基于3-SPS并联机构的超声振动切削结构的研究  

Study of Ultrasonic Vibration Cutting Structure Based on the 3-SPS Parallel Mechanism

作　　者：何宇[1] 邹平[1] 陈明方[1,2] 谷忠仁 吴昊[1] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819 [2]沈阳职业技术学院电气工程系,沈阳110045 [3]中航沈飞民用飞机有限责任公司,沈阳110034

出　　处：《组合机床与自动化加工技术》2014年第9期1-5,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：辽宁省自然科学基金资助项目(20102067);沈阳市科技局重点科技攻关项目(F11-008-2-00);沈阳市科技局工业科技攻关项目(F11-001-2-00)

摘　　要：针对硬脆性材料在加工过程中表面容易产生裂纹和凹坑等缺陷,应用超声振动切削原理,提出一种基于3-SPS机构的刀尖可做空间复杂轨迹振动的非共振型压电超声振动切削结构。首先叙述了结构的运动机理及刀尖的微观运动轨迹,设计出压电振子结构,建立工作头的三维模型,并对工作头机构进行了运动分析、仿真和动力学分析,最后进行结构优化以及应力校核并加工出样机,验证该结构的可行性并得到其刀尖能够产生空间复杂振动轨迹的结论。In view of the hard brittle material in the process of machining surface it’ s easy to generate the defects such as cracks and potholes. Applicating ultrasonic vibration cutting principle, the paper puts forward a kind of non-resonant ultrasonic vibration cutting structure based on 3-SPS Parallel Mechanism, in which the tool tip can act with complex vibration track in space. Firstly, introduction of movement mechanism of the structure and the the micro motion trajectory of the tip are depicted, followed by designing a piezoelectric vibrator structure and establishing the three-dimensional model of the 3-SPS vibration cutting structure. Sec-ondly, motion analysis, simulation and dynamics analysis have been took via theorical and FEM methord, Finally, through structure optimization and the stress checking, it has been verified for the feasibility of the structure and the ability of the blade capable of producing complex vibration trajectory.

关 键 词：脆硬性材料 3-SPS并联机构 振动切削 压电振子 

分 类 号：TH165[机械工程—机械制造及自动化] TG511[金属学及工艺—金属切削加工及机床]