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Study on the Incremental Sheet Forming Process with the Ball Type Tool
경준현(Jun-Hyun Kyeong),이병협(Byeong-Hyeop Lee),이선재(Sun-Jae Lee),조경훈(Kyeong-Hoon Cho),윤형원(Hyung-Won Youn),이창환(Chang-Whan Lee) Korean Society for Precision Engineering 2022 한국정밀공학회지 Vol.39 No.5
The incremental sheet forming (ISF) process is a method of forming a metal sheet with a machine tool, such as a CNC or robot arm. In this study, the surface characteristics of the ISF process using the ball type tool and the conventional hemispherical tool were analyzed. Comparative experiments were conducted with the same size of the hemispherical tool and ball type tool. In experiments, the tool feed rate and spindle were fixed, and the step down was set up with seven levels. The surface profiles and roughness such as R<SUB>a</SUB> and R<SUB>z</SUB> after the ISF process with different values of the step down were compared. Additionally, the surface morphologies were analyzed through the scanning electron microscope. A ball type tool which can move and roll, can reduce the effect of friction effectively. As a result, the ISF process with a ball type tool can greatly reduce the damage of the surface of the product.
이귀주 ( Kwi Joo Lee ),안정선 ( Jung Sun An ),이충환 ( Chung Hwan Lee ),최유석 ( Yu Sok Choi ),조경훈 ( Kyeong Hoon Cho ),이건호 ( Gun Ho Lee ) 조선대학교 공학기술연구원 2015 공학기술논문지 Vol.8 No.1
In this paper, the development results of energy saving device for 57m class strut supported twin screw car ferry has been presented. The series of theoretical calculation with CFD code of Ship flow for some variations of strut fin were performed, and model test in towing tank has been carried out with selected device. The result of towing tank test shows up to 6% power gain in full load condition of design speed of 10Kts.