Tool Tuning for High Speed Machining

Smith在许多制造操作中，特别是在航空航天工业中，必须通过铣削从工件上去除大量材料。通常，颤振的发生是这种操作的生产率的限制因素。以前的尝试，以提高金属去除率的假设，工具的动态特性是固定的，和切削参数的操纵，以解决他们。在该项目中，主轴性能特性被认为是固定的，而刀具的动态特性被操纵，使得刀具和主轴在某一速度下都表现得最好。这一努力的结果将是一套切削刀具的加工操作与可调的动态特性和程序，快速，方便地进行调整或选择。 将探索至少四种用于调整工具的动态参数的方法：1）工具长度调整，2）内部质量或外部质量的轴向位置的调整，3）从工具内部去除材料，以及4）从工具外部去除材料。 该项目的成功完成将导致一种方法来生产一套最佳的调整工具的机器。调整一套刀具以在较窄的主轴速度范围内表现良好的能力将大大简化未来的高速主轴开发，因为主轴只需要在该较窄的速度范围内运行。

DMI-9734925 Smith In many manufacturing operations, particularly in the aerospace industry, large amounts of material must be removed from workpieces by milling. Frequently the onset of chatter is a limiting factor in the productivity of such operations. Previous attempts to improve the metal removal rate have assumed that the dynamic characteristics of the tool are fixed, and the cutting parameters are manipulated to account for them. In this project, the spindle performance characteristics are considered as fixed, and the dynamic characteristics of the tool are manipulated so that both the tool and the spindle perform best at a speed. The results of this effort will be a set of cutting tools for machining operations with adjustable dynamic characteristics and a procedure for quickly and easily making the adjustment or selection. At least four methods for adjusting the dynamic parameters of the tool will be explored: 1) Tool length adjustment, 2) Adjustment of the axial position of an internal mass or external mass, 3) Material removal from the interior of the tool, and 4) Material removal from the exterior of the tool. Successful completion of this project will lead to a way to produce a set of optimally tuned tools for machines. The ability to tune a set of tools to perform well in a narrow spindle speed range will greatly simplify future high-speed spindle development because the spindle will only need to operate in that narrow speed range.