According to the company, LED molds for IT industries are one of the most demanding micro milling applications. Moldmakers must achieve surface roughness to Ra 20 nm.
Small precision mold base
The YASDA RT10 tilting rotary table helps to finish hardened punch dies in one chucking with high 5-axis milling accuracy.
Methods Machine Tools, Inc. has announced the YASDA YMC 430 Ver. II, a new Micro Machining Center designed for the ultra-precise manufacturing and high surface finishes required on small, complex features in components and dies/molds in industries such as medical and semi-conductor. Linear motor-driven controlled axes and a rigid machine structure offer enhanced speed, precision and surface quality during machining. Linear positioning and circularity accuracy of less than one micron (according to ISO 230-2 1997) is achieved. The YASDA Micro Center YMC 430 Ver. II has a high-speed 40,000 RPM spindle and is available with 3-axis or 5-axis capabilities.
The YMC 430 X-Y table has linear guideways and a linear motor drive, enabling precise machining and improved vibration dampening. Linear motor drives include optical scales that support and sustain submicron milling performance.
In the optional 5-axis micro milling capability, the YMC 430 is equipped with a direct drive motor-driven, high-precision tilting rotary table. This combination provides multi-face indexing and machining as well as simultaneous 5-axis machining without re-chucking. Applying the direct drive motor to a tilted and rotary axis creates backlash-free, high-speed, high-precision positioning.
The YASDA Micro Center YMC 430 Ver. II has XYZ travels of 16.5" x 11.8" x 9.8" (420 mm x 300 mm x 250 mm). The table work surface measures 23.6" x 13.8" (600 mm x 350 mm). An automatic tool changer holds 32 tools and is available in a 90-tool, large-capacity configuration. The FANUC 31i-Model B5 control is furnished standard. To view a video, go to http://www.youtube.com/watch?v=YNfvsjegEh4&feature=youtu.be.</p>
YASDA Micro Milling Center YMC 430 Ver. II Application Examples
1. LED molds: According to the company, LED molds for IT industries are one of the most demanding micro milling applications. Moldmakers must achieve surface roughness to Ra 20 nm. In one example, each die block is made of more than 300 cavities and machining time takes over 60 hours. The YMC 430 mills for this long cycle time to produce high quality surface finishing on LED molds.
2. Lamp mold: Mold for plastic lens requires an approximate Ra of 50 nm on STAVAX equivalent steel. Its form is larger than the LED mold and also requires rough milling capability against hardened steel. YMC 430 demonstrated its versatile milling capacity by providing stable machining and high finish accuracy.
In a lens mold, or in plastic injection molding for medical purposes, mold base accuracies are extremely tight. In one example, pitch accuracy of the holes within 1 ╡m is required. Depending on the depth of the holes on the base plate where square end mills are required, the YMC 430 achieves dimensional accuracy within 1 ╡m, equivalent to a jig grinding and boring process.
3. Punches-hardened steel/cemented carbide: The YASDA RT10 tilting rotary table helps to finish hardened punch dies in one chucking with high 5-axis milling accuracy. By tilting the workpieces and synchronizing the tilting/rotations with linear motions without any backlash, it is possible to use shorter lengths of cutters to enable cutting rigidity and to help machine tiny corners and complicated forms on the dies. Using diamond cutters, it is possible to mill and finish small cemented carbide dies and molds.
For more information contact:
Steve Previti
Methods Machine Tools, Inc.
65 Union Avenue
Sudbury, MA 01776
978-443-5388
877-MMT-4CNC (877-668-4262)
sales@methodsmachine.com
www.methodsmachine.com