Based on the remarkable effect of bionic surface texture to improve the tribological performance,how to reasonably distribute the groove texture with better lubrication and wear reduction performance on the journal surface of roller bit journal bearing is one of the problems to be solved.In this paper,the effects of nanosecond laser power,scanning times and scanning speed on the geometry size and machining accuracy of the ablated groove texture on the journal surface of drill sliding bearing are studied by means of nanosecond laser micromachining and non-contact three-dimensional optical characterization.The results show that the groove texture depth increases with the increase of laser scanning times,while the groove texture depth increases with the increase of laser scanning times the width of the groove remained unchanged and the width of the groove texture decreased with the increase of scanning speed.The optimal laser ablation parameters for the groove texture with a width of 478 μm and a depth of 30 μm are:power of 35W,3 times of surface scanning,and scanning speed of 100 mm/s.This study provides a nanosecond laser processing technology and characterization method for optimizing the groove texture on the surface of the roller bit bearing friction pair.It will promote the industrial application of the bionic surface texture nanosecond laser micromachining technology in the field of antifriction and antifriction of the bit sliding bearing.
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何霞,曾维菊,王国荣,钟林.钻头滑动轴承表面织构的激光加工工艺研究[J].激光与红外,2020,50(12):1443~1449 HE Xia, ZENG Wei-ju, WANG Guo-rong, ZHONG Lin. Study on laser processing technology of surface texture of drill sliding bearing[J]. LASER & INFRARED,2020,50(12):1443~1449