关键词: 智能设计, 主轴, 结构, 刚强约束, 结构数学模型, 结构设计

Abstract:  Aiming at the problems that the spindle structure was mainly designed by people based on their experience, the design results had a great correlation with human experience and might not fully consider the thermal influences and other factors, so it was difficult to realize the intelligent design. By defining the geometrical structure functions of the spindle structures, establishing the strength constraints and stiffness constraints of the spindle structures, realizing the stiffness-strength coupling analysis of the spindle structures, and ultimately the expandable mathematical model was established for the design of the spindle structures. According to the established mathematical model of spindle structures, the spindle profile shape curve that meet the rigid-strong coupling requirements was obtained through numerical solving, and then, combined with the assembly requirements, the curve was transformed into a straight line profile that was easy to be processed by using the method of segmented straight line fitting, so as to obtain the straight line profile of each segment for the spindle, and to complete the design of the spindle structures based on the rigid-strong coupling. Finally, the spindle structure design of a vertical machining center was taken as an example to verify the correctness and feasibility of the proposed method, which provides an intelligent basis for spindle structure design.

Key words: intelligent design, spindle, structure, stiffness-strength constraint, structural mathematical model, structural design