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Elastic protection device on tension test machine

A technology of tensile testing machine and protection device, applied in the direction of measuring device, strength characteristics, instrument, etc., can solve the problems of mechanical sensor damage and force value increase, and achieve the effect of ensuring accuracy

Inactive Publication Date: 2016-08-24
YANTAI ZHENGHAI HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in fact, even under these multiple protection measures, damage to the mechanical sensor still occurs from time to time when the force exceeds the damage limit
One is that when testing materials with a relatively high modulus, the force value will rise sharply no matter it is stretched or compressed. It is often too late to take further measures, because the force value rises too fast, and the force value has exceeded the damage limit of the mechanical sensor during the execution of the protection mechanism
Secondly, during the compression test, even if the material with a low modulus is compressed to a certain extent, the force value will rise sharply, and it is easy to exceed the damage limit and cause damage to the mechanical sensor.
[0005] Therefore, the above protection measures are not foolproof, and the mechanical sensor on the tensile testing machine needs a more effective protection scheme

Method used

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  • Elastic protection device on tension test machine
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  • Elastic protection device on tension test machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 2 to Figure 3 As shown, the elastic protection device that acts as a compression protection can be installed on the force sensor, or it can be hidden in the table of the tensile testing machine. Such as Figure 8 , 9 As shown, the elastic protection device includes a shell and an elastic component. The elastic component is assembled in the shell. One end of the shell has an end cap that can be compressed inward but cannot be stretched outward. The compressive force that the elastic component receives in the shell , preferably equal to the range of the mechanical sensor. When the compression force is less than the range, the elastic part does not deform, and the test results are not affected. When the compression force exceeds the range, the elastic part undergoes compression deformation, avoiding the sharp rise of the compression force, and showing a gentle rise caused by the compression of the elastic part This trend wins valuable reaction time for t...

Embodiment 2

[0035] Such as Figure 5 As shown, the compression protection device and the tension protection device can be used in combination, assembled on the mechanical sensor or directly on the tensile testing machine, and can play a protective role after the tensile force or compression force exceeds the range, realizing a more comprehensive Protect.

Embodiment 3

[0037] Such as Figure 6 As shown, the compression protection device may not have a shell plus an elastic component, but an open structure. The elastic part is placed on the table, a baffle is arranged on the elastic part, a clamp is installed in the center of the baffle, and guide holes are arranged on the edge. Two or more uprights are installed on the table, and the plane movement of the baffle is restricted through the guide holes on the baffle, and the rebound limit of the elastic part is set on the top of the upright, and the elastic part is compressed to make the compression force reach the mechanical sensor range.

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Abstract

The invention relates to an elastic protection device on a tension test machine. The device comprises an elastic component and a limiting device limiting the length of the elastic component, wherein the elastic component is assembled together with the limiting device in a stressed state, either retraction or extension of the elastic component is limited, the length of the elastic component does not change under acting force in the limited direction or under acting force the value of which does not exceed a set value in the unlimited direction, and the length of the elastic component changes under acting force the value of which exceeds the set value in the unlimited direction. In this way, sharp increase of the force value is avoided, the force value increases gradually, response time is provided for equipment and operators so that various effective measures can be taken to protect a mechanical sensor, and damage to the mechanical sensor beyond breaking limit is avoided.

Description

technical field [0001] The invention relates to an elastic protection device on a tensile testing machine, in particular to an elastic protection device for avoiding damage to a mechanical sensor caused by a sharp rise in force value. Background technique [0002] Tensile testing machine is a common testing equipment, the typical structure is as follows figure 1 , including the bottom platform and the door-shaped frame, the moving beam installed on the frame is used as the moving end, the table top or the fixed beam at the top is used as the fixed end, the fixed end is directly connected to the fixture, and the moving end is connected to the fixture through a mechanical sensor. The two ends of the sample are fixed on two fixtures, the moving end moves at a certain speed, the sample is stretched or compressed, the force value on the mechanical sensor and the corresponding displacement of the moving end are recorded, and the force curve is given. [0003] The mechanical senso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02
CPCG01N3/02G01N2203/0017
Inventor 李海帆于书华仲崇华
Owner YANTAI ZHENGHAI HIGH TECH