Engineering Research Equipment: Control of Fixture- Workpiece Dynamics

小行星9311271 设备补助金用于制造最佳夹具，购买两个用于夹具的可编程电源单元，以及用于夹具控制和监测的协会计算机硬件和软件。 该设备和软件将用于技术开发，以分析和控制夹具工件动力学。 初步建模的结果表明，夹具工件动力学可能是一个源的加工误差几乎大于机器的可重复性的幅度。 本文主要研究受小面积接触约束的铣削加工动力学问题。 它将：（1）开发模型以预测元件接触表面几何形状、固定元件放置和夹具致动对加工精度的影响，（2）开发具有上级抗滑移性的接触表面几何形状，（3）开发用于确定元件放置和夹具致动强度的模型，这将使加工精度最大化，（4）研究可变夹紧驱动作为减少工件位移的一种手段。 实验将在整个研究过程中进行，以评估模型和设计概念。 研究过程可以扩展到几乎所有的夹具应用和加工精度的措施。 它将对工件夹持科学、工艺规划科学和机械加工的经济性产生影响。 此外，它将确定在工作保持和过程规划的其他研究问题

9311271 DeMeter The equipment grant is for the manufacture of a best fixture purchase of two program mable power units for clamps and for association computer hardware and software for fixture control and monitoring. The equipment and software will be used in the development of techniques to analyze and control fixture-workpiece dynamics. Results from preliminary modeling indicated that fixture-workpiece dynamics could be a source of machining error nearly a magnitude greater than machine repeatability. This research will focus on the dynamics of workpiece restrained by small area contact and subject to milling. It will: (1) develop models to predict the impact of element contact surface geometry, fixture element placement, and clamp actuation on machining accuracy, (2) develop contact surfaces geometries which have superior resistance to slippage, (3 develop models for determining element placement and clamp actuation intensities which will maximize machining accuracy, and (4) investigate variable clamp actuation as a means of reducing workpiece displacement. Experimentation will be conducted throughout this research in order to evaluate models and design concepts. The research process can be extended to nearly all fixture applications and measures of machining accuracy. It will have an impact on work-holding science, process planning science, and the economics of machining. In addition, it will identify other research issues in work-holding and process planning