GOALI/IUCP: Dynamic Analysis of High-Performance Drilling and Reaming Systems for Aerospace Manufactuirng

GOALI/IUCP：航空航天制造高性能钻孔和铰孔系统的动态分析

• 批准号: 9900108
• 负责人: Philip Bayly
• 金额: $ 24.34万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-06-01 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9900108&HistoricalAwards=false
• 关键词: GOALI; IUCP; Dynamic; Analysis; Performance

The goals of this Grant Opportunities for Academic Liaison with Industry (GOALI) project are to analyze the causes of tool vibration and hole roundness error in high-precision and high-speed drilling and reaming; and, to apply the results of this analysis to tool and process design for aerospace manufacturing. The work is a collaborative effort between researchers at Washington University in St. Louis and engineers at the Boeing Company. In metal cutting, vibrations are excited by forces on the tool's main cutting edges, as well as by impact and friction on the sides and clearance faces of the tool. The project will develop accurate models of reaming and drilling, including drilling in high-speed, automated stations. These models will take into account bending, axial, and twisting motion, and the effects of these deformations on cutting forces and friction. Analytical and numerical solutions will be obtained from these models to explain the major causes of vibration. Approximate nonlinear methods will be developed to find the amplitude and stability of vibrations in drilling. Experimental work will be conducted at Boeing's Advanced Manufacturing R&D facilities to validate the analytical and numerical results. Cutting and vibration tests on physical machines will be performed to provide parameters for mathematical models and to validate theoretical predictions. This project addresses the need to understand the precision hole-making process, which is critical to airframe manufacturing. A million or more holes may be drilled in the production of a single aircraft. Automated assembly, high-speed drilling, and advanced tool designs have the potential to dramatically increase productivity and decrease costs, but only if the complex dynamics of hole-making are understood.

GOALI项目的目标是分析高精度和高速钻孔和铰孔过程中刀具振动和孔圆度误差的原因，并将分析结果应用于航空航天制造的刀具和工艺设计。这项工作是圣路易斯华盛顿大学的研究人员和波音公司的工程师共同努力的结果。在金属切割中，振动是由刀具主切削刃上的力以及刀具侧面和间隙表面的冲击和摩擦所激发的。该项目将开发精确的铰孔和钻孔模型，包括在高速自动化车站进行钻孔。这些模型将考虑弯曲、轴向和扭转运动，以及这些变形对切削力和摩擦力的影响。将从这些模型中获得解析和数值解，以解释振动的主要原因。将发展近似非线性方法来求取钻井过程中的振动幅度和稳定性。实验工作将在波音公司的先进制造研发设施进行，以验证分析和数值结果。将在物理机器上进行切割和振动测试，为数学模型提供参数，并验证理论预测。这个项目解决了了解精密打孔工艺的需要，这对机身制造至关重要。在一架飞机的生产中，可能会钻出一百万个或更多的孔。自动化组装、高速钻孔和先进的工具设计有可能显著提高生产率和降低成本，但前提是必须了解复杂的打孔动态。