凹槽微织构刀具皮质骨切削仿真研究

2020-03-11

作者：陈先念，胡亚辉，陈进，张春秋，郑清春单位：天津市先进机电系统设计与智能控制重点实验室；机电工程国家级实验教学示范中心（天津理工大学）

摘要：在骨钻削过程中，钻削力过大会对骨组织造成损伤，研究表明，微织构能够有效改善刀具的切削性能。将钻削简化为二维切削，研究凹槽微织构刀具对切削力的影响。基于切削理论建立了凹槽微织构刀具的切削力模型，利用ABAQUS软件进行皮质骨二维切削仿真。设计单因素试验确定微织构参数（宽度、间距和刃边距）对切削力的影响，对比分析微织构刀具和无微织构刀具的仿真结果。结果表明：微织构刀具能够有效减小切削力；微织构参数对切削力有不同影响。

关键词：微织构；皮质骨；切削仿真；切削力

中图分类号：TG52；TH161文献标志码：ADOI：10.3969/j.issn.1000-7008.2020.02.008

Simulation Study of Cortical Bone Cutting with Grooved Microtexture Tool

Chen Xiannian，Hu Yahui，Chen Jin，Zhang Chunqiu，Zheng Qingchun

Abstract:Excessive drilling force will cause damage to bone tissue in the process of bone drilling.The results show that the microtexture can effectively improve the cutting performance of cutting tools.Drilling is simplified to twodimensional cutting，and studing the influence of groove microtexture tool on cutting force is studied.Based on the cutting theory，the cutting force model of groove microtexture tool is established，and the twodimensional cutting simulation of cortical bone is carried out by ABAQUS.A single factor experiment is designed to determine the influence of microtexture parameters (width，spacing and distance with cutting edge) on cutting force.The simulation results of microtexture tool and nonmicrotexture tool are compared and analyzed.The results show that the microtexture tool can effectively reduce the cutting force，and the influence of the microtexture parameters on the cutting force is different.

Keywords:microtexture；cortical bone；cutting simulation；cutting force