Combination end milling/drilling/reaming cutting tool
A combination end milling/drilling/reaming cutting tool includes an end milling portion, a drilling portion, and a reaming portion. The cutting tool also includes a neck portion between the end milling portion and the drilling portion, and a clearance neck portion between a shank and the reaming portion. A method of machining a workpiece using the combination end milling/drilling/reaming cutting tool is also disclosed.
1. A combination end milling/drilling/reaming cutting tool comprising:
an end milling portion;
a reaming portion;
a drilling portion between the end milling portion and the reaming portion;
a neck portion between the end milling portion and the drilling portion; and
a clearance neck portion between the reaming portion and a shank.
2. The combination cutting tool of claim 1 , wherein the end milling portion has a first diameter, the drilling portion has a second diameter larger than the first diameter, and the reaming portion has a third diameter that is larger than the second diameter.
3. The combination cutting of claim 1 , wherein the neck portion has a diameter smaller than a diameter of the clearance neck portion.
4. The combination cutting tool of claim 1 , further comprising a tapered surface between the neck portion and the drilling portion and a tapered surface between the reaming portion and the clearance neck portion.
5. The combination cutting tool of claim 1 , further comprising a tapered surface between the drilling portion and the reaming portion.
6. A combination end milling/drilling/reaming cutting tool comprising:
an end milling portion;
a reaming portion; and
a drilling portion between the end milling portion and the reaming portion, wherein the end milling portion, the drilling portion and the reaming portion include a plurality of spiral cutting flutes, and
wherein the plurality of cutting flutes in the end milling portion are formed at a first angle with respect to a longitudinal axis of the cutting tool, and
wherein the plurality of cutting flutes in the neck portion are formed at a second angle with respect to the longitudinal axis of the cutting tool at a distance from an end of the cutting tool.
7. The combination cutting tool of claim 6 , wherein the plurality of flutes in the drilling portion are formed at a third angle with respect to the longitudinal axis of the cutting tool at a predetermined diameter of the drilling portion.
8. The combination cutting tool of claim 7 , wherein the first angle is substantially equal to the third angle.
9. A combination end milling/drilling/reaming cutting tool comprising:
an end milling portion;
a drilling portion;
a reaming portion;
a neck portion between the end milling portion and the drilling portion;
a shank; and
a clearance neck portion between the reaming portion and the shank,
wherein the end milling portion has a first diameter, the neck portion has a second diameter smaller than the first diameter, the drilling portion has a third diameter that is larger than both the first and second diameters, the reaming portion has a fourth diameter that is larger than the first, second and third diameters, and the clearance neck portion has a fifth diameter that is smaller than the third and fourth diameters and larger than the first and second diameters.
10. The combination cutting tool of claim 9 , wherein the end milling portion, the drilling portion and the reaming portion include a plurality of spiral cutting flutes.
11. A method of machining a workpiece using a combination end milling/drilling/reaming cutting tool comprising an end milling portion, a drilling portion, and a reaming portion, the method comprising:
positioning the cutting tool with respect to the workpiece to begin a machining cycle;
drilling a hole in a first layer of material with the end milling portion of the cutting tool using an orbital drilling operation;
positioning the cutting tool such that a longitudinal axis of the cutting tool is substantially aligned with an axis of the hole;
drilling the hole in a second layer of material with the drilling portion of the cutting tool using a push drilling operation; and
reaming the hole with the reaming portion of the cutting tool using the push drilling operation.
12. The method of claim 11 , further including the step of removing burrs from the hole using a tapered surface using a helical interpolation drilling operation or a circular drilling operation.