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梁均懿,남궁석 충남대학교 공업교육연구소 1980 論文集 Vol.3 No.2
The cutting resistance of grooved and non-grooved workpieces and the tool life under various cutting conditions was investigated experimentally with the use of a tool dynamometer. The results of this experiment are as follows : 1) The cutting force (principal and feed forces) increases with increasing depth of cut due to the force of the impact (force) between tool and workpiece in interrupted cutting. 2) The tool life of a P 20 cutting tool reduces with increasing feed cutting speed, and number of grooves. 3) The life of a P 20 tool is exceedingly short by comparision to the tool life of a H.S.S. tool in proportion to the increase of number of grooves.
NC 가공을 위한 Ferguson 곡면의 오차 해석에 관한 연구
梁均懿,張鐘聲 全北大學校 1990 論文集 Vol.32 No.-
Sculputured surface are widely found in car body, ship hull and air plane parts. This paper covers computer-aided design of soulptured(or free-form) surface ; surface interpolation methods ; methods of generating CL-data for the machining of 3-D sculptured surface. The purpose of this paper is aimed to express how much we could show the real surface accurately comparing with the Ferguson surface used so many times, which is abtained from the 3-D point data through engineering calculation.
다구찌 실험 계획법을 이용한 고속가공에서 공구수명 조건의 최적화
양균의,임표 한국기계가공학회 2006 한국기계가공학회지 Vol.5 No.4
High Speed Machining(HSM) reduces machining time and improves surface accuracy because of the high cutting speed and feedrate. Development of HSM makes it allowable to machine difficult-to-cut material and use small-size-endmill. It is however limited to cutting condition and tool material. In the machining operation, it is important to check main parameter of tool life and select optimal cutting condition because tool breakage can interrupt progression of operation. In this study, cutting parameters are determined to 3 factors and 3 levels which are a spindle speed, a feedrate and a width of cut. Experiment is designed to orthogonal array table for L9 with 3 outer array using Taguchi method. Also, it is proposed to inspect significance of the optimal factors and levels by ANOVA using average of SN ratio for tool life. Finally, estimated value of SN ratio in the optimal cutting condition is compared with measured one in the floor shop and reduction of loss is predicted.
梁均懿 전북대학교 공업기술연구소 1983 工學硏究 Vol.13 No.-
The chip produced in course of machining usually exihibit a finite radius of curvature. The curling is performed without regard to the buile-up edge process of tool. Though a part of this may be due to the bending moment of the chip, the irregular deformation in cutting mechanism and the second folw on the rake face. But I've studied experimentally on how the cutting conditions effect the curling. I varied the rake angle from minus 50˚to the plus 50˚ by dividing them into 10 degrees of the difference, in addition, it was observed that the rake angle is related to tool-chip contact length. But tool with the minus angle did not make the curling chip, but small dust like chip. The experiment was made for the only plus rake angles and the results are as follows: 1. The chip curl radius was longer as the depth of cut, rake angle, the cutting speed and feed increase. 2. The longer the chip curl radius was, the more chip volume we have. 3. The tool-chip contact length decreased with increasing rake angle.