Twin Spindle CNC Lathes Get Automated Unloading
The patented VacExtract vacuum extraction unloading device is designed to keep twin spindle CNC lathes working even while one workpiece is being unloaded. Production of large workpieces on twin-spindle CNC lathes has typically been limited by the need to shut down the machine while workpieces were unloaded. Operators would have to idle both spindles while workpieces were unloaded or ejected into a part unloader from the other spindle.
The VacExtract does for the backend (the unloading end) of CNC lathes what barfeeds and magazine-type loaders have done for the frontend (the loading end)—namely, automating the process. VacExtract's innovative design removes workpieces through the rear of the right spindle in less than 2 seconds—while the left spindle continues to work. The result is that metalcutting time of the lathe is maximized and the operator is freed to attend to several CNC lathes at one time.
The VacExtract device works on vacuum, just like a vacuum cleaner. Programmed via the lathe's own CNC control, the VacExtract creates a vacuum inside the spindle bore—at the right moment—gently extracting the workpiece and allowing them to accumulate on a tilt table. Because workpieces are handled gently, the device is well-suited for production of ground bar stock or pre-plated shafing—without marring surfaces.
Virtually any workpiece that can be pulled through a spindle can be unloaded using the vacuum extraction, even heavy-wall tubing. The unloader has a footprint small enough to work on machines equipped with chip conveyors and high-pressure coolant pumps. The tilt table design allows for easy access to the rear of the machine during setup and maintenance.
The system receives power from the lathe's own power supply and runs on standard shop air. The unloader can work with lathes equipped with chucks, collet chucks, or dead-length collet chucks. Each system includes one plastic spindle liner assembly configured for the specific lathe and diameter required. Changing from one size to another is simple and takes only minutes.
The VacExtract is distributed by Hydromat Inc, a leading manufacturer of rotary, inline, and trunnion-type precision transfer machines, as well as of the Rismat line of rotary machines for secondary processing.
Hydromat Incorporated, 11600 Adie Road, St. Louis, MO 63043; phone: 314-432-4644