Feasibility Study of Machining with Ultrahigh-Pressure Directly Pumped Abrasive Slurries

这一建议提出了形成磨料水射流的新概念，这可能被证明是加工技术的另一个突破。预混浆将被直接泵送至55,000 psi的压力，形成功率密度比目前的磨料水射流系统高一个数量级的射流。直接泵送喷嘴的潜在优势包括：1)高能量传递效率，(2)形成磨料密集射流的能力，以及(3)形成直径小至0.003英寸的射流的能力（目前的磨料水射流为0.030英寸）。准备了实验装置，并进行了实验研究，以了解高压泥浆射流的流动特性及其加工能力。此外，还将进行技术经济分析。将评估高压泵送磨料浆的总体可行性，并确定未来研究的领域。

This proposal addresses a new concept of forming abrasive- waterjets that may prove to be another breakthrough in machining technology. Premixed slurries will be directly pumped up to 55,000 psi to form jets with a power density an order of magnitude higher than current abrasive-waterjet systems. The potential advantages of direct-pumping nozzles include: 1) high energy transfer efficiency, (2) capability of forming abrasive- dense jets, and (3) capability of forming jets with diameters as small as 0.003 inch (versus 0.030 inch for current abrasive- water jets). An experimental setup will be prepared, and an experimental investigation will be conducted to recognize some features of the flow characteristics of high-pressure slurry jets and their machining capabilities. In addition, a technical and economical analysis will be conducted. The overall feasibility of high-pressure pumping of abrasive slurry will be assessed and areas of future investigation will be determined.