Incremental sheet metal forming can be used to manufacture various products without the punch and die set. However, it is difficult to manufacture the desired shape due to section deflection and springback of the sheet. Section deflection is caused by the force of the blank holder for fixing the sheet and the tool for forming the sheet. In this study, we analyzed the characteristics of the section deflection according to the geometries of the circular cup shapes in the sheet incremental forming process. The section deflection increased with an increase in the entering radius and forming angle in the section deflection region. However, section deflection was constant according to the exit radius. In addition, the secondary forming process for reducing the shape error was introduced. The secondary incremental forming process was conducted in the opposite direction. Characteristics of the shape error according to the entering depth of the tool among the forming parameters for reducing the shape error of the cup shape were analyzed. The springback in the cup-shape was reduced by the additional forming process with an optimum entering depth of the tool.
Citations
Citations to this article as recorded by
Study on the Incremental sheet metal forming process using a metal foam as a die Jae-Hyeong Yu, Kyu-Seok Jung, Mohanraj Murugesan, Wan-Jin Chung, Chang-Whan Lee International Journal of Material Forming.2022;[Epub] CrossRef
Study on the Incremental Sheet Forming Process with the Ball Type Tool Jun-Hyun Kyeong, Byeong-Hyeop Lee, Sun-Jae Lee, Kyeong-Hoon Cho, Hyung-Won Youn, Chang-Whan Lee Journal of the Korean Society for Precision Engineering.2022; 39(5): 371. CrossRef
Tool Path Design of the Counter Single Point Incremental Forming Process to Decrease Shape Error Kyu-Seok Jung, Jae-Hyeong Yu, Wan-Jin Chung, Chang-Whan Lee Materials.2020; 13(21): 4719. CrossRef
Hydrostatic forming has recently been applied as a special method for manufacturing products with complex surfaces from sheet or tube metal. However, effects of technological parameters as well as geometrical parameters of die on formability and quality have not been thoroughly studied. It can be seen from research on hydrostatic forming for cylindrical products that the formation of curve radius at the bottom of cylindrical die has a heavy dependence on input parameters: blank holder pressure, liquid pressure, relative depth of die and relative thickness of work piece. Furthermore, small value of curve radius at die bottom is supposed to prevent the formability due to the difference in forming mechanism between hydrostatic forming and conventional drawing. Therefore, it is necessary that the extent to which the curve radius at die bottom relies on the parameters above be evaluated. Using orthogonal second order design, relationships between the parameters and curve radius are studied and presented as functions and graphs. From that, values of curve radius can be suitably defined in different forming modes.
Citations
Citations to this article as recorded by
Fluid Pressure Analysis and Process Stability in Sheet Hydroforming with Die For Steel Sheets Adil Sh. Jaber, Adnan I. Mohammed, Karem M. Younis Management Systems in Production Engineering.2025; 33(1): 54. CrossRef
Experimental Modeling of Pressure in the Hydrostatic Formation of a Cylindrical Cup with Different Materials Trung-Kien Le, Thi-Thu Nguyen, Ngoc-Tam Bui Applied Sciences.2021; 11(13): 5814. CrossRef
On the thickness distribution and the maximum thinning ratio in hydrostatic forming for sheet metal Nguyen Thi Thu, Nguyen Dac Trung International Journal of Modern Physics B.2020; 34(22n24): 2040144. CrossRef
Experimental modeling of fluid pressure in hydrostatic forming for cylindrical product Nguyen Thi Thu, Nguyen Dac Trung International Journal of Modern Physics B.2020; 34(22n24): 2040158. CrossRef
First
Prev
