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研制了一种新型磨损试验机,用于研究材料在冲击滑动耦合作用下的磨损特性。试验机由电磁激振器激励悬臂梁产生法向冲击,电机带动旋转轴产生切向滑动。各试验参数(冲击力幅值、冲击力频率及滑动速度)调节方便可靠,最大冲击力、冲击频率及滑动速度分别为100 Hz,200 N及4.52 m/s。本文使用该试验机对材料在冲击滑动耦合作用下的磨损特性进行了研究,并利用称重法、二维轮廓测量及电子扫描显微镜评估了材料磨损。结果表明:在相同试验条件下,试验的重现性较好,数据重复性误差小于7%。此外,硬度高的钛合金试件比硬度低的铝青铜试件磨损严重。
A new type of wear tester was developed to study the wear characteristics of materials under impact-slip coupling. The test machine excites the cantilever by the electromagnetic exciter to produce the normal impact, and the motor drives the rotating shaft to produce tangential sliding. The test parameters (impact amplitude, impact frequency and sliding speed) are easily and reliably adjusted. The maximum impact force, impact frequency and sliding speed are 100 Hz, 200 N and 4.52 m / s, respectively. In this paper, we use the testing machine to study the wear characteristics of the material under impact-slip coupling and evaluate the wear of the material by using the weighing method, two-dimensional profile measurement and scanning electron microscope. The results show that under the same experimental conditions, the reproducibility of the test is better and the data repeatability error is less than 7%. In addition, the high hardness of the titanium alloy specimen than the low hardness aluminum bronze specimen wear serious.