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標題: 以加工數據精進切削穩定圖之探討
A Study on Improving Cutting Stability Lobe Based on Machining Data
作者: 林鉉曜
Xun-Yao Lin
關鍵字: 切削穩定圖;顫振;系統參數;stability lobe diagram;chatter
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Cutting is one of the most fundamental machining processes and has been widely applied in industrial practice. While cutting is often bothered by chattering that generates vibration between the cutting tool and the workpiece thus downgrades the process quality and even damage the machine tools, it has been an issue how to overcome the chattering problem. Chattering is represented by the cutting stability lobe which indicates the limit of depth of cut for stable cutting at each spindle speed or cutting speed. Although various methods have been proposed to avoid the chattering in the cutting process, most of them are unable to predict the chattering precisely. In this study, cutting system parameters and stability lobe are improved based on machining data with system parameters obtained by modal testing as a reference. The machining data are the critical depth of cut at different cutting speeds. Cutting system parameters at different speed are calculated by least error square fit. Stability lobe is then adjusted based on the new system parameters. Two tests, a milling test and a turning test, are performed based on the proposed method for verification. The improved stability lobe is a good guide for engineers to avoid chattering
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