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엔드밀을 이용한 곡면모델 CNC 절삭경로의 가공성능 향상
맹희영(Heeyoung Maeng),서창길(Changgil Suh) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
The characteristics of terrace volume of rough cutting are analysed in order to investigate the variation of cutting force and cutting area formation. The cutting forces are analysed by comparing the result of numerical analysis on the measurement of cutting force and theoretical prediction of cutting area formation and specific cutting volume. Terrace volume workpieces are manufactured with 19 different shapes according to the variation of terrace volume factor, tool diameter factor, and cutting depth factor. Each workpiece is machined by CNC machining center with flat end mill along the round surface of terrace volume. The variation of cutting force is measured by dynamometer. It is verified that theoretical prediction of cutting area formation is correspond to practically measured cutting force and the cutting force valued by numerical analysis. The value of terrace volume after rough cutting shall be utilized as adaptive controlled data for variable feed which makes possible to control the cutting force within a specific value at the processing of terrace volume.
맹희영(Heeyoung Maeng),백은표(Eunpyo Baek),유준상(Jun-sang Yoo) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
The new grinding mechanism is developed in this paper so as to machine the BioMTA compacters, which is used for inserting the dental clinic paste into a small size hole. The optimum grinding parameters are determined by investing the machined state of test samples, such as helix angle, tilting angle, depth of groove, and wheel geometries. Also, the compaction effect of test sample are evaluated by comparing these samples with commercial brand samples. So. it is proved that this mechanism is adequate for the grinding of spirally tapered workpieces.
Polishing Characteristics of Machined Surface by Ball End Milling
맹희영(Heeyoung Maeng),백은표(Eunpyo Baek) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
The experimental polishing characteristics of machined surface after ball end milling are studied quantitatively to investigate the optimum machining conditions(i.e. crossfeed and cutter size in ball end milling) which minimize the total machining time including polishing and milling process. The polishing efficiency is investigated during the polishing experiment, and then eventually polishing time is evaluated for various kinds of conditions, and it is finally analyzed the total machining time which is estimated by adding the milling time to the polishing time of corresponding testpieces.
Polishing Characteristics of Cusp Volume Left After Ball End Milling
맹희영(Heeyoung Maeng),김명수(Myoungsoo Kim) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
The polishing characteristics of machined surface after ball end milling are studied in this paper quantitatively to investigate the optimum machining conditions(i.e. crossfeed and cutter size in ball end milling) which minimize the total machining time including polishing and milling process. The polishing experiments are formulated into the incremental changing task of sand paper meshes bounded by the allowable limit roughness for each abrasive grit size. Testpieces are prepared by milling the flat steel block to have the terraced surface for the different milling crossfeed and cutter size, and the polishing devices is installed on a grinding machine table, which simulates the actual polishing work as specified stroke and acting pressure. The polishing efficiency is investigated during the polishing experiment, and then eventually polishing time is evaluated for various kinds of conditions, and it is finally analyzed the total machining time which is estimated by adding the milling time to the polishing time of corresponding testpieces.