Video: The Role of Heat in High Speed Machining
In high speed machining of die/mold steels, the heat has a more beneficial effect than the role it plays in conventional cuts.
In high speed machining of hard steels, heat has a plasticizing effect that can benefit the cut. This effect is basic to high speed machining in die/mold applications. In the video from Expert Technical Training, animation illustrates the effect of heat in conventional milling and how this contributes to work hardening, versus the helpful effect of heat in climb milling at faster spindle speeds and feed rates.
Hard milling allows mold components to be machined in the hardened state, thus skipping several expensive and time-consuming processes such as electrical discharge machining and hand polishing.
Liquid coolant offers advantages unrelated to temperature. Forced air is the fluid of choice in this shop...but even so, conventional coolant can't be eliminated entirely.
Accessible control features play an expanding role in mold machining.