• International Journal of Precision Engineering and Manufacturing
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• 제3권3호
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• pp.50-55
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• 2002

A roller gear cam mechanism is presented. It consists of two or more plate cams with particular teeth, called Conjugate Cam Tooth (CCT) and a turret with axially located rollers. A practical and available configuration has been found out by synthesizing its parameters. The profile equations of the conjugate cam are derived by using a relative velocity method. A program fur the design automation of shape of the conjugate cam and the motion simulation of this kind of mechanism has been deve1oped using the derived formulae with C++ language. Finally, an example is given.

• 한국생산제조학회지
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• 제26권2호
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• pp.257-261
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• 2017

Drilling file is medical mini-drill which is made of Ni-Ti material and has tapered shape. It's for removing teeth nervine which helps the endodontic treatment. All files, saled at domestic market, are imported from U.S. and Europe. Also they have low manufacturing efficiency and high price because it is made by universal 5 axis CNC grinding machine. To solve these problem, 3 axis CNC table, controllable tilting angle spindle and helix angle moving table are devised. To confirm divised CNC grinding machine's manufacturing accuracy, conveying amount and finish product size measurement expreiment has been practiced. Also to automate all manufacturing processes, automatic mechanism is designed.

• 한국기계가공학회지
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• 제2권2호
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• pp.52-59
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• 2003

Cam mechanism is a machine part frequently used in machinery. Specially, conjugate cam mechanism is very suitable for the high speed working and the heavy power translation. Then a conjugate cam mechanism need high precision for the relations between cam profiles and follower rollers. So, its design and manufacturing are very difficult. Thus, this study is a branch of exclusive CAM systems for design and NC machining of conjugate earn mechanism based on a master plate earn profile in order to exchange an old plate cam mechanism to a new conjugate earn mechanism. For the design of the other cam profile by using a master cam profile, some calculation processes were used by vector summation methods, from master cam profile data to the center data of master follower, from the center data of master follower to the center data of the other follower considered in link mechanism, and offsetting in the center direction of base circle of the other cam from the center data of the other follower. Finally, a sample conjugate cam was selected and machined m order to prove the contents of this study.

• 산업기술연구
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• 제19권
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• pp.321-329
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• 1999

An automated manufacturing process mechanism for string musical instruments has been designed in this study. In contrast to other manufacturing products, classical string instruments try to preserve their traditional design shapes even in these days and involve variety of wood working(carpentry) characteristics including highly skilled curved surfaces treatments. Great efforts have been put to develop an integrated and automated system for improved product quality and process control, reduced physical labors, better safety etc. They, however, have been limited to devise jigs and tools with regard to selected processes due to lack of technology and research man-powers. We carefully examined the products and process characteristics, and an automated mechanism which overcome prevailing drawbacks has been derived.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.393-394
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• 2012

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2004년도 춘계공동학술대회 논문집
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• pp.467-470
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• 2004

MANPro-based control is a novel control paradigm aimed at intelligent manufacturing systems on the basis of mobile agent-based negotiation process (MANPro). MANPro is a negotiation mechanism based on the agent-based control architecture and, especially, it adapts a mobile agent system called N-agent for the negotiation process. N-agent travels around the network of distributed manufacturing systems to acquire information, and it makes a decision for system control according to the obtained information. MANPro includes communication architecture and information architecture for intelligent shop floor control. MANPro also considers the following issues: (1) negotiation mechanism, (2) single-agent internal strategic policies, and (3) information model. Communication architecture concerns the first issue of the negotiation mechanism. It provides information exchanging mechanism with functional modules. In specific, N-agent is equipped with an intelligent reasoning engine with a built-in knowledge base. This reasoning engine is closely related to the single-agent internal strategic policies of the second issue. Finally, ontology-based information architecture addresses information models and provides a framework for information modeling on negotiation. In this paper, these three issues are addressed in detail and a framework of MANPro-based control is also proposed.

• 한국산학기술학회논문지
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• 제4권1호
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• pp.31-35
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• 2003

스위치 박스는 건축물의 전선관용으로 사용되는 금속제 박스이다. 이 박스를 제조할 때는 프레스 5∼6대, 금형 5∼6 벌, 태핑머신 1대, 작업자 7∼8명이 요구된다. 그래서 제조원가의 상승, 근로자의 작업기피 현상이 문제점이다. 이 문제점을 해』하기 위하여 기존의 금형을 머디파이하고, 핸들링 장치를 개발함으로써 제조공정을 개선시키고자 하였다. 따라서 연구개발 결과 프레스 2대, 금형 2벌, 태핑머신 1대, 작업자 1명으로 단축시켜 생력화, 생인화, 원가절감. 수입대체 효과를 얻게 되었다.

• 디지털융복합연구
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• 제11권11호
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• pp.233-242
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• 2013

기술혁신을 하기 위한 R&D에는 많은 시간과 비용이 투입된다. 따라서 기술혁신을 위해 투자된 연구개발 비용에 대한 전유성을 확보하기 위한 전략이 중요하다. 전유성이란 기술혁신에 대한 수익을 배타적으로 보호 확보할 수 있는 정도를 뜻하며 특허(patent), 영업비밀(secrecy), 리드타임(lead time advantage), 보완적 판매 및 서비스(complementary sales & service), 보완적 제조(complementary manufacturing) 등 5가지의 전유 메커니즘(appropriability mechanism)이 있다. 본 연구에서는 국내 소프트웨어 산업의 전문가들을 대상으로 어떠한 전유성 확보전략을 취하고 있는지에 대하여 설문조사를 하였고, 쌍대비교 기법을 통해 각 요인들의 우선순위를 도출하여 선행연구와 비교하였다. 분석 결과, 국내 IT 제조기업에서는 영업비밀, 특허, 리드타임, 보완적 판매 및 서비스, 보완적 제조의 순으로 전유 메커니즘을 선호하고 있음을 확인하였다.

• 한국기계가공학회지
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• 제5권1호
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• pp.39-44
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• 2006

Ultra precision positioning mechanism has been widely used on semiconductor manufacturing equipments, optical spectrum analyzers and cell manipulations. Ultra precision positioning mechanism consists of several actuators, sensors, guides and control systems. Its efficiency depends on each performance of components. The object of this study is to design and analyze the micro stage that is one of the equipments embodied in ultra precision positioning mechanism. The micro stage consists of PZT actuators and flexure hinges. The structural design of flexure hinge is optimized by using RSM and FEM. The control factors concerned with the design of flexure hinges of stage and arms are optimized by minimizing the equivalent stress on the hinge and maximizing 1st natural frequency based on RSM and FEM simulation under various kinds of design conditions.

• 산업경영시스템학회지
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• 제35권1호
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• pp.115-123
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• 2012

Material flow control mechanism is a kind of operational policy in manufacturing. It is very important because it varies throughput, throughput time, and work-in-process (WIP) under the same manufacturing resources. Many Researchers have developed various material flow control mechanisms and insisted that their mechanism is superior to others. However the experimental environment used in the performance comparison are different and impractical. In this paper, we set various manufacturing environments to fairly compare five previous material flow control mechanism : Push, Pull, CONWIP, Gated MaxWIP, and Critical WIP Loops. The simulation results show that the Push is superior to others in both of throughput and WIP if required demand is less than 80% of capacity. In addition, the performance of CONWIP and its variants are not different statistically.