• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 1994.06a
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• pp.199-230
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• 1994

The blanking sequence of refrigerator and air-conditioner compressor-motor-core has been determined by trial and error. To improve such problem, 2d-analysis using ANSYS to verify the deformation state has been done firstly. And 3d-analysis following up the real process has been done. Additionally, verified the 3-d analysis result using S/W LS-DYNA.

• The monthly packaging world
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• s.356
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• pp.88-93
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• 2022

• Transactions of Materials Processing
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• v.4 no.1
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• pp.17-27
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• 1995

The tact switch is widely used in electric and electronic products. The dome type tact spring is produced by stamping. Stamping of the tact spring and operation of the tact switch have been simulated by the elasto-plastic finite element method. The operating characteristics of the switch may be given by the relation between the operating force and stroke. For a given material, this is affected by two main factors. One is the geometry of dome spring which is determined by the geometry of stamping dies and the stamping pressure, and another one is the dimension of switch. From the calculation, it was possible to obtain the stamping conditions and switch dimension for a predetermined force-stroki relation And, the hoop stresses and effective strains distributions due to the stamping and during the operation of the switch indicate a possibility of cracking in the center and rim of dome spring.

• Journal of the Korean Society for Precision Engineering
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• v.16 no.3 s.96
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• pp.25-29
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• 1999

The lead frame manufactured by press stamping process, is an important part of semiconductor. The recent technical trend of semiconductor, chip sized and high performance package technology, requires the lead frame to be of more multi-leads and of fine ILP (Inner Lead Pitch). As the ILP is getting finer, its corresponding punch of the stamping die is getting narrower. The punch narrower than its stamping limit has been broken due to local buckling. This paper analyzed the phenomena of punch breakdown. Moreover, the punch design was modified to increase the critical limit of buckling force. This paper, also, suggested new design rules of the punch, which asks the modification of its lead frame design that has to be considered in the stage of semiconductor package design. The new design rules of lead frame design yields a good reliability of semiconductor package as well as a good quality of lead frame.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.10a
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• pp.233-234
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• 2009

• Journal of the Korean Society for Precision Engineering
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• v.22 no.2
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• pp.126-132
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• 2005

In this paper, an auto-design system is introduced for a stamping tool based on commercial computer aided design system with its drafting language. The auto-design system consists of tool oriented product design subsystem which modifies and configures the product drawing, tool concept design subsystem which make a design of the punches and their punching progression and parts design subsystem that makes automatic dimension. The system is applied to the mechanical design of the stamping tool. The main logic of the system is based on half-edge theory, a kernel for the 3 dimensional CAD system, which is applied to 2 dimensional drafting auto-design system. The auto-design system enables to conspicuously reducing the designing time of the tool. In addition, there is little drafting error that had been about 3% without auto design program. It is effective to reduce the development time for new products because of rapid designing time of the tools, standardization of the stamping tool and the drafting rule for the auto-design system. The auto-design system yields high efficiency of the tool manufacturing system.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.12 no.6
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• pp.84-92
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• 2013

This study improves the formability in fine-blanking the lock plate of car seat belts using a low carbon steel(SM35C) plate. The optimal die design for the forming process is proposed using rules for process planning based on theories and field experiences. The optimal design is analyzed using commercial finite element software in order to solve the fracture problems in the extrusion process. Through the improved layout based on the FEM results, the fracture of the extruded part and the roll over problem are solved. Furthermore, it is demonstrated through the shown from experiments that the extruded part does not break in the modified die.

• 프린팅코리아
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• s.30
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• pp.164-167
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• 2004

인쇄관련 언론매체를 보면 놀랍게도 일본어로 표기된 단어를 많이 발견할 수 있다. 하리코미, 베타, 고마, 돔보, 도지, 구와에, 돈땡, 모루동, 후렉소, 아지로, 도무송, 싸바리, 단보루 등이 대표적으로 많이 쓰이고 있다. 또한 일본어를 음역하여 견당, 습수, 정합, 노광, 타발, 사양, 중철, 소부, 돗판, 매엽, 하지, 상지 등 우리말에도 없는 것을 계속 사용하고 있다. 이에 박도영 전 교육인적자원부교과서심의위원이 정리한 인쇄용어통일에 대한 연구를 정리.연재한다.

• 프린팅코리아
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• s.27
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• pp.114-119
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• 2004

인쇄관련 언론매체를 보면 놀랍게도 일본어로 표기된 단어를 많이 발견할 수 있다. 하리코미, 베타, 고마, 돔보, 도지, 구와에, 돈땡, 모루동, 후렉소, 아지로, 도무송, 싸바리, 단보루 등이 대표적으로 많이 쓰이고 있다. 또한 일본어를 음역하여 견당, 습수, 정합, 노광, 타발, 사양, 중철, 소부, 돗판, 매엽, 하지, 상지 등 우리말에도 없는 것을 계속 사용하고 있다. 이에 박도영 전 교육인적자원부교과서심의위원이 정리한 인쇄용어통일에 대한 연구를 정리.연재한다.

• 프린팅코리아
• /
• s.28
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• pp.120-123
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• 2004

인쇄관련 언론매체를 보면 놀랍게도 일본어로 표기된 단어를 많이 발견할 수 있다. 하리코미, 베타, 고마, 돔보, 도지, 구와에, 돈땡, 모루동, 후렉소, 아지로, 도무송, 싸바리, 단보루 등이 대표적으로 많이 쓰이고 있다. 또한 일본어를 음역하여 견당, 습수, 정합, 노광, 타발, 사양, 중철, 소부, 돗판, 매엽, 하지, 상지 등 우리말에도 없는 것을 계속 사용하고 있다. 이에 박도영 전 교육인적자원부교과서심의위원이 정리한 인쇄용어통일에 대한 연구를 정리.연재한다.