To simulate the effects of a draw bead, a process that restricts metal from flowing into the cavity, grit cloth or sandpaper can be placed on one or both sides of the blank in a specific area.

• 为了模拟拉延筋的效果，我们可以在料片特定处单面或双面放置粗布或砂纸，来限制金属流进凹模型腔。