基于圆弧走刀的尖角加工铣削力建模  

Modeling of Milling Force for Sharp Corner Machining with Arc Transition

作　　者：王保升[1] 郝洪艳[2] 潘超[3] 左健民[1] 

机构地区：[1]南京工程学院智能制造装备研究院,南京211167 [2]南京工程学院材料工程学院,南京211167 [3]上海工程技术大学轨道交通运营安全检测与评估服务协同创新中心,上海201620

出　　处：《组合机床与自动化加工技术》2017年第7期37-40,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金(51405210);江苏省高校自然科学研究重大项目(13KJA460002);南京工程学院科研基金(ZKJ201201)

摘　　要：为实现尖角加工过程中铣削力的精确预测,给出了工件轮廓与刀具路径的参数化统一表示方法,分析了两种情况下的铣削工艺过程,依据铣削特征化分为五个阶段,推导出每个铣削阶段的实际径向切深算式。基于实际径向切深,给出了切入/切出角的计算方法,建立了尖角加工的瞬时铣削力模型。利用直线铣削完成了切削力系数辨识,对尖角加工的瞬时铣削力进行预测,并进行试验验证,结果表明预测铣削力与实测铣削力具有良好的一致性,证实了铣削力模型的有效性和精确性,从而为工艺参数优化和颤振抑制提供了理论基础。To predict milling force accurately for sharp comer machining, a method is proposed to describe workpiece contour and tool path uniformly with parametric representation. According to sharp comer size, milling process is analyzed in two cases. Also, the milling process is divided into five stages considering milling characteristic. Then, calculating formulas of actual radial cutting depth for milling stages are de- duced. With the actual radial cutting depth, a method is presented to calculate the entry/exit angles. Thus, a model is presented to predict the instantaneous milling force for sharp comer machining. A straight line milling test is carried out to calibrate the cutting force coefficients. With the coefficients, instantaneous mill- ing force for sharp comer machining is predicted. Also, sharp comer milling test is carried out to verify the presented method. A good agreement between predicted results and experimental results is achieved, which shows that the presented model is efficient and accurate. The research can provide theoretical foundation for milling parameters optimization and chatter suppression.

关 键 词：尖角加工 铣削力建模 实际径向切深 

分 类 号：TH16[机械工程—机械制造及自动化] TG501[金属学及工艺—金属切削加工及机床]