Sinusoidal angled rotary cutting tool

Abstract

It is the object of the present disclosure to provide an improved end mill that can be easily manufactured, reduces cutting forces on the driving tool, limits chatter at high rotation speeds, has better stability, produces smoother cutting surfaces, and has less natural resonating frequencies while in use to permit operation of the end mill over a wider range of operating conditions. The end mill is equipped with a series of sinusoidal cutting edges with a single long pitch arranged regularly or irregularly along the circumferential cutting surface. In another embodiment, the pitch, the cutting angle of the datum line of the sinusoidal cutting edges and the amplitude of the sinusoidal function can be varied.

Description

technical field [0001] This disclosure relates to the field of rotary cutting tools, and to a class of tools known as end milling cutters. More specifically, the present disclosure relates to a low resonance end mill having a plurality of sinusoidal circumferential cutting edges. Background technique [0002] High-speed rotating cutting tools are used in metal cutting processes. One of the main goals in designing end mills is to create cutting surfaces that remove large amounts of material quickly while leaving a relatively smooth surface on the workpiece. It is also desirable to minimize cutting forces to reduce the power required to drive the tool. [0003] A smooth surface is obtained if the cutting surface of the end mill remains vertical and does not vibrate during use. Vibration of a long straight body produces undesired bending along its major axis. Vibration (often also called chatter or chatter) of a rotating cutting tool is produced by the tool body being excit...

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Problems solved by technology

The end mill must also be easy to manufacture and free from localized areas of shear weakening

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