Small Grant for Exploratory Research: Chip-Breaking in Turning

这项研究的目标是建立一个详细的、定量的、经过实验验证的、使用高压两相冷却剂的切屑断裂过程模型。切屑控制系统将这种高压两相流切削液注入切屑形成区。流体流将成形切屑分成几小段。虽然这一过程在实践中相对简单，但其细节尚不清楚。这项研究的目的是通过假设一个合适的模型来对这种新的芯片控制方案有一个基本的理解。分析模型将切屑折断过程与加工和切屑控制系统条件联系起来。这项研究的最终结果将是一个经过实验验证的模型，该模型可以用于预测给定的加工材料特性、切割条件以及冷却剂和冷却剂流动特性时的断屑长度。此外，实验工作将包括已加工表面光洁度和刀具磨损的测量。这些结果本身将是有用的，也将表明芯片控制系统对芯片形成过程的影响程度。

The goal of this research is to develop a detailed, quantitative, experimentally verified model of the chip breaking process using high pressure, two-phase coolant. The chip control system injects this high pressure, two-phase stream of cutting fluid into the chip formation zone. The fluid stream breaks the forming chip into short segments. While this process is relatively simple in practice, the details of it are not known. The research is aimed at developing a fundamental understanding of this new chip control scheme by postulating an appropriate model. The analytical model will relate the chip breaking process to machining and chip control system conditions. The end result of this research will be an experimentally verified model which can be used to predict broken chip length given work material properties, cutting conditions, and coolant and coolant flow characteristics. Further, the experimental work will include measurements of machined surface finish and cutting tool wear. These results will be useful in themselves and will also indicate the extent of the effects of the chip control system on the chip formation process.