International Journal of Earth Sciences and Engineering

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Development of New Apparatus to Evaluate Ultrasonic Reflection Characteristic for Wrinkling in Press Forming


Affiliations
1 Department of Mechanical Engineering, National Institute of Technology, Miyakonojo College, 473-1, Yoshio-cho, Miyakonojo, Miyazaki-885-8567, Japan
2 Graduate School of Science and Technology, Kumamoto University, 2-39-1, Kurokami, Chuo-Ku, Kumamoto-860-8555, Japan
3 Kumamoto University, 2-39-1, Kurokami, Chuo-Ku, Kumamoto-860-8555, Japan
4 Magnesium Research Center, Kumamoto University, 2-39-1, Kurokami, Chuo-Ku, Kumamoto-860-8555, Japan
5 Technical Division, Kumamoto University, 2-39-1, Kurokami, Chuo-Ku, Kumamoto-860-8555, Japan
6 Department of Integrated System Engineering, Nishinippon Institute of Technology, 1-11, Aratsu, Kanda-Machi, Miyako-Gun, Fukuoka-800-0344, Japan
7 Department of Integrated System Engineering, Nishinippon Institute of Technology, Japan
 

It is difficult to completely prevent the formation of defects in metal press forming, unless inspecting the entire products. This study suggests an in-process inspection using an ultrasonic measurement in order to avoid such a problem. This method is effective for detecting wrinkles formed in a material during the process. A numerical analysis clarified the relationship between wrinkle shapes and the reflection behaviour of ultrasonic waves. In this study, we developed an experimental apparatus that provided quantitative data explaining the relationship between ultrasonic reflection intensity and the wrinkle shapes. The die of the developed apparatus was in sufficient contact with the specimen machined into the wrinkle shape. The ultrasonic reflection characteristics varied by the wrinkle characteristics.

Keywords

Press Forming, Defect Detect, Wrinkle, In-Process, Ultrasonic Measurement.
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  • Development of New Apparatus to Evaluate Ultrasonic Reflection Characteristic for Wrinkling in Press Forming

Abstract Views: 191  |  PDF Views: 109

Authors

Yuji Segawa
Department of Mechanical Engineering, National Institute of Technology, Miyakonojo College, 473-1, Yoshio-cho, Miyakonojo, Miyazaki-885-8567, Japan
Takuya Kuriyama
Graduate School of Science and Technology, Kumamoto University, 2-39-1, Kurokami, Chuo-Ku, Kumamoto-860-8555, Japan
Yasuo Marumo
Kumamoto University, 2-39-1, Kurokami, Chuo-Ku, Kumamoto-860-8555, Japan
Taekyung Lee
Magnesium Research Center, Kumamoto University, 2-39-1, Kurokami, Chuo-Ku, Kumamoto-860-8555, Japan
Yasuhiro Imamura
Technical Division, Kumamoto University, 2-39-1, Kurokami, Chuo-Ku, Kumamoto-860-8555, Japan
Tomohiro Nonaka
Department of Integrated System Engineering, Nishinippon Institute of Technology, 1-11, Aratsu, Kanda-Machi, Miyako-Gun, Fukuoka-800-0344, Japan
Yutaka Sakata
Department of Integrated System Engineering, Nishinippon Institute of Technology, Japan

Abstract


It is difficult to completely prevent the formation of defects in metal press forming, unless inspecting the entire products. This study suggests an in-process inspection using an ultrasonic measurement in order to avoid such a problem. This method is effective for detecting wrinkles formed in a material during the process. A numerical analysis clarified the relationship between wrinkle shapes and the reflection behaviour of ultrasonic waves. In this study, we developed an experimental apparatus that provided quantitative data explaining the relationship between ultrasonic reflection intensity and the wrinkle shapes. The die of the developed apparatus was in sufficient contact with the specimen machined into the wrinkle shape. The ultrasonic reflection characteristics varied by the wrinkle characteristics.

Keywords


Press Forming, Defect Detect, Wrinkle, In-Process, Ultrasonic Measurement.