The C 50 U machining center from Hermle is designed to meet the increasing need for machines capable of simultaneous 5-axis machining of large, complex parts in high-strength alloys. The C 50 U is suitable for industries such as aerospace, automotive, moldmaking and valve making.
With axis travels of 1,000, 1,100 and 750 mm in the X, Y, Z axes, respectively, the standard version can accommodate work pieces of up to 2,000 kg with a maximum part diameter of 1,000 mm and a height up to 810 mm.
"Incorporating Hermle's patented modified gantry design, the C 50 U is both rugged and compact and requires no special foundation," said a company spokesperson. Spindle speed is 18,000 RPM standard (9,000/12,000 RPM optional). The tool changer is incorporated in the machine base and is available with 60 or 42 pockets. Chip-to-chip time is approximately 7 seconds.
The C 50 U Dynamic is available with a Heidenhain iTNC 530 control or a Siemens S840D SL unit.
Ease of loading is facilitated by a crane-loading feature and a door opening up to 1,250 mm. Work platforms along the entire machine front and at the magazine load station are ergonomically designed to minimize operator fatigue.
In addition to a standard tilting table, the C 50 U is available with an NC swiveling rotary table, featuring a clamping surface of up to ¯ 700 mm, or the optional NC swiveling rotary table with a clamping surface of ¯ 1,150 mm x 900 mm. Both tables utilize an integrated torque motor (C-axis) and a tandem drive motor (A-axis). The RPM of the A-axis is 20 RPMs and the C-axis rotates at 30 RPMs. The A-axis is designed to increase flexibility by offering a swivel range extending +30/-115 degrees, and the C-axis rotates a full 360 degrees.
An optional pallet changing system is available in multiple sizes and configurations for partial to fully automated operation. Pallet change systems feature generously dimensioned doors for easy and ergonomic access to the work area and set-up station, the company said.
Hermle Machine President Robert Komljenovic said, "Hermle's entire C series was designed to offer our traditional high precision with increased production capability up to and including full automation. The C 50 U Dynamic, available with a wide range of options and configurations, has made this possible for manufacturers of large parts in many industries."
The C 50 U is also available in a C 50 U MT dynamic configuration. With axis travels of 1,000 mm, 1,100 mm and 750 mm in the X, Y and Z axes and a maximum table load of 1,000 kg, the C 50 U MT features speeds of up to 20 RPM in the swiveling A-axis and 500 RPM in the rotary C-axis. Equipped with Hermle's slender spindle design for deep-pocket milling and turning, it also features a manually adjustable balancing system integrated into the table to prevent damage from inertial torque.
A new laser-based tool measuring and breakage monitoring system assures the integrity of both milling and turning tools, the company said.
Other features include the elimination of chip collection on the table, torsion prevention through tandem drives and high-torque motors in the rotary axis.
"The single greatest advantage of the MT feature is the ability to perform multiple operations in full 5-axis mode in a single clamping," said Komljenovic. "Larger parts are especially susceptible to errors in positioning when being moved from one machine to another. In complex high-value parts, this can result in significant financial loss. By combining the machining and the turning processes, we can offer our customers what is in reality an automated process station with the highest precision capability."
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