Engineering Research Equipment: Control of Fixture- Workpiece Dynamics

工程研究设备：夹具-工件动力学控制

• 批准号: 9311271
• 负责人: Edward De Meter
• 金额: $ 2.81万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-15 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9311271&HistoricalAwards=false
• 关键词: Engineering; Research; Equipment; Control; Fixture

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

9311271德米特设备赠款用于制造最好的夹具，购买用于夹具的两个可编程MABLE动力装置，并用于关联用于夹具控制和监测的计算机硬件和软件。该设备和软件将用于分析和控制夹具-工件动态的技术开发。初步建模的结果表明，夹具-工件动态可能是加工误差的一个来源，几乎比机器的重复性大一个数量级。本文将重点研究小面积接触约束下的磨削加工过程中的动力学问题。它将：(1)开发模型以预测元件接触面几何形状、夹具元件放置和夹具驱动对加工精度的影响，(2)开发具有优异抗滑移性能的接触面几何形状，(3)开发用于确定元件放置和夹具驱动强度的模型以最大化加工精度，以及(4)研究可变夹具驱动作为一种减少工件位移的方法。为了评估模型和设计概念，将在整个研究过程中进行实验。研究过程可以扩展到几乎所有夹具的应用和加工精度的测量。它将对持功科学、工艺规划科学和机械加工经济学产生影响。此外，它还将确定工作保持和过程规划方面的其他研究问题