5-axis simultaneous machine

The DMU 20 linear and the ULTRASONIC 20 linear 3rd Generation 5-axis simultaneous machining center specialize in ultrasonic-supported milling and grinding of advanced materials such as glass, ceramics, and demanding composite materials. The ultrasonic superimposition of the tool rotation with amplitudes up to 15µm reduces process forces by 50% and enables higher feed rates, improved surface finishes, and longer tool life.

Thermo-symmetrical gantry design with stable cast bed

The basis for the high precision is the FEM-optimized machine bed made of EN-GJS 600 cast iron. It ensures 15% greater rigidity compared to the previous generation and is constructed like a measuring machine in a gantry design. This ensures long-term stability, so the machines achieve reproducible machining results. Thermo-symmetrical design enables optimum regulation of temperature-related fluctuations. Cooling the bed, linear drives, and direct position measuring systems from magneSCALE in all axes also contributes to the high accuracy.

100% linear technology for maximum accuracy and dynamics

Torque motors in the NC swivel rotary table and linear drives from Siemens in the X-, Y-, and Z-axis – their guides are 30mm wide – make the DMU 20 linear 3rd Generation a fully linear machine. The wear-free direct drives guarantee the best possible positioning and repeat accuracy and work without backlash. The DMU 20 linear already achieves first-class surface qualities. The ULTRASONIC model guarantees these qualities in hard, brittle advanced materials. Direct drives give the machining process maximum dynamics and accelerations of more than 2g. The machine achieves feed speeds up to 60m/min.

Spindles for every application

The wheel magazine of the DMU 20 linear 3rd Generation offers space for 26 tools for a high level of machining versatility, while an optional chain magazine has 60 tools. The maximum tool size is 70mm dia. x 200mm in length and the weight is 1kg. An optimized tool flap with chip flushing minimizes the risk of contamination in the changer. Being able to use even small tools at optimum cutting speeds, the DMU 20 linear 3rd Generation has a spindle with 42,000rpm. The spindle has an ULTRASONIC actuator enabling ultrasonic-supported grinding as well as oil-air lubrication. A permanently grease-lubricated spindle is available for machining sensitive components that can’t be contaminated with oil or emulsion.

Large and clearly laid out workspace

The increased travel of the compact DMU 20 linear – only requiring a footprint of 3.8m² – is 220mm x 370mm x 290mm, meaning the Y-axis has increased by 80% compared to the previous model due to the larger swivel range of +130° to -93°. The axis can be swiveled in the direction of the operator, offering a better view of the table and more flexibility. Components with a diameter of 220mm and a height of 283mm can be machined.

Ultrasonic-assisted machining, process integration, automation solutions

The C-axis is available with 1,500rpm, so the machine can perform cylindrical grinding operations. The Schunk NSA 120 clamping system is offered exclusively with this option. With the ULTRASONIC AxialGrinding technology cycle, any 3D geometries based on rotationally symmetrical blanks can be programmed. The process integration is supplemented by in-process measurement and laser tool measurement. Automation solutions such as the PH 10 and PH 50 pallet handling systems or robot-assisted systems such as the MATRIS Light ensure additional productivity in unmanned shifts.

DMG MORI increases process reliability in automated production with reliable coolant and chip management. The optional 200L zeroSludge coolant tank with the box filter chip conveyor ensures consistent disposal of fine chips and sludge. The internal protection is reinforced with stainless steel and ceramic-coated internal covers to prevent chip accumulation. The zeroFOG oil mist separation system keeps the working environment clean and is easy to maintain.

DMG MORI USA
https://us.dmgmori.com