Abstract
The slender type tool usually can be used in milling the thin-walled components in a narrow and deep processing space, and the tool and the workpiece are usually deemed a system because the stiffness of both is closed. The milling stability is influenced by both the coupling deflection and dynamic characteristics of the tool-workpiece system. In order to investigate the time variation of the coupling deflection and dynamic characteristics of the tool-workpiece system, a new computational model was established in this paper. The workpiece was divided into several milling units, and the whole milling process was divided into a series of corresponding sub-milling processes. The coupling deflection of the tool-workpiece system in the sub-milling process was induced by milling force, and the milling force in the next sub-milling process was reversely induced by the coupling deflection of the tool-workpiece system, and by this analogy. Therefore, the thicknesses of units were different under the interaction between the milling forces and the coupling deflections. The changes of dynamic characteristics of the tool-workpiece system were induced by the changes of thicknesses of units. Based on the influences of the coupling deflection and the dynamic characteristics of the tool-workpiece system, a new stability lobe diagram which can show different stability zones and chatter zones in different process positions was obtained. Experimental testing has been conducted to validate the newly established model.
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Zhang, L., Ma, L. & Zhang, D. Dynamic milling stability of thin-walled component considering time variation of coupling deflection and dynamic characteristics of tool-workpiece system. Int J Adv Manuf Technol 94, 3005–3016 (2018). https://doi.org/10.1007/s00170-017-1124-1
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DOI: https://doi.org/10.1007/s00170-017-1124-1