Drop hammer impact module and drop body type impact test device thereof

Abstract

The invention discloses a drop hammer impact module and a drop body type impact test device thereof. The drop body type impact test device comprises a cold and hot impact module which is used for enabling a sample to continuously move from a cold cabin and a hot cabin so as to achieve cold and hot impact, and a drop hammer impact module used for impacting the sample through a drop hammer until thesample is hit. The device is simple in structure, and can immediately carry out a drop body impact test after carrying out cold and hot impact on the sample, so that the strength of the sample more close to the actual environment can be reflected. According to the cold and hot impact module of the drop body type impact test device, the sample can be carried by a sample holder so as to be subjected to cold and hot impact, then the sample is rapidly conveyed to a position below the drop hammer to undergo drop hammer impact, the time consumed in the whole process can be shortened to be within 2seconds, and therefore heat exchange of the sample is little, and the test precision is relatively high. In addition, an impact frame is driven by an electromagnetic chuck to move towards the drop hammer, so that the problem that the service life of the sample frame is short due to the fact that electric equipment is directly installed on the sample frame is solved, and the impact frame can be quickly moved to reduce sample heat loss.

Description

technical field [0001] The invention relates to impact test equipment, in particular to a drop-type impact test device. Background technique [0002] The impact test is mainly used to detect the impact resistance of materials. At present, there are mainly thermal shock, free fall impact (such as the device recorded in the publication number CN109374446A), pendulum impact (such as the device recorded in the publication number CN209820974U), etc. The cold and hot shock method is mainly to place the sample in the cold warehouse and the hot warehouse to perform extreme cold and hot shocks alternately, so as to test the stability of the sample after being impacted by the extreme cold and hot environment. At present, it is mainly used for testing electronic products; free fall The impact is mainly to raise the drop hammer, place the sample under the drop hammer, and then release the drop hammer, so that the gravitational potential energy of the drop hammer directly impacts the sam...

AI Technical Summary

Problems solved by technology

Although this test method can partially reflect the strength of the material at extreme temperatures, it has the following defects: 1. Only a single temperature test can be performed, that is, only heating or cooling can be performed, and then the test can not be performed. Temperature shock test; 2. It takes at least 10 seconds to take out the sample and transfer it to the pendulum impact equipment. During this time period, the temperature of the sample has changed, so there is a large error; 3. The pendulum impact can only reflect the entire sample Anti-strike strength, but it cannot reflect the hardness of the material, single-point impact resistance, etc., and is not suitable for testing samples such as aerospace materials, bulletproof materials, and diving materials.

However, since the free-fall impact equipment completely uses the acceleration of gravity to obtain energy, it cannot simulate a high-intensity single-point impact. Therefore, at present, the pendulum impact equipment is mainly used for testing, so as to serve as a reference, and further actual testing of samples will be carried out later.

Obviously, this method cannot improve the efficiency of research, and once the later test fails, all previous tests and samples will be scrapped, which not only wastes a lot of manpower and material resources, but also wastes precious time

Images