Compact HMC Enables Heavy-Duty Cutting

The HC 400 horizontal machining center from Doosan is a compact, heavy-duty machine designed for OEMs and job shops. Featuring a Meehanite cast iron bed, linear roller guideway and inline spindle, the high-precision machine is capable of making heavy cuts on tough materials, the company says.

X-, Y- and Z-axis travels measure 23.62" × 22.05" × 22.24". Maximum cutting feed rate is 787 ipm with rapid traverse rates ranging to 1,574 ipm. Axes are driven by high-precision double-nut ballscrews supported on both ends by angular thrust bearings. The double-pretension design is said to improve positioning repeatability. The HMC’s 35-hp, 10,000-rpm inline spindle is designed for high stock removal and deep drilling operations. Through-spindle coolant and an oil-cooled spindle chiller help to maintain a constant temperature at high speeds, reducing thermal growth and increasing cutting accuracy. The cam-type, swing-arm automatic toolchanger accommodates 60 tools and is said to provide 4-sec. chip-to-chip times.

The machining center’s telescopic cover inclined at a 30-degree angle directs chips into a trough to keep the area around the table clean, while high-velocity air jets clear chips while pallets are being changed. An automatic pallet changer with twin tapped pallets helps to minimize set-up time and increase productivity. Each pallet measures 15.7" × 15.7" and can handle a maximum load of 882 lbs. The FANUC 32i-A control features a 90-degree swiveling operator console for improved ergonomics. The handheld manual pulse generator with 10-ft. cord enables full access to the machine and controls access movement in increments of 1, 10 or 100 for easy fixture or workpiece alignment.