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고해주(Hai-Ju Ko),정윤교(Yoon-Gyo Jung) 한국기계가공학회 2007 한국기계가공학회지 Vol.6 No.4
In the recent years, development of machine tool with high speed feeding system have brought a rapid increase in productivity. Practically, thermal deformation problem due to high speed is, however, become a large obstacle to realize high precision machining. In this study, therefore, the construction of automatic error compensation system to control thermal deformation in high speed feeding system with real time is proposed. To attain this purpose, high speed feeding system with feeding speed 60㎜/min is developed and experimental equation for relationship between thermal deformation and temperature of ball screw shaft using multiple regression analysis is established. Furthermore, in order to analyze thermal deformation error, compensation coefficient is determined and thermal deformation experiments is carried out. From obtained results, it is confirmed that automatic error compensation system constructed in this study is able to control thermal deformation error within 15~20 ㎛.
고해주(Hai-Ju Ko),정윤교(Yoon-Gyo Jung) 한국기계가공학회 2007 한국기계가공학회지 Vol.6 No.3
Recently, the machine tools called multi-task machines, which mounted rotary axes on the table or spindle are used increasingly. Accordingly, multi-task machine tool takes a growing interest on the motion accuracy of feed drive system. In this study, measurement and diagnosis of motion errors ware attempted from circular pattern obtained by using DBB (Double ball bar) device. Those were obtained at both clockwise and counter clockwise motions in mutually perpendicularly intersecting three planes. The reliability of error measurement system for multi-task machine tool was verified by the direct test cutting.
고해주(Hai-Ju Ko),황종대(Joung-Dae Hwang),정윤교(Yoon-Gyo Jung),김재실(Chae-sil Kim) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
The improvement of the productivity and quality of products were caused by adaptation of machine tool in the industry. Also, it is connected with development of products with multi function and high price, so it leads to industrial growth in the field of machine tool. For high speed of the machine tool, the feeding system is an important function, and technical advance of this feeding system is derived the development of 5 axis machine tool mounted high and multi axis feeding system. Moreover, PKMT(Parallel Kinematic Machine Tool) using robot technology with 5 axis function is developed, and it is becoming the advanced machine tool which space motion is very convenient. But low motion accuracy by multi axis movement in PKMT is a serious problem. So, the development of measurement system for the evaluation of motion accuracy is required. In this study, we are purpose to propose the measurement method about the high speed and multi axis feeding system of machine tool, and to obtain reliability for measuring result.
고해주(Hai-Ju Ko),김태한(Tae-Han Kim),정윤교(Yoon-Gyo Jung) 한국기계가공학회 2007 한국기계가공학회 춘추계학술대회 논문집 Vol.2007 No.-
Recently, the machine tools called multi-task machines, which have some rotary axes on the table or spindle are used increasingly. Accordingly, it takes a growing interest on the motion accuracy of these machines. In this study, measurement and diagnosis of motion errors ware attempted from circular pattern obtained by using DBB (Double ball bar) system. Those were obtained at both clockwise and counter clockwise motions in mutually perpendicularly intersecting three planes. The reliability of an error measurement system for multi-task machine tool was verified by the direct test cutting.
DBB를 이용한 3축 공작기계의 운동정밀도 측정 및 오차분석
김태한(Tae-han Kim),정윤교(Youn-gyo Jung),고해주(Hai-ju Ko) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
In present, the DBB(Double ball bar) measurement system which measure the motion error of multi-axis Machinine Too1s was in the limelight of machine tools industary. This DBB measurement system was more easier to using and more complexible to apply than the other Measure system(Grid encoder, Laser measurement system, Direct test). DBB measurement system will be secured reliability by The direct cutting test which is tested by machining the workpiece.
DBB를 이용한 3축 공작기계의 운동정밀도 측정 및 오차분석
김태한(Tae-han Kim),정윤교(Youn-gyo Jung),고해주(Hai-ju Ko) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.10
In present, the DBB(Double ball bar) measurement system which measure the motion error of multi-axis Machinine Too1s was in the limelight of machine tools industary. This DBB measurement system was more easier to using and more complexible to apply than the other Measure system(Grid encoder, Laser measurement system, Direct test). DBB measurement system will be secured reliability by The direct cutting test which is tested by machining the workpiece.