摘要
以侧铣可加工微晶陶瓷为对象,建立了瞬时整体铣削力模型,研究了刀具偏心跳动状态下立铣刀侧刃铣削瞬时铣削力。通过铣削刀具与工件的次摆线运动,获得了其瞬时切削厚度、瞬时切削面积。通过线性搜索法确定了刀具偏心量和偏心角的最优解,利用一维搜索算法进行了瞬时铣削力作用点的精确求解,并以刀具偏心跳动状态下的瞬时转角予以表达。以Martellotti模型为基础,建立了新的瞬时铣削力模型。以最小二乘法进行了瞬时铣削力模型系数辨识。并从铣削力作用点(瞬时转角)视角,研究了瞬时铣削力的变化特性。铣削实验验证结果表明,铣削力模型预测值与实验值吻合程度较高,平均相对误差不超过8%,该瞬时铣削力模型具有较高的预测精度。
Taking side milling machinable microcrystalline ceramics as object,an instantaneous overall milling force model was built.The instantaneous milling force of end milling cutter side edge milling was studied under the condition of tool eccentricity and runout.The instantaneous cutting thickness and area were obtained through the hypocycloidal motion between the milling tool and the workpiece.The optimal solution for tool eccentricity and eccentricity angle was determined through linear search method.The precise solution of the instantaneous milling force action point was ob⁃tained using a one-dimensional search algorithm and expressed as the instantaneous rotation angle under the condi⁃tion of tool eccentricity and jumping.A new instantaneous milling force model was established based on the Martellotti model.The instantaneous milling force model coefficients were identified using the least squares method.And from the perspective of the milling force action point(instantaneous rotation angle),the variation characteristics of instanta⁃neous milling force were studied.The validation results of milling experiments indicate that the predicted values of the milling force model are in good agreement with the experimental values,with an average relative error not exceeding 8%.Therefore,the instantaneous milling force model demonstrates high prediction accuracy.
作者
马廉洁
杜文豪
赵镇
邱喆
MA Lianjie;DU Wenhao;ZHAO Zhen;QIU Zhe(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China;School of Control Engineering,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2024年第4期270-279,共10页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(51975113,52305453)。
关键词
刀具偏心跳动
瞬时铣削力模型
瞬时切削面积
铣削力作用点
硬脆材料
tool eccentricity and runout
instantaneous milling force model
instantaneous cutting area
action point of milling force
hard and brittle materials
