Thanks to a motorized milling spindle capable of five-axis milling and a tool turret with Y-axis, the INDEX G220 turn-mill can execute virtually any turning or milling machining process quickly. The compact machine performs high-quality turning and five-axis milling within a footprint of approximately 10 m2 (excluding bar loader).
With a distance of 1280 mm between the main and counter spindle and a maximum turning length of 1000 mm, the G220 offers ergonomic access to main and counter spindles, the turret and the motorized milling spindle, and the machine’s touch screen operating panel.
The identical main and counter spindles are fluid-cooled and feature a clearance of 65 mm (chuck up to max. 250 mm diameter) and power of 20/ 24 kW (100%/40%), a torque of 135/ 190 Nm and a maximum speed of 5000 rpm.
The spindle center is located 1350 mm above the ground. A tool turret is located in the lower part of the machine. The G220 uses VDI 25 and VDI 30 tooling with 18 or 12 stations, all of which can be equipped with individually driven tools (power 6 kW, torque 18 Nm, speed 7200 rpm).
The 18000-rpm, five-axis motorized milling is fluid-cooled and has hydrostatic bearings in the Y/B-axes. The stable circular guide further ensures excellent rigidity and damping. The Y-axis features a +/-80 mm stroke, the B-axis driven directly by a torque motor has a swivel range of -35 to +215 degrees. With a large travel distance in the X-direction, machining at up to 30 mm below the turning center height is possible.
The motorized milling spindle operates using a one or optionally two-row tool chain magazine which features space for 70 or 140 tools (HSK-A40). The stations feature a tilting basket design which protects the tools against contamination from oil and chips.
In order to dissipate the heat produced in the fluid-cooled spindles and the control cabinet, INDEX has integrated a hydraulic circuit with interface which enables connection to a decentralized cooling unit or a central cooling system.
Almost all commonly available bar loading magazines can be connected to the G220 turn-mill center. The new version of the INDEX bar loading magazine MBL (option), however, offers the specific advantage of guiding the bars in roller bearings. Irrespective of the bar speed, this results in an extremely precise and low-vibration bar guide. The INDEX MBL is suitable for bars of up to 65 mm diameter and a length of optionally 3200 mm or 4200 mm.
The INDEX G220 features a CNC-controlled and CNC-programmable gantry-type removal unit for gentle removal of finished workpieces. It can unload both remnants from the main spindle and finished parts from the counter spindle.
The use of the latest capacitive touch technology – which can be used even when wearing gloves – makes it possible to incorporate numerous rotary and touch buttons of the machine control panel directly in the screen. A touch with the finger is sufficient to activate functions.
The operating panel also includes a second input which INDEX uses for its own Virtual Machine (VM) (option). By pressing a button, the operator can switch to “VM on Board” and make use of simulation, irrespective of current machine operations.