Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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A study on measuring friction vibration in flange area during deep drawing process

프레스 딥 드로잉 가공 시 플랜지부의 마찰진동 측정에 관한 기초연구

  • Jae-Woong Yun (Department of Digital Convergence Metalmold Engineering, Kongju National University)
  • 윤재웅 (국립공주대학교 디지털융합금형공학과)
  • Received : 2023.12.09
  • Accepted : 2023.12.31
  • Published : 2023.12.31
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Abstract

In this study, it was studied whether a new measurement factor "frictional vibration" that occurs due to the material flow of the die and sheet metal in the flange area during deep drawing process, could be measured using an vibration sensor. The blank holder force acting on the flange area during drawing processing acts as a friction force in the opposite direction into which the sheet material flows and causes friction vibration. As the blank holder force increases, the friction force increases, and as the blank holder force decreases, the friction force also decreases. Because of this, friction vibration also increases and decreases in proportion to the size of the blank holder force. According to this theory, whether frictional vibration occurs was measured using a flange simulator and a vibration sensor. The initial pressure was created using a torque wrench, and it was confirmed that the amplitude increased by about 4 times when torque 6 Nm was increased. When the forming velocity was rapidly changed to 300 mm/min, the amplitude increased approximately 4 times. It was confirmed that the amplitude of frictional vibration according to the measurement location was greater the further away from the specimen. It was verified that a new measurement factor "friction vibration" in the flange area can be measured and used for online monitoring.

Keywords

Acknowledgement

본 논문은 2023년 공주대학교 학술연구지원사업의 연구 지원에 의하여 연구되었다.

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