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首页> 外文期刊>Journal of Advanced Mechanical Design, Systems, and Manufacturing >Optimal Design of a Damped Arbor for Heavy-Duty Machining of Giant Parts
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Optimal Design of a Damped Arbor for Heavy-Duty Machining of Giant Parts

机译：大型零件重型加工减振刀杆的优化设计

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Aiming to suppress chatter vibration during machining of huge mechanical parts, dies, and molds, a design method for a damped arbor imbedded with a mass damper was devised. First, an analysis method coupled with Rayleigh's method was developed and used to calculate the stiffness of an arbor with a tapered hollow space for installing the mass damper inside. In the formulation of the vibrating system with two degrees of freedom, the displacement ratio is introduced for accurate calculation of the counter force of the damper mass. Then, the shape and size of the hollow space was optimized in order to maximize the negative real part of the compliance of the arbor. The proposed design method can increase the dynamic stiffness of the damped arbor with a hollow with the minimum reduction in its static stiffness. Furthermore, it is found that once the damper is optimized for the maximum length of an arbor in a certain design range, it can be applied to a shorter arbor without deterioration of dynamic stiffness. Finally, chatter noise and machined surface roughness measured experimentally proved that a damped arbor prototyped by the proposed design method has much higher cutting performance than a conventional one.
机译：为了抑制大型机械零件，模具和模具的加工过程中的颤振，设计了一种嵌入质量块阻尼器的阻尼心轴的设计方法。首先，开发了一种与瑞利方法相结合的分析方法，并用于计算带有锥形空心空间的心轴的刚度，以在内部安装质量阻尼器。在具有两个自由度的振动系统的设计中，引入了位移比以精确计算阻尼器质量的反作用力。然后，优化空心空间的形状和大小，以使心轴顺应性的负实部最大化。所提出的设计方法可以以最小的静态刚度减小来增加带有空心的阻尼心轴的动态刚度。此外，已经发现，一旦在特定设计范围内将阻尼器优化为最大的心轴长度，就可以将其应用于较短的心轴而不会降低动态刚度。最后，通过颤振噪声和机械加工的表面粗糙度进行了实验测量，结果表明，所提出的设计方法原型制作的阻尼心轴具有比传统方法更高的切削性能。

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