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首页> 外文会议>European seminar on precision optics manufacturing >Actuator design for vibration assisted machining of high performance materials with ultrasonically modulated cutting speed
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Actuator design for vibration assisted machining of high performance materials with ultrasonically modulated cutting speed

机译：执行器设计，用于以超声调制的切削速度进行振动辅助加工高性能材料

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In vibration assisted machining, an additional high-frequency oscillation is superimposed on the kinematics of the conventional machining process. This generates oscillations on the cutting edge in the range of a few micrometers, thereby causing a high-frequency change in the cutting speed or the feed. Consequently, a reduction of cutting forces, an increase of the tool life as well as an improvement of the workpiece quality can be achieved. In milling and grinding it has been shown that these effects are already partially present in the case of a vibration excitation in axial direction relative to the workpiece, which is perpendicular to the cutting direction. Further improvements of the process results can be achieved by superimposing a vibration in cutting direction and thus modifying the cutting speed at high frequency. The presented work shows the design of an ultrasonic actuator that enables vibration-assisted milling and grinding with ultrasonically modulated cutting speed. The actuator system superimposes a longitudinal torsional ultrasonic oscillation to the milling or grinding tool. It uses a bolt clamped Langevin transducer and a helically slotted horn, which degenerates the longitudinal vibration into a combined longitudinal torsional (L-T) vibration at the output surface. A finite element analysis is used to determine the vibration resonance frequency and mode shapes to maximize the torsional output. Afterwards, the simulation has been experimentally validated.
机译：在振动辅助加工中，附加的高频振荡会叠加在常规加工过程的运动学上。这会在几微米范围内的切削刃上产生振荡，从而导致切削速度或进给发生高频变化。因此，可以实现切削力的减小，工具寿命的增加以及工件质量的改善。在铣削和磨削中，已经表明，在相对于工件的轴向方向（垂直于切削方向）的振动激励下，这些影响已经部分存在。通过叠加切割方向上的振动，从而提高高频下的切割速度，可以实现过程结果的进一步改善。所展示的工作展示了一种超声波致动器的设计，该超声波致动器能够以超声调制的切削速度进行振动辅助的铣削和磨削。致动器系统将纵向扭转超声振荡叠加到铣削或磨削工具上。它使用螺栓夹紧的Langevin换能器和一个螺旋槽形的号角，该号角将纵向振动退化为输出表面的组合纵向扭转（L-T）振动。使用有限元分析来确定振动共振频率和振型，以使扭转输出最大化。之后，该仿真已通过实验验证。

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