Influences of Non-axial Process Loads on the Transducer and the Associated Mounting in Ultrasonic Machining
Influences of Non-axial Process Loads on the Transducer and the Associated Mounting in Ultrasonic Machining
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DOI：
10.1515/ehs-2014-0022
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发表时间：
2015-04
影响因子：
--
通讯作者：
P. Bruns;J. Twiefel
中科院分区：
文献类型：
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作者：
P. Bruns;J. Twiefel
提出了一种研究载荷对超声换能器振动影响的分析方法。这里的重点是超声辅助加工中使用的换能器，因为发生了高工艺负荷。这些载荷可以通过激发弯曲或扭转模式来影响操作振动。然而，对这一进程的明确影响尚未确定。因此，关于每种振动模式分别影响工作振动的结论是可取的。为了实现这一点，必须确定与负载相关的本征模态。但问题仍然是各自对运行振动的影响有多大。在手头的贡献中，这两个问题将通过基于模态转换的分析来回答，该分析由一个明确的例子说明。结果表明，定义的模态力允许分别确定激励模态和加载载荷耦合到特定模态的显式份额。此外，每个特征模态对产生的振动的定性影响可以通过模态方程特解的大小来评估。所开发的分析应用于工艺载荷和安装载荷。因此，根据受力方向和施加点的不同，研究了不同的载荷设置，得出了该分析方法通用、实用、可靠和高效的结论。
Abstract An analysis method allowing investigations of load influences on ultrasonic transducer oscillations is developed and presented. The focus here is on transducers utilized in ultrasonic-assisted machining due to the high process loads occurring. These loads can affect the operational vibration by exciting bending or torsion modes. However, the explicit impact on the process has yet to be determined. Hereby, conclusions about each oscillation mode effecting the operational vibration separately would be desirable. To achieve this, the eigenmodes being excited in dependence of the load have to be determined. Though the question remains of how big the respective influence on the operational vibration is. In the contribution at hand both questions will be answered by means of a modal transformation-based analysis that is illustrated by an explicit example. It is shown that a defined modal force permits determining the excited modes and the explicit share of the applied load coupling into the particular mode, respectively. In addition, the qualitative impact of each eigenmode on the resulting vibration can be evaluated by means of the magnitude of the modal equation’s particular solution. The developed analysis is applied on process and mounting loads. Therefore, different load setups are investigated in dependence of the force direction and the application point, thus leading to the conclusion that the presented analysis method is versatile usable, trustable and efficient.