Patent ID: 9067265
Filing Date: 2015-06-30
Classification: B23B,B23C,B23Q,Y10T

Abstract:
1. A cutting method for cutting a work comprising: rotating a rotary tool with a single circular cutting edge around an axis thereof while supplying a cutting fluid thereto, performing cutting by moving the rotary tool in a direction of the axis of the rotary tool with the rotary tool rotating in a first rotational direction around the axis of the rotary tool and at a rotational speed at which a circumferential speed of the cutting edge is higher than an outflow speed of the chips, wherein the circumferential speed of the cutting edge being higher than the outflow speed of the chips generates a dynamic pressure effect that draws the cutting fluid into a frictional portion thereby providing a film of the cutting fluid between the rotary tool and the chips to prevent solid contact and suppress abrasion of the rotary tool during cutting, and wherein the first rotational direction of the rotary tool is an outflow direction of chips, and wherein the rotary tool has a cutting face in which a plurality of grooves are arranged in a direction intersecting with the single circular cutting edge, and the plurality of grooves do not extend to a peripheral line of the cutting edge whereby a coefficient of friction of the rotary tool is lowered.