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A synthetic criterion for early recognition of cutting chatter

Science China(Technological Sciences) 2013年第11期56卷 2870-2876页

作者： JIA GuangFei WU Bo HU YouMin XIE FengYun LIU Ao State Key Laboratory of Digital Manufacturing Equipment & Technology Huazhong University of Science and Technology School of Mechanical Engineering Hebei University of Science and Technology

cutting chatter is a violent self-excited vibration between a tool and a *** negative effects mainly include poor surface quality,inferior dimensional accuracy,disproportionate tool wear or tool breakage,and excessive ***,early recognition and online suppression of chatter vibration are *** paper proposes a novel synthetic criterion(SC)for early chatter *** proposed SC integrates standard deviation(STD)and one-step autocorrelation function(OSAF).Moreover,this paper revised the fast algorithm of *** can quantitatively divide a chatter vibration signal into three stages,which are stable stage,transition stage and chatter stage according to the *** with STD,the SC can improve the reliability of chatter recognition and the threshold of SC is not sensitive to variable cutting *** paper presents an original algorithm of SC and its fast algorithm in *** fast algorithm of SC in this paper improves the computation efficiency compared with the original algorithm of *** validate the effectiveness of the proposed SC,a series of milling experiments were conducted under different cutting *** these experiments,the vibration signals were acquired by two accelerometers mounted on the spindle *** experimental results showed that the proposed SC could effectively recognize chatter vibration at an early stage of chatter vibration,which saved valuable time for online chatter suppression.

关键词： cutting chatter chatter recognition feature extraction synthetic criterion

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Design of High Precision CNC Vertical Lathe Turning Tool Holder

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Mechanical Engineering Science 2023年第1期5卷 22-26,I0005页

作者： Wenwu ZHANG Guangchen XU Lin QIAN Mantong WANG Jiayu LI Yingkou Institute of Technology YingkouLiaoning115000China 不详

A large aspect ratio vibration reducing tool holder based on passive damping vibration reduction technology is designed to solve the vibration problem that occurs in deep hole machining of vertical lathes.A dynamic model of passive damping vibration reduction tool holder was established,and the optimal damping ratio,optimal frequency ratio,and maximum relative amplitude were *** analysis of the passive damping vibrationreduction tool holder was conducted using *** results showed that the maximum response amplitude of the passive damping vibration reduction tool holder decreased significantly compared to the original one.

关键词： CNC vertical lathe cutting chatter cutting tool holder

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