五面体加工中心立卧转换摆角头结构设计及建模仿真

针对五面体加工中心在立卧转换时传动链过长不利于提高加工精度的问题,提出了一种五面体加工中心立卧转换摆角头的新方案.该方案摒弃了摆角头传输切削动力和立卧转换各自使用独立的一套动力源单独传动的方案,采用一套动力源既可以实现切削动力传输也可以实现立卧转换的设计方案,极大地缩短了传动链,在SolidWorks中建立了其三维机械结构模型.基于Romax对摆角头的传动系统进行了建模,在不同工况下对传动系统的可靠性进行了分析.结果表明:在给定工况下传动系统设计合理,运行可靠性满足设计要求.为了保证立卧转换摆角头主轴的刚度和稳定性,采用ABAQUS对其进行了模态分析.结果表明:在额定的工作转速范围内主轴不会发生共振.

Structural design and modeling simulation of standing-to-lying changing angle swing head of five-faced body machining center

Aimed at the problem of five-face body machining center that the transmission chain was excessive long and unfavorable for improving the machining accuracy in the case of standing-to-lying change, a novel project of angle swing head for standing-to-lying change was proposed. In this project, the measure of transmission was dropped, where the angle swing head employed individual set of power supply for cutting power transmission and also for standing-to-lying change, and a simple set of power supply was used either for cutting power transmission or for standing-to-lying change, so that the transmission chain was contracted extremely. A three-dimensional mechanical structure model of the assembly of angle swing head, spindle and its key components was established with software SolidWorks. The software Romax was used to conduct the modelling of the driven system of the angle swing head, and the reliability of the driven system was analyzed under different working conditions. The result showed that under given operation conditions the design of the drive system would be reasonable and the operational reliability would meet the design requirements. To ensure rigidity and stability of the standing-to-lying change spindle of angle swing head, the modality analysis was carried out by using the ABAQUS. The result showed that the spindle would not resonate within the range of rated operating speed.