Development of a Water-Based Machining Technology

本研究计画的目标是发展一种“绿色”水基切削技术。 材料去除将通过超高速水弹对工件表面的冲击来进行。 耗水量及物料碎屑量将减至最低，且实际上不会产生排放物。 快速移动的活塞会形成水栓。 活塞将撞击装在枪管中的水弹，并在水中产生一组压力波。这些波浪将通过锥形喷嘴从桶中排出水栓。 段塞速度将达到几公里/秒。 在这样的速度下，废料将穿透大多数工程材料，并几乎腐蚀任何材料。 喷嘴将被集成到机器人工作单元中，用于精密和无排放的加工操作。 目前，通过强压力波的水加速用于拆除、采矿和军事应用。 这项技术将增强现有的信息，并将开发一个数学模型的高速水段塞的形成。 建模的结果将使我们能够建立一个实验室设置的过程的实验研究。 本文将研究喷嘴内外的水流流动以及段塞对基体的冲击。 结果，将改进由强压力波引起的流体加速的数学描述，并将获得开发所需技术所需的知识。 将开发加工系统的工业规模原型的概念设计。

The objective of this research project is to develop a "green" water-based machining technology. Material removal will be carried out by the impingement of the workpiece surface by ultra high-speed water slugs. The water consumption as well as amount of material debris will be minimal and practically no emission will be generated. A fast moving piston will form the water slugs. The piston will impact a water bullet contained in a barrel and will generate a package of pressure waves in water. These waves will expel a water slug from the barrel via a tapering nozzle. The slug velocity will reach several km/sec. At such velocity the slug will penetrate most of the engineering materials and will erode practically any material. The nozzle will be integrated into a robotic workcell and used for the precision and emission free machining operations. Currently, water acceleration by the strong pressure waves is used for demolition, mining and military applications. This technology will enhance available information and will develop a mathematical model of the formation of the high velocity water slugs. The result of the modeling will enable us to construct a laboratory set up for the experimental study of the process. The water flow within and outside the nozzle as well as the slug's impingement on a substrate will be investigated. As the result, the mathematical description of the fluid acceleration by the strong pressure waves will be improved and the knowledge necessary for the development of the desired technology will be acquired. A conceptual design of an industrial scale prototype of the machining system will be developed.