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为了建立高速多次线切割电极丝非线性流固耦合振动模型,首先通过定义一个平均摩擦系数,将多次切割切缝转换成等价的同心环柱流道,然后对电极丝在电介质流体中的受力情况进行分析,建立起多次切割电极丝的空间力学模型,同时推导出各个力的表达式。在此基础上,根据力平衡方程,建立了多次切割电极丝振动模型。最后采用四阶Runge-Kutta法分析了参数对电极丝动态特性的影响,为解决目前多次切割的加工精度稳定性较差问题,提供基础理论依据。
In order to establish a nonlinear solid-liquid coupled vibration model of high speed multi-wire electrode, a multi-cutting slit is first converted into an equivalent concentric annular channel by defining an average friction coefficient. Then, the electrode wire is immersed in a dielectric fluid Of the force analysis, the establishment of a number of cutting wire electrode space mechanical model, at the same time derive the expression of various forces. On this basis, according to the force balance equation, the multi-cut wire electrode vibration model was established. Finally, the fourth-order Runge-Kutta method is used to analyze the influence of the parameters on the dynamic characteristics of the electrode wire. The basic theoretical basis is provided to solve the problem of poor machining accuracy and stability of multiple cuts.