摘要
刀具作为切削加工的基础工具,如何提高它的性能是当前研究的热点。仿生学研究表明帽贝的牙齿具有优良的力学性能,这为刀具的优化设计提供了依据。运用仿生学原理,通过生物解剖的方法制备了帽贝的单颗牙齿,利用数据分析软件提取牙齿内外轮廓曲线,得出其拟合多项式,并以多项式曲线的曲率为基础,对牙齿轮廓特征进行了分析,最后依据该多项式设计出了仿生刀具模型。对刀具前角、进给量、切削速度设计了正交试验,通过有限元软件进行二维正交切削仿真,并运用极差分析法探讨这3个因素对切削力的影响。以切削力最小为设计目标,在试验参数范围内进给量为0.1 mm/r,前角为5°,切削速度为150 m/min是最优组合,同时与普通刀具仿真结果进行对比,发现仿生刀具有省力的优势。
As the basic cutting tool of cutting,how to improve the performance of cutting tools is a hot topic in current research.The bionics research shows that the limpets'teeth have excellent mechanical properties,which provides a basis for the optimization design of the cutting tool.The internal and external contour curves of teeth were extracted by data analysis software,and the fitting polynomial was obtained.Based on the curvature of the polynomial curve,the contour characteristics of teeth were analyzed.Finally,the bionic cutting tool model was designed according to the polynomial.Orthogonal experiment was designed for rake angle,feed rate and cutting speed.Two-dimensional orthogonal cutting simulation was carried out by finite element software,and the influence of these three factors on cutting force was discussed by range analysis method.Taking the minimum cutting force as the design goal,within the range of test parameters,the feed is 0.1 mm/r,the rake angle is 5°,and the cutting speed is 150 m/min is the optimal combination.At the same time,compared with the simulation results of ordinary cutting tools,it is found that the bionic cutting tool has the advantage of saving labor.
作者
马晶
杨绍成
刘强
张明鉴
MA Jing;YANG Shaocheng;LIU Qiang;ZHANG Mingjian(School of Mechanical and Power Engineering,Harbin University of Science and Technology,Harbin 150080,China)
出处
《哈尔滨理工大学学报》
CAS
北大核心
2023年第1期11-19,共9页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金(52005141)
2020年度黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2020193)。
关键词
帽贝牙齿
几何特征提取
切削力
切削过程仿真
limpet teeth
gaining of geometric characteristics
cutting force
cutting process simulation
