振动条件下铣刀切削过程物质的传递转换关系是揭示其加工表面形成过程多时变性的关键。依据立铣刀、刀齿、工件之间物质能量的输入输出关系与立铣刀动态切削行为特性，构建铣刀切削过程的物质流结构，揭示各组元间的传递转换关系；利用铣刀、工件等不同物质载体的结构、运动及切削力等参数，定量表征物质流结构各节点的瞬时切削状态；构建物质流结构相邻节点的邻接矩阵，阐明相邻节点之间的传递关系；采用均方根值、峭度、主频与分形维数，揭示铣刀切削过程中物质信息流内部节点的动态特性。对物质信息流输入端、切削层节点及输出端进行实验验证。结果表明，该方法可揭示机床驱动下铣刀切削过程物质的传递与转换过程，为铣削工艺设计提供基础模型。
Abstract
The transfer and transformation of materials during milling under vibration is the key to revealing multi temporal of surface formation. Based on dynamic cutting behavior of milling cutter, the material flow structure was constructed, and transfer and transformation relationships between each component were revealed. Quantitatively characterize instantaneous cutting state of each node in the flow structure with parameters such as the structure, cutting motion, and cutting force. The adjacency matrix of adjacent nodes in the flow structure was constructed, and transfer relationship between adjacent nodes was clarified. Using root mean square, kurtosis, dominant frequency and fractal dimension, dynamic of internal nodes in material information flow were revealed. The input end, cutting layer node, and output end of material information flow were experimentally verified. The results showed that above method could reveal material transfer and transformation of milling process under machine tool drive, providing a basic model for milling process design.
关键词
铣削振动 /
铣刀 /
物质流 /
物质信息流 /
流结构
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Key words
milling vibration /
milling cutter /
material flow /
material information flow /
flow structure
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