Portable high-precision drop hammer impact testing machine

Abstract

The invention relates to a portable high-precision drop hammer impact testing machine comprising a falling weight impact assembly, a photoelectric speed measuring system, a guide rail-sliding block system, an anti-secondary impact device, a lifting releasing device and a support frame. The falling weight impact assembly is connected with the support frame by the guide rail-sliding block system; the photoelectric speed measuring system is connected with the falling weight impact assembly and the support frame; the anti-secondary impact device is fixed at the bottom of the support frame; and thelifting releasing device is arranged at the support frame. Compared with the prior art, the portable high-precision drop hammer impact testing machine has the following advantages: the overall structure is simple; the machine is convenient to assemble and move; the impact force, the impact speed and the rebound speed can be synchronously measured in real time; the drop hammer falls along the guide rail; the guiding precision is high; the impact point position is accurate; the testing machine is suitable for the low-speed impact tests of various large engineering structures; and the impact process can be studied and analyzed further by force, impact speed, and rebound speed collection.

Description

technical field [0001] The invention relates to an impact testing machine, in particular to a portable high-precision drop weight impact testing machine. Background technique [0002] During the manufacture and use of composite structures, they are very sensitive to out-of-plane loads, and are prone to various forms of damage such as fiber breakage, delamination, and matrix cracking under impact, which greatly reduces the load-carrying capacity of the structure. Similarly, during the application of composite structures in the field of aeronautical engineering, a large number of tests on the load-carrying properties of damaged structures are required, so it is necessary to carry out corresponding impact damage prefabrication tests. [0003] ASTM test standard D7136 / D7136M-05 stipulates a kind of test method for composite material drop hammer impact, puts forward specific requirements for measuring and calculating physical quantities such as impact force, impact energy and reb...

AI Technical Summary

Problems solved by technology

At present, the bench-top impact testing machine is usually used to test the specimen-level test pieces, but for large-scale engineering structures of composite materials, due to the large size and complicated actual working conditions, it is inconvenient to use the bench-top impact testing machine to test them at any position / different Required Impact Damage Preset Work

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