• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.11a
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• pp.567-570
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• 2000

Optimization of structure of a high-precision stamping press structure is performed by combination of Taguchi Method and finite element analysis. Too much difference in the stiffness between hydrostatic bearing linear guide and press structure is observed. Efforts are made to level up the stiffness of press structure to the level of hydrostatic bearing's. Some important design parameters are identified and discussed.

• Design & Manufacturing
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• v.17 no.4
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• pp.14-23
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• 2023

The electric vehicle market is developing rapidly around the world. Also, parts of electric vehicles require precision.In order to produce high-precision motor cores,Press equipment must also have good precision. Drive motor cores are an important technology for electric vehicles. It uses a large high-speed press to mass-produce drive motor cores. Because it's a large high-speed press, there are many reasons why the precision is not good. One of the causes is vibration and noise. Recently, as environmental demands have become stricter, regulations on noise and vibration have been strengthened. It is important for press machines to reduce vibration first for sound insulation and dust proofing. This is because the "breakthrough" phenomenon occurs in the press. Dynamic precision is the precision under the load of the press, Design considering strain and stiffness shall be made. Vibration and noise may occur due to SPM of high-speed press,And vibration and noise can cause structural deformation of the press. Structural deformation of the press can affect the precision of the product.Noise and vibration also cause problems for workers and work environments. Problems with vibration and noise occur during press processing, and vibration and noise lead to damage to the mold or defects in the product. Reliability in high-quality technology must be secured with low noise and low vibration during press processing. Modular shape and deformation energy effects were analyzed through finite element analysis. In this study, a study on vibration and noise countermeasures was conducted through finite element analysis of a large high-speed press.

• Design & Manufacturing
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• v.16 no.4
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• pp.40-45
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• 2022

The EV electric vehicle market is growing rapidly worldwide. An electric vehicle means a vehicle that uses energy charged through an electricity source as power. The precision of the press is important to mass-produce the drive motor, which is a key component of the electric vehicle. The size of the driving motor is increasing, and The size of the mold is also growing. In this study, the precision of large high-speed presses for mass production of driving motors was measured. A study was conducted on the measurement method of press and the analysis of measurement data. A drive motor is a component that transmits power by converting electrical energy into kinetic energy. EV driven motors have key material properties to improve efficiency. The material properties are the thickness of the material. As a method for improving performance, use a 0.2mm thin steel sheet. Mold is also becoming larger. As the mold grows, the size of the high-speed press for mass production of the driving motor is also increasing. Also, the precision of the press is the most important because it uses a thin iron plate material. So the importance of large press precision is being emphasized. In this study, the effect of large high-speed press structure on precision was verified

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.769-773
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• 2001

Linear hydrostatic bearings have high stiffness, high damping and excellent guided motion straightness, and thus they are suitable for high precision machine tools. This paper describes the procedure for design and test of a high precision stamping press with vertical hydrostatic bearings. For a hydrostatic bearing set designed and manufactured, measurements were made for the straightness, repeatability and stiffness. They are found to be 1.36$\mu\textrm{m}$/100mm, 0.19$\mu\textrm{m}$/100mm and 1, 261N/$\mu\textrm{m}$ respectively. Based upon the experiences with the hydrostatic bearing, an improved design of the precision press is proposed.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.563-564
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• 2011

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.819-820
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• 2013

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.1329-1330
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• 2011

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2001.05a
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• pp.225-230
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• 2001

Hydrostatic bearings have been applied to high precision machine tools and instruments due to their high stiffness, high damping and excellent guided motion straightness. In this paper, we present a procedure for design and test of a high precision press with linear hydrostatic bearings. For a hydrostatic bearing set designed manufactured, measurements were made for the motion straightness, repeatability and bearing stiffness. They are found to be 1.36${\mu}m$/100mm, 0.19${\mu}m$/100mm and 1,261N/${\mu}m$ respectively. With some experience with the hydrostatic bearing, design aspects of the precision press is discussed.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2008.11a
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• pp.43-44
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• 2008

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.291-292
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• 2012