摘要
为在线监测螺纹硬旋铣过程的刀具状态、研究其切削机理、实现硬旋铣工艺的高性能加工,提出一种用于旋铣工艺的压电式刀齿三向切削力在线测试系统。结合旋铣工艺运动特征对测试系统进行性能要求分析和结构设计,并运用有限元法分析测力仪结构设计的合理性,通过静态加载试验和锤击模态试验获得测力仪的主要性能参数,将测试系统用于旋铣工艺刀齿切削力的测量。为验证试验数据的有效性,建立基于剪切与犁切效应的双圆弧螺纹滚道旋铣切削力预报模型。试验数据与预测数据取得了很好的一致性。结果表明所研制测试系统完全适用于螺纹旋铣过程刀齿切削力的测量,将为深入研究硬旋铣工艺的加工机理提供重要技术手段。
An on-line piezoelectric measuring system for triaxial cutting force of individual tooth in whirling process is developed, in order to monitor cutter status, study cutting mechanism, and accomplishes high performance hard whirling. Performance requirement of measuring system is discussed, and the dynamometer construction based on whirling machine tool is expressed. Construction reasonableness of the dynamometer is identified by FEM. Main performance parameters of the dynamometer are brought out by static calibration of steady load test and dynamic identification of plus test. The dynamometer is tested in operating whirling conditions. A cutting force prediction model of thread whirling process with double-arc ball track normal cross-section, based on shearing and ploughing effect, is developed in order to validate the testing data, and there is a good agreement between experimental and predicted cutting force trends. It is found that the measuring system is well qualified to monitoring cutting force of individual tooth in thread whirling process, which offers an essential technical means for cutting mechanism study of hard whirling process.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2015年第11期207-212,共6页
Journal of Mechanical Engineering
基金
国家科技重大专项资助项目(2009ZX04001-171-02
SK201201A40-01)
关键词
切削力
旋风铣削
测力仪
预报模型
cutting force
whirling process
dynamometer
predictive model
