基于模态特征分析的铣削刀具寿命预测

Prediction Method of Milling Tool Life Based on Analysis of Modal Characterization

Ti-6Al-4V钛合金加工过程中易出现加工振动现象,加工振动会加剧刀具磨损,降低刀具寿命。在Taylor刀具寿命扩展模型的基础上,提出了考虑薄壁加工系统模态参数的铣削刀具寿命预测模型。首先,开展了模态测量试验和铣削加工刀具磨损试验,获取了系统的模态参数和刀具的磨损值;其次,利用模态参数和磨损值建立铣削刀具寿命预测模型,并对各参量对铣削加工刀具寿命的影响进行对比分析;最后,通过钛合金Ti-6Al-4V切削加工试验验证了该模型的预测精度和可靠性。结果表明,基于加工颤振特征分析的铣削刀具寿命预测方法能够准确地预测薄壁零件加工中的刀具寿命,为进一步提高刀具寿命和加工质量提供了理论指导和实践参考。

During the machining process of Ti-6Al-4V titanium alloy,the machining vibration is prone to occur,which can accelerate tool wear and reduce tool life.In this study,based on the Taylor tool life extension model,a milling tool life prediction model considering the modal parameters of the thin-walled machining system is proposed.First,modal measurement experiments and milling tool wear tests are conducted to obtain the system's modal parameters and tool wear values.Then,the milling tool life prediction model is established using the modal parameters and wear values,and the impact of various parameters on tool life in milling is compared and analyzed.Finally,The accuracy and reliability of the model were validated through cutting experiments using titanium alloy Ti-6Al-4V.The results show that the milling tool life prediction method based on the analysis of machining chatter characteristics can more accurately predict tool life in the machining of thin-walled components,providing theoretical guidance and practical references for further improving tool life and machining quality.