Modern Machine Shop
The eight-spindle ZPS 867 CNC multi-spindle production center features a double Siemens 840 D CNC control and is designed to accommodate stock ranging to 72 mm in diameter.
As many as 72 CNC axes are available for drilling, tapping, milling, broaching and hobbing precision parts. The machine features a cast iron base for rigidity and a 191-nm spindle torque for turning difficult materials.
The line can produce precision parts as either a bar-fed or chucker operation. Standard features include eight independent, AC-driven, CNC horizontal spindles; eight independent, compound slides (X and Z); eight independent tool carriers with eight, 12000-rpm driven tools; five backworking tools (three driven); and a range of standard presettable VDI tooling for quick change-over.
Each of the machine’s eight spindles is linked by a composite shaft to its own motor into the spindle drum, which employs a Hirth coupling. According to the company, this makes it unnecessary to reverse-index the drum at the end of each 360-degree cycle; connect and disconnect the motors to the spindles with each indexing; and cool the drum to dissipate the heat generated by the spindle motors. This is said to increase precision and reliability across high duty cycles. Also, spindles can be indexed in 1 sec.