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Device and method for testing normal-temperature and high-temperature compression stress relaxation of rubber

A technology of high temperature compression and stress relaxation, which is applied in the direction of applying stable tension/pressure to test the strength of materials, so as to improve work efficiency, avoid errors, and avoid uneven stress distribution.

Inactive Publication Date: 2014-06-18
BEIHANG UNIV
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Problems solved by technology

[0005] In order to solve the problems existing in the rubber room temperature and high temperature compression stress relaxation test in the prior art, the present invention provides a device and method for rubber room temperature and high temperature compression stress relaxation test

Method used

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  • Device and method for testing normal-temperature and high-temperature compression stress relaxation of rubber
  • Device and method for testing normal-temperature and high-temperature compression stress relaxation of rubber
  • Device and method for testing normal-temperature and high-temperature compression stress relaxation of rubber

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Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] A kind of equipment that is used for rubber room temperature and high temperature compressive stress relaxation test with pressure sensor provided by the present invention, such as figure 1 As shown, it mainly includes the following parts: lower plate 1, limiter 2, upper plate 3, pressure sensor 4, sensor lead wire 5, pressure head 6 and flange 7.

[0036] Such as figure 1 As shown, the upper plate 3 is placed flatly above the lower plate 1, and the lower plate 1 and the upper plate 3 are fixed together by two limiters 2 on the left and right. The pressure sensor 4 is located between the lower plate 1 and the upper plate 3 , one end of the pressure sensor 4 is fixed on the center of the lower side of the upper plate 3 , and the other end is fixed with a pressure head 6 . The pressure sensor 4 is connected with an external data display instrum...

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Abstract

The invention provides a device and a method for testing normal-temperature and high-temperature compression stress relaxation of rubber. The device mainly comprises an upper plate, a lower plate, a limiter, a pressure sensor, a pressure head and a flange. The upper plate is fixed to the lower plate through the limiter. The pressure sensor is fixed at a center position of the upper plate and is located between the upper plate and the lower plate. The pressure head is fixed at another end of the pressure sensor. A rubber sample is fixed at a center position of the lower plate by the flange and contacts with the pressure head. The method comprises the following steps of preparing an appropriate rubber sample, assembling the device, fixing exactly the appropriate rubber sample at the center of the lower plate, contacting the appropriate rubber sample with the pressure head, removing the flange, putting the device into an aging test box for an experiment, and after the experiment is finished, determining compression stress relaxation coefficients of the appropriate rubber sample. Through the device and the method, normal-temperature and high-temperature compression stress relaxation tests are realized; real-time monitoring of compression stress variation is realized; and the accuracy, the repeatability and the reproducibility of a life prediction result are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of rubber material testing, and in particular relates to equipment and a method for testing rubber normal and high temperature compression stress relaxation. Background technique [0002] In the prior art, compression set and compression stress relaxation are usually used as characteristic indicators to predict the life of rubber materials. The existing technology measures the change of the compressive stress of rubber under normal temperature and high temperature constant deformation, that is, the rubber sample is compressed to produce a constant deformation, and the compressive stress relaxation of the sample is measured after aging at a certain temperature for different times, which provides a basis for the life evaluation of rubber materials. technical foundation. The compression stress relaxation test equipment recorded in the national standard GB1685-82 of the People's Republic of China for the determ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/18
Inventor 丁美丽张卫方赵丽杨明远刘升旺唐庆云
Owner BEIHANG UNIV
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