單自由度與多自由度系統模型於刀具顫震穩定圖之分析

Chatter Stability Lobe Diagram Analysis by SDOF and MDOF Systems

王栢村(Bor-Tsuen Wang) ； 梁秀瑋(Xiu-Wei Liang) ； 周嘉莉(Chia-Li Chou)

《應用聲學與振動學刊》 3卷2期 (2011/10) Pp. 55-65

https://doi.org/10.6282/JASV.2011.3.2.02

摘要

切削顫震為自激激振現象，連帶影響刀具壽命與生產率等，透過刀具顫震穩定圖選擇加工參數，以期降低切削顫震發生。本文主要對單自由度與多自由度振動系統於銑削之刀具顫震穩定圖理論分析作探討，首先以單自由度振動系統之理論分析作為切削顫震分析之基礎，假設刀具為單自由度振動系統，並發展銑削顫震理論分析，依據顫震系統歸納求取刀具顫震穩定圖之分析步驟，最後為多自由度系統之銑削顫震預測分析步驟。期望透過單自由度與多自由度系統之理論分析與刀具穩定顫震圖之關聯性探討及其應用，並作為加工參數選用之參考。

關鍵字

切削顫震 ； 刀具顫震穩定圖 ； 單自由度系統 ； 多自由度系統

並列摘要

The chatter in metal cutting is a kind of self-excited phenomenon and affects the tool life as well as the metal removal rate. The stability lobe diagram (SLD) can help to select machining parameters so as to avoid chatter vibration. This work develops the single degree of freedom (SDOF) and multiple degree of freedom (MDOF) system models to predict the SLD for milling. First, the SDOF vibration system analysis is reviewed for chatter analysis. The milling cutting tools is assumed as the SDOF model to discuss the chatter phenomenon. The procedure to obtain the SLD is then presented step by step and applied to develop the SLD prediction program. Finally, the SDOF model for predicting the SLD is extended to the MDOF model that can be used to predict the SLD for practical milling tests. This work lays out the principle in analyzing the SLD and discusses it's applications to properly select machining parameters for avoiding chatter phenomenon.

並列關鍵字

Chatter ； Stability Lobe Diagram ； SDOF System ； MDOF System