The key to the design of MAG’s NBH 630 is its swiveling head. The capability for simultaneous 5-axis machining of freeform contoured surfaces and mill/turn operations expands the range of applications.
Machine tool builder MAG has developed a modified version of its NBH 630 horizontal machine center that incorporates a round pallet, effectively converting the unit into a turning system. With a clamping surface diameter of 800 mm and the ability carry part weighing up to 1,500 kg, the torque rotary table accelerates quickly up to 800 rpm.
The new design incorporates an NC-controlled swivel head that allows a turning tool to convert from the horizontal to the vertical orientation at 80 rpm. The spindle, with an HSK 100 holder, is clamped by Hirth gears for a safe turning operation.
MAG designs machine tools and systems for a wide range of brands, including Cincinnati, Cross Hüller, Fadal, Giddings & Lewis, Hüller Hille, Witzig & Frank, Hessapp, Ex-Cell-O, Honsberg and Boehringer. Its new NBH 630 MT was unveiled this fall at the AMB International Exhibition in Stuttgart, Germany. The machine’s drilling capabilities and outer and inner turning processes were demonstrated on an aluminum turbine housing.
The torque table and the swivel head coordinate to change the NBH 630 MT into a universal mill-turn center.
The torque motor-driven swivel head also can be used for milling, drilling and threading in different angular positions. The swiveling range spans from -180° to +180°. According to MAG, the machine’s capability for simultaneous 5-axis machining of freeform contoured surfaces (e.g. die and mold products, aerospace parts) extends the machine’s range of applications.
MAG emphasizes that users of the new machine can achieve complete, five-sided machining in one set-up, with optimal precision and accuracy. Other operating advantages would include fewer setups, contributing to product quality improvements and consistency, and shorter lead times. The direct-drive rotary axis of the torque table gives the operators excellent control, with no mechanical backlash, according to MAG.
The machine builder added that cost savings may be gained by reducing the need for fixturing hardware, and that the capital investment may result in lower unit production cost.
