NSERC/P&WC Industrial Research Chair in Virtual High Performance Machining

现代制造的目标是在第一次试验时准确地、最经济地生产昂贵的零件 在航空航天生产车间。主席的前两届任期见证了虚拟2.5轴的发展 铣削和5轴侧面铣削技术，自那以后已转移到工业中。在第三个任期内， 主席的研究将集中在燃气轮机叶片的5轴球头铣削技术上。 建立了通用的、可重构的、模块化的五轴机床运动学模型 在成本高昂的资本投资之前，对叶片加工进行虚拟测试。将对刀具路径进行平滑，以避免 沿五条轴路径的轴速度不连续。尖曲率周围的轮廓线误差 根据机床的数学模型，对叶片进行预测和补偿。时间 刀片沿刀具路径的不同结构动力学将被建模，并集成到虚拟 用于预测切削力、扭矩、功率、振动和尺寸形状误差的加工系统 叶片的五轴球头铣削。切割深度和宽度、主轴速度和进给速度将得到优化， 从而实现最经济、最精确的昂贵零件加工。当完成后，椅子将实现 基于科学的机床及五轴联动性能预测仿真优化系统 柔性叶片的虚拟球头铣削。该系统在航空航天、模具等行业有着广泛的应用 世界范围内的机械加工行业。 主席由NSERC和普惠加拿大(P&WC)公司赞助。P&WC是一个世界 在小型燃气轮机发动机的设计和制造方面处于领先地位，并拥有大量复杂的 3到5轴加工应用。这项研究还得到了主要 世界各地的国内和国际公司和研究中心。研究结果将在《开放》杂志上发表。 文献，该技术将通过虚拟加工软件和 培养研究生和实习工程师。

The objective of modern manufacturing is to produce costly parts accurately and most economically at first trial on aerospace production floors. The first two terms of the Chair saw the development of the virtual 2 ½- axis milling and 5-axis flank milling technologies, which have since been transferred to industry. In the third term, the Chair's research will focus on the technologies used in 5-axis ball end milling of gas turbine blades. A generalized, reconfigurable and modular kinematic model of 5-axis machine tools will be modeled for virtual testing of blade machining ahead of costly capital investments. The tool paths will be smoothed to avoid discontinuities in the axis velocities along five axis paths. The contouring errors around the sharp curvatures of blades will be predicted and compensated based on the mathematical model of the machine tool. The time varying structural dynamics of the blade along the tool path will be modeled, and integrated into the Virtual Machining System to predict cutting forces, torque, power, vibrations and dimensional form errors during 5-axis ball-end milling of blades. The depth and width of cuts, spindle speeds and feed rates will be optimized, leading to the most economical yet accurate machining of costly parts. When completed, the Chair will achieve a science-based simulation and optimization system to predict the behaviour of machine tools and the five-axis virtual ball end milling of flexible blades. The system has a wide application in the aerospace, die and mold machining industry worldwide. The Chair is sponsored by NSERC and Pratt & Whitney Canada (P&WC) Corporation. P&WC is a world leader in the design and manufacturing of small gas turbine engines, and has a significant number of complex 3- to 5-axis machining applications. This research draws additional support and collaboration from major national and international companies and research centres worldwide. The findings will be published in open literature, and the technology will be disseminated to industry through Virtual Machining Software and the training of graduate students and practicing engineers.