Cutting by use of rotating axially moving tool – Tool or tool with support
Patent
1994-06-28
1995-08-22
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Tool or tool with support
408211, 408223, 408229, 408705, B23B 5100
Patent
active
054435854
ABSTRACT:
A cutting edge 18 is provided on the end of a cutter tip 12 on a gun drill body 1. The cutting edge 18 has: a radially inner region providing a convex curved cutting edge portion 23, a radially outer region providing a straight cutting edge portion 19 and an intermediate region which provides a concave cutting edge portion 22 having a tapered portion 20 and a concave portion 21. The convex curved cutting edge portion 23, when viewed in the direction of the axis O, presents an arc shape, the radius R of the curvature of which is determined in relation to the outside diameter D of the gun drill so as to range from 0.1.times.D to 0.4.times.D. Thus, a gun drill is provided which exhibits an enhanced severing effect to cut metal chips into pieces so as to prevent clogging, as well as to prevent an increase in the cutting resistance, thus meeting the demand for a greater feed rate.
REFERENCES:
patent: 4373839 (1983-02-01), Negishi et al.
patent: 4395169 (1983-07-01), Kashiwagi et al.
Kawase Haruo
Matsumoto Katsunori
Nakamura Shin-ichi
Howell Daniel W.
Mitsubishi Materials Corporation
LandOfFree
Gun drill does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gun drill, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gun drill will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2138767