A sample automatic centering device used in drop weight tear test

Abstract

The invention relates to an automatic sample centering device for a drop-weight tear test. The device comprises a testing machine body (A), wherein a sample support (4) and anvil beds (3 and 3') are installed on the testing machine body, and the anvil beds are installed on two sides of the sample support symmetrically; a magnetic backup plate (1) and a centering plate (5) are installed on inner sides of the two anvil beds respectively, and bottoms of the magnetic backup plate and the centering plate are located on the sample support; a through hole (11) is formed in the anvil bed close to the centering plate; one end of the centering plate is fixedly connected with a horizontal push-and-pull shaft (7) which penetrates through the through hole; the other end of the push-and-pull shaft is fixedly connected with a centering cylinder (8) fixedly mounted on the outer side of the anvil bed. According to the automatic sample centering device, no human is involved in the test, and the drop-weight tear test can be finished in 10 s, so that the accuracy of a test result is guaranteed. According to the automatic sample centering device, the magnetic backup plate is arranged, and a sample is driven by the centering cylinder to be adsorbed by the magnetic backup plate, so that the sample is not toppled in the test, and the test can be finished successfully.

Description

technical field [0001] The invention relates to a sample automatic centering device, in particular, after a sample with a thickness of 3 to 40 mm is placed on a sample support of a high-energy impact testing machine during a drop weight tear test, the sample is centered. A device for performing alignment. Background technique [0002] The drop weight tear test is a test item used to characterize the toughness and brittleness of materials, and is mainly used for the study of low temperature brittleness of metal materials. GB / T8363-2007 "Ferritic Steel Drop Weight Tear Test Method" stipulates that the sample is taken out from the heat preservation device and placed on the sample support of the testing machine and interrupted quickly. This process should be completed within 10 seconds. At present, the completion of the test is mostly realized by semi-manual and semi-automatic methods. The operator takes out the sample and puts it on the conveyor, and then the conveyor sends it...

AI Technical Summary

Problems solved by technology

Due to artificial factors, it is difficult to ensure that the entire test process is completed within 10 seconds. Even if the test is completed within 10 seconds, it is difficult to judge, which will have a certain impact on the test results.

In addition, the existing automatic sample feeding device cannot solve the problems of sample centering and easy pouring of samples during the breaking process, which often leads to test failures

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