Patent ID: 9707627
Date: 2017-07-18
CPC Classifications: B23C,Y10T

Claim:
1. A radius end mill comprising: a tool body; a cutting edge comprising: an end cutting edge located at a front end of the tool body, an outer peripheral cutting edge located at an outer periphery of the tool body, and a corner cutting edge located between the end cutting edge and the outer peripheral cutting edge; a rake surface comprising: an end gash connected to the end cutting edge, an outer peripheral cutting edge rake surface connected to the outer peripheral cutting edge, and a corner gash connected to the corner cutting edge and located in a region surrounded by the end gash, the outer peripheral cutting edge rake surface and the corner cutting edge; and a flute extending from the rake face to a rear end of the tool body; wherein the corner gash comprises an inner end portion which is located on a side of the end gash and an outer end portion which is located on a side of the outer peripheral cutting edge rake surface, the inner end portion is away from the end cutting edge and the outer end portion is away from the outer peripheral cutting edge, and an axial rake at the inner end portion is in the range of 5 to 20 degrees.