슈퍼커패시터 양산화를 위한 하이브리드 복합금형 개발

권혁홍 한국기계가공학회 2015 한국기계가공학회지 Vol.14 No.1

In this study, a high-speed procedure to be used in composite molding technology is developed for the production of a hybrid supercapacitor in a progressive and revolutionary current in a production system, as are the related operating conditions. Mold parts with solid modeling, the ease of programming of future mold product designs, tolerance management, and pre-explode tests by the building of a progressive die design system using Cimatron_E10 Die Design Software for the strip layout are done. The capacity of the super-hybrid composite mold design will save time and money through its verification of the manufacture of molds. We plan to apply this to future related products for production cost savings of more than 30% achieved by considering the components of the production costs, labor, and material costs of production as compared to conventional production methods.

인텀샤프트 일체형 유니버셜 파이프 조인트용 다단조금형의 단조공정해석

권혁홍,문관진,송승은,Kwon, Hyuk-Hong,Moon, Kwan-Jin,Song, Seung-Eun 한국생산제조학회 2010 한국생산제조학회지 Vol.25 No.3

This study was aimed at the design of the dies for the unified pipe joint of the intermediate shaft using the computer simulation to shorten the period of production, on the basis of the process planning which was designed by the field experts. In the computer simulation, 'Deform-3d' and 'eesy-DieOpt' have been used, which are the commercial process analysis and die design program. Through the process analysis, we could know the propriety of the forming process, the inner pressure of the die and the suitable fitting pressure between the insert and the sleeve which was not showing any positive tangential stresses in the insert. Through the simulation of die design, we could know the number of the stress ring, the diameter ratios, the stresses of the die, the shrink fitting tolerance and temperature in the condition of the already determined maximum outer die diameter of the multi-stage former. The validity of the die design using the computer simulation was analyzed by the experiments and the results were satisfactory. As the results of this study, the new and easy die design system for multi-forging has been developed.

디텐트 스프링 교정방법의 적용성 평가

권혁홍 대진대학교 신과학연구소 1998 신과학연구 Vol.1 No.-

A sheet spring such as detent is widely used in machine elements because it is easy to produced in mass with low cost. Since it has several complicated production processes, inspection and correction for spring force is needed after production. To construct automatic spring force correction system, applied force for plastic deformation must be derived from experimental methods. Frequently change of model and spring materials make it diffcult for the experimental methods to be applied. This paper describes the evaluation of analytical method for detent spring force correction as a substitute to experimental method. FEM(Finite Element Method)is used in the analytical method to find elastic and plastic deformation quantities at various conditions. To find the application of automatic spring force correction system, analytical and experimental results are compared with deformation quantities at various applied forces. It is find that the simulation results of the analitical method is good agreement on those of the experimental method whithin the limit 5%.

세라믹 인서트를 이용한 단조 금형설계

권혁홍 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.3

The use of ceramic inserts in steel forging tools offers significant technical and economic advantages over other materi-als of manufacture. These potential benefits can however only be realised by optimal design of the tools so that the ceramic asserts are not subjected to stresses that lead to their premature failure. In this paper the data on the loading of the tools is determined from a commercial forging simulation package as the contact stress distribution on the die-workpiece interface and as temperature distributions in the die. This data can be processed as load input data for a finite-element die-stress analysis. Process simulation and stress analysis are thus combined during the design, and a data exchange program has been developed that enables optimal design of the dies taking into account the elastic deflections generated in shrink fitting the die inserts and that caused by the stresses generated in the forging process. The stress analysis of the dies is used to determine the stress conditions on the ceramic insert by considering contact and interference effects under both mechanical and thermal loads. Simulation results have been validated as a result of experimental investigations. Laboratory tests on ceramic insert dies have verified the superior performance of the Zirconia and Silicon Nitride ceramic insert in order to prolong maintenance life.

동부스바 인발 금형설계

권혁홍,이정로 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.4

Copper bus-bar is made by drawing process and used in many part of industry. When design drawing die for copper bus-bar, design factor is focused on the deformation of die-land by drawing force and shrink fit. In this paper it is analyzed to determine shrink fit value by shrink fit analysis program which is used with APDL/UIDL language in a commercial FEM package, ANSYS. The shrink fit analysis has been developed that enables optimal design of the dies taking into account the elastic deflections. Elastic deflection is generated in shrink fitting the die inserts and that caused by the stresses generated using DEFORM software for drawing process analysis. This data can be processed as load input data for a finite element die-stress analysis. Process simulation and stress analysis are thus combined during the drawing die design. The stress analysis of the dies is used to determine optimized dimension of die-land.

Hexagonal 인서드용 열간압출 금형설계

권혁홍,이정로 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.1

The use of hexagonal ceramic inserts for copper extrusion dies offers significant technical and economic advantages over other forms of manufacture. In this paper the data on the loading of the tools is determined from a commercial FEM package as the contact stress distribution on the die-workpiece interface and as temperature distributions in the die. This data can be processed as load input data for a finite element die-stress analysis. Process simulation and stress analysis are thus combined during the design, and a data exchange program has been developed that enables optimal design of the dies taking into account the elastic deflections generated in shrink fitting the die inserts and that caused by the stresses generated in the process. The stress analysis of the dies is used to determine the stress conditions on the ceramic inset by considering contact and interference effects under both mechanical and thermal loads.

냉간단조 금형설계에서의 탄성변형 분석에 관한 연구

권혁홍,송승은 한국특허학회 2011 특허학연구 : 한국특허학회지 Vol.13 No.2

헬리컬기어 냉간압출금형의 파손해석

권혁홍 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.2

This paper suggests to predict the failure of helical gear extrusion die. The basic assumption that constitutes the frame-work for any combined stress failure theory is that failure is predicted to occur when the maximum value of stress becomes equal to or exceeds the value of the same modulus that produces failure in a simple uniaxial stress test using the same material. The stresses which were calculated to each critical points are applied maximum normal stress theory and distor-tion energy theory. The theoretical analysis and experimental results for Samanta process and New process dies were com-pared.

겹판스프링의 設計프로그램 開發에 관한 硏究

權赫洪,崔善準 대진대학교 1994 大眞論叢 Vol.2 No.-

Springs for vehicle suspension control the vibration of a car and influence on the ridability, safety, and life of a car In the paper, the computer aided design program has been developed, which design the leaf spring shape from the given specifications using basic theory and the expert's knowledge, and the design results are checked by the analysis theory in order to increase the accuracy, and feed back to the design input For the purpose of easy use, this program consists of pull-down menu and interactive input mode To prove the effectiveness of this program, two springs, of which one is symmetric, other asymmetric, are designed and analyzed, and the outputs are compared to the experiments. Considering the tolerance of the given specifications, the results are good.

Hexagonal 인서트용 열간압출 금형설계

권혁홍,이정로 한국생산제조학회 2001 한국생산제조시스템학회 학술발표대회 논문집 Vol.2001 No.4