Wear Loss Measurement of Machine Based on Mechanical Mechanics and Computer Image Analysis

摘要

Wear loss is defined as volume, weight and length difference due to the wear process. In practice, measurement of wear loss is difficult because most parts of the machine have no simple shape and are not easy or even impossible to measure the changes of volume, weight or length. In this paper, a particular method of wear loss measurement based on computer image collection and analysis was developed to measure the length changes of some particular parts such as ball grooves of the muster clutch's release ring of a type of tracked vehicle. Macro-surface profiles of a worn surface of a groove on a release ring were taken by a digital camera first and were demarcated. Then worn scars of these digital photos were scaled in length by a computer image processing software of DT vision foundry. The geometrical relationship between wear length and depth was analyzed so that the wear depth was available as well. Results show that the length of the scar is 15.9 mm and the depth is 1.48 mm. Then the surface of the wear scar was measured by a type of 3D laser scanning machine and the points cloud was rearranged and edited by a reverse software of Surfacer. Results of 3D scanning show that the length of the scar is 15.7 mm and the depth is 1.56 mm, which is well consistent with the results of the method mentioned above. It demonstrates the effectiveness and economy of using the method of computer image collection and analysis for wear loss measurement.