磨料水射流切削皮质骨断面形貌特征研究  

Study on Surface Morphology of Cortical Bone Cut Section by Abrasive Water Jet

作　　者：杨焘 赵韡 祝锡晶[1,2] 陈俊伟 潘浩宇 YANG Tao;ZHAO Wei;ZHU Xijing;CHEN Junwei;PAN Haoyu(School of Mechanical Engineering,North University of China,Taiyuan 030051,China;Shanxi Key Laboratory of Advanced Manufacturing Technology,Taiyuan 030051,China;Shanxi Aerospace Qinghua Equipment Co.,Ltd,Changzhi 046000,China)

机构地区：[1]中北大学机械工程学院,山西太原030051 [2]山西省先进制造技术重点实验室,山西太原030051 [3]山西航天清华装备有限责任公司,山西长治046000

出　　处：《湖南大学学报（自然科学版）》2024年第4期64-70,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51905499);中国博士后科学基金资助项目(2019M661067);中北大学第十八届研究生科技项目(20221810)。

摘　　要：为探索磨料水射流切削过程中对皮质骨材料的切削机理,提高切削断面质量,分别以石榴石、氯化钠为磨料对皮质骨进行切削,对比不同切削方向下断面粗糙度变化规律以及微观划痕特征.实验结果表明,断面粗糙度数值均呈现先减小后增大的特点,依据表面粗糙度数值将断面分为初始区、光滑区、粗糙区3部分.当使用磨料为氯化钠,切削方向垂直于骨单元时,断面粗糙度平均值分别是切削方向平行和横向于骨单元时断面粗糙度平均值的1.74倍和1.70倍.当使用磨料为石榴石,切削方向垂直于骨单元时,断面粗糙度平均值分别是切削方向平行和横向于骨单元时断面粗糙度平均值的1.41倍和1.55倍.切削过程中断面形成大量微米级划痕,对比氯化钠、石榴石2种磨料对断面划痕特征的影响,与石榴石相比,当使用磨料为氯化钠时,皮质骨切削断面划痕尺寸偏大,长度、宽度值跨度相近,划痕深度值跨度较大.To explore the cutting mechanism of cortical bone material during abrasive water jet cutting and improve the quality of cutting surfaces in the abrasive jet cutting process,sodium chloride and garnet were used as abrasives to cut cortical bone.The changes in surface roughness under different cutting directions and the microscopic scratch characteristics were compared.The experimental findings demonstrate a characteristic pattern in which the roughness values of the cutting section initially decrease and then increase.Based on these roughness values,the section can be divided into three distinct regions:initial region,smooth region,and rough region.When using sodium chloride as the abrasive,the average roughness values of the cutting surface in the direction perpendicular to the bone unit are 1.74 times and 1.70 times those in the directions parallel and traverse to the bone unit,respectively.When using garnet as the abrasive,the average roughness values of the cutting surface in the direction perpendicular to the bone unit are 1.41 times and 1.55 times those in the directions parallel and traverse to the bone unit,respectively.Numerous micrometer-scale scratches are formed on the cutting surface during the cutting process.The impact of sodium chloride and garnet abrasives on the scratch characteristics of the cutting surface was compared.Compared with garnet,when using sodium chloride as the abrasive,the dimensions of the cortical bone cutting surface scratches are too large,with similar length and width values;the range of scratch depth values is greater.

关 键 词：水射流 磨料 皮质骨 表面粗糙度 微观形貌 

分 类 号：TG664[金属学及工艺—金属切削加工及机床] R318.08[医药卫生—生物医学工程]