Motor cores demand precision for the purpose of product shape refinement and to increase the performance. To enhance the lamination method and the efficiency of the product, the material thickness is becoming thinner. In addition, press machines require a mass-production system with high precision. In an experiment, the effects of the displacement and fluctuations of the bottom dead center on a high-speed press were investigated. The experiment was carried out by sequentially increasing the press speed from 50 to 130 and 270 spm. The bottom dead-center displacement levels of the press were 0 mm at 50 spm and 0.05 mm at 130 spm. At the speed 270 spm, the bottom dead-center displacement increased from 0.1 to 0.15 mm. As a result of analyzing the types of bottom dead-center fluctuation, a change from 61 to 273 μm was considered. The required height to guarantee the quality of the motor core embossing outcome is 0.05 mm, which can be realized by fine adjustments of the mold at a fluctuation level of 61 μm. The embossing process leads to piercing at the fluctuations of 85–89 µm and 273 µm, requiring a total press overhaul or partial repair. In this paper, as the press speed increases, the bottom dead-center displacement increases and the bottom dead-center fluctuation affects the forming results of the embossing process.

电机磁芯要求精度，以精炼产品形状并提高性能。为了提高层压方法和产品效率，材料厚度越来越薄。另外，压力机需要高精度的批量生产系统。在实验中，研究了下死点的位移和波动对高速压机的影响。通过将压机速度从50 spm依次增加到130 spm和270 spm进行实验。压力机的底部死点中心位移水平在50 spm时为0 mm，在130 spm时为0.05 mm。在速度为270 spm时，下止点位移从0.1毫米增加到0.15毫米。分析底部静点波动的类型的结果，考虑了从61到273μm的变化。确保电机芯压花效果质量的所需高度为0.05毫米，这可以通过在61μm的波动水平上对模具进行微调来实现。压花过程会导致在85-89 µm和273 µm的波动处打孔，这需要对印刷机进行大修或部分修复。在本文中，随着压机速度的增加，下止点位移增加，下止点波动影响压花过程的形成结果。