ABSTRACT

In this study, both blanking and fine blanking processes were performed using 1mm thick DP600 and DP800 sheet materials. The cutting surfaces of the materials were examined using scanning electron microscopy (SEM). The SEM examinations showed that the extent of the fracture zone in the blanking method was much greater than in the fine blanking method, whereas the extent of the shear zone in the fine blanking method was much greater than in the blanking method. In addition, in the fine blanking experiment, it was observed that the crescent and star pieces were nearly all sheared and detached from the test material, whereas with the blanking method, the crescent and star pieces were broken off from the test material. In the blanking, more than half of the cutting surface (0.6t) formed a fracture zone, while in the fine blanking no fracture zone and a shear zone of 0.9t was seen.

摘要

在本研究中，冲裁和精冲工艺均使用 1 毫米厚的 DP600 和 DP800 板材进行。使用扫描电子显微镜（SEM）检查材料的切割表面。SEM 检测表明，冲裁法的断裂区范围远大于精冲法，而精冲法的剪切区范围远大于冲裁法。此外，在精冲实验中，观察到新月形和星形片几乎全部从测试材料上剪切和脱离，而使用冲裁法，新月形和星形片从测试材料上断裂。在下料时，超过一半的切削面（0.6t）形成了断裂带，