High-Speed VMC Reduces Non-Cutting Time
IMTS 2018: Doosan Machine Tools’ DNM 5700S VMC is designed to cut at high speed and to reduce non-cutting time.
Doosan Machine Tools’ DNM 5700S is a high-speed version of the DNM VMC that is designed to reduce non-cutting time.
A 25-hp, directly-coupled, 40-taper Big-Plus spindle features 87 foot-pounds of torque and accelerates from 0 to 15,000 rpm in 3.6 sec. Rapid traverse rates have been increased to 1,654 ipm in the X and Y axes and to 1,417 ipm in the Z axis.
A wide cast frame with eight leveling positions and roller LM guideways on the X, Y and Z axes improve machine rigidity and stability. The VMC also features 3D computerized analysis. Its 51.2" × 21.3" table can hold a maximum weight of 1,764 lbs.
The machine features a 30-tool magazine, with 40- and 60-tool, servo-driven versions available. Easy Operation Package software contributes to ease of use, while an oil-cooled spindle controls heat. The machine comes with a grease lubrication system designed to reduce maintenance costs. It uses a coolant that is intended to eliminate the need for an oil skimmer.
Milling complex forms in hardened tool steel involves more than just fast, light cuts, says this maker of medical-related injection molds. Here are some of the ingredients of an effective hard milling process.
Cryogenic machining achieves dramatic tool life gains not by flooding the cut, but by refrigerating the tool.
The recipe for best results is simple: Start with a rigid machine, add a high pressure through-the-spindle coolant system, then combine these with the right drill geometry plus the right speeds and feeds.