A Fuzzy Logic Base for Selecting Optimal Clearance of Die-Cutting Process

Failure Investigation of Blank Holder Force (BHF) Control in The Outside Bracket For Front Seat

“…A blank holder is a part that pressing and preventing wrinkles in the material (Ahmetoglu et al, 1992). The delay that occurs on the blank holder can be caused by several factors, such as the material being formed (Zhang and Wang, 2022), positioning of springs, insufficient blank holder force (Brun et al, 2021;Gavas and Izciler, 2006), the presence of obstructive scrap, and insufficient clearance (Sontamino and Nitnara, 2022). According to (Takatsu et al, 2022), SCGA 440-45 has the same properties as JIS 3302, which indicates that this material is suitable for sheet metal forming.…”

“…Additionally, the position of the spring is relatively far from the piercing area (figure 8). It is critical to note that a center of gravity that is located too far in the blank holder will result in a distribution of force that is not equally distributed, which will result in a reduction in material flow in one place (but not in other places) that will adversely affect product quality (Feng et al, 2019;Sontamino and Nitnara, 2022;Zhang and Qin, 2022). In order for the BHF distribution to be even, the blank holder spring is reduced (Ahmetoglu et al, 1992;Koowattanasuchat et al, 2016;Shulkin et al, 2000), see Figure 8.…”