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04G01N3/08G01N3/10
Inventor 傅泉臻
Owner HENAN COAL SCI RES INST
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