Mid- to large-sized machining center from Doosan for high-precision machining
Doosan Machine Tools has launched a new vertical machining center (product name: DNM 750 II series) that delivers improved machining performance due to its new high specification spindle.
The spindle is based on the direct drive(DNM 750 Ⅱ, DNM 750L Ⅱ) concept (motor is coupled in line directly to the spindle unit) and offers an increased level of reliability and performance. Its 12000rpm capability offers high speed, high precision machining for a wide range of materials. Heavy duty cutting(DNM 750/50 Ⅱ, DNM 750L/50 Ⅱ) is also enhanced by the face/taper spindle which is included as a standard feature.
The direct drive spindle design means that thermal displacement is drastically reduced, thereby improving workpiece accuracy. In addition, spindle acceleration / deceleration time is reduced to improve productivity.
The spindle design concept also minimises vibration during high rpm operation, thereby improving surface finish and precision of the workpiece.
Machine stability is optimized by adopting a highly rigid C frame structure, based on state-of-the-art CAD design technology and FEM analysis. The application of large size roller guideways provides optimum rigidity for heavy duty cutting.
