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http://dx.doi.org/10.7736/KSPE.2013.30.12.1303

An Ultra-precision Lathe for Large-area Micro-structured Roll Molds  

Oh, Jeong Seok (Advanced Manufacturing Systems Research Division, Korea Institute of Machinery & Materials)
Song, Chang Kyu (Advanced Manufacturing Systems Research Division, Korea Institute of Machinery & Materials)
Hwang, Jooho (Advanced Manufacturing Systems Research Division, Korea Institute of Machinery & Materials)
Shim, Jong Youp (Advanced Manufacturing Systems Research Division, Korea Institute of Machinery & Materials)
Park, Chun Hong (Advanced Manufacturing Systems Research Division, Korea Institute of Machinery & Materials)
Publication Information
Journal of the Korean Society for Precision Engineering / v.30, no.12, 2013 , pp. 1303-1312 More about this Journal
Abstract
We report an ultra-precision lathe designed to machine micron-scale features on a large-area roll mold. The lathe can machine rolls up to 600 mm in diameter and 2,500 mm in length. All axes use hydrostatic oil bearings to exploit the high-precision, stiffness, and damping characteristics. The headstock spindle and rotary tooling table are driven by frameless direct drive motors, while coreless linear motors are used for the two linear axes. Finite element method modeling reveals that the effects of structural deformation on the machining accuracy are less than $1{\mu}m$. The results of thermal testing show that the maximum temperature rise at the spindle outer surface is approximately $0.5^{\circ}C$. Finally, performance evaluations of the error motion, micro-positioning capability, and fine-pitch machining demonstrate that the lathe is capable of producing optical-quality surfaces with micron-scale patterns with feature sizes as small as $20{\mu}m$ on a large-area roll mold.
Keywords
Hydrostatic oil bearings; Optical Films; Single-point Diamond Cutting; Ultra-precision Roll Lathe;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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