在很多工业部门,对于中小型回转体形状的空心件一般是在条料上利用落料拉延复合工艺冲制的。由于条料上需要留搭边,因而在冲裁后变成废料。而且,落料拉延后的过渡制件在下道工序中还需要沿凸缘或沿制件的高度进行修边,因而又产生了第二次废料,这对大批或大量生产是一个不可忽略的损耗。 In many industrial sectors, blanks for the shape of small and medium-sized rotors are usually blanked on blanks using blanking and drawing processes. As the need to leave the edge of the strip, which became blanked scrap. Moreover, the blanking transitional parts after the blanking process also need to be trimmed along the flange or along the height of the workpiece in the next process, thus resulting in a second scrap, which is not negligible for mass production or mass production loss.