Occupying just 3.8 square metres of space on the shop floor, a new, 5-axis machining centre with a working volume of 220 x 370 x 290 mm has been introduced by DMG Mori. The new DMU 20 linear is capable of a wide range of applications, from micro-machining of watch components, through EDM electrode and impeller production, to die and mould making.
A rigid, FEM-optimised cast bed and thermo-symmetrical gantry design have been coupled with Magnescale axis position measuring systems to ensure long-term stability and a high level of machining accuracy to within single-figure microns.
The A-axis trunnion swivels from +130 to -93 degrees, allowing flexible machining strategies and enhancing the operator’s view of the workpiece. The C-axis table rotates at up to 150 rpm, optionally 1,500 rpm, and it can be positioned to an accuracy of two arcseconds. Zero-point clamping is standard, with the customer able to choose Erowa, Schunk or another make. There is also provision for vacuum clamping of delicate or thin-walled workpieces.
The machine is equipped with a powerful Fischer spindle (HSK 32, 42,000 rpm) as standard, although HSK 32 or HSK 40 spindles up to a maximum of 60,000 rpm are available. If elevated levels of precision are required combined with long running times, a shaft-cooled version is available for the HSK 40 variant. The tool magazine offers 26 pockets, or optionally up to 60 tools, suitable for flexible production requirements with frequent tool changes.
The DMU 20 linear enables efficient and productive machining through the integration of tool measurement using a Blum laser system in the working area, integrated into the side of the machine table. In preparation for the measuring cycle, the A-axis is swivelled through 90 degrees.
Numerous other options allow the DMU 20 linear to be customised. Examples are a treatment package to allow oil to be used as a coolant, oil-resistant hoses and electrostatic extraction of fine particulates. There is an interface for a conventional or a CO2 fire extinguishing system. In addition, a digital camera is available to provide a clear view of the machining process.
DMG Mori developed the DMU 20 linear to be easily automated via a plug-and-play interface, for example with the manufacturer’s own PH 10, PH 50 or MATRIS light systems. The intuitive CELOS X user interface on a Siemens SINUMERIK ONE control paves the way for networked production and digitalised processes.
Innovative GREENMODE hardware and software reduce energy consumption by over ten percent, enabling more sustainable manufacturing. For machining hard, brittle materials such as glass, Zerodur or technical ceramics, the machine is available as a third-generation ULTRASONIC 20 linear. In this machine, tool rotation is superimposed with an additional ultrasonic oscillation, reducing the force generated by the tool during machining by up to 50 percent.
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