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Kim, Jae-Seon;Lee, Meong-Ho;Youn, Jae-Woong
- Journal of the Korea Convergence Society
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- v.12 no.9
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- pp.161-168
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- 2021
As the demand for high speed and high precision increases in the field of machine tool, interest in stiffness and vibration of machine tool is increasing. However, it takes a lot of time to develop a detailed design of machine tool based on experience, and it is difficult to design appropriately. Recently, structural optimization using FEM are increasingly used in machine tool design. But, it is difficult to optimize in consideration of the vibration state of the structure since optimization through stress distribution of a structure is mainly used, In this paper, Static structural analysis, mode analysis, and harmonic analysis using FEM were conducted to optimize the head structure that has the most influence on machining in a 5-axis machine tool. It is proposed a topology optimization analysis method that considers both static stiffness and dynamic stiffness using objective function design.
https://doi.org/10.15207/JKCS.2021.12.9.161 인용 PDF KSCI

Suh, Sangjin
- Journal of the Korean Academy of Esthetic Dentistry
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- v.26 no.2
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- pp.68-83
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- 2017
With the increasing popularity of dental CAD / CAM, the kinds of materials that can be used and the range that can be utilized are also increasing. One of the biggest advantages of a dental CADCAM is that you can make a final prosthesis with one visit, but in case of zirconia or a complex aesthetic prosthesis, it is often difficult to make it in one day. In this case, temporary PMMA material can be used to provide a temporary crown with aesthetic and functional properties to the patient and can be used as a test crown or template for the final prosthesis. And if you are with a 5-axis milling machine in a clinic, you can make a temporary crown precisely to a large extent in a short time. In this article, various applications and clinical cases of PMMA temporary crown in the clinic will be presented.
https://doi.org/10.15522/jkaed.2017.26.2.68 인용 PDF KSCI

Kim, Nam-Hun
- Journal of the Korean Society of Manufacturing Process Engineers
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- v.10 no.6
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- pp.109-114
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- 2011
Manufacturing process of plugs is firstly performed in the making of FRP yacht so it is an essential process for making original form. In the developed countries, it has been useful to manufacture structures of streamlined forms or complex forms, which have been difficult to manufacture due to limits of the traditional hand-made technology, by introducing 5-axis machining technology. In this study, the factors that affect most in the machining were found by using Taguchi Method in order to select the optimized machining conditions for 5-axis machines, and the ways to improve the surface roughness of machined products by applying those factors.
PDF KSCI

Lee, Dong-Mok;Lee, Jae-Chang;Yang, Seung-Han
- Transactions of the Korean Society of Mechanical Engineers A
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- v.37 no.1
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- pp.97-103
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- 2013
This study proposes a path generation technique for simultaneous five-axis driving for ball bar measurement, which is equivalent to cone frustum machining as mentioned in the NAS979 standard. The technique is generalized for a 3D circular path, and it is applicable to all machine tools regardless of their structural configurations. A mathematical machine input model that consists of a five-axis machine tool, ball-bar measurement and conical path information as inputs is presented for easy NC code generation, simulation for various test conditions, and a measurement test. The movement range of rotary axes, which depends on various conditions, is mathematically analyzed based on the proposed conical path model. Moreover, the effect of the movement range on various conditions (apex angle and inclination angle, ball bar tilting acceptance angle, offset position of workpiece ball, etc.) is analyzed.
https://doi.org/10.3795/KSME-A.2013.37.1.097 인용 PDF KSCI