Abstract
Milling head box is an important supporting part of spiral drill collar machine. Its dynamic performance has a big effect to the machine tool working accuracy. The three-dimensional (3D) model of milling head box was built in this paper. With finite element analysis software, the dynamic performance of the box was analyzed. The first six natural frequencies, relevant vibrations and mode shapes of the box were obtained. The results indicate that the milling head box structure is reasonable. No resonance will be induced during the machining process. It also provides thoughts and reference for further dynamic performance researches with practical significance.
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