Journal of Powder Materials

Machining Characteristics of Micro Structure using Single-Crystal Diamond Tool on Cu-plated Mold: Chang-Eui Kim, Eun-chae Jeon, Tae-Jin Je, Myung Chang Kang; J Korean Powder Metall Inst. 2015;22(3):169-174. Published online June 1, 2015; DOI: https://doi.org/10.4150/KPMI.2015.22.3.169

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The optical film for light luminance improvement of back light unit that is used in light emitting diode/liquid crystal display and retro-reflective film is used as luminous sign consist of square and triangular pyramid structure pattern based on V-shape micro prism pattern. In this study, we analyzed machining characteristics of Cu-plated flat mold by shaping with diamond tool. First, cutting conditions were optimized as V-groove machining for the experiment of micro prism structure mold machining with prism pattern shape, cutting force and roughness. Second, the micro prism structure such as square and triangular pyramid pattern were machined by cross machining method with optimizing cutting conditions. Variation of Burr and chip shape were discussed by material properties and machining method.

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Investigation of ultra-precision planing process to fabricate high luminance retroreflector based on cutting force and tool vibration analysis
Ji-Young Jeong, Jun Sae Han, Chung-Mo Kang, Eun-Ji Gwak, Doo-Sun Choi, Tae-Jin Je
Scientific Reports.2022;[Epub] CrossRef
Precision Cutting of the Molds of an Optical Functional Texture Film with a Triangular Pyramid Texture
Huang Li, Zhilong Xu, Jun Pi, Fei Zhou
Micromachines.2020; 11(3): 248. CrossRef

Comparison of Micro Trench Machining Characteristics with Nonferrous Metal and Polymer using Single Diamond Cutting Tool: Hwan-Jin Choi, Eun-Chae Jeon, Doo-Sun Choi, Tae-Jin Je, Myung-Chang Kang; J Korean Powder Metall Inst. 2013;20(5):355-358.; DOI: https://doi.org/10.4150/KPMI.2013.20.5.355

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Abstract PDF: Micro trench structures are applied in gratings, security films, wave guides, and micro fluidics. These micro trench structures have commonly been fabricated by micro electro mechanical system (MEMS) process. However, if the micro trench structures are machined using a diamond tool on large area plate, the resulting process is the most effective manufacturing method for products with high quality surfaces and outstanding optical characteristics. A nonferrous metal has been used as a workpiece; recently, and hybrid materials, including polymer materials, have been applied to mold for display fields. Thus, the machining characteristics of polymer materials should be analyzed. In this study, machining characteristics were compared between nonferrous metals and polymer materials using single crystal diamond (SCD) tools; the use of such materials is increasing in machining applications. The experiment was conducted using a square type diamond tool and a shaper machine tool with cutting depths of 2, 4, 6 and 10 µm and a cutting speed of 200 mm/s. The machined surfaces, chip, and cutting force were compared through the experiment.

Comparison of Machinability Between PCD Tool and SCD Tool for Large Area Mirror Surface Machining Using Multi-tool by Planer: Chang-Eui Kim, Hwan-Jin Choi, Eun-Chae Jeon, Tae-Jin Je, Myung-Chang Kang; J Korean Powder Metall Inst. 2013;20(4):297-301.; DOI: https://doi.org/10.4150/KPMI.2013.20.4.297

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Mirror surface machining for large area flattening in the display field has a problem such as a tool wear and a increase in machining time due to large area machining. It should be studied to decrease machining time and tool wear. In this paper, multi-tool machining method using a PCD tool and a SCD tool was applied in order to decrease machining time and tool wear. Machining characteristics (cutting force, machined surface and surface roughness) of PCD tool and SCD tool were evaluated in order to apply PCD tool to flattening machining. Based on basic experiments, the PCD/SCD multi-tool method and the SCD single-tool method were compared through surface roughness and machining time for appllying large area mold machining.

Citations

Citations to this article as recorded by

Machining Characteristics of Micro Structure using Single-Crystal Diamond Tool on Cu-plated Mold
Chang-Eui Kim, Eun-chae Jeon, Tae-Jin Je, Myung Chang Kang
Journal of Korean Powder Metallurgy Institute.2015; 22(3): 169. CrossRef
Analysis Of Drilling Of A Metal Plate With Pilot Hole
K.S. Kim
Archives of Metallurgy and Materials.2015; 60(2): 1307. CrossRef

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