With twin spindles and four turrets, the Nakamura-Tome WTW-150 is said to turn even complex precision parts relatively quickly, all in one setup. Independent slides, 13 controlled axes, equal left and right machining and 48 stations of flexible tooling are some of the product’s features.
Dual Fanuc CNCs allow independently programming each spindle, permitting a range of machining strategies. Each spindle is capable of independent four-axis turning, and each offers C-axis control for spindle positioning and continuous feed. Thus operators can use both spindles and allow four turrets to machine both ends of a part simultaneously, which can, in turn, reduce cycle times. By using the upper and lower turrets to perform concurrent milling and drilling operations, operators can also eliminate the need for part refixturing on a machining center for secondary processing.
According to the company, the machine’s polygonal turning capacity produces squares and hexagons at high speeds to chamfer, flat-face and taper polygons in the middle of the workpiece (if needed). The twin spindles have 6" chucks and can achieve speeds ranging from 4,000 rpm to 8,000 rpm (depending upon bar size) in 3.6 seconds. A 10-hp motor directly drives each spindle with virtually no slippage or vibration. Maximum turning diameter is 12.20", and the maximum turning length is 10.04".
Other features include a 5-hp milling spindle that can reach speeds as high as 6,000 rpm in 0.4 seconds; each of four turrets hold 12 live tools for milling, drilling and tapping; a 1.4-second chip-to-chip time; and an interactive control with 3D animation to visually depict the work progression.
Editor PickTurn-Mill Machine’s Backworking Operation Offers Cycle Time Reduction
This backworking operation achieved with five front live tools allow as much as 40 percent cycle time reduction.