At CMTS 2019, Index and Mitcham Machine Tools will be demonstrating how to increase output per operator via integrated automation and single-machine production of complex parts. The former will be highlighted by the TNL20-11 Swiss-type lathe with an iXcenter automation cell, while a G220 turn-mill center will showcase the latter. The machines will be located in Mitcham Machine Tools booth 2561, which has doubled in size from previous years.

The TNL20-11 features eleven linear axes, frontworking attachment with six stations, autonomous counter spindle and two turrets, each with eight stations providing up to 12,000 rpm and 2.0 kW of power. The TNL20-11 can apply up to four tools simultaneously, and the lower turret can be equipped with a backworking attachment capable of allowing independent machining of the rear of a part. The machine offers identical, twin liquid-cooled spindles with up to 10,000 rpm, 5.5 kW of power and 17.2 Nm of torque.

When integrated with the iXcenter robot cell, the TNL20-11 becomes even more productive. With compact vertical storage of up to 14 pallets, this cell uses an articulated arm to load and unload parts and can incorporate secondary process operations or a 3D measurement device. This greatly increases the throughput potential of the machine without requiring a corresponding increase in operator intervention.

The G220 features fluid-cooled, identical main and counter spindles that provide power of 31.5/32 kW (100%/40%), torque of 125/ 170 Nm and maximum speed of 5,000 rpm. The fluid-cooled, five-axis motorized milling spindle is available in both HSK-T40 and HSK-T63 configurations. The HSK-T40 version offers power of 11 kW, torque of 19/30 Nm and speed of up to 18000 rpm, while the HSK-T63 version offers power of 17 kW, torque of 62/90 Nm and speed of up to 12,000 rpm. Both milling spindle options feature hydrostatic bearings in the Y and B axes, and a stable circular guide further ensures excellent rigidity and damping. The Y axis features a +/-80 mm stroke, while the B axis is driven directly by a torque motor and has a swivel range of -50/+230 degrees. With a large travel distance in the X direction, machining at up to 30 mm below the turning center height is possible.

The G220’s motorized milling spindle operates using a one-row tool chain magazine which features space for 70 tools for the HSK-T40 configuration or 50 tools for HSK-T63. An optional double-row tool magazine enables setup during machining and accommodates twice as many tools as the standard solution.

A tool turret is located in the lower part of the machine and can accommodate VDI 25 and VDI 30 tool mountings in 18 or 12 stations, respectively. All stations can be equipped with individually driven tools with power of 6 kW, torque of 18 Nm and a maximum speed of 7,200 rpm.