Whats So Different About HSM?
not much. We replace a process consisting of a few slow and heavy cuts with a process consisting of more numerous, faster, lighter cuts. The chips produced are much smaller, but they come off a whole lot faster. The main reason high speed machining works is the smaller depth of cut. The smaller depth means less heat is generated in the cut. With less heat in the cut, the rpm can be dramatically increased. And since the chip load per tooth stays the same or is even increased, a much higher feed rate can be achieved to correspond with the increased rpm. Example: Conventional rough machining with 2 flute 1/2 inch ball nose end mill • Speed: 900 rpm Feed: 14 ipm • Chip load: 0.008 ipt • Depth of cut: 0.25 inch • Step-over: 0.5 inch • MRR: 1.75 cubic inches per minute High speed machining with the same diameter tool • Speed: 9,200 rpm • Feed: 147 ipm • Chip load: 0.008 ipt • Depth of cut: 0.05 inch • Step-over: 0.25 inch • MRR: 1.83 cubic inches per minute From this example you can see that
