• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2000년도 추계학술대회 논문집
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• pp.109-113
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• 2000

The piercing and blanking of thin sheet metal working with a pilot punch guide is specified division in press die design and making. In order to prevent the detects, the optimum design of the production part, strip process layout, die design, die making and try out etc. are necessary the analysis of effective factors. For example, theory and practice of metal shearing process and its phenomena, die structure, machine tool working for die making, die materials and its heat treatment, metal working in industrial and its know how etc. In this study, we analyzed whole of data base, theoretical back ground of metal working process, and then performed the progressive die tryout with the screw press. This study regards to the aim of small quantity of production part's press working by piloting for accurate guide of actual sheet metal strip. Part 1 of this study reveals with production part and strip process layout for the die design.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2001년도 추계학술대회(한국공작기계학회)
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• pp.190-195
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• 2001

The piercing and blanking of thin sheet metal working is specified division in press die design and making. In order to prevent the defects, the optimum design of the production part, strip process layout, die design, die making and try out etc. are necessary the analysis of effective factors. For example, theory and practice of metal shearing process and it's phenomena, die structure, machine tool working for die making, die materials and it's heat treatment, metal working in field, their know how etc. are included in those factors. In this study, we analyzed whole of data base, theoretical back ground of metal working process, and then performed the progressive die tryout with the screw press.

• 대한기계학회논문집A
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• 제38권1호
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• pp.79-88
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• 2014

제품 정밀도와 생산성 향상을 위해 고속프레스의 초고속화 및 초정밀화 기술이 더욱 중요해지고 있다. 그러나 고속프레스는 작동 속도 증가에 따라 슬라이드의 반복 위치 정밀도가 저하되고 프레스 구조 부품의 파손 위험성은 증가하는 것으로 알려져 있다. 따라서 고속프레스의 설계 정밀도를 향상시키기 위해서는 이런 문제점을 해석적으로 예측하고 설계에 미리 반영하는 것이 필요하다. 이번 연구에서는 편심 질량을 갖는 프레스 구동부 부품의 회전에 따른 동적 탄성 변형을 유한요소해석과 실험을 통해 분석하였다. 이를 통해 고속의 작동 조건에서 프레스의 정밀도와 파손 위험성 변화를 평가하였다.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2000년도 추계학술대회 논문집
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• pp.114-117
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• 2000

In order to keep the zero defect of production in press working process. The optimum design of the production part, strip process layout, die design, die making and try out etc. are necessary the analysis of effective factors. For example, theory and practice of metal shearing process and it's phenomena, die structure, machine tool working for die making, die materials and it's heat treatment, metal working in field, their know how tc. are included in those factors. In this study, we analyzed whole of data base, theoretical back ground of metal working process, and then performed the progressive die tryout with the screw press. Part 2 of this study reveals with precision progressive die design, its making and tryout.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2000년도 제32회 추계학술대회 정기총회
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• pp.129-133
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• 2000

Vapor oil fer radiator fm press in heat exchangers of air conditioners is carefully considered as the cooling performance can be affected by the residual vapor oil on the surface of radiator fin after fin press working. In this work, vapor oil for radiator fin press was developed in consideration of several properties such as physical characteristics, the rate of volatility, hazardous properties and material compatibility. In addition, it was confirmed that radiator fin press workability adopting the vapor oil and the cooling performance of air conditioner using the radiator fin were good.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1992년도 춘계학술대회 논문집 92
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• pp.1-10
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• 1992

Press is one of the most dangerous machine among the hazardous machinery. So, the apparatus of low cost automation is suggested to supply circumferential workpieces to press. And the apparatus is mocked up to apply practically.

• 소성∙가공
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• 제9권2호
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• pp.171-178
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• 2000

This paper is concerned with the optimization of the drive for linear-guide press which is one of mechanical presses. The design of linear-guide drive for a mechanical press is introduced and the drive for the linear-guide press is optimized for the improvement of load and velocity characteristics. As a result of optimization, the load capacity during stroke increases and the slide velocity decreases in working region, respectively. The new design could be suited to many applications in precision forming such as extrusion and the sheet metal-forming processes.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.118.5-118
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• 2002

To apply induction hardening method to a press die having 3-D free surface, the induction hardening tool moves on a press die above 1～2mm gap with constant velocity. Since the induction hardening process requires its own hardening path for each die, a direct teaching method which generates working path directly guided by operators is more suitable than an offline method using CAD/CAM data. The direct teaching apparatus in this work includes a teaching tool with a force/torque sensor and data processing computer to finally generate robot's Induction hardening program , in direct teaching operation, an operator teaches working path maintaining contact with surface of press die by holding...

• 대한안전경영과학회지
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• 제6권3호
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• pp.53-64
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• 2004

Repetition Strain Injury (RSI) is usually caused or aggravated by poor work processes and unsuitable working conditions - that involve repetitive or forceful movements or the maintenance of constrained or awkward postures. The condition is characterized by discomfort and persistent pain. There are three essential steps to eliminate or control hazards In workplace. Case and Demographic Characteristics for Work-related Injuries and illnesses Involving Days Away From Work, 2002. U.S' was examined. Causes of press operators' RSI were carpal tunnel syndrome(CTS), tendonitis, low back pain, and occupational stress. Recommendations for improvement of productivity are redesign of working conditions, exercise, prevent of RSI and avoiding stress.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 추계학술대회 논문집
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• pp.806-809
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• 1996

The present development relates to an apparatus for loading or unloading a workpiece, and more particularly, to an apparatus for loading or unloading a workpiece from a press die or supplier An apparatus for loading or unloading a workpiece has been installed in a press in order to load or unload a workpiece from a press die. There has been known such a loading or unloading apparatus as the apparatus can feed a workpiece in not only the horizontal direction but also in the vortical direction. Press working system in automotive factories are now switching over to a transfer press work ing system. The current problem to be sieved immediately is to automate the existing manual press lines for the manpower saving and speedy production. “Automation system for press line”has just been developed to meet the above trend. The loader and unloader are development under the design concept for high performance, easy control and operational safety to meet the more extensive.