814 放物面鏡の加工について(ELID研削)(OS.1 生産加工・工作機械)

概要

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For Laman spectroscopy instrument, a newly fabrication process of deep paraboloidal mirror by combination of ELID-grinding and electro-forming techniques are trial. This experiment was carried out on the vertical machining center. The workpiece was fixed on rotary table that rotated around horizontal axis. Workpiece was ground by cast iron bonded diamond grinding wheel with mesh size #600, #2000, #4000 respectively. The #600 abrasive wheel is for rough grinding and #4000 one for finish grinding. No matter which grinding wheel was used, vibration occurred and thus there were many obvious wave marks caused by the vibration on the ground surface. The position of wave marks caused by different grinding wheel was same. The workpiece is too weighty and the stiffness of the rotary table spindle is relatively low by think. In order to get smooth surface the workpiece was polished. It took a lot of time to eliminate the wave marks. The shape accuracy of ground surface was reduced after the polishing process. In result a height form accuracy and good surface roughness paraboloidal mirror mold for electro-forming was fabricated
社団法人日本機械学会の論文
2001-03-09