Compact five-axis machining centre has many options, including ultrasonics

Occupying just 3.8 sq m of space on the shop floor, a new five-axis machining centre with a working volume of 220 x 370 x 290 mm has been introduced by DMG Mori. The DMU 20 linear is capable of a wide range of applications, from the 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 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 is positionable to an accuracy of two arcseconds. Zero-point clamping is standard, with the customer able to choose Erowa, Schunk or another make. Provision for the vacuum clamping of delicate or thin-walled workpieces is also available.

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 offered 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 support customisation of the DMU 20 linear. Examples include a treatment package that allows the use of oil as a coolant, oil-resistant hoses and the electrostatic extraction of fine particulates. An interface for a conventional or CO2 fire extinguishing system is also present. In addition, a digital camera is available to provide a clear view of the machining process.

DMG Mori developed the DMU 20 linear for easy automation 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.

GREENMODE hardware and software reduce energy consumption by over 10%, 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 model, tool rotation is superimposed with an additional ultrasonic oscillation, reducing the force generated by the tool during machining by up to 50%.