Simple pendulum type high-speed impact scratch test device

Abstract

The invention relates to the technical field of single-point impact wear test devices, and provides a simple pendulum type high-speed impact scratch test device which comprises a supporting frame, a simple pendulum unit, an energy supply unit and a hammer blocking unit are arranged on the supporting frame, and the simple pendulum unit makes contact with the energy supply unit to complete scratch; after the simple pendulum unit is in contact with the energy supply unit, the simple pendulum unit is in contact with the hammer stopping unit and is stopped by the hammer stopping unit from continuously swinging; in the process that the simple pendulum unit makes contact with the energy supply unit, scratching is achieved. After the simple pendulum unit makes contact with the energy supply unit, the simple pendulum unit makes contact with the hammer blocking unit and is prevented from continuously swinging by the hammer blocking unit, and secondary scratches are prevented from being generated on the surface, making contact with the simple pendulum unit, of the energy supply unit. Therefore, the simple pendulum type high-speed impact scratch test device for simulating single abrasive particle wear under the condition of high-speed impact is realized. In other words, a single abrasive particle is simulated to scratch the surface of a material at a high speed under a certain impact force to generate a scratch with a certain depth, and the wear performance of the material is analyzed through energy loss.

Description

technical field [0001] The invention relates to the technical field of a single-point impact wear test device, in particular to a single-pendulum high-speed impact scratch test device. Background technique [0002] Single pendulum impact scratching is a friction and wear test method of a single pendulum type high-speed impact scratching test device, which can better simulate the process of a single abrasive particle scratching the surface of the test piece under the impact force and producing scratches. The damage process of the surface material measures the wear resistance of the material by calculating information such as the energy consumed by the generation of scratches. [0003] The working mode of the single pendulum scratch testing machine in the prior art is that the swing arm freely falls through its own gravity to contact the static specimen, and the scratch speed is very low. According to the energy conversion relationship, it is found that increasing the arm leng...

AI Technical Summary

Problems solved by technology

[0003] The working mode of the single pendulum scratch testing machine in the prior art is that the swing arm freely falls through its own gravity to contact the static specimen, and the scratch speed is very low. According to the energy conversion relationship, it is found that increasing the arm length has a very low benefit to the speed increase (assuming The maximum scratching speed that can be obtained with an arm length of 1m is about 6m / s, and the maximum scratching speed that can be obtained with an arm length of 2m is about 8.5m / s)

In some cases, such as when the plane hits the runway at a very high speed (200km / h≈55m / s) at the moment of landing, the general single pendulum scratch test machine cannot simulate this single abrasive wear process

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