通用刀具掃描體隱式曲面建模方法
[Abstract]:A general tool scanning volume modeling method based on implicit surface theory in five-axis machining simulation is proposed. In order to improve the time performance of Boolean subtraction the implicit surface can efficiently judge the position relationship between the scanning volume and the set of field points of the voxel data of the workpiece and avoid the time-consuming spatial intersection calculation. The implicit surface model of general cutter is defined. According to the theory of rigid body motion frame, the mapping relationship between workpiece frame and tool frame is established. The boundary range of curved surface is determined by reverse motion method, and the specific linear displacement and rotation angle of cutter are interpolated linearly. The implicit function surface equation of tool scanning volume in workpiece frame is derived. On the basis of analyzing the real root of scanning volume equation of various parts of the tool, an algorithm for constructing scanning volume based on implicit surface is presented. Taking typical cutting tools and motion types as examples, the process of scanning volume construction is analyzed. The experimental results show that the method is correct and has better time performance. The method is applied to the simulation of material removal in numerical control system.
【作者單位】: 中國科學(xué)院大學(xué);中國科學(xué)院沈陽計算技術(shù)研究所;大連工業(yè)大學(xué)信息科學(xué)與工程學(xué)院;
【基金】:國家科技重大專項資助項目(2012ZX01029001-002)
【分類號】:TG659
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