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May, 2019
Consistent and Modular Micromachining with Zorn’s Micro one™
By Martin Zeiher, CEO, Zorn microsolution GmbH
design, systems can be configured to meet particu- lar requirements without an extreme increase in cost. Zorn’s expertise in handling miniature com- ponents led to the development of the Micro one, a precision CNC machining system. The engineering firm’s deep knowledge of special-purpose microassembly machines played a key role in the design of the new system. Working in association with specialists from
M
the machine tool sector, the company created a modular, highly flexible miniature machine tool.
icromachining systems are often required to meet an extensive range of specifica- tions. However, with a more modular
The development objectives were to create a high- quality, ergonomic machine capable of handling small parts, make it use resources efficiently and take up a minimal amount of space.
Supply and Machining Modules The designers were given free rein when
designing the new system, without the kinds of requirements of conventional machine tools. This process resulted in a micromachining center with a modular structure for maximum flexibility. The system can be split into two units, which
can be positioned separately. The supply module functions as a base, accommodating the switch
cabinet, controller, pneumatic system, cooling unit, and a minimal-quantity lubrication system, while the machining module is the active element. Placed one on top of the other, the Micro one fits into a space of only 9.7 ft2 (0.9m2). If the two modules are separated, they can be
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Micro one, a modular CNC micromachining system.
Even the most compact of mach - KIC RPI i4.0
ines needs a solid base. By combining a high level of mechanical and thermal stability, natural granite offers a solid foundation for the Micro one. The sys- tem’s direct drives, supplied by Heidenhain, use ultra-precise glass scales to guarantee dynamics and pre- cision. As is the case for the high-fre- quency spindles, the drives are water- cooled to ensure stable temperatures within a single degree. Another special feature of the
Consistent quality Reduced production cost
Improved productivity Connected reflow process
machine is its tool changer. The tools, which are engaged directly in the spindle using collet chucks, are stored in a tool changer on the main axis. One linear unit can accommo- date 12 tools, which are located directly next to the worktable. This provides exceptionally short tool changeover times — down to three seconds. Each tool is gauged on the worktable using a Z-Pico tool length measurement system from Blum Novotest, before being inserted. The tool fixtures can be exchanged for a quick-change system, enabling quick access to a wider range of tools. A fire extinguisher and extraction system are also available as options.
Environmental Impact Another crucial aspect for Zorn
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was to develop a machine with the best possible environmental foot- print. In addition to occupying mini- mal floorspace, the Micro one also reduces energy consumption. It does this by setting less mass in motion overall and the direct drives, as well as the high-frequency spindles, gen- erate little noise. The integrated minimum-quanti-
ty lubrication system rounds out the machine, reducing chemical require- ments and ensuring efficient cooling
Continued on next page
arranged to form a manual seated workstation. The machining module can also be integrated into other setups, as well. The high-frequency spindle allows a controlled speed of up to 75,000 rpm, enabling signif- icant cutting speeds. The high speed and feed rate are excellent for machining a wide range of materi- als, including hardened steels. Access to the workpiece is a critical factor for both microassembly and microma- chining. The work area of the Micro one offers access in both the x and y axes. The raised work level places the z axis in an excellent position for workpiece access.
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