The multi-tasking Nakamura-Tome Super NTJ turning center completes multi-face angular machining and contour milling in a single setup, eliminating the need to refixture the part on another machine to perform secondary operations.
Features include a 5,000-rpm, 20-hp left-side spindle; a 5,000-rpm, 15-hp right-side spindle and a dodecagonal 24-station lower turret for both left and right spindles. The B-axis turret is capable of angular positioning to ±91 degrees from the horizontal, eliminating the need for angular workholders. The turret's direct drive provides high rigidity for milling, while the B-axis rotates at 180 degrees per second. Upper and lower turrets have maximum rotating tool speeds of 6,000 rpm, and each has a capacity of 24 tools for turning or 12 tools for milling. Rapid traverses and chip-to-chip tool change times of 0.85 seconds minimize cycle times.
The machine can be programmed with Luck-Bei II software. Tool offset values can be converted with a single G-code regardless of B-axis angle, and 3D rectangular coordinate conversion can be carried out even on an inclined plane. CNC solid animation, M-code list display and excess load detection software are also standard. Standard NT Work Navigator (torque type) software reduces the need for positioning jigs and fixtures.
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This machine can run for a long time without any operator intervention, and users can machine finished parts from slug stock or cast blanks while achieving the same high productivity as if they were machining from barstock, the company says.