The Effects of Chip-Groove Geometry and Three-Dimensional Chip Flow on Progressive Tool-Wear in Grooved Tools

小行星9624640 提供正确的三维（3-D）切屑流的切削刀具是增加刀具寿命和改善加工中切屑处理的一种方式。 通常断屑是通过切削刃上的槽来实现的，但是设计不良的槽会导致切削刃过早失效。 设计用于控制切屑接触面积和流动方向的3-D边缘几何形状需要包括槽几何形状的切屑流动力学模型。 这意味着需要基本的理解才能实现槽形三维工具的好处。 本计画将探讨复杂槽型刀具加工时之三维切屑流，以及由多种刀具磨损所造成的几何变化。 研究计划是：文件使用高速电影，切屑流动的力学，建立一个工具故障和沟槽刀具性能标准，同时多种磨损模式的沟槽刀具，并开发分析方法，可用于设计切屑控制和刀具寿命的切削刃。 这项研究将通过将基于平面的力学理论扩展到三维沟槽几何形状，提高对切屑形成和刀具磨损的理解。 有了这些知识，就可以设计切削刀具，而无需进行大量耗时的实验。

9624640 Jawahir Cutting tools that provide the correct three dimensional (3-D) chip flow are a way to increase tool life and improve chip handling in machining. Often chip breaking is achieved with a groove on the cutting edge, but a poorly designed groove can cause premature failure of the cutting edge. Designing a 3-D edge geometry for controlling the chip's contact area and flow direction requires a model of the mechanics of chip flow that includes groove geometry. This means that fundamental understanding is needed to achieve the benefits of grooved 3-D tools. This project will investigate 3-D chip flow in machining with complex grooved tools and the geometry changes caused by more than one type of tool wear. The research plan is to: document using high speed film, the mechanics of chip flow, establish a tool failure and grooved tool performance criterion for grooved tools with simultaneous multiple modes of wear, and develop analytical approaches that can be used to design cutting edges for both chip control and tool life. This research will improve the understanding of chip formation and tool wear, by extending the theory from mechanics based on planar faces to 3-D grooved geometry. With this knowledge, cutting tools can be designed without resorting to extensive and time consuming experiments.