Redesigned Gang-Type Lathe Delivers Long-Term Precision
The Wasino G-07 high-precision lathe has been redesigned to employ the unified DMG MORI design. The machine’s gantry-type tool post reduces cycle times by achieving “zero indexing time.” Featuring a long, 490-mm X-axis travel, the lathe is said to provide the high accuracy of a gang-type lathe, enabling more accurate finishing and hard turning.
The G-07 lathe has a symmetrical structure with respect to the spindle center, and the minimum distance between the axis travel reference guide and the spindle helps minimize the effects of heat. Induction-hardened, single-piece horizontal slideways integrated on the bed provide good vibration damping, high thermal stability and high rigidity. The slidways’ resistance to chatter makes it possible to lower the position of the center of gravity between the floor and the feed system, promoting stable machining accuracy over the long term. The flat-V slideways on the Z axis and dovetail slideway on the X-axis dovetail ensure high rigidity and straightness. The ballscrew support bearing is placed as close to the spindle as possible to suppress thermal displacement; a reliable pre-tension structure is also employed to boost precision. Such features combine to enable the G-07 to achieve dimensional accuracy of 3 microns even from a cold start and circularity of 0.5 micron, the company says.
DMG MORI provides several loader and workpiece stocking systems as well as other peripherals for this machine. Automation solutions include gantry loaders, conveyors for material loading and finished part unloading, single- and two-axis palletizers, and rotary stockers. Peripherals include a part catcher, external measuring unit and tool setter to facilitate setups and other tasks; a semi-dry unit, coolant chiller and high-pressure coolant unit to support machining operation; and a chip conveyor and mist collector to maintain clean work environment.
The right choices in tooling and technique can optimize the thread turning process.
The additional rotary milling axis on these machines allows them to complete many types of complex parts in a single setup, but these machines have gained a reputation for being difficult to program. Today’s CAM software, however, eases the programming challenge significantly.
One of the largest vertical turning and milling centers in the country will be installed in this Cincinnati-area job shop. Although installing the foundation for this huge machine was a massive undertaking, the company is building on other “foundations” as well.