CAJ | 학술논문

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。
침대경취성재료재가공과정중표면용역산생렬문화요갱등결함，응용초성진동절삭원리，제출일충기우3-SPS궤구적도첨가주공간복잡궤적진동적비공진형압전초성진동절삭결구。수선서술료결구적운동궤리급도첨적미관운동궤적，설계출압전진자결구，건립공작두적삼유모형，병대공작두궤구진행료운동분석、방진화동역학분석，최후진행결구우화이급응력교핵병가공출양궤，험증해결구적가행성병득도기도첨능구산생공간복잡진동궤적적결론。
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.