Research Initiation: Fundamental Study of Abrasive Water Jet Cutting

本项目涉及磨料水射流切割材料的实验和分析研究。新的和更难以制造的材料的出现导致了许多先进制造技术的发展，即所谓的非传统机械工艺，磨料水射流就是其中之一。数学模型将利用运动方程的水射流，磨料颗粒，以及能量平衡的冲击区。表征过程的无量纲数将被确定并用于开发与过程变量相关的回归方程。将进行实验研究以验证所选方程并评估系数。实验将包括穿孔和切割有机玻璃板，监测过程变量和估计切割性能。测量的变量包括水射流和磨料颗粒的速度，射流/固体界面处的力分布以及该界面的运动速率。激光测风、马赫线技术、高速摄影将用于测量速度。高速薄膜也将用于研究表面形成的动力学。表面的地形将通过构造（切割狭缝或缺口）复制品和表面的光学和电子显微镜来研究。该程序将为磨料水射流切割的优化和发展提供数据。

This project deals with both experimental and analytical investigations of the abrasive waterjet cutting of materials. The advent of new and more difficult-to-manufacture materials lead to the development of many advanced manufacturing techniques, the so- called non-traditional machine processes, of which abrasive waterjet is one. Mathematical models will be developed using the equations of motion for the waterjet, and the abrasive particles, as well as the energy balance in the impingement zone. Non-dimensional numbers characterizing the process will be determined and used to develop regression equations relating process variables. Experimental studies will be carried out to validate selected equations and evaluate the coefficients. The experiments will involve piercing and cutting plexiglass plates, monitoring process variables and estimating cutting performance. The measured variables include velocities of the water jet and abrasive particles, distribution of forces at the jet/solid interface and rate of motion of this interface. The Laser anemometry, Mach lines technique, high speed photography will be used to measure velocity. High speed filming will also be used to study the kinetics of surface formation. The topography of surfaces will be studied by constructing (cutting slit or notch) replicas and optical and electron microscopy of the surfaces. The procedure will enable generating data for optimization and development of abrasive waterjet cutting.