Designed for demanding applications, Yama Seiki’s Goodway GV-1 series vertical turning centers includes two different models with live turrets. The GV-1200M offers a maximum turning diameter of 1,350 mm and maximum weight load of 5,000 kg, while the GV-1600M offers maximum turning diameter of 1,800 mm and maximum weight load of 8,000 kg. Both models also feature a live tooling spindle and CF-axis capabilities, enabling turning, milling, contour milling and drilling applications to be completed on a single machine.
The turning centers’ heavily ribbed, thermally balanced, rigid bed and column are made of Meehanite casting capable of withstanding stress without deforming and providing vibration dampening. The contact surfaces of all slides, spindles and ballscrew bearing housings with the machine bed are hand-scraped to increase precision, structural rigidity and load distribution.
The crossrail is mounted with four sets of up/down-positioning mechanisms to provide strong locking/positioning at each point, which strengthens the overall rigidity of the crossrail and tooling spindle, the company says. The crossrail is designed with a box-shaped structure to prevent thermal displacement and ensure machine stability during turning operations. W-axis travel ranges to 800 mm to increase machine flexibility. Pre-tensioned ballscrews with ground box ways also increase rigidity for heavy-duty cutting.
Instead of using partial belts, the series uses gears to connect the spindle motor and work table. According to the company, when combined with a high-torque two-speed gearbox with a 40/6000i series spindle motor, the machine increases output for heavy-duty cutting.
The optional CF-axis and disc brake system uses a worm-gear drive system for transmission and easy backlash adjustment, the company says. The indexing accuracy reaches approximately 0.001 degree. Working with the live-tooling turret, the CF-axis and disk brake system enables the machine to perform multiple tasks, such as drilling, tapping, and milling operations (including cylindrical and polar coordinate interpolations).