关键词: 数控机床|数控转台|多体动力学|啮合侧隙|传动精度|Monte Carlo仿真

Abstract: To improve the machining performance of Numerical Control (NC) machine tool, aiming at the NC rotary table of double worm and worm gear, the geometrical and physical influence factors on meshing backlash such as center distance error, mid-plane error, middle shaft angle error and load were analyzed.The mechanism virtual prototype model of double worm was established based on multi-body dynamics theory and contact impact theory, and the simulation analysis was given in ADAMS. To research the influence of above four factors on transmission accuracy under different changes range, the Monte Carlo method was used to analyze the mechanism reliability by assuming that four factors for normal distribution and mutual independent. Thus the main influence factor was confirmed, and the reference for optimization design of NC rotary table's mechanism transmission was provided.

Key words: numerical control machine tool|numerical control rotary table|multi-body dynamics|meshing backlash|transmission accuracy|Monte Carlo simulation