Research on Cylindrical Turning Process Stability Judgment Based on Dynamic Cutting Process

doi:10.3901/JME.2019.03.208

Abstract

Abstract: A turning chatter model regarding inclination angle in axial and radial direction of workpiece, and modal direction of machining system is established. Based on the cutting force coefficients and modal parameters obtained from the cutting tests, the chatter stability lobe of given machine tool, tool and workpiece are obtained. The dynamic process models of cylindrical turning shaft are established, including the dynamic displacement between tool and workpiece and dynamic cutting force model. A method with the help of a X-Y mapping section of dynamic cutting force and that of dynamic displacement with the adjacent two spindle revolutions, in combination with time domain simulation signal of dynamic cutting force and dynamic displacement to comprehensively judge cutting process stability is put forward. The accuracy of chatter stability lobe and dynamic cutting process criterion are verified by cutting tests. The effectiveness, advantages and disadvantages of the two stability criteria are compared with the simulation results of the chatter stability lobe and the dynamic cutting simulation. The simulation results show that the dynamic cutting simulation method had the advantage of the simulation of the cutting process. In addition, the influence of the modal parameters on the stability of the cutting process is simulated by the variable parameters simulation of dynamic cutting process.

Key words: X-Y plane, dynamic displacement, dynamic turning forces, stability judgment, turning chatter

CLC Number:

TH161

QIU Jian. Research on Cylindrical Turning Process Stability Judgment Based on Dynamic Cutting Process[J]. Journal of Mechanical Engineering, 2019, 55(3): 208-218.

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