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RISS 인기검색어
- 검색키워드
- 주제어 : Automotive press panel (검색결과 3 건)
- 무료
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Implementation of Nondestructive Crack Detection System for Automotive Press Panel
Hyongi Yoo,Zhenyi Liu,Nguyen Ngoc Quang,Seulkirom Kim,Bien, Franklin IEEE 2016 IEEE Sensors Journal Vol. No.
<P>The first nondestructive crack detection system using acoustic emission (AE) parameter in the AE method for automotive press panels is presented. The cost damage caused by all inspections is worse, recently in the automotive industry. In this paper, a real-time crack detection system with the AE method that is especially produced for the automotive industry is demonstrated. The main purpose of this system is to correctly detect a crack during an ongoing process that operated seven times a minute. The system consisted of two parts: 1) the hardware and 2) digital signal processing part. The software part consisted of the AE parameter analyzer, which used the LabVIEW program. The AE was continuously monitored during the test using a sensor with a sampling rate of 300 kHz. A dome height test was employed for a laboratory measurement. The crack occurrence tendency was measured using a data acquisition system with a sampling rate of 300 kHz and a 20-dB preamplification. As a result, the maximum received frequency is 150 kHz with 120 W of power consumption according to the field test. The operating temperature ranges from -40 degrees C to + 85 degrees C, considering the severe press factory environment for automotive with 1 s for analyzing the data. This research found a promising technique for improving a crack detection system based on experimental results, which showed that the duration of the AE parameters had a high probability of success.</P>
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자동차 프레스 패널 성형을 위한 드로 금형의 어덴덤 곡면 모델링
정연찬(Yunchan Chung) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.6
In the process of draw die design for stamping automotive press panels, the addendum surfaces generated in metal forming simulation software cannot be used in downstream processes such as machining and making draw dies because simulation tools use simple discrete models for the surface geometry. The downstream processes require more precise and continuous geometric models such as NURBS surfaces. Generally, automotive die engineers manually regenerate the addendum surface geometry using the discrete model. This paper presents an automated geometric modeling process for generating addendum surfaces using draft surface models. The design parameters of the section curve for the addendum surfaces are extracted automatically from the draft geometry. Using the extracted design parameters, smooth addendum surfaces are generated automatically as NURBS surfaces. The generated surfaces are G¹ continuous with the part surface and the binder surface, and can be used in downstream processes.
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Development of a geometric modeling tool for rectangular drawbeads in draw dies
정연찬 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.8
This paper presents the development of a geometric modeling tool for rectangular drawbeads on curved binder surfaces in draw dies. The developed tool provides a fully automated and robust modeling procedure for the geometry of the drawbeads. Given a bead curve on the binder surface, the section profiles are computed at the points on the bead curve. The section profiles and the given bead curve make the three-dimensional drawbead as a sweep solid. The sweep solid is mounted and combined on the binder surfaces. Finally, the shoulder and exit edges of the drawbead are rounded. The value of the rounds is easily modified, because the rounding is the last procedure of the modeling process. The developed tool was tested and it was verified that it helps to reduce the modeling time and increase the quality of the drawbeads.
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