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05-11-2013 #1
Hello,
I am trying to calculate the required plunge depth for a v cutter needed to produce a given diameter of hole.
Can someone explain the formula I need?
Thanks!
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EDIT:
Answer:-
Z = Depth of cut
d = Required diameter of cut
a = Cutter tip angle in degrees*
f = Flat spot
r = Tip radius
V Groove type cutter with no flat spot.
Z=d/(2*tan(a/2))
V Groove type cutter with flat spot.
Z=(d-f)/(2*tan(a/2))
V-Groove type cutter with a radius tip.
Z=r-(r^2-d^2/4)^0.5, for Z<=2r
Z=r+(d-2r)/(2*tan(a/2)), for Z>2r
Ballnose type cutter.
Z=r-(r^2-d^2/4)^0.5, for Z<=2r
* The TAN() function in some applications (such as Excel) require the angle to be expressed in radians, Not degrees. Convert degrees to radians - Radians = angleInDegrees x (PI/180)
So in excel the first formula above would become:-
Z=d/(2*tan((a*(PI()/180)/2))Last edited by cncJim; 06-11-2013 at 12:58 PM.
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