횡력발생 코일스프링 설계 및 제조에 관한 연구

권혁홍,최선준 한국공작기계학회 1998 한국생산제조학회지 Vol.7 No.5

In the automotive suspension system, especially, Mcpherson strut type, if the resultant of the force through tire and the link reaction force is not coincident with the spring force, the side load against shock-absorber occur. The magnitude of side load is proportional to the difference between resultant force and spring force. To reduce side load, several method can be used, and one is to use the side load coil spring. This study summarize the development results of side load coil spring, i.e., how to design, analysis, manufacture, and test.

나선형기어 냉간압출금형의 파손해석

권혁홍 대진대학교 생산기술연구소 2000 생산기술연구소 논문집 Vol.3 No.-

This paper suggests to predict the failure of helical gear extrusion die. The basic assumption that constitutes the framework 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 distortion energy theory. The theoretical analysis and experimental results for Samanta process and New process dies were compared. 주요기술용어 : Failure Analysis(파손해석), Cold Extrusion Die(냉간압출 금형), 최대수직응력 이론(maximum normal stress theory), 비틀림에너지이론(distortion energy theory)

Hexagonal 인서트용 열간압출 금형설계

권혁홍,이정로 한국공작기계학회 2001 한국공작기계학회 춘계학술대회논문집 Vol.2001 No.-

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-work piece 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 insert by considering contact and interference effects under both mechanical and thermal loads.

壓縮코일스프링의 設計自動化

권혁홍,최선준 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.6

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 spec-ifications using basic theory and the expert's knowledge, and the design results arc 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 effec-tiveness of this program, two springs, of which one is symmetric, other asymmetric, arc designed and analyzed, and the outputs are compared to the experiments. Considering the tolerance of the given specifications, the results are good.

중국 상표 선점 대응방안에 대한 연구

권혁홍,정준호 한국지식재산교육연구학회 2020 지식재산 교육과 연구 Vol.8 No.1

최근 중국 내에서 K-브랜드의 인지도가 높아짐에 따라 많은 국내 기업들이 중국에 진출하고 있으나 상표와 같은 지식재산권에 대한 사전 검토나 준비 없이 중국 시장에 진출하는 경우가 많다. 이에 따라 중국의 상표 브로커들이 이를 악용해 상표를 미리 선점한 후 거래를 요구하거나 선점한 상표를 활용해 유사 사업을 진행하여 피해를 주는 등 상표분쟁으로 어려움을 겪는 사례들이 종종 발생하고 있다. 본 논문에서는 중국에서 악의적 상표 선점 사례들과 이에 대한 실제 기업들의 대응 결과, 상표법상 악의적 선점에 대응할 수 있는 제도 등을 통해 유사한 피해가 발생하지 않도록 하는 방안을 제시하고 실무적 차원에서의 시사점을 고찰한다. Recently, as K-brand's awareness in China has increased, many domestic companies have entered China. But they often entered the Chinese market without prior review or preparation for intellectual property rights such as trademarks. As a result, they had often difficulties in which trademark brokers in China were struggling with trademark disputes by exploiting them to preempt the trademark in advance, requesting a transaction, or conducting similar business using the preempted trademark to damage it. In this paper, we propose ways to prevent similar damages from the cases of malicious trademark preemption in China and actual companies' response to it, and a system that can respond to malicious preemption in the trademark law, and consider the implications at the practical level.

전주기법 홀로그램이 부가된 금속패턴붙박이 도어 제작

권혁홍 한국기계가공학회 2015 한국기계가공학회지 Vol.14 No.1

I developed a high-quality metal door with a hologram-pattern design using a high-speed electroforming process. In this study, the major processes were master production, conducting grant, nickel-sulfamate acid electroforming, ablation treatment, and final dressing. The processing system was provided with a nickel sulfamate pole, and a rotary-pole PP-plating jig in a circular tank. This approach could reduce defects and errors, as much as possible, by its use of a hologram pattern to create the master of a metal door. The thin-sheet metal-creation process for the door built-in metal pattern using electroforming with hologram was successful.

전주기술을 이용한 로터리스크린 제조에 관한 연구

권혁홍,박상호 대진대학교 2004 大眞論叢 Vol.11 No.-

To simple the manufacturing process of rotary screen, this study was adopted electroforming technology and produced silicon rubber mandrel. Furthermore, to indicate the optimal condition for the acquisition of high-qualified rotary screen product, the experiment was executed with pH, time, sulfamate nickel solution according to density which were the main factors to decide the condition, then compared it with the product made by original "S" Company in Holland. As a result, the figure of Hole was more obvious and correct. Also the open size increased more than 2-3%.

반쪽 롱테이퍼 스프링과 공기스프링의 조합시 특성해석 연구

권혁홍,최선준 한국공작기계학회 1998 한국생산제조학회지 Vol.7 No.5

Air spring has the advantages to be nearly constant in natural frequency in spite of load change, and to be able to control height level. Half-long taper string has the advantages to function as well link as spring. Thus to utilize two type spring's advantages, half-long taper spring and air spring are combined and used. In this study, the theory to calculate the characteristics in combination is developed.

박판스프링 교정시스템 구축에 관한 연구

권혁홍,김선호 대진대학교 1997 大眞論叢 Vol.5 No.-

This paper describes that study which construct a theoretic and experimental algorithm in order to make the automatic correction system of detent spring, and when load for correction pressed at spring, it can be found elastic and plastic deformation quantities by Finite Element Analysis. As a result, it has been found that the simulation datas are in good agreement with experimetal results.

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.