• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.482-486
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• 1995

Generally, a great deal of attention is given to the maintenance of consistent surface roughness. Therefore one of the major goals of research in this area has been the development of models which can predict the surface roughness obtainable on a machined metal part over the simultaneous variation of cutting condition. A comparison is also made between the theoretical and actual values of surface roughness to calculate the overall variance in the developed models, Mathematical models developed from the experimental data in the course of this work can be employed to control the cutting conditions in order to achieve the desired surface roughness and deep quality.

• 드라이브 ㆍ 컨트롤
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• 제21권1호
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• pp.53-58
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• 2024

With the recent development of intelligence and automation technologies for construction machinery, the demand for safety and efficiency of road-cutting operations has continued to increase. In response to this, a double-blade road cutter has been developed that can automatically cut roads. However, a double-blade road cutter has a load difference between the two blades due to the ground and wear conditions of the cutting blades. The difference in load between the two blades distorts the direction of travel of the cutter. In this study, a vision sensor-based driving guide technology was developed to correct the driving path of road cutters. In addition, we developed a load-sensing technology that detects blade loads in real-time and controls driving speed in the event of overload.

• 디지털융복합연구
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• 제12권1호
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• pp.593-598
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• 2014

조선업종은 숙련공의 감소와 노동력 부족을 해결하기 위해 자동화와 기계화가 필요하다. 특히 조선용 핸드레일 제조공정은 표준화된 타 분야와 달리 자동화가 낙후되어 있다. 본 논문에서는 조선용 핸드레일 제작에 사용할 수 있는 평철 자동화시스템을 컴퓨터 융합기술을 활용하여 설계하고 개발하였다. 시스템 기구부는 절단공정의 효율성, 생산성, 안정성 등을 고려하여 설계하였고, CATIA 와 ANSYS를 사용하여 구조물의 안정성을 확인하였다. 시스템 제어부는 개방성과 확장성을 제공하는 PCNC 콘트롤러를 사용하였고, 터치스크린 방식의 화면 조작을 통해 시스템의 제어 및 모니터링을 할 수 있도록 구축하였다. 평철 자동화시스템은 기계, 전자 그리고 컴퓨터 기술을 융합하여 산업체의 생산성을 향상시킬 수 있도록 개발하였다.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제8권12호
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• pp.297-304
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• 2019

통신, 센서, 인공지능 등의 기술 발전으로 인해 스마트 팩토리 구축이 진행되고 있다. 스마트 팩토리는 기존의 자동화 공정에서 생산되는 데이터를 대상으로 기계 학습과 같은 지능화 기술을 활용해 효율적인 공정 제어를 목표로 한다. 스마트 팩토리로의 구축으로 인해 생산성이 높아지지만 비용도 높아진다. 따라서 소규모 업체들은 스마트 팩토리로 단계별 전환이 효율적이다. CNC 절단기 기반의 소규모 스마트 팩토리 구축을 위해서 본 논문에서는 기존 제조 장비의 데이터를 수집, 모니터링 및 제어할 수 있는 원격 제어 시스템을 제안한다. 원격 제어 시스템의 구조 및 설계와 효율적인 센싱 데이터 전송 방법 등을 제시하였다. 실현 가능성을 검증하기 위해 CNC 절단 장비를 대상으로 시스템을 구현하였고 기능을 검증하였다. 성능 평가를 위해 모니터링 웹 페이지 접속시간을 측정하였고, 구현된 시스템이 사용 가능한 수준이라는 것을 확인하였다.

• 한국건설관리학회논문집
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• 제6권4호
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• pp.142-151
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• 2005

최근 국내 $\cdot$ 외의 경우 기성 콘크리트 파일(PHC) 두부정리 작업의 생산성, 안전성 및 품질 향상을 위해 자동화 장비를 개발중에 있다. 그러나 기존에 개발된 두부정리 자동화 장비는 두부정리 전 작업과정 중 파일 파쇄만을 자동화 대상 작업으로 하고 있고, 파일 파쇄를 위한 말단장치(end-effector) 설계의 오류로 종 방향 균열을 발생시키는 등 문제점이 있는 것으로 분석되었다. 기존 두부정리 자동화 장비가 PHC 파일에 종 방향 균열을 발생시키는 원인은 PHC 파일의 물리적 특성을 고려한 자동화 장비 말단장치의 설계 및 제작, 배치가 제대로 이루어지지 못했기 때문인 것으로 분석되었다. 따라서 본 연구의 목적은 최근 국내에서 개발 중인 PHC 파일 두부정리 자동화 장비의 파일롯타입(pilot type)을 대상으로 다양한 형태의 말단장치를 설계 및 제작하고, 실험실 실험을 통해 최적의 말단장치 조합을 제안함으로써 종 방향 균열 없이 PHC 파일 두부를 효과적으로 그라인딩하고 파쇄할 수 있도록 하는 자동화 장비의 프로토타입을 제시하는 것이다. 본 연구를 통해 제시된 PHC 파일 두부정리 자동화 장비가 개발되어 현장에 적용될 경우, 기존 두부정리 작업의 생력화를 통한 품질, 안전성, 생산성 향상 및 이를 통한 경제성 확보가 가능할 것으로 기대된다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.1137-1140
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• 2005

Automatic welding has been used frequently on pipeline projects. The productivity and reliability are most essential features of the automatic welding system. The mechanized GMAW process is the most widely used welding process and the carriage and band system is most effective welding system for pipeline laying. This application-oriented paper introduces new automatic welding equipment for pipeline construction. It is based on cutting-edge design and practical welding physics to minimize downtime. This paper also describes the control system which was designed and implemented for new automatic welding equipment. The system has the self diagnostic function which facilitates maintenance and repairs, and also has the network function via which the welding task data can be transmitted and the welding process data can be monitored. The laser vision sensor was designed for narrow welding groove in order to implement higher accuracy of seam tracking and fully automatic operation.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2009년도 추계 학술논문 발표대회
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• pp.15-18
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• 2009

Due to its high dependency of manpower, construction work has several difficulties in terms of quality control, imbalance of supply and demand of qualified manpower, safety management for them and improvement of production. Such problems related to the management can be at some degree solved by introducing an automation facility. Since the unique environment of a construction site in the past was not structured, it is very hard to introduce a facility to automate construction work from operation of the equipment to assignment of where to work. This is a preliminary research for automation of construction work. In this study, the trend of development of a cutting-edge technology, RTLS, was researched and analyzed in order to review the possibility of utilizing RTLS in construction work and present a control mechanism for construction equipment. Although the presented mechanism is at the concept stage, which still has lots of restrictions to be solved, the application of the RTLS will be very much feasible. That is, if linkage of the study between the RTLS and the automation of construction is built, it will be expected to contribute to many fields such as cost reduction through efficient and systemic management, the reduction of construction period and precise construction as well as raising the level of the automation of domestic construction work.

• 한국정밀공학회지
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• 제18권12호
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• pp.124-129
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• 2001

Recently, life cycle and lead-time of products have been shortened with the demand of customers. Therefore, it is important to reduce time and cost at the step of manufacturing trial molds. High speed machining can be applied for this kind of purpose with a lot of practical advantages. In our research, several fundamental experiments are carried out to obtain machining parameters such as cutting force, machining time and surface characteristics for tool paths that are appropriate to high-speed machining. Moreover, a trial mold for an automatic transmission knob is fabricated with aluminum-7075 material. Using automatic set-up equipments, an ABS rapid prototype of a trial product of an AT knob is also manufactured with a filling process.

• 한국정밀공학회지
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• 제17권4호
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• pp.114-120
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• 2000

Burr is an unavoidable and undesirable by-product of most metal cutting or shearing operations. This burr must be removed to improve the fit of machined parts and safety of workers, to improve the effectiveness of finishing operations. Despite the full or partial automation of FMC or FMS, deburring operations to obtain workpiece with fine surface quality are difficult to be automated since the occurrence and condition of burr are not constant. This study focused on developing a software for deburring automation, which includes automatic recognition of parts, generation of deburring tool path and NC code, by analyzing the IGES format file which contains information of part geometry. The successful performance of developed software was demonstrated by computer simulation and deburring experiment using miniature end brush. And, this research can provide a basis for further advanced studies for automated deburring applications.

• 한국정밀공학회지
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• 제12권9호
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• pp.95-103
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• 1995

Recently the trends toward reduction in size of industrial products have increased the application of micro drilling. But micro drilling has still much difficulty so that the needs for active control which give adaptation to controller are expanding. In this paper initial cutting condition was determined for some sorkpieces by experiment and GA-based Fuzzy controller was devised by genetic algorithms and fuzzy inference. The fuzzy inference has been applied to the various prob- lems. However the determination of the membership function is one of the difficult problem. So we introduce a genetic algorithms and propose a self-tuning method of fuzzy membership function. Based on this intelligent control, automation of micro drilling was carried out like the cutting process of skilled machinist.