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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 3, Issue 4 - Dec 1986
Volume 3, Issue 3 - Sep 1986
Volume 3, Issue 2 - Jun 1986
Volume 3, Issue 1 - Mar 1986
Selecting the target year
베어링 산업의 당면과제와 발전방향 
Jo, Gwan-Hyeon ;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 7~10
The study on the interactive approach for the system layout design of Fexible manuafcturing cell
Kim, Jang-Hyung ;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 16~27
The problems concerning FMC (Flexible manufacturing cell) system layout were treated in this paper. In fact, there being no clear definition about FMS (Flexible manufacturing system), it could be treated as the system adopting flexible-automation and FMS has been improving as a form of parts machining system. It was thought that the problems of combination of machine tool groups and parts family were important. Parts familly and machine tool groups were made up by means of multivariate analysis and the minimum trnsfer concept using correlation coefficient (
). And FMC system was layout by directional graph according to the FMS classifications.
Vibration Control of Flexible Robot Manipulator
Park, Young-Pil ; Ha, Young-Kyun ;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 28~38
An analytical and experimental investigation is made to the dynamic responese of a cantilever with a tip mass that models some of the basic phenomena involved in the response of a flexible manipulator with a tip mass on its free end under the given rotating motion. The system equation is derived from the Hamilton's principle on the basis of the Euler-Bernoulli hypothesis and an approximate solution is obtained from model analysis using Galerkin's method for the vibation response of the system subjected to a sudden stop after an impulsive rotation. Experiment was performed to verify the validity of the theoretical analysis. Results are given for the vibration amplitude of the free end with respect to tip mass ratio, non-dimensionalized rotating velocity, rotating angle and non- dimensionalized hub length. The rotating condition to minimize the vibration amplitude of the free end can be determined for the given basic paramenters.
A study on the shunt effect in resistance spot welding
Boo, Kwang-Seok ; Cho, Hyeong-Seok ;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 39~54
One of the important factors in practical welding situations is shunt effect which deteriorates weld quality due to a shunt current which flows in the exis- ting spot. Previously, this effect has not been analytically investigated, since the mechanism of shunt effect shows very complicated phenomena in the thermal and electrical behavior. In this paper this effect is extensively studied through theoretical and experimental analysis. The theoretical results obtained from a numerical analysis of the modelling of shunt effect are compared with experimental ones. Both results show good agreement and represent well the mechanism of shunt effect.
A Study on the grinding factor affecting the AE Source in surface grinding
Han, Eung-Kyo ; Kim, Ki-Choong ; Kim, Koung-Suk ; Kwon, Dong-Ho ;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 55~61
The study is concerned with the investigation of grinding factor affecting the AE Source by means of the relation between the amplitude level of AE signal and the depth of wheel engagement in surface grinding by AE method. As the result, work velocity was confirmed that the amplitude of AE signal had almost constant value in comparison with the depth of wheel engagement. But the depth of wheel engagement and the width of wheel engagement were proportional to the amplitude of AE signal. Therefore, when the AE Source was classified by 3-zone, Ws and Wf were affected by the depth of wheel engagement and that Wr was affected by the width of wheel engagement. Also, the adaptability of the AE method was studied about the detection of tool life of grinding wheel, sparkout and initial contact point.
An Experimental Study on the Machinability Influenced by Coated and Uncoated Tips, and Damping Device in Turning
Nam, Joon-Woo ;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 62~75
An experimental investigation of the machining characteristics such as cutt- ing resistance, surface roughness and tool wear in turning the test pieces of SM45C steel with both coated and uncoated carbide tool tips under various cutting conditions was conducted. Also a specially designed simple vibration damping device was experimentally evaluated for its effectiveness on machined surface roughness and a vibration test was conducted to confirm its ability to reduce the amplitude. Based on these tests finding, the following conclusions are made; 1. The cutting resistance(
) increases as the depth of cut(d) increases at fixed feed rate(f) over the cutting speed(v) range of 43-226 m/min and p decreses about 18% average when V is increased for fixed d and f. At V= 226m/min,
/for A, C tips are about the same level but
for B tip is 15% less than A, C tips. 2. The specific cutting resistance(Ks) at V=226 m/min was derived for A, B, C tips respectively and the value of Ks for B rip is about 20% less than A, C tips. 3. The surface roughness(Ra) improves significantly as the cutting speed(V) is increased and this effect was greater when V>100 m/min. On the other hand, Ra deteriorates as the feed rate(f) is increased and this trend was accelerated when f>0.3 mm/rev. With regard to the difference of Ra values among A, B, C tips, at V=226m/min, d=0.4mm, and f=0.31-0.61mm/rev, Ra values for B.C tips are about 17% less than tip A. 4. The experimental tool wear equations were derived for A, B, C tips and from these equations, the tool life(
) baced on the I.S.O. criteria was calculated to be
for both flank wear(
) and boundary wear(
). Hence, the coated tips are superior to the uncoated tip and tip C is considered to be the best. 5. The cutting resistance may be slightly reduced and the surface rounghness improved when the damper is used especially when V>100 m/min. Therefore this damping device is considered to be effective and practical. The experimental surface roughness equations were also derived. Based on the vibration test, it is established that the surface roughness improvement was the result of amplitude reduction made possible by the damper.
Computer Simulation for Analysis of Flexible Manufacturing Systems
Cho, Kyu-Kab ; Oh, Soo-Cheol ; Lee, Moon-Ok ;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 76~90
This paper discusses the analysis of flexible manufacturing systmes design using computer simulation method. The simulation language employed is SIMAN which is a powerful tool to model flexible manufacturing systems. The important characteristics of FMS, its design and operational problems, and structures based on the number of NC machine tools and their layout are discussed for the appli- cations of FMS to manufacturing. A new algorithm for forming part families and machine groups has been proposed and its software is also developed. Simulation procedure using SIMAN for analysis of FMS designs is discussed and two design problems are analyzed and evaluated to illustrate systemstic procedure for analysis of FMS.
A Study on Static and Dynamic Cutting Force in Drilling Process for Machining Center (1st report) -SM45C-
;M. Tsutsumi;Y. Ito;;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 91~101
This paper deals with the effect of static and dynamic cuttig force and the behaviour of drill life in drilling process. The experiments are performed with cemented carbide drills and high speed steel drills of 10mm in diameter and in an annealed SM45C. The conclusions are as follows (1) Dynamic cutting force is varied with the dept of hole. (2) Dynamic cutting forces of torque and thrust are increase with the increase in feed and cutting speed. (3) Chipping influence the dynamic cutting force of thrust than torque, and in the case of thrust, the amplitude is 3-7 times large than ordinary cutting state. (4) Prediction of drill life can be obtained from more easily the amplitude of static cutting force than that of dynamic cutting force.
Characteristic anc Applications of Laser Welding 
Na, Deok-Ju ;
Journal of the Korean Society for Precision Engineering, volume 3, issue 2, 1986, Pages 102~104