Tool-Posture Optimization and Stiffness Index Analysis for Multi-axis NC Machine Tools
Tool-Posture Optimization and Stiffness Index Analysis for Multi-axis NC Machine Tools
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发表时间：
2008
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通讯作者：
N. System
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作者：
N. System
基于小挠度叠加原理，建立了多轴联动机床的通用刚度模型，作为刀具姿态优化的物理约束，在被加工的复杂曲面上，采用通用刚度模型计算多轴机床的刚度指标，并对多轴机床的刚度指标进行优化，以多轴机床为研究对象，在有效工作空间内确定刀具位姿，详细讨论了基于通用刚度模型的多轴机床刀具位姿优化问题，分析了任务空间中力椭球的特性，提出了面向加工的多轴机床刚度指标，用于刀具姿态规划。
Based on the superposition principle of small deflections,general stiffness model for multi-axis series machine tool was established as physical constrains for tool posture optimization.On the sculptured surface to be machined,stiffness index of multi-axis machine tool was computed by general stiffness model.Then optimized stiffness index of multi-axis machine tool was used to determine tool posture in the available workspace.Tool posture optimization based on general stiffness model for multi-axis machine tool was discussed in detail,in which the characteristic of force ellipsoid in task space was analyzed and machining-oriented stiffness index for multi-axis machine tool was originally developed for tool-posture planning.