Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society for Precision Engineering
Journal Basic Information
Journal DOI :
Korean Society of Precision Engineering
Editor in Chief :
Volume & Issues
Volume 12, Issue 12 - Dec 1995
Volume 12, Issue 11 - Nov 1995
Volume 12, Issue 10 - Oct 1995
Volume 12, Issue 9 - Sep 1995
Volume 12, Issue 8 - Aug 1995
Volume 12, Issue 7 - Jul 1995
Volume 12, Issue 6 - Jun 1995
Volume 12, Issue 5 - May 1995
Volume 12, Issue 4 - Apr 1995
Volume 12, Issue 3 - Mar 1995
Volume 12, Issue 2 - Feb 1995
Volume 12, Issue 1 - Jan 1995
Selecting the target year
Noncontact Type Three Dimensional Profile Measurement for CAD Modeling of Sculptured Surface
Park, H.G. ; Park, Y.B. ; Kim, S.W. ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 5~14
An optical measurement method of three dimensional surface profiles which is named the slit beam projection is suggested and practically implemented. This method is intended especially for noncontact and fast digitization of sculptured surfaces for CAD modeling and die manufacturing. Its basic principles are based on geometric optics. Deatiled optical principles and an sub-pixel image processing technique to enhance the measuring resolutions are described in this study. The measuring performances of the slit beam projection are presented and discussed to demonstrate that an actual measuring accuracy of below .+-. 0.2mm can be achived over the whole measuring range(500mm*300mm*200mm)
Monitoring of Chatter Vibration by Laser Displacement Signal
Lee, S.Y. ; E.S. Chung ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 15~21
Automatic monitoring of cutting process is one of the most important technologies for increasing the stability and the reliability of unmanned manufacturing system. In this study, the methods which use laser displacement signals and banded energy method are proposed to monitor chatter vibration in the turning process. From this method, the monitoring system of the chatter vibration was developed and investigated its practical possibility. As a result, it is shown by experiments that the chatter vibration can be detected accurately, and it can be widely used in most turning processes.
A study on the Development of Micro Hole Drilling Machine and its Mechanism
I.H. Paik ; W.S. Chung ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 22~28
Micro Drills have found ever wider application. However micro drilling is a machining to integrate the difficult machinablities such as tool stiffness, position control and revolution accuracy, and is known to cost and time consuming. So, this study aimed to practice ultraminiature drilling(0.05 .phi. ) wiht simple component, if possible. System is developed as the three modules : feed drives, spindle and monitoring part. The dynamics of measured current signals from the spindle of Micro Hole Drilling machine are investigated to establish the criteria of stepfeed mechanism. Cutting experiments identify the relationship of spindle rpm, feed rate and tool life. The smaller drill diameter is, the more suitable cutting condition have to be selected because of chip packing.
Methodology of tool analysis to improve the accuracy of cold forged parts
Kim, T.H. ; Kim, B.M. ; Park, J.C. ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 29~37
In many metal forming processes, it is common to use stress rings for reducing elastic deformation and failures of forming dies. But, shrink fit of dies inner diameter of die insert, machining is reuqired after shrink fit processes. The reduction of inner diameter can be predicted by the analysis of elastic-plastic finite element method. The dimension of dies before shrink fit can be determined to minimize or remove machining after shrink fit processes by deformation analysis of die. The computation of contacting stresses along die surface was analyzied by rigid plasitic finite element method, and data were interpolated by the contact search algorithm. In this paper, we propose the analysis method of forging dies after shrink fit and forming to improve dimensional accuracy of final products.
Path Generation of Mobile Robots Using Clothoid Curves
D.H. Shin ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 38~47
Knowledge Acquisition and Design for the Grinding Trouble Knowledge-Base
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 48~57
A Heuristic Based Navigation Algorithm for Autonomous Guided Vehicle
Y.Y. Cha ; D.G. Gweon ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 58~67
A path planning algorithm using a laser range finder are presented for real-tiem navigation of an autonomous guided vehicle. Considering that the laser range finder has the excellent resolution with respect to angular and distance measurements, a sophisticated local path planning algorithm is achieved by using the human's heuristic method. In the case of which the man knows not rhe path, but the goal direction, the man forwards to the goal direction, avoids obstacle if it appears, and selects the best pathway when there are multi-passable ways between objects. These heuristic principles are applied to the path decision of autonomous guided vehicle such as forward open, side open and no way. Also, the effectiveness of the established path planning algorithm is estimated by computer simulation in complex environment.
Two-Dimensional Analysis of Pressure Distribute by Underwater Electric Discharge
Kim, Y.S. ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 68~77
The two-dimensional pressure distribution, which is the most important parameter in the casting cleaning installations(CCI), was analyzed using the K-FIX computer program for two-phase flow. Modelling was done using R-Z coordinates for the initial and boundary conditions which don't have periodic influx and efflux, and also there was the electric discharge due to high pressure and temperature. The marked particles were introduced to prodict the structure and the size of main and local moving surfaces. The initial and boundary conditions were modified due to the internal structure of CCI.From the results of numerical analysis, it was shown that the maximum pressure on casting was increased with the increase of a water level. The pressure on casting in the radial direction was higher than that in axial direction. Also, it was proved that by introducing the marked particles it was possible to predict the surface structure in case of two-phase flow.
Control of Seeker Scan-Loop using LSDP
Lee, H.P. ; C.S. Song ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 78~86
Controller of seeker scan-loop is designed using LSDP proposed by McFarlane. The performance and robustness of
controller are analyzed using robustness theorems by Lehtomaki and compared with those of the LQG/LTR controller. Especially, structured singular value .mu. -test of Doyle is used to evaluate robust performance of seeker scan-loop. It is demonstated that seeker scan-loop by
controller is very robust to model uncertainties described by additive and multiplicative perturbations.
Development of Drilling Center Column made of Epoxy-granite Material and Experimental Study on it's Structural Characteristics
Won, S.T. ; Kim, J.H. ; Lee, H.W. ; Maeng, H.Y. ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 87~96
A new fungivle material named Epoxy-Granite composite is applied to the column structure of drilling center in order to investigate the advanced dynamic charateristics comparing with a conventional cast iron material. The dimensions of new column structure are adjusted to keep the same stiffness (EI value) and the manufacturing conditions are formulated based on the preceeding research experience about the development of Epoxy-Granite structural material. The two kinds of experiments are set up, one of which is for the measurement of natural mode and frequency using experimental modal analysis, and the other one is for the measurement of vibration amplitude during idling operation of a machine tool. The comparison of maximum accelerance values at each natural frequency of bending mode shows a Epoxy-Granite column have larger modal damping ratios(over 2times) than a cast iron column. The vibration amplitude of Epoxy-Granite column measrued on the bed, motor base, and top of column are also much smaller (up to 12%) than the case of cast iron column. It is therefore confirmed that a Epoxy-Granite material exhibits a good anti- vibrational propderty even if it is used under the actual operational environments of machine tool as a practical structural element.
A Study on Position and Force Control of A Robot Manipulator with Artificial Rubber Muscle
S.H. Jin ; K. Watanabe ; Lee, S.G. ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 97~103
This paper describes position and force hybrid control for a robot manipulator with artificial rubber muscle actuators. The controller using two control laws such as PID control and fuzzy logic control methods is designed. This paper concludes to show the effectiveness of the proposed controller by some experiments for a two-link manipulator.
Dynamic analysis on belt-drive system of machine tools
Kim, S.G. ; Lee, S.Y. ; Lee, J.M. ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 104~111
The needs of ultraprecision machine tools, which manufacture and machine the high precision parts used in computers, semiconductors and othe rprecise machines, have been increased recentrly. So it is important to design the driving parts of the ultraprecision machine tools which affect significantly on the performance of them. In this paper, the dynamic analyses on the belt-drive system were studied. The correlational equations between the acoustic natural frequency and the tension of belt were derived by experiments. The dynamic delections while the dynamic loads on the motor system changed were analyzed by the finite element analysis. The nonlinear characteristics of the bearings on the dynamic performance was studied and the belt connecting the motor to the spindle of a machine tool was modeled by the truss element and the beam element.
Experimental Analysis of Chatter Vibration and Acoustic Emission of Cutting Tool
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 112~122
Chaotic Response and Stability Analysis for Multi-input Nonlinear Systems
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 123~131
Choice of Turning Devices for Robotic Assembly based on Separability and Instability
C.K. Shin ; H.S. Cho ;
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 132~141
This paper presents a choosing method of turning devices for stable robotic assembly based on verification of a base assembly motion instability. In flexible assembly application, the base assembly needs to be maintained in its assembled state without being taken apart. Therefore, the instability of the base assembly motion should be considered when determining the guide line of choosing turning devices by evaluating a degree of the motion instability of the base assembly. To derive the instability, first we inference collision free assembly directions by extracting separable directions for the mating parts and calculate the separability which gives informations as to how the parts can be essily separated. Using these results, we determine the instability evaluated by summing all the modified separabilites of each component part within base assembly.
Numerical Simulation of Self-Compensating Dynamic Balancer in a Rotating Mechanism
Journal of the Korean Society for Precision Engineering, volume 12, issue 1, 1995, Pages 142~151