实践证明,对于超声振动切削刀具,以往按初等理论进行的谐振设计往往存在以下缺陷: (1)刀杆固有频率计算值与精确值相差甚远,使刀杆与激振系统的共振没计归于失败; (2)谐振长度与振型不符,激振点偏离正确位置,振动强度达不到切削要求。考虑对初等理论的修正,对一般杆件横 Practice has proved that, for the ultrasonic vibration cutting tool, the resonant design based on the elementary theory in the past often has the following defects: (1) the calculated value of the natural frequency of the tool pole is far from the exact value, so that the resonance of the cutter bar and the excitation system Failure; (2) resonance length and vibration mode does not match, the excitation point deviate from the correct position, the vibration strength of less than cutting requirements. Consider the revision of elementary theory, horizontal bar on the general