Modeling of Three Dimensional Machining by Abrasive Waterjet

磨料水射流三维加工建模

• 批准号: 9523010
• 负责人: Alan Male
• 金额: $ 23.24万
• 依托单位: University of Kentucky Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9523010&HistoricalAwards=false
• 关键词: Modeling; Three; Dimensional; Machining; Abrasive

9523010 Kovacevic Abrasives in suspension in a waterjet are used for cutting, hole making and duburring of titanium, ceramics, or other hard or difficult to machine materials. These are one or two dimensional applications of this process, but there are opportunities for three dimensional processing as well. Before a 3D process can be developed, a fundamental process model including the kinematics of the multiphase jet, the fluid-solid interaction at impact, and the fracture mechanics of the workpiece material is needed. Before material is removed from the workpiece by fracture, the kinetic energies of many abrasives impact the surface. As a result, a key part of this modeling work will be tracking the erosion history of the water jet on a section of the workpiece surface using a computational memory cell. This process model will be able to predict the amount of material removed by many abrasives in the jet, and the geometry of the surface produced by the jet. Like the cutter in conventional machining, the kinematics of the waterjet is guided by a controller. Experiments to verify the process model, the coupling between the depth and particle velocity, and surfaces generated are part of the research. To demonstrate 3D abrasive waterjet machining as a process, it will be used to produce a sphere. The impact of this research could be extremely high when fabricating complex shapes in high strength, high performance materials. ***

9523010 Kovacevic水射流悬浮磨料用于钛，陶瓷或其他硬或难加工材料的切割，打孔和去毛刺。这些是该过程的一维或二维应用，但也有机会进行三维处理。在开发三维工艺之前，需要建立一个基本的工艺模型，包括多相射流的运动学、冲击时的流固相互作用和工件材料的断裂力学。在材料通过断裂从工件上移除之前，许多磨料的动能冲击表面。因此，该建模工作的关键部分将是使用计算存储单元跟踪工件表面部分水射流的侵蚀历史。该过程模型将能够预测许多磨料在射流中去除的材料量，以及射流产生的表面几何形状。与传统加工中的刀具一样，水射流的运动是由控制器引导的。实验验证了过程模型，深度和粒子速度之间的耦合以及生成的表面是研究的一部分。为了演示3D磨料水射流加工作为一个过程，它将用于生产一个球体。当用高强度、高性能材料制造复杂形状时，这项研究的影响可能非常大。＊＊＊