Study on Instantaneous Tool Deflections Considering Tool Run-out in Micro Milling Process

doi:10.3901/JME.2019.05.241

Abstract

Abstract: According to the micro milling forces considering the influence of tool run-out (axial offset and tilt), a new mathematic method of tool deflections is proposed in the micro milling process. In the theoretical model of tool deflections in micro milling operations, the micro flat end mill is assumed as a continuous Timoshenko beam, and the distributed cutting forces acting on the discrete elements along the cutting edge direction have displaced the total cutting forces acting on the tool tip. Moreover, in order to obtain the values of tool deflections in micro milling operations, the measuring system including the capacitance sensors in the x-axis and y-axis directions is designed and set up. Then, the measured and predicted tool deflections can be compared and analyzed to validate the accuracy of the proposed theoretical model. The proposed model of tool deflections provides the theoretical foundation for further study on surface quality and parameters optimization of micro milling process.

Key words: micro milling, micro milling forces, tool deflections, tool run-out

CLC Number:

TG156

ZHANG Xuewei, YU Tianbiao, WANG Wanshan. Study on Instantaneous Tool Deflections Considering Tool Run-out in Micro Milling Process[J]. Journal of Mechanical Engineering, 2019, 55(5): 241-248.

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