环形铣刀偏心车铣加工过程的切触区域建模  

Modeling of Cutter Workpiece Engagement in Eccentric Turn-milling Process with Bull-nose End Cutter

作　　者：周续 宛春博 张从鹏 Zhou Xu;Wan Chunbo;Zhang Congpeng(School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China;不详)

机构地区：[1]北方工业大学机械与材料工程学院,北京市100144 [2]北京动力机械研究所

出　　处：《工具技术》2022年第11期93-97,共5页Tool Engineering

基　　金：国家科技重大专项(2015ZX04002201);航空发动机高性能制造工业和信息化部重点实验室开放课题(HPM-2020-05);北方工业大学科研启动基金(110051360002)。

摘　　要：对刀—工切触区域准确建模是进行铣削力预测和优化的基础。针对环形铣刀偏心车铣加工过程,提出一种基于半离散实体造型的切触区域建模方法,通过分析偏心车铣加工刀位轨迹,明确偏心距离与前倾角度的对应关系。建立计算切触区域边界曲线的切片—交线方法,同时利用曲面修剪工具获取不同工况参数下的切触区域几何模型,分析了前倾角度和刀具圆角半径对切触区域的影响。结果表明:前倾角度增大时切触区域会在周向收缩而在轴向扩展,刀具圆角半径增大时切触区域在周向和轴向逐渐扩展。最后通过仿真和切削试验验证了所述方法的有效性。Accurate modeling of the cutter workpiece engagement is the basis for prediction and optimization of milling forces.Aiming at the eccentric turn-milling process with bull-nose end cutter, a cutter-workpiece engagement extracting method based on semi-discrete solid modeling is proposed.The toolpath for eccentric turn-milling process is analyzed.The corresponding relation between the eccentric distance and the leading angle is clarified.A slice-intersection-based method for calculating the engagement boundary curve is established, the surface trimming tool can be used to extract the engagement geometry under different milling conditions.The influences of the leading angle and the cutter corner radius are analyzed.The results show that the engagement shrinks circumferentially and expand axially as the leading angle increases, and expands slightly as the cutter corner radius increases.Several simulations and cutting tests are carried out to validate the effectiveness of the presented method.

关 键 词：环形铣刀 偏心车铣加工 刀—工切触区域 

分 类 号：TG501.1[金属学及工艺—金属切削加工及机床] TH164[机械工程—机械制造及自动化]