Compact Five-Axis VMC Machines Complex Prismatic Parts

Doosan’s DNM 200/5AX five-axis vertical machining center is suitable for machining complex prismatic workpieces.

Doosan’s DNM 200/5AX five-axis vertical machining center is suitable for machining complex prismatic workpieces. The compact machining center is said to reduce setup time and ensure consistent accuracy while occupying a smaller footprint on the shop floor. The VMC features a built-in fourth- and fifth-axis trunnion table, enabling machining of multiple faces on complex workpieces without refixturing. The design is said to enable more Z-axis clearance than a traditional VMC with a rotary system placed on the standard table. The platter measures 7.87" in diameter and accommodates workpieces ranging to 11.81" in diameter and 7.87" in height, and weighing as much as 88 lbs.

The direct-coupled spindle drive system is a true cartridge-type unit supported by high-precision ceramic ball bearings said to offer minimal noise, vibration and thermal growth. The VMC’s 12,000-rpm, 15/25-hp motor provides 86 foot-pounds of torque with spindle acceleration and deceleration times of 2.16 and 2.21 sec., respectively. The machine’s linear guideways feature roller-type bearings for greater rigidity and longer lifespan. The one-piece bed is constructed of fine-grain Meehanite cast iron with heavy ribbing to help prevent vibration and deformation during heavy cutting. The wide spacing of the roller guideways is designed for improved support of the saddle; the table is fully supported by the saddle in all positions with no overhang. The rigid box-type column casting is heavily ribbed to help prevent twisting or distortion as well as damp vibration during high-speed or heavy machining.

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